Large-opening electromagnetic valve

Abstract

The utility model relates to an electromagnetic valve with a large opening, which is a normally closed electromagnetic valve and comprises moving iron and a moving iron rod. The electromagnetic valve further comprises a valve sleeve and a spring, the valve sleeve is arranged below the movable iron, the upper end of the valve sleeve is fixedly connected with the movable iron, the movable iron rod is arranged in the valve sleeve and is in clearance fit with the valve sleeve, the lower end of the movable iron rod extends out of the valve sleeve by a section, the spring is installed in the valve sleeve and acts on the movable iron rod, and the movable iron rod is driven by the spring to rotate. The upper end face of the movable iron rod makes contact with the lower end face of the movable iron, an upper step is arranged outside the movable iron rod, a lower step is arranged in the valve sleeve, the upper step is located above the lower step, the upper step and the lower step are opposite, and a gap is formed between the upper step and the lower step. The connection between the moving iron rod and the moving iron is improved, when the electromagnetic force is small, the moving iron rises, the moving iron rod does not move, and after the electromagnetic force is large to a certain moving degree, the moving iron rod is driven to rise together, and the electromagnetic valve is opened; and after the electromagnetic valve is opened, the movable iron rod is reset under the action of the spring.

Description

Technical Field

[0001] The utility model relates to a solenoid valve, in particular to a large-opening solenoid valve. Background Art

[0002] For a traditional large-opening electromagnetic (normally closed solenoid valve), the electromagnetic force exerted on the moving iron by the magnetic circuit formed is increased as the distance between the moving iron and the fixed iron becomes smaller. Initially, the distance between the moving iron and the fixed iron is large, and the electromagnetic force exerted on the moving iron is small. For a large-opening solenoid valve (with large resistance), it is difficult to drive the moving iron assembly to move upward to open the solenoid valve.

[0003] If only the distance between the moving iron and the fixed iron is adjusted, although a larger electromagnetic force can be obtained initially, this undoubtedly shortens the stroke of the moving iron assembly. Summary of the Utility Model

[0004] To solve the above problems, the utility model provides a large-opening solenoid valve, which improves the connection between the moving iron rod and the moving iron. When the electromagnetic force is small, the moving iron rises while the moving iron rod remains stationary. When the electromagnetic force reaches a certain level, the moving iron rod is driven to rise together to open the solenoid valve. After the solenoid valve is opened, the moving iron rod is reset under the action of the spring.

[0005] The technical solution of the utility model is as follows:

[0006] A large-opening solenoid valve, the solenoid valve is a normally closed solenoid valve, which includes a moving iron and a moving iron rod; the solenoid valve further includes a valve sleeve and a spring. The valve sleeve is arranged below the moving iron, and its upper end is fixedly connected to the moving iron. The moving iron rod is arranged in the valve sleeve and is in clearance fit with the valve sleeve. Its lower end extends out of the valve sleeve for a certain length. The spring is installed in the valve sleeve and acts on the moving iron rod. Under the action of the spring, the upper end surface of the moving iron rod contacts the lower end surface of the moving iron.

[0007] When the coil is energized, a magnetic circuit is formed to exert an electromagnetic force on the moving iron. Under the action of the electromagnetic force, the moving iron rises, and the valve sleeve rises together. At this time, the resistance overcomes the acting force exerted by the spring on the moving iron rod, keeping the moving iron rod stationary. After the spring is compressed to the minimum, at this time, the electromagnetic force is large enough, and the moving iron rod is driven to rise together by the spring transmission to open the solenoid valve. After the solenoid valve is opened, the resistance disappears, and the acting force exerted by the spring on the moving iron rod causes the moving iron rod to rise and reset.

[0008] For further optimization of the above structure, an upper step is arranged outside the moving iron rod, and a lower step is arranged in the valve sleeve. The upper step is located above the lower step, and there is a distance between them.

[0009] When the coil is energized, a magnetic circuit is formed to apply an electromagnetic force to the moving iron. Under the action of the electromagnetic force, the moving iron rises, and the valve sleeve rises together with it. At this time, the resistance overcomes the force exerted by the spring on the moving iron rod, keeping the moving iron rod stationary. The lower step rises and approaches the upper step until the lower step contacts the upper step. At this time, the electromagnetic force is already large enough. By using the interlocking of the upper step and the lower step, the moving iron rod is driven to rise together, opening the solenoid valve. After the solenoid valve is opened, the resistance disappears, and the force exerted by the spring on the moving iron rod causes the moving iron rod to rise and reset.

