CN103486308B - A kind of used at ultra-low temperature vacuum protective valve - Google Patents
A kind of used at ultra-low temperature vacuum protective valve Download PDFInfo
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- CN103486308B CN103486308B CN201310471698.0A CN201310471698A CN103486308B CN 103486308 B CN103486308 B CN 103486308B CN 201310471698 A CN201310471698 A CN 201310471698A CN 103486308 B CN103486308 B CN 103486308B
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- Prior art keywords
- vacuum
- valve body
- envelope
- vacuum valve
- described vacuum
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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
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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
- F16K51/00—Other details not peculiar to particular types of valves or cut-off apparatus
- F16K51/02—Other details not peculiar to particular types of valves or cut-off apparatus specially adapted for high-vacuum installations
Abstract
<b> the present invention relates to vacuum protective valve, particularly relate to a kind of chemical industry, industrial and mining enterprise, used at ultra-low temperature vacuum protective valve needed for the industries such as national defence scientific research, comprise vacuum valve body, vacuum valve body has columniform connection outer wall, vacuum envelope is socketed with along connection outer wall, vacuum envelope has large vent hole, vacuum valve body is provided with the limit dais for limiting vacuum envelope position along connection outer wall periphery, vacuum valve body and vacuum envelope connectivity part are provided with vacuum stopper, vacuum stopper comprises movable sealing stick harness in vacuum valve body and is integrally connected movable sealing plug dish in vacuum envelope with sealing stick harness, sealing stick harness is provided with the depression seal groove of annular, inner seal ring is provided with between depression seal groove and vacuum valve body, sealing plug dish, exterior seal ring is provided with in the region surrounded between the end of vacuum valve body and vacuum envelope inwall three, effectively can realize vacuum seal and overpressure protection function.</b>
Description
Technical field
the present invention relates to vacuum protective valve, particularly relate to the used at ultra-low temperature vacuum protective valve needed for industry such as a kind of chemical industry, industrial and mining enterprise, national defence scientific research.
Background technique
current vacuum protective valve compresses valve gap mainly through spring force, by linear sealing, makes itself and valve seat realize sealing or adopt hydraulic seal to ensure its vacuum seal.1) under spring force structure, vacuum seal mainly relies on spring force to realize, very high to the requirement of spring force, can not open fast when then vacuum chamber internal pressure increases too greatly, protection vaccum case, too little, effectively can not realize vacuum seal; 2) liquid sealing structure, needs to pour into seal fluid in vacuum tube, but in ultralow temperature (-196 DEG C) Environmental Conditions, the easy ice of conventional seal fluid changes into solid-state, can not be used for ultra-low temperature surroundings.Have again and improve modified model vacuum protective valve, China Patent No.: the vacuum protective valve disclosed in 201010241623.X present invention is disclosed a kind of vacuum protective valve, comprising: upper valve body; Lower valve body, with described upper valve body fit; Adjusting bolt, is connected with lower valve body; Spool, is placed in lower valve body, and with adjusting bolt fit; Movable valve seat, is placed in lower valve body, and abuts with spool; Drive link, is placed in upper valve body and movable valve seat, and abuts with spool; Pressure-sensitive chamber, is connected to upper valve body, and abuts with drive link.Its solves in prior art, and cause because avoiding vacuum crosstalk phenomenon vacuum system in vacuum hold and destroy that the operating mode down-off of vacuum is too small, vacuum terminal response speed reduces, even impact destroys the technical problem such as vacuum, high-pressure blowing operating mode.But this invention is for normal temperature equipment development, for vacuum failure under ultra-low temperature surroundings, the safety issue produced when sealing declines can not accomplish good solution.
Summary of the invention
the object of this invention is to provide a kind of used at ultra-low temperature vacuum protective valve that effectively can realize vacuum seal and overpressure protection function.
above-mentioned technical purpose of the present invention is achieved by the following technical programs: a kind of used at ultra-low temperature vacuum protective valve, comprise vacuum valve body, described vacuum valve body has columniform connection outer wall, vacuum envelope is socketed with along described connection outer wall, described vacuum envelope has large vent hole, described vacuum valve body is provided with the limit dais for limiting described vacuum envelope position along described connection outer wall periphery, described vacuum valve body and described vacuum envelope connectivity part are provided with vacuum stopper, described vacuum stopper comprises movable sealing stick harness in described vacuum valve body and is integrally connected movable sealing plug dish in described vacuum envelope with described sealing stick harness, described sealing stick harness is provided with the depression seal groove of annular, inner seal ring is provided with between described depression seal groove and described vacuum valve body, described sealing plug dish, exterior seal ring is provided with in the region surrounded between the end of described vacuum valve body and described vacuum envelope inwall three.
