CN210603776U - Detection apparatus for fuel cell gas tightness - Google Patents
Detection apparatus for fuel cell gas tightness Download PDFInfo
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- CN210603776U CN210603776U CN201921719529.3U CN201921719529U CN210603776U CN 210603776 U CN210603776 U CN 210603776U CN 201921719529 U CN201921719529 U CN 201921719529U CN 210603776 U CN210603776 U CN 210603776U
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Abstract
The utility model provides a detection apparatus for fuel cell gas tightness, it includes: the device comprises a to-be-detected electric pile main body (12), a first detection pipeline (101), a second detection pipeline (102) and a main pipeline (100), wherein one end of the first detection pipeline (101) can be communicated with the main pipeline (100), the other end of the first detection pipeline can be communicated with the to-be-detected electric pile main body (12), one end of the second detection pipeline (102) can also be communicated with the main pipeline (100), the other end of the second detection pipeline can be communicated with the to-be-detected electric pile main body (12), and the main pipeline (100) is communicated with an air source (1); and a mass flowmeter (7) is arranged on the first detection pipeline (101), and a pressure sensor (8) is arranged on the second detection pipeline (102). Through the utility model discloses can not need to change the test pipeline when testing to the galvanic pile main part of difference, be applicable to the galvanic pile main part of multiple difference, improve and detect the commonality.
Description
Technical Field
The utility model belongs to the technical field of fuel cell, concretely relates to detection apparatus of fuel cell gas tightness.
Background
The hydrogen fuel cell stack comprises three conducting parts, namely fuel gas, oxidant and coolant, wherein the fuel gas is high-purity hydrogen generally, the oxidant is compressed air or high-purity oxygen, and the coolant is water or glycol. In the operation process of the hydrogen fuel cell, the performance of the stack is reduced due to any one of three gas leaks, and even more, the mutual leakage of hydrogen and oxygen can cause explosion, thereby causing property loss or casualties. And therefore must require a hydrogen fuel cell to be tightly sealed.
The conventional test methods are now either single flow or pressure drop methods. The test equipment mainly comprises pressure equipment (a press) with a sealing test, sealing test equipment and pressure equipment (a press) which are separated. When the original testing method is no longer suitable for the currently tested stack body (for example, the flow channel volume is too small or too large), the first testing device cannot be used, and the second testing device needs different testing devices due to the two testing methods: the mass flowmeter and the pressure sensor need to be changed, and the test method needs to be changed, so that the original pipeline needs to be inevitably dismantled and connected to new equipment, the test pipeline needs to be changed, and time and labor are consumed.
Because fuel cell gas tightness detection device among the prior art has the galvanic pile main part that can't be applicable to multiple difference when the gas tightness test, changes test equipment technical problem such as consuming time and energy, consequently the utility model discloses research and design a detection device of fuel cell gas tightness.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in overcoming the fuel cell gas tightness detection device among the prior art and having the electric pile main part that can't be applicable to multiple difference, leading to the poor defect of commonality nature when the gas tightness test to a detection device of fuel cell gas tightness is provided.
The utility model provides a detection apparatus for fuel cell gas tightness, it includes:
the device comprises a to-be-detected electric pile main body, a first detection pipeline, a second detection pipeline and a main pipeline, wherein one end of the first detection pipeline can be communicated with the main pipeline, the other end of the first detection pipeline can be communicated with the to-be-detected electric pile main body, one end of the second detection pipeline can also be communicated with the main pipeline, the other end of the second detection pipeline can be communicated with the to-be-detected electric pile main body, and the main pipeline is communicated with an air source; and a mass flow meter is arranged on the first detection pipeline, and a pressure sensor is arranged on the second detection pipeline.
Preferably, the first and second electrodes are formed of a metal,
the first detection pipeline is also provided with a first control valve, and the second detection pipeline is also provided with a second control valve.
