Low-temperature valve convenient to disassemble, assemble and maintain

Abstract

The utility model relates to the technical field of low-temperature valves convenient to disassemble and assemble, and discloses a low-temperature valve convenient to disassemble and maintain, which comprises a valve pipe I. The left side and the right side of the outer wall of the valve pipe I are provided with valve pipes II, and the outer walls of the valve pipes II and the valve pipe I are fixedly connected with circular plates. The outer wall of one circular plate is rotationally connected with a mounting circular sleeve, a clamping groove is formed in the inner wall of the mounting circular sleeve, the multiple circular plates are clamped on the inner wall of the clamping groove, the rear side of the outer wall of the mounting circular sleeve is slidably connected with a second threaded shaft, and the top of the outer wall of the second threaded shaft is in threaded connection with a threaded rotating plate; first fixing plates are fixedly connected to the upper end and the lower end of the front side of the outer wall of the mounting circular sleeve. According to the valve, the circular plates are fixed to the outer wall of the first valve pipe and the outer wall of the second valve pipe, the second valve pipe and the first valve pipe are connected and fixed, and therefore the valve can be rapidly disassembled and maintained conveniently.

Description

TECHNICAL FIELD

[0001] The utility model relates to low temperature valve technical field convenient to dismount especially, it relates to a low temperature valve convenient to dismount maintenance. BACKGROUND

[0002] In the energy field, low temperature valves are widely used in the storage and transportation of liquefied natural gas and hydrogen low-temperature medium, and the industry is booming. The storage temperature is as low as minus one hundred and sixty-two degrees. In the inlet and outlet pipelines of storage tanks and the transportation pipe network of gasification stations, low temperature valves bear the key task of controlling medium flow and cutting off flow. In the receiving station, a large number of low-temperature ball valves and gate valves are used to control the unloading, storage and electrification process, ensuring the safe and stable operation of the entire process. Hydrogen is an important carrier of clean energy in the future, and its production, liquefaction and transportation process cannot be separated from low-temperature valves. Because hydrogen is flammable and explosive, and its molecular activity characteristics are special at low temperature, the performance requirements for low-temperature valves are extremely strict. The normal operation of the valve is directly related to the safety and efficiency of the hydrogen energy industry chain. At the same time, in industrial production, air separation equipment and petroleum chemical tail gas separation devices, low-temperature valves are used to accurately control the flow of low-temperature gas and liquid, realizing the separation and purification process of products. In air separation equipment, low-temperature stop valves and throttling valves are used to control the flow of liquid nitrogen, liquid oxygen and liquid argon low-temperature liquids, ensuring the separation accuracy of each component, so as to produce high-purity gas products. In the field of scientific research, low-temperature valves play an irreplaceable role in low-temperature superconducting experiments and low-temperature physical research.

[0003] The low-temperature valve on the market is mainly composed of a sealing component and a driving component. In order to meet the sealing and heat preservation requirements in a low-temperature environment, a traditional low-temperature valve often adopts a relatively complex structure. Some low-temperature valves adopt a multi-layer sealing structure, including a metal sealing ring and a rubber sealing gasket, in order to enhance the sealing performance. These sealing components are installed in a small space and are nested with each other. During maintenance, the disassembly process is extremely tedious, and professional tools and rich experience are required. A slight carelessness may damage the sealing components, resulting in an increase in maintenance cost. In addition, the connection mode between the valve body and the valve cover and the valve rod component of the traditional low-temperature valve is mostly bolt fastening. In a low-temperature environment, the bolts are prone to rust, further increasing the disassembly difficulty and prolonging the maintenance time, affecting the normal operation of the equipment. At the same time, due to the difficulty in disassembly and maintenance of the traditional low-temperature valve and the complex maintenance environment, the maintenance cost is high. A large amount of manpower, material resources and time cost are required during the maintenance process, including the training cost of professional maintenance personnel, the purchase cost of special tools and the production loss caused by equipment downtime. Moreover, the general performance of the components of the traditional low-temperature valve is poor. Once the components are damaged, special replacement parts need to be customized. The time is long, further prolonging the equipment downtime and reducing the production efficiency. In the maintenance of the low-temperature valve of a transport ship, the maintenance difficulty is greater due to the special sea operation environment. Once the valve fails, not only the maintenance cost is high, but also the transport task may be delayed, causing huge economic losses. Content of the utility model

