CN201060087Y - Self-checking unit of leakage testing machine - Google Patents

Self-checking unit of leakage testing machine Download PDF

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Publication number
CN201060087Y
CN201060087Y CNU2007200723862U CN200720072386U CN201060087Y CN 201060087 Y CN201060087 Y CN 201060087Y CN U2007200723862 U CNU2007200723862 U CN U2007200723862U CN 200720072386 U CN200720072386 U CN 200720072386U CN 201060087 Y CN201060087 Y CN 201060087Y
Authority
CN
China
Prior art keywords
self
leak
electromagnetic valve
solenoid valve
checking unit
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 - Lifetime
Application number
CNU2007200723862U
Other languages
Chinese (zh)
Inventor
朱鸣
童伟文
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BWI Shanghai Co Ltd
Original Assignee
DE'ERFU SHANGHAI AUTOMOBILE STEERING CHASSIS SYSTEM Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by DE'ERFU SHANGHAI AUTOMOBILE STEERING CHASSIS SYSTEM Co Ltd filed Critical DE'ERFU SHANGHAI AUTOMOBILE STEERING CHASSIS SYSTEM Co Ltd
Priority to CNU2007200723862U priority Critical patent/CN201060087Y/en
Application granted granted Critical
Publication of CN201060087Y publication Critical patent/CN201060087Y/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model relates to a self-checking device of a leakage measuring machine, which belongs to the technical field of the detection of the industrial parts leakage. The utility model is characterized in that the self-checking device is composed of three two-position three-port electromagnetic valves, a pressure sensor and a standard leak, and the utility model is formed by connection modes as follows: an air power is connected with a P end which controls an inlet electromagnetic valve and an exhaust electromagnetic valve, and the A end is connected with an A end of an isolated electromagnetic valve; a R end of the isolated electromagnetic valve is connected with an air inlet end of a tested work piece and a P end which controls a leak electromagnetic valve, and the R end of the isolated electromagnetic valve is connected with the pressure sensor 4; the A end which controls the leak electromagnetic valve is connected with a standard leak piece. The positives effects after the utility model is implemented is that a property measuring machine possesses the function of self-examination, reflects whether a system is in a normal state immediately after operation and resists risk. The self-examination function has the advantages of very concision, easy operation, low cost and flexible use, which is a good helper on an industrial production line.

Description

The self-checking unit of leak-testing machine
Technical field
The detection technique field that belongs to industrial part exactly is a kind of detection technique that industrial part leaks that relates to.
Background technology
Existing leak-testing machine equipment does not usually possess self-situation audit function, if equipment operation is nonserviceabled down, and can not in time find, then can cause the test result mistake, bring serious consequence: problematic part to be tested can be used as qualified part and go to use, perhaps qualified part be made waste product and handled; The test machine that has uses special workpiece or measurer to come detection system, but this class workpiece cost of manufacture height, and can only use at specific anchor clamps, do not possess versatility, and need regularly deliver check, troublesome poeration, time-consuming.
Summary of the invention
It is a kind of simple to operate that the utility model provides, and cost of manufacture is not high, the neither time-consuming self-checking unit that can reliably examine a kind of leak-testing machine of other test macro situation again.
The technical scheme that the present invention takes:
The self-checking unit of leak-testing machine, comprise the leak-testing machine, 23 three-way electromagnetic valves, pressure transducer, the PLC controller of snorkel for connection and control electromagnetic valve, its scheme is: also have a self-checking unit that leaks situation, this self-checking unit is by three 23 three-way electromagnetic valves, pressure transducer and referance leak are formed, and be made of following connected mode: source of the gas advances with control, the P end of exhaust solenoid valve connects, its A end is connected with the A end of isolation solenoid valve, the R end of isolation solenoid valve is connected with the P end of tested workpiece inlet end with control small opening solenoid valve, and join with pressure transducer 4, A end of its control small opening solenoid valve joins with referance leak spare.
Good effect behind enforcement the utility model is:
The performance test facility have been equipped with the self-examination function, can reflect immediately after operation that whether system is in normal condition, has resisted risk.And this self-checking function is very succinct, and is easy to operate, and cost is low, use flexibly, and be the good assistant on the industrial production line.
Description of drawings
Fig. 1 is the utility model structural principle synoptic diagram
Embodiment
Now the invention will be further described in conjunction with the accompanying drawings
The self-checking unit of leak-testing machine, comprise the leak-testing machine, 23 three-way electromagnetic valves, pressure transducer, the PLC controller of snorkel for connection and control electromagnetic valve, its structure is: also have a self-checking unit that leaks situation, this self-checking unit is by three 23 three-way electromagnetic valves, pressure transducer and referance leak are formed, and be made of following connected mode: source of the gas 1 advances with control, the P end of exhaust solenoid valve 2 connects, its A end is connected with the A end of isolation solenoid valve 3, the R end of isolation solenoid valve is connected with the P end of tested workpiece 7 inlet ends with control small opening solenoid valve 6, and join with pressure transducer 4, A end of its control small opening solenoid valve 6 joins with referance leak spare 5.Described 23 three-way electromagnetic valves are that solenoid valve is P getting under the electricity condition, and the A two ends communicate.
Embodiment one:
Test part is under 550kPa, and it is unacceptable product that the leakage rate of per minute surpasses 5ccm.
Normal testing process is as follows:
1, it is electric that the PLC control signal gets solenoid valve 2, and P is communicated with the A end, and the pressurized air of 550kPa enters from source of the gas, and total system pipeline and workpiece inside pressure everywhere all are 550kPa;
2, it is electric that the PLC control signal gets solenoid valve 3, and P is communicated with the A end, and with workpiece, the test pipeline is isolated from the outside;
3, after stable after a while, if the reading of pressure transducer is lower than 500kPa (leakage flow of 5ccm can make at this section and test air pressure in the pipeline about 50kPa that descends stabilization time later), then this workpiece is considered to unacceptable product.
Embodiment two:
It is as follows to carry out the self-checking process:
1, the operator at first puts into " the qualified workpiece " of a self check special use, and it is by the very little workpiece of the leakage rate that obtains in the daily production;
2, system carries out once normal leak-testing automatically then, if the result of leak-testing is qualified (greater than 500kPa), can think that then relevant inflation solenoid valve 2 is working properly with isolation solenoid valve 3.
3, then the PLC control signal make solenoid valve 6 electric, P is communicated with the A end, with the small opening of 6ccm@550kPa and after testing pipeline connection, carries out leak-testing once more.If the reading as a result of leak-testing is lower than 500kPa, but (leakage flow of 6ccm can make and test air pressure in the pipeline about 60kPa that descends in this section stabilization time later to be higher than 450kPa, in the leakage that adds workpiece itself, therefore draw this target interval of 450~500kPa), can think that then relevant each sensor and small opening operation valve is working properly.
4, after these 2 self-checkings all pass through, can think that then each element of system is working properly.