Preferably, the first and second electrodes are formed of a metal,
the reversing valve comprises a first end, a second end and a third end, the first end is communicated with the main pipeline, the second end is communicated with the first detection pipeline, the third end is communicated with the second detection pipeline, and the first end can be switched and communicated with the second end or the third end.
Preferably, the first and second electrodes are formed of a metal,
the reversing valve is a manual reversing valve or an electromagnetic valve; and/or the reversing valve is a two-position three-way valve or a three-position three-way valve.
Preferably, the first and second electrodes are formed of a metal,
and the main pipeline is also provided with a pressure control valve and a pressure gauge.
Preferably, the first and second electrodes are formed of a metal,
the pressure control valve comprises a primary pressure reducing valve and a secondary pressure reducing valve which are connected in series.
Preferably, the first and second electrodes are formed of a metal,
the electric pile testing device is characterized by further comprising a press main body, wherein the electric pile main body to be tested is arranged in the press main body.
Preferably, the first and second electrodes are formed of a metal,
the electric pile testing device is characterized in that a leakage detection upper template and a leakage detection lower template are further arranged in the press main body, and the electric pile main body to be tested is arranged between the leakage detection upper template and the leakage detection lower template.
Preferably, the first and second electrodes are formed of a metal,
and the exhaust end of the pile body to be tested is also connected with an exhaust check valve.
Preferably, the first and second electrodes are formed of a metal,
the press main body is provided with an internal cavity, the to-be-tested pile main body is arranged in the internal cavity, and the first detection pipeline or the second detection pipeline is communicated with the internal cavity and/or the exhaust check valve is communicated with the internal cavity.
The utility model provides a pair of detection apparatus for fuel cell gas tightness has following beneficial effect:
1. the utility model can feed gas by adopting the main pipeline to communicate with the gas source, can achieve the effect of detecting the gas tightness of the main body of the electric pile to be detected by detecting the flow of the detection gas through the first detection pipeline and communicating between the main pipeline and the main body of the electric pile to be detected through the first detection pipeline, and can achieve the effect of detecting the gas tightness of the main body of the electric pile to be detected by detecting the pressure drop of the detection gas through the second detection pipeline and the pressure sensor arranged on the second detection pipeline, thereby forming two different modes for detecting the gas tightness of the electric pile to be detected, namely, the first detection pipeline can be selectively opened to adopt mass flow to detect the gas tightness or the second detection pipeline is opened to adopt the pressure drop to detect the gas tightness without changing the detection pipeline when testing different main bodies of the electric pile, therefore, the method can be suitable for various different galvanic pile main bodies for effective detection, and the detection universality is improved;
2. the utility model discloses owing to detect the gas tightness or adopt pressure drop method B to detect the gas tightness through adopting mass flow method A respectively, can make when serious deviation appears in certain time flow method A or pressure drop method B result, can use corresponding another kind of scheme to carry out the problem investigation, if two kinds of scheme results are all ineligible, then judge that the galvanic pile main part is sealed unqualifiedly, if another kind of scheme test result is qualified, then inspect former test scheme self problem to effectively improve test structure's accuracy and reliability.
Drawings
Fig. 1 is a schematic structural view of a fuel cell airtightness detection device according to the present invention;
fig. 2 is a schematic structural view illustrating a first assembly process of the fuel cell gas tightness detecting device according to the present invention;
fig. 3 is a schematic structural diagram of a second assembly process of the fuel cell airtightness detection apparatus according to the present invention.
The reference numbers in the figures denote:
100. a main pipeline; 101. a first detection line; 102. a second detection line; 1. a gas source; 2. a primary pressure reducing valve; 3. a secondary pressure reducing valve; 4. a pressure gauge; 5. a diverter valve; 51. a first end; 52. a second end; 53. a third end; 61. a first control valve; 62. a second control valve; 7. a mass flow meter; 8. a pressure sensor; 9. a press main body; 10. detecting a leak on the upper template; 11. a lower template for leakage detection; 12. a pile body to be tested; 13. an exhaust check valve.
