CN111022654B

CN111022654B - Low-temperature valve

Info

Publication number: CN111022654B
Application number: CN201911157566.4A
Authority: CN
Inventors: 崔广龙; 孙方军
Original assignee: Jiangsu Cryote Cryogenic Technology Co ltd
Current assignee: Jiangsu Cryote Cryogenic Technology Co ltd
Priority date: 2019-11-22
Filing date: 2019-11-22
Publication date: 2021-11-26
Anticipated expiration: 2039-11-22
Also published as: CN111022654A

Abstract

The invention relates to the technical field of valves, in particular to a low-temperature valve. The device comprises an actuating mechanism, a supporting plate, a valve cover, an upper connecting rod, a lower connecting rod, an upper seat of an upper corrugated pipe, an upper seat of a lower corrugated pipe, a connecting device, an upper corrugated pipe, a lower corrugated pipe, an outer pipe, a locking nut and a valve core; the valve cover and the upper seat of the upper corrugated pipe are connected in the cavity of the outer pipe, and the valve cover and the upper seat of the upper corrugated pipe and the outer pipe are locked and reinforced through the locking nut; the upper corrugated pipe is positioned below the upper seat of the upper corrugated pipe and is penetrated by the upper connecting rod; the lower corrugated pipe is inversely arranged on the upper seat of the lower corrugated pipe; one end of the lower connecting rod is connected with the upper connecting rod through the connecting device, and the other end of the lower connecting rod is connected with the valve core. The invention aims to provide a low-temperature valve with strong practicability, which solves the problems that thermoacoustic oscillation cannot be inhibited and heat leakage is overlarge in the conventional low-temperature valve, and simultaneously ensures that the low-temperature valve is simple to disassemble and convenient to maintain.

Description

Low-temperature valve

Technical Field

The invention relates to the technical field of valves, in particular to a low-temperature valve.

Background

The low-temperature valve is used for a valve working in a low-temperature environment, and the thermoacoustic oscillation refers to a time-averaged energy effect generated between acoustic oscillation of compressible fluid and a solid medium due to thermal interaction. The traditional low-temperature valve can not inhibit thermoacoustic oscillation, so that larger pressure is generated in the valve body, and the pressure of the inner cavity of the valve body is equal to the pressure of a medium. The outer wall of the valve body is thick due to pressure, so that the heat leakage is overlarge and the reliability is poor.

In the prior art, the low-temperature valve is often designed to be integrally formed, so that the corrugated pipe cannot be replaced after being damaged in the use process of the low-temperature valve, and unnecessary loss and waste are caused.

In view of the above problems, the designer is based on the practical experience and professional knowledge that the engineering of such products is applied for many years, and is matched with the application of the theory to actively carry out research and innovation, so as to design a low-temperature valve, and overcome the problems that the traditional low-temperature valve is poor in practicability and the like.

Disclosure of Invention

The invention aims to provide a low-temperature valve with strong practicability, which solves the problems that thermoacoustic oscillation cannot be inhibited and heat leakage is overlarge in the conventional low-temperature valve, and simultaneously ensures that the low-temperature valve is simple to disassemble and convenient to maintain.

In order to achieve the purpose, the invention adopts the technical scheme that:

a low-temperature valve comprises an actuating mechanism, a supporting plate, a valve cover, an upper connecting rod, a lower connecting rod, an upper corrugated pipe seat, a lower corrugated pipe seat, a connecting device, an upper corrugated pipe, a lower corrugated pipe, an outer pipe, a locking nut and a valve core; the output end of the actuating mechanism is connected with the upper connecting rod so as to drive the upper connecting rod to reciprocate along the length direction of the low-temperature valve; the supporting plate is fixed on the top of the valve cover and used for supporting the actuating mechanism; the valve cover and the upper seat of the upper corrugated pipe are connected in the cavity of the outer pipe, and the valve cover and the upper seat of the upper corrugated pipe and the outer pipe are locked and reinforced through the locking nut; the upper corrugated pipe is positioned below the upper seat of the upper corrugated pipe and is penetrated by the upper connecting rod; the lower corrugated pipe is inverted on the upper seat of the lower corrugated pipe and is penetrated by the lower connecting rod; one end of the lower connecting rod is connected with the upper connecting rod through the connecting device, and the other end of the lower connecting rod is connected with the valve core.

