Proportional electromagnetic valve for hydrogen

Abstract

The utility model relates to a proportional electromagnetic valve for hydrogen, which belongs to the technical field of proportional electromagnetic valves and comprises a valve body and a valve seat, a hydrogen inlet and a hydrogen outlet are arranged on the surface of the valve seat, an electromagnetic iron core, a spring and an electromagnetic coil are connected in the valve body, and the electromagnetic coil is wound on the periphery of the electromagnetic iron core. One end of the electromagnetic iron core is connected with the spring, the other end of the electromagnetic iron core is connected with the valve seat, the electromagnetic coil can drive the electromagnetic iron core to be far away from the valve seat, so that the hydrogen inlet is communicated with the hydrogen outlet, and a wear-resistant sheath is connected to the contact portion of the inner wall of the valve body and the electromagnetic iron core. By additionally arranging the wear-resistant sheath, the wear resistance of the electromagnetic iron core in the moving process can be improved, the service life of the proportional electromagnetic valve can be effectively prolonged, meanwhile, the electromagnetic iron core can be prevented from deflecting in the moving process, the consistency of electromagnetic force is improved, and therefore the adjusting precision of the proportional electromagnetic valve is improved.

Description

Technical Field

[0001] The utility model relates to a proportional solenoid valve for hydrogen, in particular to a proportional solenoid valve for hydrogen with a long service life, which belongs to the technical field of proportional solenoid valves. Background Technique

[0002] The proportional solenoid valve for hydrogen is a high-precision valve used to control the hydrogen flow rate, which plays a key role in hydrogen energy and fuel cell systems. Chinese Utility Model Patent CN221221619U discloses a proportional solenoid valve, which includes a valve body with a valve body cavity, a valve seat arranged at one end of the valve body, a static iron core at least partially received in the valve body cavity and having an adjustment cavity and a moving iron core cavity, a moving iron core located in the moving iron core cavity, a coil located in the valve body cavity and surrounding the static iron core, an adjustment member located in the adjustment cavity and having a guide rod cavity, a guide rod extending into the guide rod cavity, a guide elastic member sleeved outside the guide rod and located between the moving iron core and the adjustment member, and a reed arranged at one end of the moving iron core and abutted against the inner wall of the static iron core. This patent discloses the basic structure of the proportional solenoid valve, but it cannot avoid the situation that the iron core deflects due to multiple uses, which affects the adjustment accuracy and service life and cannot meet the use requirements. Content of the Utility Model

[0003] Technical Objective: In order to overcome the deficiencies existing in the prior art, the utility model provides a proportional solenoid valve for hydrogen, which is provided with a wear-resistant sheath, can improve the wear resistance of the electromagnet iron core during movement, and can effectively improve the service life of the proportional solenoid valve.

[0004] Technical Solution: To achieve the above objective, a proportional solenoid valve for hydrogen disclosed by the utility model includes a valve body and a valve seat. The surface of the valve seat is provided with a hydrogen inlet and a hydrogen outlet. An electromagnet iron core, a spring and an electromagnetic coil are connected inside the valve body. The electromagnetic coil is wound around the periphery of the electromagnet iron core. One end of the electromagnet iron core is connected to the spring, and the other end is connected to the valve seat. The electromagnetic coil can drive the electromagnet iron core away from the valve seat, so that the hydrogen inlet and the hydrogen outlet are communicated. A wear-resistant sheath is connected to the contact part between the inner wall of the valve body and the electromagnet iron core.

[0005] Furthermore, a first cavity and a second cavity are arranged up and down inside the valve body. The spring is connected in the first cavity, the electromagnet iron core is connected in the second cavity, and the wear-resistant sheath is connected to the inner wall of the second cavity.

[0006] Furthermore, a guide rod is arranged at the connection end of the electromagnet iron core and the spring. The spring is sleeved and connected on the guide rod, and a magnetic isolation sheet is connected to the surface of the guide rod.

[0007] Furthermore, a wiring plug electrically connected to the electromagnetic coil is arranged on the surface of the valve body.

