CN109211492A - A kind of air tightness detection system and method - Google Patents

A kind of air tightness detection system and method Download PDF

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Publication number
CN109211492A
CN109211492A CN201811260676.9A CN201811260676A CN109211492A CN 109211492 A CN109211492 A CN 109211492A CN 201811260676 A CN201811260676 A CN 201811260676A CN 109211492 A CN109211492 A CN 109211492A
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CN
China
Prior art keywords
air
air valve
components
detection
tightness
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Granted
Application number
CN201811260676.9A
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Chinese (zh)
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CN109211492B (en
Inventor
单丰武
雷芳
邹峰
黄飞
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.)
Jiangxi Jiangling Group New Energy Automobile Co Ltd
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Jiangxi Jiangling Group New Energy Automobile Co Ltd
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Priority to CN201811260676.9A priority Critical patent/CN109211492B/en
Publication of CN109211492A publication Critical patent/CN109211492A/en
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Publication of CN109211492B publication Critical patent/CN109211492B/en
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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00Investigating fluid-tightness of structures
    • G01M3/02Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00Investigating fluid-tightness of structures
    • G01M3/02Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/28Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
    • G01M3/2807Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
    • G01M3/2815Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes using pressure measurements
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00Investigating fluid-tightness of structures
    • G01M3/02Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/28Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
    • G01M3/2838Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for cables
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00Investigating fluid-tightness of structures
    • G01M3/02Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/28Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
    • G01M3/2876Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for valves

Abstract

The invention discloses a kind of air tightness detection systems, applied on automobile, including gas source, wiring harness test component, components detection components and orthobaric volume tank, the wiring harness test component, the components detection components and the orthobaric volume tank are separately connected the gas source, the wiring harness test component is used to detect the air-tightness of the harness on the automobile, the components detection components are used to detect the air-tightness of other components other than the harness on the automobile, the orthobaric volume tank is connected to the wiring harness test component and the components detection components respectively, first pressure sensor and second pressure sensor are respectively equipped on the pipeline that the orthobaric volume tank is connected to the wiring harness test component and the components detection components.Wiring harness test component and components detection components share an orthobaric volume tank, reduce production cost.The invention also discloses a kind of airtight detection methods using above-mentioned air tightness detection system.

