CN104006930A - Leak detection test bed - Google Patents
Leak detection test bed Download PDFInfo
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- CN104006930A CN104006930A CN201410257726.3A CN201410257726A CN104006930A CN 104006930 A CN104006930 A CN 104006930A CN 201410257726 A CN201410257726 A CN 201410257726A CN 104006930 A CN104006930 A CN 104006930A
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Abstract
The invention relates to an internal-pressurized and external-vacuum leak detection test bed. An air inflation pipeline in the test bed is communicated with an air storage bottle through a filter, a high pressure safety valve and a stop valve. The air storage bottle is communicated with a cavity of a detected assembly through a reducing valve and a low-pressure safety valve. The detected assembly is arranged in a vacuum working room which is connected with a helium mass spectrometer leak detector. The air inflation pipeline is connected with a pressure gauge. The leak detection test bed has the advantages of being accurate in leak detection data, multifunctional, stable in performance, convenient to operate and control, capable of achieving energy conservation and environment protection, safe, reliable and the like. The leak detection test bed and the helium mass spectrometer leak detector are connected to form an internal-pressurized and external-vacuum leak detection system.
Description
Technical field
The present invention relates to a kind of detection testing table, the inside that relates in particular to a kind of product needs pressurising, outside in the time of vacuum state, detects the leak test platform of its product leak rate, belongs to gas circuit and vacuum field.
Background technology
In a kind of production run of product, the key component of product wants welding quality to carry out several performance tests after welding, and wherein the slip of this assembly (value) is a very important index, and this operation is confirmed as forced examination point.
At present, on market, also do not have specially, for needs inside pressurising, outside in the vacuum state time, to product, to do the process equipment of hunting leak.In prior art, the detection of the comprehensive leak rate of similar products mostly adopts " bell jar process ", product cavity needs the being detected state that is evacuated, outside at product puts polybag, in polybag, be filled with a certain amount of helium again, then read the leak rate value on leak locator, then contrast criterion, determine that whether tested part is qualified.This method is " interior punching press, outer vacuum " method relatively, and condition is looser, and detecting data does not have the outer vacuum of interior punching press strict.
Summary of the invention
The present invention is directed to above-mentioned problems of the prior art, according to user, product leak rate being detected to the needs of being strict with sets out, the leak test platform of a kind of interior pressurising, outer vacuum is provided, has solved in prior art leak detection condition loose, detected not problem accurately of data.
Technical scheme of the present invention is as follows:
Testing table comprises loading line and vacuum workshop's two parts; Described loading line part: loading line is communicated with gas bomb by filtrator, high-pressure safety valve, stop valve; Gas bomb is communicated with MUT module under test cavity through reduction valve, low-pressure safety valve; On loading line, be separately installed with tensimeter and safety valve; Described vacuum workshop's part: it is indoor that MUT module under test is arranged on vacuum work, the pipeline of MUT module under test is connected with loading line through vacuum workshop's external part; Vacuum workshop is connected with helium mass spectrometer leak detector.
Described loading line, filtrator, gas bomb, high-pressure safety valve and low-pressure safety valve are arranged in testing table.
Described stop valve, reduction valve, tensimeter are arranged on outside testing table.
Described vacuum workshop is seal box; Seal box is fixed on testing table top by support.
The structure of described seal box is that cylindrical shell two ends are connected respectively fastening with flange, between cylindrical shell and flange, be provided with O-ring seal, be respectively equipped with and meet mouth I and meet mouth II on the flange at cylindrical shell two ends.
The described mouth I that connects is connected with helium mass spectrometer leak detector; The described mouth II that connects connects mouth by its aperture by MUT module under test pipeline external part and loading line on casing and is connected; The pipeline external part of described MUT module under test connects between mouth and is connected by flexible pipe with loading line; Fill with airtight and watertight padding in described MUT module under test pipeline external part and the gap connecing between mouth II internal diameter.
Described tensimeter is digital pressure gauge or pointer pressure, and tensimeter comprises blowout-back pressure gauge and low pressure gauge.
Described tensimeter is connected with impact damper or pressure transducer.
Described gas bomb supports latch assembly by steel cylinder and is fixed on testing table base plate.
The below of described testing table is provided with pin bracing frame, and testing table is provided with that loading line connects mouth, exhaust connects mouth and discharge line valve.
Advantageous effect of the present invention is as follows:
" interior pressurising, the outer vacuum " method that the invention provides detects technological equipment zero, assembly leak rate, is the structure that air-channel system and vacuum chamber unite two into one.Have: the data of leaking hunting are accurate, perfect in shape and function, stable performance, control convenience, energy-conserving and environment-protective, the advantage such as safe and reliable, its composition " interior pressurising, outer vacuum " leak detection system that is connected with helium mass spectrometer leak detector.The user's that utilization " the outer vacuum of the interior punching press " method of satisfying the demand is hunted leak to product needs, concerning prior art: realized breakthrough.
Accompanying drawing explanation
Fig. 1 is structural principle schematic diagram of the present invention.
