CN107576458A - A kind of brake line of automobile air-tightness automatic detection device and its detection method - Google Patents
A kind of brake line of automobile air-tightness automatic detection device and its detection method Download PDFInfo
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- CN107576458A CN107576458A CN201710882431.9A CN201710882431A CN107576458A CN 107576458 A CN107576458 A CN 107576458A CN 201710882431 A CN201710882431 A CN 201710882431A CN 107576458 A CN107576458 A CN 107576458A
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- 238000001514 detection method Methods 0.000 title claims abstract description 46
- 238000012360 testing method Methods 0.000 claims abstract description 66
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 17
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 12
- 239000000344 soap Substances 0.000 claims abstract description 10
- 230000008859 change Effects 0.000 claims abstract description 5
- 239000006260 foam Substances 0.000 claims abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- 241000790917 Dioxys <bee> Species 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 claims 1
- 230000006012 detection of carbon dioxide Effects 0.000 claims 1
- 239000003337 fertilizer Substances 0.000 claims 1
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000009897 systematic effect Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 22
- 230000005611 electricity Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a kind of brake line of automobile air-tightness automatic detection device and its detection method, including air inlet pipeline, test pipeline, gas exhaust piping；Air inlet pipeline includes compressed air gas source, the first magnetic valve, first pressure sensor, and test pipeline includes second solenoid valve, second pressure sensor, and gas exhaust piping includes the 3rd magnetic valve；Air-tightness is detected using differential pressure method and combination soap lather detection method, carbon dioxide airtight property automatic testing method.The present invention realizes brake line of automobile air-tightness automatic detection, the quantity of test pipeline can be set according to production requirement simultaneously, improve detection efficiency and precision, the demand of automatic detection when meeting large-scale production, the direct pressure closing used compared to artificial detection, pressure differential method can effectively reduce error caused by systematic error and environmental change；Traditional pressure differential method is compared simultaneously, without introducing reference piece, simplifies apparatus structure, compensate for the limitation that conventional soap foam detection method searches leak point.
Description
Technical field
The invention belongs to air-leakage test field, more particularly to a kind of brake line of automobile air-tightness automatic detection device and
Its detection method.
Background technology
Current more than 4 tons of car nearly all uses air-pressure brake, and the air-tightness of brake line of automobile directly affects vehicle
Braking ability, it is closely bound up with the lives and properties of people.
The traditional detection mode of vehicle air-tightness be vehicle (chassis) brakes under a certain pressure, using ARTMechanical gas pressure
Pressure reduces situation in table measurement a period of time.Because vehicle (chassis) pipeline is complicated, to ensure accuracy of detection, it is necessary to longer
Detection time.Because the artificial detection cycle is long, error is big, efficiency is low, it is easy to which the product quality that causes finally to dispatch from the factory is difficult to control.
At the same time, when detecting that tested pipeline has leak point, traditional soap lather detection method can not be looked into effectively
Find out minor leakage point.
The content of the invention
It is an object of the invention to overcome problem above existing for prior art, there is provided a kind of brake line of automobile air-tightness
Automatic detection device and its detection method, effectively improve air-leakage test efficiency.
To realize above-mentioned technical purpose and the technique effect, the present invention is achieved through the following technical solutions：
A kind of brake line of automobile air-tightness automatic detection device, including air inlet pipeline, test pipeline, gas exhaust piping；
The air inlet pipeline includes compressed air gas source, the first magnetic valve, first pressure sensor, and test pipeline includes the
Two magnetic valves, second pressure sensor, gas exhaust piping include the 3rd magnetic valve；
The first magnetic valve input is connected with compressed air gas source, the first magnetic valve output end and second solenoid valve
Input is connected, and second solenoid valve output end is connected with tested pipeline；
It is other between first magnetic valve and second solenoid valve to be connected to first pressure sensor and the 3rd magnetic valve.
Further, it is also other between first magnetic valve and second solenoid valve to be connected to the 4th magnetic valve, the 4th magnetic valve
Input is connected with CO 2 high pressure source of the gas, is easy to further search leakage point.
Further, it is also other between first magnetic valve and second solenoid valve to be connected to some test pipelines, detection efficiency
It is higher.
Further, first magnetic valve, second solenoid valve, the 3rd magnetic valve use the magnetic valve of same model,
First pressure sensor, second pressure sensor use the sensor of same model, and installation cost is cheaper, change and tie up
It is more convenient to repair.