Further, the connecting device comprises a lock cover, a bearing ball and a gasket; the contact surfaces of the upper connecting rod and the lower connecting rod are respectively provided with a hemispherical groove for placing the bearing ball, so that the contact surfaces of the upper connecting rod and the lower connecting rod are uniformly stressed; a wrapping shell is arranged at the end part of the joint of the lower connecting rod and the upper connecting rod, and the wrapping shell and the lower connecting rod are of an integral structure; the gasket is arranged between the top of the wrapping shell and the upper connecting rod in a cushioning mode, and is used for limiting and facilitating mounting and dismounting; the locking cover is internally provided with threads matched with the outer part of the wrapping shell and used for fixedly connecting the upper connecting rod with the lower connecting rod.

Furthermore, a plurality of limiting nuts are arranged on the part, located inside the valve cover, of the upper connecting rod; the limiting nut is used for limiting the movement range of the upper connecting rod when the actuating mechanism drives the upper connecting rod to move.

Furthermore, the upper seat of the upper corrugated pipe is provided with a vacuum hole for placing a vacuum plug; the vacuum plug is used for guaranteeing the vacuum of a cavity formed by the outer wall of the upper corrugated pipe, the outer wall of the lower corrugated pipe and the inner wall of the outer pipe.

Furthermore, an upper guide ring is arranged on the upper seat of the upper corrugated pipe; the inner hole of the upper guide ring is used for the penetration of the upper connecting rod, and is used for ensuring the coaxiality with the outer pipe.

Further, a first sealing ring is arranged between the outer wall of the upper seat of the upper corrugated pipe and the inner wall of the outer pipe; the first sealing ring is used for ensuring the sealing between the outer wall of the upper seat of the upper corrugated pipe and the inner wall of the outer pipe.

Further, a lower guide ring is arranged on the upper seat of the lower corrugated pipe; the inner hole of the lower guide ring is used for the lower connecting rod to penetrate through and is used for guaranteeing the coaxiality with the outer pipe.

Further, a bolt is arranged at the joint of the upper seat of the lower corrugated pipe and the bottom of the outer pipe; the bolt is used for fixing the upper seat of the lower corrugated pipe at the bottom of the outer pipe.

Further, a second sealing ring is arranged at the joint of the upper seat of the lower corrugated pipe and the bottom of the outer pipe; and the second sealing ring is used for ensuring the sealing of the joint of the upper seat of the lower corrugated pipe and the bottom of the outer pipe.

Further, the device also comprises a sealing device; the sealing device comprises a sealing plate, a sealing ring and a screw; the sealing plate is fixedly connected with the upper seat of the upper corrugated pipe through the screw; the sealing ring is positioned between the sealing plate and the lower surface of the upper seat of the upper corrugated pipe.

Through the technical scheme of the invention, the following technical effects can be realized:

the cavity between the connecting rod and the outer pipe is vacuumized by inverting the lower corrugated pipe, so that thermoacoustic oscillation is effectively inhibited; meanwhile, the connecting structure is arranged at the joint of the upper connecting rod and the lower connecting rod, so that the low-temperature valve is convenient to disassemble, the heat conduction and the heat leakage of the connecting rods are greatly reduced, the processing difficulty is reduced, and the practicability of the low-temperature valve is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of a cryogenic valve according to the present invention;

FIG. 2 is a schematic view of the structure of the connecting device of the present invention;

FIG. 3 is a schematic structural view of an upper seat of an upper bellows according to the present invention (sealing means not shown);

FIG. 4 is a schematic structural view of the upper seat of the lower bellows in the present invention;

FIG. 5 is a schematic view of the sealing device of the present invention;

description of the drawings: the device comprises an actuating mechanism 1, a supporting plate 2, a valve cover 3, an upper connecting rod 4, a lower connecting rod 5, an upper bellows upper seat 6, a lower bellows upper seat 7, a connecting device 8, an upper bellows 9, a lower bellows 10, an outer tube 11, a lock nut 12, a valve core 13, a sealing device 14, a limiting nut 41, a wrapping shell 51, a vacuum plug 61, an upper guide ring 62, a first sealing ring 63, a lower guide ring 71, a bolt 72, a second sealing ring 73, a lock cover 81, a force bearing ball 82, a gasket 83, a sealing plate 141, a sealing ring 142 and a screw 143.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

