CN214698531U

CN214698531U - A hydrogen injector for fuel cells

Info

Publication number: CN214698531U
Application number: CN202121411612.1U
Authority: CN
Inventors: 范爱民; 范德新; 叶长流; 丘利芳
Original assignee: Shunde Polytechnic
Current assignee: Shunde Polytechnic
Priority date: 2021-06-24
Filing date: 2021-06-24
Publication date: 2021-11-12
Anticipated expiration: 2031-06-24

Abstract

The utility model discloses a hydrogen injector for fuel cells, which relates to the field of fuel cells. The utility model comprises an ejector body, a mixing cavity, an injection pipe and a base, one end of the ejector body is fixed with the base, the other end of the ejector body is fixed with the mixing cavity, and the mixing cavity is far away from the ejector body. One end is fixed with the injection pipe; the upper end of the ejector body is fixed with a hydrogen gas inlet pipe, the upper end of the mixing chamber is fixed with a hydrogen injection pipe, the interior of the base is rotatably connected with a rotating rod, the top of the base is fixed with a driving motor, and the The output end is fixed with the rotating rod. Through the design of the connection structure, the utility model enables the device to effectively avoid the contact between hydrogen and electricity, thereby reducing the risk of device explosion. Through the overall structural design of the device, the device has a simpler structure, is easy to produce, and reduces the cost required for production. .

Description

Hydrogen ejector for fuel cell

Technical Field

The utility model belongs to the fuel cell field especially relates to a hydrogen ejector for fuel cell.

Background

In the hydrogen fuel cell system, after hydrogen is reacted by the electric pile, part of the hydrogen does not participate in the reaction, and the part of the hydrogen needs to enter the electric pile again for reaction;

the most common method is to use a hydrogen circulating pump, but the ejector is used as an alternative due to the complex structure, large volume and high price. The existing hydrogen ejector of the fuel cell system mainly comprises the following two types: one type is an ejector with a throttle opening with a constant flow area, but the ejection performance of the ejector is difficult to meet the requirement of a fuel cell system on wide-range flow pressure; the other type is an ejector which controls the diameter of the throttling opening by driving a valve through a motor, although the requirement of a fuel cell system on wide-range flow pressure can be met, the structure of the ejector has the defect of contact between hydrogen and electricity, the risk of explosion is caused, and the structure is too complex.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a hydrogen ejector for fuel cell to current problem has been solved: the motor drives the valve to control the ejector of the throttling orifice diameter, and although the ejector can meet the requirement of a fuel cell system on wide-range flow pressure, the structure of the ejector has the defect of contact between hydrogen and electricity, and the ejector has the risk of explosion.

In order to solve the technical problem, the utility model discloses a realize through following technical scheme: a hydrogen ejector for a fuel cell comprises an ejector body, a mixing cavity, an injection pipe and a base, wherein one end of the ejector body is fixed with the base, the other end of the ejector body is fixed with the mixing cavity, and one end, far away from the ejector body, of the mixing cavity is fixed with the injection pipe;

a hydrogen inlet pipe is fixed at the upper end of the ejector body, an ejection hydrogen pipe is fixed at the upper end of the mixing cavity, a rotating rod is rotatably connected inside the base, a driving motor is fixed at the top of the base, the output end of the driving motor is fixed with the rotating rod, a connecting plate is slidably connected to the inner side of the ejector body and close to one end of the base, an adjusting groove is fixed inside the ejector body and close to one end of the mixing cavity, a push rod is fixed on one side of the connecting plate close to the adjusting groove, the push rod and the adjusting groove are in clearance fit, a first connecting rod is rotatably connected to one side of the connecting plate far away from the push rod, and one end of the first connecting rod far away from the connecting plate is rotatably connected with the rotating rod;

the inside of mixing the cavity is fixed with the mount, the inside sliding connection of mount has the second connecting rod, the one end that the second connecting rod is close to the adjustment tank is fixed with adjusting piston, adjusting piston and adjustment tank are plug-in connection, be fixed with the elastic component between adjusting piston and the mount.

Further, the elastic member is a compression spring.

Further, the fixing frame and the mixing cavity are fixed in a welding mode, and the adjusting groove and the ejector body are fixed in a welding mode.

Further, the ejector body and the base are fixedly welded, the ejector body and the mixing cavity are fixed through screws, and the injection pipe and the mixing cavity are fixed through screws.

