阅读说明：本技术 一种反向双射式皮芯结构离心纺丝单元 (Reverse bijection type skin-core structure centrifugal spinning unit ) 是由 张智明 李文慧 刘康 梅顺齐 吴紫俊 于 2021-06-10 设计创作，主要内容包括：一种反向双射式皮芯结构离心纺丝单元,包括紧固件、连接件与内部设置有同轴的罐本腔的罐本体,其中,罐本体的顶部依次开设有与罐本腔都相通的左进料口、中进料口、右进料口,罐本体的中部夹于紧固件、连接件之间,罐本体的左右两端分别与左外喷嘴、右外喷嘴相连接,左、右外喷嘴的内部对应的设置有左内喷嘴、右内喷嘴,罐本体内位于中饼体两侧的部位分别为左围柱腔、右围柱腔,左柱内腔的外端依次经左内喷嘴的内腔、左外喷嘴的内腔后与左喷管相连通,右柱内腔的外端依次经右内喷嘴的内腔、右外喷嘴的内腔后与右喷管相连通。本设计不仅产品结构多样,层次丰富,而且牢固度较高,稳定性较强。(The utility model provides a reverse bijection formula skin core structure centrifugal spinning unit, including the fastener, the connecting piece is provided with the jar body in coaxial jar body chamber with inside, wherein, the top of jar body has seted up in proper order all communicating left feed inlet, well feed inlet, right feed inlet with jar body chamber, the middle part of jar body is pressed from both sides between the fastener, the connecting piece, both ends are connected with left outer nozzle, right outer nozzle respectively about jar body, the inside of left and right outer nozzle corresponds is provided with left inner nozzle, right inner nozzle, the position that is located well cake body both sides in jar body is left column cavity, right column cavity of enclosing respectively, the outer end of left column cavity is linked together with left spray tube through the inner chamber of left inner nozzle in proper order, the inner chamber of left outer nozzle is linked together, the outer end of right column cavity is linked together with right spray tube behind the inner chamber of right inner nozzle in proper order, the inner chamber of right outer nozzle. The product structure is various, and the level is abundant, and the firmness is higher moreover, and stability is stronger.)

1. The utility model provides a reverse bijection formula skin core structure centrifugal spinning unit, is provided with jar body (3) of coaxial jar this chamber (30) including inside, the top of jar body (3) is seted up with jar communicating well feed inlet (313) in this chamber (30), both ends are linked together its characterized in that with the inner chamber of left outer nozzle (2), right outer nozzle (20) respectively about jar this chamber (30):

the reverse bijection type skin-core structure centrifugal spinning unit further comprises a fastening piece (7) and a connecting piece (8), a left feeding hole (314), a middle feeding hole (313) and a right feeding hole (315) which are communicated with the tank body cavity (30) are sequentially formed in the top of the tank body (3), the middle of the tank body (3) is clamped between the fastening piece (7) and the connecting piece (8), and the left end and the right end of the tank body (3) are respectively connected with the left outer nozzle (2) and the right outer nozzle (20);

a middle cake body (31) which is vertical to the central axis of the tank body (3) is arranged in the tank body (3), the parts of the tank body (3) which are positioned at the two sides of the middle cake body (31) are respectively a left surrounding column cavity (301) and a right surrounding column cavity (302), the insides of the left surrounding column cavity (301) and the right surrounding column cavity (302) are respectively and correspondingly provided with a left column body (32) and a right column body (33), the inner end of the left column body (32) is connected with the left side surface of the middle cake body (31), the outer end of the left column body (32) extends out of the left column surrounding cavity (301) and then is connected with the left inner nozzle (4), the inner end of the right column (33) is connected with the right side surface of the middle cake body (31), the outer end of the right column (33) extends out of the right surrounding column cavity (302) and then is connected with the right inner nozzle (40), and the height of the side part of the middle cake body (31) is larger than the diameters of the left column (32) and the right column (33); the left inner nozzle (4) is positioned inside the left outer nozzle (2), the right inner nozzle (40) is positioned inside the right outer nozzle (20), and nozzle separation cavities (303) are respectively clamped between the left inner nozzle (4) and the left outer nozzle (2) and between the right inner nozzle (40) and the right outer nozzle (20);

a cake vertical cavity (311) and a cake transverse cavity (312) are arranged inside the middle cake body (31), a left column inner cavity (321) and a right column inner cavity (331) are correspondingly arranged inside the left column body (32) and the right column body (33) respectively, the top of the cake vertical cavity (311) is communicated with the middle feed port (313), the bottom of the cake vertical cavity (311) is communicated with the middle of the cake transverse cavity (312), two ends of the cake transverse cavity (312) are communicated with the inner ends of the left column inner cavity (321) and the right column inner cavity (331) respectively, the outer end of the left column inner cavity (321) is communicated with the left spray pipe (21) after passing through the inner cavity of the left inner nozzle (4) and the inner cavity of the left outer nozzle (2) in sequence, and the outer end of the right column inner cavity (331) is communicated with the right spray pipe (201) after passing through the inner cavity of the right inner nozzle (40) and the inner cavity of the right outer nozzle (20) in sequence;

the top of the left surrounding column cavity (301) is communicated with a left feeding hole (314) formed in the top of the tank body (3), the outer end of the left surrounding column cavity (301) is communicated with the left spray pipe (21) through the inner cavity of the left outer nozzle (2), the top of the right surrounding column cavity (302) is communicated with a right feeding hole (315) formed in the top of the tank body (3), the outer end of the right surrounding column cavity (302) is communicated with the right spray pipe (201) through the inner cavity of the right outer nozzle (20), and the middle feeding hole (313) is located between the left feeding hole (314) and the right feeding hole (315).

2. The reverse bijective sheath-core structured centrifugal spinning unit of claim 1, wherein: the part, close to the middle cake body (31), on the top of the left column enclosing cavity (301) is communicated with a left feed port (314) formed in the top of the tank body (3), and the part, close to the middle cake body (31), on the top of the right column enclosing cavity (302) is communicated with a right feed port (315) formed in the top of the tank body (3);

two liang of being parallel to each other of the axis that cavity (311) was erect to left side feed inlet (314), right feed inlet (315), cake, the axis mutually perpendicular of the horizontal cavity of cake (312) is erect to the cake, and the axis of left post inner chamber (321), the horizontal cavity of cake (312), right post inner chamber (331) all is on same root straight line.

3. The reverse bijective sheath-core structured centrifugal spinning unit according to claim 1 or 2, wherein: the fastening piece (7) comprises a fastening middle top plate (71), a fastening front bottom plate (72) and a fastening rear bottom plate (73) which are connected with the two sides of the fastening middle top plate, the fastening front bottom plate (72) and the fastening rear bottom plate (73) are of L-shaped structures, a fastening insertion hole (74) which is opposite to the middle feeding hole (313) is formed in the middle of the fastening middle top plate (71), and the fastening front bottom plate (72), the fastening middle top plate (71) and the fastening rear bottom plate (73) are sequentially connected into a fastening upper groove (75);

the connecting piece (8) comprises a connecting top seat (81) and a connecting bottom column (82) which are connected up and down, a connecting lower groove (83) corresponding to the fastening upper groove (75) is formed in the middle of the connecting top seat (81), the positions, located on two sides of the connecting lower groove (83), on the connecting top seat (81) are respectively connected with a front top platform (84) and a rear top platform (85), the front top platform (84) is correspondingly connected with the fastening front bottom plate (72), the rear top platform (85) is correspondingly connected with the fastening rear bottom plate (73), and the upper and lower lap joints of the connecting lower groove (83) and the fastening upper groove (75) are used as a clamping groove (70) to clamp the tank body (3).

