CN202119595U - Calibration apparatus of positive pressure leak for air tightness detecting instrument - Google Patents
Calibration apparatus of positive pressure leak for air tightness detecting instrument Download PDFInfo
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- CN202119595U CN202119595U CN2011201954184U CN201120195418U CN202119595U CN 202119595 U CN202119595 U CN 202119595U CN 2011201954184 U CN2011201954184 U CN 2011201954184U CN 201120195418 U CN201120195418 U CN 201120195418U CN 202119595 U CN202119595 U CN 202119595U
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Abstract
The utility model discloses a calibration apparatus of positive pressure leak for an air tightness detecting instrument, comprising a testing air source channel, a driving air source channel and an electronic control and display device, wherein the testing air source channel includes a testing channel and a reference channel; a variable-capacity chamber of the testing channel is provided with a piston which is driven by a slide; the testing air source channel and the reference channel before the variable-capacity chamber and a reference chamber are respectively connected with an air-operated valve AV2 and a differential pressure pickup in parallel; the driving air source channel includes a driving air source, an magnetic valve SV1, an magnetic valve SV2, an magnetic valve SV3 and an magnetic valve SV4; and the electronic control and display device is respectively connected with the differential pressure pickup, a temperature sensor and four magnetic valves through a conducting wire. The calibration apparatus of positive pressure leak for an air tightness detecting instrument provided by the utility model has the advantages that: the calibration apparatus of positive pressure leak uses a high-precision differential pressure pickup, a high-precision temperature sensor and a high-precision slide for realizing automatic testing; the structure of the apparatus is simple and is easy to operate; the human-computer interface is friendly so that the testing efficiency and the testing precision are improved; and a reliable detecting apparatus is provided for calibrating positive pressure leak.
Description
Technical field
The utility model relates to the means for correcting of air-leakage detector device, particularly a kind of positive pressure leak hole means for correcting that is used for the air-leakage detector device.
Background technology
In the production of air-leakage detector device is proofreaied and correct; Quantitative property requirement to positive pressure leakage-detecting method is increasingly high; To proofread and correct positive pressure leak hole exactly accurately and solve malleation one of the quantitative property key of problem of hunting leak; Traditional bearing calibration is to be directed against vacuum leak mostly, and the correction of positive pressure leak hole also has many researchs both at home and abroad.Along with the continuous promotion and application of leak hunting technology in commercial production; The application of malleation leak detection is also constantly being widened, so the application of positive pressure leak hole is also more and more, requires increasingly high; But the positive pressure leak hole bearing calibration relatively lags behind with device; The existing method of testing general test time is longer, and measuring accuracy is not high, and the influence of tested person environment is bigger.On the basis of having studied domestic and international various small opening means for correctings, proposed a kind of small opening means for correcting, realized the correction fast and accurately of positive pressure leak hole based on constant voltage transfiguration principle.
Summary of the invention
The purpose of the utility model is to above-mentioned existing problems, and a kind of positive pressure leak hole means for correcting that is used for the air-leakage detector device is provided, and this means for correcting adopts constant voltage transfiguration principle, has realized the correction fast and accurately of positive pressure leak hole.
The technical scheme of the utility model:
A kind of positive pressure leak hole means for correcting that is used for the air-leakage detector device; By test source of the gas pipeline, drive the source of the gas pipeline and automatically controlled and display device constitutes; Test source of the gas pipeline comprises the test pipeline and with reference to pipeline, the test pipeline comprises that test air source inlet, Pneumatic valve AV3, tested small opening and transfiguration chamber also are connected through pipeline, are provided with Pneumatic valve AV4 on the pipeline between Pneumatic valve AV3 and the tested small opening; The indoor piston that is provided with of transfiguration; Piston is driven by slide unit, and slide unit is made up of single shaft driver and stepper motor, and the indoor piston of transfiguration is connected with the driving shaft of slide unit through leading screw; Comprise that with reference to pipeline Pneumatic valve AV1 also is connected through pipeline with reference chamber, respectively through pipeline parallel connection Pneumatic valve AV2 and differential pressure sensing 7 devices, test source of the gas pipeline is provided with temperature sensor before the transfiguration chamber and on the gas piping before the reference chamber; Driving the source of the gas pipeline comprises and drives air source inlet and solenoid valve SV1, SV2, SV3, SV4; Drive source of the gas and be connected with the air intake opening of solenoid valve SV1, SV2, SV3, SV4 respectively through pipeline, the working hole of solenoid valve SV1, SV2, SV3, SV4 is connected with the gas control mouth of Pneumatic valve AV1, AV2, AV3, AV4 respectively through gas piping; Automatically controlled and display device is provided with electric control gear and also is connected with differential pressure pick-up, temperature sensor and solenoid valve SV1, SV2, SV3, SV4 respectively through lead with display device.
