阅读说明：本技术 一种快开盲板装置 (Quick-opening blind plate device ) 是由 陈伟忠 李海 于翠翠 刘波 顾月萍 冯嘉 钱土荣 于 2020-04-10 设计创作，主要内容包括：本发明公开了一种快开盲板装置,包括高颈和盲板,高颈的内孔包括由外至内设置的大孔和小孔,高颈的大孔周壁上设有卡槽,卡槽的内外侧对应通过第一锥面和第二锥面与大孔的周壁过渡连接；盲板卡装在高颈的大孔中,盲板的外侧设有与第二锥面相对的第三锥面,盲板通过开门机构与高颈的一侧铰接,盲板和高颈之间设有密封机构和锁紧机构,锁紧机构包括内小外大的锥环,锥环的周壁与第一锥面贴合,锥环的外端面与第二锥面贴合,锥环的内端面与第三锥面贴合,锥环单边截面的内侧边和外侧边之间形成10～20度的夹角,锥环设有通过截断形成的开口并在开口处设有开合机构。其具有结构简单、操作便捷、稳定可靠、密封性好、安全性高的优点。(The invention discloses a quick-opening blind plate device which comprises a high neck and a blind plate, wherein an inner hole of the high neck comprises a large hole and a small hole which are arranged from outside to inside, a clamping groove is arranged on the peripheral wall of the large hole of the high neck, and the inner side and the outer side of the clamping groove are in transition connection with the peripheral wall of the large hole correspondingly through a first conical surface and a second conical surface; the blind plate clamps in the macropore of high neck, the outside of blind plate is equipped with the third conical surface relative with the second conical surface, the blind plate is articulated with one side of high neck through mechanism of opening the door, be equipped with sealing mechanism and locking mechanism between blind plate and the high neck, locking mechanism includes the interior little outer big taper ring, the perisporium and the laminating of first conical surface of taper ring, the outer terminal surface and the laminating of second conical surface of taper ring, the interior terminal surface and the laminating of third conical surface of taper ring, form 10 ~ 20 degrees contained angles between the inboard side of the unilateral cross-section of taper ring and the outside limit, the taper ring is equipped with through cutting the opening that forms and is equipped with the mechanism that opens and shuts at the opening part. The sealing device has the advantages of simple structure, convenience in operation, stability, reliability, good sealing property and high safety.)

1. A quick-opening blind plate device comprises a high neck (1) and a blind plate (2), and is characterized in that an inner hole of the high neck (1) comprises a large hole (11) and a small hole (12) which are arranged from outside to inside, a clamping groove (13) is arranged on the peripheral wall of the large hole (11) of the high neck (1), and the inner side and the outer side of the clamping groove (13) are in transitional connection with the peripheral wall of the large hole (11) through a first conical surface (14) and a second conical surface (15); the blind plate (2) is clamped in a large hole (11) of the high neck (1), a third conical surface (21) opposite to a second conical surface (15) is arranged on the outer side of the blind plate (2), the blind plate (2) is hinged to one side of the high neck (1) through a door opening mechanism, a sealing mechanism and a locking mechanism are arranged between the blind plate (2) and the high neck (1), the locking mechanism comprises a conical ring (3) with a small inner part and a large outer part, a peripheral wall (31) of the conical ring (3) is attached to a first conical surface (14), an outer end surface (32) of the conical ring (3) is attached to the second conical surface (15), an inner end surface (33) of the conical ring (3) is attached to the third conical surface (21), an included angle of 10-20 degrees is formed between an inner side edge and an outer side edge of a single-side section of the conical ring (3), the conical ring (3) is provided with an opening formed by cutting, and an opening and closing.

2. A quick-opening blind plate device according to claim 1, characterized in that the junction of the large hole (11) and the small hole (12) of the high neck (1) forms a ring platform (16), and the ring platform (16) is transitionally connected with the peripheral wall of the small hole (12) through a fourth conical surface (17); the blind plate (2) is provided with a cone part (22) attached to the fourth conical surface (17).