4. The reverse bijective sheath-core structured centrifugal spinning unit of claim 3, wherein: the bottom of the tank body (3) is provided with a left positioning column hole (34) and a right positioning column hole (35), and the projection of the middle feeding hole (313) on the bottom of the tank body (3) is positioned between the left positioning column hole (34) and the right positioning column hole (35); the middle part of connecting lower recess (83) has been seted up down drive post hole (831) and has been located left recess jack (86) on its both sides, right recess jack (87), the corresponding insertion is provided with left locating pin (861) respectively in left recess jack (86), right recess jack (87), left locating pin (861), the bottom of right locating pin (871) all is located corresponding left recess jack (86), the inside of right recess jack (87), left locating pin (861), the top of right locating pin (871) all extends to corresponding left recess jack (86), the outside of right recess jack (87), and left locating pin (861), the top and left locating post hole (34) of right locating pin (871), right locating post hole (35) carry out the cooperation of inserting that corresponds.

5. The reverse bijective sheath-core structured centrifugal spinning unit of claim 3, wherein: the connecting bottom column (82) comprises a frustum upper bottom column (821) and a cylindrical lower bottom column (822), the large-diameter end of the frustum upper bottom column (821) is connected with the bottom of the connecting top seat (81), and the small-diameter end of the frustum upper bottom column (821) is connected with the top end of the cylindrical lower bottom column (822) in an aligning mode.

6. The reverse bijective sheath-core structured centrifugal spinning unit according to claim 1 or 2, wherein: the left inner nozzle (4) and the right inner nozzle (40) are consistent in structure; the left inner nozzle (4) comprises an inner cylinder (41) and an inner cone (42), the inner end of the inner cylinder (41) is sleeved on the side periphery of the outer end of the left cylinder (32), the outer end of the inner cylinder (41) is connected with the large-diameter end of the inner cone (42), and the small-diameter end of the inner cone (42) extends outwards;

the inner cylinder (41) and the inner cone (42) are respectively and correspondingly provided with an inner cylinder cavity (411) and an inner cone cavity (421), and the inner cone cavity (421) is communicated with the left cylinder inner cavity (321).

7. The reverse bijective sheath-core structured centrifugal spinning unit of claim 6, wherein: the outer end of the left column (32) and the outer end of the right column (33) are consistent in structure; the outer end of the left column (32) comprises a narrow column (322) and a wide column (323) which are both positioned outside the left surrounding column cavity (301), the diameter of the wide column (323) is larger than that of the narrow column (322), the part of the left column (32) positioned in the left surrounding column cavity (301) is connected with the inner end of the wide column (323) in an aligning way, the outer end of the wide column (323) is connected with the inner end of the narrow column (322), and the outer end of the narrow column (322) extends outwards;

the inner column cavity (411) is sleeved on the side wall of the narrow column body (322), the large diameter end of the inner cone cavity (421) is directly aligned and communicated with the left column inner cavity (321), and the small diameter end of the inner cone cavity (421) is communicated with the left spray pipe (21) through the inner cavity of the left outer nozzle (2).

8. The reverse bijective sheath-core structured centrifugal spinning unit according to claim 1 or 2, wherein: the left outer nozzle (2) and the right outer nozzle (20) are consistent in structure; the left outer nozzle (2) comprises an outer rear cylinder (22), an outer middle cylinder (23), an outer front cone (24) and an outer rear cylinder cavity (221), an outer middle cylinder cavity (231) and an outer front cone cavity (241) which are correspondingly arranged inside the outer rear cylinder (22), the diameter of the outer rear cylinder cavity (221) is larger than that of the outer middle cylinder cavity (231), the outer rear cylinder cavity (221) is sleeved on the outer side periphery of the left end of the tank body (3), two ends of the outer middle cylinder cavity (231) are respectively communicated with the large diameter ends of the left surrounding cylinder cavity (301) and the outer front cone cavity (241), the small diameter end of the outer front cone cavity (241) is communicated with the inner spray pipe cavity (211), and the inner spray pipe cavity (211) is coaxially arranged inside the left spray pipe (21).

9. The reverse bijective sheath-core structured centrifugal spinning unit of claim 8, wherein: the structures of the left spray pipe (21) and the right spray pipe (201) are consistent; the left spray pipe (21) comprises a wide spray pipe column (212), a narrow spray pipe column (213) and a wide spray pipe column cavity (214) and a narrow spray pipe column cavity (215) which are correspondingly arranged in the left spray pipe column (21), the inner end of the wide spray pipe column (212) is connected with the small-diameter end of the outer front cone (24), the outer end of the wide spray pipe column (212) is connected with the inner end of the narrow spray pipe column (213), and the outer end of the narrow spray pipe column (213) extends outwards; the inner end of the wide spraying column cavity (214) is communicated with the small-diameter end of the outer front cone cavity (241) in an aligned mode, and the outer end of the wide spraying column cavity (214) is communicated with the inner end of the narrow spraying column cavity (215) in an aligned mode.

10. The reverse bijective sheath-core structured centrifugal spinning unit of claim 8, wherein: the reverse double-jet skin-core structure centrifugal spinning unit further comprises two yarn outlet needle tubes (5), and the single yarn outlet needle tube (5) corresponds to the left outer nozzle (2) or the right outer nozzle (20) one by one; the silk discharging needle tube (5) comprises a needle tube seat section (51), a needle tube waist section (52), a needle tube head section (53) and a needle tube tip section (54) which are connected in sequence, and a needle tube seat cavity (511), a needle tube waist cavity (521), a needle tube head cavity (531) and a needle tube tip cavity (541) which are correspondingly arranged in the needle tube seat section, the needle tube waist cavity (521), the needle tube head cavity (531) and the needle tube tip cavity;

the needle tube seat cavity (511) and the needle tube waist cavity (521) are sequentially sleeved on the outer side periphery of the spray tube narrow column (213), the needle tube head section (53) and the needle tube tip section (54) are positioned outside the spray tube narrow column (213), and a nozzle gap (55) is clamped between the joint of the spray tube wide column (212) and the spray tube narrow column (213) and the needle tube seat section (51); the needle tube tip cavity (541) is communicated with the narrow spray column cavity (215) through the needle tube head cavity (531).

Technical Field

The invention relates to a centrifugal spinning part, belongs to the field of textile machinery, and particularly relates to a reverse bijection type skin-core structure centrifugal spinning unit.

Background

Centrifugal spinning refers to a process in which a polymer melt or solution is spun out of fine holes by centrifugal force and shear force generated by a device rotating at high speed to form fibers.

The utility model discloses an authorization notice number is CN205617001U, the authorization notice day is 2016 year 10 month 5 days' utility model discloses a centrifugal spinning device, it includes the motor, spinning head and collection stick, the spinning head is installed at the pivot top of motor and is driven by the motor and rotate, the cavity that holds the dope in the spinning head has, the spinning head top is equipped with annotates the liquid mouth, the spinning head lateral wall is equipped with the spinneret orifice with the cavity intercommunication, it sets up around the spinning head round to collect the stick, in the application, the spinning head is driven by the motor and is rotated, the dope is spout from the spinneret orifice of spinning head, move between spinneret orifice and collection stick and obtain tensile, the solvent volatilizees simultaneously, form the fibre, receive through collecting the stick and obtain the fibre membrane. Although this design enables centrifugal spinning to obtain fibers, it still has the following drawbacks:

the design can only generate the spinning fiber with a single-core structure, is too single, and cannot meet the requirement of the prior art on the fiber with a complex structure, namely the spinning fiber with an inner structure and an outer structure cannot be produced.

