Air path connecting structure of fuel cell BOP test bench

Abstract

The utility model relates to the field of fuel cells, in particular to an air path connecting structure of a fuel cell BOP test bench. The system comprises an air inlet pipeline, a tail exhaust main path, an air compressor air inlet pipeline, an air compressor air outlet pipeline, an intercooler air inlet pipeline, an intercooler air outlet pipeline, an air compressor turbine inlet pipeline, an air compressor turbine outlet pipeline, an air compressor purging pipeline, an air filter, an intercooler and a tail exhaust. The air filter, the air inlet pipeline and the air compressor air inlet pipeline are communicated in sequence; the air compressor emptying pipeline, the intercooler, the tail exhaust main path and the tail exhaust are communicated in sequence; the intercooler air inlet pipeline is communicated with the air compressor air outlet pipeline in parallel; and the intercooler emptying pipeline, the air compressor turbine inlet pipeline, the air compressor turbine outlet pipeline and the air compressor purging pipeline are respectively communicated with the tail exhaust main path. The device is small in occupied space, low in cost, capable of effectively reducing repeated labor of personnel, suitable for a high-temperature environment and short in test period.

Description

Technical Field

[0001] The utility model relates to the field of fuel cells, in particular to an air path connection structure of a fuel cell BOP test bench. Background Art

[0002] The BOP (Balance Of Plant) fuel cell auxiliary system is an auxiliary device configured for the fuel cell stack. At the same time, under the control of the fuel cell control unit, the normal operation of the fuel cell is achieved, and together they constitute the fuel cell system. The BOP mainly consists of an air supply system, a hydrogen circulation system, a water and heat management system, and a control system. After a lot of research, it is shown that the key factors affecting the life of the fuel cell are: dynamic conditions, starting, continuous idling, etc. These factors are ultimately determined by the control system. With the expansion of platform projects, the verification requirements for BOP components have increased, and the requirements for BOP component adaptation testing have also become higher.

[0003] At present, the BOP test bench is generally built with individual components, assembled by trial production and dismantled after the test is completed, and a multi-section 3A-level quick-install connection method is used to ensure that the entire system is sealed and operates stably. However, there are the following problems:

[0004] The BOP test bench is built independently for each component, which is assembled by trial production and dismantled after the test is completed. There is serious duplication of labor. The assembled and dismantled bench takes up a huge space in the laboratory, which is contrary to the principle of lean management. The high temperature environment generated by the BOP air compressor test may cause the sealing function of the multi-stage 3A-level quick-install structure to fail. There is a waste of cost in both manpower and material resources, which affects the project development cycle. There is a serious lack of flexibility, which may hinder the project nodes and is not conducive to the operation of the enterprise. Utility Model Content

[0005] The utility model aims to solve the problems existing in the background technology and proposes an air path connection structure of a fuel cell BOP test bench, which occupies a small space, has low cost, effectively reduces the repetitive work of personnel, can be applied to high temperature environment, and has a short test cycle.

[0006] The technical solution of the utility model is an air path connection structure of a fuel cell BOP test bench, including an air intake pipeline, a tail exhaust main pipeline, an air compressor air intake pipeline, an air compressor air outlet pipeline, an intercooler air intake pipeline, an intercooler air outlet pipeline, an air compressor turbine intake pipeline, an air compressor turbine outlet pipeline, an air compressor purge pipeline, an air filter, an intercooler and a tail exhaust; the air filter, the air intake pipeline and the air compressor air intake pipeline are connected in sequence; the air compressor air outlet pipeline, the intercooler, the tail exhaust main pipeline and the tail exhaust are connected in sequence ; The intercooler air inlet pipeline is connected in parallel with the air compressor air outlet pipeline; the intercooler air outlet pipeline, the air compressor turbine inlet pipeline, the air compressor turbine outlet pipeline and the air compressor purge pipeline are respectively connected to the tail exhaust main pipeline; the air compressor air inlet pipeline has an interface a, the air compressor air outlet pipeline has an interface b, the intercooler air inlet pipeline has an interface c, the intercooler air outlet pipeline has an interface d, the air compressor turbine inlet pipeline has an interface e, the air compressor turbine outlet pipeline has an interface f, and the air compressor purge pipeline has an interface g.

