CN210269081U - Air tightness detection device - Google Patents
Air tightness detection device Download PDFInfo
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- CN210269081U CN210269081U CN201921450670.8U CN201921450670U CN210269081U CN 210269081 U CN210269081 U CN 210269081U CN 201921450670 U CN201921450670 U CN 201921450670U CN 210269081 U CN210269081 U CN 210269081U
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- detection apparatus
- airtightness detection
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Abstract
The utility model discloses an air tightness detection device, it includes: the device comprises a movable component, a nitrogen cylinder, a storage box, a pressure gauge, a pressure reducing valve, a connecting pipeline and a stop valve; nitrogen cylinder and storing box all place in on the movable component, the relief pressure valve set up in the gas outlet of nitrogen cylinder, the one end of connecting tube connect in the gas outlet of relief pressure valve, the other end of connecting tube connect in the manometer, the stop valve connect in the middle section of connecting tube, the storing box is used for placing the joint. The air tightness detection device can be conveniently moved, so that the requirement of outdoor whole vehicle air tightness detection can be met, and the convenience of whole vehicle testing is improved.
Description
Technical Field
The utility model relates to a fuel cell field, in particular to gas tightness detection device.
Background
A fuel cell is a chemical device that directly converts chemical energy of fuel into electrical energy, and is also called an electrochemical generator. It is a fourth power generation technology following hydroelectric power generation, thermal power generation and atomic power generation. The fuel cell converts the Gibbs free energy in the chemical energy of the fuel into electric energy through electrochemical reaction, and is not limited by the Carnot cycle effect, so the efficiency is high; in addition, fuel cells use fuel and oxygen as raw materials; meanwhile, no mechanical transmission part is arranged, so that no noise pollution is caused, and the discharged harmful gas is less. It follows that fuel cells are the most promising power generation technology from the viewpoint of energy conservation and ecological environment conservation
With the rapid development of fuel cells, external leakage, series leakage tests and nitrogen purging are required to be performed on the fuel cells in the research and development verification stage, system tests and loading operation, but at present, the operations can be performed only in a laboratory or a workshop by using an indoor gas pipeline, and the maintenance convenience of the whole vehicle (especially a large-sized vehicle) is seriously hindered.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide an air tightness detection device in order to overcome prior art's above-mentioned defect.
The utility model discloses an above-mentioned technical problem is solved through following technical scheme:
an air-tightness detecting device, comprising: the device comprises a movable component, a nitrogen cylinder, a storage box, a pressure gauge, a pressure reducing valve, a connecting pipeline and a stop valve;
the nitrogen cylinder with the storing box all place in on the movable component, the relief pressure valve set up in the gas outlet of nitrogen cylinder, the one end of connecting tube connect in the gas outlet of relief pressure valve, the other end of connecting tube connect in the manometer, the stop valve connect in the middle section of connecting tube, the storing box is used for placing the joint.
Preferably, the movable member is a dolly.
Preferably, the small handcart includes handrail portion and bottom plate, handrail portion connect in the first side of bottom plate, the nitrogen cylinder place in on the bottom plate, the storing box for handrail portion set up in the opposite side of nitrogen cylinder.
Preferably, the dolly further comprises two rollers connected to the first side of the bottom plate.
Preferably, the trolley further comprises an abutting plate, the abutting plate is arranged below a second side of the bottom plate, and the second side is opposite to the first side.
Preferably, the armrest portion is a U-shaped member.
Preferably, the air tightness detection device further comprises a leading-out pipeline, the leading-out pipeline is connected to the middle section of the connecting pipeline, and the stop valve is connected to the leading-out pipeline.
Preferably, the air outlet of the stop valve is used for connecting the joint.
Preferably, the pressure gauge is a precision pressure gauge.
Preferably, the movable member is electrically controlled.
The utility model discloses an actively advance the effect and lie in: the air tightness detection device can be conveniently moved, so that the requirement of outdoor whole vehicle air tightness detection can be met, and the convenience of whole vehicle testing is improved.
Drawings
Fig. 1 is a schematic perspective view of an air-tightness detecting device according to a preferred embodiment of the present invention.
Fig. 2 is a schematic perspective view of various connectors and plugs according to a preferred embodiment of the present invention.
Fig. 3 is a schematic view of a pipeline connection of a three-cavity pressure maintaining test according to a preferred embodiment of the present invention.
Fig. 4 is a schematic view of the pipeline connection for the pressure maintaining test of the hydrogen chamber according to the preferred embodiment of the present invention.