The information disclosed in this background section is only for enhancement of understanding of the general background of the patent application and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

Disclosure of Invention

The invention aims to overcome the defect and problem of single product structure in the prior art and provide a reverse bijection type skin-core structure centrifugal spinning unit with various product structures.

In order to achieve the above purpose, the technical solution of the invention is as follows: a centrifugal spinning unit with a reverse bijection type skin-core structure comprises a tank body, wherein a coaxial tank body cavity is arranged inside the tank body, a middle feeding hole communicated with the tank body cavity is formed in the top of the tank body, and the left end and the right end of the tank body cavity are respectively communicated with inner cavities of a left outer nozzle and a right outer nozzle;

the centrifugal spinning unit with the reverse bijection type skin-core structure further comprises a fastening piece and a connecting piece, a left feeding hole, a middle feeding hole and a right feeding hole which are communicated with the tank cavity are sequentially formed in the top of the tank body, the middle of the tank body is clamped between the fastening piece and the connecting piece, and the left end and the right end of the tank body are respectively connected with the left outer nozzle and the right outer nozzle;

the inner part of the tank body is provided with a middle cake body vertical to the central axis of the tank body, the parts of the tank body, which are positioned at the two sides of the middle cake body, are a left surrounding column cavity and a right surrounding column cavity respectively, the inner parts of the left surrounding column cavity and the right surrounding column cavity are respectively and correspondingly provided with a left column body and a right column body, the inner end of the left column body is connected with the left side surface of the middle cake body, the outer end of the left column body extends out of the left surrounding column cavity and then is connected with a left inner nozzle, the inner end of the right column body is connected with the right side surface of the middle cake body, the outer end of the right column body extends out of the right surrounding column cavity and then is connected with a right inner nozzle, and the height of the side part of the middle cake body is larger than the diameters of the left column body and the right column body; the left inner nozzle is positioned inside the left outer nozzle, the right inner nozzle is positioned inside the right outer nozzle, and nozzle spacing cavities are clamped between the left inner nozzle and the left outer nozzle and between the right inner nozzle and the right outer nozzle;

a cake vertical cavity and a cake transverse cavity are arranged inside the middle cake body, a left column inner cavity and a right column inner cavity are correspondingly arranged inside the left column body and the right column body respectively, the top of the cake vertical cavity is communicated with the middle feed inlet, the bottom of the cake vertical cavity is communicated with the middle of the cake transverse cavity, two ends of the cake transverse cavity are communicated with the inner ends of the left column inner cavity and the right column inner cavity respectively, the outer end of the left column inner cavity is communicated with the left spray pipe after sequentially passing through the inner cavity of the left inner nozzle and the inner cavity of the left outer nozzle, and the outer end of the right column inner cavity is communicated with the right spray pipe after sequentially passing through the inner cavity of the right inner nozzle and the inner cavity of the right outer nozzle;

the top in left side column cavity of enclosing is linked together with the left feed inlet that jar body top was seted up, and the outer end in left side column cavity of enclosing is linked together with left spray tube behind the inner chamber of left outer nozzle, the top in right side column cavity of enclosing is linked together with the right feed inlet that jar body top was seted up, and the outer end in right side column cavity of enclosing is linked together with right spray tube behind the inner chamber of right outer nozzle, and well feed inlet is located between left feed inlet, the right feed inlet.

The part, close to the middle cake, on the top of the left column surrounding cavity is communicated with a left feed port formed in the top of the tank body, and the part, close to the middle cake, on the top of the right column surrounding cavity is communicated with a right feed port formed in the top of the tank body;

two liang of being parallel to each other of axis that left side feed inlet, right feed inlet, cake erect the chamber, the axis that the chamber was erect to the cake is mutually perpendicular with the axis in the horizontal chamber of cake, and the axis of left post inner chamber, the horizontal chamber of cake, right post inner chamber all is on same root straight line.

The fastening piece comprises a fastening middle top plate, a fastening front bottom plate and a fastening rear bottom plate, the fastening front bottom plate and the fastening rear bottom plate are connected with two sides of the fastening middle top plate, the fastening front bottom plate and the fastening rear bottom plate are of L-shaped structures, a fastening jack which is opposite to the middle feed inlet is formed in the middle of the fastening middle top plate, and the fastening front bottom plate, the fastening middle top plate and the fastening rear bottom plate are sequentially connected into a fastening upper groove;

the connecting piece comprises a connecting top seat and a connecting bottom column which are connected up and down, a connecting lower groove corresponding to the fastening upper groove is formed in the middle of the connecting top seat, the positions, located on the two sides of the connecting lower groove, of the connecting top seat are respectively a connecting front top platform and a connecting rear top platform, the connecting front top platform is correspondingly connected with the fastening front bottom plate, the connecting rear top platform is correspondingly connected with the fastening rear bottom plate, and the connecting lower groove and the fastening upper groove are in up-down lap joint to form a clamping groove to clamp the tank body.

The bottom of the tank body is provided with a left positioning column hole and a right positioning column hole, and the projection of the middle feed inlet on the bottom of the tank body is positioned between the left positioning column hole and the right positioning column hole; the middle part of connecting the lower recess is seted up down the drive post hole and is located left recess jack, right recess jack on its both sides, the left recess jack that corresponds respectively in the recess jack, right recess jack inserts and is provided with left locating pin, right locating pin, and the bottom of left locating pin, right locating pin all is located the inside of corresponding left recess jack, right recess jack, and the top of left locating pin, right locating pin all extends to the outside of corresponding left recess jack, right recess jack, and the top of left locating pin, right locating pin carries out the cooperation of inserting that corresponds with left locating post hole, right locating post hole.

The connecting bottom column comprises a frustum upper bottom column and a cylindrical lower bottom column, the large-diameter end of the frustum upper bottom column is connected with the bottom of the connecting top seat, and the small-diameter end of the frustum upper bottom column is connected with the top end of the cylindrical lower bottom column in an aligning manner.

The left inner nozzle and the right inner nozzle are consistent in structure; the left inner nozzle comprises an inner cylinder and an inner cone, the inner end of the inner cylinder is sleeved on the side wall of the outer end of the left cylinder, the outer end of the inner cylinder is connected with the large-diameter end of the inner cone, and the small-diameter end of the inner cone extends outwards;

the inner column body and the inner cone body are respectively provided with an inner column cavity and an inner cone cavity which are correspondingly arranged inside, and the inner cone cavity is communicated with the inner cavity of the left column.

The outer end of the left column body and the outer end of the right column body are consistent in structure; the outer end of the left column body comprises a narrow column body and a wide column body which are positioned outside the left surrounding column cavity, the diameter of the wide column body is larger than that of the narrow column body, the part of the left column body positioned in the left surrounding column cavity is connected with the inner end of the wide column body in an aligning way, the outer end of the wide column body is connected with the inner end of the narrow column body, and the outer end of the narrow column body extends outwards;

the inner column cavity is sleeved on the side wall of the narrow column body, the large-diameter end of the inner conical cavity is directly aligned and communicated with the inner cavity of the left column body, and the small-diameter end of the inner conical cavity is communicated with the left spray pipe after passing through the inner cavity of the left outer nozzle.

