CN104989948A - Quantitative leakage detection device of cylinder group and method - Google Patents
Quantitative leakage detection device of cylinder group and method Download PDFInfo
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- CN104989948A CN104989948A CN201510328663.0A CN201510328663A CN104989948A CN 104989948 A CN104989948 A CN 104989948A CN 201510328663 A CN201510328663 A CN 201510328663A CN 104989948 A CN104989948 A CN 104989948A
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Abstract
The invention discloses a quantitative leakage detection device of a bottle group, which is characterized in that the quantitative leakage detection device is in sealing connection with a to-be-detected bottle group, and comprises a first balancing cavity, a communication component, a second balancing cavity, a differential pressure gauge and an evacuating device; the first balancing cavity is provided with an opening; the to-be-detected bottle group stretches into the first balancing cavity from the opening; the outer wall of the to-be-detected bottle group is in sealing connection with a contacting part of the opening; the differential pressure gauge is connected with the two balancing cavities, and used for measuring pressure differences in the two balancing cavities; the evacuating device is connected with the communication component, and can evacuate the first balancing cavity and the second balancing cavity to vacuum simultaneously; the communication component comprises a first conduit communicated with the first balancing cavity and a second conduit communicated with the second balancing cavity; a first switch is arranged between the first conduit and the second conduit; the first conduit and the second conduit are connected with the evacuating device by a header pipe; and a second switch is arranged on the header pipe. The applicable environmental requirements of the quantitative leakage detection device are low, the gas leakage amount of the to-be-detected bottle group can be measured quickly, effectively and quantitatively, and the quantitative leakage detection device is low in error, safe and reliable.
Description
Technical field
The invention belongs to leak detecting device field, especially relate to a kind of inspection instrument valve and with the container joint whether closely quantitative leak-checking apparatus of bottle group and method.
Background technique
The leakage rate of vessel valve measures the processing technology and mounting process that are often used to control container and valve, causes the principal element that bottle group is leaked to be: 1, bottle group is connected unreliable causing and occurs leaking with the joint of vessel valve; 2, the quality of vessel valve self product is unreliable, there is leakage point.
Traditional bottle group leak hunting method whole bottle group is put into pond to hunt leak by observing bubble, but this process only relies on and visually observes leak detection thus qualitative detection, concrete quantitative measurment leakage rate cannot be realized, and be immersed in bottle group in water for a long time and can be corroded.More domestic fire-fighting enterprises also have to adopt whole bottle group to cover and vacuumize, and the gas leaked by instrument timed collection also detects its gas componant to judge, but its process costs is higher, is suitable only for and measures the less bottle group of volume.Patent CN202091774 discloses a kind of quantitative leak-checking apparatus of extinguishing agent bottle group, this leak-checking apparatus quantitatively can detect the leakage rate of bottle outlet group rapidly, but there is following problems in it: 1, in air, temperature variation can cause effect of expanding with heat and contract with cold, testing precision is had an impact, there is larger error, therefore need to put into constant temperature laboratory to detect, be unfavorable for the detection of job site; 2, adopt the mounting type be threaded, vessel valve press seal circle seals, not easily to detection device stationary positioned.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of structure simple, can the quantitative leak-checking apparatus of bottle group of Quantitative detection bottle group leakage rate and method.
The technical solution adopted for the present invention to solve the technical problems is: the quantitative leak-checking apparatus of a kind of bottle of group, be sealedly connected in tested bottle group, described quantitative leak-checking apparatus comprise the first balance cavity, communication means, to balance by this communication means and first that cavity is communicated with second balance cavity, differential pressure takes into account vacuum pumping device, described first balance cavity has opening, tested bottle group stretches in the first balance cavity from opening, and outer wall and the openings contact part of tested bottle group are tightly connected; Differential manometer connects the first balance cavity and the second balance cavity respectively, for measuring the pressure difference in two balance cavitys; Vacuum pumping device balances cavity and second respectively by communication means and balances cavity and be communicated with first, for the first balance cavity and the second balance cavity are evacuated to vacuum; Described communication means comprises connection first and balances the first conduit of cavity and the second conduit being communicated with the second balance cavity, the first switch is provided with between described first conduit and the second conduit, first conduit is connected with vacuum pumping device by house steward with the second conduit, and house steward is provided with second switch.First balance cavity is connected with tested bottle group negative-pressure adsorption, connect not only simple but also tight fast, sealing is better, first balance cavity and the second balance cavity are the impact of expanding with heat and contract with cold that vacuum state reduces that variation of ambient temperature causes, reduce the error of measurement, the requirement of measurement environment is reduced.Just the first balance cavity and the second balance cavity can be vacuumized by a vacuum pumping device simultaneously, ensure that the first balance cavity is identical degree of vacuum with the second balance cavity, namely there is identical initial negative pressure value.Differential manometer can demonstrate the pressure difference between the first balance cavity and the second balance cavity intuitively, thus fast quantification measures the leakage rate of gas in the first balance cavity.The setting of the first switch and second switch, achieves the partition in the negative pressure value and test process that in control two balance cavity, initial phase is same.
