Liquid helium and liquid hydrogen valve

Abstract

The invention belongs to the field of low-temperature valves, particularly relates to a liquid helium and liquid hydrogen valve, and provides the following scheme aiming at the problems that a vacuum heat insulation layer of an existing valve is common in cold insulation effect, the vacuum degree can be continuously reduced along with use, and the existing valve is inconvenient to mount and dismount: the liquid helium and liquid hydrogen valve comprises a lower valve body and an upper valve body, and the upper valve body is positioned right above the lower valve body; a mounting hole is formed in the middle of the top of the lower valve body, an internal thread is arranged on the inner wall of the mounting hole, an external thread is arranged on the outer wall of the upper valve body, and the external thread is in threaded connection with the internal thread. The two semi-arc-shaped blocks abut against each other, the sealing performance of the device is guaranteed, the first flange and the second flange can be rapidly mounted through the two mounting cylinders, external tools are not needed, the dismounting and mounting difficulty can be lowered, and the workload of workers is lowered.

Description

Technical Field

[0001] The present invention relates to the technical field of cryogenic valves, and in particular to a liquid helium and liquid hydrogen valve. Background Art

[0002] Cryogenic valves are valves whose media temperature is within a specific low temperature range, usually between -40℃ and -196℃. Cryogenic valves are specially designed to work under low temperature conditions and can maintain good sealing performance and reliable working stability.

[0003] When transporting liquid helium and liquid hydrogen, a cryogenic valve is required. However, the cryogenic valve still has the following defects when used:

[0004] 1. Generally, metal interlayer is used to form a vacuum insulation layer to keep the temperature low. However, the cooling effect of a single vacuum insulation layer is average, and the vacuum degree will continue to decrease with use.

[0005] 2. When connecting the pipe and the valve, multiple bolts are required for connection. The overall operation is too complicated and inconvenient to install and disassemble. Summary of the invention

[0006] The purpose of the present invention is to solve the problems existing in the prior art that a metal interlayer is generally used to form a vacuum insulation layer for cold preservation, but the cold preservation effect of a single vacuum insulation layer is general, and the vacuum degree will continue to decrease with use, and when connecting the pipeline and the valve, multiple bolts are required for connection, the overall operation is too cumbersome, and it is not convenient to install and disassemble, and a liquid helium and liquid hydrogen valve is proposed.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A liquid helium and liquid hydrogen valve, comprising a lower valve body and an upper valve body, wherein the upper valve body is located directly above the lower valve body, a mounting hole is provided at the middle position of the top of the lower valve body, an inner wall of the mounting hole is provided with an internal thread, an outer wall of the upper valve body is provided with an external thread, the external thread is threadedly connected with the internal thread, a liquid inlet hole and a liquid discharge hole are respectively provided at two ends of the lower valve body, two L-shaped plates arranged symmetrically with respect to the center are fixedly connected to the inner wall of the lower valve body, a connecting hole is formed between the two L-shaped plates, the connecting hole is used to connect the liquid inlet hole and the liquid discharge hole, and a control component for controlling the opening and closing of the valve is provided inside the upper valve body;

[0009] The outer wall of the lower valve body is provided with a vacuum component for ensuring a vacuum environment of the valve body;

[0010] It also includes two symmetrically arranged connecting pipes, one end of which is provided with a first flange, and both ends of the lower valve body are provided with second flanges, a plurality of circular holes are provided inside the first flange and the second flange, and both ends of the outer wall of the lower valve body are provided with mounting components for mounting the first flange and the second flange.

[0011] In one possible design, the control assembly includes a valve stem threadedly extending through the interior of the upper valve body, the top of the valve stem is fixedly connected to an operating disk, the bottom of the valve stem is fixedly connected to a valve flap, the interior of the lower valve body is slidably connected to a sliding circular plate, the sliding circular plate is located directly above the connecting hole and is used to seal the connecting hole, and the valve flap is located above the sliding circular plate.

[0012] In a possible design, the vacuum assembly includes an insulation sleeve fixedly mounted on the outer wall of the lower valve body, both ends of the insulation sleeve are provided with openings, the outer wall sliding sleeve of the lower valve body is provided with two symmetrically arranged push rings, the two push rings are respectively located at the two ends of the insulation sleeve, and a vacuum pump is arranged at the bottom of the insulation sleeve.

