CN105928667A - Non-enclosed body leakage detection method and apparatus - Google Patents
Non-enclosed body leakage detection method and apparatus Download PDFInfo
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- CN105928667A CN105928667A CN201610293192.9A CN201610293192A CN105928667A CN 105928667 A CN105928667 A CN 105928667A CN 201610293192 A CN201610293192 A CN 201610293192A CN 105928667 A CN105928667 A CN 105928667A
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- close body
- vacuum
- leakage
- adsorbing mechanism
- leakage detection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/24—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using infrasonic, sonic, or ultrasonic vibrations
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- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a non-enclosed body leakage detection method and belongs to the field of gas leakage detection. The method comprises the following steps: covering a non-enclosed body with an absorption mechanism; performing vacuum-pumping on the absorption mechanism to enable negative pressure to be generated in an area covered by the absorption mechanism; and detecting ultrasonic wave signals on the back surface of a covered surface of the non-enclosed body, and according to the ultrasonic wave signals, determining a leakage point position. According to the invention, by use of a vacuum-pumping principle, the problem of leakage detection of the non-enclosed body can be solved, the disadvantages of long inflation and leakage elimination time, low efficiency, large apparatus volume and the like of conventional airtight detection of a large airplane are overcome, the purposes of detection in manufacturing and timely restoration are realized, and real-time performance of leakage detection and restoration is guaranteed. The invention further discloses a non-enclosed body leakage detection apparatus.
Description
Technical field
The present invention relates to a kind of leakage detection method, be especially a kind of non-close body leakage detection method and device, belong to Leakage inspection field.
Background technology
At present, the Leak Detection of non-close or open structure is all carried out in the general assembly stage.Large-scale complicated system, Leak Detection such as aircraft, there is the shortcoming such as inflation, row's leakage time length, its manufacturing cycle being not only added significantly to aircraft and cost, and hidden leakage point is difficult to directly repair, seriously constrain China's big aircraft development progress, it is also difficult to ensure the reliability of large aircraft.
Traditional supersonic gas body detecting method typically uses toward the internal supercharging means injecting air of container, for big Airplane detection, the most time-consumingly grow, efficiency is low, it is inaccurate to position, and the detection for non-close structure can only be implemented in the general assembly stage, it is impossible to accomplish to repair in time.
On December 24th, 2014, Chinese invention patent CN102967419A, disclose a kind of linear array type ultrasonic leak detection device and method, its ultrasonic signal produced by the ultrasonic array collection leakage of linear array type, dependency between signal calculated, introduce theory and the method for data fusion, thus judge to leak the position that whether there is and determine leakage.But the method just can carry out data acquisition after needing to inflate target to be measured, inapplicable for non-close body.
On April 15th, 2015, Chinese invention patent application 2013104529448, disclose a kind of portable noncontact space capsule body and leak ultrasound measuring instrument in-orbit.This detector includes the compositions such as some sonacs, laser range sensor, DSP digital processing circuit plate, filtering and amplifying circuit, LCD lattice lcd screen, has leakage and judges, range finding, leakage assessment and leak source positioning function.But, the present invention can only produce ultrasound wave in leak and just can carry out subsequent analysis equally in the case of to after sealing container inflation or there is high pressure inside container, inapplicable for non-close structure.
Summary of the invention
The technical problem to be solved is to overcome prior art defect, it is provided that a kind of non-close body leakage detection method and device that non-close can carry out air-leakage test in real time.
In order to solve this technical problem, the non-close body leakage detection method that the present invention provides, comprise the following steps:
Step one, by adsorbing mechanism cover on non-close body；
Step 2, adsorbing mechanism is carried out evacuation, in making to be entirely covered region, produce negative pressure；
Step 3, it is coated to the back side detection ultrasonic signal of capping at non-close body, and determines leakage point position according to ultrasonic signal.
As improvement, described adsorbing mechanism is rubber blanket.
The present invention provide for claim 1 non-close body leak detecting device, it is characterised in that: include vacuum system, adsorbing mechanism and ultrasonic signal detection device, described vacuum system connect adsorbing mechanism, described adsorbing mechanism cover on non-close body；Described ultrasonic signal detection device is coated to the ultrasonic signal at the capping back side for detecting non-close body.
As improvement, described vacuum system includes that vacuum meter, vacuum valve and vacuum pump, described vacuum meter and vacuum valve are all connected with vacuum pump, and described vacuum valve connects adsorbing mechanism.