The present invention also provides a kind of brake line of automobile air-tightness automatic testing method, the described method comprises the following steps：
Step 1：Tested pipeline is accessed into test pipeline, connects compressed air gas source, opens the first electricity on air inlet pipeline
Magnet valve, bleed pressure is acquired by first pressure sensor and is designated as P1；
Step 2：The second solenoid valve on test pipeline is opened, by second pressure sensor to the gas on test pipeline
Pressure value is acquired and is designated as P2；
Step 3：P1 and P2 difference is designated as pressure difference P, when pressure difference P is equal to zero, first closed on air inlet pipeline is electric
Second solenoid valve on magnet valve and test pipeline；
Step 4：Pressurize is carried out according to the time of setting, if pressure difference P is less than defined error threshold after pressurize, is judged
It is qualified for tested pipeline air-tight test, otherwise it is determined as that tested pipeline air-tight test is unqualified.
Further, the second electromagnetism closed in the step 3 on the first magnetic valve on air inlet pipeline and test pipeline
After valve, the curve that P1, P2, P are changed over time is recorded and shown by computer, be easy to carry out more testing result
Get information about.
Further, the first pressure sensor, second pressure sensor, the first magnetic valve, second solenoid valve with
Single-chip microcomputer is connected, and single-chip microcomputer is also associated with alarm, if pressure difference P is more than or equal to defined error threshold, monolithic after pressurize
Machine control alarm for opening sends warning and reminded, and ensure that the reliability and security of detection.
Further, if it is determined that qualified for tested pipeline air-tight test in the step 4, then opening is tested on pipeline
Second solenoid valve and gas exhaust piping on the 3rd magnetic valve, for compressed air to be drained；It is if it is determined that airtight for tested pipeline
Property experiment it is unqualified after, leakage point is searched using soap lather detection method, detection it is more quick and easy.
Further, after being searched using soap lather detection method leakage point, if leakage point can not be found, use
The airtight property automatic testing method of carbon dioxide is detected, and the airtight property automatic testing method of the carbon dioxide comprises the following steps：
S1：By the 4th magnetic valve access between the first magnetic valve and second solenoid valve and with CO 2 high pressure source of the gas phase
Even；
S2：The 4th magnetic valve and second solenoid valve are opened successively, by first pressure sensor to bleed pressure now
It is acquired；
S3：If bleed pressure now is more than setting, the 4th magnetic valve and second solenoid valve are closed；
S4：The each pipe joint for being tested pipeline is detected using hand-held carbon dioxide detector, finds and disposes and let out
After leak source, the 3rd magnetic valve in the second solenoid valve and gas exhaust piping on test pipeline is opened, for carbon dioxide to be arranged
To the greatest extent；
S5：The 3rd magnetic valve that carbon dioxide is closed after draining in second solenoid valve and gas exhaust piping on test pipeline.
The beneficial effects of the invention are as follows：
1st, the present invention realizes brake line of automobile air-tightness automatic detection, while can set testing tube according to production requirement
The quantity on road, improves detection efficiency and precision, the demand of automatic detection when meeting large-scale production.
2nd, the present invention checks brake piping air-tightness using pressure differential method, the direct pressure closing used compared to artificial detection, pressure differential method
Error caused by systematic error and environmental change can be effectively reduced；Meanwhile the present invention compares traditional pressure differential method, contrasted without introducing
Workpiece, apparatus structure is simplified, reduce cost.
3rd, except the air-tightness using compressed air automatic detection brake line of automobile, the present invention use carbon dioxide simultaneously
Gases at high pressure search the minor leakage point of tested pipeline, compensate for the limitation that conventional soap foam detection method searches leak point.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the detection means schematic diagram of the present invention；
Fig. 2 is the testing process schematic diagram of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained all other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
In the description of the invention, it is to be understood that term " perforate ", " on ", " under ", " thickness ", " top ", " in ",
Indicating position or the position relationship such as " length ", " interior ", " surrounding ", it is for only for ease of the description present invention and simplifies description, without
It is that the component of instruction or hint meaning or element must have specific orientation, with specific azimuth configuration and operation, therefore not
It is understood that as limitation of the present invention.