[0013] In a possible design, the mounting assembly includes two semi-arc cylinders, and a semi-arc block is fixedly connected to the inner wall of one side of the two semi-arc cylinders, and the semi-arc block is used in conjunction with a push ring.

[0014] In a possible design, the mounting assembly also includes two symmetrically arranged first semi-arc plates, one side of each of the two first semi-arc plates is fixedly connected with a plurality of insertion rods, one side of the first semi-arc plates is fixedly connected with two symmetrically arranged semicircular blocks, the two corresponding semicircular blocks are used in conjunction with each other, and the insertion rods and the semicircular blocks are both used in conjunction with the circular holes.

[0015] In a possible design, an arc-shaped slide groove is provided on one side of the first semi-arc plate, a slider is slidably connected inside the arc-shaped slide groove, one end of the slider is fixedly connected to the second semi-arc plate, two symmetrically arranged positioning grooves are provided inside the second semi-arc plate, and two symmetrically arranged clamping grooves are provided on one side of the second semi-arc plate close to the first semi-arc plate.

[0016] In a possible design, a vertical groove is provided at the top of the first semi-arc plate, a horizontal groove is provided at one side of the first semi-arc plate, a card plate is slidably passed through the interior of the horizontal groove, the card plate is engaged with the slot, an oblique groove is provided at the top of the card plate, a spring is fixedly connected between one end of the card plate and an inner wall of one side of the horizontal groove, a push rod is fixedly connected to the top of the first semi-arc plate, and the push rod is used in conjunction with the corresponding vertical groove and oblique groove.

[0017] In a possible design, it also includes two mounting cylinders, which are symmetrically arranged at both ends of the lower valve body, an annular block is fixedly connected to the inner wall of one side of the mounting cylinder, four positioning rods symmetrical in pairs are fixedly connected to one side of the annular block, the positioning rods are engaged with the positioning grooves, a threaded rod is fixedly connected to one side of the mounting cylinder, and the outer walls of the two threaded rods are threadedly sleeved with the same threaded sleeve.

[0018] In a possible design, the sides of the two mounting cylinders that are close to each other are respectively fixedly connected with an outer sleeve and an inner sliding rod, and the inner sliding rod slides through the interior of the outer sleeve.

[0019] In the present application, when in use, liquid helium and liquid hydrogen are fed into the interior of the lower valve body through the liquid inlet hole, enter the interior of the communicating hole, and then are discharged through the liquid discharge hole. When the valve needs to be closed, the operating disk is rotated, the operating disk drives the valve stem to rotate, and the valve stem drives the valve disc to move downward. At this time, the valve disc pushes the sliding circular plate to move downward, and the sliding circular plate blocks the communicating hole, thereby closing the valve.

[0020] When installing the connecting pipe and the lower valve body, the first flange and the second flange can be fitted together, and then the two semi-arc cylinders can be symmetrically arranged and placed on the outside of the lower valve body. At this time, the two semi-arc cylinders can be fitted together, and the semi-arc blocks are located on one side of the push ring after forming a circular ring. Then the first semi-arc plate is moved horizontally, and the first semi-arc plate drives multiple plug rods to approach each other, and the plug rods are inserted into the corresponding circular holes, so that the first flange and the second flange can be connected;

[0021] When the two first semi-arc plates are close to each other, the corresponding push rods are inserted into the appropriate vertical slots, and the push rods enter the inclined slots, thereby pushing the clamping plate to move horizontally. The clamping plate squeezes the spring and enters the horizontal slot. At this time, the clamping plate is no longer engaged with the clamping slot, and the braking state of the second semi-arc plate is released;

[0022] At this time, the two second semi-arc plates can rotate, and the second semi-arc plates drive the slider to rotate inside the arc-shaped slide groove. When the two second semi-arc plates rotate ninety degrees, the four positioning grooves rotate to a position that fits the positioning rod, and then rotate the threaded sleeve, the threaded sleeve drives the two threaded rods to approach each other, the two threaded rods drive the two mounting tubes to approach each other, the two mounting tubes drive the annular block to move laterally, the annular block drives the positioning rod to move laterally, the positioning rod is inserted into the positioning groove to brake the second semi-arc plate, and the space between the insulation sleeve and the lower valve body is evacuated by a vacuum pump. At this time, the push ring slides on the inner wall of the lower valve body and presses the two semi-arc blocks tightly to ensure the sealing of the device.

