CN118128957A - Low-temperature ball valve combined sealing device - Google Patents

Abstract

The invention discloses a low-temperature ball valve and valve combined sealing device, and relates to the technical field of valves. This kind of low temperature ball valve combined seal device sets up packing seal assembly and lip sealing washer between valve rod and valve body, can play the effect of combined seal, sealed effect is better, when the lip sealing washer takes place to damage and leak, because packing seal assembly's secondary protection, inside medium can not leak away, the medium of leaking gets into in the fixed pipe, meanwhile, can in time report to the police and instruct, be convenient for operating personnel in time discover and overhaul, and safe and reliable more, and when overhauling and changing, can be with the medium suction in the fixed pipe in the gas receiver temporarily in, wait to overhaul and change after accomplishing, get into the import again through the muffler, avoid leaking and extravagant of medium, environmental protection and health more.

Description

Low-temperature ball valve combined sealing device

Technical Field

The invention relates to the technical field of valves, in particular to a low-temperature ball valve and valve combined sealing device.

Background

The valve is mainly characterized in that the valve is made of low-temperature resistant materials, such as stainless steel, copper and the like, so as to ensure that embrittlement or fracture cannot occur in the low-temperature environment, and the valve rod and the valve body are sealed mainly by low-temperature fillers.

However, when the conventional low-temperature ball valve combined sealing device is used, the sealing effect is poor only through a packing sealing mode, and meanwhile, when leakage occurs at the packing, the leakage is not easy to occur in time, and medium can escape, so that the device is not safe and reliable enough, and the medium is wasted.

Disclosure of Invention

The invention aims to provide a low-temperature ball valve and valve combined sealing device, which solves the problems in the background technology.

In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a low temperature ball valve combination sealing device, includes valve body, import, export, valve rod, case and the packing seal assembly of setting on low temperature ball valve body, first ring channel has been seted up to the lateral wall of valve rod, and the second ring channel has been seted up to the inside wall of valve body, be provided with the lip sealing washer between first ring channel and the second ring channel, and the third ring channel has been seted up to the inside wall of valve body, the fixed pipe that inserts of lateral wall of valve body, and the one end and the inside intercommunication of third ring channel of fixed pipe, the fixed cover of lateral wall of fixed pipe is equipped with the protective housing, and the other end of fixed pipe has inserted the slide bar, the other end of slide bar runs through the tip and fixedly connected with movable block of fixed pipe, and the movable block is connected with the inside wall of protective housing through first canceling release mechanical system, the top of protective housing is provided with the detection mechanism that is used for detecting the removal of movable block, the lateral wall of fixed pipe is provided with the guiding mechanism that is used for when the lip sealing washer takes place to leak, and the lateral wall of fixed pipe is provided with the recycling mechanism that is used for carrying out the medium to leak.

Preferably, the first reset mechanism comprises a guide rod fixedly connected to the end part of the fixed pipe, the other end of the guide rod is fixed to the inner side wall of the protective box, the moving block is sleeved on the side wall of the guide rod, and a first spring is sleeved on the side wall of the guide rod.

Preferably, the detection mechanism comprises a visual angle sensor fixedly inserted at the top of the protective box, the inner side wall of the protective box is fixedly connected with a transparent plate, and scale marks are arranged on the transparent plate.

Preferably, the indicating mechanism comprises a strip-shaped opening formed in the top of the protective box, the side wall of the fixed pipe is rotationally connected with a rotating ring, the bottom of the rotating ring is fixedly connected with a first connecting plate, the lower end of the first connecting plate is fixedly connected with an indicating plate, and the rotation of the rotating ring is driven by a driving mechanism.

Preferably, the driving mechanism comprises a spiral groove formed in the side wall of the rotating ring, the inner side wall of the protective box is connected with the moving frame through the second reset mechanism, the side wall of the moving frame is fixedly connected with a fixing pin, the fixing pin slides in the spiral groove, and the moving of the moving frame is pushed by the pushing mechanism.

Preferably, the second reset mechanism comprises two sleeve rods which are fixedly connected to the side walls of the movable frame and are symmetrically arranged, a sleeve is sleeved on the side walls of the sleeve rods, the other ends of the sleeve are fixed to the inner side walls of the protective box, and a second spring is sleeved on the side walls of the sleeve.