As improvement, described adsorbing mechanism is rubber blanket.
The beneficial effects of the present invention is: (1), the present invention utilize the principle of evacuation, the Leak Detection problem of non-close body can be solved, overcome big aircraft tradition air-leakage test inflation, row the leakage time long, efficiency is low, the shortcomings such as device volume is big, detect in having reached to manufacture, the target repaired in time, it is ensured that Leak Detection and the real-time of reparation；(2), present configuration simple, be convenient for carrying, principle is simple, it is easy to operation, and detection efficiency is high, and testing cost is low, is suitable for promoting and making, it is possible to significantly improve the precision of Leak Detection.
Accompanying drawing explanation
Fig. 1 is non-close body leak detecting device schematic diagram of the present invention；
Fig. 2 is non-close body leakage detection method flow chart of the present invention；
In figure: 101-vacuum meter, 102-rubber blanket, 103-leakage point, 104-supersonic reflectoscope, 105-ultrasonic signal, 106-vacuum valve, 107-vacuum pump, 108-non-close body, 201-208 is respectively to implement step in detection method.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is described in further detail.
The present invention mainly utilizes vacuum extractor to produce high velocity air in leak under the conditions of non-close, is produced the principle of ultrasound wave according to high velocity air by leakage point leakage, utilizes supersonic reflectoscope to complete detection and the location of ultrasonic leak point.
As it is shown in figure 1, non-close body 108 leak detecting device of the present invention includes vacuum pump 107, vacuum meter 101, vacuum valve 106, rubber blanket 102 and supersonic reflectoscope 104.Vacuum meter 101 connects vacuum pump 107, and vacuum pump 107 connects one end of vacuum valve 106 by trachea, and the other end of vacuum valve 106 connects rubber blanket 102 by trachea.Rubber blanket 102 is similar to the structure of vacuum cup, and rubber blanket 102 is overall to be covered on the tested surface of detected non-close body 108 structure.
Supersonic reflectoscope 104 is arranged on the back side of the non-close body 108 structure tested surface of detection, is used for detecting ultrasonic signal.
Bled by internal generation of vacuum system that be operated in of vacuum pump 107, negative pressure is produced in the overlay area of rubber blanket 102, non-close body 108 is coated to capping opposite side air-flow and can be flowed to direction of bleeding by leakage point 103, such as the direction of arrow in figure, form air stream turbulence at leakage point 103, produce ultrasonic signal 105.The ultrasonic signal of leakage point 103 now detected with supersonic reflectoscope 104, and then can determine whether the position of leakage point 103.
As in figure 2 it is shown, non-close body leakage detection method of the present invention, specifically comprise the following steps that
Step 201: start vacuum pump, to vacuum system evacuation, makes internal system produce negative pressure.
Step 202: regulation vacuum valve, control system internal pressure.
Step 203: read vacuum gauge pressure value, when vacuum gauge pressure exceedes-0.08MPa, regulates vacuum valve so that it is less than this value；When vacuum gauge pressure is less than-0.08MPa, perform step 204.
Step 204: rubber blanket is covered and is non-close surface.
Step 205: when the absorption affinity deficiency of adsorbent equipment is so that its absorption is in non-close surface, returns and perform step 202, regulates vacuum valve, increase system negative pressure, then carries out by flow process；When absorption affinity can make adsorbent equipment fix, perform step 206.
Step 206: using ultrasonic leak detector, the back side being coated to capping at non-close body carries out signals collecting, obtains Wave data and the leakage rate size of sampling.
Step 207: according to the data gathered, determine leakage point position.
Step 208: close supersonic reflectoscope, closes vacuum pump, takes off device, off-test after device internal pressure relief upon adsorption.
Above a kind of non-close body leakage detection method provided by the present invention and device are described in detail, principle and the embodiment of the present invention are set forth by specific case used herein, and the explanation of above example is only intended to help to understand method and the core concept thereof of the present invention；Simultaneously for one of ordinary skill in the art, according to the thought of the present invention, the most all will change, in sum, this specification content should not be construed as limitation of the present invention.
Claims (5)
1. a non-close body leakage detection method, it is characterised in that comprise the following steps:
1), adsorbing mechanism is covered on non-close body；
2), adsorbing mechanism is carried out evacuation, in making to be entirely covered region, produce negative pressure；
3), it is coated to the back side detection ultrasonic signal of capping at non-close body, and determines the position of leakage point according to ultrasonic signal.
