Hydrogen ejector

Abstract

The hydrogen ejector comprises a pipe body and a shell connected to the outer side of the pipe body in a sleeving mode, an electromagnetic assembly is contained between the shell and the pipe body, one end of the pipe body is connected with a conveying pipe, the other end of the pipe body is connected with a valve seat, and a valve rod is arranged in the pipe body in a sleeving mode; one end of the valve rod is axially provided with a hole to form a runner pipe, the other end of the valve rod is connected with the valve body, the valve rod close to the valve body is provided with a through hole to form a runner hole, a cavity is formed between the valve rod and the pipe body, high-pressure hydrogen enters the cavity through the runner pipe and the runner hole, and the valve rod drives the valve body to get away from or abut against the valve seat to control opening and closing of the nozzle opening; the armature is connected with the valve rod to control the nozzle opening to be opened and connected with the spring to control the nozzle opening to be closed. And a hydrogen storage bin is also arranged in the pipe body and is used for buffering hydrogen. According to the hydrogen ejector, the response speed of the electromagnetic valve is increased by increasing the pressure of high-pressure hydrogen, and meanwhile, the gas channel design meets the pressure reducing and speed increasing requirements of the high-pressure hydrogen; the hydrogen storage bin can provide continuous high-pressure hydrogen, and the response speed of the electromagnetic valve is further increased.

Description

Technical Field

[0001] The present application relates to the field of injectors, and in particular to a hydrogen injector. Background Art

[0002] The hydrogen injector is one of the key components of the fuel cell hydrogen supply system. It can be used to control and adjust parameters such as the pressure and flow of hydrogen entering the fuel cell stack. The hydrogen injector has the advantages of stable output pressure, linear adjustable flow and fast response speed. The high-pressure hydrogen storage tank stores hydrogen in a high-pressure state so that it can be transported to equipment such as hydrogen internal combustion engines, hydrogen fuel cells, hydrogen generators and hydrogen energy storage systems for reaction. The hydrogen in the high-pressure hydrogen storage tank passes through a pressure regulating valve to reduce the hydrogen pressure, and finally the pressure is reduced to the pressure range required for the fuel cell to work through a hydrogen injector to meet its working requirements. The increase in hydrogen pressure will increase the response speed of the solenoid valve, but it has higher requirements for the structure and material of the hydrogen injector.

[0003] Therefore, providing a hydrogen injector with a fast-response solenoid valve becomes a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0004] The main purpose of the present application is to provide a hydrogen injector, which improves the response speed of the solenoid valve through the structural setting of the hydrogen injector and has a simple structure.

[0005] A hydrogen injector comprises a tube body, a shell sleeved on the outside of the tube body, an electromagnetic assembly is accommodated between the shell and the tube body, one end of the tube body is connected to a delivery pipe, the other end is connected to a valve seat, and a valve stem is sleeved in the tube body;

[0006] One end of the valve stem is axially opened to form a flow pipe, and the other end of the valve stem is connected to the valve body. The valve stem is opened near the valve body to form a flow hole. A cavity is formed between the valve stem and the tube body. High-pressure hydrogen delivered by the delivery pipe enters the cavity through the flow pipe and the flow hole. The valve stem drives the valve body away from or against the valve seat to control the opening and closing of the nozzle.

[0007] The armature is connected to the valve stem. Under the magnetic force of the electromagnetic assembly, the armature drives the valve stem away from the nozzle opening to open the nozzle opening. The armature is connected to the spring on the side away from the valve body. After the magnetic force of the electromagnetic assembly disappears, the armature is driven to return to the initial position to close the nozzle opening.

[0008] Furthermore, the tube body also includes a hydrogen storage tank for buffering hydrogen, one side of the hydrogen storage tank is connected to the delivery pipe, and the other side is connected to the circulation pipe.

[0009] Furthermore, the hydrogen pressure transported by the delivery pipe is 1.5-2.0Mpa.

[0010] Furthermore, the opening size of the flow hole is related to the cross-sectional size of the flow tube or the hydrogen pressure.

[0011] Furthermore, the flow holes are evenly distributed along the circumferential direction of the valve stem, and the angle between the opening direction of the flow holes and the axis of the flow pipe is the same.

[0012] Furthermore, the flow hole is opened along the radial direction of the valve stem.