[0007] Preferably, the overall height dimension of the air path connection structure is greater than the width dimension.

[0008] Preferably, interface a, interface b, interface c, interface d, interface e, interface f and interface g are flush.

[0009] Preferably, temperature sensors and pressure sensors are provided on the air compressor air inlet pipeline, air compressor air outlet pipeline, intercooler air inlet pipeline, intercooler air outlet pipeline, air compressor turbine inlet pipeline, air compressor turbine outlet pipeline, air compressor purge pipeline and tail exhaust main pipeline.

[0010] Preferably, a manual switch valve and an air flow meter a are provided on the intake pipe, a throttle a, a pneumatic switch valve a and a throttle c are provided in sequence on the tail exhaust main line in the ventilation direction, a throttle b is provided at the connection point between the air compressor turbine inlet pipe and the tail exhaust main line, an air flow meter b is provided on the air compressor purge pipe, and a pneumatic switch valve b is provided between the tail exhaust main line and the tail exhaust.

[0011] Preferably, the air intake pipeline, tail exhaust main pipeline, air compressor air inlet pipeline, air compressor air outlet pipeline, intercooler air inlet pipeline, intercooler air outlet pipeline, air compressor turbine inlet pipeline, air compressor turbine outlet pipeline and air compressor purge pipeline are all segmented pipelines, and adjacent segments are sealed and connected at the ends by quick-release connectors.

[0012] Preferably, the quick connector includes a connecting buckle a which is semi-annular and has a limiting groove, a connecting buckle b which is semi-annular and has one end rotatably connected to the connecting buckle a, a screw rotatably arranged at the outer end of the connecting buckle b, a knob which is threadably connected to the screw and abuts against the side of the limiting groove, and a sealing gasket located between adjacent sections.

[0013] Preferably, the connection between adjacent sections in the air outlet pipeline of the air compressor and the air inlet pipeline of the intercooler through quick-release connectors is replaced by welding connections between adjacent sections.

[0014] Compared with the prior art, the utility model has the following beneficial technical effects:

[0015] The utility model realizes the conduction of components such as air filter, air compressor, intercooler, tail exhaust, etc., and connects manual switch valve and pneumatic switch valve to control the flow field, uses air flow meter, temperature sensor and pressure sensor to monitor the flow field, and transmits it to the host computer. The overall size of the air path connection structure of the BOP test bench is small, and the longitudinal space is fully utilized. Through structural improvement and loop opening and closing control, the repetitive work of personnel is effectively reduced, and it can be applied to high temperature environment. With better cost and shorter test cycle, it can effectively guarantee the key nodes of enterprise projects and ensure the stable operation of the project. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the embodiment of the utility model from the front side perspective;

[0017] Figure 2 This is a schematic diagram of the structure of an embodiment of the utility model from a rear side perspective;

[0018] Figure 3 This is a structural diagram of the air compressor outlet pipe and the intercooler air inlet pipe connected by quick-connect connectors;

[0019] Figure 4 This is a structural schematic diagram of the welding connection between the air compressor outlet pipe and the intercooler air inlet pipe.

[0020] Figure numerals: 100, air intake pipe; 200, tail exhaust main line; 1, air compressor air intake pipe; 101, interface a; 2, air compressor air outlet pipe; 201, interface b; 3, intercooler air intake pipe; 301, interface c; 4, intercooler air outlet pipe; 401, interface d; 5, air compressor turbine intake pipe; 501, interface e; 6, air compressor turbine outlet pipe; 601, interface f; 7 , air compressor purge pipeline; 701, interface g; 8, air filter; 9, manual switch valve; 10, air flow meter a; 11, intercooler; 12, throttle a; 13, throttle b; 14, pneumatic switch valve a; 15, throttle c; 16, pneumatic switch valve b; 17, tail exhaust; 18, air flow meter b; 19, connecting buckle a; 20, connecting buckle b; 21, screw; 22, knob. DETAILED DESCRIPTION

[0021] Embodiment 1

[0022] like Figure 1-Figure 3As shown, the air path connection structure of a fuel cell BOP test bench proposed in this embodiment includes an air intake pipeline 100, a tail exhaust main pipeline 200, an air compressor air inlet pipeline 1, an air compressor air outlet pipeline 2, an intercooler air inlet pipeline 3, an intercooler air outlet pipeline 4, an air compressor turbine inlet pipeline 5, an air compressor turbine outlet pipeline 6, an air compressor purge pipeline 7, an air filter 8, an intercooler 11 and a tail exhaust 17.