Description

A kind of air tightness detection system and method
Technical field
The present invention relates to auto parts and components processing technique fields, more particularly to a kind of air tightness detection system and method.
Background technique
With the rapid development of auto industry and the promotion of people's living standard, automobile has become people's trip, shipping Etc. indispensable one of the vehicles.
Automobile needs to detect its being sealed property of components in process of production, such as the air-tightness of harness and other components Detection, air-tightness is extremely important for auto parts and components, if its air-tightness Shortcomings, will lead to leak and infiltration etc. and asks Topic, so as to cause the partial function failure in hermetic connector.Existing air tightness detection apparatus can individually detect harness or The air-tightness of other components.
Existing air tightness detection apparatus is when detecting the air-tightness of harness or other components, it is necessary to be separately connected different Orthobaric volume tank injects gas into air-leakage test component and orthobaric volume tank simultaneously by gas source, with air-leakage test group Pressure change in part judges whether product is that air-tightness is good, then air tightness detection apparatus domestic demand is at least provided with two orthobaric volumes Tank inevitably results in device volume and becomes larger, increased costs.
Summary of the invention
An object of the present invention is to provide a kind of air tightness detection systems for only needing an orthobaric volume tank.
A kind of air tightness detection system is applied on automobile, including gas source, wiring harness test component, components detection components With orthobaric volume tank, the wiring harness test component, the components detection components and the orthobaric volume tank are separately connected described Gas source, the wiring harness test component are used to detect the air-tightness of the harness on the automobile, and the components detection components are used for Detect the air-tightness of other components other than the harness on the automobile, the orthobaric volume tank respectively with the wiring harness test Component is connected to the components detection components, and the orthobaric volume tank and the wiring harness test component and the components detect First pressure sensor and second pressure sensor are respectively equipped on the pipeline of component connection.
The air tightness detection system proposed according to the present invention, wiring harness test component and components detection components share a mark Quasi- volume tank reduces production cost, and wiring harness test component and components detection components are directly connected to orthobaric volume tank, utilizes The simple design can meet the air-leakage test to harness and other components simultaneously.
In addition, the air tightness detection system provided according to the present invention, can also have the following additional technical features:
Further, the gas source is connect with the orthobaric volume tank, wiring harness test component and components detection components It is respectively equipped with the first air valve, the second air valve and third air valve on pipeline, then can pass through the first air valve, the second air valve and third air valve The gas transmission to corresponding component is controlled respectively.
Further, first air valve, the second air valve and third air valve are set in air valve assembly simultaneously, the air valve Assembly corresponds to first air valve, the second air valve and third air valve and was equipped with air drain and through-hole, described to cross between air drain mutually Separate, first air valve, the second air valve and third air valve be respectively arranged at it is described cross air drain in, the through-hole with it is corresponding described in Air drain connection is crossed, the through-hole is connected to the wiring harness test component, components detection components and orthobaric volume tank respectively, described First air valve, the second air valve and third air valve are crossed air drain cooperation and are sealed with described, when first air valve, the second air valve and the When three air valve sealings, the through-hole is closed state.
First air valve, the second air valve and third air valve is integrated with air valve assembly, it is carried out convenient for while to three air valves It adjusts.
Further, first air valve, the second air valve and third air valve include adjusting rod and piston, and the piston is set Be placed in it is described cross in air drain and cross air drain sealing with described and cooperate, the adjusting rod connects the piston and the protruding gas The shell of valve assembly, the adjusting rod are used to adjust the position of the piston.Then pass through adjusting rod, that is, adjusting piston position, Realize the opening and closing of each air valve.
Further, the shell is equipped with guide pad, and the adjusting rod runs through the guide pad, and guide pad increases outer The thickness of shell extends adjusting rod and shell contact length, can be oriented to the movement of adjusting rod, at the same prevent adjusting rod because By different directions power and lateral deviation occurs.
Further, cavity is equipped in the guide pad, the adjusting rod both passes through the cavity, first air valve Adjusting rod is equipped with first baffle, is equipped with second baffle on the adjusting rod of second air valve and the third air valve, works as institute When stating the piston of the second air valve or the third air valve with the corresponding disengaging closing of air drain excessively, described in the second baffle promotion First baffle, the first baffle drive the piston of first air valve to be detached from closing with the corresponding air drain of crossing.When the second gas Valve and third air valve will drive the first air valve opening when wherein any one is opened, make the user do not need again additional to open manually First air valve, enhances ease of use.
Further, the adjusting rod is to be slidably matched or be threadedly engaged with the guide pad, can be selected according to the actual situation It selects.