Preferably, the pushing mechanism comprises two symmetrically arranged L-shaped blocks fixedly connected to the end part of the fixed pipe, the side walls of the L-shaped blocks are rotationally connected with rotating plates through rotating shafts, one ends of the rotating plates slide on the side walls of the moving blocks, and the other ends of the rotating plates slide on the side walls of the moving frames.

Preferably, the recycling mechanism comprises an air reservoir fixedly connected to the bottom of the protective box, a piston is connected to the air reservoir through a moving mechanism, an exhaust pipe and an air return pipe are fixedly connected to the end portion of the air reservoir, a first one-way valve is arranged in the exhaust pipe, a second one-way valve is arranged in the air return pipe, the other end of the exhaust pipe is fixedly inserted into the side wall of the fixed pipe, and the other end of the air return pipe is fixedly inserted into the side wall of the inlet.

Preferably, the moving mechanism comprises a guide pipe fixedly connected to the side wall of the protective box, a moving rod is inserted in the guide pipe, the other end of the moving rod is fixedly connected with a second connecting plate, the second connecting plate is fixed to the side wall of the piston, the side wall of the protective box is fixedly connected with a threaded pipe, the threaded pipe is internally threaded, a threaded rod is connected to the threaded pipe in a threaded mode, and the other end of the threaded rod penetrates through the side wall of the second connecting plate and is fixedly connected with a shaking wheel.

Preferably, the end part of the rotating ring is fixedly connected with a plurality of bristles arranged in an array, and the bristles slide on the surface of the visual angle sensor.

Compared with the prior art, the invention has the beneficial effects that:

(1) This kind of low temperature ball valve combination sealing device, through setting up indicating mechanism etc., set up packing seal assembly and lip formula sealing washer between valve rod and valve body, can play the effect of combination seal, and, sealed effect is better, and, when the broken leakage of lip formula sealing washer takes place, because the secondary protection of packing seal assembly, inside medium can not leak, simultaneously, the medium of leaking can get into in the third ring channel, and in the fixed pipe of entering, this moment, can promote slide bar and movable block outside and remove, make first spring compressed, at the same time, when the movable block removes, detect its scale mark that corresponds on with the transparent plate through the visual angle sensor, can in time detect and report to the police to the condition of leaking, and, when the movable block removes, can offset with the one end of rotor plate, thereby promote the rotor plate and rotate along the pivot, and make the other end of rotor plate offset with the lateral wall of removing the frame, promote the rotor plate and remove to the direction that is close to the protective housing, simultaneously, the second spring is compressed, and, when removing the frame and remove, can promote the fixed pin and slide in the heliciform inslot, thereby promote the rotor ring and remove 180, the fixed ring is along the fixed ring, the rotation of side of rotation plate is along the fixed, the side of rotation 180, the side of the fixed plate is passed through the fixed plate, the rotation plate is guaranteed, the high-speed side joint line, can be rotated, and the safety and the operator can be guaranteed to rotate, and the safety device is guaranteed to move the condition is convenient to move.

(2) This kind of low temperature ball valve combination sealing device, through setting up recycle mechanism etc, when needs change the lip type sealing washer, close low temperature ball valve body earlier, then, rotate the rocker, the rotation of rocker drives the rotation of threaded rod, thereby drive the piston and remove to the direction of keeping away from the gas receiver, simultaneously, first check valve is opened, the second check valve is closed, at this moment, medium in the fixed pipe is temporarily stored in the gas receiver through the exhaust tube by the suction, wait to overhaul and change after accomplishing, reverse rotation rocker, make the piston slide in the gas receiver, simultaneously, first check valve is closed, the second check valve is opened, at this moment, the medium of temporarily storing in the gas receiver is got into the import again through the muffler after being extruded, avoid leaking and extravagant of medium, environmental protection and health are more.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is a schematic view of a partial cross-sectional structure of the present invention;

FIG. 3 is a schematic view of a partial cross-sectional structure of a gas cylinder, a fixed tube and a protective case according to the present invention;

FIG. 4 is an enlarged schematic view of the structure shown at A in FIG. 1;

FIG. 5 is an enlarged schematic view of the structure shown at B in FIG. 2;

FIG. 6 is an enlarged schematic view of the structure of FIG. 3C;

FIG. 7 is an enlarged schematic view of the structure of FIG. 5 at D;

fig. 8 is an enlarged schematic view of the structure at E in fig. 6.

