CN110686107A - Pressure valve for superconducting magnet container - Google Patents
Pressure valve for superconducting magnet container Download PDFInfo
- Publication number
- CN110686107A CN110686107A CN201910944043.8A CN201910944043A CN110686107A CN 110686107 A CN110686107 A CN 110686107A CN 201910944043 A CN201910944043 A CN 201910944043A CN 110686107 A CN110686107 A CN 110686107A
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- China
- Prior art keywords
- sealing
- superconducting magnet
- valve cavity
- sealing plate
- valve
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
Abstract
The invention provides a pressure valve for a superconducting magnet container, which is assembled on the superconducting magnet container and comprises a valve cavity, a pretightening force adjusting device arranged at the top of the valve cavity, a sealing plate arranged in the valve cavity and a sealing element positioned between the sealing plate and the inner wall of the valve cavity, wherein the pretightening force adjusting device is provided with an elastic element, the other end of the elastic element is fixed on the sealing plate, the bottom wall of the valve cavity is provided with an air inlet, and the side wall of the valve cavity is provided with an air outlet at a position close to the bottom wall; the sealing element comprises a first sealing element and a second sealing element, the first sealing element is used for sealing the pretightening force adjusting device and the elastic element, and the second sealing element is used for sealing the air inlet. According to the invention, the elastic part is isolated from the atmosphere or the environment, so that the opening pressure of the pressure valve is only related to the elastic part and is not influenced by the environment, and the pressure inside the superconducting magnet is controlled to be a constant value.
Description
Technical Field
The invention relates to the technical field of pressure valves, in particular to a pressure valve for a superconducting magnet container.
Background
Superconducting magnets typically operate in the liquid helium temperature region, and are typically cooled by immersion in liquid helium due to the large size of the magnet and the high temperature uniformity required.
During the transportation process of the superconducting magnet, the refrigerator of the superconducting magnet is in a shutdown state under a normal state, heat leakage to the inside of the magnet cannot be carried away by the refrigerator, and the heat leakage inevitably causes volatilization of liquid helium stored in a liquid helium cavity in the superconducting magnet. In the course of land transportation, a one-way valve is usually used, through which the superconducting magnet is vented to the environment. If the superconducting magnet container passes through a high-altitude area, the superconducting magnet container is abnormally exhausted in a large amount due to the change of air pressure; in the air transportation process, due to the fact that the pressure of the cargo aircraft cabin changes or suddenly loses pressure, the helium leakage amount of the superconducting magnet is increased by using the one-way valve in the case. The performance of the one-way valve employed in the conventional art is: the difference between the internal pressure of the superconducting magnet and the ambient pressure is a constant value, that is, the internal pressure of the magnet changes with the ambient pressure. For example, patent CN201210411470.8 describes a superconducting magnet pressure relief valve and a pressure relief system, and it can be known from the disclosure that the valve is only a gauge pressure valve, that is, the valve involved is a balance among the internal pressure of the magnet, the tension of the spring, and the ambient pressure, so that the internal pressure of the superconducting magnet is greatly influenced by the atmospheric or ambient pressure.
Therefore, an absolute pressure valve is required to be designed to ensure that the pressure inside the superconducting magnet does not change along with the change of the environmental pressure, and a constant-pressure exhaust process is realized.
Disclosure of Invention
The invention aims to provide an absolute pressure valve to ensure that the pressure in a superconducting magnet does not change along with the change of the environmental pressure, and realize a constant-pressure exhaust process.