Fig. 5 is a schematic view of the piping connection for the hydrogen empty string leak test according to the preferred embodiment of the present invention.
Fig. 6 is a schematic view of the pipeline connection for the hydrogen chamber serial water chamber leakage test according to the preferred embodiment of the present invention.
Fig. 7 is a schematic diagram of the pipeline connection for the cavity water-serial cavity leakage test according to the preferred embodiment of the present invention.
Fig. 8 is a schematic diagram of the pipeline connection for pressure maintaining and purging of the hydrogen path of the system according to the preferred embodiment of the present invention.
Description of reference numerals:
Trolley 110
Armrest portion 111
Abutting plate 114
Connecting pipe 160
Lead-out pipe 170
Stop valve 180
Quick-connecting tee 501
Quick-connect straight-through 502
Air passage joint 504
Hydrogen gas path plug 509
Waterway air vent plug 510
Detailed Description
The present invention will be further described by way of examples with reference to the accompanying drawings, but the present invention is not limited thereto.
As shown in fig. 1, the airtightness detection apparatus 100 includes: a movable component, a nitrogen gas cylinder 120, a storage box 130, a pressure gauge 140, a pressure reducing valve 150, a connecting pipeline 160 and a stop valve 180;
the nitrogen cylinder 120 and the storage box 130 are both placed on the movable member, the pressure reducing valve 150 is arranged at the gas outlet of the nitrogen cylinder 120, one end of the connecting pipeline 160 is connected to the gas outlet of the pressure reducing valve 150, the other end of the connecting pipeline 160 is connected to the pressure gauge 140, the stop valve 180 is connected to the middle section of the connecting pipeline 160, and the storage box 130 is used for placing a joint.
The air tightness detection device 100 can be conveniently moved, so that the requirement of outdoor whole vehicle air tightness detection can be met, and the convenience of whole vehicle testing is improved.
The pressure gauge 140 can detect the pressure output from the nitrogen gas cylinder 120, the pressure reducing valve 150 can adjust the pressure of the gas output from the nitrogen gas cylinder 120, and the stop valve 180 is used for outputting nitrogen gas.
Since the air-tightness detecting device 100 is used for detecting the air-tightness of the fuel cell, various joints and plugs as shown in fig. 2 are required, and thus, a storage box 130 is provided for placing the joints and plugs.
The joints and the plugs are respectively a quick-connection tee joint 7, a quick-connection straight-through 8, a water path joint 9, an air path joint 10, a hydrogen path joint 11, a purging joint 12, a water path plug 13, an air path plug 14, a hydrogen path plug 15 and a water path exhaust port plug 16.
In the present embodiment, the movable member is the small cart 110, but the present invention is not limited thereto, and those skilled in the art may select other members as the movable member.
Preferably, the movable member is electrically controlled. For example, the movable member is an electrically driven flatbed, and the nitrogen gas cylinder 120 is fixed to the flatbed.
The cart 110 includes an armrest portion 111 and a bottom plate 112, the armrest portion 111 is connected to a first side of the bottom plate 112, the nitrogen gas cylinder 120 is placed on the bottom plate 112, and the storage box 130 is provided on the opposite side of the nitrogen gas cylinder 120 with respect to the armrest portion 111.
The dolly 110 further comprises two rollers 113, the two rollers 113 being connected to a first side of the base plate 112. Thus, the cart 110 can be moved as long as the second side of the bottom plate 112 of the cart 110 is tilted by the armrest portion 111, and the cart 110 cannot be pushed when the second side of the bottom plate 112 of the cart 110 is not tilted.
The dolly 110 further comprises an abutment plate 114, the abutment plate 114 being provided below a second side of the bottom plate 112, the second side being opposite the first side. The abutting plate 114 abuts on the ground when the second side of the bottom plate 112 of the cart 110 is not tilted, so that the bottom plate 112 is horizontal when the cart 110 is at rest, and the nitrogen gas cylinder 120 does not topple.
The nitrogen gas cylinder 120 may be fixed to the armrest portion 111 by a rope 115 that surrounds the nitrogen gas cylinder 120. The bottom plate 112 of the nitrogen gas cylinder 120 may be provided with a circular recess into which the bottom of the nitrogen gas cylinder 120 is put to prevent the nitrogen gas cylinder 120 from slipping out of the bottom plate 112 during transportation.