Detailed Description
As shown in fig. 1-3, the present invention provides a fuel cell airtightness detection apparatus, which includes:
the electric pile main body 12 to be detected further comprises a first detection pipeline 101, a second detection pipeline 102 and a main pipeline 100, wherein one end of the first detection pipeline 101 can be communicated with the main pipeline 100, the other end of the first detection pipeline can be communicated with the electric pile main body 12 to be detected, one end of the second detection pipeline 102 can also be communicated with the main pipeline 100, the other end of the second detection pipeline can be communicated with the electric pile main body 12 to be detected, and the main pipeline 100 is communicated with the gas source 1; and a mass flowmeter 7 is arranged on the first detection pipeline 101, and a pressure sensor 8 is arranged on the second detection pipeline 102.
The utility model can feed gas by adopting the main pipeline to communicate with the gas source, can achieve the effect of detecting the gas tightness of the main body of the electric pile to be detected by detecting the flow of the detection gas through the first detection pipeline and communicating between the main pipeline and the main body of the electric pile to be detected through the first detection pipeline, and can achieve the effect of detecting the gas tightness of the main body of the electric pile to be detected by detecting the pressure drop of the detection gas through the second detection pipeline and the pressure sensor arranged on the second detection pipeline, thereby forming two different modes for detecting the gas tightness of the electric pile to be detected, namely, the first detection pipeline can be selectively opened to adopt mass flow to detect the gas tightness or the second detection pipeline is opened to adopt the pressure drop to detect the gas tightness without changing the detection pipeline when testing different main bodies of the electric pile, therefore, the method can be suitable for various different galvanic pile main bodies for effective detection, and the detection universality is improved;
the utility model discloses owing to detect the gas tightness or adopt pressure drop method B to detect the gas tightness through adopting mass flow method A respectively, can make when serious deviation appears in certain time flow method A or pressure drop method B result, can use corresponding another kind of scheme to carry out the problem investigation, if two kinds of scheme results are all ineligible, then judge that the galvanic pile main part is sealed unqualifiedly, if another kind of scheme test result is qualified, then inspect former test scheme self problem to effectively improve test structure's accuracy and reliability.
Preferably, the first and second electrodes are formed of a metal,
the first detection pipeline 101 is further provided with a first control valve 61, and the second detection pipeline 102 is further provided with a second control valve 62. The first control valve can be effectively opened and closed through the first control valve, namely, the first control valve is opened when the air tightness of mass flow detection is required, and the first control valve is closed when the flow detection is not required.
Preferably, the first and second electrodes are formed of a metal,
the reversing valve 5 comprises a first end 51, a second end 52 and a third end 53, the first end 51 is communicated with the main pipeline 100, the second end 52 is communicated with the first detection pipeline 101, the third end 53 is communicated with the second detection pipeline 102, and the first end 51 can be switched and communicated with the second end 52 or the third end 53. The setting form through the switching-over valve can communicate with main line, first detection pipeline and second detection pipeline respectively to through the switching intercommunication between first end and second end and the third end, can make the main line communicate with first detection pipeline or with the second detection pipeline, whether select to adopt mass flow to detect the gas tightness promptly or adopt the pressure drop to detect the gas tightness.
Preferably, the first and second electrodes are formed of a metal,
the reversing valve 5 is a manual reversing valve or an electromagnetic valve; and/or the reversing valve 5 is a two-position three-way valve or a three-position three-way valve. The preferred structural style of the reversing valve of the utility model is that after the manual reversing valve is replaced by the electromagnetic valve, the automatic switching of two test schemes of the galvanic pile main body can be realized; the manual reversing valve is a two-position three-way valve, and can also be changed into a three-position three-way valve or other valves. Furthermore, the test device can be changed into an electromagnetic valve to realize automatic switching of the test scheme.
