CN111912583A - Leakage detection device for membrane electrode of galvanic pile - Google Patents
Leakage detection device for membrane electrode of galvanic pile Download PDFInfo
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Abstract
The invention provides a leak detection device for a membrane electrode of a galvanic pile, which is used for leak detection of the membrane electrode of the galvanic pile, wherein the membrane electrode of the galvanic pile is provided with a first chamber and two groups of second chambers, the first chamber comprises an upper chamber and a lower chamber, and the device comprises: the device comprises a vacuum box, a clamp, a leak detection pipeline, a first connecting pipeline, a second connecting pipeline, a valve group, a leak detector and a vacuum pump for vacuumizing a cavity; the leak detection pipeline is used for communicating the interior of the vacuum box with one group of the second chamber, the upper chamber and the lower chamber; the second connecting pipeline respectively penetrates through the clamp to be communicated with the lower chamber and the two groups of second chambers; the valve group comprises a plurality of valves for controlling the on-off of the first connecting pipeline, the second connecting pipeline and the leakage detection pipeline. The device for detecting the leakage of the membrane electrode of the galvanic pile can simultaneously detect the inner microleakage of a plurality of cavities relative to a plurality of cavities and the outer microleakage of the plurality of cavities, and can quickly detect the leakage of the membrane electrode plate.
Description
Technical Field
The invention relates to the technical field of vacuum leak detection, in particular to a leak detection device for a membrane electrode of a galvanic pile.
Background
The membrane electrode is a chip of the proton exchange membrane fuel cell, is a place for the electrochemical reaction of the proton exchange membrane fuel cell, and is a core link of the fuel cell technology.
The membrane electrode plate needs to be subjected to leak detection so as to ensure good sealing. During leak hunting, need carry out two liang of interior hourglass of examining between the cavity, examine outer hourglass to these cavities simultaneously again, current equipment need leak hunting one by one to the cavity, and leak hunting inefficiency.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a leak detection device for a membrane electrode of a galvanic pile.
An embodiment of the present invention provides a leak detection apparatus for detecting a leak of a stack membrane electrode plate, the stack membrane electrode plate being provided with a first chamber and a plurality of second chambers surrounding the first chamber, the first chamber including an upper chamber and a lower chamber that are separated from each other, the second chambers including a group a of second chambers and a group B of second chambers, two groups of the second chambers being spaced from each other in a direction around the first chamber, the leak detection apparatus for a stack membrane electrode plate including: the device comprises a vacuum box, a clamp, a leak detection pipeline, a first connecting pipeline, a second connecting pipeline, a valve group, a leak detector and a vacuum pump;
the clamp is arranged in the vacuum box and used for fixing the electrode plate of the electric pile membrane and sealing the first cavity and the second cavity;
the leak detection pipeline penetrates through the clamp to communicate the interior of the vacuum box with the group B second chambers, the upper chamber and the lower chamber;
the detectable medium source is communicated with a second connecting pipeline through the first connecting pipeline, and the second connecting pipeline respectively penetrates through the clamp to be communicated with the lower chamber and the two groups of second chambers;
the valve group comprises a first valve, a second valve, a third valve, a fourth valve and a fifth valve, wherein the first valve is used for controlling the communication between the first connecting pipeline and the lower chamber, the second valve is used for controlling the communication between the first connecting pipeline and the group A second chambers, the third valve is used for controlling the communication between the first connecting pipeline and the group B second chambers, the fourth valve is used for controlling the communication between the leak detection pipeline and the group B second chambers, and the fifth valve is used for controlling the communication between the leak detection pipeline and the lower chamber;
the leak detector is communicated with the interior of the vacuum box and is used for detecting the detectable medium source;
the vacuum pump is communicated with the first connecting pipeline.
Compared with the prior art, the pile membrane electrode leakage detection device can simultaneously detect the inner micro leakage of a plurality of cavities relative to a plurality of cavities and the outer leakage of the plurality of cavities, can quickly detect the leakage of a membrane electrode plate, and improves the leakage detection efficiency.