3. The quick-opening blind plate device according to claim 2, characterized in that the blind plate (2) is provided with a concave platform (23) opposite to the ring platform (16) around the cone part (22), a gap is arranged between the concave platform (23) and the ring platform (16), the concave platform (23) is provided with a first sealing groove (24) along the circumferential direction, a first sealing ring (25) with a single-side section being F-shaped is installed in the first sealing groove (24), two longitudinal parts (251) of the first sealing ring (25) are clamped in the first sealing groove (24), a transverse part (252) of the first sealing ring (25) extends out of the first sealing groove (24), and a plurality of vent holes (241) distributed along the circumferential direction are arranged between the groove bottom of the first sealing groove (24) and the inner side surface of the blind plate (2); a second sealing groove (26) is further formed in the peripheral wall of the blind plate (2), and a second sealing ring (27) with a circular single-side section is mounted in the second sealing groove (26); the sealing mechanism is formed by combining a first sealing groove (24), a first sealing ring (25), a second sealing groove (26) and a second sealing ring (27).

4. The quick-opening blind plate device according to claim 3, characterized in that the opening and closing mechanism comprises a U-shaped member (34) and an inverted T-shaped hinge member (35), one end of the U-shaped member (34) is hinged with a first connecting member (36), the first connecting member (36) is fixedly connected with the end part of one side of the opening of the conical ring (3), two sides of the first connecting member (36) are correspondingly provided with a sleeve (37) and an eccentric sleeve (38) which are installed on the blind plate (2), the other end of the U-shaped member (34) is hinged with one end of the bottom of the hinge member (35), the other end of the bottom of the hinge member (35) is hinged with a second connecting member (39), the second connecting member (39) is fixedly connected with the end part of the other side of the opening of the conical ring (3), and the top of the hinge member (.

5. The quick-opening blind plate device according to claim 4, characterized in that a first main hinge seat (18) and a second main hinge seat (19) which are distributed up and down are fixed on one side of the high neck (1) through a support lug, and a first main hinge shaft (181) and a second main hinge shaft (191) are correspondingly installed on the first main hinge seat (18) and the second main hinge seat (19); a first door hinge seat (28) and a second door hinge seat (29) which are distributed up and down are fixed on the blind plate (2), and a first door hinge shaft (281) and a second door hinge shaft (291) are correspondingly installed on the first door hinge seat (28) and the second door hinge seat (29); the door opening mechanism comprises a connecting pipe (4), an upper hinge plate (41) and a lower hinge plate (42) are correspondingly fixed to the upper end and the lower end of the connecting pipe (4), two ends of the upper hinge plate (41) are correspondingly installed on a first main hinge shaft (181) and a first door hinge shaft (281) through shaft holes, two ends of the lower hinge plate (42) are correspondingly installed on a second main hinge shaft (191) and a second door hinge shaft (291) through shaft holes, and an operating handle (43) is fixed to the lower hinge plate (42).

6. A quick-opening blind plate device according to claim 5, characterized in that the lower hinge plate (42) is arranged at the upper side of the second main hinge seat (19), and a first thrust bearing (192) is arranged on the second main hinge shaft (191) between the lower hinge plate (42) and the second main hinge seat (19); the second door hinge seat (29) is located on the upper side of the lower hinge plate (42), a second thrust bearing (292) and a lower adjusting nut (293) are arranged on a second door hinge shaft (291) between the second door hinge seat (29) and the lower hinge plate (42), and an upper adjusting nut (294) is arranged on the second door hinge shaft (291) on the upper side of the second door hinge seat (29).

7. The quick-opening blind plate device according to claim 4, characterized in that an insert block assembly (5) is clamped at the opening of the conical ring (3), the insert block assembly (5) comprises an insert block body (51) and a limiting bent plate (52), the cross section of the insert block body (51) is the same as the single-side cross section of the conical ring (3), one end of the limiting bent plate (52) is fixedly connected with the insert block body (51), and the other end of the limiting bent plate (52) is provided with an interlocking mechanism.