A low-temperature valve is shown in figure 1 and comprises an actuating mechanism 1, a supporting plate 2, a valve cover 3, an upper connecting rod 4, a lower connecting rod 5, an upper corrugated pipe upper seat 6, a lower corrugated pipe upper seat 7, a connecting device 8, an upper corrugated pipe 9, a lower corrugated pipe 10, an outer pipe 11, a lock nut 12 and a valve core 13; the output end of the actuating mechanism 1 is connected with the upper connecting rod 4 so as to drive the upper connecting rod 4 to reciprocate along the length direction of the low-temperature valve; the supporting plate 2 is fixed on the top of the valve cover 3 and used for supporting the actuating mechanism 1; the valve cover 3 and the upper corrugated pipe seat 6 are connected in the cavity of the outer pipe 11, and the locking nut 12 is used for locking and reinforcing the valve cover 3, the upper corrugated pipe seat 6 and the outer pipe 11; the upper corrugated pipe 9 is positioned below the upper corrugated pipe upper seat 6 and is penetrated by the upper connecting rod 4; the lower corrugated pipe 10 is inverted on the lower corrugated pipe upper seat 7 and is penetrated by the lower connecting rod 5; one end of the lower connecting rod 5 is connected with the upper connecting rod 4 through the connecting device 8, and the other end of the lower connecting rod is connected with the valve core 13.

Specifically, the output end of the actuating mechanism 1 is connected with the upper connecting rod 4 and used for driving the upper connecting rod 4 to reciprocate along the length direction of the low-temperature valve; the lower connecting rod 5 is connected with the upper connecting rod 4 through a connecting device 8, and the tail end of the lower connecting rod 5 is connected with a valve core 13; the lower bellows 10 changes its own pressure condition by inversion, the outer part of the lower bellows 10 is in contact with the closed space due to the special structure, the external pressure is stable, and the internal pressure of the inner cavity of the lower bellows 10 is greater than the external pressure due to the influence of the cryogenic fluid. Compared with the corrugated pipe which is subjected to larger external pressure in the existing low-temperature valve, the lower corrugated pipe 10 has better service performance and greatly prolongs the service life.

As a preference of the above embodiment, as shown in fig. 2, the connecting device 8 includes a lock cover 81, a bearing ball 82 and a gasket 83; hemispherical grooves are formed in the contact surfaces of the upper connecting rod 4 and the lower connecting rod 5 respectively and used for placing the bearing balls 82, so that the contact surfaces of the upper connecting rod 4 and the lower connecting rod 5 are stressed uniformly; a wrapping shell 51 is arranged at the end part of the joint of the lower connecting rod 5 and the upper connecting rod 4, and the wrapping shell 51 and the lower connecting rod 5 are of an integral structure; the gasket 83 is padded between the top of the wrapping shell 51 and the upper connecting rod 4 and used for limiting and facilitating mounting and dismounting; the locking cover 81 is internally provided with threads matched with the outside of the wrapping shell 51 and used for fixedly connecting the upper connecting rod 4 and the lower connecting rod 5.

Specifically, hemispherical grooves are respectively formed in the contact surfaces of the upper connecting rod 4 and the lower connecting rod 5 and used for placing the bearing balls 82. If two contact surfaces of the upper connecting rod 4 and the lower connecting rod 5 are in direct contact, the rotation self-adjustment is not facilitated, and the stress is not uniform; after the bearing ball 82 is placed, the stress is more balanced, and the stability is improved. Meanwhile, a gasket 83 is arranged between the top of the wrapping shell 51 and the upper connecting rod 4 in a cushioning mode, so that the top of the wrapping shell 51 is matched with the upper connecting rod 4 more closely. And finally, the whole connecting device is locked by matching the locking cover 81 with the thread outside the wrapping shell 51, so that the upper connecting rod 4 and the lower connecting rod 5 are connected more firmly. During the dismantlement, only need unscrew locking closure 81, take out the gasket 83 between parcel shell 51 top and the last connecting rod 4, alright accomplish the dismantlement that connecting rod 4 and lower connecting rod 5 are connected, improve the simplicity of dismantling. In actual processing, if a rod is used for replacing two disconnected connecting rods, the processing difficulty is very high on the premise of ensuring the straightness and the coaxiality, and the detachable structure of the disconnection can greatly reduce the processing difficulty.

