Low-temperature stop valve with pressure relief device

Abstract

The utility model provides a low-temperature stop valve with a pressure relief device, which belongs to the field of stop valves and comprises a valve body, an adjusting valve rod is arranged in the middle of the top of the valve body, a pressure relief pipe is arranged in the middle of one side of the valve body, and the inside of the pressure relief pipe is divided into a pressure relief channel and an input channel. The clamping sleeve is matched with the sealing gasket to be clamped with the inner wall of the annular groove, the fixing pins are inserted into the fixing holes and the hole grooves, and therefore the fixing pipe and the pressure relief pipe are installed and fixed, the communicating pipe on one side of the fixing pipe is clamped with the inner wall of the connector, and one end of the communicating pipe and the connector are locked and fixed in cooperation with the locking ring. Therefore, the pressure relief structure is mounted and dismounted, and the problem that the whole structure cannot be reused due to the fact that the pressure relief structure is damaged in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to the field of shut-off valves, specifically a cryogenic shut-off valve with a pressure relief device. Background Technology

[0002] Cryogenic shut-off valves are suitable for management systems of cryogenic liquid storage and transportation equipment, featuring flexible switching and reliable sealing. They can also be used in management systems for other cryogenic and deep-cryogenic media. A search of application CN202320128300.2 discloses a cryogenic shut-off valve with a pressure relief device, which describes a valve including a main valve core, upper valve stem, lower valve stem, shut-off valve body, and pressure relief device. The upper valve stem, lower valve stem, and main valve core are connected and installed in the shut-off valve body from top to bottom. The lower end of the shut-off valve body has a fluid inlet channel, and the side wall of the shut-off valve body has a fluid outlet channel and a pressure relief device. A pressure relief port is provided inside the cryogenic shut-off valve body. The outer surface of the valve and the fluid input channel form the valve cavity. The valve cavity is connected to the pressure relief port, the fluid input channel, and the fluid output channel. The upper valve stem is configured to rotate and drive the lower valve stem and the main valve core to move up and down. The pressure relief device is configured to guide the fluid from the fluid output channel to the fluid input channel when the pressure in the fluid output channel is too high. However, the above description has the following defects in actual use: the structure of this cryogenic valve is relatively fixed during use, and the pressure relief structure cannot be installed and replaced when damaged. At the same time, the pressure relief position of the valve lacks a protective structure during use. Therefore, it is necessary to design a cryogenic valve with a pressure relief device that is highly practical. Utility Model Content

[0003] The purpose of this invention is to provide a cryogenic shut-off valve with a pressure relief device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a low-temperature shut-off valve with a pressure relief device, comprising: a valve body, wherein an adjusting valve stem is provided in the middle of the top of the valve body, and a pressure relief pipe is provided in the middle of one side of the valve body, wherein the interior of the pressure relief pipe is divided into a pressure relief channel and an input channel;

[0005] A pressure relief connection assembly includes a locking sleeve that engages with the surface of a pressure relief pipe. A fixing pipe is provided in the middle of the locking sleeve. Several fixing holes are provided on the side of the surface of the locking sleeve. The inner walls of the fixing holes are threadedly connected to several slots on the end face of the pressure relief pipe by fixing pins. A connecting pipe is provided in the middle of one side of the fixing pipe. The other end of the connecting pipe is engaged with a connector provided in the middle of one side of the pressure relief pipe. The other end of the connector extends into the input channel. A sealing plug is provided on the edge of the inner wall of the fixing pipe.

[0006] The protective assembly includes two fitting blocks mounted on the surface of the valve body. Each of the two fitting blocks has a fixing block on one side of its opposite edge. Each of the two fixing blocks has a sliding groove on one side of its opposite edge. Each of the two sliding grooves has a sliding rod on its inner wall. Each of the two sliding rods has a rubber pad at one end. Each of the two sliding rods has a slider slidably connected to its middle section. Each of the two sliding rods has a buffer spring fitted on the surface of its other end. The two sliders are fixedly connected to the two sides of the protective cover on their opposite sides.

