CN103091052B - Normal temperature vacuum leak-detection system used for spacecraft part assembly - Google Patents

Normal temperature vacuum leak-detection system used for spacecraft part assembly Download PDF

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Publication number
CN103091052B
CN103091052B CN201110344872.6A CN201110344872A CN103091052B CN 103091052 B CN103091052 B CN 103091052B CN 201110344872 A CN201110344872 A CN 201110344872A CN 103091052 B CN103091052 B CN 103091052B
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leak
valve
vacuum
leak detection
referance
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CN103091052A (en
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史纪军
孙立臣
郭海涛
孙立志
张海峰
汪力
齐飞飞
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Beijing Institute of Spacecraft Environment Engineering
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Beijing Institute of Spacecraft Environment Engineering
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Abstract

The invention discloses a normal temperature vacuum leak-detection system. According to the vacuum leak-detection system, due to the fact that a screw dry pump is selected to serve as a preceding-level sucking pump, a high vacuum leak-detection valve is additionally arranged between a high vacuum main pump and a high vacuum valve. A standard leak air exhaust valve, a standard leak leakage detecting valve and a standard leak sucking pump are arranged between a standard leak and a vacuum container. The valves used for detecting leakage are connected with a control unit through a service cable, wherein the control unit is provided with manual and automatic control modes. Therefore, automatic calibration of the leak-detection system is achieved.

