阅读说明：本技术 一种竖排螺旋轴的叠片螺旋式固液分离机 (Laminated spiral solid-liquid separator of vertical spiral shaft ) 是由 辛蓉 于 2021-07-22 设计创作，主要内容包括：一种竖排螺旋轴的叠片螺旋式固液分离机,包括：过滤腔体、螺旋轴、驱动装置、和多个支撑板；过滤腔体、螺旋轴和驱动装置通过所述多个支撑板进行支撑定位；螺旋轴贯穿于过滤腔体中；所述螺旋轴为两根或两根以上,并且自上而下竖直排列设置于所述过滤腔体内；相邻的两所述螺旋轴的螺旋叶片相互嵌入；所述第一闭合环片组和所述第二闭合环片组中的每个环片形状与竖直排列的所述螺旋轴的外形相匹配。本发明螺旋轴竖排的设计使得固液分离机的占地面积较小,可并排设计多台脱水机,大大提高空间利用率,增大了过滤腔体两侧的过水通道面积,使得滤水及时排出,提高工作效率。(A laminated spiral solid-liquid separator of a vertical screw shaft comprises: the spiral screw shaft is arranged in the filtering cavity; the filtering cavity, the spiral shaft and the driving device are supported and positioned through the plurality of supporting plates; the spiral shaft penetrates through the filtering cavity; the two or more spiral shafts are vertically arranged in the filtering cavity from top to bottom; the spiral blades of two adjacent spiral shafts are embedded into each other; the shape of each ring piece in the first closed ring piece group and the second closed ring piece group is matched with the shape of the spiral shaft which is vertically arranged. The vertical arrangement design of the spiral shaft ensures that the solid-liquid separator occupies a smaller area, a plurality of dewaterers can be arranged side by side, the space utilization rate is greatly improved, the water passing channel areas on two sides of the filtering cavity are increased, filtered water is discharged in time, and the working efficiency is improved.)

1. The utility model provides a spiral solid-liquid separation machine of lamination of vertical row screw axis which characterized in that: the method comprises the following steps: the spiral screw shaft is arranged in the filtering cavity;

the filtering cavity, the spiral shaft and the driving device are supported and positioned through the plurality of supporting plates;

the spiral shaft penetrates through the filtering cavity;

the two ends of the filtering cavity are respectively a feeding end and a discharging end;

the method is characterized in that: the filter chamber body, includes: at least two closed ring sets, the two closed ring sets include: the first closed ring plate group and the second closed ring plate group with inconsistent motion state; in the two groups of closed ring groups, a gasket is arranged between two adjacent closed ring sheets of at least one group of closed ring groups, and the thickness of the gasket is greater than that of the other group of closed ring sheets, so that a filtering gap is formed between the adjacent closed ring sheets;

the first closed ring plate group moves under the driving of the driving device, and the second closed ring plate group is connected to the supporting plate and keeps fixed or moves relative to the first closed ring plate group under the driving of the driving device, so that a filtering gap is kept unobstructed;

the two or more spiral shafts are vertically arranged in the filtering cavity from top to bottom; the spiral blades of two adjacent spiral shafts are embedded into each other; the shape of each ring piece in the first closed ring piece group and the second closed ring piece group is matched with the shape of the spiral shaft which is vertically arranged.

2. The laminated screw type solid-liquid separator of a vertical screw shaft according to claim 1, wherein: the upper half part of the supporting plate at the feeding end at the tail part of the filtering cavity is connected with a cylindrical feeding box, and a feeding hole is formed in the feeding box;

the tail end of the spiral shaft positioned at the uppermost position extends into the feeding box, and the spiral shaft section in the feeding box is characterized in that: a baffle plate is arranged between the starting point and the end point of a first spiral blade from the tail end of the spiral shaft to divide the spiral shaft into two areas, one side edge of the baffle plate is connected with the central shaft of the spiral shaft, and the other side edge of the baffle plate is attached to the wall of the cylindrical feeding box to form sealing; the outer edge of the first spiral blade is attached to the inner wall of the cylindrical feeding box; the distance from the starting point to the end point of the first spiral blade is greater than the axial width of the feeding hole of the feeding box;

the tail end of the spiral shaft positioned at the lower part is arranged on a supporting plate shaft sleeve at the tail part of the filtering cavity.