Claims (2)

1. the self-checking unit of leak-testing machine, comprise the leak-testing machine, 23 three-way electromagnetic valves, pressure transducer, the PLC controller of snorkel for connection and control electromagnetic valve, it is characterized in that: also have a self-checking unit that leaks situation, this self-checking unit is by three 23 three-way electromagnetic valves, pressure transducer and referance leak are formed, and be made of following connected mode: source of the gas (1) advances with control, the P end of exhaust solenoid valve (2) connects, its A end is connected with the A end of isolation solenoid valve (3), the R end of isolation solenoid valve is connected with the P end of tested workpiece (7) inlet end and control small opening solenoid valve (6), the R end of its isolation solenoid valve (3) also joins with pressure transducer (4), and the A end of control small opening solenoid valve (6) joins with referance leak spare (5).
2. the self-checking unit of leak-testing machine according to claim 1 is characterized in that: described 23 three-way electromagnetic valves are that solenoid valve is P getting under the electricity condition, and the A two ends communicate.
CNU2007200723862U 2007-07-12 2007-07-12 Self-checking unit of leakage testing machine Expired - Lifetime CN201060087Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2007200723862U CN201060087Y (en) 2007-07-12 2007-07-12 Self-checking unit of leakage testing machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2007200723862U CN201060087Y (en) 2007-07-12 2007-07-12 Self-checking unit of leakage testing machine

Publications (1)

Publication Number Publication Date
CN201060087Y true CN201060087Y (en) 2008-05-14

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CNU2007200723862U Expired - Lifetime CN201060087Y (en) 2007-07-12 2007-07-12 Self-checking unit of leakage testing machine

Country Status (1)

Country Link
CN (1) CN201060087Y (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140216451A1 (en) * 2011-09-13 2014-08-07 Koninklijke Philips N.V. Pressure based gas leak testing
WO2016172115A1 (en) * 2015-04-20 2016-10-27 Nexmatix Llc System and method for leakage detection using a directional control valve
CN106595960A (en) * 2016-12-29 2017-04-26 广东鸿图科技股份有限公司 Test method of accuracy and stability of differential pressure leakage detection equipment
CN106872119A (en) * 2015-12-12 2017-06-20 中国科学院大连化学物理研究所 Continue the self checking method of organic pollution device sealing in collection incineration flue gas

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140216451A1 (en) * 2011-09-13 2014-08-07 Koninklijke Philips N.V. Pressure based gas leak testing
US9855395B2 (en) * 2011-09-13 2018-01-02 Koninklijke Philips N.V. Pressure based gas leak testing
WO2016172115A1 (en) * 2015-04-20 2016-10-27 Nexmatix Llc System and method for leakage detection using a directional control valve
CN106872119A (en) * 2015-12-12 2017-06-20 中国科学院大连化学物理研究所 Continue the self checking method of organic pollution device sealing in collection incineration flue gas
CN106872119B (en) * 2015-12-12 2018-10-26 中国科学院大连化学物理研究所 Acquire the self checking method for continuing organic pollution device leakproofness in incineration flue gas
CN106595960A (en) * 2016-12-29 2017-04-26 广东鸿图科技股份有限公司 Test method of accuracy and stability of differential pressure leakage detection equipment

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
ASS Succession or assignment of patent right

Owner name: JINGXI HEAVY INDUSTRY( SHANGHAI ) CO., LTD.

Free format text: FORMER OWNER: DELPHI SHANGHAI DYNAMICS AND PROPULSION SYSTEMS CO., LTD.

Effective date: 20091218

C41 Transfer of patent application or patent right or utility model
TR01 Transfer of patent right

Effective date of registration: 20091218

Address after: Shanghai Huajing Pudong Waigaoqiao Free Trade Zone No. 328, zip code: 200131

Patentee after: BWI (Shanghai) Co., Ltd.

Address before: Shanghai Huajing Pudong Waigaoqiao Free Trade Zone No. 328, zip code: 200131

Patentee before: De'erfu Shanghai Automobile Steering Chassis System Co., Ltd.

CX01 Expiry of patent term

Granted publication date: 20080514

CX01 Expiry of patent term