Further, the driving motor and the base are fixed through screws.

Further, the junction of connecting plate and first connecting rod, dwang all rotate with the junction of first connecting rod and be connected with the connecting block, the dwang all rotates through the connecting block with head rod, connecting plate and head rod to be connected.

The utility model discloses following beneficial effect has:

1. the utility model discloses a connection structure's design for hydrogen and electrical contact can be avoided effectively to the device, has reduced the risk of device explosion.

2. The utility model discloses a device holistic structural design for the device structure is comparatively simple, and easily production has reduced the required cost of production.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an exploded view of the overall structure of the present invention;

FIG. 3 is a sectional view of the overall structure of the present invention;

fig. 4 is a schematic view of the connection structure of the internal structure of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. an ejector body; 2. a mixing chamber; 3. an injection pipe; 4. a base; 5. a drive motor; 6. a hydrogen inlet pipe; 7. injecting a hydrogen pipe; 8. rotating the rod; 9. a first connecting rod; 10. a connecting plate; 11. a push rod; 12. an adjustment groove; 13. a fixed mount; 14. a second connecting rod; 15. an adjusting piston; 16. an elastic member.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention relates to a hydrogen injector for fuel cells, which includes an injector body 1, a mixing chamber 2, an injection pipe 3 and a base 4, wherein one end of the injector body 1 is fixed to the base 4, the other end of the injector body 1 is fixed to the mixing chamber 2, and one end of the mixing chamber 2 away from the injector body 1 is fixed to the injection pipe 3; the ejector body 1 and the base 4 are fixed by welding, the ejector body 1 and the mixing cavity 2 are fixed by screws, and the injection pipe 3 and the mixing cavity 2 are fixed by screws, so that the ejector body 1 and the base 4 are more stably connected, the ejector body 1 and the mixing cavity 2 are more conveniently installed, and the injection pipe 3 and the mixing cavity 2 are more conveniently installed;

a hydrogen inlet pipe 6 is fixed at the upper end of the ejector body 1, an ejection hydrogen pipe 7 is fixed at the upper end of the mixing cavity 2, a rotating rod 8 is rotatably connected inside the base 4, a driving motor 5 is fixed at the top of the base 4, and the driving motor 5 and the base 4 are fixed by screws, so that the driving motor 5 can be conveniently maintained when in failure; the output end of the driving motor 5 is fixed with the rotating rod 8, one end of the inner side of the ejector body 1, which is close to the base 4, is connected with a connecting plate 10 in a sliding manner, an adjusting groove 12 is fixed at one end of the inner side of the ejector body 1, which is close to the mixing cavity 2, and the adjusting groove 12 and the ejector body 1 are fixed in a welding manner, so that the connection between the adjusting groove 12 and the ejector body 1 is more stable; a push rod 11 is fixed on one side of the connecting plate 10 close to the adjusting groove 12, the push rod 11 is in clearance fit with the adjusting groove 12, a first connecting rod 9 is rotatably connected on one side of the connecting plate 10 far away from the push rod 11, and one end of the first connecting rod 9 far away from the connecting plate 10 is rotatably connected with the rotating rod 8; the connecting part of the connecting plate 10 and the first connecting rod 9 and the connecting part of the rotating rod 8 and the first connecting rod 9 are both rotatably connected with connecting blocks, the rotating rod 8 and the first connecting rod 9 as well as the connecting plate 10 and the first connecting rod 9 are both rotatably connected through the connecting blocks, so that the rotating rod 8 is pushed to move through the first connecting rod 9 when the connecting plate 10 rotates;

a fixing frame 13 is fixed inside the mixing cavity 2, and the fixing frame 13 and the mixing cavity 2 are welded and fixed, so that the fixing frame 13 and the mixing cavity 2 are connected more stably; a second connecting rod 14 is connected inside the fixed frame 13 in a sliding manner, an adjusting piston 15 is fixed at one end of the second connecting rod 14 close to the adjusting groove 12, and the adjusting piston 15 is in plug connection with the adjusting groove 12; an elastic element 16 is fixed between the adjusting piston 15 and the fixing frame 13, and the elastic element 16 is a compression spring, so that the adjusting piston 15 is pushed by the elastic element 16 to be reset.