As a preferable example of the above embodiment, as shown in fig. 3, a plurality of limit nuts 41 are disposed on the portion of the upper connecting rod 4 located inside the valve cover 3; the limiting nut 41 is used for limiting the movement range of the upper connecting rod 4 when the actuating mechanism 1 drives the upper connecting rod 4 to move.

Specifically, the limiting nuts 41 are arranged on the upper connecting rod 4, and the limiting nuts 41 limit the movement of the upper connecting rod 4 between the valve cover 3 and the upper bellows upper seat 6, so that the movement range of the upper connecting rod 4 is limited necessarily, and the bellows is prevented from being damaged due to the over-limit movement of the low-temperature valve.

As a preferred example of the above embodiment, as shown in fig. 3, the upper bellows upper seat 6 is provided with a vacuum hole for placing a vacuum plug 61; the vacuum plug 61 is used for guaranteeing vacuum of a chamber formed by the outer wall of the upper corrugated pipe 9, the outer wall of the lower corrugated pipe 10 and the inner wall of the outer pipe 11.

Specifically, the method for arranging the vacuum plug 61 on the upper seat 6 of the upper corrugated pipe by opening the vacuum hole can vacuumize the cavity between the upper connecting rod 4, the lower connecting rod 5 and the outer pipe 11 before use, thereby greatly reducing the heat leakage of gas convection and gas heat conduction.

As a preferable example of the above embodiment, as shown in fig. 3, the upper bellows upper seat 6 is provided with an upper guide ring 62; the inner hole of the upper guide ring 62 is used for the upper connecting rod 4 to penetrate through, and is used for ensuring the coaxiality with the outer pipe.

As a preferable example of the above embodiment, as shown in fig. 3, a first sealing ring 63 is provided between the outer wall of the upper bellows upper seat 6 and the inner wall of the outer tube 11; the first sealing ring 63 is used for ensuring the sealing between the outer wall of the upper bellows upper seat 6 and the inner wall of the outer tube 11.

As a preferable example of the above embodiment, as shown in fig. 4, the lower bellows upper seat 7 is provided with a lower guide ring 71; the inner hole of the lower guide ring 71 is used for the lower connecting rod 5 to penetrate through, and is used for guaranteeing the coaxiality with the outer pipe.

As a preferable example of the above embodiment, as shown in fig. 4, a bolt 72 is provided at a connection position of the lower bellows upper seat 7 and the bottom of the outer tube 11; the bolt 72 is used for fixing the lower bellows upper seat 7 at the bottom of the outer tube 11.

As a preferable example of the above embodiment, as shown in fig. 4, a second sealing ring 73 is disposed at a connection position of the lower bellows upper seat 7 and the bottom of the outer tube 11; the second sealing ring 73 is used for ensuring the sealing of the joint between the lower bellows upper seat 7 and the bottom of the outer tube 11.

As a preference of the above embodiment, as shown in fig. 5, a sealing device 14; the sealing device 14 comprises a sealing plate 141, a sealing ring 142 and a screw 143; the sealing plate 141 is fixedly connected with the upper bellows upper seat 6 through the screw 143; the sealing ring 142 is located between the sealing plate 141 and the lower surface of the upper bellows upper seat 6.