[0023] Beneficial effects:

[0024] In the present invention, the liquid helium and liquid hydrogen valve can achieve the effect of heat preservation of the temperature inside the lower valve body through the vacuum component, thereby reducing heat loss;

[0025] In the present invention, the liquid helium and liquid hydrogen valve can achieve the effect of quickly installing the connecting pipe and the lower valve body through the installation assembly, and does not require the use of external tools, thereby reducing the difficulty of disassembly and installation and reducing the workload of workers;

[0026] In the present invention, a vacuum is drawn into the space between the heat-insulating sleeve and the lower valve body through a vacuum pump. At this time, the push ring slides on the inner wall of the lower valve body and presses the two semi-arc blocks tightly to ensure the sealing of the device. In addition, two installation tubes can be used to complete the rapid installation process of the first flange and the second flange without the aid of external tools, thereby reducing the difficulty of disassembly and installation and reducing the workload of workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the three-dimensional structure of a liquid helium and liquid hydrogen valve proposed by the present invention;

[0028] Figure 2 This is a schematic diagram of the three-dimensional structure of two mounting cylinders in a liquid helium and liquid hydrogen valve proposed by the present invention;

[0029] Figure 3 This is a schematic diagram of the three-dimensional structure of an upper valve body and a thermal insulation sleeve in a liquid helium and liquid hydrogen valve proposed by the present invention;

[0030] Figure 4 This is a schematic diagram of a three-dimensional cross-sectional structure of a lower valve body in a liquid helium and liquid hydrogen valve proposed by the present invention;

[0031] Figure 5 This is a schematic diagram of the three-dimensional structure of two semi-arc-shaped cylinders in a liquid helium and liquid hydrogen valve proposed by the present invention;

[0032] Figure 6 This is a schematic diagram of the explosion structure of two semi-arc-shaped cylinders in a liquid helium and liquid hydrogen valve proposed by the present invention;

[0033] Figure 7 A schematic diagram of the explosion structure of the second semi-arc plate and the first semi-arc plate in a liquid helium and liquid hydrogen valve proposed by the present invention;

[0034] Figure 8 This is a schematic diagram of a three-dimensional cross-sectional structure of a first semi-arc plate in a liquid helium and liquid hydrogen valve proposed by the present invention;

[0035] Fig. 9 This is a schematic diagram of the three-dimensional structure of an arc-shaped slide groove and a slider in a liquid helium and liquid hydrogen valve proposed by the present invention.

[0036] In the figure: 1, connecting pipe; 2, semi-arc cylinder; 3, upper valve body; 4, operating panel; 5, valve stem; 6, insulation sleeve; 7, mounting cylinder; 8, threaded sleeve; 9, vacuum pump; 10, threaded rod; 11, outer sleeve; 12, inner sliding rod; 13, positioning rod; 14, annular block; 15, first flange; 16, second flange; 17, L-shaped plate; 18, sliding circular plate; 19, lower valve body; 20, round hole; 21, external thread; 22. First semi-arc plate; 23. Insert rod; 24. Positioning groove; 25. Second semi-arc plate; 26. Semi-arc block; 27. Semicircular block; 28. Vertical groove; 29. ​​Push rod; 30. Clamping groove; 31. Clamping plate; 32. Oblique groove; 33. Horizontal groove; 34. Spring; 35. Valve disc; 36. Internal thread; 37. Liquid inlet hole; 38. Connecting hole; 39. Liquid discharge hole; 40. Push ring; 41. Sliding block; 42. Arc slide groove. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] Example 1

