CN203516890U - Ultra-low-temperature vacuum protective valve - Google Patents
Ultra-low-temperature vacuum protective valve Download PDFInfo
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- CN203516890U CN203516890U CN201320625661.4U CN201320625661U CN203516890U CN 203516890 U CN203516890 U CN 203516890U CN 201320625661 U CN201320625661 U CN 201320625661U CN 203516890 U CN203516890 U CN 203516890U
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Abstract
The utility model relates to a vacuum protective valve, in particular to an ultra-low-temperature vacuum protective valve required by the industries such as chemical engineering, industrial and mining enterprises and national defense scientific research. The ultra-low-temperature vacuum protective valve comprises a vacuum valve body. The vacuum valve body is provided with a cylindrical outer connecting wall and connected with a vacuum sleeve in a sleeved mode along the outer connecting wall, an atmosphere through hole is formed in the vacuum sleeve, a limiting table for limiting the vacuum sleeve is arranged along the periphery of the outer connecting wall of the vacuum valve body, and a vacuum plug is arranged at the position where the vacuum valve body is communicated with the vacuum sleeve. The vacuum plug comprises a sealing plug column and a sealing plug disc, wherein the sealing plug column can move in the vacuum valve body, the sealing plug disc is integrally connected with the sealing plug column and can move in the vacuum sleeve, annular concave sealing grooves are formed in the sealing plug column, inner sealing rings are arranged between the concave sealing grooves and the vacuum valve body, an outer sealing ring is arranged in the area defined by the sealing plug disc, the end portion of the vacuum valve body and the inner wall of the vacuum sleeve, and the functions of vacuum sealing and overpressure protection can be effectively achieved.
Description
Technical field
the utility model relates to vacuum protective valve, relates in particular to the required used at ultra-low temperature vacuum protective valves of industry such as a kind of chemical industry, industrial and mining enterprise, national defence scientific research.
Background technique
vacuum protective valve mainly compresses valve gap by spring force at present, by linear sealing, makes itself and valve seat realize sealing or adopts hydraulic seal to guarantee 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, when too greatly vacuum chamber internal pressure increases, can not open fast, and protection vaccum case, too littlely can not effectively realize vacuum seal; 2) liquid sealing structure need to pour into seal fluid in vacuum tube, but in ultralow temperature (196 ℃) Environmental Conditions, the easy ice of conventional seal fluid changes into solid-state, can not be for ultra-low temperature surroundings.Have again the modified model of improvement vacuum protective valve, the disclosed vacuum protective valve the present invention of China Patent No.: 201010241623.X has 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 with spool butt; Drive link, is placed in upper valve body and movable valve seat, and with spool butt; Pressure-sensitive chamber, is connected in upper valve body, and with drive link butt.Its solves in prior art, because avoiding vacuum crosstalk phenomenon to cause vacuum system in vacuum hold and destroying that the operating mode down-off of vacuum is too small, vacuum terminal response Speed Reduction, and the technical problem such as impact destruction vacuum, high-pressure blowing operating mode even.But this model utility is for normal temperature equipment development, and for vacuum failure under ultra-low temperature surroundings, the safety issue producing when sealing declines can not be accomplished good solution.
Model utility content
the purpose of this utility model is to provide a kind of used at ultra-low temperature vacuum protective valve that can effectively realize vacuum seal and overpressure protection function.
above-mentioned technical purpose of the present utility model 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, along described connection outer wall, be socketed with vacuum envelope, on described vacuum envelope, have large vent hole, described vacuum valve body is provided with for limiting the limit dais of 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 connected movable sealing plug dish in described vacuum envelope with described sealing stick harness one, described sealing stick harness is provided with annular depression seal groove, between described depression seal groove and described vacuum valve body, be provided with inner seal ring, described sealing plug dish, in the region surrounding between the end of described vacuum valve body and described vacuum envelope inwall three, be provided with exterior seal ring.