In the figure: 1. a low temperature ball valve body; 101. a valve body; 102. an inlet; 103. an outlet; 104. a valve stem; 105. a valve core; 106. a packing seal assembly; 201. a guide rod; 202. a first spring; 301. a viewing angle sensor; 302. a transparent plate; 303. a scale mark; 401. a spiral groove; 402. a moving frame; 403. a fixing pin; 501. a loop bar; 502. a sleeve; 503. a second spring; 601. an L-shaped block; 602. a rotating shaft; 603. a rotating plate; 701. a strip-shaped opening; 702. a rotating ring; 703. a first connection plate; 704. an indication board; 801. an air cylinder; 802. an exhaust pipe; 803. an air return pipe; 804. a piston; 901. a second connecting plate; 902. a moving rod; 903. a guide tube; 904. a threaded tube; 905. a threaded rod; 906. shaking wheel; 10. brushing; 11. a first annular groove; 12. a second annular groove; 13. lip type sealing ring; 14. a third annular groove; 15. a fixed tube; 16. a protective box; 17. a slide bar; 18. and (5) moving the block.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1-8, the present invention provides a technical solution: the utility model provides a low temperature ball valve combined sealing device, including setting up valve body 101 on low temperature ball valve body 1, import 102, export 103, valve rod 104, case 105 and packing seal assembly 106, first ring channel 11 has been seted up to the lateral wall of valve rod 104, and second ring channel 12 has been seted up to the inside wall of valve body 101, be provided with lip seal 13 between first ring channel 11 and the second ring channel 12, and the inside wall of valve body 101 has been seted up third ring channel 14, fixed pipe 15 has been inserted to the lateral wall of valve body 101, and the one end of fixed pipe 15 communicates with the inside of third ring channel 14, the fixed cover of lateral wall of fixed pipe 15 is equipped with protective housing 16, and the other end of fixed pipe 15 has been inserted and has been equipped with slide bar 17, the other end of slide bar 17 runs through the tip of fixed pipe 15 and fixedly connected with movable block 18, and movable block 18 is connected with the inside wall of protective housing 16 through first canceling release mechanical system, the top of the protective box 16 is provided with a detection mechanism for detecting the movement of the moving block 18, the side wall of the fixed pipe 15 is provided with an indication mechanism for indicating when the lip type sealing ring 13 leaks, the side wall of the fixed pipe 15 is provided with a recycling mechanism for recycling leaked media, the packing sealing component 106 and the lip type sealing ring 13 are arranged between the valve rod 104 and the valve body 101, the combined sealing effect can be achieved, the sealing effect is better, when the lip type sealing ring 13 is damaged and leaked, the medium in the packing sealing component 106 cannot leak out due to secondary protection, the leaked media enter the fixed pipe 15, and meanwhile, timely alarm and indication can be carried out, so that operators can find and overhaul in time, the protective box is safer and more reliable, and when overhaul and replacement are carried out, the medium in the fixed pipe 15 can be pumped into the air storage barrel 801 for temporary storage, and after maintenance and replacement are completed, the medium can enter the inlet 102 again through the air return pipe 803, so that leakage and waste of the medium are avoided, and the air storage barrel is more environment-friendly and healthy.

The first reset mechanism comprises a guide rod 201 fixedly connected to the end part of the fixed pipe 15, the other end of the guide rod 201 is fixed to the inner side wall of the protective box 16, the moving block 18 is sleeved on the side wall of the guide rod 201, a first spring 202 is sleeved on the side wall of the guide rod 201, and the moving block 18 and the sliding rod 17 move in a guiding and resetting mode.

The detection mechanism comprises a visual angle sensor 301 fixedly inserted into the top of the protective box 16, the inner side wall of the protective box 16 is fixedly connected with a transparent plate 302, and scale marks 303 are arranged on the transparent plate 302, when the movable block 18 moves, the visual angle sensor 301 detects the scale marks 303 corresponding to the transparent plate 302, and leakage conditions can be timely detected and alarmed.

