CN203572622U - Gas micro leakage detection device - Google Patents

Gas micro leakage detection device Download PDF

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Publication number
CN203572622U
CN203572622U CN201320743665.2U CN201320743665U CN203572622U CN 203572622 U CN203572622 U CN 203572622U CN 201320743665 U CN201320743665 U CN 201320743665U CN 203572622 U CN203572622 U CN 203572622U
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China
Prior art keywords
interface
communicated
air
switching
transfer valve
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Active
Application number
CN201320743665.2U
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Chinese (zh)
Inventor
张胜峰
张学军
李军伟
杨帅邦
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.)
Power Polytron Technologies Inc
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Zhengzhou GL Tech Co
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Priority to CN201320743665.2U priority Critical patent/CN203572622U/en
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Abstract

The utility model discloses a gas micro leakage detection device. The gas micro leakage detection device comprises an air pump, installing seats for installing detected products, and a pressure gauge, an air outlet and an air inlet of the air pump are respectively connected with a first change-over valve and a second change-over valve via pipes, a main interface of the first change-over valve is communicated with the air outlet of the air pump, one of two switching interfaces of the first change-over valve is connected with a negative pressure air outlet, the other switching interface is communicated with airways of each interface seat, a main interface of the second change-over valve is communicated with the air inlet of the air pump, one of two switching interfaces of the second change-over valve is connected with a positive pressure air outlet, and the other switching interface is communicated with airways of each interface seat. According to the gas micro leakage detection device, the detected products arranged on the installing seats can be exhausted or inflated through the switching of the two change-over switches, positive pressure leak detection and negative pressure leak detection can both be performed, and the detected products can be guaranteed to satisfy various on-site requirements.