The armrest portion 111 is a U-shaped member. The armrest portion 111 may be made of a U-shaped tube, which is relatively lightweight and may also meet strength requirements.
The airtightness detection apparatus 100 further includes a lead-out pipe 170, the lead-out pipe 170 is connected to the middle section of the connection pipe 160, and the shut-off valve 180 is connected to the lead-out pipe 170. The air outlet of the stop valve 180 is also connected with an air outlet pipe 190.
An air outlet pipe 190 of the air outlet of the stop valve 180 is used for connecting the joint.
The pressure gauge 140 is a precision pressure gauge 140. The precision pressure gauge 140 may be a 0.4 gauge, a 0.25 gauge, or a 0.16 gauge precision pressure gauge 140.
The nitrogen gas cylinder 120 contains high-pressure nitrogen gas therein.
The method of using the airtightness detection apparatus 100 is described below.
The operation method of the three-cavity pressure maintaining test comprises the following steps:
1. before the leakage test, the pressure reducing valve 150 is reset, and the stop valve 180 and the emptying valve of the nitrogen cylinder 120 are closed.
2. The pipe connection is as shown in fig. 3, two tee joints are connected in series, other interfaces are respectively connected with an air outlet pipe 190 of the nitrogen cylinder 120, a water path joint, an air path joint and a hydrogen path joint, the water path joint, the air path joint and the hydrogen path joint are respectively connected with a water cavity inlet, a cavity inlet and a hydrogen cavity inlet of the pile module 200, and a water path plug, an air path plug, a hydrogen path plug and a water path exhaust port plug are respectively connected with a water cavity outlet, a hydrogen cavity outlet and a water cavity exhaust port of the pile module 200.
3. The stop valve 180 of the nitrogen cylinder 120 is opened, the pressure reducer is adjusted, the pressure is slowly increased to 100kPa (according to actual needs), the pipe joints of all pipelines are smeared with soap liquid, and if leakage is found, the corresponding pipe joints are fastened.
4. 5 minutes after the pressure value of the three cavities reaches 100kPa (according to actual needs), the stop valve 180 of the nitrogen cylinder 120 is closed, and the pressure reducer and the attached needle valve are completely closed. And starts timing.
5. The time was recorded every 1kPa drop. After 10 minutes a reading on the lower pressure gauge 140 is recorded.
6. The air release valve is slowly opened to release all the compressed gas inside the stack module 200.
And judging whether the air tightness of each chamber of the fuel cell meets the requirement or not according to the recorded reading.
The operation method of the hydrogen cavity pressure maintaining test comprises the following steps:
1. before the leakage test, the pressure reducing valve 150 is reset, and the stop valve 180 and the emptying valve of the nitrogen cylinder 120 are closed.
2. The pipeline connection is as shown in fig. 4, the gas outlet pipe 190 of the nitrogen gas cylinder 120 is connected with a hydrogen line connector by using quick connection and direct connection, the hydrogen line connector is connected with the hydrogen cavity inlet of the galvanic pile module 200, and the hydrogen line plug is connected with the hydrogen cavity outlet of the galvanic pile module 200.
3. The shut valve 180 of the nitrogen gas cylinder 120 was opened, and the pressure was slowly increased to 50 kPa. The pressure of 50kPa was maintained for 5 minutes, the nitrogen gas cylinder 120 shut-off valve 180 was closed, the pressure reducer and the attached needle valve were completely closed, and the timer was started.
Note that: this pressure acts on the internal flow path, causing a pressure differential across the fuel cell stack membranes, not to pressurize more than 50 kPa. Which may otherwise result in damage to the fuel cell stack.
4. The time is recorded every 10kPa down and a reading on the lower pressure gauge 140 is recorded after 20 minutes.
5. The air release valve is slowly opened to release all the compressed gas inside the stack module 200.
And judging whether the gas tightness of the hydrogen chamber of the fuel cell meets the requirement or not according to the recorded reading.
The operation method of the hydrogen-air series leakage test comprises the following steps:
1. before the leakage test, the pressure reducing valve 150 is reset, and the stop valve 180 and the emptying valve of the nitrogen cylinder 120 are closed.
2. The soap bubble flow meter 400 is cleaned and a small amount of soap bubble water is added to the rubber cone.
3. The pipeline connection is as shown in fig. 5, the gas outlet pipe 190 of the nitrogen gas cylinder 120 is connected with a hydrogen line connector by using quick connection and direct connection, the hydrogen line connector is connected with the hydrogen cavity inlet of the galvanic pile module 200, and the hydrogen line plug is connected with the hydrogen cavity outlet of the galvanic pile module 200. The air line connection is connected to the outlet of the cavity of the stack module 200 and the other end is connected to the soap bubble flow meter 400. The air path plug is connected to the inlet of the cavity of the stack module 200.