8. The quick-opening blind plate device according to claim 7, characterized in that the interlocking mechanism comprises a limiting rod (6), a needle valve (7) and a safety lock (8), wherein the limiting rod (6) penetrates through a limiting bent plate (52) and is installed in a first threaded through hole formed in the blind plate (2), the limiting rod (6) is sequentially provided with a limiting pin (61), a limiting groove (62) and an operation hole (63) on the other side of the limiting bent plate (52) relative to the blind plate (2), the needle valve (7) is installed in a second threaded through hole formed in the blind plate (2), the safety lock (8) is connected with the needle valve (7), the safety lock (8) comprises a shell (81) and a diaphragm arranged in the shell (81), and the diaphragm is connected with a locking rod (82) which extends out of the shell (81) and is opposite to the limiting groove (62) of the limiting rod (6).

9. The quick-opening blind plate device according to any one of claims 1 to 8, characterized in that more than two Z-shaped anti-drop plates (9) are fixed on the blind plate (2) along the circumferential direction, and the anti-drop plates (9) are used for preventing the cone ring (3) from dropping off.

Technical Field

The invention relates to a sealing device, in particular to a quick-opening blind plate device for sealing an opening of equipment.

Background

Pressure regulating stations in natural gas transmission and distribution pipe networks are generally provided with filtering equipment and pressure regulating equipment so as to filter out impurities in natural gas and modulate high-pressure natural gas into low-pressure natural gas for end users to use. The open ends of the shells of the traditional filtering equipment and the pressure regulating equipment are generally closed by adopting blind plates, and parts in the shells can be inspected, maintained and replaced by dismantling the blind plates when needed; however, the blind plate is connected with the equipment shell through the bolt, the blind plate is time-consuming and labor-consuming to disassemble and assemble, and the blind plate has larger potential safety hazard due to heavier weight. In order to solve the problems of the traditional filtering equipment and the traditional pressure regulating equipment, the structural form of the quick-opening blind plate is developed in the field, and the aim of quickly opening the blind plate is fulfilled by hinging the blind plate with the equipment shell and arranging a sealing mechanism and a locking mechanism between the blind plate and the equipment shell. However, the existing quick-opening blind plate has many defects in practical application, which mainly appear in the following aspects: 1) the locking ring adopts a structural form that the inner end surface and the outer end surface are parallel, so that inconvenience is brought to installation operation due to a narrow embedding space, and the locking ring is easy to be blocked due to the axial center deviation of the blind plate after installation; 2) an axial positioning structure is lacked between a blind plate and an equipment shell, so that the phenomenon of axle center deviation is easily caused by the heavier blind plate, and the stability of the structure and the door opening and closing operation are influenced; 3) the sealing mechanism only adopts axial sealing, and the single sealing mechanism has poor reliability and affects the safety.

Disclosure of Invention

The invention aims to provide a quick-opening blind plate device which has the advantages of simple structure, convenience in operation, stability, reliability, good sealing property and high safety.

In order to solve the problems in the prior art, the invention provides a quick-opening blind plate device which comprises a high neck and a blind plate, wherein an inner hole of the high neck comprises a large hole and a small hole which are arranged from outside to inside, a clamping groove is arranged on the peripheral wall of the large hole of the high neck, and the inner side and the outer side of the clamping groove are in transition connection with the peripheral wall of the large hole correspondingly through a first conical surface and a second conical surface; the blind plate is clamped in a large hole of the high neck, a third conical surface opposite to the second conical surface is arranged on the outer side of the blind plate, the blind plate is hinged to one side of the high neck through a door opening mechanism, a sealing mechanism and a locking mechanism are arranged between the blind plate and the high neck, the locking mechanism comprises a conical ring with a small inner part and a large outer part, the peripheral wall of the conical ring is attached to the first conical surface, the outer end surface of the conical ring is attached to the second conical surface, the inner end surface of the conical ring is attached to the third conical surface, a 10-20-degree included angle is formed between the inner side edge and the outer side edge of the unilateral section of the conical ring, and the conical ring is provided with an opening formed by cutting off and is provided with.

Furthermore, the invention relates to a quick-opening blind plate device, wherein a ring platform is formed at the joint of the big hole and the small hole of the high neck, and the ring platform is in transitional connection with the peripheral wall of the small hole through a fourth conical surface; the blind plate is provided with a pyramid part attached to the fourth conical surface.