[0007] As a preferred embodiment of this utility model: an annular groove is provided on the edge of the pressure relief pipe end face, and a sealing gasket is provided on the inner wall of the annular groove. The inner wall of the annular groove can be threaded into the inner wall of the locking sleeve.

[0008] As a preferred embodiment of this utility model: the inner wall of the fixed tube is provided with a cavity groove, the inner wall of the cavity groove is provided with a plurality of guide rods, the surface of each of the plurality of guide rods is slidably connected with a pressure relief block, the surface of the other end of each of the plurality of guide rods is sleeved with a reset spring, and the surface of one end of the pressure relief block is sleeved with two sealing lubrication rings.

[0009] As a preferred embodiment of this utility model: a pressure relief hole is provided on one side of the inner wall of the cavity, the inner wall of the pressure relief hole is fixedly connected to one end of the connecting pipe, and the other end of the connecting pipe is fixed to the end face of the connector by a locking ring.

[0010] As a preferred embodiment of this utility model: two mounting holes are provided on the surfaces of the two bonding blocks, and the inner walls of the two sets of mounting holes are threadedly connected to two sets of mating holes provided on the surface of the valve body by mounting pins.

[0011] As a preferred embodiment of this utility model: each of the two bonding blocks has an arc-shaped groove at one of its opposite ends, and the inner walls of the two arc-shaped grooves are slidably connected to the surface of the protective cover.

[0012] As a preferred embodiment of this utility model: the regulating valve stem is disposed on the inner wall of the valve sleeve located at the top center of the valve body.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) By engaging the locking sleeve with the sealing gasket and engaging the inner wall of the annular groove, inserting several fixing pins into several fixing holes and slots, the fixing pipe and the pressure relief pipe are installed and fixed. The connecting pipe on one side of the fixing pipe is engaged with the inner wall of the joint. With the locking ring, one end of the connecting pipe is locked and fixed to the joint, thereby completing the installation and disassembly of the pressure relief structure and avoiding the problem of the overall structure being unusable due to damage to the pressure relief structure.

[0015] (2) By engaging the two fitting blocks with the surface of the valve body and inserting the two sets of mounting pins into the two sets of mounting holes and mating holes, the installation and disassembly of the two fitting blocks and the valve body are completed, thus realizing the installation of the protective cover. When the pressure relief structure is damaged and leaks, the impact force of the gas or liquid generated causes the protective cover to move. The protective cover drives the two sliders to move in the grooves on the surfaces of the two fixed blocks, and cooperates with the two grooves to squeeze the rubber pads and buffer springs on the surfaces of the two slide rods, thus buffering the impact force on the protective cover and avoiding the impact of the pressure relief structure damage to the outside world, thereby improving the protection performance of the pressure relief structure. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a partial structural schematic diagram of the present invention;

[0018] Figure 3 This is a schematic diagram of the pressure relief connection assembly of this utility model;

[0019] Figure 4 This is a schematic diagram of the protective component structure of this utility model.

[0020] In the diagram: 1. Valve body; 11. Adjusting valve stem; 12. Pressure relief pipe; 13. Orifice / groove; 14. Connector; 15. Annular groove; 16. Sealing gasket; 17. Butt hole;

[0021] 2. Pressure relief connection assembly; 21. Snap-fit ​​sleeve; 22. Fixing tube; 23. Fixing hole; 24. Fixing pin; 25. Connecting tube; 26. Sealing plug; 27. Guide rod; 28. Pressure relief block; 29. ​​Return spring; 210. Sealing lubrication ring; 211. Pressure relief hole; 212. Locking ring;

[0022] 3. Protective components; 31. Adhesive block; 32. Fixing block; 33. Slide groove; 34. Slide rod; 35. Rubber pad; 36. Slider; 37. Buffer spring; 38. Protective cover; 39. Mounting hole; 310. Mounting pin. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] Please see Figures 1-4 A cryogenic shut-off valve with a pressure relief device includes: a valve body 1, an adjusting valve stem 11 provided in the middle of the top of the valve body 1, and a pressure relief pipe 12 provided in the middle of one side of the valve body 1. The interior of the pressure relief pipe 12 is divided into a pressure relief channel and an input channel.