The left outer nozzle and the right outer nozzle are consistent in structure; the outer nozzle in a left side includes outer back cylinder, outer well cylinder, outer preceding cone, and outer back post chamber, outer well post chamber, the outer preceding cone chamber that sets up are corresponded to inside, the diameter in outer back post chamber is greater than the diameter in outer center post chamber, and outer back post chamber cup joints on the outside of the left end of jar body encloses, and the both ends in outer center post chamber communicate with the major diameter end that encloses post chamber, outer preceding cone chamber in a left side respectively mutually, and the minor diameter end in outer preceding cone chamber is linked together with the spray tube inner chamber, and the coaxial inside of locating left spray tube of spray tube inner chamber.

The left spray pipe and the right spray pipe are consistent in structure; the left spray pipe comprises a wide spray pipe column, a narrow spray pipe column, a wide spray pipe column cavity and a narrow spray pipe column cavity, wherein the wide spray pipe column and the narrow spray pipe column cavity are correspondingly arranged in the wide spray pipe column; the inner end of the wide spraying column cavity is communicated with the small-diameter end of the outer front cone cavity in an aligned mode, and the outer end of the wide spraying column cavity is communicated with the inner end of the narrow spraying column cavity in an aligned mode.

The reverse double-jet skin-core structure centrifugal spinning unit also comprises two yarn outlet needle tubes, and the single yarn outlet needle tube corresponds to the left outer nozzle or the right outer nozzle one by one; the silk discharging needle tube comprises a needle tube seat section, a needle tube waist section, a needle tube head section and a needle tube tip section which are connected in sequence, and a needle tube seat cavity, a needle tube waist cavity, a needle tube head cavity and a needle tube tip cavity which are correspondingly arranged in the silk discharging needle tube;

the needle tube seat cavity and the needle tube waist cavity are sequentially sleeved on the outer side periphery of the narrow nozzle column, the needle tube head section and the needle tube tip section are positioned outside the narrow nozzle column, and a nozzle gap is formed between the joint of the wide nozzle column and the narrow nozzle column and the needle tube seat section; the needle tube tip cavity is communicated with the narrow spraying column cavity through the needle tube head cavity.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention relates to a reverse double-jet skin-core structure centrifugal spinning unit, which mainly comprises a fastener, a connecting piece and a tank body, wherein a coaxial tank cavity is arranged inside the tank body, the middle part of the tank body is clamped between the fastener and the connecting piece, the left end and the right end of the tank body are respectively connected with a left outer nozzle and a right outer nozzle, the left end and the right end of the tank cavity are respectively communicated with the inner cavities of the left outer nozzle and the right outer nozzle, a left column body, a right column body and a middle cake body are arranged inside the tank body to form a left surrounding column cavity and a right surrounding column cavity, and a left column inner cavity, a right column inner cavity, a cake vertical cavity and a cake transverse cavity are arranged, so that the bottom of the cake vertical cavity is communicated with the middle part of the cake transverse cavity, the two ends of the cake transverse cavity are respectively communicated with the inner ends of the left column inner cavity and the right column inner cavity, the outer end of the left column inner cavity is sequentially communicated with a left spray pipe through the inner cavity of the left inner nozzle and the inner cavity of the left outer nozzle, the outer end of the inner cavity of the right column is communicated with the right spray pipe after passing through the inner cavity of the right inner nozzle and the inner cavity of the right outer nozzle in sequence, when in use, the same or different solutions (or melts) are introduced into the left column surrounding cavity, the cake vertical cavity and the right column surrounding cavity which correspond to the left feed inlet, the middle feed inlet and the right feed inlet, wherein the cake vertical cavity is introduced with a core solution, and the skin solution is introduced into the left column surrounding cavity and the right column surrounding cavity, in the spinning process, the fastening piece and the connecting piece are mutually matched to firmly clamp the tank body and drive the tank body to rotate so as to endow various solutions in the tank body with centrifugal force, so that each skin solution is wrapped outside the core solution and is sprayed out through the left nozzle and the right nozzle to obtain two types of spinning with skin-core structures in opposite directions, the two types of spinning can be the same or different and can be adjusted during collection, so as to obtain more layers of textile products, and has stronger adjustability and rich forms. Therefore, the invention not only has various product structures, but also has rich layers.

2. In the centrifugal spinning unit with the reverse bijection type skin-core structure, the fastening piece comprises a fastening middle top plate, a fastening front bottom plate and a fastening rear bottom plate, wherein the fastening front bottom plate and the fastening rear bottom plate are connected with two sides of the fastening middle top plate; meanwhile, the connecting piece comprises a connecting top seat and a connecting bottom column which are connected up and down, the middle part of the connecting top seat is provided with a connecting lower groove corresponding to the fastening upper groove, the parts of the connecting top seat positioned at the two sides of the connecting lower groove are respectively a connecting front top platform and a connecting rear top platform, during assembly, the connecting front top platform is correspondingly connected with the fastening front bottom plate, the connecting rear top platform is correspondingly connected with the fastening rear bottom plate, the connecting lower groove and the fastening upper groove are vertically overlapped to form a clamping groove for clamping the tank body, when in use, the design can ensure the fixation of the tank body during rotation, is beneficial to the smooth production of fibers of a skin core structure, is also convenient to be connected with an external infusion device, ensures the smooth realization of a rotation process and a liquid inlet process, and has simple structure, is beneficial to assembly and external observation and is convenient to maintain, particularly when two positioning column holes and two corresponding positioning pins are arranged, when inserting the cooperation, more do benefit to the location installation, also be convenient for observe the position of jar body in the rotation, avoid droing or dislocation. Therefore, the invention not only has stronger operation stability, but also is convenient for installation and maintenance.

3. In the reverse bijection type skin-core structure centrifugal spinning unit, the structures of the left inner nozzle and the right inner nozzle are consistent and comprise inner cylinders and inner cones, the inner ends of the inner cylinders are sleeved on the side walls of the outer ends of the left cylinders or the right cylinders, the outer ends of the inner cylinders are connected with the large-diameter end of each inner cone, and the small-diameter end of each inner cone extends outwards; simultaneously, the structure of left side outer nozzle, right side outer nozzle is unanimous, all include outer back cylinder, outer well cylinder, outer preceding cone, and the inside outer back post chamber of seting up that corresponds of it, outer well post chamber, outer preceding cone chamber, outer back post chamber cup joints on the outside of the left end of jar body or right-hand member encloses, the minor diameter end in outer preceding cone chamber is linked together with the spray tube inner chamber, and the coaxial inside of seting up in left spray tube of spray tube inner chamber, in the application, under the effect of centrifugal force, no matter be the kernel solution, or outsourcing solution, finally all outwards jets out from conical cavity, all experience a motion space compressed process, this process not only has the effect of speeding up, be convenient for solution filamentation, and can increase the skin, the fastness of combining between the core structure, promote the stability of final product. Therefore, the invention is not only beneficial to manufacturing products with rich structures, but also has stronger firmness of the products.

4. In the centrifugal spinning unit with the reverse double-jet skin-core structure, the structures of the outer end of a left cylinder and the outer end of a right cylinder are consistent, the centrifugal spinning unit comprises a narrow cylinder and a wide cylinder which are both positioned outside a left surrounding cylinder cavity, the part of the left cylinder positioned in the left surrounding cylinder cavity is aligned and connected with the inner end of the wide cylinder, the outer end of the wide cylinder is connected with the inner end of the narrow cylinder, when the centrifugal spinning unit is assembled, the inner cylinder cavity is sleeved on the side periphery of the narrow cylinder (preferably in threaded connection), the large diameter end of the inner cone cavity is directly aligned and communicated with the inner cavity of the left cylinder, the small diameter end of the inner cone cavity is communicated with a left spray pipe through the inner cavity of a left outer nozzle, and meanwhile, the structures of the left outer nozzle and a right outer nozzle are consistent, the centrifugal spinning unit comprises an outer rear cylinder, an outer middle cylinder and an outer front cone, and an outer rear cylinder cavity, an outer middle cylinder cavity and an outer front cone cavity which are correspondingly arranged inside of the outer rear cylinder cavity is sleeved on the outer periphery of the left end of a tank body (also preferably in threaded connection), the design can not only improve the firmness of the connected inner nozzle and the connected outer nozzle, but also does not need extra space occupation, thereby being convenient for assembly and operation. Therefore, the invention not only has stronger firmness, but also is easy to assemble.