Furthermore, the pile membrane electrode leakage detection device also comprises a large leakage detection gas source and a pressure measurement device;
the large leakage detection gas source is communicated with the first connecting pipeline;
the pressure measuring device is communicated with the second chamber and the lower chamber through the second connecting pipeline. The cavity of the membrane electrode plate of the electric pile is filled with gas with set pressure, pressure drop method detection is carried out on all cavities of the workpiece in advance by using a pressure measuring device to detect large leakage, the obviously unqualified workpiece is quickly removed, and the detection efficiency is improved.
Further, the large leakage detection gas source is a dry gas source or a nitrogen gas source. The dry gas source or the nitrogen gas source is convenient to acquire and discharge.
Furthermore, the number of the pressure measuring devices is 3, and the pressure measuring devices are respectively communicated with the two groups of second cavities and the lower cavities through the second connecting pipelines. The one-to-one pressure measuring device can accelerate the speed measuring rate of large leakage detection.
Further, the second connecting pipeline comprises a main pipeline and 3 branch pipelines, the main pipeline is connected with the branch pipelines, and the 3 branch pipelines respectively penetrate through the clamp to be communicated with the lower chamber and the two groups of second chambers;
the first valve, the second valve and the third valve respectively and correspondingly control the on-off of 1 branch pipeline.
Further, the clamp comprises a first clamping plate and a second clamping plate, and the first clamping plate and the second clamping plate are used for clamping the membrane electrode plate and respectively closing two end openings of the first cavity and the second cavity;
the second connecting pipeline penetrates through the first clamping plate and is communicated with the two groups of second chambers and the lower chamber, the leakage detection pipeline penetrates through the second clamping plate and communicates the inside of the vacuum box with the group B of second chambers, the upper chamber and the lower chamber.
Compared with the prior art, the pile membrane electrode leakage detection device can simultaneously detect the inner micro leakage of a plurality of chambers relative to a plurality of chambers and the outer leakage of the plurality of chambers, can quickly detect the leakage of a membrane electrode plate, and improves the leakage detection efficiency; further, the cavity of the membrane electrode plate of the electric pile is filled with gas with set pressure, a pressure measuring device is used for detecting large leakage of each cavity of the workpiece in a pressure drop method in advance, the obviously unqualified workpiece is quickly removed, and the detection efficiency is improved; further, the large leakage detection gas adopts a dry gas source or a nitrogen source which is convenient to obtain and discharge; furthermore, the speed rate of large leakage detection can be accelerated through the one-to-one corresponding pressure measuring devices.
Another embodiment of the present invention provides a leak detection method for a stack membrane electrode, which is used for leak detection of a stack membrane electrode plate provided with a first chamber and a plurality of second chambers surrounding the first chamber, the first chamber including an upper chamber and a lower chamber that are separated from each other, the second chambers being divided into a group a of second chambers and a group B of second chambers, two groups of the second chambers being spaced from each other in a direction along the first chamber, the method including the steps of:
s1: placing a to-be-detected stack membrane electrode plate into a vacuum box, fixing the stack membrane electrode plate through a clamp, and sealing the lower chamber and the second chamber;
s2: vacuumizing the vacuum box, the lower chamber and the second chamber to a vacuum set value, and filling a detectable medium into the group A of second chambers to a pressure set value; communicating the group B second chamber, the upper chamber and the lower chamber with the vacuum box, and detecting the concentration of a detectable medium in the vacuum box;
s3: cutting off the communication between the group B second chambers and the vacuum box, evacuating the detectable medium of the group A second chambers, and then filling the group B second chambers with the detectable medium to a pressure set value; detecting the concentration of the detectable medium in the vacuum box;
s4: cutting off the communication between the lower chamber and the vacuum box, evacuating the detectable medium in the second chamber in the group B, and filling the detectable medium into the lower chamber to a pressure set value; detecting the concentration of the detectable medium in the vacuum box;
s5: and evacuating the detectable medium in the lower chamber, filling air into the first chamber, the second chamber and the vacuum box to reach an atmospheric pressure value, and taking out the electrode stack membrane electrode plate.
Compared with the prior art, the leak detection method for the membrane electrode of the galvanic pile can simultaneously detect the inner microleakage of a plurality of chambers relative to a plurality of chambers and the outer microleakage of the chambers, can quickly detect the leak of the membrane electrode plate, and improves the leak detection efficiency.
