CN111999013B - Diaphragm gas tightness detection device - Google Patents
Diaphragm gas tightness detection device Download PDFInfo
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- CN111999013B CN111999013B CN202010926069.2A CN202010926069A CN111999013B CN 111999013 B CN111999013 B CN 111999013B CN 202010926069 A CN202010926069 A CN 202010926069A CN 111999013 B CN111999013 B CN 111999013B
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- pressure maintaining
- air
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- pressure
- plate
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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
- G01M3/26—Investigating 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention belongs to the field of diaphragm air tightness detection, in particular to a diaphragm air tightness detection device, which aims at solving the problems that the existing diaphragm air tightness is inconvenient to detect and the working efficiency is reduced. The invention can carry out air tightness detection on the diaphragm before the galvanic pile is installed, detect unqualified diaphragms in advance and improve the working efficiency.
Description
Technical Field
The invention relates to the technical field of membrane air tightness detection, in particular to a membrane air tightness detection device.
Background
The flow battery is a high-performance energy storage battery and has the characteristics of high capacity, long service life, safety, environmental protection and the like. The thickness of diaphragm generally all is tens microns, and is very thin, all probably causes the diaphragm to damage at processing or in-process such as tailorring, transportation, and to some obvious damages, naked eye often can detect out, nevertheless often hardly discovers to defect naked eyes such as some very tiny gas pockets, in case adorn the pile, will cause the pile to cluster liquid, influences the performance of pile, tears the pile again and trades the diaphragm, can greatly increased work load. The membrane air tightness detection device designed by the invention can detect the air tightness of the membrane before the galvanic pile is installed, detect the unqualified membrane in advance and improve the working efficiency. There is no disclosure in the prior art of this technical problem.
Disclosure of Invention
The invention aims to solve the defects that the air tightness of a diaphragm is inconvenient to detect and the working efficiency is reduced in the prior art, and provides an air tightness detecting device for the diaphragm.
In order to achieve the purpose, the invention adopts the following technical scheme:
a membrane gas tightness detection device comprising: the pressure maintaining assembly (2) comprises a plurality of diaphragm detection units, each diaphragm detection unit sequentially comprises a pressure maintaining plate (23), a buffer cushion block (22), a sealing gasket (24), a buffer cushion block (22) and a pressure maintaining plate (23), a diaphragm (25) to be detected is arranged between the two sealing gaskets when the diaphragm detection assembly is detected, the pressure maintaining assembly further comprises two end plates (21), the pressure maintaining plate (23) is a plate body (231), grooves are symmetrically formed in the plate body (231) from two sides inwards, the grooves serve as pressure maintaining cavities (232), one end face of the plate body (231) is provided with an exhaust hole (233) and an air inlet hole (234), the exhaust hole (233) is communicated with one pressure maintaining cavity (232), and the air inlet hole (234) is communicated with the other pressure maintaining cavity (232); a press (1) for pressing the pressure maintaining assembly (2) to a suitable extent; the detection assembly (3) feeds air to each diaphragm detection unit of the pressure maintaining assembly (2) through a plurality of air pipes (5) and detects the air pressure of the diaphragm detection units.
Preferably, the end plate is made of one of aluminum, iron or a plastic plate.
Preferably, the cushion block is made of a porous medium compressible material.
Preferably, the material of the pressure maintaining plate is plastic.
Preferably, the sealing gasket is made of rubber and has a thickness of 1-2 mm.
Preferably, the size of the cushion block is consistent with that of the pressure-maintaining cavity.
Preferably, the detection assembly is in contact with the top of the trolley.
Preferably, the two holding pressure chambers are arranged symmetrically.
