CN112033616A - Differential pressure type gas circuit detection mechanism - Google Patents
Differential pressure type gas circuit detection mechanism Download PDFInfo
- Publication number
- CN112033616A CN112033616A CN202010991969.5A CN202010991969A CN112033616A CN 112033616 A CN112033616 A CN 112033616A CN 202010991969 A CN202010991969 A CN 202010991969A CN 112033616 A CN112033616 A CN 112033616A
- Authority
- CN
- China
- Prior art keywords
- differential pressure
- pressure sensor
- valve
- reference chamber
- air inlet
- 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.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
A differential pressure type gas circuit detection mechanism is matched with a gas circuit structure with a reference cavity in a differential pressure detection mode, and high-precision detection of the gas tightness of a detected object is achieved. By adopting the chamber structure, a workpiece with qualified quality does not need to be prepared in advance as a reference, and the workpiece to be tested is directly connected into the test port. The three electromagnetic valves are used for controlling the gas flow to pressurize the chamber, whether the workpiece to be detected is qualified or not is judged according to the signal output by the high-precision differential pressure sensor within a specified time, the gas circuit mechanism can realize high-precision gas tightness detection, and the gas circuit mechanism is simple in structure and simple and easy to operate.
Description
Technical Field
The invention relates to the field of air tightness detection, is simple to operate, practical and convenient, and particularly can better realize high-precision air tightness detection.
Background
The differential pressure type detection air tightness is used for detecting the air tightness of a product, and the design and detection links are more, so that larger detection errors can be brought; the sealing effect of the connecting part is difficult to ensure because the connecting part of the gas circuit is too much; the standard component is not standard or is not stable to bring errors, and the high-precision detection can not be well guaranteed.
Disclosure of Invention
In view of the above background, the present invention provides an air path chamber for improving detection accuracy of air tightness detection.
In order to solve the technical problem, the gas circuit provided by the invention comprises a gas circuit chamber, a reference chamber and a gas circuit, wherein the gas circuit chamber is used for ensuring a good detection effect during gas tightness detection; the gas path chamber ensures that the gas flow direction can inflate and pressurize each position according to a preset mode; the reference chamber can pressurize the tested piece and also can pressurize the reference chamber, and errors caused by temperature, compression deformation and the like can be eliminated.
The differential pressure type gas circuit detection mechanism comprises a gas circuit mechanism and a reference chamber; the device is characterized in that the gas path mechanism consists of an air inlet valve, a pressure sensor, a high-precision differential pressure sensor, a balance valve, a pressure relief valve and a silencer, and the trend of pressurized gas flow is designed to pressurize each position in a preset mode; the reference chamber is connected with the gas circuit mechanism, the reference chamber can be pressurized when the tested piece is pressurized, and errors caused by temperature, compression deformation and the like can be eliminated.
The differential pressure type gas circuit detection mechanism further comprises a gas inlet valve, a gas inlet pressure sensor, a high-precision differential pressure sensor, a balance valve, a reference chamber, a pressure release valve, a silencer and a detection interface. The air outlet end of the air inlet valve is connected with an air inlet pressure sensor through a stainless steel three-way quick-screwing joint, and the P1 port of the high-precision differential pressure sensor is connected with the air inlet pressure sensor and the end A of the reference chamber through the stainless steel three-way quick-screwing joint; the port P2 is connected with the balance valve and the detection interface through a stainless steel three-way quick-screwing joint. One end of the balance valve is connected with the B end of the reference chamber and a port of a differential pressure sensor P2. The end A of the reference chamber is connected with a port P1 of a differential pressure sensor, an air inlet pressure sensor and an air outlet end of an air inlet valve; the end B of the reference chamber is connected with a balance valve; the end C of the reference chamber is connected with a pressure relief valve. One end of the balance valve is connected with the end C of the reference chamber, and the other end of the balance valve is connected with the silencer.
A differential pressure type detection gas circuit mechanism, its characterized in that: the air inlet valve, the air inlet pressure sensor, the high-precision differential pressure sensor, the balance valve, the reference chamber, the pressure release valve, the silencer and the detection interface are all connected through threaded joints to ensure that leakage does not exist absolutely.
A gas circuit structure with a reference cavity is matched in a mode of adopting differential pressure detection, and high-precision detection of the air tightness of a detected object is achieved. By adopting the chamber structure, a workpiece with qualified quality does not need to be prepared in advance as a reference, and the workpiece to be tested is directly connected into the test port. The three electromagnetic valves are used for controlling the gas flow to pressurize the chamber, and whether the workpiece to be detected is qualified or not is judged according to a signal output by the high-precision differential pressure sensor within a specified time. The gas circuit mechanism can realize high-precision gas tightness detection, and has the advantages of simple structure and simple and easy operation method.
Drawings
Fig. 1 is a schematic diagram of a differential pressure type gas path detection mechanism of the invention.
Wherein the reference numerals are as follows: 1. the air inlet battery valve 2, the air inlet pressure sensor 3, the high-precision differential pressure sensor 4, the reference chamber 5, the balance valve 6, the pressure release valve 7, the silencer 8 and the detection interface.
Detailed Description
For further explanation of the principles and construction of the present invention, reference will now be made in detail to the present invention, examples of which are illustrated in the accompanying drawings.
Referring to fig. 1, the present invention provides a differential pressure type gas path detection mechanism, which mainly includes a gas path mechanism and a reference chamber.