Fig. 2 is inner structure schematic diagram of the present invention.
Fig. 3 is the A-A cross-sectional view of Fig. 2.
Fig. 4 is side structure schematic diagram of the present invention.
Fig. 5 is seal case structural representation of the present invention.
In figure: 1, seal box, 2, support, 3, flexible pipe, 4, hand stop valve, 5, loading line connects mouth, 6, low pressure gauge, 7, blowout-back pressure gauge, 8, pressure gauge base, 9, impact damper, 10, exhaust connects mouth, 11, pin bracing frame, 12, threeway, 13, gas bomb, 14, steel cylinder supports latch assembly, 15, base plate, 16, pipe fitting, 17, high-pressure safety valve, 18, discharge line valve, 19, reduction valve, 20, pipeline, 21, filtrator, 22, low-pressure safety valve, 23, leak locator, 101, meet mouth I, 102, flange, 103, cylindrical shell, 104, O-ring seal, 105, screw, 106, meet mouth II.
Embodiment
The present invention is with reference to following accompanying drawing, and details are as follows in conjunction with specific embodiments.
embodiment 1
As Figure 1-5, testing table comprises loading line and vacuum workshop's two parts; Described loading line part, loading line is communicated with gas bomb 13 by filtrator 21, high-pressure safety valve 17, hand stop valve 4; Helium in gas bomb connects mouth 5 by loading line and is connected with flexible pipe 3 through reduction valve 19, low-pressure safety valve 22, and flexible pipe 3 is communicated with MUT module under test steel pipe, and it is indoor that MUT module under test is arranged on vacuum work, and vacuum workshop is connected with helium mass spectrometer leak detector 23; Gas bomb 13 is connected with the air intake opening of reduction valve and is connected with low pressure line through reduction valve outlet, and low pressure gauge 6 and blowout-back pressure gauge 7 are installed on low pressure line; Blowout-back pressure gauge 7 and low pressure gauge 6 are connected with respectively impact damper 9 or pressure transducer; Described blowout-back pressure gauge 7 and low pressure gauge 6 are pointer pressure or digital pressure gauge.When selecting digital display manometer, pressure transducer will be arranged on the position of impact damper.
Described loading line 20, filtrator 21, gas bomb 13, high-pressure safety valve 17 and low-pressure safety valve 22 are arranged in testing table, and high-pressure safety valve 17 is connected with pipe fitting 16, and gas bomb supports latch assembly 14 by steel cylinder and is fixed on testing table base plate 15; Described hand stop valve 4, reduction valve 19, blowout-back pressure gauge 7 and low pressure gauge 6 are arranged on outside testing table.The below of testing table is provided with pin bracing frame 11, and testing table is provided with exhaust and connects mouth 10 and discharge line valve 18.
Described vacuum workshop is seal box; The structure of described seal box is, the two ends of cylindrical shell 103 are fastening with flange 102 respectively, between cylindrical shell 103 and flange, be provided with O-ring seal 104, on the flange at cylindrical shell two ends, be respectively equipped with and meet mouth I 101 and meet mouth II 106, the gap connecing between mouth II and MUT module under test steel pipe is provided with airtight and watertight padding vacuum cement.Seal box 1 is fixed on testing table top by support 2; Seal box 1 is connected with helium mass spectrometer leak detector 23 by meeting mouth I, when vacuumizing to casing, assembly is hunted leak; Seal box 1 is communicated with by pipeline the gas in gas bomb 13 by meeting mouth II with MUT module under test steel pipe.Pass the MUT module under test steel pipe that meets mouth II and by flexible pipe and loading line, connect mouth 5 and be connected, keep keeping certain pressure in the process of the inherent leak detection of assembly cavity.
To be the high-pressure helium (helium pressure in gas bomb bottle) that utilizes pressure to be 15MPa inflate in the assembly cavity of inflation to needing by reduction valve for pressurising in the present invention, outer vacuum leak hunting testing table, and keep the force value stipulated in cavity.To laying the vacuum chamber of MUT module under test, vacuumize, vacuum tightness must reach setting simultaneously, now also wants pressurize certain hour.When assembly cavity internal pressure is stabilized in setting, vacuum tank outlet vacuum tightness, reach setting and pressurize at the appointed time, read leak detection numerical value, compare with criterion.
To gas bomb, inflation needs through pipeline and pipe fittings such as pipeline, filtrator, safety valve, stop valves, and when gas bomb pressure reaches value, tensimeter shows numerical value, stops inflation, and hand stop valve cuts out.When needs gas bomb is inflated to MUT module under test, need process reduction valve, safety valve, flexible pipe to pressurising in MUT module under test cavity, tensimeter display module cavity internal pressure value.Seal case is connected with helium mass spectrometer leak detector, realizes the leak rate that detects MUT module under test when seal case is vacuumized.