[0004] In order to make up for the above shortcomings, the utility model provides a low-temperature valve convenient to disassemble and maintain, aiming at improving the problem that the traditional low-temperature valve is difficult to disassemble and maintain in the prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a low-temperature valve convenient to disassemble and maintain, comprising a valve pipe one, the outer wall left and right sides of the valve pipe one are both installed with a valve pipe two, the outer wall of a plurality of valve pipe twos and valve pipe one is all fixedly connected with a circular plate, the outer wall of another circular plate is rotatably connected with a mounting round sleeve, the inner wall of the mounting round sleeve is provided with a clamping groove, a plurality of circular plates are clamped in the inner wall of the clamping groove, the outer wall rear side of the mounting round sleeve is slidably connected with a threaded shaft two, the outer wall top of the threaded shaft two is threadedly connected with a threaded rotating plate, the outer wall front side of the mounting round sleeve is fixedly connected with a fixed plate one on the upper and lower ends, the inner wall of a plurality of fixed plate ones is rotatably connected with a rotating shaft, the outer wall left and right sides of the rotating shaft are both rotatably connected with a connecting plate, the inner wall of the rotating shaft is threadedly connected with a fixed threaded shaft at both ends, the left and right sides of the inner wall of the mounting round sleeve are both fixedly connected with a waterproof sealing strip, the left and right sides of the valve pipe one are provided with a sealing mechanism, and the sealing mechanism is used for sealing when the pipeline is connected.

[0006] Further description is made to the above technical scheme:

[0007] The sealing mechanism comprises a plurality of fixed circular plates one, the outer walls of the plurality of fixed circular plates one are fixed on the left and right sides of the outer wall of the valve pipe one, the distal sides of the two fixed circular plates one are fixedly connected with a plurality of latches around the middle part, the outer walls of the plurality of latches are slidably connected with fixed circular plates two, the outer walls of the fixed circular plates two and the fixed circular plates one are threadedly connected with threaded shafts one around, the inner wall of the fixed circular plates two is fixedly connected with a connecting pipe one, the outer wall of the connecting pipe one is provided with sliding grooves around the inner side, the distal sides of the outer walls of the middle part of the two fixed circular plates one are fixedly connected with clamping plates around, the outer walls of the plurality of clamping plates are in contact with corresponding sliding grooves, the distal sides of the outer walls of the middle part of the two fixed circular plates one are fixedly connected with circular plug plates, and the outer wall of the circular plug plate is in sliding contact with the inner wall of the connecting pipe one.

[0008] As a further description of the above technical solutions:

[0009] The outer walls of the fixed circular plates one and the fixed circular plates two are fixedly connected with soft pads around, and the outer wall of the mounting circular sleeve is fixedly connected with soft strips on the upper and lower ends of the rear side.

[0010] As a further description of the above technical solutions:

[0011] The top of the valve pipe one is fixedly connected with a fixed circular plate three, and the outer wall of the fixed circular plate three is threadedly connected with hexagonal nuts around the top.

[0012] As a further description of the above technical solutions:

[0013] The top of the fixed circular plate three is fixedly connected with a connecting pipe two, and the outer wall of the connecting pipe two is fixedly connected with a circular iron sheet near the top.

[0014] As a further description of the above technical solutions:

[0015] The top of the circular iron sheet is fixedly connected with protective pads around, and the inner wall of the circular iron sheet is threadedly connected with a threaded shaft three at the top.

[0016] As a further description of the above technical solutions:

[0017] The outer wall of the connecting pipe two is fixedly connected with fixed plates on the front and back sides of the bottom, and the outer walls of the plurality of fixed plate two are fixedly connected with protective strips on the left and right sides.

[0018] As a further description of the above technical solutions:

[0019] The outer wall of the threaded shaft three is slidably connected with a sliding plate in the middle part, and the inner walls of the sliding plate are threadedly connected with connecting threaded shafts on the left and right sides.

[0020] The utility model has the advantages of the following:

[0021] 1、 the utility model discloses, in the outer wall of valve pipe one and valve pipe two, circular plate is fixed, through installing the circular sleeve and be connected to valve pipe one and valve pipe two, make the circular plate fixed on valve pipe one and valve pipe two, can be clamped on the inner wall of installing circular sleeve and open the clamping groove, simultaneously in the outer wall of installing circular sleeve front side upper end fixed, its inner wall rotation's rotating shaft, finally through the threaded rotating plate of valve pipe two rear side rotation on the outer wall of threaded shaft no. 2, the connection of valve pipe two and valve pipe one is fixed, thereby facilitate the quick disassembly maintenance of valve.

