CN207675384U - A kind of gas flow sensor leakproofness measuring device - Google Patents
A kind of gas flow sensor leakproofness measuring device Download PDFInfo
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- CN207675384U CN207675384U CN201721863401.5U CN201721863401U CN207675384U CN 207675384 U CN207675384 U CN 207675384U CN 201721863401 U CN201721863401 U CN 201721863401U CN 207675384 U CN207675384 U CN 207675384U
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- gas flow
- flow sensor
- cushion chamber
- pressure
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Abstract
The utility model is related to a kind of gas flow sensor leakproofness measuring devices, the device includes cushion chamber, exhaust pipe and the pressure gauge for detecting buffering cavity pressure, measuring mouth, air inlet and the connector for connecting under test gas flow sensor are provided on the cushion chamber, the air inlet connects exhaust pipe, connector connects pressure gauge, cushion chamber is connected to air-source by exhaust pipe, and aspiration pump and reversal valve are disposed on the exhaust pipe from air-source to cushion chamber.The device volume is small, easy to remove, and the pressure pipeline generated independent of air compressor, applied widely；The switching at any time that reversal valve realizes positive pressure and negative pressure is set, can multi-party position measuring sensor leakproofness, measurement result is relatively reliable.
Description
Technical field
The utility model belongs to equipment detection field, and in particular to a kind of gas flow sensor leakproofness measuring device.
Background technology
Gas flow sensor is mounted in coal mine gas extraction pipeline, during gas drainage under suction
A kind of highly sophisticated device of the information measurements such as gas flow, gas flow rate, gas pressure and gas temperature will can be surveyed timely
Amount information passes to associate device, to realize the real-time monitoring to gas drainage under suction process.Transmission gas can accurately be measured
The information such as gas flow, pressure in pipeline, stringent sealing performance are the key factors that can sensor realize the function, are
Ensure that the gas flow sensor of manufacture entirely reaches sealing performance requirement, it is necessary to examine to being sealed property of gas flow sensor
It surveys.
Current gas flow sensor is to carry out installation fixation using large volume air accumulator, and produce by air compressor
Raw pressure pipeline is sealed performance measurement.But gas storage tank body is excessively heavy, it is inconvenient to carry；It is generated using air compressor
Pressure pipeline measure, cannot be satisfied the measurement demand of part Experiment room.
Utility model content
The utility model provides a kind of gas flow sensor leakproofness measuring device, is passed with solving existing air flow rate
Sensor device for detecting sealability volume is heavy, and the problem that the scope of application is small.
In order to solve the above technical problems, the gas flow sensor leakproofness measuring device of the utility model includes following two
18 unit schemes：
Unit scheme one, the device include cushion chamber, exhaust pipe and the pressure gauge for detecting buffering cavity pressure, institute
State measuring mouth, air inlet and the connector being provided on cushion chamber for connecting under test gas flow sensor, the air inlet
Exhaust pipe is connected, connector connects pressure gauge, and cushion chamber is connected to air-source by exhaust pipe, from air-source to cushion chamber
Aspiration pump and reversal valve are disposed on exhaust pipe.
Unit scheme two, on the basis of unit scheme one, which is additionally provided with for discharging letting out for buffer cavity pressure
Pressure valve.
Unit scheme three, on the basis of unit scheme two, the relief valve is arranged on an external pipeline, described outer
It takes on the pipeline that road is arranged between cushion chamber and reversal valve by the first three-way connection.
Unit scheme four, on the basis of unit scheme one, which further includes an external measurement pipeline, described external
Pipeline is measured to be connected on the pipeline between cushion chamber and reversal valve by the second three-way connection.
Unit scheme five, on the basis of unit scheme four, the external measurement pipe road is provided with shut-off valve.
Unit scheme six, on the basis of unit scheme one, the reversal valve is two-position five-way valve, two-position five-way valve one end
There are two gas port, two gas ports connect air inlet and the gas outlet of vacuum pump, and there are three gas port, the gas ports in centre position for the other end
Connect exhaust pipe.
Unit scheme seven is additionally provided with pressure retaining valve on the basis of unit scheme one between the cushion chamber and reversal valve.