[0025] Please see Figure 3 The pressure relief connection assembly 2 includes a locking sleeve 21 that engages with the surface of the pressure relief pipe 12. A fixing pipe 22 is provided in the middle of the locking sleeve 21. Several fixing holes 23 are provided on the side of the surface of the locking sleeve 21. The inner walls of the several fixing holes 23 are threadedly connected to several slots 13 provided on the end face of the pressure relief pipe 12 by fixing pins 24. A connecting pipe 25 is provided in the middle of one side of the fixing pipe 22. The other end of the connecting pipe 25 is engaged with a connector 14 provided in the middle of one side of the pressure relief pipe 12. The other end of the connector 14 extends into the input channel. A sealing plug 26 is provided on the edge of the inner wall of the fixing pipe 22.

[0026] In practical use: the locking sleeve 21 is engaged with the sealing gasket 16 and the inner wall of the annular groove 15. Several fixing pins 24 are inserted into several fixing holes 23 and slots 13 to install and fix the fixing pipe 22 and the pressure relief pipe 12. The connecting pipe 25 on one side of the fixing pipe 22 is engaged with the inner wall of the connector 14. With the locking ring 212, one end of the connecting pipe 25 is locked and fixed to the connector 14, thus completing the installation and disassembly of the pressure relief structure and avoiding the problem that the entire structure cannot be used again due to the previous damage to the pressure relief structure.

[0027] Please see Figure 4 The protective component 3 includes two fitting blocks 31 installed on the surface of the valve body 1. Each of the two fitting blocks 31 has a fixing block 32 on the edge of its opposite side. Each of the two fixing blocks 32 has a groove 33 on its opposite side. Each of the two grooves 33 has a sliding rod 34 on its inner wall. Each of the two sliding rods 34 has a rubber pad 35 at one end. Each of the two sliding rods 34 has a slider 36 slidably connected to its middle. Each of the two sliding rods 34 has a buffer spring 37 sleeved on its other end surface. The opposite side of the two sliders 36 is fixedly connected to both sides of the protective cover 38.

[0028] In practical use: the two fitting blocks 31 are engaged with the surface of the valve body 1, and the two sets of mounting pins 310 are inserted into the two sets of mounting holes 39 and docking holes 17 to complete the installation and removal of the two fitting blocks 31 and the valve body 1, thereby installing the protective cover 38. When the pressure relief structure is damaged and leaks, the impact force of the gas or liquid generated causes the protective cover 38 to move. The protective cover 38 drives the two sliders 36 to move in the grooves 33 on the surface of the two fixed blocks 32, and cooperates with the two grooves 33 to squeeze the rubber pads 35 and buffer springs 37 on the surface of the two slide rods 34, thereby buffering the impact force on the protective cover 38, and avoiding the impact of the pressure relief structure damage to the outside world, thus improving the protection performance of the pressure relief structure.

[0029] Please see Figure 3 An annular groove 15 is provided on the edge of the end face of the pressure relief pipe 12. A sealing gasket 16 is provided on the inner wall of the annular groove 15. The inner wall of the annular groove 15 can be threaded into the inner wall of the locking sleeve 21.

[0030] In practical use: the locking sleeve 21 is engaged with the sealing gasket 16 and the inner wall of the annular groove 15 to increase the sealing performance of the connection between the pressure relief pipe 12 and the fixed pipe 22 at the pressure relief structure position.

[0031] Please see Figure 3 The inner wall of the fixed tube 22 is provided with a cavity, and the inner wall of the cavity is provided with a number of guide rods 27. Each of the guide rods 27 is slidably connected to a pressure relief block 28. Each of the other ends of the guide rods 27 is fitted with a reset spring 29. One end of the pressure relief block 28 is fitted with two sealing lubrication rings 210.