Furthermore, the invention relates to a quick-opening blind plate device, wherein a concave platform opposite to a ring platform is arranged around a conical part of the blind plate, a gap is arranged between the concave platform and the ring platform, a first sealing groove is arranged on the concave platform along the circumferential direction, a first sealing ring with a F-shaped single-side section is arranged in the first sealing groove, two longitudinal parts of the first sealing ring are clamped in the first sealing groove, the transverse part of the first sealing ring extends out of the first sealing groove, and a plurality of vent holes distributed along the circumference are arranged between the groove bottom of the first sealing groove and the inner side surface of the blind plate; a second sealing groove is also formed in the peripheral wall of the blind plate, and a second sealing ring with a round single-side section is installed in the second sealing groove; the sealing mechanism is composed of a first sealing groove, a first sealing ring, a second sealing groove and a second sealing ring in a combined mode.

Furthermore, the quick-opening blind plate device comprises a U-shaped part and an inverted T-shaped hinged part, wherein one end of the U-shaped part is hinged with a first connecting piece, the first connecting piece is fixedly connected with the end part of one side of the opening of the conical ring, two sides of the first connecting piece are correspondingly provided with a sleeve and an eccentric shaft sleeve which are installed on the blind plate, the other end of the U-shaped part is hinged with one end of the bottom of the hinged part, the other end of the bottom of the hinged part is hinged with a second connecting piece, the second connecting piece is fixedly connected with the end part of the other side of the opening of the conical ring, and the top of the hinged part is connected with.

Furthermore, the invention relates to a quick-opening blind plate device, wherein a first main hinge seat and a second main hinge seat which are distributed up and down are fixed on one side of the high neck through a support lug, and a first main hinge shaft and a second main hinge shaft are correspondingly arranged on the first main hinge seat and the second main hinge seat; a first door hinge seat and a second door hinge seat which are distributed up and down are fixed on the blind plate, and a first door hinge shaft and a second door hinge shaft are correspondingly arranged on the first door hinge seat and the second door hinge seat; the door opening mechanism comprises a connecting pipe, an upper hinge plate and a lower hinge plate are correspondingly fixed at the upper end and the lower end of the connecting pipe, two ends of the upper hinge plate are correspondingly installed on a first main hinge shaft and a first door hinge shaft through shaft holes, two ends of the lower hinge plate are correspondingly installed on a second main hinge shaft and a second door hinge shaft through shaft holes, and an operating handle is fixed on the lower hinge plate.

Furthermore, the invention relates to a quick-opening blind plate device, wherein the lower hinge plate is positioned at the upper side of the second main hinge seat, and a first thrust bearing is arranged on a second main hinge shaft between the lower hinge plate and the second main hinge seat; the second door hinge seat is positioned on the upper side of the lower hinge plate, a second thrust bearing and a lower adjusting nut are arranged on a second door hinge shaft between the second door hinge seat and the lower hinge plate, and an upper adjusting nut is arranged on a second door hinge shaft on the upper side of the second door hinge seat.

Further, the quick-opening blind plate device provided by the invention is characterized in that an insert assembly is clamped at the opening of the conical ring, the insert assembly comprises an insert body and a limiting bent plate, the cross section of the insert body is the same as the single-side cross section of the conical ring, one end of the limiting bent plate is fixedly connected with the insert body, and the other end of the limiting bent plate is provided with an interlocking mechanism.

Furthermore, the quick-opening blind plate device comprises a limiting rod, a needle valve and a safety lock, wherein the limiting rod penetrates through a limiting bent plate and is installed in a first threaded through hole formed in the blind plate, the limiting rod is sequentially provided with a limiting pin, a limiting groove and an operating hole on the other side, opposite to the blind plate, of the limiting bent plate, the needle valve is installed in a second threaded through hole formed in the blind plate, the safety lock is connected with the needle valve, the safety lock comprises a shell and a membrane arranged in the shell, and the membrane is connected with a locking rod extending out of the shell and opposite to the limiting groove of the limiting rod.

Furthermore, the quick-opening blind plate device is characterized in that more than two Z-shaped anti-falling plates are fixed on the blind plate along the circumferential direction and are used for preventing the conical ring from falling off.