in technique scheme, during extracting vacuum, vacuum valve body (connection vacuum chamber) internal pressure P2 is negative pressure, and vacuum envelope is provided with large vent hole and air is connected, its pressure P 1 equals atmospheric pressure, P1 > P2, under pressure difference effect, vacuum stopper and vacuum valve are shown consideration for tightly, exterior seal ring compresses, realize end face seal, add that inner seal ring seals in addition, ensure that the reliability of sealing.When in vacuum chamber due to internal cavity medium reveal; when pressure raises; during to P2 >=P1, act on the pressure difference ends of vacuum stopper, seal ring seal compression disappears; seal failure; cavity pressure discharges, and protection vaccum case, improves the Security of equipment; avoid housing and continue supercharging, occur bursting accident.
as to preferably of the present invention, inner seal ring and exterior seal ring are O RunddichtringO.
as to preferably of the present invention, large vent hole is positioned at same level position and symmetrically shape distribution on vacuum envelope.The stability of effective raising vacuum seal and vacuum overpressure protection
as to preferably of the present invention, seal stick harness and be provided with three road vertical directions depression seal groove arranged in parallel.Improve the stability of structure and the reliability of sealing.
as to preferably of the present invention, the perpendicular distance between adjacent recessed seal groove is all equal.Improve the Security of the stability of structure, the reliability of sealing and overpressure protection.
beneficial effect of the present invention: vacuum valve body of the present invention embed vacuum envelope carry out cover with; Vacuum stopper embed vacuum valve body carry out cover with.Vacuum valve body hollow, does not produce equipment with vacuum envelope fit end and negative pressure and is connected.Vacuum envelope is provided with large vent hole, and large vent hole is connected with air.Exterior seal ring is provided with between the port of vacuum stopper and vacuum valve body.During extracting vacuum, vacuum valve (connection vacuum chamber) internal pressure is negative pressure, vacuum envelope is provided with large vent hole and air is connected, and internal pressure equals atmospheric pressure, under pressure difference effect, vacuum stopper and vacuum valve are shown consideration for tightly, exterior seal ring compresses, and realizes end face seal, simultaneously, the design of inner seal ring ensure that the reliability of sealing, and inside and outside seal ring and other structural members closely cooperate and further ensure that the reliability of sealing.
Accompanying drawing explanation
fig. 1 is the structural representation of the embodiment of the present invention 1.
in figure: 1, vacuum valve body, 10, connect outer wall, 11, limit dais, 2, vacuum envelope, 20, large vent hole, 3, vacuum stopper, 31, sealing stick harness, 32, sealing plug dish, 310, depression seal groove, 4, inner seal ring, 5, exterior seal ring.
Embodiment
following specific embodiment is only explanation of the invention; it is not limitation of the present invention; those skilled in the art can make to the present embodiment the amendment not having creative contribution as required after reading this specification, as long as but be all subject to the protection of Patent Law in right of the present invention.
embodiment 1, as shown in Figure 1, a kind of used at ultra-low temperature vacuum protective valve, comprise vacuum valve body 1, vacuum valve body 1 has columniform connection outer wall 10, vacuum envelope 2 is socketed with along connection outer wall 10, vacuum envelope 2 has large vent hole 20, vacuum valve body 1 is provided with the limit dais 11 for limiting vacuum envelope 2 position along connection outer wall 10 periphery, vacuum valve body 1 and vacuum envelope 2 connectivity part are provided with vacuum stopper 3, vacuum stopper 3 comprises movable sealing stick harness 31 in vacuum valve body 1 and is integrally connected movable sealing plug dish 32 in vacuum envelope 2 with sealing stick harness 31, sealing stick harness 31 is provided with the depression seal groove 310 of annular, inner seal ring 4 is provided with between depression seal groove 310 and vacuum valve body 1, sealing plug dish 32, exterior seal ring 5 is provided with in the region surrounded between the end of vacuum valve body 1 and vacuum envelope 2 inwall three.Inner seal ring 4 and exterior seal ring 5 are O RunddichtringO.Large vent hole 20 is positioned at same level position and symmetrically shape distribution on vacuum envelope 2.Sealing stick harness 31 is provided with three road vertical directions depression seal groove 310 arranged in parallel, and the perpendicular distance between adjacent recessed seal groove 310 is all equal.
