CN207180966U - A kind of differential pressure method test device for air tightness - Google Patents
A kind of differential pressure method test device for air tightness Download PDFInfo
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- CN207180966U CN207180966U CN201721192964.6U CN201721192964U CN207180966U CN 207180966 U CN207180966 U CN 207180966U CN 201721192964 U CN201721192964 U CN 201721192964U CN 207180966 U CN207180966 U CN 207180966U
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Abstract
It the utility model is related to a kind of differential pressure method test device for air tightness.It is characterized in that including main pipeline, the first bi-bit bi-pass cylinder control pipeline valve, the second bi-bit bi-pass cylinder control pipeline valve, the 3rd bi-bit bi-pass cylinder control pipeline valve, the first precision pressure gauge, the second precision pressure gauge and U-tube manometer.The utility model can improve pressure test scope that U-tube manometer is unable to reach by precision pressure gauge and can be by the test pressure required for intake-air throttle valve flexible modulation；And U-tube manometer can make up minimum division value and the stability that pressure gauge is unable to reach, can there can be the number of No leakage and leakage rate with accurate judgement measured piece by the U-tube manometer observed on main pipeline.
Description
Technical field
It the utility model is related to a kind of differential pressure method test device for air tightness.
Background technology
In current industrial air tightness test technology, there are following several conventional air-tightness detection methods.
Immersion（Oil）Visual bubble method：The object for needing to detect air-tightness is placed in the liquid objects such as water or oil,
Observe whether it alveolate can produce.If produced without bubble, illustrate that the air-tightness of the object is good.If bubble
Generation, then illustrate the object air-tightness existing defects.The detection method equipment is simple, visual result, but accuracy of detection and effect
Rate is low, and human factor has a great influence, while can also bring the humidity impurity that gets rusty the harmful effect and follow-up such as to immerse to tested device
Cumbersome surface attached water（Or oil）Drying process.
In summary, in the current state-of-the-art, to air tightness test during environmental requirement will be stablized relatively and
And it can not test in different environments.Generally use is soaked in correlation technique（Oil）Visual bubble method, U-tube manometer detection
Method, precision pressure gauge detection method etc..The problem of more or less all be present in it, can not system comprehensively meet it is various on the market
The detection of device air-tightness, just production efficient to enterprise, harsh and unforgiving environments experiment cause obstacle for this.
Utility model content
For problems of the prior art, the purpose of this utility model is to provide a kind of differential pressure method air tightness test
The technical scheme of device.
Described a kind of differential pressure method test device for air tightness, it is characterised in that including main pipeline, the first bi-bit bi-pass cylinder
Control pipeline valve, the second bi-bit bi-pass cylinder control pipeline valve, the 3rd bi-bit bi-pass cylinder control pipeline valve, the first precision pressure
Table, the second precision pressure gauge and U-tube manometer, the first bi-bit bi-pass cylinder control pipeline valve, the second bi-bit bi-pass cylinder
Control pipeline valve and the 3rd bi-bit bi-pass cylinder control pipeline valve are successively set on main pipeline, the control of the first bi-bit bi-pass cylinder
The first four-way and the 4th threeway, the second bi-bit bi-pass cylinder are set between pipeline valve and the second bi-bit bi-pass cylinder control pipeline valve
5th threeway and the second four-way, first four-way one end are set between control pipeline valve and the 3rd bi-bit bi-pass cylinder control pipeline valve
The first precision pressure gauge is connected, the first four-way other end connects the second high-low temperature resistant metal hose, and the 4th threeway is U-shaped by first
Pressure gauge flexible pipe connection U-tube manometer one end, the 5th threeway connect the U-tube manometer other end by the second U-tube manometer flexible pipe,
Second four-way one end connects the second precision pressure gauge, and the second four-way other end connects the first high-low temperature resistant metal hose.
Described a kind of differential pressure method test device for air tightness, it is characterised in that the inlet end of the main pipeline is set into moral
Flow valve.
Described a kind of differential pressure method test device for air tightness, it is characterised in that the exhaust end of the main pipeline sets exhaust section
Flow valve.