[0039] Reference Figure 1-9 A liquid helium and liquid hydrogen valve, which is used in the field of cryogenic valves, includes: a lower valve body 19 and an upper valve body 3, the upper valve body 3 is located directly above the lower valve body 19, a mounting hole is provided at the top middle position of the lower valve body 19, the inner wall of the mounting hole is provided with an internal thread 36, the outer wall of the upper valve body 3 is provided with an external thread 21, the external thread 21 is threadedly connected with the internal thread 36, the two ends of the lower valve body 19 are respectively provided with a liquid inlet hole 37 and a liquid discharge hole 39, the inner wall of the lower valve body 19 is fixedly connected with two L-shaped plates 17 arranged symmetrically with the center, a connecting hole 38 is formed between the two L-shaped plates 17, and the connecting hole 38 is used to connect the liquid inlet hole 37 and the liquid discharge hole 39, and a control component for controlling the opening and closing of the valve is provided inside the upper valve body 3, and the control component includes a thread The valve stem 5 runs through the interior of the upper valve body 3, the top of the valve stem 5 is fixedly connected with an operating disk 4, the bottom of the valve stem 5 is fixedly connected with a valve flap 35, the interior of the lower valve body 19 is slidably connected with a sliding circular plate 18, the sliding circular plate 18 is located directly above the connecting hole 38 and is used to block the connecting hole 38, the valve flap 35 is located above the sliding circular plate 18, liquid helium and liquid hydrogen are fed into the interior of the lower valve body 19 through the liquid inlet hole 37, and after entering the interior of the connecting hole 38, they are discharged through the liquid discharge hole 39. When it is necessary to close the valve, the operating disk 4 is rotated, the operating disk 4 drives the valve stem 5 to rotate, and the valve stem 5 drives the valve flap 35 to move downward, at this time the valve flap 35 pushes the sliding circular plate 18 to move downward, the sliding circular plate 18 blocks the connecting hole 38, and then the valve can be closed;

[0040] The outer wall of the lower valve body 19 is provided with a vacuum component for ensuring the vacuum environment of the valve body. The vacuum component includes a heat preservation sleeve 6 fixedly sleeved on the outer wall of the lower valve body 19. Both ends of the heat preservation sleeve 6 are provided with openings. The outer wall sliding sleeve of the lower valve body 19 is provided with two symmetrically arranged push rings 40. The two push rings 40 are respectively located at the two ends of the heat preservation sleeve 6. A vacuum pump 9 is provided at the bottom of the heat preservation sleeve 6. The space between the heat preservation sleeve 6 and the lower valve body 19 is evacuated by the vacuum pump 9. At this time, the push ring 40 slides on the inner wall of the lower valve body 19 and presses the two semi-arc blocks 26 tightly to ensure the sealing of the device.

[0041] The valve body 19 further comprises two symmetrically arranged connecting pipes 1, one end of which is provided with a first flange 15, and both ends of the lower valve body 19 are provided with second flanges 16, and a plurality of circular holes 20 are provided inside the first flange 15 and the second flange 16, and both ends of the outer wall of the lower valve body 19 are provided with mounting components for mounting the first flange 15 and the second flange 16, and the mounting components comprise two semi-arc cylinders 2, and the inner walls of one side of the two semi-arc cylinders 2 are fixedly connected with semi-arc blocks 26, and the semi-arc blocks 26 are used in conjunction with the push ring 40, and the mounting components comprise two symmetrically arranged first semi-arc plates 22, and a plurality of plug rods 23 are fixedly connected to one side of the two first semi-arc plates 22, and two symmetrically arranged semi-circular Block 27, the corresponding two semicircular blocks 27 are used in conjunction with each other, the plug rod 23 and the semicircular block 27 are used in conjunction with the circular hole 20, when the connecting pipe 1 and the lower valve body 19 are installed, the first flange 15 and the second flange 16 can be fitted together, and then the two semi-arc cylinders 2 are symmetrically arranged and placed on the outside of the lower valve body 19, at this time, the two semi-arc cylinders 2 can be fitted together, and the semi-arc block 26 is located on one side of the push ring 40 after forming a circular ring, and then the first semi-arc plate 22 is moved laterally, and the first semi-arc plate 22 drives multiple plug rods 23 to approach each other, and the plug rods 23 are inserted into the corresponding circular holes 20, so that the first flange 15 and the second flange 16 can be connected, and an arc-shaped slide groove 42 is provided on one side of the first semi-arc plate 22, and the inner slide of the arc-shaped slide groove 42 The second semi-arc plate 25 is movably connected with a slider 41, one end of the slider 41 is fixedly connected with the second semi-arc plate 25, and two symmetrically arranged positioning grooves 24 are opened inside the second semi-arc plate 25, and when the two first semi-arc plates 22 are close to each other, the corresponding push rod 29 is inserted into the inside of the appropriate vertical groove 28, and the push rod 29 enters the inside of the inclined groove 32, so as to push the card plate 31 to move horizontally, and the card plate 31 squeezes the spring 34 and enters the inside of the transverse groove 33. At this time, the card plate 31 is no longer engaged with the card groove 30, and the braking state of the second semi-arc plate 25 is released. The second semi-arc plate 25 is provided with two symmetrically arranged card grooves 30 on one side close to the first semi-arc plate 22, and the top of the first semi-arc plate 22 is provided with a vertical groove 28. 2 is provided with a transverse groove 33, and a card plate 31 is slidably penetrated inside the transverse groove 33, and the card plate 31 is engaged with the card groove 30. An oblique groove 32 is provided on the top of the card plate 31, and a spring 34 is fixedly connected between one end of the card plate 31 and an inner wall of one side of the transverse groove 33. A push rod 29 is fixedly connected to the top of the first semi-arc plate 22, and the push rod 29 is used in conjunction with the corresponding vertical groove 28 and the oblique groove 32. At this time, the two second semi-arc plates 25 can rotate, and the second semi-arc plates 25 drive the slider 41 to rotate inside the arc-shaped slide groove 42. When the two second semi-arc plates 25 rotate ninety degrees, the four positioning grooves 24 are rotated to a position that fits the positioning rod 13, and then the threaded sleeve 8 is rotated, and the threaded sleeve 8 drives the two threaded rods 10 to approach each other.The two threaded rods 10 drive the two installation tubes 7 to approach each other, the two installation tubes 7 drive the annular block 14 to move horizontally, the annular block 14 drives the positioning rod 13 to move horizontally, and the positioning rod 13 is inserted into the positioning groove 24 to brake the second semi-arc plate 25.

