CN223021444U - Airtight detection pipeline structure of fuel cell engine system - Google Patents

Abstract

The utility model relates to the field of fuel cells, in particular to an airtight detection pipeline structure of a fuel cell engine system. The five-way joint is provided with an air inlet end, an air outlet end and three split ends, the air inlet end is communicated with the air delivery pipe, the three air delivery valves are respectively communicated with a throttle valve joint a and two throttle valve joints b, the throttle valve joints a and the throttle valve joints b are both communicated with pipe joints, and the pipe joints are communicated with split pipes. The utility model can accurately detect the valve function and the air tightness of the fuel cell engine system.

Description

Airtight detection pipeline structure of fuel cell engine system

Technical Field

The utility model relates to the field of fuel cells, in particular to an airtight detection pipeline structure of a fuel cell engine system.

Background

Currently, the hydrogen energy automobile industry rapidly develops, and the fuel cell engine system is very important as a core product in the whole automobile, so that the productivity of the fuel cell engine system becomes a key for measuring the development of an enterprise, and the detection of the functions and the performance of the engine system is a key factor for influencing the productivity. There is currently a lack of technology for accurately performing valve function and air tightness detection for fuel cell engine systems.

Disclosure of utility model

The utility model aims to solve the problems in the background technology and provides a fuel cell engine system airtight detection pipeline structure which can accurately detect the valve function and the airtightness of a fuel cell engine system.

The technical scheme includes that the fuel cell engine system airtight detection pipeline structure comprises a connector, a five-way connector and a return pipe structure, wherein the connector is provided with an air inlet passage and an air outlet passage, two ends of the air inlet passage are respectively communicated with an air inlet pipe and an air delivery pipe, a medium pressure sensor for detecting air pressure of the air inlet passage is arranged on the connector, the air inlet passage of the connector is communicated with a pressure detection assembly, a manual switch valve is arranged on the air delivery pipe, the five-way connector is provided with an air inlet end, an air outlet end and three split ends, the air inlet end is communicated with the air delivery pipe, a proportional valve a is arranged at the air inlet end, the three split ends are respectively communicated with a throttle valve connector a and two throttle valve connectors b, the throttle valve connectors a and the throttle valve connectors b are respectively communicated with pipe joints, the pipe joints are communicated with split pipes, the split pipes are communicated with the fuel cell engine system, and the return pipe structure is communicated with the five-way connector air outlet end.

Preferably, the pressure detecting assembly includes a pressure gauge and a connection pipe that communicates the pressure gauge with the joint intake passage.

The throttle valve connector a is provided with a pressure sensor, a pipe joint corresponding to the throttle valve connector a is communicated with a shunt pipe a, the shunt pipe a is communicated with a hydrogen system of the fuel cell engine system, two pipe joints corresponding to the two throttle valve connectors b are respectively communicated with a shunt pipe b and a shunt pipe c, the shunt pipe b is communicated with an air system of the fuel cell engine system, and the shunt pipe c is communicated with a thermal management system of the fuel cell engine system.

Preferably, the return pipe structure comprises a three-way joint, a return pipe communicated between the air outlet end of the five-way joint and one end of the three-way joint, a communicating pipe a and a communicating pipe b respectively communicated with the other two ends of the three-way joint, a collecting pipe with two air inlets and one air outlet, a proportional valve b arranged between the communicating pipe a and one air inlet of the collecting pipe, and a shutoff valve arranged between the communicating pipe b and the other air inlet of the collecting pipe.

Preferably, the gas outlet of the collecting pipe is communicated with one end of a gas outlet passage of the connector, and the other end of the gas outlet passage is communicated with a gas outlet pipe.

Compared with the prior art, the utility model has the following beneficial technical effects:

The utility model can accurately detect the valve function and the air tightness before leaving the factory of the fuel cell engine system, has good sealing performance of the whole pipeline, high detection efficiency and safe detection process. And after the air tightness detection is finished, the air tightness detection process is finished by performing pressure relief operation through a throttle valve and a proportional valve. The pressure gauge, the medium pressure sensor and the pressure sensor can detect the corresponding gas pressure everywhere, and irreversible damage to the hydrogen fuel cell engine system caused by excessive gas pressure is avoided.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present utility model.

The reference numerals are 1, an air inlet pipe, 2, a connector, 3, a pressure gauge, 31, a connecting pipe, 4, a medium-pressure sensor, 5, an air outlet pipe, 6, an air delivery pipe, 7, a manual switching valve, 8, a five-way connector, 81, a cover plate, 9, a proportional valve a, 10, a throttle valve, 11, a throttle valve connector a, 12, a pressure sensor, 13, a throttle valve connector b, 14, a pipe connector, 15, a shunt pipe a, 16, a shunt pipe b, 17, a shunt pipe c, 18, a return pipe, 19, a three-way connector, 20, a communicating pipe a, 21, a proportional valve b, 22, a communicating pipe b, 23, a shutoff valve, 24 and a collecting pipe.

Detailed Description

As shown in fig. 1, the fuel cell engine system air tightness detection pipeline structure provided by the embodiment comprises a joint 2, a five-way joint 8 and a return pipe structure.

The joint 2 is provided with an air inlet passage and an air outlet passage, two ends of the air inlet passage are respectively communicated with an air inlet pipe 1 and an air delivery pipe 6, and the air inlet pipe 1 is communicated with an external air source. The joint 2 is provided with a medium pressure sensor 4 for detecting the air pressure of the air inlet passage, and the air inlet passage of the joint 2 is communicated with the pressure gauge 3 through a connecting pipe 31. The gas pipe 6 is provided with a manual switch valve 7, and the on-off of a gas transmission passage of the gas pipe 6 is controlled by manually operating the manual switch valve 7.

The side face of the five-way joint 8 is connected with a cover plate 81, the five-way joint 8 is provided with an air inlet end, an air outlet end and three flow dividing ends, the air inlet end is communicated with the air delivery pipe 6, and a proportional valve a9 is arranged at the air inlet end. The three split ends are respectively communicated with a throttle valve 10, the three throttle valves 10 are respectively communicated with a throttle valve connector a11 and two throttle valve connectors b13, and the throttle valve connectors are connected with the throttle valves 10 through M6 hexagonal flange face bolts and are sealed by using O-shaped rings. The throttle valve connector a11 and the throttle valve connector b13 are respectively communicated with a pipe joint 14, a total of three pipe joints 14 are communicated with a shunt pipe, and the shunt pipe is communicated with a fuel cell engine system.

The throttle valve joint a11 is provided with a pressure sensor 12, and the pressure of the gas entering the fuel cell engine system can be accurately controlled through the proportional valve a9, the throttle valve 10 and the pressure sensor 12. The pipe joints 14 corresponding to the throttle valve joints a11 are communicated with a shunt pipe a15, the shunt pipe a15 is communicated with a hydrogen system of the fuel cell engine system, the two pipe joints 14 corresponding to the two throttle valve joints b13 are respectively communicated with a shunt pipe b16 and a shunt pipe c17, the shunt pipe b16 is communicated with an air system of the fuel cell engine system, and the shunt pipe c17 is communicated with a thermal management system of the fuel cell engine system. Pipe joints 14 with the same specification are reserved in a hydrogen system, an air system and a thermal management system on the fuel cell engine system respectively, and the pipe joints 14 are existing quick-assembly joints.

The return pipe structure comprises a three-way joint 19, a return pipe 18 communicated between the air outlet end of the five-way joint 8 and one end of the three-way joint 19, a communicating pipe a20 and a communicating pipe b22 respectively communicated with the other two ends of the three-way joint 19, a collecting pipe 24 with two air inlets and one air outlet, a proportional valve b21 arranged between the communicating pipe a20 and one air inlet of the collecting pipe 24, and a shutoff valve 23 arranged between the communicating pipe b22 and the other air inlet of the collecting pipe 24. The air outlet of the collecting pipe 24 is communicated with one end of an air outlet passage of the joint 2, and the other end of the air outlet passage is communicated with an air outlet pipe 5.

In the structure, the air inlet pipe 1, the air outlet pipe 5, the air delivery pipe 6, the communicating pipe a20, the communicating pipe b22 and the collecting pipe 24 are all stainless steel seamless steel pipes, and the ends of the stainless steel seamless steel pipes are communicated with other structures through cutting sleeve joints. The shunt tubes a15, b16 and c17 are all made of metal woven mesh steel tubes.

In the air tightness detection process, a proportional valve b21 and a shutoff valve 23 are closed, a manual switch valve 7 is opened, an external air source enters an air inlet passage of a joint 2 through an air inlet pipe 1, a pressure gauge 3 and a medium pressure sensor 4 detect the air pressure in the air inlet passage, air enters a five-way joint 8 through an air conveying pipe 6 and the manual switch valve 7, the pressure of compressed air is regulated and controlled through a proportional valve a9, the pressure of the air entering a fuel cell engine system is monitored through a pressure sensor 12, the bearing limit of the fuel cell engine system is not exceeded, three throttle valves 10 are closed after the pressure reaches an air tightness test condition, the pressure is maintained, and the air tightness detection is carried out on the fuel cell engine system. After the detection is finished, the three throttle valves 10 are opened, the proportional valve b21 is opened, compressed air in the fuel cell engine system is discharged through the return pipe 18, the communicating pipe a20, the proportional valve b21, the collecting pipe 24, the joint 2 air outlet passage and the air outlet pipe 5, if the proportional valve b21 fails, the shutoff valve 23 is opened, and the compressed air is discharged through the return pipe 18, the communicating pipe b22, the shutoff valve 23, the collecting pipe 24, the joint 2 air outlet passage and the air outlet pipe 5, so that emergency pressure relief is performed.

The embodiment can accurately detect the valve function and the tightness before leaving the factory of the fuel cell engine system, has good sealing performance of the whole pipeline, high detection efficiency and safe detection process. The integrated proportional valve and the throttle valve control an external air source to enter the fuel cell engine system, and pressure maintaining is carried out, so that the air tightness of the whole fuel cell engine system can be detected. And after the air tightness detection is finished, the air tightness detection process is finished by performing pressure relief operation through a throttle valve and a proportional valve. Meanwhile, the shut-off valve 23 is integrated, pressure relief can be carried out through the shut-off valve 23 when the proportional valve b21 fails, and the pressure gauge 3, the medium pressure sensor 4 and the pressure sensor 12 can detect corresponding gas pressure at all positions, so that irreversible damage to a hydrogen fuel cell engine system caused by excessive gas pressure is avoided.

The embodiments of the present utility model have been described in detail with reference to the drawings, but the present utility model is not limited thereto, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present utility model.

Claims (5)

1. A fuel cell engine system air tightness detection piping structure, characterized by comprising:

the connector (2) is provided with an air inlet passage and an air outlet passage, the two ends of the air inlet passage are respectively communicated with an air inlet pipe (1) and an air delivery pipe (6), a medium pressure sensor (4) for detecting the air pressure of the air inlet passage is arranged on the connector (2), the air inlet passage of the connector (2) is communicated with a pressure detection assembly, and a manual switch valve (7) is arranged on the air delivery pipe (6);

The five-way joint (8) is provided with an air inlet end, an air outlet end and three split ends, the air inlet end is communicated with the air delivery pipe (6), the air inlet end is provided with a proportional valve a (9), the three split ends are respectively communicated with a throttle valve (10), the three throttle valves (10) are respectively communicated with a throttle valve joint a (11) and two throttle valve joints b (13), the throttle valve joints a (11) and the throttle valve joints b (13) are respectively communicated with a pipe joint (14), and the pipe joint (14) is communicated with a split pipe which is communicated with a fuel cell engine system;

and the return pipe structure is communicated with the air outlet end of the five-way joint (8).

2. A fuel cell engine system air tightness detecting pipe structure according to claim 1, wherein the pressure detecting assembly comprises a pressure gauge (3) and a connection pipe (31) that communicates the pressure gauge (3) with the intake passage of the joint (2).

3. The fuel cell engine system airtight detection pipeline structure according to claim 2, wherein a pressure sensor (12) is arranged on a throttle valve connector a (11), a pipe joint (14) corresponding to the throttle valve connector a (11) is communicated with a shunt pipe a (15), the shunt pipe a (15) is communicated with a hydrogen system of the fuel cell engine system, two pipe joints (14) corresponding to two throttle valve connectors b (13) are respectively communicated with a shunt pipe b (16) and a shunt pipe c (17), the shunt pipe b (16) is communicated with an air system of the fuel cell engine system, and the shunt pipe c (17) is communicated with a thermal management system of the fuel cell engine system.

4. A fuel cell engine system airtight detecting piping structure according to claim 3, wherein the return piping structure comprises a three-way joint (19), a return pipe (18) communicating between an air outlet end of the five-way joint (8) and one end of the three-way joint (19), a communicating pipe a (20) and a communicating pipe b (22) communicating with the remaining two ends of the three-way joint (19), respectively, a collecting pipe (24) having two air inlets and one air outlet, a proportional valve b (21) provided between the communicating pipe a (20) and one air inlet of the collecting pipe (24), and a shutoff valve (23) provided between the communicating pipe b (22) and the other air inlet of the collecting pipe (24).

5. The fuel cell engine system airtight detection pipeline structure according to claim 4, wherein the gas outlet of the collecting pipe (24) is communicated with one end of a gas outlet passage of the joint (2), and the other end of the gas outlet passage is communicated with a gas outlet pipe (5).