Further, the second balance cavity is located at the periphery of the first balance cavity, and the bottom negative-pressure adsorption of this second balance cavity is connected to the outer wall of the first balance cavity.Connected by negative-pressure adsorption between first balance cavity and the second balance cavity, connect more tight, sealing is guaranteed.
Further, the second balance cavity is located at the periphery of the first balance cavity, is bolted on the outer wall of the first balance cavity.
Further, the second balance cavity is located at the periphery of the first balance cavity, with the first counter balance pocket body by integral forming.
Further, the first balance cavity and the second balance cavity are independently arranged.
Further, tested bottle group and the first attachment portion balancing cavity are provided with Sealing.Sealing makes sealing between the first balance cavity and tested bottle group reliable.
Further, Sealing is O type seal ring.
Further, vacuum means is set to extraction pump.
Present invention also offers a kind of leak detection method utilizing the quantitative leak-checking apparatus of above-mentioned bottle group to measure bottle group leakage rate, comprise the following steps:
1) quantitative leak-checking apparatus is covered in above the tested bottle group with vessel valve, open differential manometer, extraction pump is connected on house steward, open the first switch and second switch, start extraction pump and the first balance cavity and the second balance cavity are vacuumized simultaneously;
2) first close second switch, then close the first switch;
3) tested bottle group Leakage Gas causes pressure in the first balance cavity to increase, and differential manometer produces deflection;
4) balance the pressure difference between cavity and the second balance cavity according to the deflection numerical measuring first that differential manometer shows, quantitatively calculate the leakage rate of tested bottle group.
The invention has the beneficial effects as follows, structure is simple, and it is convenient to install, and suitable environment requires low, and fast and effeciently quantitative measurment can go out the quantity of gas leakage of tested bottle group, safe and reliable, error is little.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is structural representation of the present invention.
Fig. 2 is part section structural representation of the present invention.
Fig. 3 is fundamental diagram of the present invention.
Embodiment
Better the present invention program is understood in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, clear, complete description is carried out to the technological scheme in inventive embodiments, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.
Embodiment 1
Shown in seeing figures.1.and.2, the quantitative leak-checking apparatus of a kind of bottle of group, covers on the top of tested bottle group 1, and this quantitative leak-checking apparatus comprises the first balance cavity 2, communication means, the second balance cavity 3, differential manometer 4 and vacuum pumping device.First balance cavity 2 is hollow circuit cylinder body structure, its one end has opening, tested bottle group 1 stretches in the first balance cavity 2 from this opening, thus the vessel valve 11 of tested bottle group 1 is positioned at the first balance cavity 2, the first balance opening of cavity 2 and the outer wall of tested bottle group 1 are tightly connected, thus form airtight space between the first balance cavity 2 and tested bottle group 1.Second balance cavity 3 is located at the periphery of the first balance cavity 2, and namely the outer wall of the first balance cavity 2 is the inwall of the second balance cavity 3, and the outer wall of the second balance cavity 3 has the forge piece of step type structure of inwardly shrinking, and its lower end also has the opening stretched into for tested bottle group 1.The end face of the first balance cavity 2 and the second balance cavity 3 is in same level, the top position being positioned at the first balance cavity 2 outer wall at end face is provided with differential manometer 4, and two pressure passages on differential manometer 4 i.e. the first pin 41 and the second pin 42 balance cavity 2 and second respectively and balance cavity 3 and be communicated with first.Same is provided with communication means at end face near the top position of the first balance cavity 2 outer wall, this communication means comprises the first conduit 51 be outwardly communicated with from the first balance cavity 2 and the second conduit 52 be outwardly communicated with from the second balance cavity 3, first conduit 51 and the second conduit 52 are connected by house steward 54 again and are connected with vacuum pumping device, thus just the first balance cavity 2 and the second balance cavity 3 can be vacuumized simultaneously with a vacuum pumping device, namely between the first balance cavity 2 and the second balance cavity 3, there is the identical negative pressure of identical degree of vacuum.Be provided with the first switch 53 that the connected sum for controlling between the first balance cavity 2 and the second balance cavity 3 is closed between first conduit 51 and the second conduit 52, house steward 54 is provided with and balances for controlling the first balance cavity 2 and second second switch 55 that cavity 3 is in communication with the outside relation.This concrete communication means can be two valve treble ported slide valves.When after the air that vacuum pumping device is extracted out in the first balance cavity 2 and the second balance cavity 3, because ambient atmos pressure is greater than internal gas pressure, the lower openings place of the first balance cavity 2 adsorbs with the outer wall of tested bottle group 1 and is connected, Sealing 6 can be set in tested bottle group 1 and the first balance cavity 2 contact-and-connection portion to increase tightness, in the present embodiment, Sealing 6 is O type seal ring, and the outer wall that the lower openings place and first of the second balance cavity 3 balances cavity 2 adsorbs and is connected.Extraction pump is set to vacuum means in the present embodiment.