5. The invention relates to a reverse double-injection type skin-core structure centrifugal spinning unit, which can be additionally provided with a silk outlet needle tube which is in one-to-one correspondence with a left outer nozzle or a right outer nozzle, wherein the silk outlet needle tube comprises a needle tube seat section, a needle tube waist section, a needle tube head section, a needle tube tip section, and a needle tube seat cavity, a needle tube waist cavity, a needle tube head cavity and a needle tube tip cavity which are connected in sequence, and are correspondingly arranged inside the needle tube seat section, the needle tube waist section, the needle tube tip section, and the needle tube seat cavity, the needle tube waist cavity, the needle tube head cavity and the needle tube tip cavity, when in use, the silk outlet needle tube not only has the effect of fixing the nozzle, but also can further compress a spinning solution and improve the silk forming quality, in addition, when a needle tube fixing piece is additionally arranged, the single needle tube fixing piece is in one-to-one correspondence with the single silk outlet needle tube, the needle tube fixing piece comprises a front fixing cone, a middle cone, a rear fixing cylinder, a rear cylinder fixing cavity and a rear cylinder cavity which are correspondingly arranged inside the needle tube waist section and a narrow cylinder fixing cavity, simultaneously, another part of needle tubing waist section, needle tubing head section, the narrow post of spray tube all are located solid well package intracavity in solid well post chamber, and this design not only can further strengthen the stability of nozzle, can prolong the distance of filamentation moreover to extra once more compression spinning solution promotes the filamentation quality, especially wraps the chamber after solid, the existence of solid well package chamber, increases the adjustability, in order to promote product quality. Therefore, the invention has the advantages of stronger stability and firmness in application, higher filament quality and stronger adjustability.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is an exploded view of the present invention.

Fig. 3 is a perspective view of the fastener of the present invention.

Fig. 4 is a perspective view of the connector of the present invention.

Fig. 5 is a top view of fig. 4.

Figure 6 is a cross-sectional view of the canister body of the present invention.

FIG. 7 is an enlarged view of the filament outlet needle cannula and needle cannula mount of FIG. 6.

Figure 8 is a cross-sectional view of the canister body of figure 6.

FIG. 9 is a schematic perspective view of the left outer nozzle and the left inner nozzle of the present invention in a half-section.

Fig. 10 is a schematic structural view of the outer left nozzle in the invention.

Fig. 11 is a schematic structural view of the left inner nozzle in the invention.

FIG. 12 is a schematic view of the structure of the needle cannula for discharging the filaments of the present invention.

Fig. 13 is a schematic structural view of the needle tube fixing member of the invention.

In the figure: an extended needle tube 1, a left outer nozzle 2, a right outer nozzle 20, a right nozzle 201, a left nozzle 21, a nozzle inner cavity 211, a nozzle wide column 212, a nozzle narrow column 213, a nozzle wide column cavity 214, a nozzle narrow column cavity 215, an outer rear cylinder 22, an outer rear cylinder cavity 221, an outer middle cylinder 23, an outer middle cylinder cavity 231, an outer front cone 24, an outer front cone cavity 241, an outer end interval cavity 25, a can body 3, a can body cavity 30, a left surrounding cylinder cavity 301, a right surrounding cylinder cavity 302, a nozzle interval cavity 303, a middle cake body 31, a cake vertical cavity 311, a cake transverse cavity 312, a middle feed inlet 313, a left feed inlet 314, a right feed inlet 315, a left cylinder 32, a left cylinder inner cavity 321, a narrow cylinder 322, a wide cylinder 323, a right cylinder 33, a right cylinder inner cavity 331, a left positioning cylinder hole 34, a right positioning cylinder hole 35, a left inner nozzle 4, a right inner nozzle 40, an inner cylinder 41, an inner cylinder cavity 411, an inner cylinder 42, an inner cone cavity 421, a silk outlet 5, a needle tube seat 51, a needle tube seat cavity 51, a needle tube seat cavity, a needle tube seat 11, a needle tube seat cavity, a needle tube, a cup cavity, The needle tube comprises a needle tube waist section 52, a needle tube waist cavity 521, a needle tube head section 53, a needle tube head cavity 531, a straight head column cavity 532, a conical head platform cavity 533, a needle tube tip section 54, a needle tube tip cavity 541, a nozzle gap 55, a needle tube fixing piece 6, a front fixing cone 61, a front fixing column cavity 611, a middle fixing cone 62, a middle fixing column cavity 621, a middle fixing column cavity 622, a rear fixing column 63, a rear fixing column cavity 631, a rear fixing column cavity 632, a fastening piece 7, a clamping groove 70, a middle fastening top plate 71, a front fastening bottom plate 72, a rear fastening bottom plate 73, a fastening insertion hole 74, an upper fastening groove 75, a connecting piece 8, a connecting top seat 81, a connecting bottom column 82, a conical table upper bottom column 821, a cylindrical lower bottom column 822, a connecting lower concave groove 83, a lower driving column hole 831, a connecting front top platform 84, a rear connecting top platform 85, a left groove insertion hole 86, a left positioning pin 861, a right groove insertion hole 87187 and a right positioning pin.

Detailed Description

The present invention will be described in further detail with reference to the following description and embodiments in conjunction with the accompanying drawings.

Referring to fig. 1-13, a centrifugal spinning unit with a reverse bijection type sheath-core structure comprises a tank body 3 with a coaxial tank body cavity 30 arranged inside, wherein the top of the tank body 3 is provided with a middle feeding hole 313 communicated with the tank body cavity 30, and the left end and the right end of the tank body cavity 30 are respectively communicated with inner cavities of a left outer nozzle 2 and a right outer nozzle 20;

the reverse bijection type skin-core structure centrifugal spinning unit further comprises a fastening piece 7 and a connecting piece 8, a left feeding hole 314, a middle feeding hole 313 and a right feeding hole 315 which are communicated with the tank body cavity 30 are sequentially formed in the top of the tank body 3, the middle of the tank body 3 is clamped between the fastening piece 7 and the connecting piece 8, and the left end and the right end of the tank body 3 are respectively connected with the left outer nozzle 2 and the right outer nozzle 20;

the inner part of the tank body 3 is provided with a middle cake body 31 which is vertical to the central axis of the tank body 3, the parts of the tank body 3, which are positioned at the two sides of the middle cake body 31, are a left surrounding column cavity 301 and a right surrounding column cavity 302 respectively, the inner parts of the left surrounding column cavity 301 and the right surrounding column cavity 302 are respectively and correspondingly provided with a left column body 32 and a right column body 33, the inner end of the left column body 32 is connected with the left side surface of the middle cake body 31, the outer end of the left column body 32 extends out of the left surrounding column cavity 301 and then is connected with a left inner nozzle 4, the inner end of the right column body 33 is connected with the right side surface of the middle cake body 31, the outer end of the right column body 33 extends out of the right surrounding column cavity 302 and then is connected with a right inner nozzle 40, and the height of the side part of the middle cake body 31 is larger than the diameters of the left column body 32 and the right column body 33; the left inner nozzle 4 is positioned inside the left outer nozzle 2, the right inner nozzle 40 is positioned inside the right outer nozzle 20, and nozzle separation cavities 303 are respectively clamped between the left inner nozzle 4 and the left outer nozzle 2 and between the right inner nozzle 40 and the right outer nozzle 20;