3. The laminated screw type solid-liquid separator of a vertical screw shaft according to claim 2, wherein: the baffle of the spiral shaft section in the feeding box rotates along with the spiral shaft, the advancing direction of the propelling material is the front side, otherwise, the back side, the front side of the baffle faces the normal rotating direction of the spiral shaft, and the area formed between the back side of the baffle and the end point to the starting point of the first spiral blade is of a columnar structure and is attached to the inner wall of the box body of the cylindrical feeding box.

4. The laminated screw type solid-liquid separator of a vertical screw shaft according to claim 1, wherein: the upper half part of the support frame at the feeding end at the tail part of the filtering cavity is connected with a screw pump;

the tail end of the screw shaft positioned at the uppermost part is arranged on a flange plate at the tail end of the filtering cavity; the flange plate is of a hollow structure, and one end of the screw pump is connected to the flange plate; the materials enter from a feed inlet of the screw pump and pass through the flange plate to enter the filter cavity through the conveying of the screw pump;

the tail end of the spiral shaft positioned at the lower part is arranged on a shaft sleeve of a supporting plate at the tail end of the filtering cavity.

5. The laminated screw type solid-liquid separator of a vertical screw shaft according to claim 1, wherein: the driving device includes:

comprises a main driving rod, an auxiliary driving rod and a positioning rod;

the main driving rod is connected with an independent driving motor or is connected with the spiral shaft through a transmission mechanism;

the main driving rod is supported by the plurality of supporting plates; one or more eccentric devices are also arranged on the main driving rod;

the main driving rod is positioned above the auxiliary driving rod; each eccentric device is connected with the auxiliary driving rod through a driving sheet; the auxiliary driving rod is sleeved at the upper end of the first closed ring plate group; the lower end of the first closed ring piece group penetrates through the positioning rod to connect all the first closed ring piece groups into a whole;

the transmission mechanism or the driving motor drives the main driving rod to move, the eccentric device on the main driving rod drives the auxiliary driving rod to move in the abdicating hole in the supporting plate in a reciprocating circular motion mode, and drives the positioning rod to move in a reciprocating up-and-down linear motion mode in the linear limiting hole of the supporting plate, so that the upper end of the first closed ring piece group is driven to move in a reciprocating circular motion mode, and the lower end of the first closed ring piece group is driven to move in a reciprocating up-and-down linear motion mode.

6. The laminated screw type solid-liquid separator of a vertical screw shaft according to claim 1, wherein: the inner profile of each ring segment in the first and second closed ring segment sets has a protrusion and a groove.

7. The laminated screw type solid-liquid separator of a vertical screw shaft according to claim 1, wherein: the discharge end of the filtering cavity is provided with a sealing plate for sealing, the sealing plate is connected with a discharge pipeline, and a valve for controlling discharge is arranged on the discharge pipeline.

Technical Field

The invention belongs to the technical field of solid-liquid separators, and particularly relates to a lamination screw separation type solid-liquid separator of a vertical screw shaft.

Background

Chinese patent 200510054707.1 (reference 1) discloses a non-wear laminated spiral solid-liquid separator, in which fixed rings and movable rings are laminated together to form a cavity structure, a screw shaft penetrates through the fixed rings, the movable rings move up and down by external driving, and for some materials with high fiber content and easy hardening, the screw shaft is easily embraced by the materials, which affects smooth advance of the materials, and causes reduction of the processing capacity and easy overload or mechanical failure. And the material close to the axis has a longer moisture discharge channel, so that the moisture content can not be further reduced.

Chinese patent 201710239689.7 (reference 2) discloses a multi-shaft laminated spiral solid-liquid separator with pendulum motion, which uses two or more spiral shafts instead of one spiral shaft, the spiral shafts are designed side by side, and a fixed ring and a movable ring are tightly attached to the periphery of the spiral shafts, so that the whole chamber is flat, the water filtering area at the bottom is increased, and the water is discharged. However, the technical solution of the side-by-side (horizontal) design of the screw shafts has the following disadvantages: 1. because the screw shaft and the feeding box are not sealed, continuous positive pressure cannot be generated, when the resistance of the material advancing in the cavity is too large, the subsequent material advances slowly or even cannot advance continuously, the treatment capacity of the material cannot be improved, the pressure cannot be accumulated in the cavity to reduce the water content, and even the material can be blocked in the cavity. 2. The screw shafts are arranged side by side, so that the floor area of the dehydrator is larger. 3. The water passing channels on the two sides of the filtering cavity are fewer, and the water filtering is not smooth enough. 4. The two transverse sides of the closed ring sheet are wider, the supporting force is weaker, and the closed ring sheet is easy to deform or even break.