The invention relates to a diaphragm air tightness detection device, which firstly completes the assembly of the whole pressure maintaining device on a working table of a press machine, the assembly sequence of the pressure maintaining device is that firstly, a cushion pad block and a pressure maintaining plate are pre-assembled in advance to form a pressure maintaining component, then, an end plate, the pressure maintaining component, a sealing gasket, a diaphragm, the sealing gasket, the pressure maintaining component and the end plate are sequentially stacked, the pressure maintaining unit is a diaphragm, can detect a diaphragm, if a plurality of diaphragms are required to be detected simultaneously, only the two end plates are sequentially stacked according to the stacking sequence, after the assembly of the pressure maintaining device is completed, the pressure maintaining device is pressed to a designed theoretical value by the press machine to perform pressure maintaining, then, a detection component is placed on a trolley, the detection component is connected with the pressure maintaining component through an air pipe, one end of the air pipe is directly connected with a thread of the pressure maintaining device, and the other end of the air pipe is connected with an air outlet of the detection component, forming a detection channel, when the diaphragm is detected, turning off all the handle valves, making external air source be fed into detection component by means of air inlet, regulating pressure-regulating valve to make its pressure value be in set range, turning on all the handle valves to make the air pressure of air pressure sensor with display be stable in set value, turning off all the handle valves, at this moment starting detection, in the defined pressure-holding time checking to see that the reading change on the air pressure sensor with display is in defined range, if it is in defined change range, the air tightness of the diaphragm is good, and the diaphragm is qualified, if the diaphragm has the defects of air hole, etc., the air can be passed through the air hole of diaphragm, and leaked out through the air hole of pressure-holding plate, so that the reading change of air pressure sensor with display is greater than defined value, the diaphragm is disqualified, said equipment can simultaneously implement detection of several diaphragms, and its detection speed is quick, the detection efficiency of the diaphragm is greatly improved, whether the diaphragm leaks air or not can be quickly and effectively detected, false detection caused by naked eye detection is avoided, and the working efficiency is improved.
The invention can detect the air tightness of the diaphragm before the galvanic pile is installed, detect the unqualified diaphragm in advance and improve the working efficiency.
Drawings
FIG. 1 is a schematic structural diagram of a device for detecting gas tightness of a diaphragm according to the present invention;
FIG. 2 is an exploded view of a pressure maintaining assembly of the air tightness detecting device for a diaphragm according to the present invention;
FIG. 3 is a schematic structural diagram of a pressure maintaining plate portion of a device for detecting gas tightness of a diaphragm according to the present invention;
FIG. 4 is a schematic structural diagram of an appearance of a detecting assembly of the air tightness detecting device for a diaphragm according to the present invention;
FIG. 5 is a schematic diagram of an internal structure of a detecting assembly of the air tightness detecting device for a diaphragm according to the present invention;
FIG. 6 is a single channel detection diagram inside the detection assembly of the membrane air tightness detection device provided by the invention.
In the figure: 1. a press machine; 2. a pressure maintaining device; 21. an end plate; 22. buffering cushion blocks; 23. a pressure maintaining plate; 231. a plate body; 232. a pressure maintaining cavity; 233. an exhaust hole; 234. an air inlet; 24. sealing gaskets; 25. a diaphragm; 26. straight-through thread; 27. a pressure maintaining component; 3. a detection component; 31. a housing; 32. air exhaust; 33. a hand valve; 34. an air inlet; 35. a barometric sensor with a display; 36. an air outlet; 37. a pressure regulating valve; 38. a gas distribution pipe; 4. a trolley; 5. the trachea.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-6, a diaphragm air tightness detection device comprises a press machine 1, a pressure maintaining device 2, a detection assembly 3, a trolley 4 and an air pipe 5. The pressure maintaining device 2 comprises two end plates 21, a plurality of cushion pads 22, a plurality of pressure maintaining plates 23, a plurality of sealing gaskets 24 and a plurality of diaphragms 25, wherein the pressure maintaining plates and the cushion pads 22 on the two sides form a pressure maintaining assembly 27. The pressure maintaining plate 23 comprises a plate body 231, pressure maintaining cavities 232 are formed in the top and the bottom of the plate body 231, an exhaust hole 233 and an air inlet hole 234 are formed in one side of the plate body 231, the exhaust hole 233 is communicated with one pressure maintaining cavity 232, the air inlet hole 234 is communicated with the other pressure maintaining cavity 232, and the air inlet hole 234 is fixedly connected with a threaded through hole 26. The assembly sequence of the pressurizer 2 is: firstly, the cushion block 22 and the pressure maintaining plate 23 are preassembled in advance to form the pressure maintaining assembly 27, and then the end plate 21, the pressure maintaining assembly 27, the sealing gasket 24, the diaphragm 25, the sealing gasket 24, the pressure maintaining assembly 27 and the end plate 21 are sequentially stacked. The above is a pressure holding means for one piece of the diaphragm 25, and one piece of the diaphragm 25 can be detected. If a plurality of diaphragms 25 need to be detected simultaneously, the diaphragms are only required to be sequentially stacked between the two end plates 21 according to the stacking sequence.
The detection component 3 comprises a shell 31, an air exhaust 32, a hand valve 33, an air inlet 34, an air pressure sensor 35 with a display, an air outlet 36 and a pressure regulating valve 37, the detection component 3 is connected with the pressure maintaining component 2 through an air pipe 5, one end of the air pipe 5 is connected with the thread through 26 of the pressure maintaining device 2, and the other end of the air pipe 5 is connected with the air outlet 36 of the detection component 3.