Further, in S3, cutting off the communication between the group B second chambers and the vacuum box to evacuate the group a second chambers of the detectable medium includes:
and cutting off the communication between the group B second chambers and the vacuum box, communicating the group A second chambers and the group B second chambers until the group A second chambers and the group B second chambers reach pressure balance, evacuating the detectable medium of the group A second chambers, and then filling the group B second chambers with the detectable medium to reach a pressure set value. The detectable medium is automatically filled into the next chamber to be detected through gas pressure, and energy is saved.
Further, in S4, cutting off the communication between the lower chamber and the vacuum box to evacuate the detectable medium of the group B second chambers, includes:
and cutting off the communication between the lower chamber and the vacuum box, communicating the group B second chambers with the lower chamber until the group B second chambers and the lower chamber reach pressure balance, evacuating the detectable medium of the group B second chambers, and then filling the detectable medium into the lower chamber to a pressure set value. The detectable medium is automatically filled into the next chamber to be detected through gas pressure, and energy is saved.
Further, the step S1 includes:
s1 a: placing the electric pile membrane electrode plate to be detected into the vacuum box, fixing the electric pile membrane electrode plate through a clamp, and sealing the lower chamber and the second chamber;
s1 b: and filling large leakage detection gas into the second chamber and the lower chamber to a pressure set value, and detecting the pressure values of the lower chamber and the second chamber. And (4) rapidly detecting the leakage of the chamber by a pressure drop method.
Compared with the prior art, the leak detection method for the membrane electrode of the galvanic pile simultaneously detects the inner microleakage of a plurality of chambers relative to a plurality of chambers and the outer microleakage of the chambers, can quickly detect the leak of the membrane electrode plate, and improves the leak detection efficiency; further, the detectable medium is automatically filled into the next chamber to be detected through gas pressure, so that energy is saved; further, the chamber is rapidly leak-tested by a pressure drop method.
In order that the invention may be more clearly understood, specific embodiments thereof will be described hereinafter with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of a leak detection device for a membrane electrode of a stack according to an embodiment of the invention.
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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, which is a schematic structural diagram of a leak detection apparatus for a stack membrane electrode according to an embodiment of the present invention, the leak detection apparatus for a stack membrane electrode is used for detecting a leak of a stack membrane electrode plate 80, where the stack membrane electrode plate 80 is provided with a first chamber and a plurality of second chambers surrounding the first chamber, the first chamber includes an upper chamber and a lower chamber that are separated from each other, the second chambers include a group a of second chambers and a group B of second chambers, and two groups of the second chambers are arranged at an interval from each other along a direction surrounding the first chamber, and the leak detection apparatus for a stack membrane electrode includes: vacuum box 10, clamp 11, leak detection pipe 12, first connecting pipe 30, second connecting pipe 40, valve group, leak detector 60 and first vacuum pump 22.
The vacuum box 10 is connected with a second vacuum pump 15, and the clamp 11 is arranged in the vacuum box 10 and used for fixing the electrode stack membrane electrode plate 80 and sealing the first chamber and the second chamber; the leak detection pipe 12 passes through the jig 11 to communicate the inside of the vacuum box 10 with the group B second chambers, the upper chamber, and the lower chamber; the detectable medium source 21 is communicated with a second connecting pipeline 40 through the first connecting pipeline 30, and the second connecting pipeline 40 is respectively communicated with the lower chamber and the two groups of second chambers through the clamp 11.
It should be noted that the clamp 11 may be designed according to the shape and structure of the actual electrode stack plate 80, so as to ensure that the electrode stack plate 80 can be fixed and the chamber thereof can be sealed. In this embodiment, the clamp 11 includes a first clamping plate and a second clamping plate, and the first clamping plate and the second clamping plate are used for clamping the membrane electrode plate 80 and respectively closing two end openings of the first chamber and the second chamber; the second connecting pipe 40 passes through the first clamping plate to be communicated with the two groups of second chambers and the lower chamber, and the leak detection pipe 12 passes through the second clamping plate to communicate the inside of the vacuum box 10 with the group B second chambers, the upper chamber and the lower chamber. It should be noted that the two groups of the second chambers of the electrode stack plates 80 are actually divided to distinguish that the two groups of the second chambers are respectively connected to different second connecting pipes 40.