Specifically, the sealing device 14 enhances the sealing performance and facilitates the mounting and dismounting of the upper bellows upper seat 6 and the upper connecting rod 4.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A low-temperature valve is characterized by comprising an actuating mechanism (1), a supporting plate (2), a valve cover (3), an upper connecting rod (4), a lower connecting rod (5), an upper corrugated pipe seat (6), a lower corrugated pipe seat (7), a connecting device (8), an upper corrugated pipe (9), a lower corrugated pipe (10), an outer pipe (11), a locking nut (12) and a valve core (13); the output end of the actuating mechanism (1) is connected with the upper connecting rod (4) so as to drive the upper connecting rod (4) to reciprocate along the length direction of the low-temperature valve; the supporting plate (2) is fixed on the top of the valve cover (3) and is used for supporting the actuating mechanism (1); the valve cover (3) and the upper corrugated pipe seat (6) are connected in the cavity of the outer pipe (11), and the valve cover (3), the upper corrugated pipe seat (6) and the outer pipe (11) are locked and reinforced through the locking nut (12); the upper corrugated pipe (9) is positioned below the upper corrugated pipe seat (6) and is penetrated by the upper connecting rod (4); the lower corrugated pipe (10) is inverted on the lower corrugated pipe upper seat (7) and is penetrated by the lower connecting rod (5), and low-temperature liquid flows into the inner cavity of the lower corrugated pipe (10) from the penetrating position; one end of the lower connecting rod (5) is connected with the upper connecting rod (4) through the connecting device (8), and the other end of the lower connecting rod is connected with the valve core (13).

2. A cryogenic valve according to claim 1, wherein the connection means (8) comprises a locking cap (81), a bearing ball (82) and a washer (83); hemispherical grooves are formed in the contact surfaces of the upper connecting rod (4) and the lower connecting rod (5) respectively and used for placing the bearing balls (82), so that the contact surfaces of the upper connecting rod (4) and the lower connecting rod (5) are stressed uniformly; a wrapping shell (51) is arranged at the end part of the joint of the lower connecting rod (5) and the upper connecting rod (4), and the wrapping shell (51) and the lower connecting rod (5) are of an integral structure; the gasket (83) is padded between the top of the wrapping shell (51) and the upper connecting rod (4) and used for limiting and facilitating mounting and dismounting; the locking cover (81) is internally provided with threads matched with the outside of the wrapping shell (51) and used for fixedly connecting the upper connecting rod (4) with the lower connecting rod (5).

3. A cryogenic valve according to claim 1, wherein the part of the upper connecting rod (4) inside the valve cover (3) is provided with a plurality of limit nuts (41); the limiting nut (41) is used for limiting the movement range of the upper connecting rod (4) when the actuating mechanism (1) drives the upper connecting rod (4) to move.

4. A cryogenic valve according to claim 1, wherein the upper bellows upper seat (6) is provided with vacuum holes for placing vacuum plugs (61); the vacuum plug (61) is used for guaranteeing the vacuum of a chamber formed by the outer wall of the upper corrugated pipe (9), the outer wall of the lower corrugated pipe (10) and the inner wall of the outer pipe (11).

5. A cryogenic valve according to claim 1, wherein the upper bellows upper seat (6) is provided with an upper guide ring (62); the inner hole of the upper guide ring (62) is used for the upper connecting rod (4) to penetrate through, and is used for guaranteeing the coaxiality with the outer pipe.

6. A cryogenic valve according to claim 1, wherein a first sealing ring (63) is arranged between the outer wall of the upper bellows upper seat (6) and the inner wall of the outer tube (11); the first sealing ring (63) is used for ensuring the sealing between the outer wall of the upper corrugated pipe seat (6) and the inner wall of the outer pipe (11).

7. A cryogenic valve according to claim 1, wherein the lower bellows upper seat (7) is provided with a lower guide ring (71); the inner hole of the lower guide ring (71) is used for the lower connecting rod (5) to penetrate through, and is used for guaranteeing the coaxiality with the outer pipe.

8. A cryogenic valve according to claim 1, wherein a bolt (72) is arranged at the joint of the lower bellows upper seat (7) and the bottom of the outer pipe (11); the bolt (72) is used for fixing the lower corrugated pipe upper seat (7) at the bottom of the outer pipe (11).

9. A cryogenic valve according to claim 1, wherein a second sealing ring (73) is arranged at the joint of the lower bellows upper seat (7) and the bottom of the outer pipe (11); the second sealing ring (73) is used for ensuring the sealing of the joint of the upper seat (7) of the lower corrugated pipe and the bottom of the outer pipe (11).

10. A cryogenic valve according to claim 1, further comprising a sealing means (14); the sealing device (14) comprises a sealing plate (141), a sealing ring (142) and a screw (143); the sealing plate (141) is fixedly connected with the upper bellows upper seat (6) through the screw (143); the sealing ring (142) is positioned between the sealing plate (141) and the lower surface of the upper bellows upper seat (6).