[0023] The air filter 8, the air intake line 100 and the air compressor air intake line 1 are connected in sequence; the air compressor air outlet line 2, the intercooler 11, the tail exhaust main line 200 and the tail exhaust 17 are connected in sequence; the intercooler air intake line 3 is connected in parallel with the air compressor air outlet line 2; the intercooler air outlet line 4, the air compressor turbine inlet line 5, the air compressor turbine outlet line 6 and the air compressor purge line 7 are respectively connected to the tail exhaust main line 200.

[0024] The air compressor air inlet pipe 1 has an interface a101, the air compressor air outlet pipe 2 has an interface b201, the intercooler air inlet pipe 3 has an interface c301, the intercooler air outlet pipe 4 has an interface d401, the air compressor turbine inlet pipe 5 has an interface e501, the air compressor turbine outlet pipe 6 has an interface f601, and the air compressor purge pipe 7 has an interface g701.

[0025] The overall height of the air path connection structure is greater than the width, and the overall distribution is longitudinal, which takes up little space. On the basis of ensuring applicable functions, combined with the requirements of lean management, the longitudinal space of the laboratory is used to the maximum extent. This structure realizes the length of the front section of the air flow meter A10 is 664mm, and the rear section is 325mm, and other pipelines are folded and extended upward to make full use of the longitudinal space. The equipment area originally planned to be 6m×2m was reduced to 3m×2m, and sufficient space was reserved for subsequent functional expansion.

[0026] Interface a101, interface b201, interface c301, interface d401, interface e501, interface f601 and interface g701 are flush and connected to the air compressor under test. There are 7 test interfaces in total, which are concentrated in the adjacent area of ​​the panel and arranged according to the correlation, so as to facilitate the identification, connection or disassembly of the interfaces of the tested parts during the experiment, improve the operability and overall work efficiency, and enhance the human-machine effect. When arranged specifically, interface a101, interface d401, interface b201 and interface c301 are arranged in rows horizontally, and interface f601, interface g701 and interface e501 are arranged in rows horizontally, and the rows of interfaces are located above the above 4 interfaces arranged in rows horizontally.

[0027] Temperature sensors and pressure sensors are provided on the air compressor air inlet pipeline 1, the air compressor air outlet pipeline 2, the intercooler air inlet pipeline 3, the intercooler air outlet pipeline 4, the air compressor turbine inlet pipeline 5, the air compressor turbine outlet pipeline 6, the air compressor purge pipeline 7 and the tail exhaust main pipeline 200. Among them, the temperature sensor and pressure sensor on the tail exhaust main pipeline 200 are close to the output end of the intercooler 11, and the sensors on the other pipelines are all located near the corresponding pipeline end interfaces.

[0028] The intake pipe 100 is provided with a manual switch valve 9 and an air flow meter a10, the tail exhaust main line 200 is provided with a throttle a12, a pneumatic switch valve a14 and a throttle c15 in sequence along the ventilation direction, a throttle b13 is provided at the connection point between the compressor turbine intake pipe 5 and the tail exhaust main line 200, an air flow meter b18 is provided on the compressor purge pipe 7, and a pneumatic switch valve b16 is provided between the tail exhaust main line 200 and the tail exhaust 17. The connection at both ends of the air flow meter and the pneumatic switch valve is sealed by a CF flange.