Description

The micro-device for detecting leakage of gas
Technical field
The utility model relates to the micro-device for detecting leakage of gas.
Background technology
For avoiding this type of product of installing on gas pipeline such as sensor because internal pipe pressure is higher than atmospheric pressure or lower than atmospheric pressure, causes the inner or outer gas of pipeline by being arranged on the equipment on pipeline, and leak.Be necessary this series products to detect in the leakage rate of setting-up time, guarantee that the overall performance of product meets design and the on-the-spot requirement of using.Leak detection apparatus as disclosed in CN 201051040Y in prior art, substantially be all the gas leakage situation that after employing vacuum pump suction generation subnormal ambient, working pressure table detects test product, because vacuum pump can only be bled and can not inflate, therefore the gas leakage that pick-up unit of the prior art mostly can only unidirectional testing product, function is comparatively single, cannot guarantee that test product can meet the requirement of various field conditions.
Utility model content
The purpose of this utility model be to provide a kind of can positive pressure leak detection again can negative pressure leak detection the micro-device for detecting leakage of gas.
The technical solution of the utility model is: the micro-device for detecting leakage of a kind of gas, comprise mount pad, the tensimeter of air pump, installation test product, the air flue that mount pad has the erection joint for connecting test product and communicates with erection joint, the outlet, inlet mouth of air pump is connected with first and second transfer valve by pipeline respectively, each transfer valve all has a main interface and two switching interfaces, and transfer valve has a switching interface and is communicated with main interface and cuts out the switching state of another switching interface and cut out the closed condition of total interface; The main interface of the first transfer valve is communicated with air pump gas outlet, and one of them of two switching interfaces of the first transfer valve is connected to negative pressure air-out mouth, another is communicated with the air flue of each interface block; The main interface of the second transfer valve is communicated with air pump air intake opening, and one of them of the second transfer valve two switching interfaces is connected to malleation air intake opening, another is communicated with the air flue of each interface block through corresponding pipeline.
Described mount pad have two above and through connecting pipe, the air flue of mount pad is serially connected, described tensimeter is connected on described connecting pipe and is communicated with the air flue of each mount pad.
Between described adjacent mount pad, be also provided with stop valve.
Described connecting pipe end is connected with blowdown valve and exhaust box.
The switching of this pick-up unit by two transfer valves being connected with the outlet, inlet mouth of air pump and can change the airflow direction of air flue in mount pad, the test product that not only can fill mount pad is bled but also can inflate it, and after set pressure, close transfer valve and carry out timing pressurize leak detection reaching, thereby can carry out positive pressure leak detection and can carry out again negative pressure leak detection, guarantee that test product can meet various field requirement.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment of the present utility model.
Embodiment
As shown in Figure 1, embodiment of the present utility model, comprises air pump 1, mount pad 2, the tensimeter 12 of test product is installed.Tensimeter 12 is digital pressure gauge, the air flue that mount pad 2 has the erection joint for connecting test product and communicates with erection joint, mount pad 2 has two above and through connecting pipe, the air flue of mount pad 2 is serially connected, and form multiple stations, tensimeter 12 is connected on described connecting pipe and is communicated with the air flue of each mount pad 2, between adjacent mount pad 2, be also provided with stop valve 7, described connecting pipe end is connected with blowdown valve 8 and exhaust box 11.
The outlet, inlet mouth of air pump 1 is connected with first and second transfer valve 3,4 by pipeline respectively, each transfer valve all has a main interface and two switching interfaces, and transfer valve has a switching interface and is communicated with main interface and cuts out the switching state of another switching interface and cut out the closed condition of total interface.The main interface of the first transfer valve 3 is communicated with air pump 1 gas outlet, and one of them of 3 liang of switching interfaces of the first transfer valve is connected to negative pressure air-out mouth 6, another is communicated with the air flue of each interface block 2 through described connecting pipe.On pipeline between air pump 1 and the second transfer valve 3, also by three-way connection 9, be connected with reduction valve 10.The main interface of the second transfer valve 4 is communicated with air pump 1 air intake opening, and one of them of 4 liang of switching interfaces of the second transfer valve is connected to malleation air intake opening 5, another is communicated with the air flue of each interface block 2 through described connecting pipe.
Above-described embodiment can carry out following negative pressure leak detection and positive pressure leak detection in use:
1, negative pressure leak detection: the apparatus installation that needs are checked is to the station of pick-up unit, be connected in the erection joint of each mount pad 2, the first transfer valve 3 is rotated to its main interface and negative pressure air-out mouth 6 connected states, the second transfer valve 4 is rotated to its main interface and each interface block 2 connected states, now air pump 1 air intake opening is connected with each interface block 2, air pump 1 gas outlet is connected with atmosphere, by each stop valve 7 in open mode, blowdown valve 8 is in closed condition, open air pump 1 power switch, air pump 1 starts pick-up unit to take out negative pressure, when the registration of digital pressure gauge shows 200kPa left and right, close air pump 1 power switch, and by first, two transfer valves 3, 4 rotate to closed condition (main interface, switching interface Close All) to prevent that air pump gas leakage from exerting an influence to the impermeability of instrument, enter packing state, 10s left and right (pressure between each cavity of balance needs the regular hour), the indicating value (P1) of recording manometer 12, and select suitable timing to touch the button, when reaching after official hour, record the now indicating value of tensimeter 12 (P2), the difference of P2 and P1 is the amount of leakage of instrument in certain hour, whether the impermeability that judges instrument according to the design standards of instrument is qualified.
After test finishes, open blowdown valve 8 pick-up unit is carried out to pressure release, when pick-up unit returns to (being that digital pressure gauge shows normal pressure) after normal pressure, just dismountable detected instrument.
2, positive pressure leak detection: the apparatus installation that needs are checked is to the station of pick-up unit, the first transfer valve 3 is rotated to its main interface and each interface block 2 connected states, the second transfer valve 4 is rotated to its main interface and malleation air intake opening 5 connected states, now air pump 1 gas outlet is connected with each interface block 2, air pump 1 air intake opening is connected with atmosphere, by each stop valve in open mode, blowdown valve is in closed condition, open air pump power switch, air pump is beaten malleation to pick-up unit, when the registration of digital pressure gauge shows 200kPa left and right, close air pump power switch, and the first transfer valve 3 is rotated to closed condition, the second transfer valve 4 rotates to closed condition (preventing that air pump gas leakage from exerting an influence to the impermeability of instrument), enter packing state, 25s left and right (pressure between each cavity of balance needs the regular hour), record the indicating value (P3) of digital pressure gauge, and select suitable timing to touch the button, when reaching after official hour, pick-up unit carries out acousto-optic hint, record the now indicating value of digital pressure gauge (P4), the difference of P4 and P3 is the amount of leakage of instrument in certain hour, whether the impermeability that judges instrument according to the design standards of instrument is qualified.
After test finishes, open blowdown valve 8, pick-up unit is carried out to pressure release, when pick-up unit returns to (being that digital pressure gauge shows normal pressure) after normal pressure, just dismountable instrument.