[0013] Furthermore, the valve stem is made of a high-pressure resistant material.

[0014] Furthermore, the valve body connected to the valve stem is a spherical valve body or a needle valve body.

[0015] Furthermore, the valve stem and the valve body are integrally formed.

[0016] Furthermore, the spring is located in a spring groove on the side of the armature away from the valve body, and the spring reduces vibration caused by the operation of the hydrogen injector.

[0017] Beneficial effects: The hydrogen injector in the present application improves the response speed of the solenoid valve through high-pressure hydrogen. At the same time, the gas channel design of the hydrogen injector meets the pressure reduction and speed increase requirements of high-pressure hydrogen; the hydrogen storage tank can provide continuous high-pressure hydrogen for the hydrogen injector, further improving the response speed of the solenoid valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional view of the hydrogen injector in this application.

[0019] Figure 2 This is a partial enlarged view of the hydrogen injector in this application. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described in the present application are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application. The hydrogen injector in the present application is described in detail in combination with the drawings.

[0021] like Figure 1 As shown, a hydrogen injector comprises a tube body 2, a shell 13 sleeved on the outside of the tube body 2, an electromagnetic assembly 12 is accommodated between the shell 13 and the tube body 2, one end of the tube body 2 is connected to a delivery pipe 1, and the other end is connected to a valve seat 91, and a valve stem 8 is sleeved inside the tube body 2;

[0022] One end of the valve stem 8 is axially opened to form a flow pipe 4, and the other end of the valve stem 8 is connected to the valve body 9. The valve stem 8 is opened near the valve body 9 to form a flow hole 5. A cavity 6 is formed between the valve stem 8 and the tube body 2. The high-pressure hydrogen delivered by the delivery pipe 1 enters the cavity 6 through the flow pipe 4 and the flow hole 5. The valve stem 8 drives the valve body 9 to move away from or contact the valve seat 91, thereby controlling the opening and closing of the nozzle port 7.

[0023] The flow holes 5 are evenly distributed along the circumferential direction of the valve stem 8, and the opening direction of the flow holes 5 is at the same angle as the axis of the flow tube 4, reducing the vibration caused by the vortex generated by the change in the flow direction of the hydrogen. In this embodiment, the opening direction of the flow holes 5 is at a 90-degree angle to the axis of the flow tube 4. In order to meet the needs of hydrogen circulation, the flow holes 5 are opened in the radial direction of the valve stem 8. The cross-sectional size of the flow tube 4 affects the flow rate and flow rate of hydrogen. A larger cross-section can reduce flow resistance, maintain a higher flow rate, and improve injection efficiency.

[0024] The material of the valve stem 8 is a high pressure resistant material, and in this application, stainless steel or polymer is used.

[0025] The valve body 9 connected to the valve stem 8 is a spherical valve body or a needle valve body. Figure 2 As shown, in the embodiment, the valve body 9 is a spherical valve body. When the spherical valve body 9 is away from the valve seat 91, a narrow passage is formed between the spherical valve body 9 and the valve seat 91, so that the hydrogen is accelerated when passing through the narrow passage. When the electromagnetic component 12 is powered off and the electromagnetic force disappears, the valve stem 8 is impacted by the high-pressure hydrogen, which enables the spherical valve body 9 to quickly complete the closing and blocking of the nozzle opening 7. In order to have a better sealing effect, the valve body 9 can use a needle valve body. High-pressure hydrogen has high requirements on the structure of the hydrogen injector. In order to improve the strength and durability of the valve stem 8 and the valve body 9, the valve stem 8 and the valve body 9 are integrally formed.

[0026] The armature 11 is connected to the valve stem 8. Under the magnetic force of the electromagnetic assembly 12, the armature 11 drives the valve stem 8 away from the nozzle opening 7 to open the nozzle opening 7. The armature 11 is connected to the spring 10 on the side away from the valve body 9. After the magnetic force of the electromagnetic assembly 12 disappears, the armature 11 is driven back to the initial position to close the nozzle opening. In this embodiment, the spring 10 is located in the spring groove 101 on the side of the armature 11 away from the valve body 9. The spring 10 reduces the vibration caused by the operation of the hydrogen injector.

