CN213366634U

CN213366634U - Hydrogen supply device of fuel cell

Info

Publication number: CN213366634U
Application number: CN202022401309.5U
Authority: CN
Inventors: 赵文帅
Original assignee: Wuxi Wabertec Co ltd
Current assignee: Wuxi Wabertec Co ltd
Priority date: 2020-10-26
Filing date: 2020-10-26
Publication date: 2021-06-04
Anticipated expiration: 2030-10-26

Abstract

The utility model discloses a fuel cell's hydrogen supply device, supply with the block including hydrogen, grafting is equipped with switch solenoid valve and proportion solenoid valve above the block is supplied with to hydrogen, hydrogen supply with below the block and with the grafting of the corresponding department of proportion solenoid valve is equipped with external ejector. The utility model has the advantages that: the sealing device has the advantages of good reliability, durability, sealing performance, low noise, relatively low cost, convenience in processing and the like.

Description

Hydrogen supply device of fuel cell

Technical Field

The utility model relates to a fuel cell technical field specifically indicates a fuel cell's hydrogen supply device.

Background

The purpose of controlling hydrogen is basically realized by a proportional electromagnetic valve in the prior fuel cell technology, and the hydrogen is difficult to control under the conditions of low load and small flow.

Among the present hydrogen supply system, hydrogen recirculation scheme mainly has ejector and hydrogen circulating pump, and the hydrogen circulating pump has good circulation effect at the full operating mode within range, and initiatively adjustable, but ejector scheme simple structure, with low costs, the noise is little, does not have moving part, consequently has great advantage.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve foretell various problems, provide a fuel cell's hydrogen supply device who has good reliability, durability, leakproofness, the noise is little, and cost is cheap relatively, convenient processing.

In order to solve the technical problem, the utility model provides a technical scheme does: the utility model provides a fuel cell's hydrogen supply device, includes the hydrogen and supplies the block, the grafting is equipped with switch solenoid valve and proportion solenoid valve above the hydrogen supplies the block, below the hydrogen supply block and with the corresponding department of proportion solenoid valve is pegged graft and is equipped with external ejector.

As a modification, a main hydrogen passage is arranged on one side surface of the hydrogen supply block body and extends into the hydrogen supply block body, a first through hole and a second through hole are arranged on the hydrogen supply block body, the first through hole is communicated with the hydrogen main channel, the second through hole penetrates through the upper surface and the lower surface of the hydrogen supply block body, a valve seat of a switch electromagnetic valve is arranged in the first through hole and close to the lower end, the switch electromagnetic valve is inserted into the first through hole and matched with the switch electromagnetic valve seat, an inclined hole I is communicated between one end of the hydrogen main passage close to one side surface of the hydrogen supply block body and the through hole I, an ejector bypass hole communicated with the through hole two-phase is arranged on the other side surface of the hydrogen supply block body, the external ejector is inserted below the second through hole, the proportional solenoid valve is inserted above the second through hole, and a second inclined hole is communicated between the hydrogen main passage and the second through hole.

As an improvement, a sealing bolt is installed in the hydrogen main passage.

In an improvement, an O-shaped sealing ring is arranged between the contact surfaces of the sealing bolt and the hydrogen main passage.

As a modification, an O-shaped ring groove is arranged below the hydrogen supply block body and around the through hole II.

As an improvement, the lower end of the through hole is provided with an ejector limiting hole, and the external ejector is inserted into the ejector limiting hole.

Compared with the prior art, the utility model the advantage lie in: the utility model discloses when using, be equipped with hydrogen and supply with piece and external ejector, supply with unit inner tube way and control through a hydrogen switch solenoid valve and a proportion solenoid valve, simple structure, the compactness, it is reasonable, good reliability, durability, leakproofness have, the noise is little, cost is cheap relatively, convenient processing. Wherein the switch solenoid valve can realize the first level control of hydrogen, and the proportional solenoid valve can realize the second level control of hydrogen, keeps the switch solenoid valve to normally open when medium and large load and provides the hydrogen supply of steady pressure, and the accurate hydrogen tolerance of control demand of rethread second level proportional solenoid valve can in time cut off the supply of hydrogen effectively according to the demand through the PWM control of switch solenoid valve when the small load, and rethread control proportional solenoid valve electric current can realize accurate hydrogen supply under the miniwatt. The proportional solenoid valve export is equipped with the variable cross section shower nozzle, can improve export gas flow rate, reduces near pressure simultaneously, forms the negative pressure around, realizes the mixing of the unreacted hydrogen of fuel cell export and fresh hydrogen, and the rethread external ejector gets into the pile, improves the cyclic utilization of hydrogen. Supply with the unit internal piping and communicate with each other, processing is convenient, and can two solenoid valves of independent control, conveniently detects the sealed condition of two solenoid valves on the one hand, and on the other hand can realize the hydrogen volume of demand through the PWM frequency and duty cycle and the proportion solenoid valve of demarcation switch solenoid valve.

Drawings

Fig. 1 is a schematic structural diagram of a hydrogen supply device for a fuel cell according to the present invention.

Fig. 2 is a schematic diagram of a hydrogen supply block structure of a hydrogen supply device of a fuel cell according to the present invention.

As shown in the figure: 1. a hydrogen supply block; 2. switching on and off the electromagnetic valve; 3. a proportional solenoid valve; 4. an ejector is externally connected; 5. a seal bolt; 6. a valve seat of the switch electromagnetic valve; 7. an O-shaped sealing ring; 8. a hydrogen main passage; 9. a first inclined hole; 10. a second inclined hole; 11. an ejector limit hole; 12. an ejector bypass hole; 13. an O-shaped ring groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

With reference to fig. 1 and 2, the hydrogen supply device for the fuel cell comprises a hydrogen supply block 1, wherein a switch electromagnetic valve 2 and a proportion electromagnetic valve 3 are inserted into the hydrogen supply block 1, and an external ejector 4 is inserted into a position below the hydrogen supply block 1 and corresponding to the proportion electromagnetic valve 3.