In order to achieve the above object, the present invention provides a pressure valve for a superconducting magnet container, which is assembled on the superconducting magnet container, and comprises a valve cavity, a pretightening force adjusting device disposed at the top of the valve cavity, a sealing plate disposed in the valve cavity, and a sealing member located between the sealing plate and the inner wall of the valve cavity, wherein an elastic member is disposed on the pretightening force adjusting device, the other end of the elastic member is fixed on the sealing plate, an air inlet is disposed on the bottom wall of the valve cavity, and an air outlet is disposed on the side wall of the valve cavity at a position close to the bottom wall; the sealing element comprises a first sealing element and a second sealing element, the first sealing element is used for sealing the pretightening force adjusting device and the elastic element, and the second sealing element is used for sealing the air inlet. By arranging the elastic member to be isolated from the atmosphere or the environment, the elastic member exerts force on the sealing member, so that the opening pressure of the pressure valve is only related to the elastic member and is not influenced by the atmosphere or the surrounding environment, thereby controlling the pressure inside the superconducting magnet to be a constant value.
Furthermore, the air pressure in the superconducting magnet container pushes the second sealing element and the air inlet to release sealing, then the air is discharged through the air outlet, and the first sealing element is still in sealing connection with the pretightening force adjusting device and the elastic element. The second sealing element fails when the gas is exhausted, and the first sealing element still keeps good sealing so as to isolate the influence of atmospheric or environmental pressure, thereby ensuring that the pressure regulation of the pressure valve is only related to the pressure inside the superconducting magnet container, which is borne by the elastic element.
Furthermore, a first fixing part is arranged on the sealing plate or the inner wall of the valve cavity and used for fixing the first sealing element. The first sealing element is fixed with the sealing plate or the inner wall of the valve cavity, so that the flexibility of arrangement of the first sealing element is increased, and the product adaptability is improved.
Furthermore, a second fixing part is arranged on the sealing plate or the inner wall of the valve cavity and used for fixing the second sealing element. The second sealing element is fixed with the sealing plate or the inner wall of the valve cavity, so that the flexibility of the arrangement of the second sealing element is increased, and the product adaptability is improved.
Further, the sealing plate is of an integrated U-shaped structure, the elastic piece is arranged in the U-shaped cavity of the sealing plate, the first sealing piece is located between the side wall of the sealing plate and the side wall of the valve cavity, and the second sealing piece is located between the bottom wall of the sealing plate and the bottom wall of the valve cavity. The U-shaped sealing plate can increase the sealing performance of the first sealing element and the valve cavity to ensure that the elastic element is isolated from the atmosphere or the environment in the pressure control process.
Furthermore, the elastic element is arranged in the flexible rotary element, the sealing plate comprises a first sealing plate positioned between the elastic element and the pretightening force adjusting device and a second sealing plate positioned between the bottom end of the elastic element and the bottom wall of the valve cavity, and a first sealing element is arranged between the first sealing plate and the inner wall of the valve cavity; and a second sealing element is arranged between the second sealing plate and the bottom wall of the valve cavity. The first sealing plate and the first sealing piece ensure that the elastic piece is isolated from the atmosphere or the environment, and the cooperation of the second sealing piece and the second sealing plate enables the pressure in the superconducting magnet container to be kept within a safe range.
Further, the flexible rotary element is any one of a dense air-tight film, a corrugated teflon film and a welded metal corrugated pipe.
Further, the elastic member is any one of a compression spring, a belleville spring, or an elastic bellows.
Further, the valve cavity is made of any one of stainless steel, aluminum alloy, magnesium aluminum alloy, nylon or PEEK.
Further, the air inlet adopts one of KF and CF flanges or one of NPT threaded joint and ferrule joint.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the elastic part is isolated from the atmosphere or the environment, and the elastic part acts on the sealing part, so that the opening pressure of the pressure valve is only related to the elastic part and is not influenced by the atmosphere or the surrounding environment, and the pressure inside the superconducting magnet is controlled to be a constant value.
Drawings
Fig. 1 is a schematic perspective cross-sectional view of a pressure valve for a superconducting magnet vessel according to an embodiment of the present application;
fig. 2 is a schematic perspective cross-sectional view of a pressure valve for a superconducting magnet vessel according to another embodiment of the present application.