Preferably, the first and second electrodes are formed of a metal,
the main pipeline 100 is also provided with a pressure control valve and a pressure gauge 4. Can control the main line through the accuse pressure valve, the manometer can be arranged in detecting the gas pressure in this main line.
Preferably, the first and second electrodes are formed of a metal,
the pressure control valve comprises a primary pressure reducing valve 2 and a secondary pressure reducing valve 3 which are arranged in series. The two-stage pressure control function can be performed on the gas in the main pipeline through the first-stage pressure reducing valve and the second-stage pressure reducing valve, and the control precision is improved.
Preferably, the first and second electrodes are formed of a metal,
the device also comprises a press main body 9, and the electric pile main body 12 to be tested is arranged in the press main body 9. The accommodating structure for carrying out airtight detection on the galvanic pile main body to be detected can be formed through the press main body. Preferably, the press main body 9 is further provided with a leakage detection upper template 10 and a leakage detection lower template 11, and the to-be-detected pile main body 12 is arranged between the leakage detection upper template 10 and the leakage detection lower template 11. The upper leakage detection template and the lower leakage detection template can be respectively used for performing airtight detection on the galvanic pile to be detected.
Preferably, an exhaust check valve 13 is further connected and arranged at the exhaust end of the stack body 12 to be tested. The exhaust check valve can exhaust the gas passing through the main body of the galvanic pile to be tested.
Preferably, the first and second electrodes are formed of a metal,
the press main body 9 is provided with an internal cavity, the to-be-tested pile main body 12 is arranged in the internal cavity, and the first detection pipeline 101 or the second detection pipeline 102 is communicated with the internal cavity and/or the exhaust check valve 13 is communicated with the internal cavity. This is a further preferred form of construction of the press body of the invention.
The utility model provides a fuel cell galvanic pile seals test scheme has following advantage:
by using the flow method A and the pressure drop method B, the test result is more accurate and reliable.
When the test scheme is switched, the test pipeline does not need to be changed, and the accuracy and the efficiency are improved.
The original test equipment (the press with the sealing test, the separation of the press and the test equipment) can be reformed, and the more accurate sealing test is realized.
After the manual reversing valve is replaced by the electromagnetic valve, the automatic switching of two testing schemes of the galvanic pile main body can be realized.
The gas source is regulated to proper pressure by the first-stage and second-stage pressure reducing valves and then enters the manual reversing valve. The manual reversing valve outlet corresponds to two sealing performance test schemes: a flow method A corresponding to a mass flowmeter and a pressure drop method B corresponding to a high-precision pressure sensor. And matching the press main body and the leakage detection die to finish two different tests of the galvanic pile main body, contrasting the requirement parameters of each test scheme with good sealing, if A and B are met, judging that the galvanic pile main body is qualified, and if not, judging that the galvanic pile main body is unqualified.
For the test scheme with only the flow method A or the pressure drop method B, the test scheme can be modified into a double test scheme according to the attached figures 2 and 3. During normal testing, only the original testing scheme, namely the flow method A or the pressure drop method B, can be used. However, when the result of a certain flow method A or pressure drop method B has serious deviation, the problem can be solved by using the other corresponding scheme. And if the results of the two schemes are not qualified, judging that the seal of the galvanic pile main body is unqualified. And if the test result of the other scheme is qualified, checking the self problem of the original test scheme. In addition, a test calibration block is prepared to ensure that the two test schemes are accurate when the test calibration block is used for the first time.
The scheme can also be transformed into different test schemes that the reversing valves respectively supply air to different presses. The manual reversing valve is a two-position three-way valve, and can also be changed into a three-position three-way valve or other valves. Furthermore, the test device can be changed into an electromagnetic valve to realize automatic switching of the test scheme. The components are mounted and connected in the order shown in fig. 1.