Compared with the prior art, the quick-opening blind plate device has the following advantages: the invention sets a high neck and a blind plate, the inner hole of the high neck is provided with a large hole and a small hole which are distributed from outside to inside, the peripheral wall of the large hole of the high neck is provided with a clamping groove, and the inner side and the outer side of the clamping groove are in transition connection with the peripheral wall of the large hole correspondingly through a first conical surface and a second conical surface; the blind plate is clamped in a large hole of the high neck, a third conical surface opposite to the second conical surface is arranged on the outer side of the blind plate, the blind plate is hinged to one side of the high neck through a door opening mechanism, a sealing mechanism and a locking mechanism are arranged between the blind plate and the high neck, the locking mechanism is provided with a conical ring with a small inner part and a large outer part, the peripheral wall of the conical ring is attached to the first conical surface, the outer end surface of the conical ring is attached to the second conical surface, the inner end surface of the conical ring is attached to the third conical surface, an included angle of 10-20 degrees is formed between the inner side edge and the outer side edge of the unilateral section of the conical ring, and the conical ring is provided with an opening and closing mechanism through an opening formed by cutting. Therefore, the quick blind opening plate device with simple structure, convenient operation, stability, reliability, good sealing performance and high safety is formed. In practical application, the small hole end of the high neck is connected with the equipment shell, the equipment shell can be sealed by closing the blind plate, and parts in the equipment shell can be inspected, maintained and replaced by opening the blind plate when needed, so that the working efficiency is improved. The blind plate is hinged with the high neck through the door opening mechanism, so that the convenience of door opening and closing operation is improved; the sealing performance between the blind plate and the high neck is ensured through the sealing mechanism; the structural stability between the blind plate and the high neck is ensured through the locking mechanism; the cone ring can be quickly unfolded or contracted through the opening and closing mechanism, and the convenience of locking and unlocking operations is improved. Meanwhile, the first conical surface, the second conical surface and the third conical surface are arranged, and an included angle of 10-20 degrees is formed between the inner side and the outer side of the unilateral section of the conical ring, so that the conical ring has certain taper in the axial direction and certain taper in the radial direction, the conical ring can be gradually unfolded and extrude the blind plate and the high neck during locking operation, the convenience of door closing and locking operation and the stability of the structure are improved, the conical ring can be quickly contracted through the radial taper during unlocking operation, the phenomenon that the conical ring is clamped can be effectively avoided, and the difficulty of unlocking and door opening operation is reduced.

The fast-opening blind plate device of the invention is further described in detail with reference to the specific embodiments shown in the drawings.

Drawings

FIG. 1 is a front view of a quick-opening blind apparatus of the present invention;

FIG. 2 is a view taken along line A-A of FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 1 at position B;

FIG. 4 is an enlarged view of a portion of FIG. 2 at position C;

FIG. 5 is a front view of the high neck of a quick opening blind apparatus of the present invention;

FIG. 6 is a view from direction D-D of FIG. 5;

FIG. 7 is an enlarged view of a portion of FIG. 6 at position E;

FIG. 8 is a front view of a blind plate of a quick-opening blind plate apparatus of the present invention;

FIG. 9 is a view from direction F-F of FIG. 8;

FIG. 10 is an enlarged view of a portion of FIG. 9 at position G;

FIG. 11 is a front view of a cone ring of a quick-opening blind plate apparatus of the present invention;

FIG. 12 is a view taken in the direction H-H of FIG. 11;

FIG. 13 is an enlarged view of a portion of FIG. 12 at position I;

FIG. 14 is an enlarged view of a portion of FIG. 12 at position J;

FIG. 15 is a front view of an insert module in a quick-opening blind apparatus of the present invention;

FIG. 16 is a view taken along line K-K of FIG. 15;

FIG. 17 is a front view of a U-shaped member of a quick-opening blind plate device according to the present invention;

FIG. 18 is a view taken along line L-L of FIG. 17;

fig. 19 is a schematic connection diagram of a cone ring and an opening and closing mechanism in a quick-opening blind plate device according to the invention.

Detailed Description

First, it should be noted that, the directional terms such as up, down, left, right, front, rear, etc. described in the present invention are only described with reference to the accompanying drawings for understanding, and are not intended to limit the technical solution and the claimed scope of the present invention.