Reference numerals
Valve chamber 1 bottom wall 10 side wall 11
Pre-tightening force adjusting device 2 for air inlet 12 and air outlet 13
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present invention. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.
The pressure valve for a superconducting magnet vessel according to the present invention will be described in detail with reference to the accompanying drawings. The features of the following examples and embodiments may be combined with each other without conflict.
Referring to fig. 1, a pressure valve 100 for a superconducting magnet vessel according to the present invention is assembled on the superconducting magnet vessel, and includes a valve cavity 1, a pretightening force adjusting device 2 disposed at the top of the valve cavity 1, a sealing plate disposed in the valve cavity 1, and a sealing member disposed between the sealing plate and the inner wall of the valve cavity 1. The pretightening force adjusting device 2 is provided with an elastic piece 3, and the other end of the elastic piece 3 is fixed on the sealing plate. An air inlet 12 is arranged on the bottom wall 10 of the valve cavity 1, and an air outlet 13 is arranged on the side wall 11 of the valve cavity 1 at a position close to the bottom wall 10. The sealing elements comprise a first sealing element 4 and a second sealing element 5, and the first sealing element 4 is used for sealing the pretightening force adjusting device 2 and the elastic element 3. The second sealing member 5 is used for sealing the air inlet 12. The elastic part 3 is isolated from the atmosphere or the environment, and the elastic part 3 acts on the sealing part, so that the opening pressure of the pressure valve is only related to the elastic part 3 and is not influenced by the atmosphere or the surrounding environment, and the pressure inside the superconducting magnet is controlled to be a constant value. The pretightening force adjusting device can adjust the pretightening force of the elastic piece 3 and simultaneously keeps sealing with the valve cavity 1.
The gas in the superconducting magnet container pushes the second sealing element 5 and the gas inlet 12 to be unsealed, and then the gas is discharged through the gas outlet 13, and the first sealing element 4 is still in sealing connection with the pretightening force adjusting device 2 and the elastic element 3. The second seal 5 fails during venting and the first seal 4 remains well sealed against atmospheric or ambient pressure, ensuring that the pressure regulation of the pressure valve is only related to the pressure inside the superconducting magnet vessel to which the flexible member 3 is subjected. The first sealing element 4 and the second sealing element 5 are made of rubber or teflon or are sealed by special processing surfaces. The sealing effect can be achieved only in the environment of the superconducting magnet container, and the sealing effect is not particularly limited in the application. When the pressure valve is operated, the second sealing member 5 is failed, but the first sealing member 4 still maintains sealing performance, and gas escaping from the gas inlet 12 is exhausted from the gas outlet 13.
Specifically, a first fixing part is arranged on the sealing plate 6 or the inner wall of the valve cavity 1 for fixing the first sealing element 4. The first sealing element 4 is fixed with the sealing plate 6 or the inner wall of the valve cavity 1, so that the flexibility of arrangement of the first sealing element 4 is increased, and the product adaptability is improved.
And a second fixing part is arranged on the sealing plate 6 or the inner wall of the valve cavity 1 and used for fixing the second sealing element 5. The second sealing member 5 is fixed with the sealing plate 6 or the inner wall of the valve cavity 1, so that the flexibility of the arrangement of the second sealing member 5 is increased, and the product adaptability is improved.
The sealing plate 6 is of an integrated U-shaped structure. The elastic member 3 is disposed in the U-shaped cavity of the sealing plate 6. The opening of the U-shaped structure faces to one side where the elastic piece 3 and the pretightening force adjusting device 2 are assembled, the first sealing piece 4 is located between the side wall 11 of the sealing plate 6 and the side wall 11 of the valve cavity 1, the second sealing piece 5 is located between the bottom wall 10 of the sealing plate 6 and the bottom wall 10 of the valve cavity 1, and the air inlet 12 is arranged in the middle of the bottom wall 10 of the valve cavity 1. The U-shaped sealing plate 6 increases the sealing performance of the first sealing member 4 with respect to the valve chamber 1 to ensure that the elastic member 3 is isolated from the atmosphere or the environment during the pressure control.