The valve set includes a first valve 51, a second valve 52, a third valve 53, a fourth valve 54, and a fifth valve 55, wherein the first valve 51 is used to control the communication between the first connecting line 30 and the lower chamber, the second valve 52 is used to control the communication between the first connecting line 30 and the group a second chambers, the third valve 53 is used to control the communication between the first connecting line 30 and the group B second chambers, the fourth valve 54 is used to control the communication between the leak detection line 12 and the group B second chambers, and the fifth valve 55 is used to control the communication between the leak detection line 12 and the lower chamber. The upper chamber is always in communication with the vacuum box 10.
In some embodiments, the second connecting conduit 40 comprises a main conduit and 3 branch conduits, the main conduit being connected with the branch conduits, the 3 branch conduits respectively passing through the clamp 11 to communicate with the lower chamber and the two sets of the second chambers; the first valve 51, the second valve 52 and the third valve 53 respectively control the on-off of 1 branch pipeline correspondingly, and the first connecting pipeline 30 is communicated with the main pipeline.
The leak detector 60 is in communication with the interior of the vacuum box 10 for detecting the source of detectable medium 21; the first vacuum pump 22 communicates with the first connection pipe 30.
In order to accelerate the detection speed, the stack membrane electrode plate 80 is preliminarily detected, and in some embodiments, the stack membrane electrode plate further comprises a large leakage detection gas source 71 and a pressure measurement device 72; the large leak detection gas source 71 is in communication with the first connecting conduit 30; the pressure measuring device 72 communicates with the second chamber and the lower chamber through the second connecting duct 40. Preferably, the pressure measurement devices 72 are provided with 3 pressure measurement devices 72, the 3 pressure measurement devices 72 are respectively communicated with the two groups of second chambers and the lower chamber through the second connecting pipeline 40, each pressure measurement device 72 correspondingly detects one group of second chambers or the lower chamber, and the trouble that a single pressure measurement device 72 needs to be respectively connected with different chambers to detect one by one is reduced. When the second connecting pipe 40 includes a main pipe and 3 branch pipes, each pressure measuring device 72 is correspondingly communicated with one branch pipe, and the first connecting pipe 30 is connected with the main pipe. Preferably, the large leak detection gas source 71 is a dry gas source or a nitrogen gas source, and of course, since the leak detection method uses a pressure drop method to detect the large leak, other inert gas sources 14 may be selected as the large leak detection gas source 71. In addition, in the present embodiment, the leak detection pipe 12 connected to the lower chamber is connected to the second connection pipe correspondingly connected to the lower chamber, so that a plurality of pipes are prevented from passing through the jig; the leak detection pipeline 12 connected with the group B second chambers is connected to the second connecting pipeline correspondingly connected with the group B chambers, so that the phenomenon that the air tightness is influenced when a plurality of pipelines pass through the clamp is avoided.
In some embodiments, the above-mentioned leak detection apparatus for a membrane electrode of a stack further includes an inert gas source 14 communicated with the inside of the vacuum box 10, and is used for maintaining the vacuum degree in the vacuum box 10, and because helium, hydrogen, oxygen, carbon dioxide, and the like also exist in air, the inert gas is filled after the vacuum box 10 is evacuated, so that the influence of the detectable medium originally existing in the air can be avoided, and the detection accuracy of the detector can be ensured. In the present embodiment, the inert gas source 14 is a nitrogen gas source.
In some embodiments, the above-mentioned membrane electrode leak detection device further comprises a gas recovery assembly 24 in communication with the first connection pipe 30 for recovering the detectable medium, so as to save cost, and of course, the detectable medium may be discharged directly without recovery.
In some embodiments, the above-mentioned membrane electrode leak detection device of the stack further comprises a vacuum measurement device 13 communicated with the inside of the vacuum box 10, and used for detecting the vacuum degree inside the vacuum box 10.
