CN217978338U

CN217978338U - Low-temperature storage tank safety relief device

Info

Publication number: CN217978338U
Application number: CN202222381947.4U
Authority: CN
Inventors: 徐旭; 吴自航
Original assignee: Hangzhou Yingming Deep Cold Vacuum Engineering Co ltd
Current assignee: Hangzhou Yingming Deep Cold Vacuum Engineering Co ltd
Priority date: 2022-09-07
Filing date: 2022-09-07
Publication date: 2022-12-06
Anticipated expiration: 2032-09-07

Abstract

The utility model relates to a cryogenic tank safety relief device, including letting out the gas ring and being used for stopping up disappointing ring upper portion open-ended lid that loses heart, let out the gas lid for it connects to lose heart ring upset, let out the gas ring top and seted up the seal groove, it is provided with retaining member and sealing member to lose heart the lid, the sealing member with the retaining member all can get into the seal groove, be provided with the fixture block in the seal groove, the retaining member with the fixture block butt can be restricted it is relative to lose heart lid the upset of disappointing ring. This application has the too big effect of solution storage tank internal pressure.

Description

Low-temperature storage tank safety relief device

Technical Field

The application relates to the field of air separation equipment, in particular to a safe discharge device of a cryogenic tank.

Background

The cryogenic tank is a pressure vessel for holding cryogenic liquids such as liquid oxygen, liquid nitrogen, liquid argon, liquid carbon dioxide, liquefied natural gas and the like.

In the storage process, because the preservation temperature of the liquid gas is lower, and the temperature difference with the external environment is larger, external heat can inevitably be transmitted into the cryogenic tank, the liquid in the cryogenic slag groove is caused to gasify naturally, the gas after gasification is enriched to the top of the cryogenic tank, simultaneously the pressure in the storage tank is increased, and when the pressure is continuously increased, the potential safety hazard can be caused to the storage tank.

With respect to the related art described above, the inventors have recognized that a device capable of safely releasing the pressure inside the tank is required.

Disclosure of Invention

In order to solve the problem of the internal pressure of the storage tank being overlarge, the application provides a safe relief device of a cryogenic storage tank.

The application provides a cryogenic tank safety relief device adopts following technical scheme:

the utility model provides a cryogenic tank safety relief device, includes to let out the gas ring and be used for stopping up the lid that loses heart of losing heart ring upper portion open-ended, let out the gas lid for it connects to lose heart ring upset, let out gas ring top and seted up the seal groove, it is provided with retaining member and sealing member to lose heart the lid, the sealing member with the retaining member all can get into the seal groove, be provided with the fixture block in the seal groove, the retaining member with the fixture block butt can restrict it is relative to lose heart the lid the upset of losing heart ring.

Through adopting above-mentioned technical scheme, the ring bottom and the storage tank intercommunication of disappointing, upper portion and the lid upset of disappointing are connected, block up the ring of leaking through the lid of disappointing. When the air release cover is in a sealing state, the locking piece and the sealing piece are both positioned in the sealing groove. When the inside atmospheric pressure increase of storage tank, the fixture block can be promoted by the retaining member, makes disappointing lid open, when atmospheric pressure release to safety range in, disappointing lid makes retaining member and sealing member continue to get into the seal groove under the dead weight effect in, is in encapsulated situation, too big and promote to let out the gas lid through the inside atmospheric pressure of storage tank and rotate and realize this kind of mode of disappointing, solves the too big problem of the inside atmospheric pressure of storage tank, need not artifical manual regulation switch moreover, convenient and fast and safe practicality.

Optionally, the seal groove is provided with a clamping groove for the fixture block to move, the fixture block is connected with the side wall of the clamping groove through a first elastic piece, the fixture block is provided with a pushing surface and a limiting surface, and the locking piece is provided with a butt surface for the limiting surface to abut against.

Through adopting above-mentioned technical scheme, when the retaining member got into the seal groove, the retaining member bottom can promote the promotion face of fixture block, makes in the fixture block gets into the draw-in groove. Then the limiting surface can abut against the abutting surface of the locking piece under the action of the first elastic piece. The slope that promotes the face for the draw-in groove is greater than the slope of spacing face for the draw-in groove, so can conveniently push the fixture block into the draw-in groove through the push face when the retaining member, when butt face and spacing face butt, when only needing the atmospheric pressure in the storage tank to be greater than safe range, the thrust of its production just can push the fixture block into the draw-in groove to can open the lid that loses heart, release atmospheric pressure. The pressure in the sump is brought within a safe range.