A kind of brake line of automobile air-tightness automatic detection device as shown in Figure 1, including air inlet pipeline, test pipeline,
Gas exhaust piping；Air inlet pipeline includes compressed air gas source 2, the first magnetic valve 4, first pressure sensor 9, and test pipeline includes the
Two magnetic valves 6, second pressure sensor 7, gas exhaust piping include the 3rd magnetic valve 5；The input of first magnetic valve 4 and compressed air
Source of the gas 2 is connected, and the output end of the first magnetic valve 4 is connected with the input of second solenoid valve 6, the output end of second solenoid valve 6 and quilt
Test tube road 8 is connected；It is other between first magnetic valve 4 and second solenoid valve 6 to be connected to the magnetic valve 5 of first pressure sensor 9 and the 3rd；
Also other between first magnetic valve 4 and second solenoid valve 6 to be connected to the 4th magnetic valve 3, the input of the 4th magnetic valve 3 is high with carbon dioxide
Pressurized air source 1 is connected, and is easy to further search leakage point；It is also other between first magnetic valve 4 and second solenoid valve 6 to be connected to
Some test pipelines, detection efficiency are higher；First magnetic valve 4, second solenoid valve 6, the 3rd magnetic valve 5 are using same model
Magnetic valve, first pressure sensor 9, second pressure sensor 7 are lower using the sensor of same model, installation cost
Honest and clean, replacement and repair is more convenient.
As shown in Fig. 2 the present invention also provides a kind of brake line of automobile air-tightness automatic testing method, method includes following
Step：
Step 1：Tested pipeline is accessed into test pipeline, connects compressed air gas source, opens the first electricity on air inlet pipeline
Magnet valve, bleed pressure is acquired by first pressure sensor and is designated as P1；
Step 2：The second solenoid valve on test pipeline is opened, by second pressure sensor to the gas on test pipeline
Pressure value is acquired and is designated as P2；
Step 3：P1 and P2 difference is designated as pressure difference P, when pressure difference P is equal to zero, first closed on air inlet pipeline is electric
Second solenoid valve on magnet valve and test pipeline, is then recorded by computer to the curve that P1, P2, P are changed over time
And show, it is easy to carry out more intuitive understanding to testing result；
Step 4：Pressurize is carried out according to the time of setting, if pressure difference P is less than defined error threshold after pressurize, is judged
It is qualified for tested pipeline air-tight test, otherwise it is determined as that tested pipeline air-tight test is unqualified；First pressure sensor,
Two pressure sensors, the first magnetic valve, second solenoid valve are connected with single-chip microcomputer, and single-chip microcomputer is also associated with alarm, if protecting
Pressure difference P is more than or equal to defined error threshold after pressure, then single-chip microcomputer control alarm for opening sends warning and reminded, and ensure that
The reliability and security of detection；If it is determined that it is qualified for tested pipeline air-tight test, then open the second electricity on test pipeline
The 3rd magnetic valve on magnet valve and gas exhaust piping, for compressed air to be drained；If it is determined that for tested pipeline air-tight test not
After qualified, leakage point is searched using soap lather detection method, detection is more quick and easy；Computer or PLC can be used
Switch board is controlled to all magnetic valves and sensor.
After being searched using soap lather detection method leakage point, if leakage point can not be found, using carbon dioxide
Air-tightness automatic testing method is detected, and the airtight property automatic testing method of the carbon dioxide comprises the following steps：
S1：By the 4th magnetic valve access between the first magnetic valve and second solenoid valve and with CO 2 high pressure source of the gas phase
Even；
S2：The 4th magnetic valve and second solenoid valve are opened successively, by first pressure sensor to bleed pressure now
It is acquired；
S3：If bleed pressure now is more than setting, the 4th magnetic valve and second solenoid valve are closed；
S4：The each pipe joint for being tested pipeline is detected using hand-held carbon dioxide detector, finds and disposes and let out
After leak source, the 3rd magnetic valve in the second solenoid valve and gas exhaust piping on test pipeline is opened, for carbon dioxide to be arranged
To the greatest extent；
S5：The 3rd magnetic valve that carbon dioxide is closed after draining in second solenoid valve and gas exhaust piping on test pipeline.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means
At least one implementation of the present invention is contained in reference to specific features, structure, material or the feature that the embodiment or example describe
In example or example.In this manual, identical embodiment or example are not necessarily referring to the schematic representation of above-mentioned term.