[0022] 2、 the utility model discloses, in order to make valve when connecting pipeline can guarantee its sealing, on the outer wall of valve pipe two, fixed circular plate one is fixed, through fixed circular plate one outer wall near the middle of multiple snap-in fastenings on the corresponding hole on fixed circular plate two, simultaneously fixed circular plate one outer wall four -around fixed clamping plate can be slidably clamped on the sliding slot on the outer wall of connecting pipe one, and the circular plug -in board can be clamped on the inner wall of connecting pipe one, thereby make the sealing of pipeline when connecting, satisfy the use demand. ACCURACY OF DRAWINGS

[0023] Figure 1 it is a valve pipe one front side perspective drawing of the low temperature valve convenient to disassembly maintenance that the utility model proposes;

[0024] Figure 2 it is the connecting pipe one structural drawing of the low temperature valve convenient to disassembly maintenance that the utility model proposes;

[0025] Figure 3 it is the valve pipe two partial structural drawing of the low temperature valve convenient to disassembly maintenance that the utility model proposes;

[0026] Figure 4 it is the installing circular sleeve structure display drawing of the low temperature valve convenient to disassembly maintenance that the utility model proposes;

[0027] Figure 5 it is the fixed circular plate two structure schematic view of the low temperature valve convenient to disassembly maintenance that the utility model proposes.

[0028] LEGEND:

[0029] 1, valve pipe one; 2, sealing mechanism; 201, fixed round plate one; 202, clamping plate; 203, bolt; 204, sliding groove; 205, connecting pipe one; 206, fixed round plate two; 207, round plug; 208, threaded shaft one; 3, round plate; 4, valve pipe two; 5, mounting round sleeve; 6, clamping groove; 7, threaded shaft two; 8, threaded rotating plate; 9, fixed plate one; 10, rotating shaft; 11, fixed threaded shaft; 12, connecting plate; 13, soft strip; 14, fixed round plate three; 15, hexagonal nut; 16, soft pad; 17, connecting pipe two; 18, round iron sheet; 19, protective pad; 20, fixed plate two; 21, protective strip; 22, sliding plate; 23, threaded shaft three; 24, connecting threaded shaft; 25, waterproof sealing strip. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0031] Please refer to the drawings in the embodiments of the utility model Figure 2 - the drawings in the embodiments of the utility model Figure 4 An embodiment provided by the utility model: a low-temperature valve convenient to disassemble, assemble and maintain, comprising valve pipe one 1, the outer wall left and right sides of valve pipe one 1 are provided with valve pipe two 4, a plurality of valve pipe two 4 and the outer wall of valve pipe one 1 are fixedly connected with round plate 3, the outer wall of another round plate 3 is rotationally connected with mounting round sleeve 5, the inner wall of mounting round sleeve 5 is provided with clamping groove 6, a plurality of round plate 3 are clamped in the inner wall of clamping groove 6, the outer wall rear side of mounting round sleeve 5 is slidingly connected with threaded shaft two 7, the outer wall top of threaded shaft two 7 is screwedly connected with threaded rotating plate 8, the outer wall front side of mounting round sleeve 5 is fixedly connected with fixed plate one 9, the inner wall of a plurality of fixed plate one 9 is rotationally connected with rotating shaft 10, the outer wall left and right sides of rotating shaft 10 are rotationally connected with connecting plate 12, the outer wall rear side of mounting round sleeve 5 is connected with threaded shaft two 7 in a sliding connection mode, and the outer wall top of threaded shaft two 7 is connected with threaded rotating plate 8 in a threaded connection mode. The outer wall front side of mounting round sleeve 5 is fixedly connected with fixed plate one 9 at both ends, the inner wall of these fixed plate one 9 is rotationally connected with rotating shaft 10, the inner wall both ends of rotating shaft 10 are screwedly connected with fixed threaded shaft 11, the left and right sides of the inner wall of mounting round sleeve 5 are fixedly connected with waterproof sealing strip 25, the left and right sides of valve pipe one 1 are provided with sealing mechanism 2, sealing mechanism 2 is used for sealing when connecting pipes.