The utility model has the advantages that: this positive pressure leak hole means for correcting adopts high precision differential pressure pick-up, temperature sensors of high precision and high precision slide unit, has realized automatic test; This apparatus structure is simple, easy to implement, and man-machine interface is friendly, has improved testing efficiency and measuring accuracy, has got rid of the human factor influence, for the correction of positive pressure leak hole provides a kind of reliable detection device.
Description of drawings
Accompanying drawing is this positive pressure leak hole means for correcting structural representation, and among the figure: solid line is that gas circuit connects, and dotted line is that circuit connects.
Embodiment
Embodiment:
A kind of positive pressure leak hole means for correcting that is used for the air-leakage detector device; Shown in accompanying drawing, by test source of the gas pipeline, drive the source of the gas pipeline and automatically controlled and display device constitutes, test source of the gas pipeline comprises the test pipeline and with reference to pipeline; The test pipeline comprises that test air source inlet, Pneumatic valve AV3, tested small opening and transfiguration chamber also are connected through pipeline; On the pipeline between Pneumatic valve AV3 and the tested small opening, be provided with Pneumatic valve AV4, the indoor piston that is provided with of transfiguration, piston is driven by slide unit; Slide unit is made up of single shaft driver and stepper motor, and the indoor piston of transfiguration is connected with the driving shaft of slide unit through leading screw; Comprise that with reference to pipeline Pneumatic valve AV1 also is connected through pipeline with reference chamber, respectively through pipeline parallel connection Pneumatic valve AV2 and differential pressure pick-up, test source of the gas pipeline is provided with temperature sensor before the transfiguration chamber and on the gas piping before the reference chamber; Driving the source of the gas pipeline comprises and drives air source inlet and solenoid valve SV1, SV2, SV3, SV4; Drive source of the gas and be connected with the air intake opening of solenoid valve SV1, SV2, SV3, SV4 respectively through pipeline, the working hole of solenoid valve SV1, SV2, SV3, SV4 is connected with the gas control mouth of Pneumatic valve AV1, AV2, AV3, AV4 respectively through gas piping; Automatically controlled and display device is provided with electric control gear and also is connected with differential pressure pick-up, temperature sensor and solenoid valve SV1, SV2, SV3, SV4 respectively through lead with display device.
In this embodiment, the gas piping diameter is 1.5mm; The MAV18A-12-NO product that Pneumatic valve AV1, AV2, AV3, AV4 select for use Japanese FUKUDA company to produce; Solenoid valve SV1, SV2, SV3, SV4 is the two-bit triplet solenoid valve, the VQ110 product of selecting for use SMC company to produce; The VR55 product that differential pressure pick-up selects for use Japanese FUKUDA company to produce; The single shaft driver LX2001C-B1-T2042-150 that slide unit selects for use MISUMI company to produce, stroke 86.5mm, bearing accuracy 0.06mm; Bearing accuracy ± 0.005mm repeatedly; The stepper motor PK244-04A that produces with east motor company drives, and the leading screw helical pitch is 1mm, and diameter is 6mm; The PT100 product that temperature sensor selects for use Tianjin Li Wen company to produce; Automatically controlled and display device is selected the automatically controlled and display device FC-80 of the positive pressure leak hole caliberating device of rich benefit (Tianjin) pneumatics Research Institute for use; The transfiguration chamber is the airtight chamber that has piston of internal diameter 0.8mm, length 100mm; Reference chamber is the confined gas chamber of internal diameter 2mm, length 100mm.
The concrete test process of this embodiment is following:
The driving bleed pressure is 400kPa, and the test bleed pressure is 200kPa, through automatically controlled and display device time and pressure parameter is set.
Tested small opening is inserted gas circuit, and automatically controlled and display device control slide unit moves on to the left side with the piston of transfiguration chamber, closes Pneumatic valve AV1, and time-delay 10s closes Pneumatic valve AV2 then, the 10s that delays time again, and automatically controlled and display device is with the differential pressure pick-up zero clearing.Begin test: open Pneumatic valve AV3 and automatically controlled and display device and pick up counting, transfiguration chamber wall pressure can slowly raise.Automatically controlled and display device can detect this pressure through differential pressure pick-up, and when pressure surpassed 20Pa, the piston that automatically controlled and display device control slide unit drives the transfiguration chamber moved right, when pressure is lower than-slide unit stop motion during 20Pa.When the reading of differential pressure pick-up is zero, stop timing and close Pneumatic valve AV3 and open Pneumatic valve AV2, AV1 and AV4, take off tested small opening.This moment, automatically controlled and display device write down the whole move distance of piston, promptly when the differential pressure pick-up reading be zero time institute's elapsed time, the leak rate that promptly can calculate tested small opening according to the volume of piston motion and time then.