a cake vertical cavity 311 and a cake transverse cavity 312 are arranged inside the middle cake body 31, a left column inner cavity 321 and a right column inner cavity 331 are correspondingly arranged inside the left column body 32 and the right column body 33 respectively, the top of the cake vertical cavity 311 is communicated with the middle feeding hole 313, the bottom of the cake vertical cavity 311 is communicated with the middle of the cake transverse cavity 312, two ends of the cake transverse cavity 312 are respectively communicated with the inner ends of the left column inner cavity 321 and the right column inner cavity 331, the outer end of the left column inner cavity 321 is communicated with the left spray pipe 21 after sequentially passing through the inner cavity of the left inner nozzle 4 and the inner cavity of the left outer nozzle 2, and the outer end of the right column inner cavity 331 is communicated with the right spray pipe 201 after sequentially passing through the inner cavity of the right inner nozzle 40 and the inner cavity of the right outer nozzle 20;

the top of the left surrounding column cavity 301 is communicated with a left feeding hole 314 formed in the top of the tank body 3, the outer end of the left surrounding column cavity 301 is communicated with the left spray pipe 21 after passing through the inner cavity of the left outer nozzle 2, the top of the right surrounding column cavity 302 is communicated with a right feeding hole 315 formed in the top of the tank body 3, the outer end of the right surrounding column cavity 302 is communicated with the right spray pipe 201 after passing through the inner cavity of the right outer nozzle 20, and the middle feeding hole 313 is located between the left feeding hole 314 and the right feeding hole 315.

The part of the top of the left surrounding column cavity 301 close to the middle cake body 31 is communicated with a left feed inlet 314 formed in the top of the tank body 3, and the part of the top of the right surrounding column cavity 302 close to the middle cake body 31 is communicated with a right feed inlet 315 formed in the top of the tank body 3;

two liang of being parallel to each other of the axis in left side feed inlet 314, right feed inlet 315, the cake erects the chamber 311, the axis that the chamber 311 was erect to the cake is mutually perpendicular with the axis that the horizontal chamber 312 of cake, and the axis of left post inner chamber 321, the horizontal chamber 312 of cake, right post inner chamber 331 all is on same root straight line.

The fastening piece 7 comprises a fastening middle top plate 71, a fastening front bottom plate 72 and a fastening rear bottom plate 73 which are connected with two sides of the fastening middle top plate, the fastening front bottom plate 72 and the fastening rear bottom plate 73 are of L-shaped structures, a fastening insertion hole 74 which is opposite to the middle feeding hole 313 is formed in the middle of the fastening middle top plate 71, and the fastening front bottom plate 72, the fastening middle top plate 71 and the fastening rear bottom plate 73 are sequentially connected into a fastening upper groove 75;

the connecting piece 8 comprises a connecting top seat 81 and a connecting bottom column 82 which are connected up and down, a connecting lower groove 83 corresponding to the fastening upper groove 75 is formed in the middle of the connecting top seat 81, the positions, located on two sides of the connecting lower groove 83, of the connecting top seat 81 are respectively a connecting front top platform 84 and a connecting rear top platform 85, the connecting front top platform 84 is correspondingly connected with the fastening front bottom plate 72, the connecting rear top platform 85 is correspondingly connected with the fastening rear bottom plate 73, and the connecting lower groove 83 and the fastening upper groove 75 are in lap joint up and down to form a clamping groove 70 for clamping the tank body 3.

The bottom of the tank body 3 is provided with a left positioning column hole 34 and a right positioning column hole 35, and the projection of the middle feeding hole 313 on the bottom of the tank body 3 is positioned between the left positioning column hole 34 and the right positioning column hole 35; the middle part of connecting lower recess 83 has been seted up down drive post hole 831 and has been located left recess jack 86, right recess jack 87 on its both sides, the corresponding insertion is provided with left locating pin 861, right locating pin 871 respectively in left recess jack 86, the right recess jack 87, the bottom of left locating pin 861, right locating pin 871 all is located corresponding left recess jack 86, the inside of right recess jack 87, left locating pin 861, the top of right locating pin 871 all extends to corresponding left recess jack 86, the outside of right recess jack 87, and left locating pin 861, the top and left locating post hole 34 of right locating pin 871, right locating post hole 35 carries out corresponding insertion cooperation.

The connecting bottom pillar 82 comprises a frustum upper bottom pillar 821 and a cylindrical lower bottom pillar 822, wherein the large diameter end of the frustum upper bottom pillar 821 is connected with the bottom of the connecting top seat 81, and the small diameter end of the frustum upper bottom pillar 821 is connected with the top end of the cylindrical lower bottom pillar 822 in an aligning way.

The left inner nozzle 4 and the right inner nozzle 40 have the same structure; the left inner nozzle 4 comprises an inner cylinder 41 and an inner cone 42, the inner end of the inner cylinder 41 is sleeved on the side periphery of the outer end of the left cylinder 32, the outer end of the inner cylinder 41 is connected with the large-diameter end of the inner cone 42, and the small-diameter end of the inner cone 42 extends outwards;

the inner cylinder 41 and the inner cone 42 are respectively and correspondingly provided with an inner cylinder cavity 411 and an inner cone cavity 421, and the inner cone cavity 421 is communicated with the left cylinder inner cavity 321.

The outer end of the left column body 32 and the outer end of the right column body 33 are consistent in structure; the outer end of the left column 32 comprises a narrow column 322 and a wide column 323 which are both positioned outside the left surrounding column cavity 301, the diameter of the wide column 323 is larger than that of the narrow column 322, the part of the left column 32 positioned in the left surrounding column cavity 301 is connected with the inner end of the wide column 323 in an alignment way, the outer end of the wide column 323 is connected with the inner end of the narrow column 322, and the outer end of the narrow column 322 extends outwards;

the inner column cavity 411 is sleeved on the side wall of the narrow column body 322, the large diameter end of the inner cone cavity 421 is directly aligned and communicated with the left column inner cavity 321, and the small diameter end of the inner cone cavity 421 is communicated with the left spray pipe 21 through the inner cavity of the left outer nozzle 2.

The left outer nozzle 2 and the right outer nozzle 20 are consistent in structure; the left outer nozzle 2 comprises an outer rear cylinder 22, an outer middle cylinder 23, an outer front cone 24, an outer rear cylinder cavity 221, an outer middle cylinder cavity 231 and an outer front cone cavity 241, wherein the inner parts of the outer rear cylinder cavity 221, the outer middle cylinder cavity 231 and the outer front cone cavity 241 are correspondingly arranged, the diameter of the outer rear cylinder cavity 221 is larger than that of the outer middle cylinder cavity 231, the outer rear cylinder cavity 221 is sleeved on the outer side periphery of the left end of the tank body 3, two ends of the outer middle cylinder cavity 231 are respectively communicated with the large-diameter ends of the left surrounding cylinder cavity 301 and the outer front cone cavity 241, the small-diameter end of the outer front cone cavity 241 is communicated with the inner cavity 211 of the spray pipe, and the inner cavity 211 of the spray pipe is coaxially arranged in the left spray pipe 21.

