CN219198322U

CN219198322U - Vacuum air extraction valve for superconducting magnet

Info

Publication number: CN219198322U
Application number: CN202223390603.6U
Authority: CN
Inventors: 王苏聪; 梁平; 李璟; 白旭东; 郑玲玲
Original assignee: Ningbo Gaosi Superconducting Technology Co ltd
Current assignee: Ningbo Gaosi Superconducting Technology Co ltd
Priority date: 2022-06-24
Filing date: 2022-12-15
Publication date: 2023-06-16
Anticipated expiration: 2032-12-15

Abstract

The application relates to a superconducting magnet vacuum air extraction valve, which belongs to the technical field of valves and comprises a valve body, a piston assembly and a sealing assembly, wherein the piston assembly comprises a sealing piston and a piston rod; the valve body is provided with an air inlet channel, an air outlet channel communicated with the air inlet channel and a penetrating hole for the piston rod to penetrate through; the sealing piston is slidably arranged in the air inlet channel, one end of the piston rod is connected with the sealing piston, and the other end of the piston rod penetrates through the penetrating hole and protrudes out of the penetrating hole; the sealing assembly comprises a sealing ring and a pressing piece, a sealing groove for the sealing ring to be installed and communicated with the penetrating hole is formed in the hole opening of the penetrating hole, the pressing piece is installed at the notch of the sealing groove, one side of the sealing ring is abutted to the bottom of the sealing groove, and the other side of the sealing ring is abutted to the pressing piece. This application has the effect that improves the leakproofness of valve body and valve rod junction.

Description

Vacuum air extraction valve for superconducting magnet

Technical Field

The application relates to the technical field of valves, in particular to a vacuum pumping valve for a superconducting magnet.

Background

The superconducting magnet needs to be vacuumized through a vacuumizing device to create a vacuum environment for the inside of the superconducting magnet. The vacuumizing device comprises a valve body, a valve rod and a valve core, wherein the valve body comprises a base body valve, a quick-release connector which is arranged on the base body valve and connected with a vacuum pump set, and a flange which is arranged on the base body valve and connected with a magnet vacuum chamber, and when the vacuum pump set operates, gas in the magnet sequentially passes through the flange, the base body valve and the quick-release connector. The valve rod is connected with the valve core, the valve core is positioned in the matrix valve, a penetrating hole for the valve rod to penetrate is formed in the matrix valve, one end, far away from the valve core, of the valve rod penetrates through the penetrating hole to protrude out of the matrix valve, the valve core and the matrix valve are moved by pulling the valve rod, and then the matrix valve is communicated or separated from the quick-release connector.

The application number CN202020713311.3 discloses a vacuum shell of a liquid helium-free magnet, and the utility model discloses a vacuum valve, wherein a valve rod is moved to enable a base valve to be communicated with a quick-release connector, so that the interior of the magnet is vacuumized; when the vacuum degree in the magnet reaches the standard, the valve rod is moved to separate the matrix valve from the quick-release connector by the valve core. In order to improve the tightness between the valve rod and the penetrating hole when the valve rod moves, a sealing ring groove is formed in the wall of the penetrating hole, and a sealing ring is arranged in the sealing ring groove.

In view of the above related art, the present inventors have provided another solution for improving the sealing property between a valve stem and a penetration hole when the valve stem is moved.

Disclosure of Invention

In order to improve the tightness of the joint of the valve body and the valve rod, the application provides a superconducting magnet vacuum pumping valve.

The application provides a superconducting magnet vacuum pumping valve adopts following technical scheme:

the superconducting magnet vacuum pumping valve comprises a valve body, a piston assembly and a sealing assembly, wherein the piston assembly comprises a sealing piston and a piston rod;

the valve body is provided with an air inlet channel, an air outlet channel communicated with the air inlet channel and a penetrating hole for the piston rod to penetrate through;

the sealing piston is slidably arranged in the air inlet channel, one end of the piston rod is connected with the sealing piston, and the other end of the piston rod penetrates through the penetrating hole and protrudes out of the penetrating hole;

the sealing assembly comprises a sealing ring and a pressing piece, a sealing groove for the sealing ring to be installed and communicated with the penetrating hole is formed in the hole opening of the penetrating hole, the pressing piece is installed at the notch of the sealing groove, one side of the sealing ring is abutted to the bottom of the sealing groove, and the other side of the sealing ring is abutted to the pressing piece.