Description

For the leak detection system of spacecraft parts normal-temperature vacuum leak detection
Technical field
The invention belongs to the field of non destructive testing of spacecraft parts sealing property, the vacuum leak detecting system used under being specifically related to a kind of normal temperature, this system is mainly used in the leak detection of spacecraft parts.
Background technology
For the spacecraft parts with seal request, sealing property test is the test event that must carry out.At present, the sealing property test of China's spacecraft parts mostly adopts the leak hunting method of vacuum leak hunting.The referance leak of vacuum leak hunting adopts film to ooze helium type referance leak usually, but, be subject to the impact of the factors such as the accumulation of referance leak helium, forepump type and environment helium reflux, the raising of leak detection sensitivities and the error of test leak rate reduce, and all receive restriction to a certain degree.
Summary of the invention
The object of the invention is to reduce film and ooze the test leak rate error that helium type referance leak helium accumulation problem causes, by reducing forepumping pump, leak detection sensitivities being improved to the split ratio of helium, the reflux that reduces environment helium.
A kind of leak detection system for Ministry of Aerospace Industry's assembly normal-temperature vacuum leak detection, comprise cylindrical vacuum vessel, high vacuum valve, high vacuum leak detection valve, high vacuum pump, forepumping valve, forepumping pump, prime leak detection valve, helium mass spectrometer leak detector, referance leak, referance leak leak detection valve, referance leak aspiration pump, referance leak evacuating valve and control module, the barrel of vacuum tank is connected to high vacuum valve and referance leak leak detection valve, the other end of high vacuum valve is connected with high vacuum pump, forepumping pump is connected with high vacuum pump by forepumping valve, between high vacuum valve and high vacuum pump, pump-line between high vacuum pump and forepumping valve to be hunted leak valve respectively by high vacuum, prime leak detection valve is connected with helium mass spectrometer leak detector, between the other end of referance leak leak detection valve and referance leak, four-way vacuum interface is set, the four interfaces connection standard small opening leak detection valve respectively of four-way vacuum interface, referance leak evacuating valve, referance leak and referance leak venting valve, referance leak aspiration pump is connected with four-way vacuum interface by referance leak evacuating valve, the other end JA(junction ambient) air of referance leak venting valve, wherein, high vacuum valve, high vacuum leak detection valve, high vacuum main pump, prime leak detection valve, forepumping valve, forepumping pump, referance leak leak detection valve, referance leak aspiration pump, referance leak evacuating valve is connected with control module by service cable, helium mass spectrometer leak detector is connected with control module with test cable by service cable.
Preferably, the type of forepumping pump is the dry pump of screw rod.
Preferably, the type of forepumping valve, high vacuum leak detection valve, forepumping valve, prime leak detection valve, referance leak leak detection valve, referance leak evacuating valve is normally closed ELECTROMAGNETIC VACUUM valve.
Preferably, the type of referance leak venting valve is for often to open ELECTROMAGNETIC VACUUM valve.
Further, helium mass spectrometer leak detector can access leak detection system by hunt leak valve or prime leak detection valve two kinds of modes of high vacuum.
Further, control module manually and automatically can control the opening and closing of high vacuum leak detection valve, prime leak detection valve, referance leak leak detection valve and referance leak evacuating valve.
Further, referance leak is that film oozes helium type referance leak.
The present invention has following beneficial effect: 1. forepumping pump adopts the dry pump of screw rod, under the prerequisite keeping forvacuum degree, can reduce forepump to the split ratio of helium, and then improve leak detection sensitivities.2. the type of forepumping valve, high vacuum leak detection valve, prime leak detection valve, referance leak leak detection valve and referance leak evacuating valve is ELECTROMAGNETIC VACUUM valve, is conducive to the realization of leak detection system automatic calibration function.3. high vacuum leak detection valve is set between high vacuum valve and high vacuum pump, when environment concentrations of helium is higher, can ensures that the sensitivity of leak detection system does not reduce.4. standard evacuating valve, referance leak venting valve and referance leak aspiration pump are set between referance leak and referance leak leak detection valve, the helium accumulation problem that film oozes helium type referance leak can be eliminated.5. sliding vane rotary pump oozes in helium type referance leak helium accumulation problem at elimination film, has vacuum tightness performance and Eco-power double dominant.6. single automatic calibration function that can realize leak detection system is controlled.
Accompanying drawing explanation