The structures of the left spray pipe 21 and the right spray pipe 201 are consistent; the left spray pipe 21 comprises a wide spray pipe column 212, a narrow spray pipe column 213, a wide spray pipe column cavity 214 and a narrow spray pipe column cavity 215 which are correspondingly arranged in the wide spray pipe column 212, the inner end of the wide spray pipe column 212 is connected with the small-diameter end of the outer front cone 24, the outer end of the wide spray pipe column 212 is connected with the inner end of the narrow spray pipe column 213, and the outer end of the narrow spray pipe column 213 extends outwards; the inner end of the wide spraying column cavity 214 is communicated with the small diameter end of the outer front cone cavity 241 in an aligned mode, and the outer end of the wide spraying column cavity 214 is communicated with the inner end of the narrow spraying column cavity 215 in an aligned mode.

The reverse double-jet skin-core structure centrifugal spinning unit further comprises two yarn outlet needle tubes 5, and the single yarn outlet needle tube 5 corresponds to the left outer nozzle 2 or the right outer nozzle 20 one by one; the silk discharging needle tube 5 comprises a needle tube seat section 51, a needle tube waist section 52, a needle tube head section 53 and a needle tube tip section 54 which are connected in sequence, and a needle tube seat cavity 511, a needle tube waist cavity 521, a needle tube head cavity 531 and a needle tube tip cavity 541 which are correspondingly arranged in the needle tube seat section, the needle tube waist section 52, the needle tube head section 53 and the needle tube tip section 54;

the needle tube seat cavity 511 and the needle tube waist cavity 521 are sequentially sleeved on the outer side periphery of the narrow nozzle column 213, the needle tube head section 53 and the needle tube tip section 54 are both positioned outside the narrow nozzle column 213, and a nozzle gap 55 is clamped between the joint of the wide nozzle column 212 and the narrow nozzle column 213 and the needle tube seat section 51; the needle tube tip cavity 541 is communicated with the narrow nozzle column cavity 215 through the needle tube head cavity 531.

The principle of the invention is illustrated as follows:

the invention has three feeding holes in total for inputting spinning solution (or melt), namely a left feeding hole 314, a middle feeding hole 313 and a right feeding hole 315, wherein the left feeding hole 314 is communicated with a left surrounding column cavity 301 for inputting one outer coating solution, the right feeding hole 315 is communicated with a right surrounding column cavity 302 for inputting the other outer coating solution, a channel formed by a cake transverse cavity 312, a left column inner cavity 321 and a right column inner cavity 331 is communicated with the middle feeding hole 313 for inputting inner core solution, when the invention is applied, one inner core solution and the two outer coating solutions respectively cooperate to respectively form two skin-core spinning (the two skin-core spinning solutions have the same or different structures), the adjustability is stronger, the product structure is rich, and the invention is suitable for various requirements.

According to the invention, an outer end cavity 25 is preferably clamped between the small-diameter end of the outer front conical cavity 241 and the outer end of the left inner nozzle 4.

The preferred needle tube head cavity 531 comprises a straight head column cavity 532 and a conical head cavity 533, the large diameter end of the conical head cavity 533 is communicated with the narrow nozzle column cavity 215, the small diameter end of the conical head cavity 533 is aligned with the straight head column cavity 532, and the diameter of the large diameter end of the conical head cavity 533 is larger than that of the narrow nozzle column cavity 215.

The preferred reverse double-shot type skin-core structure centrifugal spinning unit further comprises two needle tube fixing pieces 6, and the single needle tube fixing piece 6 corresponds to the single yarn outlet needle tube 5 one by one; the needle tube fixing piece 6 comprises a front fixing cone 61, a middle fixing cone 62, a rear fixing column 63, a front fixing column cavity 611, a middle fixing column cavity 621 and a rear fixing column cavity 631 which are correspondingly arranged in the front fixing cone, the middle fixing cone 62 and the rear fixing column 63; the rear fixing column cavity 631 is sleeved on the outer side periphery of the nozzle wide column 212, and part of the needle tube waist section 52, part of the needle tube seat section 51 and part of the nozzle narrow column 213 are all positioned in a rear fixing wrapping cavity 632 in the rear fixing column cavity 631; the other part of the needle tube waist section 52, the needle tube head section 53 and the other part of the nozzle narrow column 213 are all positioned in a fixed middle packing cavity 622 in a fixed middle column cavity 621, and the needle tube tip section 54 is positioned in a fixed front column cavity 611; the needle tube tip section 54 is connected with the inner end of the extension needle tube 1, and the outer end of the extension needle tube 1 extends to the outside of the needle tube fixing piece 6 after passing through the anterior column fixing cavity 611.

Example 1:

referring to fig. 1-13, a reverse bijection type skin-core structure centrifugal spinning unit comprises a fastener 7, a connecting piece 8 and a tank body 3 with a tank body cavity 30 arranged coaxially therein, wherein a middle feed port 313 communicated with the tank body cavity 30 is formed in the top of the tank body 3, and the left end and the right end of the tank body cavity 30 are respectively communicated with inner cavities of a left outer nozzle 2 and a right outer nozzle 20; the top of the tank body 3 is sequentially provided with a left feed port 314, a middle feed port 313 and a right feed port 315 which are communicated with the tank body cavity 30, the middle part of the tank body 3 is clamped between the fastening piece 7 and the connecting piece 8, and the left end and the right end of the tank body 3 are respectively connected with the left outer nozzle 2 and the right outer nozzle 20; the inner part of the tank body 3 is provided with a middle cake body 31 which is vertical to the central axis of the tank body 3, the parts of the tank body 3, which are positioned at the two sides of the middle cake body 31, are a left surrounding column cavity 301 and a right surrounding column cavity 302 respectively, the inner parts of the left surrounding column cavity 301 and the right surrounding column cavity 302 are respectively and correspondingly provided with a left column body 32 and a right column body 33, the inner end of the left column body 32 is connected with the left side surface of the middle cake body 31, the outer end of the left column body 32 extends out of the left surrounding column cavity 301 and then is connected with a left inner nozzle 4, the inner end of the right column body 33 is connected with the right side surface of the middle cake body 31, the outer end of the right column body 33 extends out of the right surrounding column cavity 302 and then is connected with a right inner nozzle 40, and the height of the side part of the middle cake body 31 is larger than the diameters of the left column body 32 and the right column body 33; the left inner nozzle 4 is positioned inside the left outer nozzle 2, the right inner nozzle 40 is positioned inside the right outer nozzle 20, and nozzle separation cavities 303 are respectively clamped between the left inner nozzle 4 and the left outer nozzle 2 and between the right inner nozzle 40 and the right outer nozzle 20; a cake vertical cavity 311 and a cake transverse cavity 312 are arranged inside the middle cake body 31, a left column inner cavity 321 and a right column inner cavity 331 are correspondingly arranged inside the left column body 32 and the right column body 33 respectively, the top of the cake vertical cavity 311 is communicated with the middle feeding hole 313, the bottom of the cake vertical cavity 311 is communicated with the middle of the cake transverse cavity 312, two ends of the cake transverse cavity 312 are respectively communicated with the inner ends of the left column inner cavity 321 and the right column inner cavity 331, the outer end of the left column inner cavity 321 is communicated with the left spray pipe 21 after sequentially passing through the inner cavity of the left inner nozzle 4 and the inner cavity of the left outer nozzle 2, and the outer end of the right column inner cavity 331 is communicated with the right spray pipe 201 after sequentially passing through the inner cavity of the right inner nozzle 40 and the inner cavity of the right outer nozzle 20; the top of the left surrounding column cavity 301 is communicated with a left feeding hole 314 formed in the top of the tank body 3, the outer end of the left surrounding column cavity 301 is communicated with the left spray pipe 21 after passing through the inner cavity of the left outer nozzle 2, the top of the right surrounding column cavity 302 is communicated with a right feeding hole 315 formed in the top of the tank body 3, the outer end of the right surrounding column cavity 302 is communicated with the right spray pipe 201 after passing through the inner cavity of the right outer nozzle 20, and the middle feeding hole 313 is located between the left feeding hole 314 and the right feeding hole 315.