Through adopting above-mentioned technical scheme, after the sealing washer is installed in the seal groove, produce bigger deformation through the extrusion of compressing tightly the piece, and then support more tightly in the piston rod, improved the leakproofness of piston rod when wearing to establish downthehole sliding. Meanwhile, the sealing ring is limited in the sealing groove under the action of the pressing piece, so that the risk of synchronous sliding of the sealing ring and the piston rod is reduced, and the tightness of the valve body is further improved.

Meanwhile, as the aperture of the penetrating hole is smaller, compared with the method that the sealing ring groove is formed in the wall of the penetrating hole and then the sealing ring is plugged into the sealing ring groove, the structure is more convenient for installing the sealing ring.

Optionally, the compressing element includes compressing tightly the cover and with the pressure strip that the valve body is connected, compressing tightly the cover and being located one side of pressure strip, the pressure strip is followed compress tightly the projection of cover extending direction is located compress tightly the cover along its self extending direction's projection outward, compress tightly the cover and insert in the seal groove and with the sealing washer butt.

Optionally, the mounting groove that supplies the pressure strip installation has been seted up on the valve body, wear to establish the hole with the seal groove all is located the tank bottom of mounting groove and with the mounting groove intercommunication, the pressure strip deviate from one side of mounting groove tank bottom does not protrude in the mounting groove.

Through adopting above-mentioned technical scheme, compress tightly the cover and insert in the seal groove compress tightly the sealing washer, make the sealing washer take place sufficient deformation and carry out the butt with the valve rod, increased simultaneously and compressed tightly the area of contact between cover and the valve body, and then make and compress tightly the cover and comparatively stable after spacing to the sealing washer. Meanwhile, the compacting plates are arranged in the mounting grooves and do not protrude out of the mounting grooves, so that the risk of interference between the valve body and other parts is reduced, and the space utilization rate is improved.

Optionally, a check ring is sleeved on the piston rod, the check ring is located in the air outlet channel, and the outer diameter of the check ring is larger than the aperture of the through hole.

By adopting the technical scheme, when the sealing piston is pulled to move, the risk that the piston rod is separated from the connection with the sealing piston due to force transition is reduced.

Optionally, an annular groove for embedding the retainer ring is formed in the outer wall of the piston rod.

Through adopting above-mentioned technical scheme, the retaining ring is installed in the annular, has increased the area of contact between retaining ring and the piston rod, has improved the stability of retaining ring installation on the piston rod.

Optionally, the valve body includes base member valve and flange, the inlet channel set up in on the base member valve, the flange inserts in the inlet channel and be connected with superconducting magnet, the cover that slides on the flange is equipped with the go-between, the go-between be close to one side of base member valve with the base member valve is connected, just the base member valve with be provided with the sealing ring between the go-between.

Through adopting above-mentioned technical scheme, the flange is installed on the magnet, when needs to be to the inside evacuation of magnet, locates the base member valve barrel on the flange, removes the go-between and makes base member valve and flange joint be in the same place, and the sealing ring takes place the deformation under the effect of go-between simultaneously, has guaranteed the leakproofness of base member valve and flange joint. When the structure is used for vacuumizing, the matrix valve is convenient to install.

Optionally, a pressing ring is further sleeved on the flange, and a caulking groove for embedding the sealing ring is formed in the pressing ring.

Optionally, a sealing ring groove is formed in the outer wall of the flange, and one side, away from the caulking groove, of the sealing ring protrudes out of the caulking groove and is located in the sealing ring groove.

Through adopting above-mentioned technical scheme, remove the go-between and make the clamp plate to being close to the direction removal of base member valve, with sealing ring extrusion deformation simultaneously, the sealing ring after the deformation is located the sealing ring groove, and then further improves the leakproofness of base member valve and flange junction.

Optionally, the piston assembly further comprises a handle, wherein one side of the piston rod away from the sealing piston is connected with the handle, and the outer diameter of the handle is larger than that of the piston rod.

Optionally, an inserting groove for the piston rod to insert is formed in the handle, a tightening groove is formed in the piston rod, a threaded hole communicated with the inserting groove is formed in the handle, and a threaded end of the bolt penetrates through the threaded hole and is installed in the tightening groove in a threaded mode.

Through adopting above-mentioned technical scheme, the handle passes through the bolt to be installed on the piston rod, and the diameter of handle is greater than the diameter of piston rod, has increased the area of contact between piston rod and the operating personnel, and then it is more convenient when pulling the piston rod and remove.