[0032] In practical use: The pressure relief channel inside the pressure relief pipe 12 sends liquid or gas into the fixed pipe 22. The impact force of the liquid or gas causes the pressure relief block 28 to move on the surface of several guide rods 27 on the inner wall of the cavity, and in conjunction with the cavity, it squeezes several return springs 29 until the pressure relief block 28 moves to a position that exposes the pressure relief hole 211. The liquid or gas enters the connecting pipe 25 from the pressure relief hole 211 and enters the input channel inside the pressure relief pipe 12 through the connector 14 until the pressure on both sides of the shut-off valve gradually reaches a stable limit. In conjunction with the several return springs 29, the pressure relief block 28 moves and returns to the initial state, thereby completing the pressure relief operation of the cryogenic shut-off valve.

[0033] Please see Figure 3 A pressure relief hole 211 is provided on one side of the inner wall of the cavity. The inner wall of the pressure relief hole 211 is fixedly connected to one end of the connecting pipe 25. The other end of the connecting pipe 25 is fixed to the end face of the connector 14 by a locking ring 212.

[0034] In practical use: the other end of the connecting pipe 25 is threaded to the end face of the connector 14 with the locking ring 212, so as to facilitate the installation and disassembly of the connecting pipe 25 and the pressure relief pipe 12.

[0035] Please see Figure 4 Each of the two mating blocks 31 has two mounting holes 39 on its surface. The inner walls of the two sets of mounting holes 39 are threaded to the two sets of mating holes 17 on the surface of the valve body 1 by mounting pins 310.

[0036] In practical use: engage the two fitting blocks 31 with the surface of the valve body 1, insert the two sets of mounting pins 310 into the two sets of mounting holes 39 and docking holes 17 to complete the installation and disassembly of the two fitting blocks 31 with the valve body 1, thereby installing the protective cover 38.

[0037] Please see Figure 4 Each of the two mating blocks 31 has an arc-shaped groove at one end opposite to the other, and the inner walls of the two arc-shaped grooves are slidably connected to the surface of the protective cover 38.

[0038] In practical use: the surface of the protective cover 38 is slidably connected to the inner walls of the two arc-shaped grooves at opposite ends of the two fitting blocks 31, so that the protective cover 38 can move after being subjected to force.

[0039] Please see Figure 1 The regulating valve stem 11 is located on the inner wall of the valve sleeve located at the top center of the valve body 1.

[0040] In practical use: When the adjusting valve rod 11 on the inner wall of the valve sleeve at the top of the valve body 1 moves, it facilitates the shut-off of the liquid or gas flowing inside the valve body 1.

[0041] In use, engage the locking sleeve 21 with the sealing gasket 16 and the inner wall of the annular groove 15; insert several fixing pins 24 into several fixing holes 23 and slots 13; install and fix the fixing pipe 22 and the pressure relief pipe 12; engage the connecting pipe 25 on one side of the fixing pipe 22 with the inner wall of the connector 14; and use the locking ring 212 to lock one end of the connecting pipe 25 to the connector 14, thus completing the installation and disassembly of the pressure relief structure; engage the two fitting blocks 31 with the surface of the valve body 1; and insert two sets of mounting pins 310 into two sets of mounting holes 39 and mating holes 17, thus completing the installation and disassembly of the two pressure relief structures. The installation and removal of the fitting block 31 from the valve body 1 enables the installation of the protective cover 38. When the pressure relief structure is damaged and leaks, the impact force of the gas or liquid generated causes the protective cover 38 to move. The protective cover 38 drives the two sliders 36 to move in the grooves 33 on the surfaces of the two fixed blocks 32, and cooperates with the two grooves 33 to squeeze the rubber pads 35 and buffer springs 37 on the surfaces of the two slide rods 34, buffering the impact force on the protective cover 38, and avoiding the impact of the pressure relief structure damage to the outside world, thereby improving the protection performance of the pressure relief structure.