A kind of described differential pressure method test device for air tightness, it is characterised in that the first bi-bit bi-pass cylinder control pipeline
Valve, the second bi-bit bi-pass cylinder control pipeline valve and the 3rd bi-bit bi-pass cylinder control pipeline valve control it by external switch
Break-make.
Described a kind of differential pressure method test device for air tightness, it is characterised in that the external switch uses manual two-position five-way
Pneumatic valve.
Described a kind of differential pressure method test device for air tightness, it is characterised in that the manual two-position five-way Pneumatic valve is divided into
One manual two-position five-way Pneumatic valve, the second manual two-position five-way Pneumatic valve and the 3rd manual two-position five-way Pneumatic valve, first manual
Two-position five-way Pneumatic valve, the second manual two-position five-way Pneumatic valve and the 3rd manual two-position five-way gas control valve arrangement are identical, first-hand
Dynamic two-position five-way Pneumatic valve, the second manual two-position five-way Pneumatic valve and the 3rd manual two-position five-way Pneumatic valve correspond to control the respectively
Three bi-bit bi-pass cylinder control pipeline valves, the first bi-bit bi-pass cylinder control pipeline valve and the second bi-bit bi-pass cylinder control pipeline
Valve.
A kind of described differential pressure method test device for air tightness, it is characterised in that the second manual two-position five-way Pneumatic valve by
First air inlet, the second air inlet, first row gas port, the first muffler, air inlet control spanner, second exhaust port, the second noise reduction
Device and the first brasnch conduct are formed, and the first brasnch conduct connection main pipeline, the first air inlet and the second air inlet connect set respectively
Put two control terminals in the first bi-bit bi-pass cylinder control pipeline valve.
Compared with prior art, the beneficial effects of the utility model are, U-shaped pressure can be improved by precision pressure gauge
Count the pressure test scope that is unable to reach and can be by the test pressure required for intake-air throttle valve flexible modulation；And U-shaped pressure
Meter can make up minimum division value and the stability that pressure gauge is unable to reach, can be by observing the U-tube manometer on main pipeline
There can be the number of No leakage and leakage rate with accurate judgement measured piece.And magnetic valve is replaced by Pneumatic valve, it can be very good
Avoid producing heat so that gas expansion and misjudgment phenomenon caused by causing pressure change because being powered, and it is more safe.Should
It is connected between device and test block and standard component with high-low temperature resistant metal hose, metal hose can try by high/low temperature
Pipeline hole position in tryoff or other detection means connects, and can accomplish that detection means is under normal temperature and pressure, test block and mark
Quasi- part is placed in the particular surroundings of experimental box, therefore detection means will not be influenceed to cause testing result to be forbidden by experimental situation change
Really, the test of product extreme environment is adapted to.The present apparatus has reached measuring stability, pressure variability, the effect of input and output high efficiency
Fruit.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is a kind of implementation structural representation controlled by external switch；
Fig. 3 is external structure schematic diagram of the present utility model；
Wherein：1- source of the gas flexible pipes, the threeways of 2- first, 3- first enter source of the gas flexible pipe, and 4- second enters source of the gas flexible pipe, and 5- enters moral
Flow valve, 6- main pipelines, 7- the first bi-bit bi-pass cylinder control pipeline valves, the threeways of 8- second, the threeways of 9- the 3rd, 10- first manuals
Two-position five-way Pneumatic valve, the air inlets of 11- second, the air inlets of 12- first, 13- first row gas ports, the mufflers of 14- first, 15- enter
Gas control spanner, 16- second exhaust port, the mufflers of 17- second, the manual two-position five-way Pneumatic valves of 18- second, the branches of 19- first
Conduit, the four-ways of 20- first, 21- first pressure table flexible pipes, the precision pressure gauges of 22- first, the threeways of 23- the 4th, 24- bis- or two
Two-way cylinder control pipeline valve, the air inlets of 25- the 3rd, the air inlets of 26- the 4th, the 3rd manual two-position five-way Pneumatic valves of 27-, 28-
3rd exhaust outlet, the mufflers of 29- the 3rd, the exhaust outlets of 30- the 4th, the mufflers of 31- the 4th, the brasnch conducts of 32- second, 33- tests
Control spanner, 34- the first U-tube manometer flexible pipes, the threeways of 35- the 5th, 36- the second U-tube manometer flexible pipes, 37-U U-tube manometers,
The four-ways of 38- second, 39- second pressure gauge flexible pipes, the precision pressure gauges of 40- second, the bi-bit bi-pass cylinder control pipelines of 41- the 3rd
Valve, the air inlets of 42- the 5th, the air inlets of 43- the 6th, 44- gas exhaust inspecting spanners, the exhaust outlets of 45- the 5th, the mufflers of 46- the 5th,
The exhaust outlets of 47- the 6th, the mufflers of 48- the 6th, 49- exhaust shutters, 50- main pipeline exhaust outlets, 51- the first high-low temperature resistant metals
Flexible pipe, 52- the second high-low temperature resistant metal hoses, 53- rear casings, 54- connecting valves, 55- front cover shells, the lifting of 56- stainless steels are pulled
Hand, 57- graduation marks.