[0042] Example 2

[0043] refer to Figure 1-9 , improved on the basis of Example 1: it also includes two mounting tubes 7, the two mounting tubes 7 are symmetrically arranged at the two ends of the lower valve body 19, an annular block 14 is fixedly connected to the inner wall of one side of the mounting tube 7, four symmetrical positioning rods 13 are fixedly connected to one side of the annular block 14, the positioning rods 13 are engaged with the positioning groove 24, a threaded rod 10 is fixedly connected to one side of the mounting tube 7, the outer walls of the two threaded rods 10 are threadedly sleeved with the same threaded sleeve 8, and the sides of the two mounting tubes 7 close to each other are respectively fixedly connected with an outer sleeve 11 and an inner sliding rod 12, and the inner sliding rod 12 slides through the inside of the outer sleeve 11.

[0044] However, as is well known to those skilled in the art, the working principle and wiring method of the vacuum pump 9 are commonplace, and are conventional means or common knowledge, and will not be elaborated here. Those skilled in the art may make any selections according to their needs or convenience.

[0045] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A liquid helium and liquid hydrogen valve, characterized in that: include: A lower valve body (19) and an upper valve body (3), wherein the upper valve body (3) is located directly above the lower valve body (19), a mounting hole is provided at the middle position of the top of the lower valve body (19), the inner wall of the mounting hole is provided with an internal thread (36), the outer wall of the upper valve body (3) is provided with an external thread (21), the external thread (21) is threadedly connected to the internal thread (36), the two ends of the lower valve body (19) are respectively provided with a liquid inlet hole (37) and a liquid discharge hole (39), the inner wall of the lower valve body (19) is fixedly connected with two L-shaped plates (17) arranged in a central symmetric manner, a connecting hole (38) is formed between the two L-shaped plates (17), the connecting hole (38) is used to connect the liquid inlet hole (37) and the liquid discharge hole (39), and a control component for controlling the opening and closing of the valve is provided inside the upper valve body (3); The outer wall of the lower valve body (19) is provided with a vacuum component for ensuring a vacuum environment of the valve body; The valve body (19) further comprises two symmetrically arranged connecting pipes (1), one end of the connecting pipe (1) being provided with a first flange (15), both ends of the lower valve body (19) being provided with second flanges (16), a plurality of circular holes (20) being provided inside the first flange (15) and the second flange (16), and both ends of the outer wall of the lower valve body (19) being provided with mounting components for mounting the first flange (15) and the second flange (16).