The indicating mechanism comprises a strip-shaped opening 701 formed in the top of the protective box 16, the side wall of the fixed pipe 15 is rotationally connected with a rotating ring 702, the bottom of the rotating ring 702 is fixedly connected with a first connecting plate 703, the lower end of the first connecting plate 703 is fixedly connected with an indicating plate 704, the rotating ring 702 is driven by a driving mechanism, when the moving block 18 moves, the rotating ring 702 is driven by the driving mechanism to rotate 180 degrees along the fixed pipe 15, the rotating ring 702 drives the indicating plate 704 to synchronously rotate through the first connecting plate 703, the indicating plate 704 is rotated upwards to be in a vertical state through the strip-shaped opening 701, and operators can find and overhaul the indicating plate in time conveniently.

The driving mechanism comprises a spiral groove 401 formed in the side wall of the rotating ring 702, the inner side wall of the protective box 16 is connected with a moving frame 402 through a second reset mechanism, the side wall of the moving frame 402 is fixedly connected with a fixing pin 403, the fixing pin 403 slides in the spiral groove 401, the moving of the moving frame 402 is pushed by the pushing mechanism, the moving frame 402 is pushed to move towards the direction close to the protective box 16 by the pushing mechanism, and when the moving frame 402 moves, the fixing pin 403 is driven to slide in the spiral groove 401, so that the rotating ring 702 is pushed to rotate 180 degrees along the fixing tube 15.

The second reset mechanism comprises two symmetrically arranged loop bars 501 fixedly connected to the side wall of the movable frame 402, a sleeve 502 is sleeved on the side wall of the loop bars 501, the other end of the sleeve 502 is fixed to the inner side wall of the protective box 16, and a second spring 503 is sleeved on the side wall of the sleeve 502 to guide and reset the movement of the movable frame 402.

The pushing mechanism comprises two symmetrically arranged L-shaped blocks 601 fixedly connected to the end part of the fixed pipe 15, the side walls of the L-shaped blocks 601 are rotationally connected with rotating plates 603 through rotating shafts 602, one ends of the rotating plates 603 slide on the side walls of the moving blocks 18, the other ends of the rotating plates 603 slide on the side walls of the moving frames 402, when the moving blocks 18 move, one ends of the rotating plates 603 abut against each other, so that the rotating plates 603 are pushed to rotate along the rotating shafts 602, the other ends of the rotating plates 603 abut against the side walls of the moving frames 402, and the moving frames 402 are pushed to move towards the direction close to the protective boxes 16.

The reuse mechanism includes the gas receiver 801 of fixed connection in the protective housing 16 bottom, and be connected with piston 804 through moving mechanism in the gas receiver 801, the tip fixedly connected with exhaust tube 802 and muffler 803 of gas receiver 801, and be provided with first check valve in the exhaust tube 802, the direction of conduction of first check valve is by in the fixed pipe 15 to the gas receiver 801, be provided with the second check valve in the muffler 803, the direction of conduction of second check valve is by the gas receiver 801 to import 102, the fixed lateral wall of establishing at the fixed pipe 15 of inserting of the other end of exhaust tube 802, and the fixed lateral wall of establishing at import 102 of inserting of muffler 803, when needs change lip type sealing washer 13, first will be closed, then drive piston 804 to the direction removal of keeping away from the gas receiver 801 through moving mechanism, simultaneously, the first check valve is opened, the second check valve is closed, medium in the fixed pipe 15 is drawn into the gas receiver 801 through the pipe 802 at this moment, wait to accomplish after the temporary storage, make piston 804 slide in the gas receiver 801 through moving mechanism, simultaneously, the first check valve is closed, the second check valve is opened, the medium is more healthy and is prevented from leaking by the air receiver 803 after the time, the medium is more environmental protection and is wasted in the air receiver 803 is passed through the pressure, and is avoided to be more clean and the medium is replaced.

The moving mechanism comprises a guide tube 903 fixedly connected to the side wall of the protective box 16, a moving rod 902 is inserted into the guide tube 903, the other end of the moving rod 902 is fixedly connected with a second connecting plate 901, the second connecting plate 901 is fixed to the side wall of the piston 804, the side wall of the protective box 16 is fixedly connected with a threaded tube 904, the threaded tube 904 is internally threaded with a threaded rod 905, the other end of the threaded rod 905 penetrates through the side wall of the second connecting plate 901 and is fixedly connected with a shaking wheel 906, the shaking wheel 906 rotates to drive the threaded rod 905 to rotate, and accordingly the piston 804 is driven to slide in the air storage barrel 801.