An embodiment of a quick-opening blind apparatus of the present invention, as shown in fig. 1 to 19, comprises a neck 1 and a blind 2. The inner hole of the high neck 1 is provided with big holes 11 and small holes 12 which are distributed from outside to inside. The peripheral wall of the large hole 11 of the high neck 1 is provided with a clamping groove 13, so that the inner side and the outer side of the clamping groove 13 are in transition connection with the peripheral wall of the large hole 11 correspondingly through a first conical surface 14 and a second conical surface 15. The blind plate 2 is clamped in the large hole 11 of the neck 1, and a third tapered surface 21 opposite to the second tapered surface 15 is provided on the outer side of the blind plate 2. The blind plate 2 is hinged with one side of the high neck 1 through a door opening mechanism, and a sealing mechanism and a locking mechanism are arranged between the blind plate 2 and the high neck 1. The locking mechanism is provided with a conical ring 3 with a small inner part and a large outer part, the peripheral wall 31 of the conical ring 3 is attached to the first conical surface 14, the outer end surface 32 of the conical ring 3 is attached to the second conical surface 15, the inner end surface 33 of the conical ring 3 is attached to the third conical surface 21, an included angle of 10-20 degrees is formed between the inner side and the outer side of the unilateral section of the conical ring 3, the conical ring 3 is provided with an opening formed by cutting, and an opening and closing mechanism is arranged at the opening.

Through the structure setting, the quick blind opening plate device with simple structure, convenient operation, stability, reliability, good sealing performance and high safety is formed. In practical application, the small hole end of the high neck 1 is connected with the equipment shell, the equipment shell can be sealed by closing the blind plate 2, and parts in the equipment shell can be inspected, maintained and replaced by opening the blind plate 2 when needed, so that the working efficiency is improved. According to the invention, the blind plate 2 is hinged with the high neck 1 through the door opening mechanism, so that the convenience of door opening and closing operations is improved; the sealing performance between the blind plate 2 and the high neck 1 is ensured through the sealing mechanism; the structural stability between the blind plate 2 and the high neck 1 is ensured through the locking mechanism; the cone ring 3 can be quickly unfolded or contracted through the opening and closing mechanism, and the convenience of locking and unlocking operations is improved. Meanwhile, the first conical surface 14, the second conical surface 15 and the third conical surface 21 are arranged, and an included angle of 10-20 degrees is formed between the inner side and the outer side of the unilateral section of the conical ring 3, so that the conical ring 3 has certain taper in the axial direction and certain taper in the radial direction, the conical ring 3 can be gradually unfolded and extrude the blind plate 2 and the high neck 1 during locking operation, the convenience of door closing and locking operation and the stability of the structure are improved, the conical ring 3 can be quickly contracted through the radial taper during unlocking operation, the phenomenon that the conical ring 3 is clamped can be effectively avoided, and the difficulty of unlocking and door opening operation is reduced. It should be noted that the above-mentioned device housing refers to the housing of the filtering device, the pressure regulating device, and the like, in practical application, the neck 1 can be manufactured separately and welded with the device housing in a sealing manner, or manufactured integrally with the device housing; the opening of the door refers to opening the blind plate, and the closing of the door refers to closing the blind plate.