Computing method:
Atmospheric pressure: P
0=1.01325 * 10
5Pa;
Piston diameter: d=0.8mm;
The distance of piston motion is s=30mm in the test process, Δ t=694.8s during tester
According to formula
Calculating the leak rate of this small opening when test is pressed to 200kPa is Q=2.20 * 10
-6Pam
3/ s
This means for correcting adopts constant voltage transfiguration principle, has realized the correction fast and accurately of positive pressure leak hole, is particularly suitable for the leak rate scope 10
-5～10
-8Pam
3The positive pressure leak hole of/s is proofreaied and correct.
Claims (1)
1. positive pressure leak hole means for correcting that is used for the air-leakage detector device; It is characterized in that: by test source of the gas pipeline, drive the source of the gas pipeline and automatically controlled and display device constitutes; Test source of the gas pipeline comprises the test pipeline and with reference to pipeline, the test pipeline comprises that test air source inlet, Pneumatic valve AV3, tested small opening and transfiguration chamber also are connected through pipeline, are provided with Pneumatic valve AV4 on the pipeline between Pneumatic valve AV3 and the tested small opening; The indoor piston that is provided with of transfiguration; Piston is driven by slide unit, and slide unit is made up of single shaft driver and stepper motor, and the indoor piston of transfiguration is connected with the driving shaft of slide unit through leading screw; Comprise that with reference to pipeline Pneumatic valve AV1 also is connected through pipeline with reference chamber, respectively through pipeline parallel connection Pneumatic valve AV2 and differential pressure pick-up, test source of the gas pipeline is provided with temperature sensor before the transfiguration chamber and on the gas piping before the reference chamber; Driving the source of the gas pipeline comprises and drives air source inlet and solenoid valve SV1, SV2, SV3, SV4; Drive source of the gas and be connected with the air intake opening of solenoid valve SV1, SV2, SV3, SV4 respectively through pipeline, the working hole of solenoid valve SV1, SV2, SV3, SV4 is connected with the gas control mouth of Pneumatic valve AV1, AV2, AV3, AV4 respectively through gas piping; Automatically controlled and display device is provided with electric control gear and also is connected with differential pressure pick-up, temperature sensor and solenoid valve SV1, SV2, SV3, SV4 respectively through lead with display device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201954184U CN202119595U (en) | 2011-06-10 | 2011-06-10 | Calibration apparatus of positive pressure leak for air tightness detecting instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201954184U CN202119595U (en) | 2011-06-10 | 2011-06-10 | Calibration apparatus of positive pressure leak for air tightness detecting instrument |
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| Publication Number | Publication Date |
|---|---|
| CN202119595U true CN202119595U (en) | 2012-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201954184U Expired - Lifetime CN202119595U (en) | 2011-06-10 | 2011-06-10 | Calibration apparatus of positive pressure leak for air tightness detecting instrument |
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| Country | Link |
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| CN (1) | CN202119595U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215394A (en) * | 2014-09-12 | 2014-12-17 | 天津博益气动股份有限公司 | Device and method for detecting sensing coefficient of differential pressure sensor by utilizing leaking hole |
| CN104964792A (en) * | 2015-07-14 | 2015-10-07 | 天津博益气动股份有限公司 | Differential pressure sensor static performance detection device |
| CN105606318A (en) * | 2015-11-26 | 2016-05-25 | 上海市计量测试技术研究院 | Calibration method and device of airtight leak detector |
| CN111579155A (en) * | 2020-06-18 | 2020-08-25 | 北京迈世高科电子技术有限公司 | Airtight appearance inspection frock |
-
2011
- 2011-06-10 CN CN2011201954184U patent/CN202119595U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215394A (en) * | 2014-09-12 | 2014-12-17 | 天津博益气动股份有限公司 | Device and method for detecting sensing coefficient of differential pressure sensor by utilizing leaking hole |
| CN104964792A (en) * | 2015-07-14 | 2015-10-07 | 天津博益气动股份有限公司 | Differential pressure sensor static performance detection device |
| CN105606318A (en) * | 2015-11-26 | 2016-05-25 | 上海市计量测试技术研究院 | Calibration method and device of airtight leak detector |
| CN111579155A (en) * | 2020-06-18 | 2020-08-25 | 北京迈世高科电子技术有限公司 | Airtight appearance inspection frock |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: TIANJIN BOYI PNEUMATIC TECHNOLOGY INSTITUTE CO., L Free format text: FORMER NAME: BOYI (TIANJIN) PNEUMATIC TECHNOLOGY INST. CO. LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 300457 in Tianjin Binhai Dongying District B-704 Patentee after: BOYI (TIANJIN) PNEUMATIC TECHNOLOGY INSTITUTE CO., LTD. Address before: 300457 in Tianjin Binhai Dongying District B-704 Patentee before: Boyi (Tianjin) Pneumatic Technology Inst. Co. Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20120118 |
|
| CX01 | Expiry of patent term |