Moreover, specific features, structure, material or the feature of description can close in any one or more embodiments or example
Suitable mode combines.
General principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.
Claims (9)
- A kind of 1. brake line of automobile air-tightness automatic detection device, it is characterised in that：Including air inlet pipeline, test pipeline, row Air pipe；The air inlet pipeline includes compressed air gas source (2), the first magnetic valve (4), first pressure sensor (9), tests pipeline Including second solenoid valve (6), second pressure sensor (7), gas exhaust piping includes the 3rd magnetic valve (5)；First magnetic valve (4) input is connected with compressed air gas source (2), the first magnetic valve (4) output end and second Magnetic valve (6) input is connected, and second solenoid valve (6) output end is connected with tested pipeline (8)；It is other between first magnetic valve (4) and second solenoid valve (6) to be connected to first pressure sensor (9) and the 3rd magnetic valve (5)。
- A kind of 2. brake line of automobile air-tightness automatic detection device according to claim 1, it is characterised in that：Described It is also other between one magnetic valve (4) and second solenoid valve (6) to be connected to the 4th magnetic valve (3), the 4th magnetic valve (3) input and dioxy Change carbon high-pressure air source (1) to be connected.
- A kind of 3. brake line of automobile air-tightness automatic detection device according to claim 1, it is characterised in that：Described It is also other between one magnetic valve (4) and second solenoid valve (6) to be connected to some test pipelines.
- A kind of 4. brake line of automobile air-tightness automatic detection device according to claim 1, it is characterised in that：Described One magnetic valve (4), second solenoid valve (6), the 3rd magnetic valve (5) use the magnetic valve of same model, first pressure sensor (9), second pressure sensor (7) uses the sensor of same model.
- A kind of 5. brake line of automobile air-tightness automatic testing method, it is characterised in that：It the described method comprises the following steps：Step 1：Tested pipeline is accessed into test pipeline, compressed air gas source is connected, opens the first electromagnetism on air inlet pipeline Valve, bleed pressure is acquired by first pressure sensor and is designated as P1；Step 2：The second solenoid valve on test pipeline is opened, by second pressure sensor to the atmospheric pressure value on test pipeline It is acquired and is designated as P2；Step 3：P1 and P2 difference is designated as pressure difference P, when pressure difference P is equal to zero, the first magnetic valve on closing air inlet pipeline With the second solenoid valve on test pipeline；Step 4：Carry out pressurize according to the time of setting, if pressure difference P is less than defined error threshold after pressurize, be determined as by Test tube road air-tight test is qualified, is otherwise determined as that tested pipeline air-tight test is unqualified.
- A kind of 6. brake line of automobile air-tightness automatic testing method according to claim 5, it is characterised in that：The step In rapid three close air inlet pipeline on the first magnetic valve and test pipeline on second solenoid valve after, by computer to P1, P2, The curve that P is changed over time is recorded and shown.
- A kind of 7. brake line of automobile air-tightness automatic testing method according to claim 5, it is characterised in that：Described One pressure sensor, second pressure sensor, the first magnetic valve, second solenoid valve are connected with single-chip microcomputer, and single-chip microcomputer also connects Alarm is connected to, if pressure difference P is more than or equal to defined error threshold after pressurize, single-chip microcomputer control alarm for opening sends warning Reminded.
- A kind of 8. brake line of automobile air-tightness automatic testing method according to claim 5, it is characterised in that：The step It is in rapid four if it is determined that qualified for tested pipeline air-tight test, then open in the second solenoid valve and gas exhaust piping on test pipeline The 3rd magnetic valve, for compressed air to be drained；If it is determined that for tested pipeline air-tight test it is unqualified after, using soap bubble Foam detection method is searched leakage point.
- A kind of 9. brake line of automobile air-tightness automatic testing method according to claim 8, it is characterised in that：Using fertilizer After soap bubble foam detection method is searched leakage point, if leakage point can not be found, using the airtight property automatic detection of carbon dioxide Method is detected, and the airtight property automatic testing method of the carbon dioxide comprises the following steps：S1：4th magnetic valve is accessed between the first magnetic valve and second solenoid valve and is connected with CO 2 high pressure source of the gas；S2：The 4th magnetic valve and second solenoid valve are opened successively, and bleed pressure now is carried out by first pressure sensor Collection；S3：If bleed pressure now is more than setting, the 4th magnetic valve and second solenoid valve are closed；S4：The each pipe joint for being tested pipeline is detected using hand-held carbon dioxide detector, finds and disposes leakage point After, the 3rd magnetic valve in the second solenoid valve and gas exhaust piping on test pipeline is opened, for carbon dioxide to be drained；S5：The 3rd magnetic valve that carbon dioxide is closed after draining in second solenoid valve and gas exhaust piping on test pipeline.
