CN2224413Y - Gas-pressure defining device - Google Patents
Gas-pressure defining device Download PDFInfo
- Publication number
- CN2224413Y CN2224413Y CN 94231571 CN94231571U CN2224413Y CN 2224413 Y CN2224413 Y CN 2224413Y CN 94231571 CN94231571 CN 94231571 CN 94231571 U CN94231571 U CN 94231571U CN 2224413 Y CN2224413 Y CN 2224413Y
- Authority
- CN
- China
- Prior art keywords
- air chamber
- nut
- pressure
- casing
- screw
- Prior art date
- 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.)
- Expired - Fee Related
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model belongs to a pneumatic pressure testing instrument, which is mainly used for the static test of various pressure differential pressure transducers. The middle lower part of the cavity of a casing composing an air chamber 2 is provided with an accordion tube shape air chamber 1 whose lower opening is fixedly connected with the inner bottom of the casing, and the lower cover of the casing is provided with a positive pressure air nozzle and a negative pressure air nozzle which are communicated with the air chamber 1 and the air chamber 2; the middle part of a small accordion tube fixedly connected with the upper opening of thecorrugated air chamber 1 is provided with a screw nut provided with an inner screw thread and an outer guide groove. The lower end of the screw nut is provided with a screw cap isolated from the air chamber 1, and the tail end of a screw rod screwed and arranged on the upper end of the screw nut is fixedly screwed with a mechanical counter positioned above a spacing cover. The utility model is suitable for the onsite test of field measurement signal.
Description
The utility model belongs to the Pneumatic pressure tester, and it is mainly used in the static check of various pressure, differential pressure pickup, can be contained in surveying instrument inside, is fit to the verification on the spot of in-site measurement instrument.
At present JM type compensate-type micropressure meter is used in the verification of pressure, differential pressure pickup more, in this microbarograph water column is arranged, need regulate level during use, when scene temperature is lower than zero degree, can not use.The verification of its performance parameter all must be in the laboratory or national metering test department regularly carry out, make troubles to work on the spot.Its measurement range can only be at 150KG/m in addition
2In, and the linearity changes with value.Its volume is big, and price is expensive, uses complicated operation.
The purpose of this utility model is the shortcoming at above-mentioned existence, and providing a kind of can carry out verification at the use scene, and measurement range is much larger than 150KG/m
2, valuator easy to use.
The utility model is based on the aerostatics principle, and that provide is a kind of inside and outside air chamber (v that is made up of many node metallic bellows
1, V
2) linear transfiguration overstocks power, differential pressure generator, i.e. pressure, pressure reduction valuator.It is characterized in that housing (5) the inner chamber middle and lower part that constitutes air chamber 2 (14) is provided with the corrugated tube shape air chamber 1 (13) that the end is connected in end opening and the housing, have malleation valve (12) and the negative pressure valve (11) that communicates with air chamber 1 and air chamber 2 at housing (5) lower cover: corrugated air chamber 1 small corrugated pipe that is connected suitable for reading (7) middle part be have internal thread and outside the nut (6) of gathering sill, the nut (8) of isolating with air chamber 1 is housed, the fastening mechanical counter (1) that places on the limited cover (2) of screw rod (3) tail end of nut (6) upper end spinning in nut (6) lower end.
When in the corrugated tube during air chamber compression Δ V volume, then the corrugated tube outer air increases Δ V volume, and pressure increases because volume reduces, and pressure reduces otherwise volume increases, and two air chamber pressure reduction are their pressure poor.Above-mentioned each pressure, pressure difference signal are entered pressure, differential pressure pickup air chamber by transmission pipeline (test precision for what guarantee pressure signal, above-mentioned volume comprises transmission pipeline and sensor air chamber), we by the sensor output voltage signal can with its input pressure, pressure difference signal contrast is calibrated.