[0010] A guide groove or hole is provided on the lower end face of the moving iron, and a guide post is provided on the upper end face of the moving iron rod. The guide post extends into the guide groove or hole and is slidably connected with the guide groove or hole.

[0011] The spring is sleeved on the outer periphery of the moving iron rod, with its lower end abutted against the reduced diameter of the lower end of the valve sleeve and its upper end abutted against the upper step.

[0012] The upper step is located at the upper end of the moving iron rod. Description of the Drawings

[0013] Figure 1 It is a schematic structural diagram (section) of the large-opening solenoid valve in Embodiment 1.

[0014] Figure 2 It is a schematic structural diagram (section) of the large-opening solenoid valve in Embodiment 2.

[0015] Figure 3 It is a schematic structural diagram (section) of the large-opening solenoid valve in Embodiment 3.

[0016] In the figure

[0017] In the solenoid valve of Embodiment 1: stationary iron 1-1, magnetic isolation tube 1-2, noise reduction ring 1-3, spring I 1-4, moving iron 1-5, guide hole 1-5-1, flange 1-6, spring II 1-7, valve sleeve 1-8, lower step 1-8-1, moving iron rod 1-9, upper step 1-9-1, guide post 1-9-2, seal 1-10, valve seat 1-11;

[0018] In the solenoid valve of Embodiment 2: stationary iron 2-1, magnetic isolation tube 2-2, noise reduction ring 2-3, spring I 2-4, moving iron 2-5, guide hole 2-5-1, valve body 2-6, spring II 2-7, valve sleeve 2-8, lower step 2-8-1, moving iron rod 2-9, upper step 2-9-1, guide post 2-9-2, seal 2-10, support seat 2-11, valve seat 2-12.

[0019] In Embodiment 3 of the solenoid valve: the stationary iron 3-1, the magnetic isolation tube 3-2, the noise reduction ring 3-3, the spring I 3-4, the moving iron 3-5, the guide hole 3-5-1, the valve body 3-6, the support seat 3-7, the spring II 3-8, the valve sleeve 3-9, the moving iron rod 3-10, the upper step 3-10-1, the guide post 3-10-2, the seal 3-11, the valve seat 3-12, the protective sleeve 3-13. Detailed implementation mode Embodiment

[0020] As Figure 1 As shown, a large-opening solenoid valve, the solenoid valve is a normally-closed solenoid valve, which is connected and formed by a stationary iron 1-1, a magnetic isolation tube 1-2, a noise reduction ring 1-3, a spring I 1-4, a moving iron 1-5, a flange 1-6, a spring II 1-7, a valve sleeve 1-8, a moving iron rod 1-9, a seal 1-10, and a valve seat 1-11;

[0021] Among them, the valve sleeve 1-8 is arranged below the moving iron 1-5, and its upper end is fixedly connected with the moving iron 1-5 (interference fit connection). The moving iron rod 1-9 is arranged in the valve sleeve 1-8 and is in clearance fit with the valve sleeve 1-8. Its lower end extends out of the valve sleeve 1-8 for a section. An upper step 1-9-1 is arranged outside the upper end of the moving iron rod 1-9. A lower step 1-8-1 is arranged in the valve sleeve 1-8. The upper step 1-9-1 is located above the lower step 1-8-1, and there is a distance between them. The spring II 1-7 is arranged in the valve sleeve 1-8. It sleevs on the outer periphery of the moving iron rod 1-9, its lower end abuts against the lower end necking of the valve sleeve 1-8, and its upper end abuts against the upper step 1-9-1. Under the action of the spring II 1-7, the upper end face of the moving iron rod 1-9 contacts the lower end face of the moving iron 1-5. A guide hole 1-5-1 is arranged on the lower end face of the moving iron 1-5. A guide post 1-9-2 is arranged on the upper end face of the moving iron rod 9. The guide post 1-9-2 extends into the guide hole 1-5-1 and is in sliding fit connection with the guide hole 1-5-1. Embodiment

[0022] As Figure 2 As shown, a large-opening solenoid valve, the solenoid valve is a normally-closed solenoid valve, which is connected and formed by a stationary iron 2-1, a magnetic isolation tube 2-2, a noise reduction ring 2-3, a spring I 2-4, a moving iron 2-5, a valve body 2-6, a spring II 2-7, a valve sleeve 2-8, a moving iron rod 2-9, a seal 2-10, a support seat 2-11, and a valve seat 2-12;