2. A liquid helium and liquid hydrogen valve according to claim 1, characterized in that: The control assembly comprises a valve stem (5) threadedly penetrating the interior of the upper valve body (3); the top of the valve stem (5) is fixedly connected to an operating panel (4); the bottom of the valve stem (5) is fixedly connected to a valve flap (35); the interior of the lower valve body (19) is slidably connected to a sliding circular plate (18); the sliding circular plate (18) is located directly above the connecting hole (38) and is used to seal the connecting hole (38); the valve flap (35) is located above the sliding circular plate (18).

3. A liquid helium and liquid hydrogen valve according to claim 1, characterized in that: The vacuum assembly comprises a heat-insulating sleeve (6) fixedly sleeved on the outer wall of the lower valve body (19), both ends of the heat-insulating sleeve (6) are provided with openings, the outer wall of the lower valve body (19) is slidably sleeved with two symmetrically arranged push rings (40), the two push rings (40) are respectively located at the two ends of the heat-insulating sleeve (6), and a vacuum pump (9) is provided at the bottom of the heat-insulating sleeve (6).

4. The liquid helium and liquid hydrogen valve according to claim 1, characterized in that: The mounting assembly comprises two semi-arc cylinders (2), one inner wall of each of the two semi-arc cylinders (2) being fixedly connected with a semi-arc block (26), and the semi-arc block (26) is used in conjunction with a push ring (40).

5. The liquid helium and liquid hydrogen valve according to claim 1, characterized in that: The mounting assembly further comprises two symmetrically arranged first semi-arc plates (22), one side of each of the two first semi-arc plates (22) being fixedly connected with a plurality of insertion rods (23), one side of each of the first semi-arc plates (22) being fixedly connected with two symmetrically arranged semicircular blocks (27), the two corresponding semicircular blocks (27) being used in conjunction with each other, and the insertion rods (23) and the semicircular blocks (27) being used in conjunction with the circular holes (20).

6. A liquid helium and liquid hydrogen valve according to claim 5, characterized in that: An arc-shaped slide groove (42) is provided on one side of the first semi-arc-shaped plate (22), a slider (41) is slidably connected inside the arc-shaped slide groove (42), one end of the slider (41) is fixedly connected to a second semi-arc-shaped plate (25), two symmetrically arranged positioning grooves (24) are provided inside the second semi-arc-shaped plate (25), and two symmetrically arranged clamping grooves (30) are provided on a side of the second semi-arc-shaped plate (25) close to the first semi-arc-shaped plate (22).

7. The liquid helium and liquid hydrogen valve according to claim 5, characterized in that: A vertical groove (28) is provided at the top of the first semi-arc plate (22), a horizontal groove (33) is provided at one side of the first semi-arc plate (22), a clamping plate (31) is slidably passed through the interior of the horizontal groove (33), the clamping plate (31) is engaged with the clamping groove (30), an oblique groove (32) is provided at the top of the clamping plate (31), a spring (34) is fixedly connected between one end of the clamping plate (31) and an inner wall of one side of the horizontal groove (33), a push rod (29) is fixedly connected to the top of the first semi-arc plate (22), and the push rod (29) is used in conjunction with the corresponding vertical groove (28) and oblique groove (32).

8. The liquid helium and liquid hydrogen valve according to claim 1, characterized in that: It also includes two installation tubes (7), the two installation tubes (7) are symmetrically arranged at the two ends of the lower valve body (19), one side of the inner wall of the installation tube (7) is fixedly connected to an annular block (14), one side of the annular block (14) is fixedly connected to four symmetrical positioning rods (13), the positioning rods (13) are engaged with the positioning grooves (24), one side of the installation tube (7) is fixedly connected to a threaded rod (10), and the outer walls of the two threaded rods (10) are threadedly sleeved with the same threaded sleeve (8).

9. A liquid helium and liquid hydrogen valve according to claim 8, characterized in that: An outer sleeve (11) and an inner slide bar (12) are respectively fixedly connected to the sides of the two installation sleeves (7) that are close to each other, and the inner slide bar (12) slides through the interior of the outer sleeve (11).

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