The invention mainly designs a differential pressure detection gas circuit structure, which is characterized in that the gas tightness detection comprises the following steps: firstly, a tested workpiece is connected at the detection interface 8, and secondly, the pressure release valve 6 is closed, the air inlet valve 1 and the balance valve 5 are opened, so that the whole cavity and the air path are filled with air flow. Thirdly, after the 2 intake pressure sensor reaches a preset value, immediately closing the 1 intake valve and then closing the 5 balance valve, fourthly, recording the 3 differential pressure sensor signal value1 at the moment, fifthly, keeping the state for a specified time, and reading the 3 differential pressure sensor signal value 2. And sixthly, comparing the difference value between the first signal value1 and the second signal value2, if the difference value is within a preset range, indicating that the air tightness detection of the workpiece is qualified, and otherwise, failing. And seventhly, opening 5 the balance valve, opening 6 the pressure relief valve for pressure relief, and enabling the gas to flow out of the silencer.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures made by using the contents of the present specification and the drawings are included in the scope of the present invention.
Claims (3)
1. A differential pressure type detection gas circuit mechanism comprises a gas circuit mechanism and a reference chamber; the device is characterized in that the gas path mechanism consists of an air inlet valve, a pressure sensor, a high-precision differential pressure sensor, a balance valve, a pressure relief valve and a silencer, and the trend of pressurized gas flow is designed to pressurize each position in a preset mode; the reference chamber is connected with the gas circuit mechanism, the reference chamber can be pressurized when the tested piece is pressurized, and errors caused by temperature, compression deformation and the like can be eliminated.
2. The differential pressure type detection air path mechanism according to claim 1, characterized in that: the device also comprises an air inlet valve, an air inlet pressure sensor, a high-precision differential pressure sensor, a balance valve, a reference chamber, a pressure relief valve, a silencer and a detection interface;
the air outlet end of the air inlet valve is connected with an air inlet pressure sensor through a stainless steel three-way quick-screwing joint, and the P1 port of the high-precision differential pressure sensor is connected with the air inlet pressure sensor and the end A of the reference chamber through the stainless steel three-way quick-screwing joint; the port P2 is connected with the balance valve and the detection interface through a stainless steel three-way quick-screwing joint;
one end of the balance valve is connected with the B end of the reference chamber and a port P2 of the differential pressure sensor;
the end A of the reference chamber is connected with a port P1 of a differential pressure sensor, an air inlet pressure sensor and an air outlet end of an air inlet valve; the end B of the reference chamber is connected with a balance valve; the end C of the reference chamber is connected with a pressure release valve;
one end of the balance valve is connected with the end C of the reference chamber, and the other end of the balance valve is connected with the silencer.
3. The differential pressure type detection air path mechanism according to claim 2, characterized in that: the air inlet valve, the air inlet pressure sensor, the high-precision differential pressure sensor, the balance valve, the reference chamber, the pressure release valve, the silencer and the detection interface are all connected through threaded joints to ensure that leakage does not exist absolutely.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010991969.5A CN112033616A (en) | 2020-09-21 | 2020-09-21 | Differential pressure type gas circuit detection mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010991969.5A CN112033616A (en) | 2020-09-21 | 2020-09-21 | Differential pressure type gas circuit detection mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112033616A true CN112033616A (en) | 2020-12-04 |
Family
ID=73574109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010991969.5A Pending CN112033616A (en) | 2020-09-21 | 2020-09-21 | Differential pressure type gas circuit detection mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112033616A (en) |
-
2020
- 2020-09-21 CN CN202010991969.5A patent/CN112033616A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201532292U (en) | Pneumatic circuit of multifunctional gas-tightness detector | |
| US6348869B1 (en) | Pipe leak detection | |
| CN208239037U (en) | A kind of valve seal device for detecting performance | |
| CN103308254A (en) | Dry test method and dry test device for testing leak tightness of oil cooler | |
| WO2021114209A1 (en) | System and method for rapidly detecting series leakage of fuel cell stack | |
| CN113340585B (en) | General test bench of fuel cell hydrogen subsystem valve body | |
| CN204043747U (en) | Differential pressure type device for measuring volume | |
| CN203024946U (en) | Gas circuit system of air-leakage detector | |
| CN112033616A (en) | Differential pressure type gas circuit detection mechanism | |
| CN219589873U (en) | Pneumatic micro-leakage tester | |
| CN110542518B (en) | Method and equipment for testing sealing performance of adhesive assembly | |
| CN201173845Y (en) | Valve leakage test device | |
| CN110082048A (en) | A kind of detection of gas flow rate device | |
| JP3983479B2 (en) | Battery leakage inspection device | |
| CN101545823A (en) | Valve leakage test device | |
| JPH01269028A (en) | Leak testing method | |
| CN214277284U (en) | Differential pressure sensor calibration device | |
| CN115265956A (en) | Pressure system air tightness leakage detection device and method | |
| CN217440917U (en) | Leakage detection device of pneumatic actuator for valve | |
| JPH0419431B2 (en) | ||
| JP4173255B2 (en) | Air leak test device | |
| KR101439919B1 (en) | Airtight inspection apparatus | |
| CN211347267U (en) | Air tightness test system | |
| CN201397220Y (en) | Water tank dry type leak detection device | |
| CN211147972U (en) | Airtightness detection equipment for automobile shock absorber sleeve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |