CN201779345U - Gas pressure display valve and gas pressure display device with the same - Google Patents
Gas pressure display valve and gas pressure display device with the same Download PDFInfo
- Publication number
- CN201779345U CN201779345U CN2010201423138U CN201020142313U CN201779345U CN 201779345 U CN201779345 U CN 201779345U CN 2010201423138 U CN2010201423138 U CN 2010201423138U CN 201020142313 U CN201020142313 U CN 201020142313U CN 201779345 U CN201779345 U CN 201779345U
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- CN
- China
- Prior art keywords
- valve
- spool
- gas pressure
- binding nut
- valve pocket
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- Expired - Fee Related
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- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
The utility model provides a gas pressure display valve, aiming at solving the problem that whether the gas pressure display valve is closed or not cannot be determined after a gas pressure display device in the prior art is used. The gas pressure display valve comprises a valve body, a spool and a tightening nut. A gas passage is arranged in the spool and consists of a radial through hole and an axial blind hole which are communicated with each other in the spool. A first sealing element and a second sealing element are respectively arranged at the front end and the rear end of the radial through hole. When the first sealing element is in a sealed state, the second sealing element is in a non-sealed state and is used for emptying pressure gas between the gas display valve and a pressure gauge to realize that the pressure gauge has no pressure load in a non-working stage. Moreover, the stage of the gas pressure display valve can be accurately judged and the accidents that gas leaks and the pressure gauge flies off under stress can be avoided.
Description
Technical field
The utility model relates to a kind of barometric surveying element, and particularly a kind of gas pressure shows valve and adopts this gas pressure to show the gas pressure display unit of valve.
Background technique
The gas pressure display unit is used in engineering widely as a kind of measuring cell.Gas pressure display unit of the prior art is made up of gas pressure demonstration valve and pressure gauge two-part mostly, wherein gas pressure shows that an end of valve is connected with pressure source, the other end connects pressure gauge, the pressed gas of pressure source shows that by gas pressure valve enters pressure gauge, and pressure gauge shows the pressure of pressure source.But in the operating process of reality, when opening gas pressure demonstration valve, pressure gauge is connected with pressure source, and pressure gauge shows the pressure of pressure source; And when closing gas pressure demonstration valve, pressure gauge and pressure source are isolated, and cause pressure gauge still to show pressure owing to also have pressed gas between the segment pipe that gas pressure demonstration valve is connected with pressure gauge this moment.Therefore, operator can't determine this gas pressure shows whether valve closes, and determines then to need pressure gauge is removed as need, remove pressure gauge and the stressed accident such as fly out of gas leakage, pressure gauge then may occur and take place.
The model utility content
Can't determine that in order to solve gas pressure display unit in the prior art gas pressure shows the problem whether valve has closed after use, the utility model provides a kind of gas pressure to show valve, close this gas pressure show behind valve can vent gas pressure-display valve and pressure gauge between gas, pressure gauge does not have pressure load when realizing off working state; The utility model also provides a kind of gas pressure display unit simultaneously, owing to adopted this gas pressure to show valve, therefore can obtain same beneficial technical effects.
Technological scheme:
A kind of gas pressure shows valve, comprise valve body, spool and binding nut, wherein the front end of valve body is connected with pressure source, the rear end periphery of valve body is threaded with binding nut, the inside of valve body is the valve pocket at perforation valve body two ends, described spool is positioned at the space that valve pocket inside and valve body and binding nut form, described spool comprises the spool front portion from front to back successively, spool rear portion and spool joint, described spool joint passes binding nut and is used for being connected with pressure gauge, the diameter at described spool rear portion makes the spool rear portion be positioned at the space that valve body and binding nut form greater than the maximum inner diameter of valve pocket and greater than the diameter of spool joint, offer air flue in the described spool, radial direction through hole and the axial blind hole of described air flue for being connected at valve core inside, described axial blind hole is used for being connected with manometric inlet hole, described radial direction through hole be connected with valve pocket and the outer diameter of the spool at its place less than the inner diameter of corresponding valve pocket, the described spool that is positioned at the radial direction through hole front end is provided with first seal element, when screwing binding nut, described first seal element is moved to the position that seals, when unscrewing binding nut, described first seal element withdraws from the position that seals and promptly loses seal action, the described spool and the corresponding valve body that are positioned at the radial direction through hole rear end are provided with second seal element, when unscrewing binding nut, described second seal element is moved to the position that seals, when screwing binding nut, described second seal element withdraws from the position that seals and promptly loses sealing effect.