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| CN201710882431.9A CN107576458A (en) | 2017-09-26 | 2017-09-26 | A kind of brake line of automobile air-tightness automatic detection device and its detection method |
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| CN201710882431.9A CN107576458A (en) | 2017-09-26 | 2017-09-26 | A kind of brake line of automobile air-tightness automatic detection device and its detection method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108488629A (en) * | 2018-03-27 | 2018-09-04 | 广州合众生物科技有限公司 | A kind of gas pressure reduction system and method with warning function |
| CN110006606A (en) * | 2019-03-01 | 2019-07-12 | 南京涵铭置智能科技有限公司 | A kind of pipeline air-tightness automatic detection test bed and its working method |
| CN110567656A (en) * | 2019-09-27 | 2019-12-13 | 佛山市飞驰汽车制造有限公司 | Device and method for detecting air tightness of chassis brake system of passenger car |
| CN110763403A (en) * | 2019-11-20 | 2020-02-07 | 广汽乘用车有限公司 | System and method for rapidly detecting air tightness of automobile part |
| CN110940468A (en) * | 2019-05-05 | 2020-03-31 | 山西永有制冷科技有限公司 | Intelligent airtight detection test bed |
| CN112254888A (en) * | 2020-10-12 | 2021-01-22 | 广东铭利达科技有限公司 | Device for detecting compactness of three electric systems of automobile |
| CN112304536A (en) * | 2020-11-04 | 2021-02-02 | 上海加冷松芝汽车空调股份有限公司 | Decompression valve detection equipment and detection method |
| CN113295351A (en) * | 2021-06-21 | 2021-08-24 | 湖南行必达网联科技有限公司 | Method for detecting air tightness of whole vehicle |
| CN113465843A (en) * | 2021-07-21 | 2021-10-01 | 上海外高桥造船有限公司 | Equipment and method for detecting tightness of ship pipeline system |
| CN114216631A (en) * | 2021-01-12 | 2022-03-22 | 襄阳达安汽车检测中心有限公司 | High-low temperature air tightness test system for automobile brake hose |
| CN114518206A (en) * | 2022-02-22 | 2022-05-20 | 佛山市美的清湖净水设备有限公司 | Membrane element air tightness detection system and detection method |
| CN114993572A (en) * | 2022-06-20 | 2022-09-02 | 苏州浪潮智能科技有限公司 | Air tightness detection device, system and detection method |
| CN115158272A (en) * | 2022-06-30 | 2022-10-11 | 东风商用车有限公司 | Leakage prediction method and device for air brake system |
| US11598690B2 (en) | 2019-08-09 | 2023-03-07 | Contemporary Amperex Technology Co., Limited | Apparatus for detecting air tightness |
| CN116593091A (en) * | 2023-05-12 | 2023-08-15 | 山东郓城金达挂车制造有限公司 | Semitrailer air tightness test tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108488629A (en) * | 2018-03-27 | 2018-09-04 | 广州合众生物科技有限公司 | A kind of gas pressure reduction system and method with warning function |
| CN110006606A (en) * | 2019-03-01 | 2019-07-12 | 南京涵铭置智能科技有限公司 | A kind of pipeline air-tightness automatic detection test bed and its working method |
| CN110940468A (en) * | 2019-05-05 | 2020-03-31 | 山西永有制冷科技有限公司 | Intelligent airtight detection test bed |
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| CN110567656A (en) * | 2019-09-27 | 2019-12-13 | 佛山市飞驰汽车制造有限公司 | Device and method for detecting air tightness of chassis brake system of passenger car |
| CN110567656B (en) * | 2019-09-27 | 2024-04-05 | 佛山市飞驰汽车科技有限公司 | Device and method for detecting air tightness of chassis brake system of passenger car |
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Application publication date: 20180112 |