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

after the sealing ring is arranged in the sealing groove, deformation is generated through extrusion of the pressing piece, and then the sealing ring is abutted to the piston rod, so that the tightness of the piston rod when sliding in the penetrating hole is guaranteed. Meanwhile, the sealing ring is limited in the sealing groove under the action of the pressing piece, so that the risk of synchronous sliding of the sealing ring and the piston rod is reduced;

the retainer ring is arranged, so that when the sealing piston is pulled to move, the risk that the piston rod is separated from the connection with the sealing piston due to force transition is reduced;

the movable connecting ring makes the pressing plate move towards the direction close to the base body valve, and meanwhile the sealing ring is extruded and deformed, and the deformed sealing ring is positioned in the sealing ring groove, so that the tightness of the joint of the base body valve and the flange is further improved.

Drawings

Fig. 1 is a schematic diagram of the overall structure of a vacuum pumping valve for a superconducting magnet in an embodiment of the present application.

Fig. 2 is an overall cross-sectional view of a superconducting magnet vacuum pumping valve in an embodiment of the present application.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is an exploded view of the handle and piston rod in an embodiment of the present application.

Fig. 5 is an enlarged view of the portion B in fig. 2.

Reference numerals illustrate: 1. a valve body; 11. a base valve; 111. an air intake passage; 112. an air outlet channel; 113. penetrating holes; 114. sealing grooves; 115. a mounting groove; 12. a flange; 121. sealing ring grooves; 13. a quick-release connecting pipe; 14. a connecting ring; 15. a compression ring; 151. a caulking groove; 16. a seal ring; 2. a piston assembly; 21. a sealing piston; 22. a piston rod; 221. a retainer ring; 222. a ring groove; 223. a tightening groove; 23. a handle; 231. a plug-in groove; 232. a threaded hole; 3. a seal assembly; 31. a seal ring; 32. a pressing member; 321. a compacting sleeve; 322. and a compacting plate.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-5.

The embodiment of the application discloses a superconducting magnet vacuum pumping valve. Referring to fig. 1 and 2, the superconducting magnet vacuum pumping valve comprises a valve body 1, a piston assembly 2 and a sealing assembly 3. The piston assembly 2 comprises a sealing piston 21 arranged in the valve body 1 and a piston rod 22 with one end protruding out of the other end of the valve body 1 and connected with the sealing piston 21, and the piston rod 22 is pulled outside the valve body 1 and slides in the valve body 1. The sealing assembly 3 is arranged on the valve body 1 to seal the sliding position of the piston rod 22 on the valve body 1.

Referring to fig. 1 and 2, the valve body 1 includes a base valve 11, a flange 12, and a quick-release connecting pipe 13, wherein one end of the base valve 11 is sleeved on the flange 12, and the flange 12 is connected with a magnet; one end of the quick-release connecting pipe 13 is arranged on the side wall of the base body valve 11 and is communicated with the inside of the base body valve 11, and the other end of the quick-release connecting pipe is connected with the vacuum pump assembly. When the vacuum pump assembly is operated, air in the vacuum chamber inside the magnet is pumped out to form a vacuum chamber. The sealing piston 21 is slidably installed inside the base valve 11 for communicating or blocking the connection pipe with the inside of the vacuum chamber.

Referring to fig. 2, an air inlet channel 111 is formed on one side of the base valve 11 near the flange 12, and an air outlet channel 112 communicating with the air inlet channel 111 is formed on the quick release connecting pipe 13. In this embodiment, the quick release connecting pipe 13 is preferably integrally formed with the base valve 11. The sealing piston 21 slides in the air inlet channel 111, and a rubber ring is sleeved on the sealing piston 21, and the outer wall of the rubber ring is abutted against the inner wall of the air inlet channel 111. Wherein, a connecting groove is formed on one side of the sealing piston 21 near the bottom of the air inlet channel 111, and one end of the piston rod 22 is inserted into the connecting groove and is installed in the connecting groove in a threaded manner. The bottom of the air inlet channel 111 is provided with a penetrating hole 113 penetrating through the base valve 11, and one end of the piston rod 22, which is far away from the sealing piston 21, penetrates through the penetrating hole 113 and protrudes out of the base valve 11, so that the piston rod 22 is pulled to move the sealing piston 21 conveniently.