Chinese utility model patent 201921703557.6 (reference 3) discloses a reciprocating laminated spiral solid-liquid separator and a mixing tank, which also adopts a scheme in which two spiral shafts are designed side by side, and still has the disadvantages of reference 2.

Chinese patent 201710240104.3 (reference 4) discloses a laminated spiral solid-liquid separator with torsional pendulum motion, and in a specific embodiment, the present invention also relates to a scheme in which two spiral shafts are designed side by side, which still has the disadvantages of reference 2.

Disclosure of Invention

The invention aims to solve the technical problem of providing a stacked spiral type solid-liquid separator of a vertical spiral shaft, which has more reasonable structural design and higher working efficiency.

The invention is realized by the following steps:

a laminated spiral solid-liquid separator of a vertical screw shaft comprises: the spiral screw shaft is arranged in the filtering cavity;

the filtering cavity, the spiral shaft and the driving device are supported and positioned through the plurality of supporting plates;

the spiral shaft penetrates through the filtering cavity;

the two ends of the filtering cavity are respectively a feeding end and a discharging end;

the filter chamber body, includes: at least two closed ring sets, the two closed ring sets include: the first closed ring plate group and the second closed ring plate group with inconsistent motion state; in the two groups of closed ring groups, a gasket is arranged between two adjacent closed ring sheets of at least one group of closed ring groups, and the thickness of the gasket is greater than that of the other group of closed ring sheets, so that a filtering gap is formed between the adjacent closed ring sheets;

the first closed ring plate group moves under the driving of the driving device, and the second closed ring plate group is connected to the supporting plate and keeps fixed or moves relative to the first closed ring plate group under the driving of the driving device, so that a filtering gap is kept unobstructed;

the two or more spiral shafts are vertically arranged in the filtering cavity from top to bottom; the spiral blades of two adjacent spiral shafts are embedded into each other; the shape of each ring piece in the first closed ring piece group and the second closed ring piece group is matched with the shape of the spiral shaft which is vertically arranged.

Furthermore, the upper half part of the supporting plate at the feeding end at the tail part of the filtering cavity is connected with a cylindrical feeding box, and a feeding hole is formed in the feeding box;

the tail end of the spiral shaft positioned at the uppermost position extends into the feeding box, and the spiral shaft section in the feeding box is characterized in that: a baffle plate is arranged between the starting point and the end point of a first spiral blade from the tail end of the spiral shaft to divide the spiral shaft into two areas, one side edge of the baffle plate is connected with the central shaft of the spiral shaft, and the other side edge of the baffle plate is attached to the wall of the cylindrical feeding box to form sealing; the outer edge of the first spiral blade is attached to the inner wall of the cylindrical feeding box; the distance from the starting point to the end point of the first spiral blade is greater than the axial width of the feeding hole of the feeding box;

the tail end of the spiral shaft positioned at the lower part is arranged on a supporting plate shaft sleeve at the tail part of the filtering cavity.

Furthermore, the baffle of the spiral shaft section in the feeding box rotates along with the spiral shaft, the advancing direction of the propelling material is the front side, otherwise, the back side, the front side of the baffle faces the normal rotating direction of the spiral shaft, and the area formed between the back side of the baffle and the end point to the starting point of the first spiral blade is of a columnar structure, so that the baffle is attached to the inner wall of the box body of the cylindrical feeding box.

Furthermore, the upper half part of the support frame at the feeding end of the tail part of the filtering cavity is connected with a screw pump;

the tail end of the screw shaft positioned at the uppermost part is arranged on a flange plate at the tail end of the filtering cavity; the flange plate is of a hollow structure, and one end of the screw pump is connected to the flange plate; the materials enter from a feed inlet of the screw pump and pass through the flange plate to enter the filter cavity through the conveying of the screw pump;

the tail end of the spiral shaft positioned at the lower part is arranged on a shaft sleeve of a supporting plate at the tail end of the filtering cavity.