[0029] This air path connection structure realizes the control capability of three-out and four-in, corresponding to seven interfaces in the tested area. The air enters the equipment through the air filter 8, enters the first section manual switch valve 9 and the reserved function expansion area in parallel with it (the expansion area is the reserved area for upgrading and transformation, which is normally closed by the sealing plate), and then passes through the air flow meter a10, a set of temperature sensors and pressure sensors, and then enters the tested part (air compressor) through the interface a101 of the air compressor air inlet pipeline 1. The gas of the tested air compressor passes through the air compressor air outlet pipeline 2 equipped with a set of temperature sensors and pressure sensors and enters the intercooler 11. The intercooled gas passes through the temperature sensor, pressure sensor and throttle a12, and then passes through a set of temperature sensors and pressure sensors, and then goes out of the equipment through the interface d401; the interface c301 is the air compressor (intercooler 11) air inlet interface; the above are the four interfaces in the lower row.

[0030] Among the three interfaces in the upper row, the intercooler passes through a throttle valve a12, and then passes through a group of temperature sensors and pressure sensors, forming a flow path from the intercooler to the air compressor turbine inlet, that is, the air compressor turbine inlet pipeline 5; passes through a group of temperature sensors and pressure sensors, forming a flow path from the air compressor turbine outlet to the tail exhaust main road 200, that is, the air compressor turbine outlet pipeline 6; for the middle interface g701 in the upper row, it passes through an air flow meter b18 to the tail exhaust main road 200, forming a flow path of the air compressor purge port, that is, the air compressor purge pipeline 7.

[0031] like Figure 1 and Figure 2As shown, the air intake pipeline 100, the tail exhaust main pipeline 200, the air compressor air intake pipeline 1, the air compressor air outlet pipeline 2, the intercooler air intake pipeline 3, the intercooler air outlet pipeline 4, the air compressor turbine intake pipeline 5, the air compressor turbine outlet pipeline 6 and the air compressor purge pipeline 7 are all segmented pipelines, and the adjacent segments are sealed and connected at the ends by quick-release joints. PTFE (polytetrafluoroethylene) sealing gaskets are used in the air compressor outlet connection section to increase the temperature resistance of the regional structure from 60-70°C to 180°C.

[0032] like Figure 3 As shown, the quick connector includes a semi-circular connecting buckle a19 with a limiting groove, a semi-circular connecting buckle b20 with one end rotatably connected to the connecting buckle a19, a screw rod 21 rotatably arranged at the outer end of the connecting buckle b20, a knob 22 threadedly connected to the screw rod 21 and abutting against the side of the limiting groove, and a sealing gasket located between adjacent segments. When disassembling the quick connector, the knob 22 is unscrewed outward, the knob 22 and the screw rod 21 are rotated, and the screw rod 21 is moved away from the inner side of the limiting groove, so that the connecting buckle a19 and the connecting buckle b20 can be disassembled. The quick connector can be disassembled with simple tools or even without tools, and is human-centered, which is convenient for overall installation, control, and replacement.

[0033] This embodiment realizes the conduction of components such as air filter 8-air compressor-intercooler 11-tail exhaust 17, and connects the manual switch valve 9 and the pneumatic switch valve to control the flow field, and uses the air flow meter, temperature sensor and pressure sensor to monitor the flow field and transmit it to the host computer. The overall size of the air path connection structure of the BOP test bench is small, and the longitudinal space is fully utilized. Through structural improvements and the opening and closing control of the loop, the repetitive work of personnel is effectively reduced, and it can be applied to high temperature environments. By improving the performance of a single component and merging the functions of multiple components, the stability of the overall function of the equipment is enhanced. It is more convenient, efficient and stable when in use, with better costs and shorter testing cycles, effectively guaranteeing the key nodes of the enterprise project and ensuring the stable operation of the project.

[0034] Embodiment 2

[0035] The present embodiment proposes an air path connection structure of a fuel cell BOP test bench. Compared with the first embodiment, in the present embodiment, Figure 4 As shown, the connection between the adjacent sections of the air compressor air outlet pipe 2 and the intercooler air inlet pipe 3 through quick-release joints is replaced by welding connections between adjacent sections. In this special high-temperature area, the processing requirements are improved, the welding points are increased, the corrugation compensation area is reduced, and the overall leakage points are reduced by 4, thereby improving the overall structural stability.