In order to reduce noise when the large leakage gas is removed because the gas amount of the large leakage detection gas is large, in some embodiments, the above-mentioned leak detection device for the stack membrane electrode further includes: and the exhaust mechanism 23 is communicated with the first connecting pipeline 30, and after the heavy leakage detection is finished, the heavy leakage detection gas is exhausted through the exhaust mechanism 23 by opening the first valve 51, the second valve 52 and the third valve 53, wherein the exhaust mechanism 23 comprises an exhaust pipeline connected with the first connecting pipeline 30 and a silencer arranged at the tail end of the exhaust pipeline. In addition, another air exhaust mechanism 23 can be arranged, and the air exhaust mechanism 23 is communicated with the inside of the vacuum box 10 and used for returning the vacuum box 10 to the atmospheric pressure after detection is finished, so that the noise generated when the vacuum box 10 is inflated with air is reduced.
Above for the leak hunting device of the galvanic pile membrane electrode that this application provided, this application still provides a leak hunting method of galvanic pile membrane electrode, and this method can be used in above-mentioned galvanic pile membrane electrode leak hunting device for leak hunting galvanic pile membrane electrode 80, galvanic pile membrane electrode 80 is provided with first cavity and centers on a plurality of second cavities of first cavity, first cavity is including the last cavity and the lower cavity that separate each other, the second cavity falls into A group's second cavity and B group's second cavity, along centering on the direction of first cavity, it is two sets of the mutual interval arrangement of second cavity. It should be noted that the number of the second chambers is even, and in this embodiment, the number of the second chambers is 6, and the method includes the following steps:
s1: and placing the to-be-detected electric stack membrane electrode plate 80 into the vacuum box 10, fixing the electric stack membrane electrode plate 80 through the clamp 11, and sealing the lower chamber and the second chamber.
S2: vacuumizing the vacuum box 10, the first chamber and the second chamber to a vacuum set value, and filling a detectable medium into the group A second chamber to a pressure set value; and communicating the group B second chamber, the upper chamber and the lower chamber with the vacuum box 10, and detecting the concentration of the detectable medium in the vacuum box 10. If the concentration of the detectable medium in the vacuum box 10 does not exceed the set value, the detection of the group a second chamber to the group B second chamber, the upper chamber and the lower chamber is qualified, and the leakage of the group a second chamber is qualified. By the step, the inner microleakage between the adjacent second chambers and the inner microleakage of the half second chambers relative to the first chamber can be quickly detected, the step of leak detection one by one is reduced, and the detection rate is accelerated.
S3: cutting off the communication between the group B second chambers and the vacuum box 10, evacuating the detectable medium of the group A second chambers, and then filling the group B second chambers with the detectable medium to a pressure set value; detecting the concentration of the detectable medium in the vacuum box 10; if the concentration of the detectable medium in the vacuum box 10 does not exceed the set value, the inner microleakage detection of the group B second chambers to the upper chamber and the lower chamber is qualified, and the outer microleakage detection of the group B second chambers is qualified. By this step, the inner microleakage between the b group of second chambers and the first chamber can be detected quickly.
S4: cutting off the communication between the lower chamber and the vacuum box 10, evacuating the detectable medium in the second chamber in the group B, and then filling the detectable medium into the lower chamber to a pressure set value; detecting the concentration of the detectable medium in the vacuum box 10; if the concentration of the detectable medium in the vacuum box 10 does not exceed the set value, the internal microleakage detection of the upper chamber and the lower chamber is qualified, and therefore the detection of the membrane electrode plate 80 of the electric pile is qualified.
S5: and evacuating the detectable medium in the upper chamber, filling air into the first chamber, the second chamber and the vacuum box 10 to reach an atmospheric pressure value, and taking out the electrode stack membrane electrode plate 80.
For the purpose of energy saving and faster gas pumping, in some embodiments, in S3, the group B second chambers are cut off from the vacuum box 10, and the group a second chambers are evacuated of the detectable medium, including:
cutting off the communication between the group B second chambers and the vacuum box 10, communicating the group A second chambers with the group B second chambers until the group A second chambers and the group B second chambers reach pressure balance, evacuating the detectable medium of the group A second chambers, and then filling the group B second chambers with the detectable medium to a pressure set value.