4. The nitrogen cylinder 120 shut-off valve 180 is opened and the pressure is slowly increased to 50kPa, allowing the stack module 200 to pressurize.
Note that: this pressure acts on the internal flow path, causing a pressure differential across the fuel cell stack membranes, not to pressurize more than 50 kPa. Which may otherwise result in damage to the fuel cell stack.
5. Maintaining a pressure of 50kPa allowed the leakage process to stabilize for two minutes.
6. The rubber cone of bubble flow meter 400 was pressed to raise the bubble above the bottom vent and the time from 0 to 100 scales of the bubble was observed and recorded. This operation was repeated 3 to 5 times, and the average value was calculated.
And judging whether the air tightness between the hydrogen chamber and the air chamber meets the requirement or not according to the average value.
Operation method for leakage test of hydrogen cavity serial water cavity
The hydrogen cavity string cooling cavity leak test measures the amount of leakage from the hydrogen cavity to the cooling cavity. The specific operation is as follows:
1. before the leakage test, the pressure reducing valve 150 is reset, and the stop valve 180 and the emptying valve of the nitrogen cylinder 120 are closed.
2. The soap bubble flow meter 400 is cleaned and a small amount of soap bubble water is added to the rubber cone.
3. The pipeline connection is as shown in fig. 6, the gas outlet pipe 190 of the nitrogen gas cylinder 120 is connected with a hydrogen line connector by using quick connection and direct connection, the hydrogen line connector is connected with the hydrogen cavity inlet of the galvanic pile module 200, and the hydrogen line plug is connected with the hydrogen cavity outlet of the galvanic pile module 200. The water way joint is connected with the outlet of the water cavity of the galvanic pile module 200, and the other end is connected with the soap bubble flowmeter 400. And the waterway air outlet plug is connected with an air outlet of the water cavity of the pile module 200.
4. The nitrogen cylinder 120 shut-off valve 180 is opened and the pressure is slowly increased to 50kPa, allowing the stack module 200 to pressurize.
Note that: this pressure acts on the internal flow path, causing a pressure differential across the fuel cell stack membranes, not to pressurize more than 50 kPa. Otherwise fuel cell stack damage may result!
5. Maintaining a pressure of 50kPa allowed the leakage process to stabilize for two minutes.
6. The rubber cone of bubble flow meter 400 was pressed to raise the bubble above the bottom vent and the time from 0 to 100 scales of the bubble was observed and recorded. This operation was repeated 3 to 5 times, and the average value was calculated.
And judging whether the air tightness between the hydrogen chamber and the cooling water chamber meets the requirement or not according to the average value.
Operation method for cavity water-serial cavity leakage test
1. Before the leakage test, the pressure reducing valve 150 is reset, and the stop valve 180 and the emptying valve of the nitrogen cylinder 120 are closed.
2. The soap bubble flow meter 400 is cleaned and a small amount of soap bubble water is added to the rubber cone.
3. The pipeline connection is as shown in fig. 7, the air outlet pipe 190 of the nitrogen cylinder 120 is connected with an air circuit connector by using quick connection and direct connection, the air circuit connector is connected with the cavity inlet of the galvanic pile module 200, and the air circuit plug is connected with the cavity outlet of the galvanic pile module 200. The water way joint is connected with the outlet of the water cavity of the galvanic pile module 200, and the other end is connected with the soap bubble flowmeter 400. And the waterway air outlet plug is connected with an air outlet of the water cavity of the pile module 200. .
4. The shut-off valve 180 of the nitrogen cylinder 120 is opened and the pressure is slowly increased to 50kPa, allowing the stack module 200 to be pressurized.
Note that: this pressure acts on the internal flow path, causing a pressure differential across the fuel cell stack membranes, not to pressurize more than 50 kPa. Otherwise fuel cell stack damage may result!
5. Maintaining a pressure of 50kPa allowed the leakage process to stabilize for two minutes.
6. The rubber cone of bubble flow meter 400 was pressed to raise the bubble above the bottom vent and the time from 0 to 100 scales of the bubble was observed and recorded. This operation was repeated 3 to 5 times, and the average value was calculated.