[0023] Among them, the valve sleeve 2-8 is arranged below the moving iron 2-5, and its upper end is fixedly connected to the moving iron 2-5 (interference fit connection). The moving iron rod 2-9 is arranged in the valve sleeve 2-8 and is in clearance fit with the valve sleeve 2-8. Its lower end extends out of the valve sleeve 2-8 for a certain length. An upper step 2-9-1 is arranged outside the upper end of the moving iron rod 2-9. A lower step 2-8-1 is arranged in the valve sleeve 2-8. The upper step 2-9-1 is located above the lower step 2-8-1, and there is a spacing between them. The spring II 2-7 is arranged in the valve sleeve 2-8. It sleevs the outer circumference of the moving iron rod 2-9, its lower end abuts against the reduced diameter at the lower end of the valve sleeve 2-8, and its upper end abuts against the upper step 2-9-1. Under the action of the spring II 2-7, the upper end face of the moving iron rod 2-9 contacts the lower end face of the moving iron 2-5. A guiding hole 2-5-1 is arranged on the lower end face of the moving iron 2-5. A guiding column 2-9-2 is arranged on the upper end face of the moving iron rod 9. The guiding column 2-9-2 extends into the guiding hole 2-5-1 and is in sliding fit connection with the guiding hole 2-5-1. Embodiment

[0024] As Figure 3 As shown, a large-opening solenoid valve, the solenoid valve is a normally closed solenoid valve, which is composed of a fixed iron 3-1, a magnetic isolation tube 3-2, a noise reduction ring 3-3, a spring I 3-4, a moving iron 3-5, a valve body 3-6, a support seat 3-7, a spring II 3-8, a valve sleeve 3-9, a moving iron rod 3-10, a seal 3-11, a valve seat 3-12, and a protective sleeve 3-13 connected together;

[0025] Among them, the valve sleeve 3-9 is arranged below the moving iron 3-5, and its upper end is fixedly connected to the moving iron 3-5 (interference fit connection). The moving iron rod 3-9 is arranged in the valve sleeve 3-9 and is in clearance fit with the valve sleeve 3-9. Its lower end extends out of the valve sleeve 3-9 for a certain length. An upper step 3-10-1 is arranged outside the upper end of the moving iron rod 3-10. The spring II 3-8 is arranged in the valve sleeve 3-9. It sleevs the outer circumference of the moving iron rod 3-10, its lower end abuts against the reduced diameter at the lower end of the valve sleeve 3-9, and its upper end abuts against the upper step 3-10-1. Under the action of the spring II 3-8, the upper end face of the moving iron rod 3-10 contacts the lower end face of the moving iron 3-5. A guiding hole 3-5-1 is arranged on the lower end face of the moving iron 3-5. A guiding column 3-10-2 is arranged on the upper end face of the moving iron rod 3-10. The guiding column 3-10-2 extends into the guiding hole 3-5-1 and is in sliding fit connection with the guiding hole 3-5-1.

[0026] The above is only the preferred specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A large-opening solenoid valve, the solenoid valve being a normally-closed solenoid valve, which comprises an armature and an armature rod; characterized in that, The solenoid valve further includes a valve sleeve and a spring. The valve sleeve is disposed below the armature, and its upper end is fixedly connected to the armature. The armature rod is disposed within the valve sleeve and is in clearance fit with the valve sleeve. A section of its lower end extends out of the valve sleeve. The spring is installed within the valve sleeve and acts on the armature rod. Under the action of the spring, the upper end surface of the armature rod contacts the lower end surface of the armature.

2. The large-opening solenoid valve according to claim 1, characterized in that, An upper step is provided outside the armature rod, and a lower step is provided within the valve sleeve. The upper step is located above the lower step, and they are opposite to each other with a spacing therebetween.

3. The large-opening solenoid valve according to claim 1, characterized in that, A guide groove or hole is provided on the lower end surface of the armature, and a guide post is provided on the upper end surface of the armature rod. The guide post extends into the guide groove or hole and is in sliding fit connection with the guide groove or hole.

4. A large-opening solenoid valve according to claim 1, characterized in that, The spring is sleeved on the outer periphery of the armature rod, with its lower end abutting against the reduced diameter at the lower end of the valve sleeve and its upper end abutting against the upper step.

5. A large-opening solenoid valve according to claim 2, characterized in that, The upper step is located at the upper end of the armature rod.

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