[0042] The contents not described in detail in this description are existing technologies known to those skilled in the art. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A cryogenic stop valve with pressure relief device, characterized in that Include: The valve body (1), the middle part of the top of the valve body (1) is provided with adjusting valve rod (11), the middle part of one side of the valve body (1) is provided with pressure relief pipe (12), the inner part of the pressure relief pipe (12) is pressure relief channel and input channel; Pressure relief connecting assembly (2), the pressure relief connecting assembly (2) includes the clamping sleeve (21) with the surface of pressure relief pipe (12) clamping, the middle part of the clamping sleeve (21) is provided with fixed pipe (22), the side of the surface of the clamping sleeve (21) is provided with a plurality of fixed holes (23), the inner wall of a plurality of fixed holes (23) is all connected with the end surface of pressure relief pipe (12) by fixed pin (24) and a plurality of hole grooves (13) are connected with the end surface of pressure relief pipe (12) by fixed pin (24) and a plurality of hole grooves (13) are connected, the middle part of one side of the fixed pipe (22) is provided with communication pipe (25), the other end of the communication pipe (25) is connected with the joint (14) on one side of the middle part of pressure relief pipe (12), the other end of the joint (14) extends to the inside of the input channel, the edge of the inner wall of the fixed pipe (22) is provided with sealing plug (26); Protective assembly (3), the protective assembly (3) includes two abutting blocks (31) mounted on the surface of the valve body (1), the edges of the opposite sides of the two abutting blocks (31) are provided with fixed blocks (32), the opposite sides of the two fixed blocks (32) are provided with sliding grooves (33), the inner walls of the two sliding grooves (33) are provided with sliding rods (34), the ends of the two sliding rods (34) are provided with rubber pads (35), the middle parts of the two sliding rods (34) are slidably connected with sliding blocks (36), the surfaces of the other ends of the two sliding rods (34) are provided with buffer springs (37), and the opposite sides of the two sliding blocks (36) are fixedly connected with the two sides of the protective cover (38).

2. A cryogenic stop valve with pressure relief according to claim 1, characterized in that: The edge of the end surface of the pressure relief pipe (12) is provided with an annular groove (15), the inner wall of the annular groove (15) is provided with a sealing washer (16), and the inner wall of the annular groove (15) can be threadedly clamped with the inner wall of the clamping sleeve (21).

3. A cryogenic stop valve with pressure relief according to claim 1, characterized in that: The inner wall of the fixed pipe (22) is provided with a cavity groove, the inner wall of the cavity groove is provided with a plurality of guide rods (27), the surfaces of the plurality of guide rods (27) are slidably connected with pressure relief blocks (28), the surfaces of the other ends of the plurality of guide rods (27) are provided with return springs (29), and the surface of one end of the pressure relief block (28) is provided with two sealing lubricating rings (210).

4. A cryogenic stop valve with pressure relief according to claim 3, characterized in that: One side of the inner wall of the cavity groove is provided with a pressure relief hole (211), the inner wall of the pressure relief hole (211) is fixedly connected with one end of the communication pipe (25), and the other end of the communication pipe (25) is threadedly fixed with the end surface of the joint (14) through a locking ring (212).

5. A cryogenic stop valve with pressure relief according to claim 1, characterized in that: The surfaces of the two abutting blocks (31) are provided with two mounting holes (39), the inner walls of the two groups of mounting holes (39) are connected with the two groups of butt joints (17) provided on the surface of the valve body (1) by mounting pins (310).

6. A cryogenic stop valve with pressure relief according to claim 1, characterized in that: The opposite ends of the two abutting blocks (31) are provided with arc-shaped grooves, and the inner walls of the two arc-shaped grooves are slidably connected with the surface of the protective cover (38).

7. A cryogenic stop valve with pressure relief according to claim 1, characterized in that: The adjusting valve rod (11) is arranged in the inner wall of the valve sleeve arranged in the middle of the top of the valve body (1).

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