Optionally, the abutting surface and the limiting surface are parallel to each other.

Through adopting above-mentioned technical scheme, the butt face is parallel to each other with spacing face to can increase area of contact in the butt, with improvement frictional force.

Optionally, the limiting surface is provided with a rubber layer.

By adopting the technical scheme, the rubber layer can increase the friction force, so that the air release cover can be pushed only when the storage tank is internally provided with certain air pressure. Meanwhile, the rubber layer has a certain sealing effect, so that the leakage of gas in the storage tank can be reduced when the gas release cover is closed.

Optionally, the upper part of the rubber layer extends to the pushing surface, and the bottom of the sealing element can be in contact with the rubber layer of the pushing surface.

By adopting the technical scheme, the rubber layer extends to the pushing surface, so that the locking part can be in contact with the rubber layer when entering the sealing groove and pushing the pushing surface of the clamping block, and the rubber layer plays a role in buffering, and the air leakage cover can slow down more impact force generated on the air leakage ring when being closed under the dead weight effect.

Optionally, a separating part for preventing the rubber layer from contacting with the side wall of the clamping groove is arranged at the bottom of the clamping block.

Through adopting above-mentioned technical scheme, separate the portion and can avoid the fixture block when getting into the draw-in groove, rubber layer and draw-in groove lateral wall contact. Therefore, when the air pressure in the storage tank is larger than the friction between the rubber layer and the abutting surface, the locking piece pushes the clamping block, and the clamping block enters the clamping groove quickly.

Optionally, a sliding block is arranged in the sealing groove, the bottom of the sliding block is connected with the bottom of the sealing groove through a second elastic piece, a sealing layer is arranged at the top of the sliding block, and the sealing layer can abut against the bottom of the sealing piece.

Through adopting above-mentioned technical scheme, when sealing member got into the seal groove, can butt in the sealing layer, second elastic component can promote the slider, makes the slider slide in the seal groove, has the cushioning effect on the one hand, reduces to let out the gas lid when closed, produces too big impact force to disappointing the ring, and on the other hand can let sealing layer and sealing member keep the butt.

Optionally, a counterweight assembly is arranged at a position, far away from the rotation center of the air release cover and the air release ring, of the top of the air release cover.

Through adopting above-mentioned technical scheme, the counter weight subassembly can increase the gravity of letting out the gas lid, just promotes when avoiding the inside atmospheric pressure of storage tank still to be in safe range and lets out the gas lid.

Optionally, the counter weight subassembly includes base, balancing weight, bull stick and the piece that splines, the base is fixed in lose heart covers the upper surface, balancing weight and bull stick fixed connection, the bull stick both ends are rotationally worn to locate the base, the piece that splines is used for the restriction the bull stick is relative the base rotates.

Through adopting above-mentioned technical scheme, the balancing weight base relatively rotates to make the focus of balancing weight change, can adjust the thrust when disappointing the lid and need opening. The rotation stopping piece can rotate at the current balancing weight, and after the adjustment is completed, the gravity center of the balancing weight is in a stable state.

Optionally, a torsion spring is arranged at the turning position of the air release cover and the air release ring.

By adopting the technical scheme, the torsion spring can enable the air release cover to store force when being opened, when the air pressure in the storage tank is reduced to a safe range, the torsion spring can release the stored force, and then the torsion spring can be automatically closed under the combination of the balancing weight, so that the locking piece clamps the clamping block, and the sealing piece and the sealing layer are propped against each other. Thereby achieving the state that the air leakage cover is in a sealing state and preventing the gas in the storage tank from leaking out.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the inside atmospheric pressure increase of storage tank, the fixture block can be promoted by the retaining member, makes the lid that loses heart open, when atmospheric pressure release to safety range in, the lid that loses heart makes retaining member and sealing member continue to get into the seal groove under the dead weight effect in, is in encapsulated situation, through the inside atmospheric pressure of storage tank too big and promote to let out the lid rotation of gas and realize this kind of mode of losing heart, solve the too big problem of the inside atmospheric pressure of storage tank, need not artifical manual regulating switch moreover, convenient and fast and safe practical.