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 atmosphere is connected, its pressure P 1 equals atmospheric pressure, P1 > P2, under pressure difference effect, vacuum stopper and vacuum valve are shown consideration for tight, exterior seal ring compression, realize end face seal, add in addition inner seal ring sealing, guaranteed the reliability of sealing.In vacuum chamber because internal cavity medium is revealed; when pressure raises; during to P2 >=P1, the pressure difference that acts on vacuum stopper disappears, and seal ring seal compression disappears; seal failure; cavity pressure discharges, protection vaccum case, the Security that has improved equipment; avoid housing to continue supercharging, occurred bursting accident.
as to of the present utility model preferably, inner seal ring and exterior seal ring are O RunddichtringO.
as to of the present utility model preferably, large vent hole is positioned at same level position and is symmetry shape and distributes on vacuum envelope.Effectively improve the stability of vacuum seal and vacuum overpressure protection
as to of the present utility model preferred, seal stick harness and be provided with the depression seal groove that three road vertical directions are arranged in parallel.Improve the stability of structure and the reliability of sealing.
as to of the present utility model preferably, the perpendicular distance between adjacent recessed seal groove all equates.Improve the Security of the stability of structure, the reliability of sealing and overpressure protection.
the beneficial effects of the utility model: the utility model vacuum valve body embed vacuum envelope overlap with; Vacuum stopper embed vacuum valve body overlap with.Vacuum valve body hollow, is not connected with negative pressure generation equipment with vacuum envelope fit end.Vacuum envelope is provided with large vent hole, and large vent hole is connected with atmosphere.Between the port of vacuum stopper and vacuum valve body, be provided with exterior seal ring.During extracting vacuum, vacuum valve (connection vacuum chamber) internal pressure is negative pressure, vacuum envelope is provided with large vent hole and atmosphere is connected, and internal pressure equals atmospheric pressure, under pressure difference effect, vacuum stopper and vacuum valve are shown consideration for tight, exterior seal ring compression, realizes end face seal, simultaneously, the reliability of sealing has been guaranteed in the design of inner seal ring, and inside and outside seal ring closely cooperates and further guaranteed the reliability sealing with other structural members.
Accompanying drawing explanation
fig. 1 is the utility model embodiment 1 structural representation.
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 to explanation of the present utility model; it is not to restriction of the present utility model; those skilled in the art can make to the present embodiment the modification that there is no creative contribution as required after reading this specification, but as long as within the scope of claim of the present utility model, are all subject to the protection of Patent Law.
Claims (5)
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), along described connection outer wall (10), be socketed with vacuum envelope (2), on described vacuum envelope (2), have large vent hole (20), described vacuum valve body (1) is provided with for limiting the limit dais (11) of described vacuum envelope (2) position along described connection outer wall (10) periphery, described vacuum valve body (1) is provided with vacuum stopper (3) with described vacuum envelope (2) connectivity part, described vacuum stopper (3) comprises movable sealing stick harness (31) in described vacuum valve body (1) and is connected movable sealing plug dish (32) in described vacuum envelope (2) with described sealing stick harness (31) one, described sealing stick harness (31) is provided with annular depression seal groove (310), between described depression seal groove (310) and described vacuum valve body (1), be provided with inner seal ring (4), described sealing plug dish (32), in the region surrounding between the end of described vacuum valve body (1) and described vacuum envelope (2) inwall three, be provided with exterior seal ring (5).
2. a kind of used at ultra-low temperature vacuum protective valve according to claim 1, is characterized in that: inner seal ring (4) and exterior seal ring (5) are O RunddichtringO.
3. a kind of used at ultra-low temperature vacuum protective valve according to claim 1 and 2, is characterized in that: large vent hole (20) is positioned at same level position and is symmetry shape and distributes on vacuum envelope (2).
4. a kind of used at ultra-low temperature vacuum protective valve according to claim 1 and 2, is characterized in that: sealing stick harness (31) is provided with the depression seal groove (310) that three road vertical directions are arranged in parallel.
5. a kind of used at ultra-low temperature vacuum protective valve according to claim 4, is characterized in that: the perpendicular distance between adjacent recessed seal groove (310) all equates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320625661.4U CN203516890U (en) | 2013-10-11 | 2013-10-11 | Ultra-low-temperature vacuum protective valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320625661.4U CN203516890U (en) | 2013-10-11 | 2013-10-11 | Ultra-low-temperature vacuum protective valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203516890U true CN203516890U (en) | 2014-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320625661.4U Expired - Fee Related CN203516890U (en) | 2013-10-11 | 2013-10-11 | Ultra-low-temperature vacuum protective valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203516890U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486308A (en) * | 2013-10-11 | 2014-01-01 | 湖州三井低温设备有限公司 | Vacuum protection valve used at super-low temperature |
-
2013
- 2013-10-11 CN CN201320625661.4U patent/CN203516890U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486308A (en) * | 2013-10-11 | 2014-01-01 | 湖州三井低温设备有限公司 | Vacuum protection valve used at super-low temperature |
| CN103486308B (en) * | 2013-10-11 | 2015-12-09 | 湖州三井低温设备有限公司 | A kind of used at ultra-low temperature vacuum protective valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140402 Termination date: 20161011 |