Preferably, the junction of the large and small holes 11, 12 of the neck 1 forms a ring platform 16. In the present embodiment, the annular platform 16 is transitionally connected with the peripheral wall of the small hole 12 through the fourth conical surface 17, and the blind plate 2 is provided with a conical part 22 attached to the fourth conical surface 17. The structure can realize the automatic centering and positioning function during the door closing operation through the matching of the fourth conical surface 17 and the conical part 22, thereby improving the convenience of the operation; and after the door is closed, the pyramid part 22 is attached to the fourth conical surface 17, and the cone ring 3 is matched to extrude the high neck 1 and the blind plate 2, so that the problem of axial center deviation of the blind plate 2 can be avoided, and the stability of the structure is enhanced. Meanwhile, in the present embodiment, the blank plate 2 is formed with a recessed land 23 facing the annular land 16 around the tapered portion 22, and a certain gap is left between the recessed land 23 and the annular land 16. A first seal groove 24 is formed in the circumferential direction of a concave table 23, a first seal ring 25 having an F-shaped cross section on one side is installed in the first seal groove 24, two longitudinal parts 251 of the first seal ring 25 are clamped in the first seal groove 24, a transverse part 252 of the first seal ring 25 is extended out of the first seal groove 24, and a plurality of vent holes 241 distributed along the circumference are formed between the groove bottom of the first seal groove 24 and the inner side surface of a blind plate 2. A second seal groove 26 is provided in the peripheral wall of the blind plate 2, and a second seal ring 27 having a circular cross section on one side is fitted in the second seal groove 26. The sealing mechanism is a three-dimensional sealing structure formed by combining a first sealing groove 24, a first sealing ring 25, a second sealing groove 26 and a second sealing ring 27, wherein the first sealing groove 24 and the first sealing ring 25 realize axial sealing, and the second sealing groove 26 and the second sealing ring 27 realize radial sealing. Compared with the existing single sealing structure, the sealing structure can effectively improve the reliability and safety of sealing. Meanwhile, according to the invention, the first sealing ring 25 is in an F-shaped structural form, the vent hole 241 introduces high-pressure gas in the equipment into the first sealing groove 24 in a door closing state, the introduced high-pressure gas extrudes the first sealing ring 25 into the annular table 16, and the extrusion is tighter as the gas pressure is higher, so that the sealing reliability is effectively enhanced.

As a specific implementation mode, the invention adopts the following structure for the opening and closing mechanism: arranging a U-shaped part 34 and an inverted T-shaped hinge part 35, enabling one end of the U-shaped part 34 to be hinged with a first connecting piece 36, enabling the first connecting piece 36 to be fixedly connected with the end part of one side of the opening of the conical ring 3, and correspondingly arranging a sleeve 37 and an eccentric shaft sleeve 38 which are arranged on the blind plate 2 at two sides of the first connecting piece 36; the other end of the U-shaped member 34 is hinged with one end of the bottom of the hinge 35, the other end of the bottom of the hinge 35 is hinged with the second connecting member 39, the second connecting member 39 is fixedly connected with the end of the conical ring 3 on the other side of the opening, and the top of the hinge 35 is provided with a force applying rod 351. The opening and closing mechanism has the advantages of simple structure, convenience in operation and control and good synchronism, the force applying rod 351 is used for rotating the hinge 35, and the cone ring 3 can be unfolded or contracted under the action of the U-shaped part 34, the sleeve 37 and the eccentric shaft sleeve 38, so that the locking or unlocking operation is completed.

As a concrete implementation mode, the invention fixes a first main hinge seat 18 and a second main hinge seat 19 which are distributed up and down on one side of the high neck 1 through a support lug, and a first main hinge shaft 181 and a second main hinge shaft 191 are correspondingly arranged on the first main hinge seat 18 and the second main hinge seat 19; a first door hinge seat 28 and a second door hinge seat 29 are fixed on the blind plate 2, and a first door hinge shaft 281 and a second door hinge shaft 291 are correspondingly mounted on the first door hinge seat 28 and the second door hinge seat 29. Meanwhile, the door opening mechanism adopts the following structure in the specific embodiment: the connecting pipe 4 is provided, the upper hinge plate 41 and the lower hinge plate 42 are fixed at the upper and lower ends of the connecting pipe 4, the two ends of the upper hinge plate 41 are correspondingly installed on the first main hinge shaft 181 and the first door hinge shaft 281 through the shaft holes, the two ends of the lower hinge plate 42 are correspondingly installed on the second main hinge shaft 191 and the second door hinge shaft 291 through the shaft holes, and the operating handle 43 is fixed on the lower hinge plate 42. The door opening mechanism with the structure has the advantages of simple structure, convenience in operation and strong adaptability, the door opening mechanism is driven to rotate around the first main hinge shaft 181 and the second main hinge shaft 191 through the operating handle 43, the purpose of opening and closing the door can be quickly achieved, the blind plate 2 is hinged with the door opening mechanism through the first door hinge shaft 281 and the second door hinge shaft 291, and the adaptability of the blind plate 2 to the high neck 1 is improved. As an optimized solution, the present embodiment arranges the lower hinge plate 42 on the upper side of the second main hinge base 19, and arranges the first thrust bearing 192 on the second main hinge shaft 191 between the lower hinge plate 42 and the second main hinge base 19. This arrangement improves the smoothness of the rotation of the door opening mechanism about the first main hinge shaft 181 and the second main hinge shaft 191 by the first thrust bearing 192. Meanwhile, the present embodiment provides the second door hinge base 29 at an upper side of the lower hinge plate 42, and provides the second thrust bearing 292 and the lower adjustment nut 293 at the second door hinge shaft 291 between the second door hinge base 29 and the lower hinge plate 42, and provides the upper adjustment nut 294 at the second door hinge shaft 291 at the upper side of the second door hinge base 29. This arrangement improves the stability of the blind plate 2 in rotation about the first and second door hinge axes 281, 291 by the second thrust bearing 292, and the blind plate 2 can be finely adjusted by the lower and upper adjusting nuts 293, 294 so as to be adapted to the highneck 1, enhancing the practicability.