Embodiment
With reference to Figure of description, the utility model is described in further detail：
A kind of differential pressure method test device for air tightness, including main pipeline 6, the first bi-bit bi-pass cylinder control pipeline valve 7, second
Bi-bit bi-pass cylinder control pipeline valve 24, the 3rd bi-bit bi-pass cylinder control pipeline valve 41, first the 22, second essence of precision pressure gauge
Close pressure gauge 40 and U-tube manometer 37, the first bi-bit bi-pass cylinder control pipeline valve 7, the second bi-bit bi-pass cylinder control pipeline
The bi-bit bi-pass cylinder control pipeline valve 41 of valve 24 and the 3rd is successively set on main pipeline 6, the first bi-bit bi-pass cylinder control pipe
First four-way 20 and the 4th threeway 23 be set between the bi-bit bi-pass cylinder control pipeline valve 24 of road valve 7 and second, the two or two two
Ventilate and the 5th threeway 35 and the second four-way are set between cylinder control pipeline valve 24 and the 3rd bi-bit bi-pass cylinder control pipeline valve 41
36, the one end of the first four-way 20 connects the first precision pressure gauge 22, and it is soft that the other end of the first four-way 20 connects the second high-low temperature resistant metal
Pipe 52, the 4th threeway 23 connect the one end of U-tube manometer 37 by the first U-tube manometer flexible pipe 34, and the 5th threeway 35 passes through the 2nd U
U-tube manometer flexible pipe 36 connects the other end of U-tube manometer 37, and the one end of the second four-way 38 connects the second precision pressure gauge the 40, the 2nd 4
Logical 38 other ends connect the first high-low temperature resistant metal hose 51, and the inlet end of main pipeline 6 sets intake-air throttle valve 5, main pipeline
Exhaust end sets exhaust shutter 49.
Preferably, the first bi-bit bi-pass cylinder control pipeline valve of the present utility model, the second bi-bit bi-pass cylinder control
Pipeline valve and the 3rd bi-bit bi-pass cylinder control pipeline valve control its break-make by external switch, and external switch uses manual two
The logical Pneumatic valve in position five.
Preferably, manual two-position five-way Pneumatic valve of the present utility model be divided into first manual two-position five-way Pneumatic valve 10,
Second manual 18 and the 3rd manual two-position five-way Pneumatic valve 27 of two-position five-way Pneumatic valve, first manual two-position five-way Pneumatic valve,
Two manual two-position five-way Pneumatic valves and the 3rd manual two-position five-way gas control valve arrangement are identical, first manual two-position five-way Pneumatic valve,
Second manual two-position five-way Pneumatic valve and the 3rd manual two-position five-way Pneumatic valve correspond to the 3rd bi-bit bi-pass cylinder control of control respectively
Tubing giving sufficient strength valve, the first bi-bit bi-pass cylinder control pipeline valve and the second bi-bit bi-pass cylinder control pipeline valve.
By taking the second manual two-position five-way Pneumatic valve as an example, introduce manual two-position five-way Pneumatic valve and controlled with bi-bit bi-pass cylinder
The connected mode of pipeline valve：Second manual two-position five-way Pneumatic valve is by the first air inlet, the second air inlet, first row gas port,
One muffler, air inlet control spanner, second exhaust port, the second muffler and the first brasnch conduct are formed, and the first brasnch conduct connects
Logical main pipeline, the first air inlet and the second air inlet connect respectively is arranged on two of the first bi-bit bi-pass cylinder control pipeline valve
Control terminal.