[0036] The implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. An air path connection structure of a fuel cell BOP test bench, characterized in that: It comprises an air intake pipeline (100), a tail exhaust main pipeline (200), an air compressor air intake pipeline (1), an air compressor air outlet pipeline (2), an intercooler air intake pipeline (3), an intercooler air outlet pipeline (4), an air compressor turbine intake pipeline (5), an air compressor turbine outlet pipeline (6), an air compressor purge pipeline (7), an air filter (8), an intercooler (11) and a tail exhaust (17); The air filter (8), the air intake pipeline (100) and the air compressor air intake pipeline (1) are connected in sequence; the air compressor air outlet pipeline (2), the intercooler (11), the tail exhaust main pipeline (200) and the tail exhaust (17) are connected in sequence; the intercooler air intake pipeline (3) and the air compressor air outlet pipeline (2) are connected in parallel; the intercooler air outlet pipeline (4), the air compressor turbine intake pipeline (5), the air compressor turbine outlet pipeline (6) and the air compressor purge pipeline (7) are respectively connected to the tail exhaust main pipeline (200); The air compressor air inlet pipeline (1) has an interface a (101), the air compressor air outlet pipeline (2) has an interface b (201), the intercooler air inlet pipeline (3) has an interface c (301), the intercooler air outlet pipeline (4) has an interface d (401), the air compressor turbine inlet pipeline (5) has an interface e (501), the air compressor turbine outlet pipeline (6) has an interface f (601), and the air compressor purge pipeline (7) has an interface g (701).

2. The air path connection structure of a fuel cell BOP test bench according to claim 1, characterized in that: The overall height dimension of the air path connection structure is greater than the width dimension.

3. The air path connection structure of a fuel cell BOP test bench according to claim 1, characterized in that: Interface a (101), interface b (201), interface c (301), interface d (401), interface e (501), interface f (601) and interface g (701) are flush.

4. The air path connection structure of a fuel cell BOP test bench according to claim 3, characterized in that: Temperature sensors and pressure sensors are provided on the air compressor air inlet pipeline (1), the air compressor air outlet pipeline (2), the intercooler air inlet pipeline (3), the intercooler air outlet pipeline (4), the air compressor turbine inlet pipeline (5), the air compressor turbine outlet pipeline (6), the air compressor purge pipeline (7) and the tail exhaust main pipeline (200).

5. The air path connection structure of a fuel cell BOP test bench according to claim 4, characterized in that: A manual switch valve (9) and an air flow meter a (10) are arranged on the air intake pipeline (100); a throttle valve a (12), a pneumatic switch valve a (14) and a throttle valve c (15) are arranged in sequence along the ventilation direction on the tail exhaust main pipeline (200); a throttle valve b (13) is arranged at the connection point between the air compressor turbine intake pipeline (5) and the tail exhaust main pipeline (200); an air flow meter b (18) is arranged on the air compressor purge pipeline (7); and a pneumatic switch valve b (16) is arranged between the tail exhaust main pipeline (200) and the tail exhaust (17).

6. The air path connection structure of a fuel cell BOP test bench according to claim 1, characterized in that: The air intake pipeline (100), the tail exhaust main pipeline (200), the air compressor air inlet pipeline (1), the air compressor air outlet pipeline (2), the intercooler air inlet pipeline (3), the intercooler air outlet pipeline (4), the air compressor turbine inlet pipeline (5), the air compressor turbine outlet pipeline (6) and the air compressor purge pipeline (7) are all segmented pipelines, and adjacent segments are sealed and connected at the ends by quick-release joints.

7. The air path connection structure of a fuel cell BOP test bench according to claim 6, characterized in that: The quick-release connector comprises a semi-circular connecting buckle a (19) having a limiting groove, a semi-circular connecting buckle b (20) having one end rotatably connected to the connecting buckle a (19), a screw rod (21) rotatably arranged at the outer end of the connecting buckle b (20), a knob (22) threadedly connected to the screw rod (21) and abutting against the side of the limiting groove, and a sealing pad located between adjacent segments.

8. The air path connection structure of a fuel cell BOP test bench according to claim 6, characterized in that: The connection between adjacent sections in the air compressor air outlet pipeline (2) and the intercooler air inlet pipeline (3) through quick-release joints is replaced by welding between adjacent sections.

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