[0027] In the above embodiments, the flow pipe 4 of the hydrogen injector directly passes through the high-pressure hydrogen delivered by the delivery pipe 1. In order to provide continuous high-pressure hydrogen for the hydrogen injector and further improve the response speed of the solenoid valve, the pipe body 2 in the embodiment also includes a hydrogen storage tank 3 for caching hydrogen. One side of the hydrogen storage tank 3 is connected to the delivery pipe 1 to store the high-pressure hydrogen delivered by the delivery pipe 1; the other side of the hydrogen storage tank 3 is connected to the flow pipe 4 to deliver high-pressure hydrogen. The greater the hydrogen pressure, the faster the response speed of the solenoid valve. The gas channel design of the hydrogen injector is used to improve the response speed and ensure that the ejected hydrogen is at the working pressure. The conventional hydrogen pressure delivered by the delivery pipe 1 is 1.0-1.5Mpa, and the moderate hydrogen pressure delivered by the present application is 1.5-2.0Mpa. The flow rate of hydrogen is proportional to the pressure. The higher the pressure of hydrogen than the conventional hydrogen pressure, the higher the flow rate and flow rate of hydrogen, and the greater the impact of the high-pressure hydrogen on the valve stem 8, and the faster the closing and blocking of the nozzle port 7.

[0028] The hydrogen injector in the present application improves the response speed of the solenoid valve through high-pressure hydrogen, and the matching gas channel design meets the pressure reduction and speed increase requirements of high-pressure hydrogen; the design of the hydrogen storage tank in the hydrogen injector can provide the hydrogen injector with continuous high-pressure hydrogen, further improving the response speed of the solenoid valve.

Claims

1. A hydrogen injector, characterized in that: It comprises a tube body (2), a shell (13) sleeved on the outside of the tube body (2), an electromagnetic assembly (12) being accommodated between the shell (13) and the tube body (2), one end of the tube body (2) being connected to a delivery pipe (1), and the other end being connected to a valve seat (91), and a valve stem (8) being sleeved inside the tube body (2); One end of the valve stem (8) is axially opened to form a flow pipe (4), and the other end of the valve stem (8) is connected to the valve body (9). The valve stem (8) is opened near the valve body (9) to form a flow hole (5). A cavity (6) is formed between the valve stem (8) and the tube body (2). High-pressure hydrogen gas transported by the transport pipe (1) enters the cavity (6) through the flow pipe (4) and the flow hole (5). The valve stem (8) drives the valve body (9) to move away from or contact the valve seat (91), thereby controlling the opening and closing of the nozzle opening (7); The armature (11) is connected to the valve stem (8). Under the magnetic force of the electromagnetic assembly (12), the armature (11) drives the valve stem (8) away from the nozzle opening (7), thereby opening the nozzle opening (7). The armature (11) is connected to the spring (10) at the side away from the valve body (9). After the magnetic force of the electromagnetic assembly (12) disappears, the armature (11) is driven to return to the initial position, thereby closing the nozzle opening (7).

2. The hydrogen injector according to claim 1, characterized in that: The pipe body (2) also includes a hydrogen storage bin (3) for buffering hydrogen; one side of the hydrogen storage bin (3) is connected to the delivery pipe (1) and the other side is connected to the circulation pipe (4).

3. The hydrogen injector according to claim 1, characterized in that: The hydrogen pressure transported by the transport pipe (1) is 1.5-2.0 MPa.

4. The hydrogen injector according to claim 1, characterized in that: The flow holes (5) are evenly distributed along the circumferential direction of the valve stem (8), and the opening direction of the flow holes (5) has the same angle as the axis of the flow pipe (4).

5. The hydrogen injector according to claim 4, characterized in that: The flow hole (5) is opened along the radial direction of the valve stem (8).

6. The hydrogen injector according to claim 1, characterized in that: The valve stem (8) is made of a high-pressure resistant material.

7. The hydrogen injector according to claim 1, characterized in that: The valve body (9) connected to the valve stem (8) is a spherical valve body or a needle valve body.

8. The hydrogen injector according to claim 1, characterized in that: The valve stem (8) and the valve body (9) are integrally formed.

9. The hydrogen injector according to claim 1, characterized in that: The spring (10) is located in a spring groove (101) on the side of the armature (11) away from the valve body (9), and the spring (10) reduces vibration caused by the operation of the hydrogen injector.

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