Unit scheme eight, nine, ten, 11,12,13,14, respectively unit scheme one, two, three, four, five, six,
On the basis of seven, pressure-regulating valve is additionally provided at the air inlet of the aspiration pump.
Unit scheme 15,16,17,18,19,20,21, respectively in unit scheme eight, nine, ten,
On the basis of 11,12,13,14, the aspiration pump is vacuum pump.
Unit scheme 22,23,24,25,26,27,28, respectively in unit side
Case eight, nine, ten, on the basis of 11,12,13,14, the pressure gauge uses measurement accuracy for the high-accuracy of ± 1Pa
Pressure gauge.
The beneficial effects of the utility model：The gas flow sensor leakproofness measuring device of the utility model is using pumping
Pump generates corresponding pressure in cushion chamber, by observing the pressure of pressure gauge, judges the air-tightness of gas flow sensor, is somebody's turn to do
Device volume is small, easy to remove, and the pressure pipeline generated independent of air compressor, applied widely.And it is arranged
Reversal valve can realize the switching at any time of positive pressure and negative pressure, can multi-party position measuring sensor sealing performance, measurement result is more
Accurately, reliably.
Description of the drawings
Fig. 1 is a kind of gas flow sensor leakproofness measuring device block diagram of the utility model；
Fig. 2 is a kind of gas flow sensor leakproofness measuring device structure chart of the utility model；
In Fig. 1,1-1 is vacuum pump, and 1-2 is cushion chamber, and 1-3 is precision pressure gauge, and 1-4 is pressure-regulating valve, and 1-5 is to change
To valve, 1-6 is pressure retaining valve, and 1-7 is relief valve, and 1-8 is shut-off valve, and 1-9 is externally measured mouth, and 1-10 is exhaust outlet, and 1-11 is
Air inlet, 1-12 are gas outlet；
In Fig. 2,2-1 is precision pressure gauge, and 2-2 is relief valve, and 2-3 is under test gas flow sensor, and 2-4 is buffering
Chamber, 2-5 are device box, and 2-6 is screw, and 2-7 is spring washer, and 2-8 is plain washer, and 2-9 is handle, and 2-10 is adjusted for pressure
Valve, 2-11 are adapter, and 2-12 is fixed plate, and 2-13 is stabilizer blade, and 2-14 is pressure retaining valve, and 2-15 is vacuum pump, and 2-16 is switch
Power supply, 2-17 are three core power cords, and 2-18 is stainless steel waterproof connector, and 2-19 is power switch, and 2-20 is vacuum pump switch, 2-
21 be three-way connection, and 2-22 is reversal valve.
Specific implementation mode
Below in conjunction with the accompanying drawings, further details of introduction is made to the technical solution of the utility model.
As shown in Figure 1, the gas flow sensor leakproofness measuring device of the utility model includes cushion chamber, exhaust pipe
And it for detecting the pressure gauge for buffering cavity pressure, is provided on the cushion chamber for connecting under test gas flow sensor
Measuring mouth, air inlet and connector, the air inlet connect exhaust pipe, and connector connects pressure gauge, and cushion chamber passes through pumping
Pipeline connection air-source is disposed with aspiration pump and reversal valve on the exhaust pipe from air-source to cushion chamber.
After leakproofness is measured, in order to discharge the pressure of cushion chamber, therefore, which is additionally provided with one
A relief valve for being exclusively used in release buffer cavity pressure.
Measuring mouth is set up directly on cushion chamber, and cushion chamber opening excessively leads to the reliability drop that it is sealed in order to prevent
It is low, it is provided only with a measuring mouth, an air inlet and a pressure gauge for measuring buffer cavity pressure on cushion chamber and connects
Interface.The air inlet is used to be vented outward to cushion chamber air inlet or from cushion chamber, in order to realize that an air inlet can be to buffering
Chamber air inlet can will also buffer the purpose that discharge of intracavity gas, be arranged one on pipeline that can be between cushion chamber and reversal valve
A three-way connection, the three-way connection include three openings, and two of which is open for connecting air inlet pipeline and relief valve, and in addition one
The air inlet of a opening connection cushion chamber.