With reference to shown in Fig. 3, when a measurement is taken, quantitative leak-checking apparatus is covered on the top of tested bottle group 1 with vessel valve 11 side, open differential manometer 4, extraction pump is connected on house steward 54, open the first switch 53 and second switch 55, starting extraction pump is discharged in air by the first balance cavity 2 and the second balance cavity 3 internal gas through communication means, second switch 55 is first closed after two balance cavitys are evacuated to the degree of vacuum of setting, close the first switch 53 again, due to atmospheric effect, whole quantitative leak-checking apparatus is tightly adsorbed on tested bottle group 1 outer wall.In measuring phase, when there is leakage in bottle group, first balance cavity 2 can cause its internal pressure to increase due to the gas leaked, form the pressure difference between the first balance cavity 2 and the second balance cavity 3, differential manometer 4 demonstrates this pressure difference, draw the leakage rate of tested bottle group 1 because leaking the pressure change coefficient caused according to tested bottle group 1, these computational methods are prior art, repeat no more.
Embodiment 2
The difference of the present embodiment and embodiment 1 is, the outer wall top of the first balance cavity 2 is provided with outside thread, second balance cavity 3 is that upper end is with the hollow cylindrical structure inwardly shrinking ledge structure, its convex edge is provided with screw thread, top and first top balancing cavity 2 of the second balance cavity 3 are spirally connected, the bottom negative-pressure adsorption of the second balance cavity 3 forms airtight space on the outer wall of the first balance cavity 2, same, the bottom of the second balance cavity 3 also can be screwed onto on the outer wall of the first balance cavity 2.Other content is identical with embodiment 1 to be repeated no more.
Embodiment 3
The difference of the present embodiment and embodiment 1 is, the second balance cavity 3 and first balances the periphery that cavity 2 is fixedly connected on the first balance cavity 2 one-body moldedly, and the second balance cavity 3 can be the seal container in arbitrary shape.
Embodiment 4
The difference of the present embodiment and embodiment 1 is, the second balance cavity 3 is for being different from the first balance cavity 2, the seal container of separate existence with it, and it can be arranged in arbitrary shape.
Above-mentioned embodiment is used for explaining and the present invention is described, instead of limits the invention, and in the protection domain of spirit of the present invention and claim, any amendment make the present invention and change, all fall into protection scope of the present invention.
Claims (9)
1. the quantitative leak-checking apparatus of a bottle group, be sealedly connected on tested bottle group (1), it is characterized in that: described quantitative leak-checking apparatus comprise the first balance cavity (2), communication means, to balance by this communication means and first that cavity (2) is communicated with second balance cavity (3), differential manometer (4) and vacuum pumping device, described first balance cavity (2) has opening, tested bottle group (1) is stretched in the first balance cavity (2) from opening, and outer wall and the openings contact part of tested bottle group (1) are tightly connected; Differential manometer (4) connects the first balance cavity (2) and the second balance cavity (3) respectively, for measuring the pressure difference in two balance cavitys; Vacuum pumping device balances cavity (2) and second respectively by communication means and balances cavity (3) and be communicated with first, be evacuated to vacuum for the first balance cavity (2) and second are balanced cavity (3); Described communication means comprises connection first and balances first conduit (51) of cavity (2) and the second conduit (52) being communicated with the second balance cavity (3), the first switch (53) is provided with between described first conduit (51) and the second conduit (52), first conduit (51) is connected with vacuum pumping device by house steward (54) with the second conduit (52), and house steward (54) is provided with second switch (55).
2. the quantitative leak-checking apparatus of bottle group according to claim 1, it is characterized in that: described second balance cavity (3) is located at the periphery of the first balance cavity (2), the bottom negative-pressure adsorption of this second balance cavity (3) is connected to the outer wall of the first balance cavity (2).
3. the quantitative leak-checking apparatus of bottle group according to claim 1, is characterized in that: described second balance cavity (3) is located at the periphery of the first balance cavity (2), is bolted on the outer wall of the first balance cavity (2).
4. the quantitative leak-checking apparatus of bottle group according to claim 1, is characterized in that: described second balance cavity (3) is located at the periphery of the first balance cavity (2), and to balance cavity (2) one-body molded with first.