And judging whether the air tightness between the air chamber and the cooling water chamber meets the requirement or not according to the average value.
The operation method of pressure maintaining and purging of the hydrogen path of the system comprises the following steps:
1. before the leakage test, the pressure reducing valve 150 is reset, and the stop valve 180 and the emptying valve of the nitrogen cylinder 120 are closed.
2. The pipeline connection is as shown in fig. 8, the gas outlet of the nitrogen gas cylinder 120 is connected with the purging connector by using a quick connection straight-through way, and the purging quick plug is connected with the quick connector of the system.
3. And opening a stop valve 180 of the nitrogen cylinder 120, and adjusting the pressure to 50kPa (the pressure can be adjusted according to actual needs during purging, and after the pressure is adjusted, the purge is performed by utilizing the switching frequency of a tail exhaust electromagnetic valve of the upper computer control system).
4. The pressure of 50kPa was maintained for 5 minutes, the nitrogen gas cylinder 120 shut-off valve 180 was closed, the pressure reducer and the attached needle valve were completely closed, and the timer was started.
Note that: this pressure acts on the internal flow path, causing a pressure differential across the fuel cell stack membranes, not to pressurize more than 50 kPa. Which may otherwise result in damage to the fuel cell stack.
5. The time is recorded every 10kPa down and a reading on the lower pressure gauge 140 is recorded after 20 minutes.
And judging whether the hydrogen pipeline of the system meets the requirements or not according to the reading on the pressure gauge 140.
The test method is used for testing the air tightness of the pipeline of the whole vehicle.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like are used in the orientation or positional relationship indicated in the drawings, which are for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention unless otherwise indicated herein.
Although specific embodiments of the present invention have been described above, it will be understood by those skilled in the art that this is by way of example only and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are all within the scope of the invention.
Claims (10)
1. An airtightness detection apparatus, characterized by comprising: the device comprises a movable component, a nitrogen cylinder, a storage box, a pressure gauge, a pressure reducing valve, a connecting pipeline and a stop valve;
the nitrogen cylinder with the storing box all place in on the movable component, the relief pressure valve set up in the gas outlet of nitrogen cylinder, the one end of connecting tube connect in the gas outlet of relief pressure valve, the other end of connecting tube connect in the manometer, the stop valve connect in the middle section of connecting tube, the storing box is used for placing the joint.
2. The airtightness detection apparatus according to claim 1, wherein the movable member is a cart.
3. The airtightness detection apparatus according to claim 2, wherein the cart includes an armrest portion and a bottom plate, the armrest portion being connected to a first side of the bottom plate, the nitrogen gas cylinder being placed on the bottom plate, the storage box being provided on an opposite side of the nitrogen gas cylinder with respect to the armrest portion.
4. The airtightness detection apparatus according to claim 3, wherein the cart further comprises two rollers, and the two rollers are attached to the first side of the bottom plate.
5. The apparatus of claim 4, wherein the cart further comprises an abutment plate disposed below a second side of the bottom plate, the second side being opposite the first side.
6. The airtightness detection apparatus according to claim 3, wherein the armrest portion is a U-shaped member.
7. The airtightness detection apparatus according to claim 1, further comprising an outgoing pipe connected to a middle section of the connection pipe, and wherein the shutoff valve is connected to the outgoing pipe.
8. The airtightness detection apparatus according to claim 1, wherein the gas outlet of the shutoff valve is used for connection to the joint.
9. The airtightness detection apparatus according to claim 1, wherein the pressure gauge is a precision pressure gauge.
10. The airtightness detection apparatus according to claim 1, wherein the movable member is electrically controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921450670.8U CN210269081U (en) | 2019-09-02 | 2019-09-02 | Air tightness detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921450670.8U CN210269081U (en) | 2019-09-02 | 2019-09-02 | Air tightness detection device |
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| CN210269081U true CN210269081U (en) | 2020-04-07 |
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| CN201921450670.8U Active CN210269081U (en) | 2019-09-02 | 2019-09-02 | Air tightness detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024115739A1 (en) * | 2022-12-02 | 2024-06-06 | Witt Gmbh & Co. Holding Und Handels-Kg | System and method for checking the sealing tightness of packagings |
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2019
- 2019-09-02 CN CN201921450670.8U patent/CN210269081U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024115739A1 (en) * | 2022-12-02 | 2024-06-06 | Witt Gmbh & Co. Holding Und Handels-Kg | System and method for checking the sealing tightness of packagings |
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