Further, the driving device includes:

comprises a main driving rod, an auxiliary driving rod and a positioning rod;

the main driving rod is connected with an independent driving motor or is connected with the spiral shaft through a transmission mechanism;

the main driving rod is supported by the plurality of supporting plates; one or more eccentric devices are also arranged on the main driving rod;

the main driving rod is positioned above the auxiliary driving rod; each eccentric device is connected with the auxiliary driving rod through a driving sheet; the auxiliary driving rod is sleeved at the upper end of the first closed ring plate group; the lower end of the first closed ring piece group penetrates through the positioning rod to connect all the first closed ring piece groups into a whole;

the transmission mechanism or the driving motor drives the main driving rod to move, the eccentric device on the main driving rod drives the auxiliary driving rod to move in the abdicating hole in the supporting plate in a reciprocating circular motion mode, and drives the positioning rod to move in a reciprocating up-and-down linear motion mode in the linear limiting hole of the supporting plate, so that the upper end of the first closed ring piece group is driven to move in a reciprocating circular motion mode, and the lower end of the first closed ring piece group is driven to move in a reciprocating up-and-down linear motion mode.

Further, the inner contour of each ring segment in the first closed ring segment set and the second closed ring segment set has a protrusion and a groove.

Furthermore, the discharge end of the filtering cavity is provided with a sealing plate for sealing, the sealing plate is connected with a discharge pipeline, and a valve for controlling discharge is arranged on the discharge pipeline.

The invention has the advantages that: 1. the screw shaft section in the feeding box at the tail end of the screw shaft above is structurally improved, or the screw pump is connected to the tail end of the screw shaft above, so that continuous positive pressure is generated in the filter cavity, the material continuously moves to the discharge end, and the work is smoother. 2. The vertical arrangement design of the spiral shaft enables the solid-liquid separator to occupy a small area, a plurality of dewaterers can be arranged side by side, and the space utilization rate is greatly improved. 3. The area of the water passing channel on the two sides of the filtering cavity is increased, so that filtered water is discharged in time, and the working efficiency is improved. 4. Because the inner circle of the ring piece adopts the design of the discontinuous groove, the inner wall of the cavity forms an unsmooth structure, the materials are prevented from rotating along with the screw shaft, the materials are more easily pushed forwards, and the treatment capacity is improved. 5. Because the continuous positive pressure is arranged in the filter cavity, the discharge end is sealed by the seal plate, so that pressure accumulation can be generated, the moisture content of materials in the filter cavity is further reduced, and when the materials need to be discharged, the materials can be discharged by opening the discharge pipe valve on the seal plate; the discharge end adopts the shrouding to add the valve mode, compares in prior art's back pressure board mode, and structure and operation are simple and convenient more. 6. The driving devices such as the main driving rod and the eccentric bearing are arranged at the top of the filtering cavity, so that the driving devices can be prevented from being eroded by filtrate for a long time, the failure rate of the driving devices is further reduced, the service life of the driving devices is prolonged, and the observation, the maintenance and the repair are convenient.

Drawings

The invention will be further described with reference to the following examples with reference to the accompanying drawings.

Fig. 1 is a front view of a first embodiment of the present invention.

Fig. 2 is a top view of the first embodiment of the present invention.

Fig. 3 is a right side view of the first embodiment of the present invention.

FIG. 4 is a schematic view of a first closure ring segment of the present invention.

Fig. 5 is an enlarged schematic view of a portion a in fig. 4.

FIG. 6 is a schematic view of a second closure ring segment of the present invention.

Fig. 7 is an enlarged schematic view of a portion B of fig. 6.

Fig. 8 is a schematic structural view of the driving movable ring plate in the first closed ring plate group of the invention.

Fig. 9 is an enlarged schematic view of the portion C of fig. 8.

Fig. 10 is a schematic structural view of the support plate of the present invention.

Fig. 11 is a schematic view of the screw axis structure of the first embodiment of the present invention.

Fig. 12 is a front view of a second embodiment of the present invention.

Fig. 13 is a top view of a second embodiment of the present invention.

Fig. 14 is a schematic view of the structure of the screw axis located above in the second embodiment of the present invention.

Fig. 15 is a schematic view of the structure of the screw axis located above in the third embodiment of the present invention.

Fig. 16 is a front view of a fourth embodiment of the present invention.

Fig. 17 is a top view of a fourth embodiment of the present invention.

Fig. 18 is a sectional view a-a of fig. 17.

Detailed Description

The first embodiment:

as shown in fig. 1 to 11, a laminated screw type solid-liquid separator of a vertical screw shaft includes: a filtering cavity 1, a screw shaft 2, a driving device 3 and a plurality of supporting plates 4.

The filtering cavity 1, the screw shaft 2 and the driving device 3 are supported and positioned by a plurality of supporting plates 4; the spiral shaft 2 penetrates through the filtering cavity 1; the two ends of the filtering cavity 1 are respectively a feeding end 11 and a discharging end 12.