Referring to fig. 2 and 3, a retainer 221 is sleeved on a portion of the piston rod 22 located in the air inlet channel 111, and an annular groove 222 for installing the retainer 221 is formed in the piston rod 22. Taking the retainer ring 221 as an annular plate body, the through hole 113 is exemplified by a round hole. The outer diameter of the collar 221 is larger than the aperture of the through hole 113, thereby reducing the risk that the piston rod 22 will be out of the air inlet channel 111 during movement. When the retainer ring 221 abuts against the bottom of the air inlet channel 111, the air outlet channel 112 is in communication with the vacuum chamber of the magnet.

Referring to fig. 2 and 4, the piston assembly 2 further includes a handle 23 mounted on the piston rod 22, and in this embodiment, the handle 23 is a circular plate body, and the piston rod 22 is a circular rod as an example. The diameter of the handle 23 is larger than the diameter of the piston rod 22. The handle 23 is provided with a plugging groove 231 on one side close to the piston rod 22, and one end of the piston rod 22 away from the sealing piston 21 is inserted into the plugging groove 231. The side wall of the part of the piston rod 22 inserted into the inserting groove 231 is provided with a tightening groove 223, the side wall of the handle 23 is provided with a threaded hole 232 communicated with the inserting groove 231, and the central axis of the threaded hole 232 coincides with the central axis of the tightening groove 223. The threaded end of the bolt is threadedly mounted in the tightening groove 223 through the threaded hole 232.

Referring to fig. 2, the sealing assembly 3 includes a sealing ring 31 and a pressing member 32, and a sealing groove 114 in which the sealing ring 31 is installed is formed at a side of the base valve 11 remote from the flange 12. Taking the sealing groove 114 as a circular groove for example. The central axis of the seal groove 114 coincides with the central axis of the through-hole 113, and the diameter of the seal groove 114 is larger than the diameter of the through-hole 113. The sealing ring 31 is sleeved on the piston rod 22, and the sealing ring 31 is deformed by extrusion of the pressing piece 32 after being installed in the sealing groove 114, so as to be abutted against the outer wall of the piston rod 22.

Referring to fig. 2, the compressing member 32 includes a compressing sleeve 321 and a compressing plate 322, the compressing sleeve 321 and the compressing plate 322 are integrally formed, and the compressing sleeve 321 and the compressing plate 322 are sleeved on the piston rod 22. Taking the pressing plate 322 as a circular plate body, the pressing sleeve 321 is a circular hollow cylinder as an example. The diameter of the compression plate 322 is larger than the outer diameter of the compression sleeve 321, and an end of the piston rod 22 protruding from the base valve 11 passes through the compression plate 322. The pressing sleeve 321 is inserted into the sealing groove 114, and one end of the pressing sleeve 321, which is away from the pressing plate 322, abuts against the sealing ring 31. A mounting groove 115 is provided on a side of the base valve 11 away from the opening of the intake passage 111, and a central axis of the mounting groove 115 coincides with a central axis of the seal groove 114, that is, the seal groove 114 is located at a bottom of the mounting groove 115. The compression plate 322 is mounted in the mounting groove 115 by bolts, and one side of the compression plate 322 facing away from the bottom of the mounting groove 115 does not protrude from the mounting groove 115.

Referring to fig. 2 and 5, a connection ring 14 is sleeved on the flange 12, the connection ring 14 is slidably and rotatably installed on the flange 12, and one side of the connection ring 14, which is close to the base valve 11, is sleeved on the outer wall of the base valve 11 and is in threaded connection with the base valve 11. The flange 12 is also sleeved with a pressing ring 15 in a sliding manner, one side of the pressing ring 15, which is close to the base body valve 11, is provided with an annular caulking groove 151, and one side of the caulking groove 151, which is close to the outer wall of the flange 12, penetrates through the pressing ring 15. The embedded groove 151 is embedded with a sealing ring 16, one side of the sealing ring 16, which is close to the outer wall of the base body valve 11 and the flange 12, protrudes out of the embedded groove 151, and the outer wall of the flange 12 is provided with a sealing ring groove 121. The connecting ring 14 is in threaded connection with the base body valve 11, at this time, the connecting ring 14 drives the compression ring 15 to move towards the direction close to the base body valve 11, when the sealing ring 16 is abutted against the base body valve 11, the connecting ring 14 is continuously rotated, the sealing ring 16 is extruded to deform, and then the deformed part of the sealing ring 16 is located in the sealing ring groove 121.