Further, the pipeline that the gas source is connect with the air valve assembly is equipped with the 4th air valve and third pressure sensing Device, the third pressure sensor are used to detect the air-tightness of the pipeline between the air valve assembly and the 4th air valve.
It is another object of the present invention to the air-tightness detection methods for proposing a kind of above-mentioned air tightness detection system, including Following steps:
The first air valve, the second air valve, third air valve are simultaneously closed off, the 4th air valve is opened, starting gas source starts to inflate;
Gas source and the 4th air valve are closed, whether observation third pressure sensor detection air pressure changes;
If it is unchanged that third pressure sensor detects air pressure, the first air valve, the second air valve, third air valve and the 4th gas are opened Valve, starting gas source start to inflate;
It closes the first air valve, the second air valve and third air valve, observes first pressure sensor and second pressure sensor The variation of detection pressure judges line when first pressure sensor, the detection pressure of second pressure sensor are unchanged respectively The air-tightness of components other than beam, harness is good, and no person judges that corresponding components air-tightness is insufficient.
Further, after whether the observation third pressure sensor detection air pressure changes further include:
If third pressure sensor detects air pressure and generates variation, the first air valve, the second air valve, third air valve and the 4th are checked The air-tightness of air valve, and replace the insufficient air valve of air-tightness.
Beneficial effects of the present invention include at least:
(1) wiring harness test component and components detection components share an orthobaric volume tank, reduce production cost;
(2) the first air valve, the second air valve and third air valve are integrated on air valve assembly, improve operation to air valve just Benefit;
(3) when opening any one air valve in the second air valve and third air valve, the first air valve can be opened therewith, subtract The operation for opening air valve is lacked;
It (4) can be to the first air valve, the second air valve, third air valve and the 4th air valve and pipeline therein using the 4th air valve Air-leakage test is carried out, prevents the air-tightness deficiency because of air valve or pipeline itself from leading to the mistake of detection.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures Obviously and it is readily appreciated that, in which:
Fig. 1 is the element connection schematic diagram of the air tightness detection system of first embodiment of the invention;
Fig. 2 is the specific element connection schematic diagram of air tightness detection system in Fig. 1;
Fig. 3 is the structural schematic diagram of air valve assembly in Fig. 2;
Fig. 4 is the schematic cross-sectional view of air valve assembly in Fig. 3;
Fig. 5 is the diagrammatic side-view cross-sectional structural schematic diagram of air valve assembly in Fig. 3;
In figure: 1- gas source, the 4th air valve of 11-, 2- wiring harness test component, the second air valve of 21-, 22- first pressure sensor, 3- orthobaric volume tank, the first air valve of 31-, 4- components detection components, 41- third air valve, 42- second pressure sensor, 5- gas Valve assembly, 51- shell, 511- through-hole, 512- cross air drain, 52- guide pad, 6- adjusting rod, 61- first baffle, 62- second gear Plate, 7- piston.
Specific embodiment
To keep objects, features and advantages of the present invention more obvious and easy to understand, with reference to the accompanying drawing to tool of the invention Body embodiment is described in detail.Several embodiments of the invention are given in attached drawing.But the present invention can be with many not With form realize, however it is not limited to embodiment described herein.On the contrary, purpose of providing these embodiments is makes to this The disclosure of invention is more thorough and comprehensive.
It should be noted that it can directly on the other element when element is referred to as " being fixedly arranged on " another element Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ", " right side ", "upper", "lower" and similar statement for illustrative purposes only, rather than the device or member of indication or suggestion meaning Part must have a particular orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc. Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected;It can be machine Tool connection, is also possible to be electrically connected;It can be directly connected, two members can also be can be indirectly connected through an intermediary Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be Concrete meaning in bright.Term " and or " used herein include the arbitrary of one or more relevant listed items and All combinations.
Fig. 1 and Fig. 2 are please referred to, the first embodiment of the present invention proposes a kind of air tightness detection system, it is applied on automobile, Including gas source 1, wiring harness test component 2, components detection components 4 and orthobaric volume tank 3.
The wiring harness test component 1, the components detection components 4 and the orthobaric volume tank 3 are separately connected the gas Source 1, the wiring harness test component 2 are used to detect the air-tightness of the harness on the automobile, and the components detection components 4 are used for The air-tightness of other components other than the harness on the automobile is detected, the orthobaric volume tank 3 is examined with the harness respectively It surveys component 2 be connected to the components detection components 4, the orthobaric volume tank 3 and the wiring harness test component 2 and zero described First pressure sensor 22 and second pressure sensor 42 are respectively equipped on the pipeline that part detection components 4 are connected to.
In the present invention, wiring harness test component 2 and components detection components 4 share an orthobaric volume tank 3, reduce life Cost is produced, wiring harness test component 2 and components detection components 4 are directly connected to orthobaric volume tank 3, are using the simple design The air-leakage test to the harness of automobile and other components can be met simultaneously.