The filtering chamber 1 comprises two closed ring sets, a first closed ring set 13 moves under the drive of the driving device 3, and a second closed ring set 14 is connected to the support plate 4 and keeps fixed. A gasket (not shown) is arranged between two adjacent closed ring sheets of the second closed ring sheet set 14, and the thickness of the gasket is greater than that of the first closed ring sheet 13, so that a filtering gap is formed between the adjacent first closed ring sheet 13 and the second closed ring sheet 14.

The two spiral shafts 2 are vertically arranged in the filtering cavity 1 from top to bottom; the helical blades of the two helical shafts 2 are embedded into each other; each ring piece shape in the first closed ring piece group 13 and the second closed ring piece group 14 is matched with the shape of the two screw shafts which are vertically arranged. The inner contour of each ring plate in the first closed ring plate group 13 and the second closed ring plate group 14 is provided with a protrusion and a groove, and the materials are subjected to the resistance of the inner wall of the filtering cavity 1 in the process of being driven by the screw shaft 2, so that the materials are easier to push forwards. The pitch of the screw shaft 2 decreases gradually from the feed end 11 to the discharge end 12. In particular practice, the number of screw shafts 2 may be two or more.

In the present embodiment, the driving device 3 includes: a main driving rod 31, a sub driving rod 32, a positioning rod 33, a driving motor 30, etc.

The driving motor 30 drives the screw shaft 2 to rotate, and the screw shaft 2 drives the main driving rod 31 to rotate through a transmission mechanism 34, wherein the transmission mechanism 34 can be a gear transmission, a chain wheel transmission or a belt transmission. The main driving rod 31 may be additionally connected to a separate driving motor for driving, and is not necessarily driven by the driving motor 30 driving the screw shaft 2 through the transmission mechanism 34.

The main driving rod 31 is positioned above the filtering cavity 1 and is supported by a plurality of supporting plates 4, and a plurality of eccentric bearings 35 are arranged on the main driving rod 31 at intervals;

the main driving rod 31 is located above the auxiliary driving rod 32, each eccentric bearing 35 is connected to the auxiliary driving rod 32 through a driving plate 36, the auxiliary driving rod 32 is sleeved on the upper end of the first closed ring piece 13, and the lower end of the first closed ring piece set 13 penetrates through the positioning rod 33 to connect all the first closed ring piece sets 13 into a whole. The driving plate 36 is connected with the first closed ring plate 13 into a whole, and the first closed ring plate 13 with the driving plate 36 is called a transmission movable ring plate 131.

The support plate 4 is provided with a linear limiting hole 41, an abdicating hole 42, a support post hole 43 for connecting the second closed ring group 14, a cavity hole 44 for accommodating the filtering cavity 1, and a fixing hole 45 for fixing the main driving rod 31.

The transmission mechanism 34 drives the main driving rod 31 to move, the eccentric device 35 on the main driving rod 31 drives the auxiliary driving rod 32 to make reciprocating circular motion in the abdicating hole 42 on the supporting plate 4, the auxiliary driving rod 32 drives the transmission movable ring piece 131 to move, the transmission movable ring piece 131 drives all the first closed ring pieces 13 to make motion, and further drives the positioning rod 33 to make reciprocating up-and-down linear motion in the linear limiting hole 41 of the supporting plate 4, so that the upper end of the first closed ring piece group 13 makes reciprocating circular motion, and the lower end of the first closed ring piece group 13 makes reciprocating up-and-down linear motion.

In a specific practice, the movement mode of the first closed ring group 13 is not limited to the above-mentioned movement mode, and may be other modes, for example, the whole up-and-down linear movement in the reference 1, the one end linear movement and the other end pendulum movement in the reference 2, the whole reciprocating circular movement in the reference 3, the torsional movement in the reference 4, and the like.

The working process is as follows: the material enters the filtering cavity 1 through the feeding hole 51 of the feeding box 5 and is continuously pushed forward by the upper and lower screw shafts in the filtering cavity 1, and even if the material is contacted with the material which is easy to wind and harden, the material can be smoothly pushed forward without resistance due to mutual scraping between the two screw shafts. In the process of conveying materials, the filtering cavity 1 moves with the adjacent closed ring pieces due to the movement of the first closed ring piece group 13, so that the filtering seams are kept smooth, filtrate can be discharged outwards from the inside of the filtering cavity 1 through the filtering seams, and filter residues are discharged from the discharge end.