Fig. 1 is the instrument and equipment connection diagram of the leak detection system of spacecraft parts normal-temperature vacuum of the present invention leak detection.
Fig. 2 is the control linkage schematic diagram of the leak detection system of spacecraft parts normal-temperature vacuum of the present invention leak detection.
In figure: 1-vacuum tank; 2-referance leak leak detection valve; 3-referance leak venting valve; 4-four-way vacuum interface; 5-referance leak; 6-referance leak evacuating valve; 7-referance leak aspiration pump; 8-high vacuum valve, 9-high vacuum pump; 10-forepumping valve; 11-forepumping pump; 12-prime leak detection valve; 13-helium mass spectrometer leak detector; 14-high vacuum leak detection valve; 15-service cable; 16-test cable; 17-control module.
Embodiment
Referring to accompanying drawing, the present invention is described in detail, but the object that accompanying drawing is only not illustrated, be not intended to carry out any restriction to protection scope of the present invention, its scope is limited by appending claims.
Fig. 1 shows the leak detection system schematic diagram of spacecraft parts normal-temperature vacuum of the present invention leak detection.The leak detection system of the normal-temperature vacuum leak detection of this spacecraft parts, comprise cylindrical vacuum vessel 1, high vacuum valve 8, high vacuum leak detection valve 14, high vacuum pump 9, forepumping valve 10, forepumping pump 11, prime leak detection valve 12, helium mass spectrometer leak detector 13, referance leak 5, referance leak leak detection valve 2, referance leak aspiration pump 7, referance leak evacuating valve 6 and control module 17, the barrel of vacuum tank 1 is connected to high vacuum valve 8 and referance leak leak detection valve 2, the other end of high vacuum valve 8 is connected with high vacuum pump 9, forepumping pump 11 is connected with high vacuum pump 9 by forepumping valve 10, between high vacuum valve 8 and high vacuum pump 9, pump-line between high vacuum pump 9 with forepumping valve 10 is connected with helium mass spectrometer leak detector 13 respectively by high vacuum valve 14 and prime valve 12 of hunting leak of hunting leak, the other end of referance leak leak detection valve 2 and referance leak 5, such as film oozes helium type referance leak, between four-way vacuum interface 4 is set, four interfaces connection standard small opening leak detection valve 2, referance leak evacuating valve 6, referance leak 5 and the referance leak venting valve 3 respectively of four-way vacuum interface 4, referance leak aspiration pump 7 is connected with four-way vacuum interface 4 by referance leak evacuating valve 6, the other end JA(junction ambient) air of referance leak venting valve 3.
In this embodiment, the type of forepumping pump 11 is the dry pump of screw rod, the type of forepumping valve 10, high vacuum leak detection valve 14, prime leak detection valve 12, referance leak leak detection valve 2 and referance leak evacuating valve 6 is ELECTROMAGNETIC VACUUM valve, and referance leak venting valve 3 is open type solenoid vacuum valve.Generally, helium mass spectrometer leak detector 13 accesses leak detection system by prime leak detection valve 12.When concentrations of helium is higher in atmospheric environment, close prime leak detection valve 12, helium mass spectrometer leak detector 13 accesses leak detection system by high vacuum leak detection valve 14 and hunts leak, and then improves leak detection system.If the type of referance leak 5 is film ooze helium type, when leak detection system does not work or system does not power up, referance leak venting valve 3 is held open, and avoids the helium accumulation of referance leak.After leak detection system energising runs, standard of closure small opening leak detection valve 2 and referance leak venting valve 3, open referance leak evacuating valve 6, operation standard small opening aspiration pump 7, makes the mouth of taking out of referance leak 5 keep vacuum state, when needs carry out leak detection system timing signal always, standard of closure small opening evacuating valve 6, open referance leak leak detection valve 2, the calibration of leak detection system can be carried out, it also avoid the helium accumulation of referance leak 5 in vacuum tank 1 vacuum simultaneously.
Fig. 2 shows the electrical connection schematic diagram of spacecraft parts normal-temperature vacuum leak detection system of the present invention.Wherein high vacuum valve, high vacuum leak detection valve, high vacuum main pump, forepumping valve, forepumping pump, prime leak detection valve, referance leak evacuating valve, referance leak aspiration pump, referance leak leak detection valve are connected with control module 17 respectively by service cable 15, and helium mass spectrometer leak detector is connected with control module 17 with test cable 16 by service cable 15.
Although give detailed description and explanation to the specific embodiment of the present invention above; but what should indicate is; those skilled in the art can carry out various equivalence according to spirit of the present invention to above-mentioned embodiment and change and amendment; its function produced do not exceed that instructions and accompanying drawing contain spiritual time, all should within scope.