To realize the purpose of other instruments leakproofness measurement, can be arranged on the air inlet pipeline being connect with cushion chamber outside one
Measurement pipeline is connect, for connecting other instruments to be measured, the other end is connected by a three-way connection for the external measurement pipeline one end
Cushion chamber air inlet realizes the conducting with cushion chamber, will pass through the pressure value in pressure gauge reading pipeline.To ensure gas stream
Quantity sensor measurement is not interfere with each other with what other instruments measured, and a shut-off valve, gas flow sensing can be arranged on the pipeline
The shut-off valve is closed when device normally measures, and the shut-off valve is opened when other instruments measure.
Two-position five-way valve may be used in the reversal valve.There are 2 threaded holes in two-position five-way valve one end, with nipple and PU
Two threaded holes are connected the air inlet of vacuum pump and gas outlet, the other end by pipe respectively 3 threaded holes, centre position screw thread
Connector is connected to the air inlet pipeline of cushion chamber, and muffler is installed at both ends；By pulling the changer lever of side, it can be achieved that vacuum pumps out
Gas port is connected with cushion chamber, i.e. positive pressure environment, can also realize that air-inlet of vacuum pump is connected with cushion chamber, i.e. subnormal ambient.
When buffering cavity pressure reaches sets requirement and closes vacuum pump switch, to ensure that cushion chamber gas will not pass through pumping
Air pipe and atmosphere, there are one pressure retaining valves for setting on the pipeline between cushion chamber and reversal valve, in buffering cavity pressure
When reaching sets requirement closing vacuum pump switch, which is closed.
The speed of buffering cavity pressure variation when controlling pumping pump work for regulating valve, can be at the air inlet of aspiration pump
It is provided with pressure-regulating valve.
As shown in Fig. 2, cushion chamber, exhaust pipe, Switching Power Supply, vacuum pump, three-way connection can be encapsulated in a babinet
It is interior, by pressure gauge setting outside the enclosure in order to observe pressure value, relief valve, reversal valve, pressure-regulating valve, pressure retaining valve and other
Some valves, power switch etc. are fixed on designated position on babinet respectively, switch-mode regulation be partially toward babinet it is outer so as to
In adjusting.The component package of device together, is reduced device occupied space by the utility model, easy to remove.
Cushion chamber in above-mentioned apparatus is used for storing pressure, and vacuum pump is used for providing pressure, and pressure-regulating valve controls vacuum
The speed of cavity pressure variation is buffered when pump work, reversal valve is used for switching the input of positive pressure, negative pressure, and pressure retaining valve is used for controlling true
Sky pump buffers cavity pressure after being stopped, relief valve is for the pressure release after measuring.
The concrete operating principle of the device is：
Flow sensor to be measured is mounted on measuring mouth position at the top of cushion chamber by a, and lock nut of being popped one's head in is tightened.
B. shut-off valve, relief valve are closed, pressure retaining valve is opened, reversal valve is adjusted to " positive pressure " state.
C. engaging means power supply (220V AC), opens vacuum pump switch, and vacuum pump is started to work.
D. vacuum pump switch is closed when cavity pressure to be buffered reaches sets requirement, is then shut off pressure retaining valve, at this time device
Into packing state.
E. a period of time is observed after precision pressure gauge shows value stabilization, confirms whether sensor sealing performance conforms to
It asks.
F. relief valve pressure release is opened after measuring.
G. reversal valve is adjusted to " negative pressure " state, is measured into line sensor sealing performance according to step b~f.
Claims (10)
1. a kind of gas flow sensor leakproofness measuring device, which is characterized in that the device include cushion chamber, exhaust pipe and
For detecting the pressure gauge for buffering cavity pressure, the survey for connecting under test gas flow sensor is provided on the cushion chamber
Mouth, air inlet and connector are measured, the air inlet connects exhaust pipe, and connector connects pressure gauge, and cushion chamber passes through exhaust tube
Road is connected to air-source, and aspiration pump and reversal valve are disposed on the exhaust pipe from air-source to cushion chamber.
2. gas flow sensor leakproofness measuring device according to claim 1, which is characterized in that the device is also set up
It is useful for the relief valve of release buffer cavity pressure.