Claims (4)

1. the micro-device for detecting leakage of gas, comprise mount pad, the tensimeter of air pump, installation test product, it is characterized in that: the air flue that mount pad has the erection joint for connecting test product and communicates with erection joint, the outlet, inlet mouth of air pump is connected with first and second transfer valve by pipeline respectively, each transfer valve all has a main interface and two switching interfaces, and transfer valve has a switching interface and is communicated with main interface and cuts out the switching state of another switching interface and cut out the closed condition of total interface; The main interface of the first transfer valve is communicated with air pump gas outlet, and one of them of two switching interfaces of the first transfer valve is connected to negative pressure air-out mouth, another is communicated with the air flue of each interface block; The main interface of the second transfer valve is communicated with air pump air intake opening, and one of them of the second transfer valve two switching interfaces is connected to malleation air intake opening, another is communicated with the air flue of each interface block through corresponding pipeline.
2. the micro-device for detecting leakage of gas according to claim 1, is characterized in that: described mount pad have two above and through connecting pipe, the air flue of mount pad is serially connected, described tensimeter is connected on described connecting pipe and is communicated with the air flue of each mount pad.
3. the micro-device for detecting leakage of gas according to claim 2, is characterized in that: between described adjacent mount pad, be also provided with stop valve.
4. the micro-device for detecting leakage of gas according to claim 2, is characterized in that: described connecting pipe end is connected with blowdown valve and exhaust box.
CN201320743665.2U 2013-11-22 2013-11-22 Gas micro leakage detection device Active CN203572622U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320743665.2U CN203572622U (en) 2013-11-22 2013-11-22 Gas micro leakage detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320743665.2U CN203572622U (en) 2013-11-22 2013-11-22 Gas micro leakage detection device

Publications (1)

Publication Number Publication Date
CN203572622U true CN203572622U (en) 2014-04-30

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Family Applications (1)

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CN201320743665.2U Active CN203572622U (en) 2013-11-22 2013-11-22 Gas micro leakage detection device

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107505100A (en) * 2017-07-28 2017-12-22 重庆梦赛力士光电股份有限公司 A kind of telescope water proofing property device for fast detecting
CN109307574A (en) * 2018-10-31 2019-02-05 四川泛华航空仪表电器有限公司 A kind of air tightness tester

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107505100A (en) * 2017-07-28 2017-12-22 重庆梦赛力士光电股份有限公司 A kind of telescope water proofing property device for fast detecting
CN109307574A (en) * 2018-10-31 2019-02-05 四川泛华航空仪表电器有限公司 A kind of air tightness tester

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Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
CP01 Change in the name or title of a patent holder

Address after: 450001 Henan city of Zhengzhou province high tech Industrial Development Zone Long Chun Road No. 10

Patentee after: Power Polytron Technologies Inc

Address before: 450001 Henan city of Zhengzhou province high tech Industrial Development Zone Long Chun Road No. 10

Patentee before: Zhengzhou GL Tech Company

CP01 Change in the name or title of a patent holder