Example 2:

the basic contents are the same as example 1, except that:

the fastening piece 7 comprises a fastening middle top plate 71, a fastening front bottom plate 72 and a fastening rear bottom plate 73 which are connected with two sides of the fastening middle top plate, the fastening front bottom plate 72 and the fastening rear bottom plate 73 are of L-shaped structures, a fastening insertion hole 74 which is opposite to the middle feeding hole 313 is formed in the middle of the fastening middle top plate 71, and the fastening front bottom plate 72, the fastening middle top plate 71 and the fastening rear bottom plate 73 are sequentially connected into a fastening upper groove 75; the connecting piece 8 comprises a connecting top seat 81 and a connecting bottom column 82 which are connected up and down, a connecting lower groove 83 corresponding to the fastening upper groove 75 is formed in the middle of the connecting top seat 81, the positions, located on two sides of the connecting lower groove 83, of the connecting top seat 81 are respectively a connecting front top platform 84 and a connecting rear top platform 85, the connecting front top platform 84 is correspondingly connected with the fastening front bottom plate 72, the connecting rear top platform 85 is correspondingly connected with the fastening rear bottom plate 73, and the connecting lower groove 83 and the fastening upper groove 75 are in lap joint up and down to form a clamping groove 70 for clamping the tank body 3.

Preferably, the bottom of the tank body 3 is provided with a left positioning column hole 34 and a right positioning column hole 35, and the projection of the middle feed port 313 on the bottom of the tank body 3 is positioned between the left positioning column hole 34 and the right positioning column hole 35; the middle part of connecting lower recess 83 has been seted up down drive post hole 831 and has been located left recess jack 86, right recess jack 87 on its both sides, the corresponding insertion is provided with left locating pin 861, right locating pin 871 respectively in left recess jack 86, the right recess jack 87, the bottom of left locating pin 861, right locating pin 871 all is located corresponding left recess jack 86, the inside of right recess jack 87, left locating pin 861, the top of right locating pin 871 all extends to corresponding left recess jack 86, the outside of right recess jack 87, and left locating pin 861, the top and left locating post hole 34 of right locating pin 871, right locating post hole 35 carries out corresponding insertion cooperation.

Example 3:

the basic contents are the same as example 1, except that:

the left inner nozzle 4 and the right inner nozzle 40 have the same structure; the left inner nozzle 4 comprises an inner cylinder 41 and an inner cone 42, the inner end of the inner cylinder 41 is sleeved on the side periphery of the outer end of the left cylinder 32, the outer end of the inner cylinder 41 is connected with the large-diameter end of the inner cone 42, and the small-diameter end of the inner cone 42 extends outwards; the inner cylinder 41 and the inner cone 42 are respectively and correspondingly provided with an inner cylinder cavity 411 and an inner cone cavity 421, and the inner cone cavity 421 is communicated with the left cylinder inner cavity 321. The outer end of the left column body 32 and the outer end of the right column body 33 are consistent in structure; the outer end of the left column 32 comprises a narrow column 322 and a wide column 323 which are both positioned outside the left surrounding column cavity 301, the diameter of the wide column 323 is larger than that of the narrow column 322, the part of the left column 32 positioned in the left surrounding column cavity 301 is connected with the inner end of the wide column 323 in an alignment way, the outer end of the wide column 323 is connected with the inner end of the narrow column 322, and the outer end of the narrow column 322 extends outwards; the inner column cavity 411 is sleeved on the side wall of the narrow column body 322, the large diameter end of the inner cone cavity 421 is directly aligned and communicated with the left column inner cavity 321, and the small diameter end of the inner cone cavity 421 is communicated with the left spray pipe 21 through the inner cavity of the left outer nozzle 2.

Example 4:

the basic contents are the same as example 3, except that:

the left outer nozzle 2 and the right outer nozzle 20 are consistent in structure; the left outer nozzle 2 comprises an outer rear cylinder 22, an outer middle cylinder 23, an outer front cone 24, an outer rear cylinder cavity 221, an outer middle cylinder cavity 231 and an outer front cone cavity 241, wherein the inner parts of the outer rear cylinder cavity 221, the outer middle cylinder cavity 231 and the outer front cone cavity 241 are correspondingly arranged, the diameter of the outer rear cylinder cavity 221 is larger than that of the outer middle cylinder cavity 231, the outer rear cylinder cavity 221 is sleeved on the outer side periphery of the left end of the tank body 3, two ends of the outer middle cylinder cavity 231 are respectively communicated with the large-diameter ends of the left surrounding cylinder cavity 301 and the outer front cone cavity 241, the small-diameter end of the outer front cone cavity 241 is communicated with the inner cavity 211 of the spray pipe, and the inner cavity 211 of the spray pipe is coaxially arranged in the left spray pipe 21. The structures of the left spray pipe 21 and the right spray pipe 201 are consistent; the left spray pipe 21 comprises a wide spray pipe column 212, a narrow spray pipe column 213, a wide spray pipe column cavity 214 and a narrow spray pipe column cavity 215 which are correspondingly arranged in the wide spray pipe column 212, the inner end of the wide spray pipe column 212 is connected with the small-diameter end of the outer front cone 24, the outer end of the wide spray pipe column 212 is connected with the inner end of the narrow spray pipe column 213, and the outer end of the narrow spray pipe column 213 extends outwards; the inner end of the wide spraying column cavity 214 is communicated with the small diameter end of the outer front cone cavity 241 in an aligned mode, and the outer end of the wide spraying column cavity 214 is communicated with the inner end of the narrow spraying column cavity 215 in an aligned mode.

Example 5:

the basic contents are the same as example 3, except that:

the reverse double-jet skin-core structure centrifugal spinning unit further comprises two yarn outlet needle tubes 5, and the single yarn outlet needle tube 5 corresponds to the left outer nozzle 2 or the right outer nozzle 20 one by one; the silk discharging needle tube 5 comprises a needle tube seat section 51, a needle tube waist section 52, a needle tube head section 53 and a needle tube tip section 54 which are connected in sequence, and a needle tube seat cavity 511, a needle tube waist cavity 521, a needle tube head cavity 531 and a needle tube tip cavity 541 which are correspondingly arranged in the needle tube seat section, the needle tube waist section 52, the needle tube head section 53 and the needle tube tip section 54; the needle tube seat cavity 511 and the needle tube waist cavity 521 are sequentially sleeved on the outer side periphery of the narrow nozzle column 213, the needle tube head section 53 and the needle tube tip section 54 are both positioned outside the narrow nozzle column 213, and a nozzle gap 55 is clamped between the joint of the wide nozzle column 212 and the narrow nozzle column 213 and the needle tube seat section 51; the needle tube tip cavity 541 is communicated with the narrow nozzle column cavity 215 through the needle tube head cavity 531.

The above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiment, but equivalent modifications or changes made by those skilled in the art according to the present disclosure should be included in the scope of the present invention as set forth in the appended claims.