Referring to fig. 2, in another embodiment, the valve cavity is disposed in the same manner as in the previous embodiment, and is not further described herein; the difference lies in the structural arrangement of the sealing plate and the elastic piece.
Specifically, the elastic element 3 is disposed in the flexible rotating element 7, and the sealing plate includes a first sealing plate 8 located between the elastic element 3 and the pretightening force adjusting device 2, and a second sealing plate 9 located between the bottom end of the elastic element 3 and the bottom wall 10 of the valve cavity 1. The first sealing plate 8 and the second sealing plate 9 are arranged in parallel.
A first sealing element 4 is arranged between the first sealing plate 8 and the inner wall of the valve cavity 1; and a second sealing element 5 is arranged between the second sealing plate 9 and the bottom wall 10 of the valve cavity 1. The first sealing plate 8 and the first sealing member 4 ensure that the elastic member 3 is isolated from the atmosphere or the environment, and the cooperation of the second sealing member 5 and the second sealing plate 9 keeps the pressure in the superconducting magnet container within a safe range. A flexible rotary element 7, a first sealing plate 8 and a second sealing plate 9 are used for forming a closed space, and the influence of the atmosphere or the ambient pressure on the first sealing plate 8 and the second sealing plate 9 is isolated; the force of the air inlet 12 acting on the second sealing plate 9 is not influenced by the atmospheric or environmental pressure; the pretightening force adjusting device 2 can adjust the pretightening force of the elastic piece and keeps sealing with the first sealing plate 8; therefore, the internal pressure of the superconducting magnet is constantly controlled and is not influenced by the atmospheric pressure or the environmental pressure.
In the present embodiment, the flexible rotary element 7 is any one of a dense air-impermeable film, a corrugated teflon film, and a welded metal bellows.
The elastic member 3 is any one of a compression spring, a belleville spring or an elastic corrugated tube.
The valve cavity 1 is made of any one of stainless steel, aluminum alloy, magnesium aluminum alloy, nylon or PEEK.
The air inlet 12 adopts one of KF and CF flanges or one of NPT threaded joint and ferrule joint.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A superconducting magnet vessel pressure valve is assembled on a superconducting magnet vessel, and is characterized in that: the valve cavity comprises a valve cavity body (1), a pretightening force adjusting device (2) arranged at the top of the valve cavity body (1), a sealing plate arranged in the valve cavity body (1) and a sealing element positioned between the sealing plate and the inner wall of the valve cavity body (1), wherein an elastic piece (3) is arranged on the pretightening force adjusting device (2), the other end of the elastic piece (3) is fixed on the sealing plate, an air inlet (12) is arranged on the bottom wall (10) of the valve cavity body, and an air outlet (13) is arranged on the side wall (11) of the valve cavity body at a position close to the bottom wall (10); the sealing element comprises a first sealing element (4) and a second sealing element (5), the first sealing element (4) is used for sealing the pre-tightening force adjusting device (2) and the elastic element (3), and the second sealing element (5) is used for sealing the air inlet (12).
2. The pressure valve for a superconducting magnet container according to claim 1, wherein the gas pressure in the superconducting magnet container pushes the second sealing element (5) to be unsealed from the gas inlet (12), and then the gas is exhausted through the gas outlet (13), and the first sealing element (4) is still in sealing connection with the preload adjusting device (2) and the elastic element (3).
3. A pressure valve for a superconducting magnet vessel according to claim 2, wherein a first holding portion is provided on the sealing plate (6) or on an inner wall of the valve cavity (1) for fixing the first sealing member (4).
4. A pressure valve for a superconducting magnet vessel according to claim 3, wherein a second holding portion is provided on the sealing plate (6) or on an inner wall of the valve cavity (1) for fixing the second sealing member (5).