5. the quantitative leak-checking apparatus of bottle group according to claim 1, is characterized in that: described first balance cavity (2) and the independent setting of the second balance cavity (3).
6. the quantitative leak-checking apparatus of bottle group according to claim 1, is characterized in that: described tested bottle group (1) and the first attachment portion balancing cavity (2) are provided with Sealing (6).
7. the quantitative leak-checking apparatus of bottle group according to claim 6, is characterized in that: described Sealing (6) is O type seal ring.
8. the quantitative leak-checking apparatus of bottle group according to claim 1, is characterized in that: described vacuum means is set to extraction pump.
9. utilize a leak detection method for the quantitative leak-checking apparatus of the bottle group described in any one of claim 1-8, it is characterized in that comprising the following steps:
Quantitative leak-checking apparatus is covered in tested bottle group (1) top with vessel valve (11), open differential manometer (4), extraction pump is connected on house steward (54), open the first switch (53) and second switch (55), start extraction pump and the first balance cavity (2) and the second balance cavity (3) are vacuumized simultaneously;
First close second switch (55), then close the first switch (53);
Tested bottle group (1) Leakage Gas causes the interior pressure of the first balance cavity (2) to increase, and differential manometer (4) produces deflection;
Balance the pressure difference between cavity (2) and the second balance cavity (3) according to the deflection numerical measuring first of the upper display of differential manometer (4), quantitatively calculate the leakage rate of tested bottle group (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510328663.0A CN104989948B (en) | 2015-06-15 | 2015-06-15 | The quantitative leak-checking apparatus and method of bottle group |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510328663.0A CN104989948B (en) | 2015-06-15 | 2015-06-15 | The quantitative leak-checking apparatus and method of bottle group |
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| CN104989948A true CN104989948A (en) | 2015-10-21 |
| CN104989948B CN104989948B (en) | 2017-07-21 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109578809A (en) * | 2018-12-29 | 2019-04-05 | 武汉格罗夫氢能汽车有限公司 | A kind of leakage monitor applied to hydrogen-feeding system |
| CN112082090A (en) * | 2019-09-18 | 2020-12-15 | 朴成浩 | Leakage detection and explosion-proof heat preservation device for ultralow-temperature liquefied gas storage tank |
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| JPH11237300A (en) * | 1998-02-20 | 1999-08-31 | Ishikawajima Inspection & Instrumentation Co | Drum can leakage inspection device due to differential pressure method |
| CN101587006A (en) * | 2009-06-18 | 2009-11-25 | 齐诺精密系统自动化(天津)有限公司 | Air tightness detecting system used for lithium battery and detecting method thereof |
| JP4821553B2 (en) * | 2006-10-12 | 2011-11-24 | 三菱電機株式会社 | Leak inspection device |
| CN202091774U (en) * | 2011-05-13 | 2011-12-28 | 浙江信达可恩消防实业有限责任公司 | Quantitative leakage detection device for extinguishant bottle set |
| CN103822761A (en) * | 2014-01-03 | 2014-05-28 | 中国空间技术研究院 | Sealing detection apparatus and method |
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2015
- 2015-06-15 CN CN201510328663.0A patent/CN104989948B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11237300A (en) * | 1998-02-20 | 1999-08-31 | Ishikawajima Inspection & Instrumentation Co | Drum can leakage inspection device due to differential pressure method |
| JP4821553B2 (en) * | 2006-10-12 | 2011-11-24 | 三菱電機株式会社 | Leak inspection device |
| CN101587006A (en) * | 2009-06-18 | 2009-11-25 | 齐诺精密系统自动化(天津)有限公司 | Air tightness detecting system used for lithium battery and detecting method thereof |
| CN202091774U (en) * | 2011-05-13 | 2011-12-28 | 浙江信达可恩消防实业有限责任公司 | Quantitative leakage detection device for extinguishant bottle set |
| CN103822761A (en) * | 2014-01-03 | 2014-05-28 | 中国空间技术研究院 | Sealing detection apparatus and method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109578809A (en) * | 2018-12-29 | 2019-04-05 | 武汉格罗夫氢能汽车有限公司 | A kind of leakage monitor applied to hydrogen-feeding system |
| CN109578809B (en) * | 2018-12-29 | 2024-02-06 | 武汉格罗夫氢能汽车有限公司 | Leakage monitoring device applied to hydrogen supply system |
| CN112082090A (en) * | 2019-09-18 | 2020-12-15 | 朴成浩 | Leakage detection and explosion-proof heat preservation device for ultralow-temperature liquefied gas storage tank |
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| CN104989948B (en) | 2017-07-21 |
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