In the assembly method, namely when the reversing valve is assembled into a pipeline during reconstruction, as shown in figures 2 and 3, the gas pipe at the marked part (a fork) shown in figures 2 and 3 is cut off and is sequentially connected to the gas inlet and one gas outlet of the reversing valve, and the other gas outlet is sequentially connected according to the figures. In the modified example, the air pipes behind the mass flowmeter and the high-precision pressure sensor are respectively connected to the press main body and the leakage detection die.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A fuel cell airtightness detection device is characterized in that: the method comprises the following steps:
the device comprises a to-be-detected electric pile main body (12), a first detection pipeline (101), a second detection pipeline (102) and a main pipeline (100), wherein one end of the first detection pipeline (101) can be communicated with the main pipeline (100), the other end of the first detection pipeline can be communicated with the to-be-detected electric pile main body (12), one end of the second detection pipeline (102) can also be communicated with the main pipeline (100), the other end of the second detection pipeline can be communicated with the to-be-detected electric pile main body (12), and the main pipeline (100) is communicated with an air source (1); and a mass flowmeter (7) is arranged on the first detection pipeline (101), and a pressure sensor (8) is arranged on the second detection pipeline (102).
2. The fuel cell airtightness detection apparatus according to claim 1, characterized in that:
the first detection pipeline (101) is further provided with a first control valve (61), and the second detection pipeline (102) is further provided with a second control valve (62).
3. The fuel cell airtightness detection apparatus according to claim 1, characterized in that:
the device is characterized by further comprising a reversing valve (5), wherein the reversing valve (5) comprises a first end (51), a second end (52) and a third end (53), the first end (51) is communicated with the main pipeline (100), the second end (52) is communicated with the first detection pipeline (101), the third end (53) is communicated with the second detection pipeline (102), and the first end (51) can be switched and communicated with the second end (52) or the third end (53).
4. The fuel cell airtightness detection apparatus according to claim 3, characterized in that:
the reversing valve (5) is a manual reversing valve or an electromagnetic valve; and/or the reversing valve (5) is a two-position three-way valve or a three-position three-way valve.
5. The fuel cell airtightness detection apparatus according to claim 1, characterized in that:
the main pipeline (100) is also provided with a pressure control valve and a pressure gauge (4).
6. The fuel cell airtightness detection apparatus according to claim 5, characterized in that:
the pressure control valve comprises a primary pressure reducing valve (2) and a secondary pressure reducing valve (3) which are arranged in series.
7. The fuel cell airtightness detection apparatus according to claim 1, characterized in that:
the device is characterized by further comprising a press main body (9), wherein the to-be-tested electric pile main body (12) is arranged in the press main body (9).
8. The fuel cell airtightness detection apparatus according to claim 7, characterized in that:
the high-precision electric pile test device is characterized in that a leakage detection upper template (10) and a leakage detection lower template (11) are further arranged in the press main body (9), and the electric pile main body (12) to be tested is arranged between the leakage detection upper template (10) and the leakage detection lower template (11).
9. The fuel cell airtightness detection apparatus according to claim 7 or 8, characterized in that:
and the exhaust end of the pile body (12) to be tested is also connected with an exhaust check valve (13).
10. The fuel cell airtightness detection apparatus according to claim 9, characterized in that:
the press main body (9) is provided with an internal cavity, the to-be-tested pile main body (12) is arranged in the internal cavity, and the first detection pipeline (101) or the second detection pipeline (102) is communicated with the internal cavity and/or the exhaust check valve (13) is communicated with the internal cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921719529.3U CN210603776U (en) | 2019-10-14 | 2019-10-14 | Detection apparatus for fuel cell gas tightness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921719529.3U CN210603776U (en) | 2019-10-14 | 2019-10-14 | Detection apparatus for fuel cell gas tightness |
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| Publication Number | Publication Date |
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| CN210603776U true CN210603776U (en) | 2020-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921719529.3U Active CN210603776U (en) | 2019-10-14 | 2019-10-14 | Detection apparatus for fuel cell gas tightness |
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