[0008] Furthermore, the cross-section of the first cavity is in a convex shape, an adjusting bolt matching its outer shape is connected inside the first cavity, and the spring is connected between the adjusting bolt and the electromagnet core.

[0009] Furthermore, a protective cap is connected to the valve body, and the protective cap covers the adjusting bolt; a sealing ring is provided at the connection between the valve body and the protective cap.

[0010] Furthermore, the inner diameter of the first cavity is smaller than the inner diameter of the second cavity.

[0011] Furthermore, a valve stem is provided at the connection end of the electromagnet core and the valve seat.

[0012] By adding a wear-resistant sheath, the present utility model can improve the wear resistance of the electromagnet core during movement, effectively improve the service life of the proportional solenoid valve, and also prevent the electromagnet core from yawing during movement, improving the consistency of the electromagnetic force, thereby improving the adjustment accuracy of the proportional solenoid valve; the compression amount of the initial position of the spring can be adjusted by the adjusting bolt, so as to realize the adjustment of the opening pressure of the proportional solenoid valve, which can meet different environmental pressures and usage requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0014] Figure 2 is a partial cross-sectional view (one) of the present utility model;

[0015] Figure 3 is a partial cross-sectional view (two) of the present utility model.

[0016] In the figure, 1, valve body; 2, valve seat; 3, hydrogen inlet; 4, hydrogen outlet; 5, electromagnet core; 6, spring; 7, electromagnetic coil; 8, wear-resistant sheath; 9, first cavity; 10, second cavity; 11, guide rod; 12, magnetic isolation sheet; 13, wiring plug; 14, adjusting bolt; 15, protective cap; 16, sealing ring; 17, valve stem. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The following describes the principles and features of the present utility model with reference to the appended Figure 1 to the appended Figure 3 The examples are only used to explain the present utility model and are not intended to limit the scope of the present utility model.

[0018] A proportional solenoid valve for hydrogen, comprising a valve body 1 and a valve seat 2. A hydrogen inlet 3 and a hydrogen outlet 4 are arranged on the surface of the valve seat 2. An electromagnet core 5, a spring 6 and an electromagnetic coil 7 are connected inside the valve body 1. The electromagnetic coil 7 is wound around the periphery of the electromagnet core 5. One end of the electromagnet core 5 is connected to the spring 6, and the other end is connected to the valve seat 2. The electromagnetic coil 7 can drive the electromagnet core 5 away from the valve seat 2, causing the hydrogen inlet 3 and the hydrogen outlet 4 to communicate. A wear-resistant sheath 8 is connected to the contact part between the inner wall of the valve body 1 and the electromagnet core 5; adding the wear-resistant sheath 8 can improve the wear resistance of the electromagnet core 5 during movement and extend the service life.

[0019] A first cavity 9 and a second cavity 10 are arranged up and down inside the valve body 1. The spring 6 is connected in the first cavity 9, the electromagnet core 5 is connected in the second cavity 10, and the wear-resistant sheath 8 is connected to the inner wall of the second cavity 10.

[0020] A guide rod 11 is arranged at the connection end of the electromagnet core 5 and the spring 6. The spring 6 is sleeved and connected on the guide rod 11. A magnetic isolation sheet 12 is connected to the surface of the guide rod 11. The magnetic isolation sheet 12 is located in the second cavity 10, and the end of the guide rod 11 extends into the first cavity 9 to be connected to the spring 6. The magnetic isolation sheet 12 can optimize the electromagnetic force distribution, thereby realizing the precise control of the fluid flow rate.

[0021] A wiring plug 13 electrically connected to the electromagnetic coil 7 is arranged on the surface of the valve body 1.

[0022] The cross-section of the first cavity 9 is in a convex shape structure. An adjusting bolt 14 matching its shape is connected inside the first cavity 9. The spring 6 is connected between the adjusting bolt 14 and the electromagnet core 5. By adjusting the adjusting bolt 14, the compression amount of the initial position of the spring 6 can be adjusted, thereby realizing the adjustment of the opening pressure of the proportional solenoid valve.