Embodiment
Source of the gas flexible pipe 1 is divided by the first threeway 2 to be entered source of the gas flexible pipe 3 and second for first and enters source of the gas flexible pipe 4.
First enters setting intake-air throttle valve 5 on source of the gas flexible pipe 3, is connected to main pipeline 6.Is disposed with main pipeline 6
One bi-bit bi-pass cylinder control pipeline valve 7, the first four-way 20, the 4th threeway 23, the second bi-bit bi-pass cylinder control pipeline valve 24,
5th threeway 35, the second four-way 38, the 3rd bi-bit bi-pass cylinder control pipeline valve 41, exhaust shutter 49 and main pipeline exhaust outlet
50.Wherein：First four-way 20 another two is logical, and one crosses first pressure table flexible pipe 21 all is connected to the first precision pressure gauge 22, and one is logical
Connect the second high-low temperature resistant metal hose 52；Second four-way 38 another two is logical, and one crosses second pressure gauge flexible pipe 39 all is connected to the
Two precision pressure gauges 40, one leads to and connects the first high-low temperature resistant metal hose 51；4th threeway, 23 another first U-shaped pressure excessively all
Meter flexible pipe 34 is connected to U-tube manometer 37；5th threeway, 35 another second U-tube manometer flexible pipe 36 of crossing all is connected to U-shaped pressure
Power meter 37.
Second enters on source of the gas flexible pipe 4 to set the second threeway 8 and the 3rd threeway 9, will by the second threeway 8 and the 3rd threeway 9
First manual two-position five-way Pneumatic valve 10, the second manual 18 and the 3rd manual two-position five-way gas control valve 18 of two-position five-way Pneumatic valve
With source of the gas soft pipe connection（Connected with main pipeline）.
Wherein：Second threeway, 8 another first brasnch conduct 19 of crossing all is connected to the second manual two-position five-way Pneumatic valve 18,
First row gas port 13, second exhaust port 16 are provided with second manual two-position five-way Pneumatic valve 18, the first air inlet 12, second is entered
Gas port 11 and air inlet control spanner 15, and the first muffler 14 is set on first row gas port 13, and second exhaust port 16 sets second to disappear
Sound device 17.First air inlet 12 and the second air inlet 11 are all connected on the first bi-bit bi-pass cylinder control pipeline valve 7.
The one of 3rd threeway 9 crosses the second brasnch conduct 32 and is connected to the 3rd manual two-position five-way Pneumatic valve 27 all, and the 3rd
The 3rd exhaust outlet 28, the 4th exhaust outlet 30, the 3rd air inlet 25, the 4th air inlet are provided with manual two-position five-way Pneumatic valve 27
26 and testing and control spanner 33, the 3rd muffler 29 is provided with the 3rd exhaust outlet 28, and the 4th exhaust outlet 30 is provided with the 4th and disappeared
Sound device 31, the 3rd air inlet 25 and the 4th air inlet 26 are all connected on the second bi-bit bi-pass cylinder control pipeline valve 24.
The another of 3rd threeway 9 logical is directly connected to first manual two-position five-way Pneumatic valve 10, first manual two-position five-way gas
The 5th exhaust outlet 45, the 6th exhaust outlet 48, the 5th air inlet 42, the 6th air inlet 43 and gas exhaust inspecting are provided with control valve 10 to pull
Hand 44, the 5th muffler 46 is provided with the 5th exhaust outlet 45, the 6th exhaust outlet 48 is provided with the 6th muffler 47, the 5th air inlet
The air inlet 43 of mouth 42 and the 6th is all connected on the 3rd bi-bit bi-pass cylinder control pipeline valve 41.
Air inlet control wrench 15 is identical with the mode of operation of testing and control spanner 33 and gas exhaust inspecting spanner 44, to enter gas control
Exemplified by spanner 15 processed：
It is to be in valve opening state when air inlet control spanner 15 is opened.