The utility model has the advantages that: the inner static check that also can be used for various water column stage pressures, differential pressure pickup of the measuring instrument of can packing into is suitable for the verification on the spot of in-site measurement signal; Measurement range is 0～± 2000KG/m
2, good linearity, anti-vibration, serviceability temperature scope are at-50 ℃～+ 200 ℃.Easy for operation, volume only is 1/6 of a JM microbarograph, and price is 1/5 of a microbarograph.It is simple in structure, is easy to processing, and is easy to utilize.
Accompanying drawing is a structural representation of the present utility model.
As shown in drawings, it comprises 13 kinds of machineries part in addition, their the assembling kind of drive is as follows: the nut (6) that internal thread and gathering sill will be arranged earlier is connected and guarantees with big corrugated tube (9) with nut (8) and seals, and then have the small corrugated pipe (7) of O-ring seal to be welded on big corrugated tube 99 upper end) on, at last big corrugated tube is welded on the lower cover (10) of O-ring seal, during assembling, the upper part housing (5) of packing into, and it is tightened up with screw (12), the loam cake (4) that O-ring seal will be arranged is with leading on it after rib aims at nut (6) location that guide groove is arranged, itself and shell combination screw rod (3) are screwed in the nut (6), again limited cover (2) is aimed at housing, be assembled into one together with clamp-screw (12).Mechanical counter (1) is placed on the limited cover (2), with screw (12) mechanical counter (1) and screw rod (3) is fastened as one.More than assembling finishes, and rotates counter by hand, then by the engagement of screw rod and nut big corrugated tube is rotated in predetermined stroke up and down, sails the inside and outside gas chamber volume of corrugated tube and changes thereby drive, and produces corresponding pressure, the pressure reduction variation thereupon.
Claims (1)
1. Gas-pressure defining device, has mechanical counter, the housing that contains air chamber, it is characterized in that housing (5) the inner chamber middle and lower part that constitutes air chamber 2 (14) is provided with the corrugated tube shape air chamber 1 (13) that the end is connected in end opening and the housing, housing (5) lower cover have the malleation valve (12) that communicates with air chamber 1 and air chamber 2 and negative pressure valve (11: corrugated air chamber 1 small corrugated pipe that is connected suitable for reading (7) middle part be have internal thread and outside the nut (6) of gathering sill, the nut (8) of isolating with air chamber 1 is housed, the fastening mechanical counter (1) that places on the limited cover (2) of screw rod (3) tail end of nut (6) upper end spinning in nut (6) lower end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94231571 CN2224413Y (en) | 1994-12-21 | 1994-12-21 | Gas-pressure defining device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94231571 CN2224413Y (en) | 1994-12-21 | 1994-12-21 | Gas-pressure defining device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2224413Y true CN2224413Y (en) | 1996-04-10 |
Family
ID=33843384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94231571 Expired - Fee Related CN2224413Y (en) | 1994-12-21 | 1994-12-21 | Gas-pressure defining device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2224413Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102853959A (en) * | 2012-10-12 | 2013-01-02 | 南阳正通防爆电气有限公司 | Pneumatic low-pressure sensor |
| CN104101461A (en) * | 2014-06-05 | 2014-10-15 | 珠海市运泰利自动化设备有限公司 | Pressure sensor negative pressure simulation test device |
| CN108049979A (en) * | 2017-11-17 | 2018-05-18 | 广州柴油机厂股份有限公司 | It is a kind of can stepless voltage regulation air pressure diesel engine side manipulate valuator |
-
1994
- 1994-12-21 CN CN 94231571 patent/CN2224413Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102853959A (en) * | 2012-10-12 | 2013-01-02 | 南阳正通防爆电气有限公司 | Pneumatic low-pressure sensor |
| CN104101461A (en) * | 2014-06-05 | 2014-10-15 | 珠海市运泰利自动化设备有限公司 | Pressure sensor negative pressure simulation test device |
| CN104101461B (en) * | 2014-06-05 | 2016-05-04 | 珠海市运泰利自动化设备有限公司 | Pressure sensor negative pressure simulation test equipment |
| CN108049979A (en) * | 2017-11-17 | 2018-05-18 | 广州柴油机厂股份有限公司 | It is a kind of can stepless voltage regulation air pressure diesel engine side manipulate valuator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |