CN215005200U - Tail-discharged hydrogen concentration detection device - Google Patents
Tail-discharged hydrogen concentration detection device Download PDFInfo
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- CN215005200U CN215005200U CN202120454411.3U CN202120454411U CN215005200U CN 215005200 U CN215005200 U CN 215005200U CN 202120454411 U CN202120454411 U CN 202120454411U CN 215005200 U CN215005200 U CN 215005200U
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Abstract
The utility model relates to the technical field of fuel cells, in particular to a tail exhaust hydrogen concentration detection device, which comprises a main air inlet pipeline, an acquisition pipeline and a hydrogen concentration sensor; the primary air inlet pipeline comprises a first pipeline and a second pipeline which are communicated, and the pressure of the second pipeline is less than that of the first pipeline; the collecting pipeline comprises a first end part and a second end part, the first end part extends into the first pipeline, and one end of the second end part extends into the second pipeline; the hydrogen concentration sensor is arranged in the collecting pipeline, and valves are arranged on the collecting pipeline on two sides of the hydrogen concentration sensor; through the independently arranged collection pipeline and the cooperation of the pressure difference, the change of the hydrogen concentration can be monitored more quickly and accurately; the shunting collection eliminates valuable parts such as a hydrogen circulating pump and the like, saves the cost, reduces the control difficulty and improves the stability; the valve is added, so that the air inflow of the collecting pipeline can be closed when not needed, the monitoring is stopped, and the service life of the hydrogen concentration sensor is greatly prolonged.
Description
Technical Field
The utility model relates to a fuel cell technical field, concretely relates to tail hydrogen concentration detection device that discharges.
Background
In the existing fuel cell engine test, most of tail exhaust is mixed exhaust of hydrogen and air, and if the hydrogen concentration is too high in the exhaust process, the safety problem is involved, so that the explosion risk is caused; meanwhile, the numerical value of the hydrogen concentration is related to the energy efficiency ratio of the fuel cell engine, so that the monitoring function of the tail exhaust hydrogen concentration of the test board of the fuel cell engine is particularly important. At present, the service life of a hydrogen concentration sensor which is an important component for monitoring the hydrogen concentration is hour unit and the cost is high, and in addition, the hydrogen emission has the characteristics of indirection and high frequency due to the working characteristics of a fuel cell engine, so the hydrogen monitoring function of the fuel cell engine test board has higher requirements on the protection of the hydrogen concentration sensor and the extraction of hydrogen tail exhaust gas.
The existing fuel cell tail gas extraction methods are two, wherein one method is to use a circulating pump to convey the tail gas to a hydrogen concentration sensor to monitor the concentration of the tail gas; the utility model provides an increase an inclined line and directly introduce hydrogen concentration sensor with hydrogen in the tail row pipeline, because of hydrogen circulating pump, hydrogen concentration sensor are with high costs, hydrogen concentration sensor life is short, consequently needs a low-cost and can regularly monitor the device of tail row hydrogen concentration.
CN201920320797.1 discloses a fuel cell tail row hydrogen concentration detection and mixed diluting device and new energy automobile device, and this patent has reduced the cost, but is not perfect in the aspect of the protection of hydrogen concentration sensor life, can't break off the collection gas in the test process, and its tail row pipeline does not have reducing design, and the pressure differential is little, and the actual collection gas in-process velocity of flow is slow, and the collection response time is long, influences measurement accuracy.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the tail exhaust hydrogen concentration detection device is accurate in measurement follow-up, low in cost and longer in service life.
In order to solve the technical problem, the utility model discloses a technical scheme be:
a tail exhaust hydrogen concentration detection device comprises a main air inlet pipeline, an acquisition pipeline and a hydrogen concentration sensor;
the primary air inlet pipeline comprises a first pipeline and a second pipeline which are communicated, the first pipeline is communicated with the second pipeline, and the pressure of the second pipeline is smaller than that of the first pipeline; the collecting pipeline comprises a first end part and a second end part, the first end part extends into the first pipeline, and one end of the second end part extends into the second pipeline;
the hydrogen concentration sensor is arranged in the collection pipeline, and valves are arranged on the collection pipeline on two sides of the hydrogen concentration sensor.
In order to solve the technical problem, the utility model discloses an another technical scheme be:
a detection method of a tail exhaust hydrogen concentration detection device is characterized in that one end of a first pipeline, which is far away from a second pipeline, is butted with a tail exhaust port of a fuel cell engine, and a collection pipeline is used for shunting gas of a main gas inlet pipeline;
when the hydrogen concentration needs to be tested, valves on two sides of the hydrogen concentration sensor are opened, and the flow-divided gas passes through the hydrogen concentration sensor; if the monitoring is not needed, the valves on both sides of the hydrogen concentration sensor are closed.