The end of the rotating ring 702 is fixedly connected with a plurality of bristles 10 arranged in an array, the bristles 10 slide on the surface of the visual angle sensor 301, and when the rotating ring 702 rotates, the bristles 10 are driven to synchronously rotate and slide on the surface of the visual angle sensor 301, so that the lens of the visual angle sensor 301 can be automatically cleaned, and the use effect of the lens is ensured.

Working principle: when the packing sealing device is used, the packing sealing assembly 106 and the lip type sealing ring 13 are arranged between the valve rod 104 and the valve body 101, so that the combined sealing effect is achieved, the sealing effect is better, and when the lip type sealing ring 13 is damaged and leaked, the medium in the packing sealing assembly 106 cannot leak due to secondary protection, meanwhile, the leaked medium can enter the third annular groove 14 and enter the fixed pipe 15, and at the moment, the sliding rod 17 and the moving block 18 are pushed to move outwards, so that the first spring 202 is compressed;

Meanwhile, when the movable block 18 moves, the visual angle sensor 301 detects the corresponding scale mark 303 on the transparent plate 302, so that leakage condition can be detected and alarmed in time, and when the movable block 18 moves, one end of the movable block 603 is propped against one end of the rotating plate 603, so that the rotating plate 603 is pushed to rotate along the rotating shaft 602, the other end of the rotating plate 603 is propped against the side wall of the movable frame 402, the movable frame 402 is pushed to move towards the direction close to the protective box 16, meanwhile, the second spring 503 is compressed, and when the movable frame 402 moves, the fixed pin 403 is driven to slide in the spiral groove 401, so that the rotating ring 702 is pushed to rotate 180 degrees along the fixed pipe 15, the rotating ring 702 drives the indicating plate 704 to synchronously rotate through the first connecting plate 703, the indicating plate 704 is upwards rotated to a vertical state through the strip-shaped opening 701, the indicating plate is convenient for operators to find and overhaul in time, the use effect of the low-temperature ball valve body 1 is guaranteed, medium leakage is avoided, and the valve body 1 is safer and more reliable;

When the rotating ring 702 rotates, the brush hair 10 is driven to synchronously rotate and slide on the surface of the visual angle sensor 301, so that the lens of the visual angle sensor 301 can be automatically cleaned, and the use effect of the lens is ensured;

when detecting that leakage occurs, when the lip type sealing ring 13 needs to be replaced, the low-temperature ball valve body 1 is closed firstly, then the rocker 906 is rotated, the rotation of the rocker 906 drives the threaded rod 905 to rotate, so that the piston 804 is driven to move in a direction away from the air storage barrel 801, meanwhile, the first one-way valve is opened, the second one-way valve is closed, and at the moment, a medium in the fixed pipe 15 is pumped into the air storage barrel 801 through the exhaust pipe 802 for temporary storage;

After maintenance and replacement are completed, the rocker 906 is reversely rotated, so that the piston 804 slides into the air cylinder 801, meanwhile, the first one-way valve is closed, the second one-way valve is opened, at this time, the medium temporarily stored in the air cylinder 801 is extruded and then enters the inlet 102 again through the air return pipe 803, leakage and waste of the medium are avoided, and the air cylinder is more environment-friendly and healthy.

Claims (10)

1. The utility model provides a low temperature ball valve combination sealing device, includes valve body (101), import (102), export (103), valve rod (104), case (105) and packing seal assembly (106) of setting on low temperature ball valve body (1), its characterized in that: the side wall of valve rod (104) has seted up first ring channel (11), and the inside wall of valve body (101) has seted up second ring channel (12), be provided with lip type sealing washer (13) between first ring channel (11) and second ring channel (12), and the inside wall of valve body (101) has seted up third ring channel (14), the fixed pipe (15) of having inserted of lateral wall of valve body (101), and the one end and the inside intercommunication of third ring channel (14) of fixed pipe (15), the fixed cover of lateral wall of fixed pipe (15) is equipped with protective housing (16), and the other end of fixed pipe (15) has inserted slide bar (17), the other end of slide bar (17) runs through the tip and fixedly connected with movable block (18) of fixed pipe (15), and movable block (18) are connected with the inside wall of protective housing (16) through first canceling release mechanical system, the top of housing (16) is provided with the detection mechanism that is used for detecting the removal of movable block (18), the lateral wall of fixed pipe (15) is provided with and is used for carrying out the instruction mechanism that leaks again to utilize protective housing (13) to take place when the seal ring (14) to indicate the side wall that the side wall is used for leaking medium.