One specific application of this embodiment is: a hydrogen gas inlet pipe 6 is connected with a gas supply system, an injection hydrogen pipe 7 is connected with injection hydrogen, the hydrogen enters the ejector body 1 through the hydrogen gas inlet pipe 6, the injection hydrogen enters the mixing cavity 2 through the injection hydrogen pipe 7, the hydrogen entering the ejector body 1 enters the mixing cavity 2 through an adjusting groove 12 to be mixed with the injection hydrogen, and finally the hydrogen is ejected through an ejection pipe 3;

when the hydrogen is regulated to be conveyed, the rotating rod 8 is driven to rotate by the driving motor 5 electrically connected with an external power supply, the rotating rod 8 is connected with the first connecting rod 9 and is connected with the connecting plate 10 by the first connecting rod 9, so that the connecting plate 10 is driven to move inside the ejector body 1 when the rotating rod 8 rotates, the push rod 11 is driven to push the regulating piston 15 by the movement of the connecting plate 10, the regulating piston 15 is pushed into the mixing cavity 2 by the push rod 11, the regulating piston 15 is separated from the regulating groove 12, the gap between the regulating piston 15 and the regulating groove 12 is increased, and the conveying of the hydrogen is further increased;

drive dwang 8 through start-up driving motor 5 and reverse, through dwang 8, the connection of head rod 9 and connecting plate 10, drive connecting plate 10 and push rod 11 and reset when making dwang 8 reverse, and then make adjusting piston 15 lose the atress, elastic deformation promotion adjusting piston 15 of rethread elastic component 16 resets, make adjusting piston 15 promote to adjusting groove 12 direction, reduce the gap between adjusting groove 12 and adjusting piston 15, and then the regulation of hydrogen flow is accomplished in the transport that has reduced hydrogen.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a hydrogen ejector for fuel cell, includes ejector body (1), mixes cavity (2), injection pipe (3) and base (4), its characterized in that: one end of the ejector body (1) is fixed with the base (4), the other end of the ejector body (1) is fixed with the mixing cavity (2), and one end, far away from the ejector body (1), of the mixing cavity (2) is fixed with the injection pipe (3);

the upper end of the ejector body (1) is fixed with a hydrogen inlet pipe (6), the upper end of the mixing cavity (2) is fixed with an ejector hydrogen pipe (7), the inner part of the base (4) is connected with a rotating rod (8) in a rotating manner, the top of the base (4) is fixed with a driving motor (5), the output end of the driving motor (5) is fixed with the rotating rod (8), one end of the inner side of the ejector body (1) close to the base (4) is connected with a connecting plate (10) in a sliding manner, one end of the inner part of the ejector body (1) close to the mixing cavity (2) is fixed with an adjusting groove (12), one side of the connecting plate (10) close to the adjusting groove (12) is fixed with a push rod (11), the push rod (11) is in clearance fit with the adjusting groove (12), one side of the connecting plate (10) far away from the push rod (11) is connected with a first connecting rod (9) in a rotating manner, one end of the first connecting rod (9) far away from the connecting plate (10) is rotatably connected with the rotating rod (8);

mix the inside of cavity (2) and be fixed with mount (13), the inside sliding connection of mount (13) has second connecting rod (14), the one end that second connecting rod (14) are close to adjustment tank (12) is fixed with adjusting piston (15), adjusting piston (15) and adjustment tank (12) are plug-in connection, be fixed with between adjusting piston (15) and mount (13) elastic component (16).

2. The hydrogen injector for a fuel cell according to claim 1, wherein: the elastic piece (16) is a compression spring.

3. The hydrogen injector for a fuel cell according to claim 1, wherein: the fixing frame (13) and the mixing cavity (2) are welded and fixed, and the adjusting groove (12) and the ejector body (1) are welded and fixed.

4. The hydrogen injector for a fuel cell according to claim 1, wherein: the ejector body (1) and the base (4) are fixed in a welding mode, the ejector body (1) and the mixing cavity (2) are fixed through screws, and the injection pipe (3) and the mixing cavity (2) are fixed through screws.

5. The hydrogen injector for a fuel cell according to claim 1, wherein: the driving motor (5) and the base (4) are fixed by screws.

6. The hydrogen injector for a fuel cell according to claim 1, wherein: the connecting plate (10) and the junction of head rod (9), dwang (8) and the junction of head rod (9) all rotate and are connected with the connecting block, dwang (8) and head rod (9), connecting plate (10) all rotate through the connecting block with head rod (9) and are connected.