Claims (7)

1., for a leak detection system for Ministry of Aerospace Industry's assembly normal-temperature vacuum leak detection, comprise columniform vacuum tank (1), high vacuum valve (8), high vacuum leak detection valve (14), high vacuum pump (9), forepumping valve (10), forepumping pump (11), prime leak detection valve (12), helium mass spectrometer leak detector (13), referance leak (5), referance leak leak detection valve (2), referance leak aspiration pump (7), referance leak evacuating valve (6) and control module (17), it is characterized in that, the barrel of vacuum tank (1) is connected to high vacuum valve (8) and referance leak leak detection valve (2), the other end of high vacuum valve (8) is connected with high vacuum pump (9), forepumping pump (11) is connected with high vacuum pump (9) by forepumping valve (10), between high vacuum valve (8) and high vacuum pump (9), pump-line between high vacuum pump (9) and forepumping valve (10) to be hunted leak valve (14) respectively by high vacuum, prime leak detection valve (12) is connected with helium mass spectrometer leak detector (13), between the other end of referance leak leak detection valve (2) and referance leak (5), four-way vacuum interface (4) is set, four interfaces connection standard small opening leak detection valve (2) respectively of four-way vacuum interface (4), referance leak evacuating valve (6), referance leak (5) and referance leak venting valve (3), referance leak aspiration pump (7) is connected with four-way vacuum interface (4) by referance leak evacuating valve (6), the other end JA(junction ambient) air of referance leak venting valve (3), wherein, high vacuum valve (8), high vacuum leak detection valve (14), high vacuum pump (9), prime leak detection valve (12), forepumping valve (10), forepumping pump (11), referance leak leak detection valve (2), referance leak aspiration pump (7), referance leak evacuating valve (6) is connected with control module (17) by service cable (15), helium mass spectrometer leak detector is connected with control module with test cable (16) by service cable (15).
2., as claimed in claim 1 for the leak detection system of Ministry of Aerospace Industry's assembly normal-temperature vacuum leak detection, it is characterized in that, the type of described forepumping pump is the dry pump of screw rod.
3. as claimed in claim 1 or 2 for the leak detection system of Ministry of Aerospace Industry's assembly normal-temperature vacuum leak detection, it is characterized in that, the type of forepumping valve, high vacuum leak detection valve, forepumping valve, prime leak detection valve, referance leak leak detection valve, referance leak evacuating valve is normally closed ELECTROMAGNETIC VACUUM valve.
4. as claimed in claim 1 or 2 for the leak detection system of Ministry of Aerospace Industry's assembly normal-temperature vacuum leak detection, it is characterized in that, the type of referance leak venting valve is for often to open ELECTROMAGNETIC VACUUM valve.
5. as claimed in claim 1 or 2 for the leak detection system of Ministry of Aerospace Industry's assembly normal-temperature vacuum leak detection, it is characterized in that, control module is Non-follow control or the automatic control device controlling high vacuum leak detection valve, prime leak detection valve, referance leak leak detection valve, the opening and closing of referance leak evacuating valve.
6., as claimed in claim 1 or 2 for the leak detection system of Ministry of Aerospace Industry's assembly normal-temperature vacuum leak detection, it is characterized in that, referance leak is that film oozes helium type referance leak.
7. as claimed in claim 1 or 2 for the leak detection system of Ministry of Aerospace Industry's assembly normal-temperature vacuum leak detection, it is characterized in that, helium mass spectrometer leak detector accesses leak detection system by high vacuum leak detection valve or prime leak detection valve two kinds of modes.
CN201110344872.6A 2011-11-04 2011-11-04 Normal temperature vacuum leak-detection system used for spacecraft part assembly Active CN103091052B (en)

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CN104374532B (en) * 2014-10-29 2018-06-22 北京卫星环境工程研究所 The in-orbit leakage orientation method of spacecraft
CN104676175A (en) * 2015-01-29 2015-06-03 江苏广通管业制造有限公司 Novel vacuum four-way connector
CN106679895B (en) * 2015-11-06 2019-07-26 北京卫星环境工程研究所 Leak rate Auto-Test System applied to large space environment simulator
CN105651464B (en) * 2016-03-03 2018-12-25 北京卫星环境工程研究所 For scaling method after the leak detection sensitivities of Large Spacecraft leak detection
CN107543661B (en) * 2016-07-22 2019-11-26 北京卫星环境工程研究所 The adjustable vacuum leak hunting automated system of sensitivity
CN107367359B (en) * 2017-07-31 2019-04-19 哈尔滨电机厂有限责任公司 Large turbo-type generator vacuum decay testing inspection analytical equipment
CN109632214A (en) * 2018-11-30 2019-04-16 中国辐射防护研究院 A kind of radioactive substance shipping container package containment properties detection system and method
CN111555168A (en) * 2020-04-23 2020-08-18 吴童 Vacuum high-voltage power distribution room

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Inventor after: Sun Lichen

Inventor after: Zhang Tao

Inventor after: Liu Enjun

Inventor after: Shi Jijun

Inventor after: Ding Xilun

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