2. The cryogenic ball valve assembly seal of claim 1 wherein: the first reset mechanism comprises a guide rod (201) fixedly connected to the end part of the fixed pipe (15), the other end of the guide rod (201) is fixed to the inner side wall of the protective box (16), the moving block (18) is sleeved on the side wall of the guide rod (201), and a first spring (202) is sleeved on the side wall of the guide rod (201).

3. The cryogenic ball valve assembly seal of claim 1 wherein: the detection mechanism comprises a visual angle sensor (301) fixedly inserted into the top of the protective box (16), a transparent plate (302) is fixedly connected to the inner side wall of the protective box (16), and a scale mark (303) is arranged on the transparent plate (302).

4. A cryogenic ball valve assembly seal as defined in claim 3 wherein: the indicating mechanism comprises a strip-shaped opening (701) formed in the top of the protective box (16), the side wall of the fixed pipe (15) is rotationally connected with a rotating ring (702), the bottom of the rotating ring (702) is fixedly connected with a first connecting plate (703), the lower end of the first connecting plate (703) is fixedly connected with an indicating plate (704), and the rotation of the rotating ring (702) is driven by a driving mechanism.

5. The cryogenic ball valve assembly seal of claim 4 wherein: the driving mechanism comprises a spiral groove (401) formed in the side wall of the rotating ring (702), the inner side wall of the protective box (16) is connected with a movable frame (402) through a second reset mechanism, the side wall of the movable frame (402) is fixedly connected with a fixing pin (403), the fixing pin (403) slides in the spiral groove (401), and the movable frame (402) is moved to be pushed by a pushing mechanism.

6. The cryogenic ball valve assembly seal of claim 5 wherein: the second reset mechanism comprises two sleeve rods (501) which are fixedly connected to the side walls of the movable frame (402) and symmetrically arranged, a sleeve pipe (502) is sleeved on the side walls of the sleeve rods (501), the other end of the sleeve pipe (502) is fixed to the inner side wall of the protective box (16), and a second spring (503) is sleeved on the side walls of the sleeve pipe (502).

7. The cryogenic ball valve assembly seal of claim 5 wherein: the pushing mechanism comprises two symmetrically arranged L-shaped blocks (601) fixedly connected to the end part of the fixed pipe (15), the side walls of the L-shaped blocks (601) are rotatably connected with rotating plates (603) through rotating shafts (602), one ends of the rotating plates (603) slide on the side walls of the moving blocks (18), and the other ends of the rotating plates (603) slide on the side walls of the moving frames (402).

8. The cryogenic ball valve assembly seal of claim 1 wherein: the recycling mechanism comprises an air reservoir (801) fixedly connected to the bottom of a protective box (16), a piston (804) is connected in the air reservoir (801) through a moving mechanism, an air extraction pipe (802) and an air return pipe (803) are fixedly connected to the end part of the air reservoir (801), a first one-way valve is arranged in the air extraction pipe (802), a second one-way valve is arranged in the air return pipe (803), the other end of the air extraction pipe (802) is fixedly inserted into the side wall of the fixed pipe (15), and the other end of the air return pipe (803) is fixedly inserted into the side wall of the inlet (102).

9. The cryogenic ball valve assembly seal of claim 8 wherein: the moving mechanism comprises a guide pipe (903) fixedly connected to the side wall of the protective box (16), a moving rod (902) is inserted into the guide pipe (903), the other end of the moving rod (902) is fixedly connected with a second connecting plate (901), the second connecting plate (901) is fixed to the side wall of the piston (804), a threaded pipe (904) is fixedly connected to the side wall of the protective box (16), the threaded pipe (904) is internally threaded, a threaded rod (905) is connected to the threaded pipe (904), and the other end of the threaded rod (905) penetrates through the side wall of the second connecting plate (901) and is fixedly connected with a rocking wheel (906).

10. The cryogenic ball valve assembly seal of claim 5 wherein: the end part of the rotating ring (702) is fixedly connected with a plurality of bristles (10) arranged in an array, and the bristles (10) slide on the surface of the visual angle sensor (301).