[0032] Specifically, the valve pipe two 4 is installed on the left and right sides of the outer wall of the valve pipe one 1, the valve pipe two 4 is connected with the plurality of circular plates 3 through the fixed connection with the outer wall of the valve pipe one 1, the outer wall of the plurality of circular plates 3 is connected with the installation circular sleeve 5 through the rotary connection, the inner wall of the installation circular sleeve 5 is provided with the clamping groove 6, the plurality of circular plates 3 are clamped in the inner wall of the clamping groove 6, so as to ensure the stability of the connection, the outer wall of the rotary shaft 10 is connected with the connecting plate 12 through the rotary connection on the left and right sides, the inner wall of the rotary shaft 10 is connected with the fixed threaded shaft 11 through the threaded connection on both ends, in addition, the left and right sides of the valve pipe one 1 are provided with the sealing mechanism 2, the sealing mechanism 2 plays a sealing role when the pipeline is connected, so as to ensure the tightness of the pipeline connection and prevent the leakage and other problems.

[0033] Please refer to the attached drawings Figure 3 - the attached drawings Figure 5 The sealing mechanism 2 comprises a fixed circular plate one 201, the outer wall of the plurality of fixed circular plate one 201 is fixed on the left and right sides of the outer wall of the valve pipe one 1, the far side of the two fixed circular plate one 201 close to the middle is fixedly connected with the latch 203, the outer wall of the plurality of latch 203 is slidably connected with the fixed circular plate two 206, the outer wall of the fixed circular plate two 206 and the fixed circular plate one 201 is threadedly connected with the threaded shaft one 208, the inner wall of the fixed circular plate two 206 is fixedly connected with the connecting pipe one 205, the outer wall of the connecting pipe one 205 is provided with the sliding groove 204 on the inner side of the four around, the outer wall of the two fixed circular plate one 201 is fixedly connected with the clamping plate 202 on the four around of the far side of the middle, the outer wall of the plurality of clamping plate 202 is in contact with the corresponding sliding groove 204, the outer wall of the two fixed circular plate one 201 is fixedly connected with the clamping plate 202 on the four around of the far side of the middle, the outer wall of the plurality of clamping plate 202 is in contact with the corresponding sliding groove 204, so as to ensure that the clamping plate 202 can move smoothly in the sliding groove 204, the outer wall of the two fixed circular plate one 201 is fixedly connected with the circular plug plate 207 on the far side of the middle, the outer wall of the circular plug plate 207 is in sliding connection with the inner wall of the connecting pipe one 205;

[0034] Specifically, the outer wall of the fixed circular plate two 206 is slidably connected with the outer wall of the latch 203, so that the fixed circular plate two 206 can slide on the latch 203, and the outer wall of the fixed circular plate two 206 and the outer wall of the fixed circular plate one 201 are threadedly connected with the threaded shaft one 208, in addition, the inner wall of the fixed circular plate two 206 is fixedly connected with the connecting pipe one 205, and the outer wall of the connecting pipe one 205 is provided with sliding grooves 204 around the inner side, which provide sliding paths for the clamping plates 202, and finally, the outer wall of the circular plug plate 207 is slidably connected with the inner wall of the connecting pipe one 205, which makes the circular plug plate 207 can slide in the connecting pipe one 205, so as to realize more flexible structure adjustment.

[0035] Please refer to the attached drawings Figure 1 - the attached drawings Figure 3 The outer wall of the fixed circular plate one 201 and the outer wall of the fixed circular plate two 206 are fixedly connected with the soft pads 16, the outer wall of the mounting circular sleeve 5 is fixedly connected with the soft strips 13 on the upper and lower ends of the rear side, the top of the valve pipe one 1 is fixedly connected with the fixed circular plate three 14, the outer wall of the fixed circular plate three 14 is threadedly connected with the hexagonal nuts 15 around the top, the top of the valve pipe one 1 is fixedly connected with the fixed circular plate three 14, and the outer wall of the fixed circular plate three 14 is threadedly connected with the hexagonal nuts 15 around the top. This connection mode can ensure the close combination of the fixed circular plate three 14 and the valve pipe one 1, and the hexagonal nuts 15 are convenient for operators to adjust and fasten, the top of the fixed circular plate three 14 is fixedly connected with the connecting pipe two 17, and the outer wall of the connecting pipe two 17 is fixedly connected with the circular iron sheet 18 near the top.