In the present invention, the end plate 21 is made of one of aluminum, iron, and plastic plates.
In the present invention, the cushion block 22 is made of a porous medium compressible material.
In the present invention, the material of the pressure retention plate 23 is plastic.
In the invention, the sealing gasket 24 is made of rubber and has a thickness of 1-2 mm.
In the present invention, the cushion pad 22 has a size identical to that of the pressure holding chamber 232.
In the present invention, the detection unit 3 is in contact with the top of the carriage 4.
In the present invention, the two pressure retention chambers 232 are symmetrically disposed.
When the pressure maintaining device 2 is used, the whole pressure maintaining device 2 is assembled on the workbench of the press machine 1, and the assembling sequence of the pressure maintaining device 2 is that the cushion block 22 and the pressure maintaining plate 23 are preassembled in advance to form the pressure maintaining assembly 27, and then the end plate 21, the pressure maintaining assembly 27, the sealing gasket 24, the diaphragm 25, the sealing gasket 24, the pressure maintaining assembly 27 and the end plate 21 are sequentially stacked. The pressure maintaining unit with one diaphragm 25 can detect one diaphragm 25, and if a plurality of diaphragms 25 need to be detected simultaneously, the diaphragms are stacked in sequence between the two end plates 21 according to the stacking sequence. After the pressure maintaining device 2 is assembled, the pressure maintaining device 2 is pressed to a designed theoretical value through the press machine 1 for pressure maintaining, then the detection assembly 3 is placed on the trolley 4, the detection assembly 3 is connected with the pressure maintaining device 2 through the air pipe 5, one end of the air pipe 5 is connected with the thread through 26 of the pressure maintaining device 2, and the other end of the air pipe 5 is connected with the air outlet 36 of the detection assembly 3, so that a detection channel is formed. When the diaphragm 25 is detected, the handle valve 33 is completely closed, an external air source enters the detection assembly 3 through the air inlet 34, the pressure regulating valve 37 is adjusted to make the pressure value within a set range, the handle valve 33 is completely opened to make the air pressure of the air pressure sensor 35 with display completely stabilized at a set value, the handle valve 33 is completely closed, at this time, detection is started, and whether the change of the reading on the air pressure sensor 35 with display is within a set range or not is checked within a set pressure maintaining time. If the variation is within the predetermined variation range, the airtightness of the separator 25 is good, and the separator 25 is acceptable. If there is a defect such as a gas hole in the diaphragm 25, gas leaks out through the gas hole of the diaphragm 25 and then through the gas hole 233 in the pressure-retaining plate 23, causing a change in the reading of the pressure sensor 35 with display exceeding a prescribed value. The device can accomplish the detection of polylith diaphragm simultaneously to detection speed is fast, has improved the detection efficiency of diaphragm greatly, can whether leak gas by quick effectual detection diaphragm, avoids the false retrieval that the naked eye detected and causes, improves work efficiency.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. A membrane gas tightness detection device, characterized by comprising:
the pressure maintaining device (2) comprises a plurality of diaphragm detection units, and each diaphragm detection unit sequentially comprises a pressure maintaining plate (23), a buffer cushion block (22) and a sealing gasket (24); the diaphragm detection device comprises sealing gaskets (24), a buffer cushion block (22) and a pressure maintaining plate (23), wherein a diaphragm (25) to be detected is arranged between the two sealing gaskets during detection; the buffer cushion block (22) is made of a porous medium compressible material; the pressure maintaining device further comprises two end plates (21), the pressure maintaining plate (23) is a plate body (231), grooves are symmetrically formed inwards from two surfaces of the plate body (231) and serve as pressure maintaining cavities (232), one end face of the plate body (231) is provided with an exhaust hole (233) and an air inlet hole (234), the exhaust hole (233) is communicated with one pressure maintaining cavity (232), the air inlet hole (234) is communicated with the other pressure maintaining cavity (232), the pressure maintaining plate (23) and buffer cushion blocks (22) on two sides form a pressure maintaining assembly, and the size of each buffer cushion block (22) is identical to that of the corresponding pressure maintaining cavity (232);
a press (1) for pressing the pressurizer (2) to a suitable degree;
the detection component (3) feeds air to each diaphragm detection unit of the pressurizer (2) through a plurality of air pipes (5) and detects the air pressure of the diaphragm detection units; the detection assembly comprises:
an air inlet (34) communicated to the air exhaust (32), and a pressure regulating valve (37) arranged between the air inlet and the air exhaust;
a gas vent (32) for delivering gas to the diaphragm sensing unit through a plurality of gas distribution tubes (38);
a hand valve (33) provided on each air distribution pipe (38);
and the air pressure sensor (35) is arranged on each air distribution pipe (38) and is positioned between the hand valve (33) and the air outlet (36) of the air distribution pipe, and the air pipe (5) is connected between the air outlet (36) and the air inlet (234) of the pressure maintaining plate.