Specifically, the gas source 1 is connect with the orthobaric volume tank 3, wiring harness test component 2 and components detection components 4 Pipeline on be respectively equipped with the first air valve 31, the second air valve 21 and third air valve 41, then can pass through the first air valve 31, the second air valve 21 and third air valve 41 control the gas transmission to corresponding component respectively.
Fig. 3~Fig. 5 is please referred to, preferably, first air valve 31, the second air valve 21 and third air valve 41 are set simultaneously It is placed in air valve assembly 5, corresponding first air valve 31 of the air valve total 5, the second air valve 21 and third air valve 41 were equipped with Air drain 512 and through-hole 511, described cross between air drain 512 are spaced from each other, first air valve 31, the second air valve 21 and third gas Valve 41 is respectively arranged in the air drain 512 excessively, and the through-hole 511 is connected to the corresponding air drain 512 of crossing, the through-hole 511 3 (not shown), first air valve are connected to the wiring harness test component 2, components detection components 4 and orthobaric volume tank respectively 31, the second air valve 21 and third air valve 41 cross the cooperation sealing of air drain 512 with described, when first air valve 31, the second air valve 21 and third air valve 41 seal when, the through-hole 511 be closed state.
In the present embodiment, first air valve 31, the second air valve 21 and third air valve 41 include adjusting rod 6 and piston 7, piston 7 be set to it is described cross air drain 512 in, the first air valve 31, the second air valve 21 and third air valve 41 by piston 7 with Cross the sealing cooperation of air drain 512.
Further, the pipeline that the gas source 1 is connect with the air valve assembly 5 is equipped with the 4th air valve 11 and third pressure Sensor 12,12 sensor of third pressure are used to detect the pipeline between the air valve assembly 5 and the 4th air valve 11 Air-tightness.
The adjusting rod 6 connects the shell 51 of the piston 7 and the protruding air valve assembly 5, and the adjusting rod 6 is used In the position for adjusting the plug of work 7.
It according to the above structure can be the position of adjusting piston 7 by adjusting rod 6, realize the opening and closing of each air valve.
The advantage of above structure is, the first air valve 31, the second air valve 21 and third air valve 41 are integrated and air valve assembly In, convenient for three air valves are adjusted simultaneously.
Further, the shell 51 is equipped with guide pad 52, and the adjusting rod 6 runs through the guide pad 52, guiding Block 52 increases the thickness of shell 51, extends adjusting rod 6 and 51 contact length of shell, can lead to the movement of adjusting rod 6 To, while preventing adjusting rod 6 from lateral deviation occurring due to the power by different directions.
In order to realize the simple and fast of adjusting air valve, it is equipped with cavity 521 in the guide pad 52, the adjusting rod 6 is worn Cross the cavity 521, the adjusting rod 6 of first air valve 31 is equipped with first baffle 61, second air valve 21 and described the Be equipped with second baffle 62 on the adjusting rod of three air valves 41, when the piston 7 of second air valve 21 or the third air valve 41 with When the correspondence disengaging of air drain 512 excessively is closed, the second baffle 62 pushes the first baffle 61,61 band of first baffle The piston for moving first air valve 21 is detached from closing with the corresponding air drain 512 of crossing.
In the present embodiment, the above structure can specific manifestation are as follows: guide pad 52 is set to 51 top of shell, first baffle 61 Above second baffle 62.
It, i.e., can band when the second air valve 21 and wherein any one opening of third air valve 41 on the basis of the above structure Dynamic first air valve 31 is opened, and is made the user do not need again additional the first air valve 31 of opening manually, is enhanced ease of use.
In the present embodiment, the adjusting rod 6 is to be slidably matched, then pass through external fixed structure pair with the guide pad 52 Adjusting rod 6 is fixed, and the lasting opening of corresponding air valve can be realized.In other embodiments, adjusting rod 6 and the guide pad 52 may be to be threadedly engaged, and those skilled in that art can select according to the actual situation.
The second embodiment of the present invention proposes a kind of air-tightness detection method, using above-mentioned air tightness detection system, including Following steps:
The first air valve, the second air valve, third air valve are simultaneously closed off, the 4th air valve is opened, starting gas source starts to inflate;
Gas source and the 4th air valve are closed, whether observation third pressure sensor detection air pressure changes;
If it is unchanged that third pressure sensor detects air pressure, the first air valve, the second air valve, third air valve and the 4th gas are opened Valve, starting gas source start to inflate;
It closes the first air valve, the second air valve and third air valve, observes first pressure sensor and second pressure sensor The variation of detection pressure judges line when first pressure sensor, the detection pressure of second pressure sensor are unchanged respectively The air-tightness of components other than beam, harness is good, and no person judges that corresponding components air-tightness is insufficient.
The effect of 4th air valve is that the observation third pressure sensor detection air pressure is also wrapped after whether changing It includes:
If third pressure sensor detects air pressure and generates variation, the first air valve, the second air valve, third air valve and the 4th are checked The air-tightness of air valve, and replace the insufficient air valve of air-tightness.
By the air-tightness of priority check air valve and pipeline, the mistake generated in the detection process can be prevented.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any One or more embodiment or examples in can be combined in any suitable manner.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.