[0023] A protective cap 15 is connected to the valve body 1. The protective cap 15 covers the adjusting bolt 14; a sealing ring 16 is arranged at the connection part between the valve body 1 and the protective cap 15, which can prevent dust, moisture and other possible pollutants from entering, thereby ensuring the normal operation of the proportional solenoid valve and extending its service life.

[0024] The inner diameter of the first cavity 9 is smaller than the inner diameter of the second cavity 10, which can better limit the moving space of the spring 6 and the electromagnet core 5 and ensure the control accuracy.

[0025] A valve rod 17 is provided at the connection end of the electromagnet core 5 and the valve seat 2. When the electromagnetic coil 7 is not energized, the valve rod 17 abuts against the valve seat 2, and the hydrogen inlet 3 and the hydrogen outlet 4 are not connected; when the electromagnetic coil 7 is energized, the electromagnetic force drives the electromagnet core 5 to move away from the valve seat 2 against the elastic force of the spring 6, and the valve rod 17 is separated from the valve seat 2. At this time, the proportional solenoid valve is opened, and as the magnitude of the current changes, the moving distance of the electromagnet core 5 is also different, and the flow rate of the proportional solenoid valve is also different, that is, proportional control is achieved.

[0026] The proportional solenoid valve in this application has high adjustment accuracy and high service life, and can meet the requirement of ten million times of opening and closing. At the same time, the initial compression amount of the spring 6 is no longer fixed, and the durable pressure is high, and the opening pressure can be adjusted according to the different pressures of the use environment to meet different use requirements.

[0027] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A proportional solenoid valve for hydrogen, comprising a valve body (1) and a valve seat (2), wherein a hydrogen inlet (3) and a hydrogen outlet (4) are arranged on the surface of the valve seat (2), characterized in that: The valve body (1) is internally connected with an electromagnetic core (5), a spring (6) and an electromagnetic coil (7); the electromagnetic coil (7) is wound around the outer periphery of the electromagnetic core (5); one end of the electromagnetic core (5) is connected to the spring (6), and the other end is connected to the valve seat (2); the electromagnetic coil (7) can drive the electromagnetic core (5) away from the valve seat (2), so that the hydrogen inlet (3) and the hydrogen outlet (4) are connected; and a wear-resistant sheath (8) is connected to the contact portion between the inner wall of the valve body (1) and the electromagnetic core (5).

2. The proportional solenoid valve for hydrogen according to claim 1, characterized in that: The valve body (1) is provided with a first cavity (9) and a second cavity (10) which are distributed vertically. The spring (6) is connected to the first cavity (9), the electromagnet core (5) is connected to the second cavity (10), and the wear-resistant sleeve (8) is connected to the inner wall of the second cavity (10).

3. The proportional solenoid valve for hydrogen according to claim 1, characterized in that: A guide rod (11) is provided at the connection end between the electromagnet core (5) and the spring (6); the spring (6) is sleeved and connected to the guide rod (11); and a magnetic isolation sheet (12) is connected to the surface of the guide rod (11).

4. The proportional solenoid valve for hydrogen according to claim 1, characterized in that: The surface of the valve body (1) is provided with a wiring plug (13) electrically connected to the electromagnetic coil (7).

5. The proportional solenoid valve for hydrogen according to claim 2, characterized in that: The cross section of the first cavity (9) is a convex structure, an adjusting bolt (14) matching its shape is connected inside the first cavity (9), and the spring (6) is connected between the adjusting bolt (14) and the electromagnet core (5).

6. The proportional solenoid valve for hydrogen according to claim 5, characterized in that: The valve body (1) is connected to a protective cap (15), and the protective cap (15) is arranged above the adjusting bolt (14); a sealing ring (16) is provided at the connection between the valve body (1) and the protective cap (15).

7. The proportional solenoid valve for hydrogen according to claim 2, characterized in that: The inner diameter of the first cavity (9) is smaller than the inner diameter of the second cavity (10).

8. The proportional solenoid valve for hydrogen according to claim 1, characterized in that: A valve stem (17) is provided at the connection end between the electromagnetic core (5) and the valve seat (2).

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