CN202420765U - Gas piston type pressure gauge - Google Patents
Gas piston type pressure gauge Download PDFInfo
- Publication number
- CN202420765U CN202420765U CN2012200419581U CN201220041958U CN202420765U CN 202420765 U CN202420765 U CN 202420765U CN 2012200419581 U CN2012200419581 U CN 2012200419581U CN 201220041958 U CN201220041958 U CN 201220041958U CN 202420765 U CN202420765 U CN 202420765U
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- piston
- gas
- stop valve
- gauge
- piston system
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- Expired - Fee Related
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Abstract
The utility model discloses a gas piston type pressure gauge, which comprises a piston system. A piston rod in a piston cylinder of the piston system is coaxially connected with a cross-shaped hand wheel, a pressure cavity of the piston cylinder of the piston system is provided with three gas circuits, the first gas circuit is connected with a prepressing pump by a selector valve, the second gas circuit is connected with a second stop valve of a gauge stand by a second gauge connecting quick joint, the third gas circuit is connected with a first stop valve of the gauge stand by a piston stop valve and a first gauge connecting quick joint sequentially, a weight loading tray is disposed on the upper surface of the pressure cavity of the piston cylinder of the piston system, and gas is filled in the piston cylinder of the piston system in advance. The gas piston type pressure gauge has the advantages that working media are clean, the piston system does not need to be lubricated by oil, metering equipment calibration with high sensitivity can be realized, a calibration process is simplified, and working time is greatly shortened.
Description
Technical field
The utility model belongs to technical field of measuring equipment, and relating to pure gas need not have lubricated piston system, is specifically related to a kind of gas piston formula pressure gauge.
Background technology
Gas piston formula pressure gauge is an a kind of pressure calibration system, and it forms check system through high-sensitive piston system, and other low precision pressure instrument is carried out verification, perhaps low one-level tester is calibrated.The deficiency of existing gas piston is that its piston system needs oil injecting lubricating, if fluid has been attached on the piston system, will cause whole sensitivity to reduce, and therefore, needs further improvement.
Summary of the invention
The purpose of the utility model provides a kind of gas piston formula pressure gauge, and having solved the piston system that exists in the prior art needs oil injecting lubricating, if fluid has been attached on the piston system, and the problem that will cause whole sensitivity to reduce.
The technical scheme that the utility model adopted is; A kind of gas piston formula pressure gauge comprises piston system, and the piston rod in the piston cylinder of piston system is connected with the cross handwheel is coaxial; The piston cylinder pressure chamber of piston system is provided with three gas circuits; Article one, gas circuit is connected with the precompressed pump through reversal valve, and the second gas circuit is shown rapid-acting coupling two and is connected with gauge stand stop valve two through connecing, the 3rd gas circuit successively through the piston stop valve, connect and show rapid-acting coupling one and be connected with gauge stand stop valve one; The piston cylinder pressure chamber upper surface of piston system is that counterweight loads pallet, and preliminary filling has gas in the piston cylinder of piston system.
The beneficial effect of the utility model is, its piston system need not oil lubrication, and sensitivity significantly improves, and has improved by the precision of test examination instrument; Actuating medium cleans more, and client's calibration process is oversimplified, and greatly shortens working hours.
Description of drawings
Fig. 1 is the piston gage structural representation of the utility model;
Fig. 2 is the piston system structural representation in the piston gage of the utility model;
Fig. 3 is the piston rod construction synoptic diagram in the piston gage of the utility model.
Among the figure, 1. precompressed pump, 2. the piston stop valve 3. connects table rapid-acting coupling one, 4. connects table rapid-acting coupling two, and 5. the gauge stand stop valve one, and 6. the gauge stand stop valve two, 7. cross handwheel, 8. piston system, 9. reversal valve, 10. pallet, 11. piston rods, 12. piston cylinders.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is elaborated.
With reference to Fig. 1; The structure of the utility model device is to comprise piston system 8, piston rod 11 in the piston cylinder 12 of piston system 8 and 7 coaxial connections of cross handwheel; Piston cylinder 12 pressure chambers of piston system 8 are provided with three gas circuits; Article one, gas circuit is connected with precompressed pump 1 through reversal valve 9, and the second gas circuit is shown rapid-acting coupling 24 and is connected with gauge stand stop valve 26 through connecing, the 3rd gas circuit through piston stop valve 2, connect and show rapid-acting coupling 1 and be connected with gauge stand stop valve 1; The piston cylinder 12 pressure chamber upper surfaces of piston system 8 are that counterweight loads pallet 10, and preliminary filling has gas (high-purity nitrogen) in the piston cylinder 12 of piston system 8.