3. gas flow sensor leakproofness measuring device according to claim 2, which is characterized in that the relief valve is set
It sets on an external pipeline, the pipeline that the external pipeline is arranged by the first three-way connection between cushion chamber and reversal valve
On.
4. gas flow sensor leakproofness measuring device according to claim 1, which is characterized in that the device further includes
One external measurement pipeline, the external measurement pipeline are connected to the pipe between cushion chamber and reversal valve by the second three-way connection
On the road.
5. gas flow sensor leakproofness measuring device according to claim 4, which is characterized in that the external measurement
Shut-off valve is provided on pipeline.
6. gas flow sensor leakproofness measuring device according to claim 1, which is characterized in that the reversal valve is
Two-position five-way valve, there are two gas port, two gas ports to connect air inlet and the gas outlet of vacuum pump, the other end for two-position five-way valve one end
There are three gas port, the gas port in centre position connects exhaust pipe.
7. gas flow sensor leakproofness measuring device according to claim 1, which is characterized in that the cushion chamber with
Pressure retaining valve is additionally provided between reversal valve.
8. the gas flow sensor leakproofness measuring device according to claim 1-7 any one, which is characterized in that institute
It states and is additionally provided with pressure-regulating valve at the air inlet of aspiration pump.
9. gas flow sensor leakproofness measuring device according to claim 8, which is characterized in that the aspiration pump is
Vacuum pump.
10. gas flow sensor leakproofness measuring device according to claim 8, which is characterized in that the pressure gauge
Use measurement accuracy for the high-accuracy pressure gauge of ± 1Pa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721863401.5U CN207675384U (en) | 2017-12-27 | 2017-12-27 | A kind of gas flow sensor leakproofness measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721863401.5U CN207675384U (en) | 2017-12-27 | 2017-12-27 | A kind of gas flow sensor leakproofness measuring device |
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| Publication Number | Publication Date |
|---|---|
| CN207675384U true CN207675384U (en) | 2018-07-31 |
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ID=62971279
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| CN201721863401.5U Active CN207675384U (en) | 2017-12-27 | 2017-12-27 | A kind of gas flow sensor leakproofness measuring device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108760192A (en) * | 2018-08-28 | 2018-11-06 | 麦克传感器股份有限公司西安分公司 | A kind of portable sealed assembly detection apparatus and detection method |
| CN108759994A (en) * | 2018-08-15 | 2018-11-06 | 真兰仪表科技有限公司 | A kind of dry type gas meter, flow meter school missing inspection measurement equipment and its application method |
| CN109000863A (en) * | 2018-08-09 | 2018-12-14 | 上海航天设备制造总厂有限公司 | A kind of air tightness detection system and its detection method of SLM device molding cavity |
| 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 |
| CN109596281A (en) * | 2018-12-29 | 2019-04-09 | 广东德洛斯照明工业有限公司 | A kind of test device for air tightness and test method |
| CN110400739A (en) * | 2019-08-08 | 2019-11-01 | 北京市人工影响天气办公室 | A kind of pressure control sampling device for airborne aerosol mass spectrometer |
-
2017
- 2017-12-27 CN CN201721863401.5U patent/CN207675384U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109000863A (en) * | 2018-08-09 | 2018-12-14 | 上海航天设备制造总厂有限公司 | A kind of air tightness detection system and its detection method of SLM device molding cavity |
| CN108759994A (en) * | 2018-08-15 | 2018-11-06 | 真兰仪表科技有限公司 | A kind of dry type gas meter, flow meter school missing inspection measurement equipment and its application method |
| CN108760192A (en) * | 2018-08-28 | 2018-11-06 | 麦克传感器股份有限公司西安分公司 | A kind of portable sealed assembly detection apparatus and detection method |
| 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 |
| CN109596281A (en) * | 2018-12-29 | 2019-04-09 | 广东德洛斯照明工业有限公司 | A kind of test device for air tightness and test method |
| CN110400739A (en) * | 2019-08-08 | 2019-11-01 | 北京市人工影响天气办公室 | A kind of pressure control sampling device for airborne aerosol mass spectrometer |
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