When air inlet control spanner 15 is opened, the first brasnch conduct 19 is connected with the first air inlet 12, and gas passes through first
Air inlet 12 is entered in the first bi-bit bi-pass cylinder control pipeline valve 7, then gas just enters second by the second air inlet 11
In manual two-position five-way Pneumatic valve 18, then discharge by first row gas port 13.The first bi-bit bi-pass has just been promoted among this process
Cylinder up moves in cylinder control pipeline valve 7, has turned on the first bi-bit bi-pass cylinder control pipeline valve 7 and main pipeline 6
Current path, reach the state of the valve opening of the first bi-bit bi-pass cylinder control pipeline valve 7.
It is to be in close valve state when air inlet control spanner 15 is closed.
When air inlet control spanner 15 is closed, the first brasnch conduct 19 enters two gas ports 11 with the and is connected, and gas passes through second
Air inlet 11 is entered in the first bi-bit bi-pass cylinder control pipeline valve 7, then gas just enters second by the first air inlet 12
In manual two-position five-way Pneumatic valve 18, then discharge by second exhaust port 16.The first bi-bit bi-pass has just been promoted among this process
Cylinder moves down in cylinder control pipeline valve 7, is shut off the gas of the first bi-bit bi-pass cylinder control pipeline valve 7 and main pipeline 6
Logical circulation road, reach the state that the first bi-bit bi-pass cylinder control pipeline valve 7 closes valve.
Setting can be fixed by outside mechanical structure in structure of the present utility model, introduce a kind of installation knot herein
Structure：One mounting seat is set, and mounting seat includes base and backrest cover, the first 7, the 2nd 2 two, bi-bit bi-pass cylinder control pipeline valve
Cylinder control pipeline of ventilating valve 24, the 3rd bi-bit bi-pass cylinder control pipeline valve 41, the second manual two-position five-way Pneumatic valve the 18, the 3rd
Manual two-position five-way Pneumatic valve 27 and first manual two-position five-way Pneumatic valve 20 is arranged on base, the first precision pressure gauge 22,
Second precision pressure gauge 40 and U-tube manometer 37 are arranged in backrest cover, and backrest cover is divided into front cover shell and rear casing, front cover shell 55
On be provided with two stainless steels lifting spanners 56 and connecting valve 54, and rear casing 53 is connected to front cover shell by connecting valve 54
On 55, the position to match on front cover shell 55 with U-tube manometer 37 is provided with graduation mark 57, is easy to compare U-tube manometer both ends
Liquid level changes.
Operation principle：
First：Standard component and test block are passed through into the first high-low temperature resistant metal hose 51 and the second high-low temperature resistant metal respectively
Flexible pipe 52 is connected in test device, confirms that air inlet control spanner 15, testing and control spanner 33 and gas exhaust inspecting spanner 44 are in
The state of valve is closed, after confirmation, testing and control spanner 33 is opened successively and air inlet control spanner 15 is at the state of valve opening；
And then, gas can be filled with into test device by source of the gas flexible pipe 1（Can by the precision pressure gauge 22 of observation first and really
Second precision pressure gauge 40 recognizes the size of institute's charged pressure）, reach closing air inlet control spanner 15 after required pressure, make at its
In the state for closing valve（Note：Different intake velocities can be reached by adjusting intake-air throttle valve 5, because according to different marks
The caliber size of quasi- part and measured piece and the size of inner capacities are, it is necessary to which different feed rate reaches the accuracy of air inlet and standard
True property）；Finally, after test pressure needed for reaching, testing and control spanner 33 is closed, is at closing the state of valve；Stand piece
After quarter, the change of the liquid level of U-tube manometer 37 is observed, illustrates that test block air-tightness is good if liquid level does not change, such as
Fruit liquid level is changed, and illustrates that test block air-tightness has problem, can also compare liquid level with the change above scale, accurate
True leakage rate number, so as to airtight sex chromosome mosaicism existing for accurate judgement test block the order of severity.
This test device can be tested below high/low temperature situation.Because standard component and test block and test device it
Between be to be connected by the first high-low temperature resistant metal hose 51 with the second high-low temperature resistant metal hose 52, we can be by standard component
It is placed on test block in high-low temperature chamber, then passes through the first high-low temperature resistant metal hose 51 and the second high-low temperature resistant metal hose
52 are connected in the test device outside high-low temperature chamber, are then carried out step by step by testing procedure, finally detect test block and exist
Air-tightness situation in the case of high/low temperature.