Second embodiment:

as shown in fig. 12 to 14, in the present embodiment, the upper half of the supporting plate 4 of the feeding end 11 at the tail of the filtering chamber 1 is connected with a cylindrical feeding box 5, the end of the screw shaft 2 located above extends into the cylindrical feeding box 5, and the screw shaft section in the feeding box is characterized in that: a baffle 6 is arranged between the starting point 211 and the end point 212 of the first spiral blade 21 from the tail end of the spiral shaft 2 to divide the spiral shaft 2 into two areas, one side of the baffle 6 is connected with the central shaft of the spiral shaft 2, and the other side is attached to the wall of the cylindrical feeding box 5 to form a seal; the outer edge of the first helical blade 21 is attached to the inner wall of the cylindrical feeding box 5; the distance from the starting point 211 to the end point 212 of the first helical blade 21 is greater than the axial width of the feed opening 51 of the feed box 5. The tail end of the screw shaft 2 positioned at the lower part is arranged on a shaft sleeve of a supporting plate 4 at the tail part of the filtering cavity 1.

The discharge end 12 of the filtering cavity 1 is provided with a sealing plate 71 for sealing, the sealing plate 71 is connected with a discharge pipeline 72, and the discharge pipeline 72 is provided with a valve 73 for controlling discharge.

The working process is as follows: materials enter the filtering cavity 1 through the feeding hole of the cylindrical feeding box 5 and are continuously pushed forward by the upper screw shaft 2 and the lower screw shaft 2 in the filtering cavity 1, and even if the materials which are easy to wind and harden are touched, the materials can be smoothly pushed forward without resistance due to mutual scraping between the two screw shafts 2. In-process that the material was carried, filter chamber 1 produces the displacement with adjacent closed ring piece because the motion of first closed ring piece group 13, let strain the seam and keep unobstructed, filtrating just can outwards discharge from filter chamber 1 inside through straining the seam, baffle 6 in the feeding case 5 makes the material produce continuous forward pressure, the material after being dehydrated reachs discharge end 12, and moisture content further reduces after pressure accumulation in discharging pipe 72, the discharge time and the discharge amount of material are adjusted to rethread valve 73.

The third embodiment:

the difference between this embodiment and the second embodiment is that the area between the back surface of the baffle 6 and the end point 212 to the start point 211 of the first helical blade 21 is a cylindrical body 61, which is attached to the inner wall of the cylindrical feeding box 5, as shown in fig. 15.

The baffle 6 of the spiral shaft section in the cylindrical feeding box 5 rotates along with the spiral shaft 2, and the advancing direction of the propelling materials is the front side, and the reverse side is the back side. The cylindrical body 61 on the back of the baffle 6 can be a hollow cylindrical body or a solid cylindrical body, so that the material can generate continuous positive pressure and the material is prevented from being retained in the area of the cylindrical body 61.

The fourth embodiment:

as shown in fig. 16 to 18, this embodiment is different from the second embodiment in that a screw pump 8 is connected to the upper half of the support plate 4 at the rear feed end 11 of the filter chamber 1. The tail end of the screw shaft 2 positioned above is arranged on a flange plate 9 at the tail end of the filtering cavity 1; the flange 9 is of a hollow structure, and one end of the screw pump 8 is connected to the flange 9; the material enters from the feed inlet 81 of the screw pump 8 and is conveyed by the screw pump 8 to pass through the flange 9 and enter the filtering cavity 1.

The main drive rod 31 of the drive device in this embodiment is located below the filter chamber 1, and moves in the same manner as in reference 2.

The working process is as follows: materials enter the filtering cavity 1 through the feeding hole 81 of the screw pump 8 and are continuously pushed forward by the upper screw shaft 2 and the lower screw shaft 2 in the filtering cavity 1, and even if the materials which are easy to wind and harden are touched, the materials can be smoothly pushed forward without resistance due to mutual scraping between the two screw shafts 2. In the process of conveying materials, the filtering cavity 1 generates displacement with the adjacent closed ring pieces due to the movement of the first closed ring piece group 13, so that the filtering seams are kept smooth, filtrate can be discharged outwards from the inside of the filtering cavity 1 through the filtering seams, the screw pump 8 enables the materials to generate continuous positive pressure, the dehydrated materials reach the discharge end 12, the water content is further reduced after pressure accumulation in the discharge pipe 72, and the discharge time and the discharge amount of the materials are adjusted through the valve 73.

The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications thereof by those skilled in the art should be considered as not departing from the scope of the present invention.