2. The membrane gas tightness detection device according to claim 1, characterized in that said detection assembly further comprises a housing (31).
3. The membrane gas-tightness detection device according to claim 1, characterized in that the end plate (21) is made of one of aluminum, iron or plastic plate.
4. The membrane gas tightness detection device according to claim 1, characterized in that the material of the pressure retention plate (23) is plastic.
5. The membrane gas-tightness detection device according to claim 1, characterized in that the material of said sealing gasket (24) is rubber, and the thickness is 1-2 mm.
6. The membrane gas-tightness detection device according to claim 1, characterized in that said press (1) comprises a table on which said pressure-maintaining means are placed.
7. The membrane gas-tightness detection device according to claim 6, characterized in that it further comprises a trolley (4) with a height matching with the worktable, said detection device being placed on said trolley.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010926069.2A CN111999013B (en) | 2020-09-07 | 2020-09-07 | Diaphragm gas tightness detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010926069.2A CN111999013B (en) | 2020-09-07 | 2020-09-07 | Diaphragm gas tightness detection device |
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| CN111999013A CN111999013A (en) | 2020-11-27 |
| CN111999013B true CN111999013B (en) | 2022-08-19 |
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| CN202010926069.2A Active CN111999013B (en) | 2020-09-07 | 2020-09-07 | Diaphragm gas tightness detection device |
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| CN116929668B (en) * | 2023-09-19 | 2023-12-15 | 南方科技大学 | Detection device and detection processing method for detecting flow battery diaphragm |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6494082B1 (en) * | 1998-06-17 | 2002-12-17 | Kunitaka Mizobe | Method of and apparatus for testing airtightness of closed space provided with steam movement control device |
| CN101174693A (en) * | 2006-10-30 | 2008-05-07 | 江苏华源氢能科技发展有限公司 | Fuel cell membrane electrode and double-polar plate gas leakage checking device |
| CN102297748A (en) * | 2010-06-25 | 2011-12-28 | 中国科学院大连化学物理研究所 | Leakage testing device for film and testing method |
| CN102087161B (en) * | 2010-11-25 | 2012-09-12 | 新源动力股份有限公司 | Water jacket tightness detection device and method for bipolar plate of fuel cell |
| CN103063375A (en) * | 2012-12-21 | 2013-04-24 | 新源动力股份有限公司 | On-line testing method for studying fuel cell stack assembly force and sealing |
| CN104006933A (en) * | 2014-05-16 | 2014-08-27 | 江苏绿遥燃料电池***制造有限公司 | Quick leak detecting device of fuel battery bipolar plates |
| CN105514530B (en) * | 2015-12-29 | 2018-03-16 | 国联汽车动力电池研究院有限责任公司 | Cell lamination, lithium air secondary battery unit and its assemble method |
| CN108548642B (en) * | 2018-04-03 | 2019-12-06 | 武汉轻工大学 | Leak detection air supply device and proton exchange membrane fuel cell assembly leak detection equipment |
| CN109167083B (en) * | 2018-10-29 | 2023-11-14 | 深圳市南科燃料电池有限公司 | Bipolar plate and membrane electrode leakage detection device comprising bipolar plate |
| CN109301286A (en) * | 2018-11-21 | 2019-02-01 | 新源动力股份有限公司 | A kind of fuel battery double plates assembly area device for detecting sealability and detection method |
| CN109406065B (en) * | 2019-01-04 | 2021-11-19 | 重庆新知创科技有限公司 | Air tightness detection device for square-shell lithium battery shell |
| CN214538409U (en) * | 2021-04-29 | 2021-10-29 | 上海申风投资管理有限公司 | Air tightness detection device of fuel cell MEA |
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Inventor after: Li Dianhong Inventor after: Zhang Qian Inventor after: Shi Xiaohu Inventor after: Xiong Jianxin Inventor after: Zhu Xianfa Inventor before: Li Dianhong Inventor before: Zhang Qianshi Inventor before: Shi Xiaohu Inventor before: Xiong Jianxin Inventor before: Zhu Xianfa |
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