Claims (7)
1. a kind of differential pressure method test device for air tightness, it is characterised in that including main pipeline, the first bi-bit bi-pass cylinder control pipeline
Valve, the second bi-bit bi-pass cylinder control pipeline valve, the 3rd bi-bit bi-pass cylinder control pipeline valve, the first precision pressure gauge, second
Precision pressure gauge and U-tube manometer, the first bi-bit bi-pass cylinder control pipeline valve, the second bi-bit bi-pass cylinder control pipeline
Valve and the 3rd bi-bit bi-pass cylinder control pipeline valve are successively set on main pipeline, the first bi-bit bi-pass cylinder control pipeline valve and
First four-way and the 4th threeway, the second bi-bit bi-pass cylinder control pipeline are set between the second bi-bit bi-pass cylinder control pipeline valve
5th threeway and the second four-way, first four-way one end connection first are set between valve and the 3rd bi-bit bi-pass cylinder control pipeline valve
Precision pressure gauge, the first four-way other end connect the second high-low temperature resistant metal hose, and the 4th threeway is soft by the first U-tube manometer
Pipe connection U-tube manometer one end, the 5th threeway connect the U-tube manometer other end, the second four-way by the second U-tube manometer flexible pipe
One end connects the second precision pressure gauge, and the second four-way other end connects the first high-low temperature resistant metal hose.
A kind of 2. differential pressure method test device for air tightness according to claim 1, it is characterised in that the air inlet of the main pipeline
End sets intake-air throttle valve.
A kind of 3. differential pressure method test device for air tightness according to claim 1, it is characterised in that the exhaust of the main pipeline
End sets exhaust shutter.
A kind of 4. differential pressure method test device for air tightness according to claim 1, it is characterised in that first bi-bit bi-pass
Cylinder control pipeline valve, the second bi-bit bi-pass cylinder control pipeline valve and the 3rd bi-bit bi-pass cylinder control pipeline valve are by outer
Portion's switch control break-make.
5. a kind of differential pressure method test device for air tightness according to claim 4, it is characterised in that the external switch uses
Manual two-position five-way Pneumatic valve.
A kind of 6. differential pressure method test device for air tightness according to claim 5, it is characterised in that the manual two-position five-way
Pneumatic valve is divided into first manual two-position five-way Pneumatic valve, the second manual two-position five-way Pneumatic valve and the 3rd manual two-position five-way gas control
Valve, first manual two-position five-way Pneumatic valve, the second manual two-position five-way Pneumatic valve and the 3rd manual two-position five-way gas control valve arrangement
It is identical, first manual two-position five-way Pneumatic valve, the second manual two-position five-way Pneumatic valve and the 3rd manual two-position five-way Pneumatic valve point
The 3rd bi-bit bi-pass cylinder control pipeline valve, the first bi-bit bi-pass cylinder control pipeline valve and the second bi-bit bi-pass Dui Ying not controlled
Cylinder control pipeline valve.
7. a kind of differential pressure method test device for air tightness according to claim 6, it is characterised in that described second manual two
Five logical Pneumatic valves control spanner, second exhaust by the first air inlet, the second air inlet, first row gas port, the first muffler, air inlet
Mouth, the second muffler and the first brasnch conduct are formed, the first brasnch conduct connection main pipeline, the first air inlet and the second air inlet
Connection is arranged on two control terminals of the first bi-bit bi-pass cylinder control pipeline valve respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721192964.6U CN207180966U (en) | 2017-09-18 | 2017-09-18 | A kind of differential pressure method test device for air tightness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721192964.6U CN207180966U (en) | 2017-09-18 | 2017-09-18 | A kind of differential pressure method test device for air tightness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207180966U true CN207180966U (en) | 2018-04-03 |
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ID=61747647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721192964.6U Active CN207180966U (en) | 2017-09-18 | 2017-09-18 | A kind of differential pressure method test device for air tightness |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207180966U (en) |
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2017
- 2017-09-18 CN CN201721192964.6U patent/CN207180966U/en active Active
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