Claims (1)
1. a used at ultra-low temperature vacuum protective valve, it is characterized in that: comprise vacuum valve body (1), described vacuum valve body (1) has columniform connection outer wall (10), vacuum envelope (2) is socketed with along described connection outer wall (10), described vacuum envelope (2) has large vent hole (20), described vacuum valve body (1) is provided with the limit dais (11) for limiting described vacuum envelope (2) position along described connection outer wall (10) periphery, described vacuum valve body (1) and described vacuum envelope (2) connectivity part are provided with vacuum stopper (3), described vacuum stopper (3) comprises movable sealing stick harness (31) in described vacuum valve body (1) and is integrally connected movable sealing plug dish (32) in described vacuum envelope (2) with described sealing stick harness (31), described sealing stick harness (31) is provided with the depression seal groove (310) of annular, inner seal ring (4) is provided with between described depression seal groove (310) and described vacuum valve body (1), described sealing plug dish (32), exterior seal ring (5) is provided with in the region surrounded between the end of described vacuum valve body (1) and described vacuum envelope (2) inwall three, inner seal ring (4) and exterior seal ring (5) are O RunddichtringO, large vent hole (20) is positioned at same level position and symmetrically shape distribution on vacuum envelope (2), sealing stick harness (31) is provided with three road vertical directions depression seal groove (310) arranged in parallel, perpendicular distance between adjacent recessed seal groove (310) is all equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310471698.0A CN103486308B (en) | 2013-10-11 | 2013-10-11 | A kind of used at ultra-low temperature vacuum protective valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310471698.0A CN103486308B (en) | 2013-10-11 | 2013-10-11 | A kind of used at ultra-low temperature vacuum protective valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103486308A CN103486308A (en) | 2014-01-01 |
| CN103486308B true CN103486308B (en) | 2015-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310471698.0A Active CN103486308B (en) | 2013-10-11 | 2013-10-11 | A kind of used at ultra-low temperature vacuum protective valve |
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| CN (1) | CN103486308B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108193190B (en) * | 2017-12-28 | 2020-06-09 | 深圳市华星光电半导体显示技术有限公司 | Vacuum device |
| JP2019168074A (en) * | 2018-03-26 | 2019-10-03 | 株式会社山田製作所 | Thermo valve and method for manufacturing the same |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5350459Y2 (en) * | 1971-04-24 | 1978-12-02 | ||
| CN2532329Y (en) * | 2002-03-29 | 2003-01-22 | 孙昭楠 | Vacuum seal valve |
| US7086388B2 (en) * | 2003-08-04 | 2006-08-08 | Delphi Technologies, Inc. | Combination valve for fuel system |
| CN101235919A (en) * | 2008-03-07 | 2008-08-06 | 中国重型机械研究院 | Vacuum pump heating interlining pressure release device |
| CN102966774A (en) * | 2012-11-14 | 2013-03-13 | 金祖贻 | Pressure reducing valve |
| CN203516890U (en) * | 2013-10-11 | 2014-04-02 | 湖州三井低温设备有限公司 | Ultra-low-temperature vacuum protective valve |
-
2013
- 2013-10-11 CN CN201310471698.0A patent/CN103486308B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5350459Y2 (en) * | 1971-04-24 | 1978-12-02 | ||
| CN2532329Y (en) * | 2002-03-29 | 2003-01-22 | 孙昭楠 | Vacuum seal valve |
| US7086388B2 (en) * | 2003-08-04 | 2006-08-08 | Delphi Technologies, Inc. | Combination valve for fuel system |
| CN101235919A (en) * | 2008-03-07 | 2008-08-06 | 中国重型机械研究院 | Vacuum pump heating interlining pressure release device |
| CN102966774A (en) * | 2012-11-14 | 2013-03-13 | 金祖贻 | Pressure reducing valve |
| CN203516890U (en) * | 2013-10-11 | 2014-04-02 | 湖州三井低温设备有限公司 | Ultra-low-temperature vacuum protective valve |
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| CN103486308A (en) | 2014-01-01 |
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