The beneficial effects of the utility model reside in that: through the independently arranged acquisition pipeline, the gas flow rate of the pipeline is high by matching with the pressure difference generated by the pressure of the second pipeline, which is smaller than the pressure of the first pipeline, so that the change of the hydrogen concentration can be more quickly and accurately monitored, the response is sensitive, and the measurement is accurate; the shunting collection eliminates valuable parts such as a hydrogen circulating pump and the like, so that on one hand, the cost is saved, meanwhile, the control difficulty is reduced, the stability is improved, the cost is low, and the control is simple; the valve is added, so that the air inflow of the collecting pipeline can be closed when not needed, the monitoring is stopped, and the service life of the hydrogen concentration sensor is greatly prolonged.
Drawings
Fig. 1 is a schematic structural diagram of a tail hydrogen concentration detection device according to an embodiment of the present invention;
description of reference numerals: 1. a first pipeline; 2. a first end portion; 3. a first electrically powered ball valve; 4. a chuck tee joint; 5. A gasket; 6. a hydrogen concentration sensor; 7. a second electrically operated ball valve; 8. a second pipeline; 9. a second end portion.
Detailed Description
In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1, a tail-gas exhaust hydrogen concentration detection device includes a main gas inlet pipeline, a collection pipeline and a hydrogen concentration sensor 6;
the primary air inlet pipeline comprises a first pipeline 1 and a second pipeline 8 which are communicated, the first pipeline 1 is communicated with the second pipeline 8, and the pressure of the second pipeline 8 is smaller than that of the first pipeline 1; the collecting pipeline comprises a first end part 2 and a second end part 9, the first end part 2 extends into the first pipeline 1, and one end of the second end part 9 extends into the second pipeline 8;
the hydrogen concentration sensor 6 is arranged in the collection pipeline, and valves are arranged on the collection pipeline on two sides of the hydrogen concentration sensor 6.
From the above description, through the independently arranged collection pipeline, the pressure of the second pipeline 8 is smaller than the pressure difference generated by the pressure of the first pipeline 1, and the pipeline gas flow rate is high, so that the hydrogen concentration change can be more quickly and accurately monitored, the response is sensitive, and the measurement is accurate; the shunting collection eliminates valuable parts such as a hydrogen circulating pump and the like, so that on one hand, the cost is saved, meanwhile, the control difficulty is reduced, the stability is improved, the cost is low, and the control is simple; the valve is added, so that the air inflow of the collecting pipeline can be closed when not needed, the monitoring is stopped, and the service life of the hydrogen concentration sensor 6 is greatly prolonged.
Furthermore, one end of the collecting pipeline obliquely extends into the first pipeline 1.
As can be seen from the above description, the pipe resistance can be effectively reduced by the fact that one end of the collecting pipe obliquely extends into the first pipe 1.
Further, the collecting pipeline is positioned above the first pipeline 1.
Further, the second end portion 9 is an inverted triangle.
As is apparent from the above description, the outlet resistance can be reduced by the inverted triangular arrangement.
Further, the hydrogen concentration sensor 6 is connected to the collection pipeline through the chuck tee joint 4.
Further, a sealing gasket 5 is arranged between the hydrogen concentration sensor 6 and the chuck tee joint 4.
As is apparent from the above description, the seal can be compressed by the seal 5 to prevent gas leakage.
Further, the valve is an electric ball valve, a first electric ball valve 3 is close to the first pipeline 1, and a second electric ball valve 7 is close to the second pipeline 8.
Further, the first pipeline 1 is horizontally arranged, and the second pipeline 8 is vertically arranged.
As can be seen from the above description, the second pipeline 8 is vertically arranged, according to the steam-water separation principle, gas is emptied upwards, and water is connected into the floor drain downwards.
A detection method of a tail exhaust hydrogen concentration detection device is characterized in that one end, far away from a second pipeline 8, of a first pipeline 1 is in butt joint with a tail exhaust port of a fuel cell engine, and a collection pipeline divides main gas inlet pipeline gas;
when the hydrogen concentration needs to be tested, the valves on the two sides of the hydrogen concentration sensor 6 are opened, so that the shunt gas passes through the hydrogen concentration sensor 6; if the monitoring is not necessary, the valves on both sides of the hydrogen concentration sensor 6 are closed.
Example one
A tail exhaust hydrogen concentration detection device comprises a main air inlet pipeline, an acquisition pipeline and a hydrogen concentration sensor 6;
the main air inlet pipeline comprises a first pipeline 1 arranged horizontally and a second pipeline 8 arranged vertically, the first pipeline 1 is communicated with the second pipeline 8, and the pressure of the second pipeline 8 is smaller than that of the first pipeline 1; the collecting pipeline comprises a first end part 2 and a second end part 9, the first end part 2 extends into the first pipeline 1, and one end of the second end part 9 extends into the second pipeline 8;
the hydrogen concentration sensor 6 is arranged in the collection pipeline, and valves are arranged on the collection pipeline on two sides of the hydrogen concentration sensor 6.