Non-close body leakage detection method the most according to claim 1, it is characterised in that: described adsorbing mechanism is rubber blanket.
3. the non-close body leak detecting device for claim 1, it is characterised in that: including vacuum system, adsorbing mechanism and ultrasonic signal detection device, described vacuum system connects adsorbing mechanism, and described adsorbing mechanism covers on non-close body；Described ultrasonic signal detection device is coated to the ultrasonic signal at the capping back side for detecting non-close body.
Non-close body leak detecting device the most according to claim 3, it is characterised in that: described vacuum system includes that vacuum meter, vacuum valve and vacuum pump, described vacuum meter and vacuum valve are all connected with vacuum pump, and described vacuum valve connects adsorbing mechanism.
5. according to the non-close body leak detecting device described in claim 3 or 4, it is characterised in that: described adsorbing mechanism is rubber blanket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610293192.9A CN105928667A (en) | 2016-05-06 | 2016-05-06 | Non-enclosed body leakage detection method and apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610293192.9A CN105928667A (en) | 2016-05-06 | 2016-05-06 | Non-enclosed body leakage detection method and apparatus |
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| CN105928667A true CN105928667A (en) | 2016-09-07 |
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| CN201610293192.9A Pending CN105928667A (en) | 2016-05-06 | 2016-05-06 | Non-enclosed body leakage detection method and apparatus |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107515082A (en) * | 2017-07-04 | 2017-12-26 | 西安飞机工业（集团）有限责任公司 | The airtight inspection method that a kind of aircraft skin is repaired |
| CN113280985A (en) * | 2021-05-24 | 2021-08-20 | 上海奋为船舶技术有限公司 | Ship watertight cabin sealing performance detection system and detection method |
| CN114323505A (en) * | 2022-03-18 | 2022-04-12 | 山西华羽盛泰科技有限公司 | Pressure container detection device |
| US20230204449A1 (en) * | 2021-12-29 | 2023-06-29 | Semes Co., Ltd. | Apparatus and method for inspecting gas leak |
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| EP1077370A2 (en) * | 1999-08-14 | 2001-02-21 | WT Thermo TEC Ltd. | A method of testing for a leak |
| CN201247130Y (en) * | 2008-07-24 | 2009-05-27 | 山海关船舶重工有限责任公司 | Case type tightness checkout tank for ship |
| CN101706350A (en) * | 2009-11-30 | 2010-05-12 | 广州文冲船厂有限责任公司 | Device for testing airtightness of weld joint on ship surface and using method thereof |
| CN106033020A (en) * | 2015-03-13 | 2016-10-19 | 中国航空工业集团公司西安飞机设计研究所 | Device and method for detecting air tightness of airplane structure under non-supercharged state |
-
2016
- 2016-05-06 CN CN201610293192.9A patent/CN105928667A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1077370A2 (en) * | 1999-08-14 | 2001-02-21 | WT Thermo TEC Ltd. | A method of testing for a leak |
| CN201247130Y (en) * | 2008-07-24 | 2009-05-27 | 山海关船舶重工有限责任公司 | Case type tightness checkout tank for ship |
| CN101706350A (en) * | 2009-11-30 | 2010-05-12 | 广州文冲船厂有限责任公司 | Device for testing airtightness of weld joint on ship surface and using method thereof |
| CN106033020A (en) * | 2015-03-13 | 2016-10-19 | 中国航空工业集团公司西安飞机设计研究所 | Device and method for detecting air tightness of airplane structure under non-supercharged state |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107515082A (en) * | 2017-07-04 | 2017-12-26 | 西安飞机工业（集团）有限责任公司 | The airtight inspection method that a kind of aircraft skin is repaired |
| CN113280985A (en) * | 2021-05-24 | 2021-08-20 | 上海奋为船舶技术有限公司 | Ship watertight cabin sealing performance detection system and detection method |
| US20230204449A1 (en) * | 2021-12-29 | 2023-06-29 | Semes Co., Ltd. | Apparatus and method for inspecting gas leak |
| CN114323505A (en) * | 2022-03-18 | 2022-04-12 | 山西华羽盛泰科技有限公司 | Pressure container detection device |
| CN114323505B (en) * | 2022-03-18 | 2022-06-10 | 山西华羽盛泰科技有限公司 | Pressure container detection device |
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