Described binding nut is in the process that screws or unscrew, and at least one seal element is positioned at the position that seals in described first seal element and second seal element.
Described valve pocket comprises valve pocket front portion, valve pocket middle part and the valve pocket rear portion that diameter increases gradually from front to back successively, described first seal element is included in first annular groove of spool outer peripheral surface setting and is positioned at first seal ring of first annular groove, when screwing binding nut, described first seal ring matches with valve pocket middle part inwall and forms sealing, when unscrewing binding nut, described first seal ring falls back on the valve pocket rear portion, loses sealing effect.
Described first seal ring is an O type circle.
Described second seal element is included in second annular groove of valve pocket inner peripheral surface setting and is positioned at second seal ring of second annular groove and the 3rd annular groove that is provided with on the valve body relevant position, when unscrewing binding nut, described second seal ring matches with the anterior outer wall of spool and forms sealing, when screwing binding nut, described second seal ring matches with the 3rd annular groove, loses sealing effect.
Described second seal ring is an O type circle.
A kind of gas pressure display unit comprises that above-mentioned gas pressure shows valve and pressure gauge.
Described gas pressure shows that the joint between valve and the pressure gauge is lined with seal washer.
Technique effect:
The utility model provides a kind of gas pressure to show valve, include valve body, spool and binding nut, spool is positioned at the space that valve pocket inside and valve body and binding nut form, offer air flue in the spool, radial direction through hole and the axial blind hole of described air flue for being connected at valve core inside, the described spool that is positioned at the front end of radial direction through hole is provided with first seal element, when unscrewing binding nut, described first seal element loses sealing effect, promptly opened the gas pressure display unit, pressure source is connected with pressure gauge, and this moment, pressure gauge showed the gas pressure of pressure source; When screwing binding nut, described first seal element plays sealing effect, has promptly closed the gas pressure display unit, has completely cut off pressure source and be communicated with manometric.Characteristics of the present utility model are, be positioned on the described spool of rear end of radial direction through hole and the corresponding valve body and also be provided with second seal element, when unscrewing binding nut, when promptly opening the gas pressure display unit, described second seal element plays sealing effect, has prevented the fitting surface leakage of gas from valve body and spool; When screwing binding nut, promptly closed the gas pressure display unit, this moment, described second seal element lost sealing effect, and gas pressure is shown the pressed gas emptying that retains between the segment pipe that valve is communicated with pressure gauge, and pressure gauge does not have pressure load when having realized off working state.
Described binding nut is in the process that screws or unscrew, and described first seal element and second seal element do not lose sealing effect simultaneously, in order to avoid the pressed gas of pressure source leaks.
Described first seal element can adopt first annular groove and first seal ring that is positioned at first annular groove in the setting of spool outer peripheral surface, and when screwing binding nut, first seal ring matches with valve pocket middle part inwall, plays sealing effect; When unscrewing binding nut, described first seal ring falls back on the valve pocket rear portion, has lost sealing effect.
Described second seal element is included in second annular groove of valve pocket inner peripheral surface setting and is positioned at second seal ring of second annular groove and the 3rd annular groove that is provided with on the valve body relevant position, when unscrewing binding nut, described second seal ring matches with the spool outer wall and forms sealing, plays sealing effect; When screwing binding nut, described second seal ring matches with the 3rd annular groove, loses sealing effect.
The utility model also provides a kind of gas pressure display unit, comprises above-mentioned gas pressure-display valve and pressure gauge, has therefore obtained same beneficial technical effects.In addition, show that at gas pressure the joint between valve and the pressure gauge also is lined with seal washer to play seal action.
Description of drawings
The structural representation of the opening state of Fig. 1 the utility model gas pressure display unit;
The structural representation of the closed condition of Fig. 2 the utility model gas pressure display unit.
Reference character lists as follows:
1-gas pressure display unit, the 2-pressure gauge, the 3-gas pressure shows valve, 4-valve body, the 41-valve pocket, 411-valve pocket front portion, 412-valve pocket middle part, 413-valve pocket rear portion, 421-second annular groove, 422-the 2nd O type circle, 5-spool, 51-spool front portion, 52-spool rear portion, 53-spool joint, 54-air flue, 541-radial direction through hole, the 542-axial blind hole, 551-the one O type circle, 552-first annular groove, 56-the 3rd annular groove, 6-binding nut, 7-seal washer.