Detection method is: 1) first, MUT module under test is placed in the casing of sealing, the mouth I that connects on tank ends flange is connected with leak locator; Sealed tube on MUT module under test passes and connects mouth 5 with loading line and be connected by meeting mouth II, and sealed tube external diameter and connect the gap lute in shutoff between mouth II internal diameter is filled with helium then to this assembly inner chamber, reaches authorised pressure value 0.2MPa; 2) after seal case sealing, with leak locator, seal case is vacuumized, reach setting and be less than 1Pa; 3) after pressurize to 10 minute, read the leak rate value on leak locator, contrast with criterion, determine that whether assembly is qualified.
Claims (10)
1. leak test platform, is characterized in that, testing table comprises loading line and vacuum workshop's two parts; Described loading line part: loading line is communicated with gas bomb by filtrator, high-pressure safety valve, stop valve; Gas bomb is communicated with MUT module under test cavity through reduction valve, low-pressure safety valve; On loading line, be separately installed with tensimeter and safety valve; Described vacuum workshop's part: it is indoor that MUT module under test is arranged on vacuum work, the pipeline of MUT module under test is connected with loading line through vacuum workshop's external part; Vacuum workshop is connected with helium mass spectrometer leak detector.
2. leak test platform according to claim 1, is characterized in that described loading line, filtrator, gas bomb, high-pressure safety valve and low-pressure safety valve are arranged in testing table.
3. leak test platform according to claim 1, is characterized in that described stop valve, reduction valve, tensimeter are arranged on outside testing table.
4. leak test platform according to claim 1, is characterized in that described vacuum workshop is seal box; Seal box is fixed on testing table top by support.
5. leak test platform according to claim 4, is characterized in that the structure of described seal box is, cylindrical shell two ends are connected respectively fastening with flange, between cylindrical shell and flange, be provided with O-ring seal, is respectively equipped with and meets mouth I and meet mouth II on the flange at cylindrical shell two ends.
6. leak test platform according to claim 5, is characterized in that the described mouth I that connects is connected with helium mass spectrometer leak detector; The described mouth II that connects connects mouth by its aperture by MUT module under test pipeline external part and loading line on casing and is connected; The pipeline external part of described MUT module under test connects between mouth and is connected by flexible pipe with loading line; Fill with airtight and watertight padding in described MUT module under test pipeline external part and the gap connecing between mouth II internal diameter.
7. leak test platform according to claim 1, is characterized in that described tensimeter is digital pressure gauge or pointer pressure, and tensimeter comprises blowout-back pressure gauge and low pressure gauge.
8. leak test platform according to claim 1, is characterized in that described tensimeter is connected with impact damper or pressure transducer.
9. leak test platform according to claim 1, is characterized in that described gas bomb supports latch assembly by steel cylinder and is fixed on testing table base plate.
10. leak test platform according to claim 1, is characterized in that the below of described testing table is provided with pin bracing frame, and testing table is provided with that loading line connects mouth, exhaust connects mouth and discharge line valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410257726.3A CN104006930A (en) | 2014-06-11 | 2014-06-11 | Leak detection test bed |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410257726.3A CN104006930A (en) | 2014-06-11 | 2014-06-11 | Leak detection test bed |
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| CN104006930A true CN104006930A (en) | 2014-08-27 |
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| CN201410257726.3A Pending CN104006930A (en) | 2014-06-11 | 2014-06-11 | Leak detection test bed |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105181267A (en) * | 2015-07-17 | 2015-12-23 | 武汉工程大学 | Device for testing leakage rate of bolted flange connection system |
| CN112595600A (en) * | 2020-12-14 | 2021-04-02 | 沈阳航天新光集团有限公司 | Gas-driven short-distance and remote control test system |
| CN112903206A (en) * | 2019-12-04 | 2021-06-04 | 国家能源投资集团有限责任公司 | Air tightness detection system and air tightness detection method |
| CN113029460A (en) * | 2021-02-03 | 2021-06-25 | 武汉英飞光创科技有限公司 | Leak detection method for optical device |
| US11209333B2 (en) | 2015-01-07 | 2021-12-28 | Homeserve Plc | Flow detection device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11209333B2 (en) | 2015-01-07 | 2021-12-28 | Homeserve Plc | Flow detection device |
| CN105181267A (en) * | 2015-07-17 | 2015-12-23 | 武汉工程大学 | Device for testing leakage rate of bolted flange connection system |
| CN105181267B (en) * | 2015-07-17 | 2018-06-08 | 武汉工程大学 | For testing the device of Bolted Flanged Connection system leak rate |
| CN112903206A (en) * | 2019-12-04 | 2021-06-04 | 国家能源投资集团有限责任公司 | Air tightness detection system and air tightness detection method |
| CN112595600A (en) * | 2020-12-14 | 2021-04-02 | 沈阳航天新光集团有限公司 | Gas-driven short-distance and remote control test system |
| CN113029460A (en) * | 2021-02-03 | 2021-06-25 | 武汉英飞光创科技有限公司 | Leak detection method for optical device |
| CN113029460B (en) * | 2021-02-03 | 2021-12-31 | 武汉英飞光创科技有限公司 | Leak detection method for optical device |
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Application publication date: 20140827 |
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