For the purpose of energy saving and faster gas pumping, in some embodiments, in S4, the lower chamber is cut off from the vacuum box 10, and the detectable medium of the group B second chambers is evacuated, including:
and cutting off the communication between the lower chamber and the vacuum box 10, communicating the group B second chambers with the lower chamber until the group B second chambers and the lower chamber reach pressure balance, evacuating the detectable medium of the group B second chambers, and filling the detectable medium into the lower chamber to a pressure set value.
In order to accelerate the detection speed, preliminary detection is performed on the stack membrane electrode plate 80 in advance, and in some embodiments, the step S1 includes:
s1 a: placing the electric stack membrane electrode plate 80 to be detected into the vacuum box 10, fixing the electric stack membrane electrode plate 80 through a clamp 11, and sealing the lower chamber and the second chamber;
s1 b: filling large leakage detection gas into a second chamber and a lower chamber to a pressure set value, and detecting the pressure values of the lower chamber and the second chamber; if the pressure values of the second chamber and the lower chamber are lower than the set value, the large leakage detection is unqualified, the detection is finished, and the vacuum box 10 is opened to take out the electrode plate 80 of the electric pile membrane; if the pressure values of the second chamber and the lower chamber are higher than the set value, the leak detection is passed, and the process proceeds to step S2.
In the description of the present invention, it is to be understood that the terms "upper", "lower", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. In the present invention, it is not limited that only the lower chamber is selected to communicate with the second connecting pipe 40 and then leak detection is performed, but the upper chamber may also be selected to communicate with the second connecting pipe 40 and leak detection is performed.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A leak detection device for a membrane electrode of an electric pile is used for leak detection of the membrane electrode of the electric pile, the membrane electrode of the electric pile is provided with a first chamber and a plurality of second chambers surrounding the first chamber, the first chamber comprises an upper chamber and a lower chamber which are separated from each other, the second chambers are divided into a group A of second chambers and a group B of second chambers, and the second chambers are arranged at intervals in the direction surrounding the first chamber, and the leak detection device for the membrane electrode of the electric pile is characterized by comprising: the device comprises a vacuum box, a clamp, a leak detection pipeline, a first connecting pipeline, a second connecting pipeline, a valve group, a leak detector and a vacuum pump;
the clamp is arranged in the vacuum box and used for fixing the electrode plate of the electric pile membrane and sealing the first cavity and the second cavity;
the leak detection pipeline penetrates through the clamp to communicate the interior of the vacuum box with the group B second chambers, the upper chamber and the lower chamber;
the detectable medium source is communicated with a second connecting pipeline through the first connecting pipeline, and the second connecting pipeline respectively penetrates through the clamp to be communicated with the lower chamber and the two groups of second chambers;
the valve group comprises a first valve, a second valve, a third valve, a fourth valve and a fifth valve, wherein the first valve is used for controlling the communication between the first connecting pipeline and the lower chamber, the second valve is used for controlling the communication between the first connecting pipeline and the group A second chambers, the third valve is used for controlling the communication between the first connecting pipeline and the group B second chambers, the fourth valve is used for controlling the communication between the leak detection pipeline and the group B second chambers, and the fifth valve is used for controlling the communication between the leak detection pipeline and the lower chamber;
the leak detector is communicated with the interior of the vacuum box and is used for detecting the detectable medium source;
the vacuum pump is communicated with the first connecting pipeline.
2. The leak detection device for the membrane electrode of the galvanic pile according to claim 1, characterized in that:
the device also comprises a large leakage detection gas source and a pressure measuring device;
the large leakage detection gas source is communicated with the first connecting pipeline;
the pressure measuring device is communicated with the second chamber and the lower chamber through the second connecting pipeline.
3. The leak detection device for the membrane electrode of the galvanic pile according to claim 2, characterized in that: the large leakage detection gas source is a dry gas source or a nitrogen gas source.
4. The leak detection device for the membrane electrode of the galvanic pile according to claim 2, characterized in that: the pressure measuring devices are provided with 3 pressure measuring devices, and the number of the pressure measuring devices is 3, and the pressure measuring devices are respectively communicated with the two groups of second cavities and the lower cavity through the second connecting pipelines.
5. The leak detection device for the membrane electrode of the galvanic pile according to claim 1, characterized in that: the second connecting pipeline comprises a main pipeline and 3 branch pipelines, the main pipeline is connected with the branch pipelines, and the 3 branch pipelines respectively penetrate through the clamp to be communicated with the lower chamber and the two groups of second chambers;
the first valve, the second valve and the third valve respectively and correspondingly control the on-off of 1 branch pipeline.