[0036] Specifically, the outer wall of the fixed circular plate one 201 and the outer wall of the fixed circular plate two 206 are fixedly connected with the soft pads 16, which are provided to provide additional protection and cushioning during installation and use, to reduce damage caused by vibration or impact, the outer wall of the mounting circular sleeve 5 is fixedly connected with the soft strips 13 on the upper and lower ends of the rear side, which also play a protective role, the top of the fixed circular plate three 14 is fixedly connected with the connecting pipe two 17, and the outer wall of the connecting pipe two 17 is fixedly connected with the circular iron sheet 18 near the top. The circular iron sheet 18 is provided to increase the strength and stability of the connecting pipe two 17.

[0037] Please refer to the attached drawings Figure 1 - the attached drawings Figure 3, The top of the circular iron sheet 18 is fixedly connected with a protective pad 19 around the circumference, a threaded shaft three 23 is threadedly connected to the inner wall top of the circular iron sheet 18, the outer wall bottom of the connecting pipe two 17 is fixedly connected with a fixed plate two 20 on the front and rear sides, a plurality of fixed plate two 20s are fixedly connected with a protective strip 21 on the left and right sides of the outer wall, a sliding plate 22 is slidably connected to the outer wall middle portion of the threaded shaft three 23, a plurality of fixed plate two 20s are provided with a protective strip 21 on the left and right sides of the outer wall, the protective strip 21 is arranged to prevent scratching or damage caused by external force during use, the outer wall middle portion of the threaded shaft three 23 is slidably connected with the sliding plate 22, and the sliding plate 22 can freely slide on the threaded shaft three 23 to adapt to different use requirements, and a connecting threaded shaft 24 is threadedly connected to the inner wall left and right sides of the sliding plate 22;

[0038] Specifically, the protective pads 19 are fixedly connected around the top edge of the circular iron sheet 18 to be threadedly connected with the threaded shaft three 23, so that the firm combination between the shaft and the iron sheet is ensured, the outer wall bottom of the connecting pipe two 17 is fixedly provided with the fixed plate two 20 on the front and rear sides, the fixed plate two 20 serves to enhance the stability of the connecting pipe two 17 and ensure the stability during use, and the inner wall left and right sides of the sliding plate 22 are provided with threaded holes for threadedly connecting the threaded shaft 24, so that the connection strength between the sliding plate 22 and the threaded shaft three 23 is enhanced, and the stability and reliability of the entire device during operation are ensured.

[0039] Working principle: The circular plates 3 are fixed to the outer walls of the valve pipe one 1 and the valve pipe two 4, the valve pipe one 1 and the valve pipe two 4 are connected by installing the circular sleeve 5, so that the circular plates 3 fixed to the valve pipe one 1 and the valve pipe two 4 can be clamped on the inner wall of the circular sleeve 5, the clamping groove 6 is provided, the fixed plate one 9 is fixed to the outer wall front side of the circular sleeve 5, the rotating shaft 10 is rotatably arranged in the inner wall, the connecting plate 12 is connected to the upper and lower fixed plate one 9, and the connecting plate 12 can be quickly and freely rotated when disassembled, a plurality of holes are provided in the outer wall of the connecting plate 12 to adapt to different sizes of valves for free adjustment during installation, finally, the threaded rotating plate 8 on the rear side of the valve pipe two 4 is rotated on the outer wall of the threaded shaft two 7, and the connection of the valve pipe two 4 and the valve pipe one 1 is fixed, so as to facilitate the quick disassembly and maintenance of the valve;

[0040] In order to make the valve can guarantee its sealing when connecting pipeline, the outer wall of the valve pipe two 4 is fixed with the fixed circular plate one 201, the multiple plugs 203 on the outer wall of the fixed circular plate one 201 near the middle part are clamped on the corresponding holes of the fixed circular plate two 206, the clamping plate 202 fixed on the outer wall of the fixed circular plate one 201 can be slidably clamped on the sliding groove 204 on the outer wall of the connecting pipe one 205, and the circular plug plate 207 can be clamped on the inner wall of the connecting pipe one 205, so that the sealing of the pipeline when connecting, meet the use demand.