The implementation principle of the superconducting magnet vacuum pumping valve in the embodiment of the application is as follows: the seal ring 31 is sleeved on the piston rod 22, the seal ring 31 is placed in the seal groove 114, and then the pressing sleeve 321 is inserted into the seal groove 114. The end of the pressing sleeve 321, which is away from the pressing plate 322, abuts against the sealing ring 31, deforms the sealing ring 31 and abuts against the outer wall of the piston rod 22, and finally the pressing plate 322 is fixed in the mounting groove 115 by using a bolt.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. A superconducting magnet vacuum pumping valve is characterized in that: comprises a valve body (1), a piston assembly (2) and a sealing assembly (3), wherein the piston assembly (2) comprises a sealing piston (21) and a piston rod (22);

an air inlet channel (111), an air outlet channel (112) communicated with the air inlet channel (111) and a penetrating hole (113) for the piston rod (22) to penetrate are formed in the valve body (1);

the sealing piston (21) is slidably arranged in the air inlet channel (111), one end of the piston rod (22) is connected with the sealing piston (21), and the other end of the piston rod penetrates through the penetrating hole (113) and protrudes out of the penetrating hole (113);

seal assembly (3) include sealing washer (31) and compress tightly piece (32), set up in the drill way department of wearing to establish hole (113) confession sealing washer (31) installation and with wear to establish seal groove (114) of hole (113) intercommunication, compress tightly piece (32) install in seal groove (114) notch department, just sealing washer (31) one side butt in the tank bottom of seal groove (114), the opposite side butt in compress tightly piece (32).

2. A superconducting magnet vacuum pumping valve as claimed in claim 1, wherein: the packing piece (32) include compress tightly cover (321) and with pinch strip (322) that valve body (1) are connected, compress tightly cover (321) are located one side of pinch strip (322), compress tightly strip (322) are located compress tightly cover (321) extending direction's projection is located compress tightly cover (321) along its self extending direction's projection outward, compress tightly cover (321) insert in seal groove (114) and with sealing washer (31) butt.

3. A superconducting magnet vacuum pumping valve as claimed in claim 2, wherein: the valve body (1) is provided with a mounting groove (115) for mounting the compression plate (322), the penetrating hole (113) and the sealing groove (114) are both positioned at the bottom of the mounting groove (115) and are communicated with the mounting groove (115), and one side of the compression plate (322) deviating from the bottom of the mounting groove (115) is not protruded out of the mounting groove (115).

4. A superconducting magnet vacuum pumping valve as claimed in claim 1, wherein: the piston rod (22) is sleeved with a check ring (221), the check ring (221) is positioned in the air outlet channel (112), and the outer diameter of the check ring (221) is larger than the aperture of the through hole (113).

5. The vacuum pumping valve for a superconducting magnet of claim 4, wherein: an annular groove (222) for embedding the check ring (221) is formed in the outer wall of the piston rod (22).

6. A superconducting magnet vacuum pumping valve as claimed in claim 1, wherein: the valve body (1) comprises a matrix valve (11) and a flange (12), wherein the air inlet channel (111) is formed in the matrix valve (11), the flange (12) is inserted into the air inlet channel (111) and connected with a superconducting magnet, a connecting ring (14) is sleeved on the flange (12) in a sliding manner, one side, close to the matrix valve (11), of the connecting ring (14) is connected with the matrix valve (11), and a sealing ring (16) is arranged between the matrix valve (11) and the connecting ring (14).

7. The vacuum pumping valve of a superconducting magnet of claim 6, wherein: the flange (12) is also sleeved with a pressing ring (15), and the pressing ring (15) is provided with a caulking groove (151) for embedding the sealing ring (16).

8. The vacuum pumping valve of claim 7, wherein: a sealing ring groove (121) is formed in the outer wall of the flange (12), and one side, away from the caulking groove (151), of the sealing ring (16) protrudes out of the caulking groove (151) and is located in the sealing ring groove (121).

9. A superconducting magnet vacuum pumping valve as claimed in claim 1, wherein: the piston assembly (2) further comprises a handle (23), one side of the piston rod (22) away from the sealing piston (21) is connected with the handle (23), and the outer diameter of the handle (23) is larger than that of the piston rod (22).

10. A superconducting magnet vacuum pumping valve as claimed in claim 9, wherein: the handle (23) is provided with an inserting groove (231) for the piston rod (22) to insert, the piston rod (22) is provided with a tightening groove (223), the handle (23) is provided with a threaded hole (232) communicated with the inserting groove (231), and the threaded end of the bolt penetrates through the threaded hole (232) and is installed in the tightening groove (223) in a threaded mode.