Claims (10)

1. a kind of air tightness detection system is applied on automobile, which is characterized in that including gas source, wiring harness test component, components Detection components and orthobaric volume tank, the wiring harness test component, the components detection components and orthobaric volume tank difference The gas source is connected, the wiring harness test component is used to detect the air-tightness of the harness on the automobile, the components detection Component is used to detect the air-tightness of other components other than harness on the automobile, the orthobaric volume tank respectively with it is described Wiring harness test component is connected to the components detection components, the orthobaric volume tank and the wiring harness test component and described zero First pressure sensor and second pressure sensor are respectively equipped on the pipeline of component detection components connection.
2. air tightness detection system according to claim 1, which is characterized in that the gas source and the orthobaric volume tank, The first air valve, the second air valve and third air valve are respectively equipped on the pipeline that wiring harness test component is connected with components detection components, The gas transmission to corresponding component can be then controlled respectively by the first air valve, the second air valve and third air valve.
3. air tightness detection system according to claim 2, which is characterized in that first air valve, the second air valve and Three air valves are set in air valve assembly simultaneously, and it is equal that the air valve assembly corresponds to first air valve, the second air valve and third air valve It was equipped with air drain and through-hole, described cross between air drain is spaced from each other, and first air valve, the second air valve and third air valve are set respectively Be placed in it is described cross air drain in, the through-hole with it is corresponding it is described excessively air drain be connected to, the through-hole respectively with the wiring harness test component, Components detection components are connected to orthobaric volume tank, and first air valve, the second air valve and third air valve cross air drain with described Cooperation sealing, when first air valve, the second air valve and third air valve sealing, the through-hole is closed state.
4. air tightness detection system according to claim 3, which is characterized in that first air valve, the second air valve and Three air valves include adjusting rod and piston, the piston be set to it is described cross in air drain and cross air drain sealing with described and cooperate, institute The shell that adjusting rod connects the piston and the protruding air valve assembly is stated, the adjusting rod is for adjusting the piston Position.
5. air tightness detection system according to claim 4, which is characterized in that the shell is equipped with guide pad, described Adjusting rod runs through the guide pad.
6. air tightness detection system according to claim 4, which is characterized in that cavity is equipped in the guide pad, it is described Adjusting rod both passes through the cavity, and the adjusting rod of first air valve is equipped with first baffle, second air valve and described the It is equipped with second baffle on the adjusting rod of three air valves, when the piston of second air valve or the third air valve and the corresponding mistake When air drain is detached from closing, the second baffle pushes the first baffle, and the first baffle drives the work of first air valve Plug is detached from closing with the corresponding air drain of crossing.
7. air tightness detection system according to claim 5, which is characterized in that the adjusting rod is to slide with the guide pad Dynamic cooperation is threadedly engaged.
8. according to air tightness detection system described in claim 3~7 any one, which is characterized in that the gas source with it is described The pipeline of air valve assembly connection is equipped with the 4th air valve and third pressure sensor, and the third pressure sensor is for detecting institute State the air-tightness of the pipeline between air valve assembly and the 4th air valve.
9. a kind of air-tightness detection method, using air tightness detection system according to any one of claims 8, which is characterized in that including with Lower step:
The first air valve, the second air valve, third air valve are simultaneously closed off, the 4th air valve is opened, starting gas source starts to inflate;
Gas source and the 4th air valve are closed, whether observation third pressure sensor detection air pressure changes;
If it is unchanged that third pressure sensor detects air pressure, the first air valve, the second air valve, third air valve and the 4th air valve are opened, Starting gas source starts to inflate;
The first air valve, the second air valve and third air valve are closed, the detection of first pressure sensor and second pressure sensor is observed The variation of pressure judges harness, line when first pressure sensor, the detection pressure of second pressure sensor are unchanged respectively The air-tightness of components other than beam is good, and no person judges that corresponding components air-tightness is insufficient.
10. air-tightness detection method according to claim 9, which is characterized in that the observation third pressure sensor inspection After whether survey air pressure changes further include:
If third pressure sensor detects air pressure and generates variation, the first air valve, the second air valve, third air valve and the 4th air valve are checked Air-tightness, and replace the insufficient air valve of air-tightness.
CN201811260676.9A 2018-10-26 2018-10-26 Air tightness detection system and method Active CN109211492B (en)

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