[0041] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing embodiments of the present application are described in detail, for the skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included in the scope of the present application.

Claims

1. A cryogenic valve which is easy to disassemble and maintain, comprising a valve tube (1), characterized in that: The outer wall of the valve pipe one (1) is provided with the valve pipe two (4) on the left and right sides, a plurality of the valve pipe two (4) and the outer wall of the valve pipe one (1) are fixedly connected with the circular plate (3), the outer wall of the other circular plate (3) is rotatably connected with the mounting round sleeve (5), the inner wall of the mounting round sleeve (5) is provided with the clamping groove (6), a plurality of the circular plate (3) are clamped on the inner wall of the clamping groove (6), the outer wall rear side of the mounting round sleeve (5) is slidably connected with the threaded shaft two (7), the outer wall top of the threaded shaft two (7) is screwedly connected with the threaded rotating plate (8), the outer wall front side of the mounting round sleeve (5) is fixedly connected with the fixed plate one (9) on the upper and lower ends, the inner wall of a plurality of the fixed plate one (9) is rotatably connected with the rotating shaft (10), the outer wall left and right sides of the rotating shaft (10) are rotatably connected with the connecting plate (12), the inner wall of the rotating shaft (10) is screwedly connected with the fixed threaded shaft (11) on both ends, the left and right sides of the mounting round sleeve (5) are fixedly connected with the waterproof sealing strips (25), the left and right sides of the valve pipe one (1) are provided with the sealing mechanism (2), and the sealing mechanism (2) is used for sealing when the pipeline is connected.

2. The cryogenic valve of claim 1, wherein: The sealing mechanism (2) comprises a fixed circular plate one (201), the outer wall of a plurality of the fixed circular plate one (201) is fixed on the outer wall left and right sides of the valve pipe one (1), the outer wall of the two fixed circular plate one (201) is fixedly connected with the latch (203) on the side away from each other and close to the middle four around, the outer wall of a plurality of the latch (203) is slidably connected with the fixed circular plate two (206), the outer wall of the fixed circular plate two (206) and the fixed circular plate one (201) is screwedly connected with the threaded shaft one (208) around, the inner wall of the fixed circular plate two (206) is fixedly connected with the connecting pipe one (205), the outer wall inner side of the connecting pipe one (205) is provided with the sliding groove (204) around, the outer wall middle part of the two fixed circular plate one (201) is fixedly connected with the clamping plate (202) on the side away from each other and around, the outer wall of a plurality of the clamping plate (202) is in contact with the corresponding sliding groove (204), the outer wall middle part of the two fixed circular plate one (201) is fixedly connected with the circular plug plate (207) on the side away from each other, and the outer wall of the circular plug plate (207) is slidably connected with the inner wall of the connecting pipe one (205).

3. The cryogenic valve of claim 2, wherein: The outer wall of the fixed circular plate one (201) and the fixed circular plate two (206) is fixedly connected with the soft pad (16) around, and the outer wall rear side of the mounting round sleeve (5) is fixedly connected with the soft strip (13) on the upper and lower ends.

4. The cryogenic valve of claim 1, wherein: The top of the valve pipe one (1) is fixedly connected with the fixed circular plate three (14), and the outer wall top of the fixed circular plate three (14) is screwedly connected with the hexagon nut (15) around.

5. The cryogenic valve of claim 4, wherein: The top of the fixed circular plate three (14) is fixedly connected with the connecting pipe two (17), and the outer wall of the connecting pipe two (17) is fixedly connected with the circular iron sheet (18) close to the top.

6. The cryogenic valve of claim 5, wherein: The top of the circular iron sheet (18) is fixedly connected with a protective pad (19), and the inner wall top of the circular iron sheet (18) is threadedly connected with a threaded shaft three (23).

7. The cryogenic valve of claim 5, wherein: The outer wall bottom of the connecting pipe two (17) is fixedly connected with a fixed plate two (20) on the front and rear sides, and the outer wall left and right sides of a plurality of fixed plate two (20) are fixedly connected with a protective strip (21).

8. The cryogenic valve of claim 6, wherein: The outer wall middle part of the threaded shaft three (23) is slidably connected with a sliding plate (22), and the inner wall left and right sides of the sliding plate (22) are threadedly connected with a connecting threaded shaft (24).

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