A hydrogen main passage 8 is arranged on one side surface of the hydrogen supply block body 1 and extends to the inside of the hydrogen supply block body 1, a first through hole and a second through hole are arranged on the upper surface of the hydrogen supply block body 1, the first through hole is communicated with the hydrogen main passage 8, the second through hole penetrates through the upper surface and the lower surface of the hydrogen supply block body 1, a switch electromagnetic valve seat 6 is arranged at the position close to the lower end in the first through hole, a switch electromagnetic valve 2 is inserted into the first through hole and matched with the switch electromagnetic valve seat 6, an inclined hole 9 is communicated between one end of the hydrogen main passage 8 close to one side surface of the hydrogen supply block body 1 and the first through hole, an ejector bypass hole 12 communicated with the second through hole is arranged on the other side surface of the hydrogen supply block body 1, an external ejector 4 is inserted below the second through hole, and a proportional electromagnetic valve 3 is inserted above the second through hole, and a second inclined hole 10 is communicated between the hydrogen main passage 8 and the second through hole.

And a sealing bolt 5 is arranged in the hydrogen main passage 8.

An O-shaped sealing ring 7 is arranged between the surfaces of the sealing bolt 5, which are in contact with the hydrogen main passage 8.

An O-shaped ring groove 13 is arranged below the hydrogen supply block body 1 and around the through hole II.

And the lower end of the through hole II is provided with an ejector limiting hole 11, and the external ejector 4 is inserted into the ejector limiting hole 11.

The utility model discloses a concrete implementation mode: the utility model discloses when using, switching solenoid valve 2 can realize the first order control of hydrogen, proportional solenoid valve 3 can realize the second level control of hydrogen, it provides the hydrogen supply of steady pressure to keep switching solenoid valve 2 to normally open when the medium and large load, the hydrogen tolerance of 3 accurate control demands of rethread second level proportional solenoid valve, the supply of hydrogen can in time be cut off effectively according to the demand through switching solenoid valve 2's PWM control when the small load, 3 electric currents of rethread control proportional solenoid valve, accurate hydrogen is supplied with under can realizing the miniwatt. The outlet of the proportional solenoid valve 3 is provided with a variable cross-section nozzle, so that the flow rate of outlet gas can be improved, the pressure intensity near the outlet can be reduced, negative pressure is formed around the outlet, the mixing of unreacted hydrogen and fresh hydrogen at the outlet of the fuel cell is realized, and the unreacted hydrogen and the fresh hydrogen enter the galvanic pile through the external ejector 4, so that the hydrogen recycling rate is improved. Supply with the unit internal piping and communicate with each other, processing is convenient, and can two solenoid valves of independent control, conveniently detects the sealed condition of two solenoid valves on the one hand, and on the other hand can realize the hydrogen volume of demand through demarcation switch solenoid valve 2's PWM frequency and duty cycle and proportion solenoid valve 3.

The present invention and the embodiments thereof have been described above, but the description is not limited thereto, and the embodiment shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should understand that they should not be limited to the embodiments described above, and that they can design the similar structure and embodiments without departing from the spirit of the invention.

Claims

1. A hydrogen supply device of a fuel cell comprises a hydrogen supply block body (1) and is characterized in that a switch electromagnetic valve (2) and a proportion electromagnetic valve (3) are inserted on the hydrogen supply block body (1), and an external ejector (4) is inserted below the hydrogen supply block body (1) and at a position corresponding to the proportion electromagnetic valve (3).

2. A hydrogen supply device for a fuel cell according to claim 1, characterized in that: the hydrogen supply device is characterized in that a hydrogen main passage (8) is arranged on one side face of the hydrogen supply block body (1) and extends to the inside of the hydrogen supply block body (1), a first through hole and a second through hole are formed in the hydrogen supply block body (1), the first through hole is communicated with the hydrogen main passage (8), the second through hole penetrates through the upper face and the lower face of the hydrogen supply block body (1), a switch electromagnetic valve seat (6) is installed at the position, close to the lower end, in the first through hole, an switch electromagnetic valve (2) is inserted into the first through hole and matched with the switch electromagnetic valve seat (6), an inclined hole I (9) is communicated between one end, close to one side face of the hydrogen supply block body (1), of the hydrogen supply block body (1) and the first through hole, an ejector bypass hole (12) communicated with the second through hole is formed in the other side face of the hydrogen supply block body (1), and an external ejector (4) is, the proportional solenoid valve (3) is inserted on the second through hole, and a second inclined hole (10) is communicated between the hydrogen main passage (8) and the second through hole.

3. A hydrogen supply device for a fuel cell according to claim 2, characterized in that: and a sealing bolt (5) is arranged in the hydrogen main passage (8).

4. A hydrogen supply device for a fuel cell according to claim 3, characterized in that: an O-shaped sealing ring (7) is arranged between the surfaces of the sealing bolt (5) contacted with the hydrogen main passage (8).

5. A hydrogen supply device for a fuel cell according to claim 2, characterized in that: an O-shaped ring groove (13) is arranged below the hydrogen supply block body (1) and surrounds the through hole II.

6. A hydrogen supply device for a fuel cell according to claim 2, characterized in that: and the lower end of the through hole II is provided with an ejector limiting hole (11), and the external ejector (4) is inserted into the ejector limiting hole (11).