5. The pressure valve for a superconducting magnet container according to any one of claims 1 to 4, wherein the sealing plate (6) is of a one-piece U-shaped structure, the elastic member (3) is disposed in the U-shaped cavity of the sealing plate (6), the first sealing member (4) is located between a side wall of the sealing plate (6) and a side wall (11) of the valve cavity (1), and the second sealing member (5) is located between a bottom wall of the sealing plate (6) and a bottom wall (10) of the valve cavity (1).
6. The pressure valve for the superconducting magnet container according to claim 1 or 2, wherein the elastic member (3) is arranged in a flexible rotary element (7), the sealing plates comprise a first sealing plate positioned between the elastic member (3) and the pretightening force adjusting device (2) and a second sealing plate positioned between the bottom end of the elastic member (3) and the bottom wall (10) of the valve cavity (1), and a first sealing element (4) is arranged between the first sealing plate and the inner wall of the valve cavity (1); and a second sealing piece (5) is arranged between the second sealing plate and the bottom wall (10) of the valve cavity (1).
7. Pressure valve for a superconducting magnet vessel according to claim 6, wherein the flexible revolving element (7) is any one of a dense gas-impermeable film, a corrugated teflon film, a welded metal bellows.
8. The pressure valve for a superconducting magnet vessel according to any one of claims 1 to 4 or 7, wherein the elastic member (3) is any one of a compression spring, a belleville spring, or an elastic bellows.
9. The pressure valve for a superconducting magnet vessel according to claim 8, wherein the valve cavity (1) is made of any one of stainless steel, aluminum alloy, magnesium aluminum alloy, nylon or PEEK.
10. The pressure valve for superconducting magnet vessels according to claim 8, wherein the gas inlet (12) adopts one of KF and CF flanges or one of NPT threaded joint and ferrule joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910944043.8A CN110686107A (en) | 2019-09-30 | 2019-09-30 | Pressure valve for superconducting magnet container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910944043.8A CN110686107A (en) | 2019-09-30 | 2019-09-30 | Pressure valve for superconducting magnet container |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110686107A true CN110686107A (en) | 2020-01-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910944043.8A Pending CN110686107A (en) | 2019-09-30 | 2019-09-30 | Pressure valve for superconducting magnet container |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110686107A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101581524A (en) * | 2008-05-12 | 2009-11-18 | 西门子磁体技术有限公司 | Passive overpressure and underpressure protection for a cryogen vessel |
| CN202927174U (en) * | 2012-10-25 | 2013-05-08 | 上海联影医疗科技有限公司 | Superconducting magnet pressure discharge valve and pressure discharging system |
| CN106164551A (en) * | 2014-04-03 | 2016-11-23 | 西门子医疗有限公司 | For comprising pressure limiting valve and the superconducting magnet of the cryostat of cold-producing medium |
| CN108916433A (en) * | 2018-06-12 | 2018-11-30 | 上海东软医疗科技有限公司 | pressure relief device |
-
2019
- 2019-09-30 CN CN201910944043.8A patent/CN110686107A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101581524A (en) * | 2008-05-12 | 2009-11-18 | 西门子磁体技术有限公司 | Passive overpressure and underpressure protection for a cryogen vessel |
| JP2009278093A (en) * | 2008-05-12 | 2009-11-26 | Siemens Magnet Technology Ltd | Passive overpressure and underpressure protection for cryogen vessel |
| CN202927174U (en) * | 2012-10-25 | 2013-05-08 | 上海联影医疗科技有限公司 | Superconducting magnet pressure discharge valve and pressure discharging system |
| CN106164551A (en) * | 2014-04-03 | 2016-11-23 | 西门子医疗有限公司 | For comprising pressure limiting valve and the superconducting magnet of the cryostat of cold-producing medium |
| CN108916433A (en) * | 2018-06-12 | 2018-11-30 | 上海东软医疗科技有限公司 | pressure relief device |
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Application publication date: 20200114 |