Fig. 2, Fig. 3 are piston system 8 structural representations, and the piston rod 11 in its piston system is changed former solid construction, has overcome heavier deficiency; Adopt hollow-core construction design (like Fig. 3); Alleviated weight, process of lapping changes on the whole, requires more strict.
During the work of the utility model device, can realize positive pressure pressure platform and two kinds of functions of negative pressure pressure platform.
At first, the operating process as positive pressure pressure platform is to shift reversal valve 9 onto just pressing off position B end earlier; Connecing the upward seized instrument of access of table rapid-acting coupling (3 and 4), open gauge stand stop valve (5 and 6), open piston stop valve 2 simultaneously; Be rotated counterclockwise then and withdraw from cross handwheel 7, on piston system 8, load the counterweight of corresponding calibrating pressure, with 1 precompressed of precompressed pump; Cross handwheel 7 superchargings that turn clockwise have again been identified up to the malleation stroke by this operation.
Secondly, the operating process as negative pressure pressure platform is to shift reversal valve 9 onto position A end that negative pressure is opened earlier; Insert standard scale in the rapid-acting coupling 3 connecing table, on 4, insert seized instrument, open gauge stand stop valve (5 and 6); While closure piston stop valve 2; Cross handwheel 7 turn clockwise then to lowermost end, cooperate cross handwheel 7 to be rotated counterclockwise simultaneously with the precompressed of precompressed pump and can take out negative pressure, identify up to the negative pressure stroke by this operation and accomplish.
Medium is gas (high-purity nitrogen) in the utility model piston cylinder 12, and actuating medium is cleaned more, and its piston system need not oil lubrication, and highly sensitive metering outfit verification can be provided, and calibration process is oversimplified, and greatly shortens working hours.
Claims (3)
1. gas piston formula pressure gauge; Its characteristics are: comprise piston system (8); Piston rod (11) in the piston cylinder (12) of piston system (8) and coaxial connection of cross handwheel (7); Piston cylinder (12) pressure chamber of piston system (8) is provided with three gas circuits; Article one, gas circuit is connected with precompressed pump (1) through reversal valve (9), and the second gas circuit is shown rapid-acting coupling two (4) and is connected with gauge stand stop valve two (6) through connecing, the 3rd gas circuit successively through piston stop valve (2), connect and show rapid-acting coupling one (3) and be connected with gauge stand stop valve one (5); Piston cylinder (12) the pressure chamber upper surface of piston system (8) is that counterweight loads pallet (10), and the interior preliminary filling of piston cylinder (12) of piston system (8) has gas.
2. gas piston formula pressure gauge according to claim 1, its characteristics are: described cross handwheel (7) cooperates through the four directions on the leading screw on cubic groove and the holder.
3. gas piston formula pressure gauge according to claim 1, its characteristics are: described piston rod (11) adopts hollow-core construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200419581U CN202420765U (en) | 2012-02-09 | 2012-02-09 | Gas piston type pressure gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200419581U CN202420765U (en) | 2012-02-09 | 2012-02-09 | Gas piston type pressure gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202420765U true CN202420765U (en) | 2012-09-05 |
Family
ID=46745520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200419581U Expired - Fee Related CN202420765U (en) | 2012-02-09 | 2012-02-09 | Gas piston type pressure gauge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202420765U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105181242A (en) * | 2015-05-26 | 2015-12-23 | 苏州华徕光电仪器有限公司 | Pressure checking apparatus |
| CN110160703A (en) * | 2019-05-09 | 2019-08-23 | 大连工业大学 | It is a kind of based on the counterweight loading mechanism for making pressure system |
| CN114518188A (en) * | 2021-12-30 | 2022-05-20 | 山东省计量科学研究院 | Micropressure gas piston type pressure gauge with initial value of 1KPa |
-
2012
- 2012-02-09 CN CN2012200419581U patent/CN202420765U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105181242A (en) * | 2015-05-26 | 2015-12-23 | 苏州华徕光电仪器有限公司 | Pressure checking apparatus |
| CN110160703A (en) * | 2019-05-09 | 2019-08-23 | 大连工业大学 | It is a kind of based on the counterweight loading mechanism for making pressure system |
| CN114518188A (en) * | 2021-12-30 | 2022-05-20 | 山东省计量科学研究院 | Micropressure gas piston type pressure gauge with initial value of 1KPa |
| CN114518188B (en) * | 2021-12-30 | 2024-06-11 | 山东省计量科学研究院 | Micropressure gas piston type pressure gauge with initial value of 1KPa |
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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 |
Granted publication date: 20120905 Termination date: 20150209 |
|
| EXPY | Termination of patent right or utility model |