Embodiment
In order to make the purpose of this utility model, technological scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
As depicted in figs. 1 and 2, be the utility model gas pressure display device structure schematic representation.Wherein, gas pressure display unit 1 comprises that the gas pressure that is connected by seal washer 7 shows valve 3 and pressure gauge 2.Gas pressure shows that valve 3 is by valve body 4, spool 5 and binding nut 6 are formed, the front end of valve body 4 is connected with pressure source, the rear end periphery of valve body 4 is threaded with binding nut 6, the inside of valve body 4 is the valve pocket 41 of a perforation rear and front end, valve pocket 41 comprises valve pocket front portion 411 from front to back successively, valve pocket middle part 412 and valve pocket rear portion 413, and anterior 411 internal diameters of valve pocket are less than valve pocket middle part 412 internal diameters, valve pocket middle part 412 internal diameters are less than valve pocket rear portion 413 internal diameters, spool 5 is positioned at valve pocket middle part 412, in the space that valve pocket rear portion 413 and valve body 4 and binding nut 6 form, along with the screwing and unscrewing of binding nut 6, spool 5 relative valve bodies 4 seesaw vertically.Spool 5 comprises spool front portion 51, spool rear portion 52 and spool joint 53 successively from A-P, the main body of spool front portion 51 is positioned at valve pocket middle part 412 and valve pocket rear portion 413, the diameter at spool rear portion 52 is greater than the maximum inner diameter at valve pocket rear portion 413 and greater than the diameter of spool joint 53, therefore, spool rear portion 52 is positioned at the space of valve body 4 and binding nut 6 formation, and spool joint 53 passes binding nut 6 and is connected with pressure gauge 2.Spool 5 inside also are provided with air flue 54, air flue 54 is made up of radial direction through hole 541 that is connected and axial blind hole 542, axial blind hole 542 wherein is connected with the inlet hole of pressure gauge 2, the diameter at the spool place at described radial direction through hole 541 places promptly remains radial direction through hole 541 and is connected with valve pocket 41 less than the inner diameter of corresponding valve body.Be positioned on the spool 5 of radial direction through hole 541 front ends and offer first annular groove 552, an O type circle 551 is installed in first annular groove 552; The valve body 4 that is positioned at the rear end of radial direction through hole 541 is provided with second annular groove 421 and the 2nd O type circle 422 that is installed on it, correspondingly on spool, offer the 3rd annular groove 56, when screwing binding nut 6, second annular groove 421 and the 3rd annular groove 56 just in time match.
Wherein, O type circle can adopt other seal ring to replace, and such as lip-type packing, can reach same sealing effect.
When needing the pressure in detected pressures source, as shown in Figure 1, open gas pressure display unit 1, promptly unscrew binding nut 6, in the process that unscrews binding nut 6, second annular groove 421 and on anterior 51 outer walls of the 2nd O type circle 422 and spool match and at first form sealing, in order to avoid the pressed gas of waiting to enter in the valve pocket leaks, subsequently first annular groove 552 and on an O type circle 551 412 fall back in the valve pocket rear portion 413 from valve pocket middle part, the one O type circle 551 loses sealing effect, the pressed gas of pressure source is through valve pocket front portion 411 at this moment, valve pocket middle part 412 enters valve pocket rear portion 413, because the 2nd O type circle 422 has formed sealing with anterior 51 outer walls of spool, the pressed gas that enters valve pocket rear portion 413 just can only be entered axial blind hole 542 and then be entered pressure gauge by radial direction through hole 541, is finally shown the pressure of pressure source by pressure gauge.
After the pressure gauge detection, in the time of need closing gas pressure display unit 1, as shown in Figure 2, screw binding nut 6, in the process that screws binding nut 6, first annular groove 552 and on an O type circle 551 enter valve pocket middle part 412 from valve pocket rear portion 413 and at first form sealing, completely cut off the pressed gas of gas pressure source.Subsequently, second annular groove 421 and the 3rd annular groove 56 are involutory, make the 2nd O type circle 422 lose sealing effect, the pressed gas that are deposited in this moment in gas pressure demonstration valve 3 and the pressure gauge 2 are discharged by the gap between spool anterior 51 and the valve pocket rear portion 413, and pressure gauge does not have pressure load when having realized off working state.