2. When the butt joint face is in butt joint with the limiting face, the clamping block can be pushed into the clamping groove by thrust generated by the storage tank only when the air pressure in the storage tank is larger than a safety range, so that the air leakage cover can be opened to release the air pressure. The pressure in the sump is brought within a safe range.

Drawings

Fig. 1 is a schematic view of the overall structure of the present application.

Fig. 2 is a schematic cross-sectional view of the present application.

Fig. 3 is an enlarged schematic view at a in fig. 2.

Fig. 4 is an enlarged schematic view at B in fig. 3.

Fig. 5 is an enlarged schematic view at C in fig. 2.

Fig. 6 is an enlarged schematic view at D in fig. 1.

Description of reference numerals: 1. a gas release ring; 11. a sealing groove; 12. a clamping block; 121. pushing the surface; 122. a limiting surface; 1221. a rubber layer; 1222. a partition portion; 13. a card slot; 14. a first elastic member; 15. a slider; 16. a second elastic member; 17. a sealing layer; 2. a venting cover; 21. a locking member; 211. an abutting surface; 212. a groove; 213. sealing the bag; 22. a seal member; 3. a counterweight assembly; 31. a base; 32. a balancing weight; 33. a rotating rod; 34. a rotation stopping member.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

Referring to fig. 1, a cryogenic tank safety relief device includes a relief ring 1 and a relief cover 2 for blocking an upper opening of the relief ring 1. The bottom of the gas release ring 1 is communicated with the storage tank, and the gas release ring 1 is fixedly connected with the storage tank in a welding mode. The upper part of the air release ring 1 is connected with an air release cover 2 in a turnover way, and a torsion spring is arranged at the turnover position of the air release cover and the air release cover, and the torsion spring is not shown in the figure. The upper part of the air release cover 2 is provided with a counterweight component 3 which can increase the gravity of the air release cover 2, and the air release cover 2 is closed by the dead weight mode

Referring to fig. 2 and 3, a locking member 21 and a sealing member 22 are fixed at the edge of the lower surface of the air release cover 2, a sealing groove 11 is formed at the top end of the air release ring 1, and when the air release cover 2 is closed, the sealing member 22 and the locking member 21 can enter the sealing groove 11. The sealing member 22 in this embodiment is made of rubber material

Referring to fig. 3 and 4, a locking groove 13 is formed in the sealing groove 11, a locking block 12 is movably disposed in the locking groove 13, one end of the locking block 12 is exposed in the sealing groove 11, the other end of the locking block is fixedly connected with a first elastic member 14, the first elastic member 14 is connected with a side wall of the locking groove 13, and the first elastic member 14 in this embodiment is a spring. The end of the locking block 12 that leaks out of the sealing groove 11 has a pushing surface 121 and a limiting surface 122, the pushing surface 121 is located at the upper portion of the limiting surface 122, the locking member 21 first contacts with the pushing surface 121 when entering the sealing groove 11, and then abuts against the limiting surface 122, the locking member 21 has an abutting surface 211 that abuts against the limiting surface 122, and in this embodiment, the abutting surface 211 and the limiting surface 122 are parallel to each other.

In order to improve the limiting effect of the limiting surface 122, a rubber layer 1221 is added on the surface of the limiting surface 122. The upper portion of the rubber layer 1221 extends over the push surface 121 so that the bottom of the seal 22 can contact the rubber layer 1221 of the push surface 121. The contact surface 211 is similarly provided with rubber, so that the frictional force between the stopper surface 122 and the contact surface 211 can be further increased, and the sealing effect can be improved. The bottom of the latch 12 is provided with a spacer 1222, and the spacer 1222 prevents the rubber layer 1221 from contacting the side wall of the latch groove 13.

The limiting member further defines a groove 212, and a sealing bag 213 is disposed in the groove 212, when the limiting surface 122 abuts against the abutting surface 211, the sealing bag 213 deforms under pressure, and a portion thereof is exposed from the groove 212, so that the sealing bag 213 abuts against the sidewall of the sealing groove 11, thereby improving the sealing effect of the venting cover 2.

Referring to fig. 5, a slider 15 is disposed in the sealing groove 11, the bottom of the slider 15 is connected to the bottom of the sealing groove 11 by a second elastic member 16, a sealing layer 17 is disposed on the top of the slider 15, the sealing layer 17 can abut against the bottom of the sealing member 22, and the abutting surface 211 of the locking member 21 can abut against the limiting surface 122 under the action of the second elastic member 16. In this embodiment, the second elastic member 16 is a spring.