One end of the collecting pipeline obliquely extends into the first pipeline 1.
The collection pipeline is positioned above the first pipeline 1.
The second end 9 is an inverted triangle.
The hydrogen concentration sensor 6 is connected to the collection pipeline through the chuck tee joint 4.
And a sealing gasket 5 is arranged between the hydrogen concentration sensor 6 and the chuck tee joint 4.
The valve is an electric ball valve, a first electric ball valve 3 is close to the first pipeline 1, and a second electric ball valve 7 is close to the second pipeline 8.
The working process is as follows: one end of the first pipeline 1, which is far away from the second pipeline 8, is butted with a tail discharge port of a fuel cell engine, then the gas of the main pipeline is divided by the collecting pipeline, the collecting flow of the collected hydrogen is increased through the pressure difference between the first pipeline 1 and the second pipeline 8, the hydrogen flow rate is improved, and the divided pipeline is inclined upwards, so that the pipe resistance is effectively reduced; when hydrogen concentration needs to be tested, the first electric ball valve 3 and the second electric ball valve 7 are opened through the electric control assembly, so that the shunting gas passes through the hydrogen concentration sensor 6, the hydrogen concentration is monitored, if the monitoring is not needed, the first electric ball valve 3 and the second electric ball valve 7 are closed, the gas is cut off, and the service time of the hydrogen concentration sensor 6 is prolonged.
Example two
In the detection method of the tail exhaust hydrogen concentration detection device in the first embodiment, one end of the first pipeline 1, which is far away from the second pipeline 8, is butted with a tail exhaust port of a fuel cell engine, and a collection pipeline divides gas of a main gas inlet pipeline;
when the hydrogen concentration needs to be tested, the valves on the two sides of the hydrogen concentration sensor 6 are opened, so that the shunt gas passes through the hydrogen concentration sensor 6; if the monitoring is not necessary, the valves on both sides of the hydrogen concentration sensor 6 are closed.
The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.
Claims (8)
1. The tail exhaust hydrogen concentration detection device is characterized by comprising a main air inlet pipeline, an acquisition pipeline and a hydrogen concentration sensor;
the primary air inlet pipeline comprises a first pipeline and a second pipeline which are communicated, the first pipeline is communicated with the second pipeline, and the pressure of the second pipeline is smaller than that of the first pipeline; the collecting pipeline comprises a first end part and a second end part, the first end part extends into the first pipeline, and one end of the second end part extends into the second pipeline;
the hydrogen concentration sensor is arranged in the collection pipeline, and valves are arranged on the collection pipeline on two sides of the hydrogen concentration sensor.
2. The tail-gas hydrogen concentration detection device according to claim 1, wherein one end of the collection pipe is inclined to protrude into the first pipe.
3. The tail stack hydrogen concentration detection device according to claim 1, wherein the collection pipe is located above the first pipe.
4. The tail stack hydrogen concentration detection apparatus according to claim 1, wherein the second end portion is an inverted triangle arrangement.
5. The tail-gas hydrogen concentration detection device according to claim 1, wherein the hydrogen concentration sensor is connected to the collection pipe through a chuck tee.
6. The tail-gas hydrogen concentration detection device according to claim 5, wherein a seal gasket is provided between the hydrogen concentration sensor and the chuck tee.
7. The tail-gas hydrogen concentration detection device according to claim 1, wherein the valve is an electric ball valve, a first electric ball valve is adjacent to the first pipeline, and a second electric ball valve is adjacent to the second pipeline.
8. The tail stack hydrogen concentration detection apparatus according to claim 1, wherein the first pipe is disposed horizontally, and the second pipe is disposed vertically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120454411.3U CN215005200U (en) | 2021-03-03 | 2021-03-03 | Tail-discharged hydrogen concentration detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120454411.3U CN215005200U (en) | 2021-03-03 | 2021-03-03 | Tail-discharged hydrogen concentration detection device |
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| CN215005200U true CN215005200U (en) | 2021-12-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114594136A (en) * | 2022-02-09 | 2022-06-07 | 东北大学 | Experimental device and method for simulating pneumatic conveying dust explosion characteristics under multi-factor condition |
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2021
- 2021-03-03 CN CN202120454411.3U patent/CN215005200U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114594136A (en) * | 2022-02-09 | 2022-06-07 | 东北大学 | Experimental device and method for simulating pneumatic conveying dust explosion characteristics under multi-factor condition |
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