6. The leak detection device for the membrane electrode of the galvanic pile according to claim 1, characterized in that: the clamp comprises a first clamping plate and a second clamping plate, and the first clamping plate and the second clamping plate are used for clamping the membrane electrode plate and respectively closing two end openings of the first cavity and the second cavity;
the second connecting pipeline penetrates through the first clamping plate and is communicated with the two groups of second chambers and the lower chamber, the leakage detection pipeline penetrates through the second clamping plate and communicates the inside of the vacuum box with the group B of second chambers, the upper chamber and the lower chamber.
7. A leak detection method for a stack membrane electrode, which is used for leak detection of a stack membrane electrode plate, wherein the stack membrane electrode plate is provided with a first chamber and a plurality of second chambers surrounding the first chamber, the first chamber comprises an upper chamber and a lower chamber which are separated from each other, the second chambers are divided into a group a second chamber and a group B second chamber, and two groups of the second chambers are arranged at intervals in a direction surrounding the first chamber, the method comprises the following steps:
s1: placing a to-be-detected stack membrane electrode plate into a vacuum box, fixing the stack membrane electrode plate through a clamp, and sealing the lower chamber and the second chamber;
s2: vacuumizing the vacuum box, the lower chamber and the second chamber to a vacuum set value, and filling a detectable medium into the group A of second chambers to a pressure set value; communicating the group B second chamber, the upper chamber and the lower chamber with the vacuum box, and detecting the concentration of a detectable medium in the vacuum box;
s3: cutting off the communication between the group B second chambers and the vacuum box, evacuating the detectable medium of the group A second chambers, and then filling the group B second chambers with the detectable medium to a pressure set value; detecting the concentration of the detectable medium in the vacuum box;
s4: cutting off the communication between the lower chamber and the vacuum box, evacuating the detectable medium in the second chamber in the group B, and filling the detectable medium into the lower chamber to a pressure set value; detecting the concentration of the detectable medium in the vacuum box;
s5: and evacuating the detectable medium in the lower chamber, filling air into the first chamber, the second chamber and the vacuum box to reach an atmospheric pressure value, and taking out the electrode stack membrane electrode plate.
8. A method of leak detection as defined in claim 7, wherein evacuating the detectable medium from the group a second chambers by cutting off communication between the group B second chambers and the vacuum box in S3 comprises:
and cutting off the communication between the group B second chambers and the vacuum box, communicating the group A second chambers and the group B second chambers until the group A second chambers and the group B second chambers reach pressure balance, evacuating the detectable medium of the group A second chambers, and then filling the group B second chambers with the detectable medium to reach a pressure set value.
9. A method of leak detection as defined in claim 7, wherein evacuating the detectable medium from the group B second chambers by cutting off the lower chamber from communication with the vacuum box in S4 comprises:
and cutting off the communication between the lower chamber and the vacuum box, communicating the group B second chambers with the lower chamber until the group B second chambers and the lower chamber reach pressure balance, evacuating the detectable medium of the group B second chambers, and then filling the detectable medium into the lower chamber to a pressure set value.
10. A method of leak detection as defined in claim 7, wherein said step S1 includes:
s1 a: placing the electric pile membrane electrode plate to be detected into the vacuum box, fixing the electric pile membrane electrode plate through a clamp, and sealing the lower chamber and the second chamber;
s1 b: and filling large leakage detection gas into the second chamber and the lower chamber to a pressure set value, and detecting the pressure values of the lower chamber and the second chamber.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113286472A (en) * | 2021-04-01 | 2021-08-20 | 华翔翔能科技股份有限公司 | Vacuum detection equipment is used in oil-immersed transformer production |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113286472A (en) * | 2021-04-01 | 2021-08-20 | 华翔翔能科技股份有限公司 | Vacuum detection equipment is used in oil-immersed transformer production |
| CN113286472B (en) * | 2021-04-01 | 2022-04-22 | 华翔翔能科技股份有限公司 | Vacuum detection equipment is used in oil-immersed transformer production |
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