Referring to fig. 6, the weight assembly 3 includes a base 31, a weight 32, a rotating rod 33, and a rotation stopper 34. Base 31 is fixed in the lid upper surface that loses heart, balancing weight 32 and bull stick 33 fixed connection, and base 31 has two, and bull stick 33 both ends are rotationally worn to locate base 31, and rotation stopping piece 34 is used for restricting the relative base 31 rotation of bull stick 33, and rotation stopping piece 34 is the bolt in this embodiment, and the bolt is when rotating, and the screw rod of bolt can support bull stick 33 to restriction bull stick 33 rotates relative base 31.

The implementation principle of the first embodiment is as follows: when the air release cover 2 is closed in the air release ring 1, the locking member 21 abuts against the fixture block 12, and the sealing member 22 abuts against the rubber layer 1221. In a sealed state. When the air pressure in the storage tank is larger than the installation value, the air release cover 2 is pushed, and at the moment, the locking block pushes the clamping block 12, so that the clamping block 12 enters the clamping groove 13. The torsion spring is in a power accumulation state after the air leakage cover 2 is opened, and when the air pressure is in a safety range, the air leakage cover 2 can be closed on the air leakage ring 1 under the action of the torsion spring and the counterweight component 3 to enter a sealing state again.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A cryogenic tank safety relief device characterized by: including letting out gas ring (1) and being used for plugging up let out gas ring (1) upper portion open-ended lid (2) of disappointing, let out gas lid (2) for let out gas ring (1) upset and connect, let out gas ring (1) top and seted up seal groove (11), it is provided with retaining member (21) and sealing member (22) to let out gas lid (2), sealing member (22) with retaining member (21) all can get into seal groove (11), be provided with fixture block (12) in seal groove (11), retaining member (21) with fixture block (12) butt can restrict it is relative to let out gas lid (2) let out gas ring (1) upset.

2. A cryogenic sump safety vent apparatus according to claim 1, wherein: the clamping groove (13) for the clamping block (12) to move is formed in the sealing groove (11), the clamping block (12) is connected with the side wall of the clamping groove (13) through a first elastic piece (14), the clamping block (12) is provided with a pushing face (121) and a limiting face (122), and the locking piece (21) is provided with a butt face (211) for the limiting face (122) to abut against.

3. A cryogenic sump safety vent apparatus according to claim 2, wherein: the abutting surface (211) and the limiting surface (122) are parallel to each other.

4. A cryogenic sump safety vent apparatus according to claim 2, wherein: the limiting surface (122) is provided with a rubber layer (1221).

5. A cryogenic sump safety relief device according to claim 4, wherein: the upper part of the rubber layer (1221) extends to the pushing surface (121), and the bottom of the sealing element (22) can be in contact with the rubber layer (1221) of the pushing surface (121).

6. The cryogenic sump relief safety device of claim 5, wherein: the bottom of the clamping block (12) is provided with a separating part (1222) used for preventing the rubber layer (1221) from contacting with the side wall of the clamping groove (13).

7. A cryogenic sump safety relief device according to any one of claims 1 to 6, wherein: be provided with slider (15) in seal groove (11), slider (15) bottom with connect through second elastic component (16) between seal groove (11) bottom, slider (15) top is provided with sealing layer (17), sealing layer (17) can the butt in sealing member (22) bottom.

8. A cryogenic sump safety relief device according to any one of claims 1 to 6, wherein: the top of the air release cover (2) is far away from the rotating center of the air release cover (2) and the air release ring (1) and is provided with a counterweight component (3).

9. The cryogenic sump relief safety device of claim 8, wherein: counter weight component (3) include base (31), balancing weight (32), bull stick (33) and end and change (34), base (31) are fixed in lose heart and cover the upper surface, balancing weight (32) and bull stick (33) fixed connection, bull stick (33) both ends are rotationally worn to locate base (31), it is used for the restriction to end to change (34) bull stick (33) is relative base (31) rotate.

10. A cryogenic sump safety relief device according to any one of claims 1 to 6, wherein: and a torsion spring is arranged at the turning position of the air release cover (2) and the air release ring (1).