As an optimized scheme, the insert block assembly 5 is clamped at the opening of the conical ring 3 in the embodiment. The insert assembly 5 specifically comprises an insert body 51 and a limiting bent plate 52, wherein the cross section of the insert body 51 is the same as the single-side cross section of the taper ring 3, one end of the limiting bent plate 52 is fixedly connected with the insert body 51, and the other end of the limiting bent plate 52 is provided with an interlocking mechanism. The structure is arranged in a door closing state, the two ends of the opening of the conical ring 3 are blocked by the insert block assembly 5, so that the conical ring 3 can be prevented from automatically contracting, the structural stability is enhanced, and the safety and reliability are improved. As a specific embodiment, the invention adopts the following structure for the interlocking mechanism: comprises a limiting rod 6, a needle valve 7 and a safety lock 8. The limiting rod 6 penetrates through the limiting bent plate 52 and is installed in a first threaded through hole formed in the blind plate 2, and the limiting pin 61, the limiting groove 62 and the operating hole 63 are sequentially arranged on the limiting rod 6 on the other side, opposite to the blind plate 2, of the limiting bent plate 52; the needle valve 7 is arranged in a second threaded through hole arranged on the blind plate 2; the safety lock 8 is connected to the needle valve 7, wherein the safety lock 8 comprises a housing 81 and a membrane arranged in the housing 81, and the membrane is connected to a lock rod 82 extending out of the housing 81 and opposite to the limiting groove 62 of the limiting rod 6. According to the structure, when the air pressure in the equipment is higher than a safety value, the lock rod 82 of the safety lock 8 extends into the limit groove 62 of the limit rod 6, at the moment, the limit rod 6 and the insert block assembly 5 cannot be detached, so that unlocking and door opening operations cannot be performed, and the safety of operators and the equipment is ensured; when the air pressure in the equipment is lower than the safety value, the lock rod 82 of the safety lock 8 can be retracted, and then the unlocking and door opening operations can be carried out after the limiting rod 6 and the insert assembly 5 are sequentially removed. According to the invention, the limiting rod 6 is arranged in the first threaded through hole arranged on the blind plate 2, and the purposes of exhausting and relieving pressure can be realized after the limiting rod 6 is removed, so that the safety is further enhanced. In the concrete application, the joints of the limiting rod 6, the needle valve 7 and the blind plate 2 are all provided with sealing gaskets so as to ensure the sealing performance of the joints.

It should be noted that, in practical application, the bottom of the slot 13 is in an arc structure, and the exhaust hole 131 is arranged between the bottom of the slot 13 and the outer peripheral wall of the high neck 1, so that the locking and unlocking actions of the slot 13 can be prevented from being influenced by the air blocking through the exhaust hole 131, and the stability of the actions is ensured. In order to avoid the falling of the conical ring 3 in the door opening state, more than two Z-shaped anti-falling plates 9 are fixed on the blind plate 2 along the circumferential direction.

The above examples are only for describing the preferred embodiments of the present invention, and do not limit the scope of the claimed invention, and various modifications made by those skilled in the art according to the technical solutions of the present invention should fall within the scope of the invention defined by the claims without departing from the design concept of the present invention.