Show valve 3 at the opening and closing gas pressure, promptly unscrew and screw in the process of binding nut 6 that an O type circle and the 2nd O type circle can not lose sealing effect simultaneously, that is to say to have at least to play a sealing effect at one time, in order to avoid pressed gas leaks.
Claims (7)
1. a gas pressure shows valve, comprise valve body, spool and binding nut, wherein the front end of valve body is connected with pressure source, the rear end periphery of valve body is threaded with binding nut, the inside of valve body is the valve pocket at perforation valve body two ends, described spool is positioned at the space that valve pocket inside and valve body and binding nut form, described spool comprises the spool front portion from front to back successively, spool rear portion and spool joint, described spool joint passes binding nut and is used for being connected with pressure gauge, the diameter at described spool rear portion makes the spool rear portion be positioned at the space that valve body and binding nut form greater than the maximum inner diameter of valve pocket and greater than the diameter of spool joint, offer air flue in the described spool, radial direction through hole and the axial blind hole of described air flue for being connected at valve core inside, described axial blind hole is used for being connected with manometric inlet hole, described radial direction through hole be connected with valve pocket and the outer diameter of the spool at its place less than the inner diameter of corresponding valve pocket, the described spool that is positioned at the radial direction through hole front end is provided with first seal element, when screwing binding nut, described first seal element is moved to the position that seals, when unscrewing binding nut, described first seal element withdraws from the position that seals and promptly loses seal action, it is characterized in that, the described spool and the corresponding valve body that are positioned at the radial direction through hole rear end are provided with second seal element, when unscrewing binding nut, described second seal element is moved to the position that seals, when screwing binding nut, described second seal element withdraws from the position that seals and promptly loses sealing effect.
2. a kind of gas pressure according to claim 1 shows valve, it is characterized in that, described valve pocket comprises valve pocket front portion, valve pocket middle part and the valve pocket rear portion that diameter increases gradually from front to back successively, described first seal element is included in first annular groove of spool outer peripheral surface setting and is positioned at first seal ring of first annular groove, when screwing binding nut, described first seal ring matches with valve pocket middle part inwall and forms sealing, when unscrewing binding nut, described first seal ring falls back on the valve pocket rear portion, loses sealing effect.
3. a kind of gas pressure according to claim 2 shows valve, it is characterized in that described first seal ring is an O type circle.
4. show valve according to the described a kind of gas pressure of claim 1-3, it is characterized in that, described second seal element is included in second annular groove of valve pocket inner peripheral surface setting and is positioned at second seal ring of second annular groove and the 3rd annular groove that is provided with on the valve body relevant position, when unscrewing binding nut, described second seal ring matches with the anterior outer wall of spool and forms sealing, when screwing binding nut, described second seal ring matches with the 3rd annular groove, loses sealing effect.
5. a kind of gas pressure according to claim 4 shows valve, it is characterized in that described second seal ring is an O type circle.
6. a gas pressure display unit is characterized in that, comprises as the described a kind of gas pressure of one of claim 1-5 showing valve and pressure gauge.
7. a kind of gas pressure display unit according to claim 6 is characterized in that, described gas pressure shows that the joint between valve and the pressure gauge is lined with seal washer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201423138U CN201779345U (en) | 2010-03-26 | 2010-03-26 | Gas pressure display valve and gas pressure display device with the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201423138U CN201779345U (en) | 2010-03-26 | 2010-03-26 | Gas pressure display valve and gas pressure display device with the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201779345U true CN201779345U (en) | 2011-03-30 |
Family
ID=43792556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201423138U Expired - Fee Related CN201779345U (en) | 2010-03-26 | 2010-03-26 | Gas pressure display valve and gas pressure display device with the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201779345U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043428A (en) * | 2014-03-31 | 2015-11-11 | Skf公司 | Module for detecting a physical value of a gaseous medium |
| CN105134971A (en) * | 2015-09-28 | 2015-12-09 | 苏州洛特兰新材料科技有限公司 | Check valve for ammonia |
-
2010
- 2010-03-26 CN CN2010201423138U patent/CN201779345U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043428A (en) * | 2014-03-31 | 2015-11-11 | Skf公司 | Module for detecting a physical value of a gaseous medium |
| CN105043428B (en) * | 2014-03-31 | 2020-01-14 | Skf公司 | Module for detecting a physical quantity of a gaseous medium |
| CN105134971A (en) * | 2015-09-28 | 2015-12-09 | 苏州洛特兰新材料科技有限公司 | Check valve for ammonia |
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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: 20110330 Termination date: 20180326 |