Electromagnetic valve with waterproof hammer effect

Abstract

The utility model relates to an electromagnetic valve with a water hammer prevention effect, which belongs to the technical field of spraying pipeline control equipment, is improved aiming at the influence of the water hammer effect generated when the existing electromagnetic valve is closed on a pipeline, and comprises a shell and a movable iron core, the movable iron core is positioned in the shell, an electromagnetic coil is sleeved outside the movable iron core, and the electromagnetic coil is arranged in the shell. According to the on-off state of the electromagnetic coil, the moving of the movable iron core in the shell is controlled, a buffer device for reducing the moving speed of the movable iron core through a magnetic field is further arranged in the shell, and the buffer device is located on the upper portion of the movable iron core. According to the electromagnetic induction principle, the buffering device is designed, and the water hammer effect is reduced through a simple structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of spray pipeline control equipment, and particularly relates to a solenoid valve with a water hammer effect prevention function. Background Art

[0002] In a pipeline control system, solenoid valves are usually used to regulate the direction, flow rate, and velocity of liquids. The solenoid valve can cooperate with different circuits to achieve the expected control and ensure the accuracy and flexibility of the control. Therefore, solenoid valves are widely used. In livestock farms, in order to reduce the heat stress response of livestock in hot summer, a spray system is installed to cool their body surfaces, and solenoid valves are applied in the spray system. Since the solenoid valve will cause a water hammer effect when it is quickly closed, which is related to the incompressibility of water. When the valve is quickly closed, the energy of the water has nowhere to release, resulting in pressure waves, causing the pipeline to bear pressure and generate noise. Summary of the Utility Model

[0003] In order to reduce the influence of the water hammer effect on the pipeline, the utility model provides a solenoid valve with a water hammer effect prevention function, which releases the pressure wave formed by the sudden blockage of the water flow by adding a buffer device inside the solenoid valve.

[0004] The technical solution adopted by the utility model is as follows: A solenoid valve with a water hammer effect prevention function includes: a housing and a moving iron core. The moving iron core is located inside the housing, and an electromagnetic coil is sleeved outside the moving iron core. According to the on-off state of the electromagnetic coil, the movement of the moving iron core inside the housing is controlled. A buffer device for reducing the moving speed of the moving iron core by using a magnetic field is also provided inside the housing, and the buffer device is located above the moving iron core.

[0005] Preferably, the buffer device includes an insulating connector, a magnetic moving rod, and a copper cylinder. The magnetic moving rod is connected to the upper end face of the moving iron core through the insulating connector. The copper cylinder is fixed on the inner wall of the housing and sleeved outside the magnetic moving rod. When the moving iron core drives the magnetic moving rod to move inside the copper cylinder, the magnetic moving rod is always located outside the electromagnetic coil.

[0006] Preferably, the copper cylinder and the magnetic moving rod are in clearance fit.

[0007] Preferably, the copper cylinder is a cylinder with an opening at the bottom, and its top is fixedly connected to the housing through bolts.

[0008] Preferably, the connection between the moving iron core and the insulating connector, and the connection between the insulating connector and the magnetic moving rod are both in threaded connection.

[0009] The beneficial effects of the utility model are:

[0010] 1. The utility model reduces the impact of the water hammer effect generated by the closing of the solenoid valve on the pipeline by adding a buffer device.

[0011] 2. According to the principle of electromagnetic induction, the buffer device ingeniously designed by the utility model can utilize the mutual cooperation between the magnetic moving rod and the copper cylinder to achieve the same buffer effect with a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural diagram of the utility model;

[0013] Wherein: 1 housing, 2 moving iron core, 3 valve core, 4 valve seat, 5 buffer device, 51 insulating connector, 52 magnetic moving rod, 53 copper cylinder. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The existing solenoid valve includes a housing 1, a moving iron core 2, a valve core 3 and a valve seat 4. One end of the valve core 3 is installed in the valve seat 4, and a spring is sleeved on the outer periphery of the valve core 3; the other end of the valve core 3 is fixedly connected to the moving iron core 2, the housing 1 is sleeved outside the moving iron core 2, and an electromagnetic coil is also sleeved between the housing 1 and the moving iron core 2. When energized, the electromagnetic force generated by the electromagnetic coil lifts the valve core 3 from the valve seat 4, and the valve opens; when de-energized, the electromagnetic force disappears, and under the action of the spring, the valve core 3 is pressed on the valve seat 4, and the valve closes.

[0015] As Figure 1 shown, the utility model is a technical improvement on the existing solenoid valve, and the impact of the water hammer effect generated by the closing of the solenoid valve on the pipeline is reduced by adding a buffer device.

[0016] The buffer device 3 is installed in the housing 1 and at the other end opposite to the moving iron core 2 and the valve core 3. It includes an insulating connector 51, a magnetic moving rod 52 and a copper cylinder 53. The insulating connector 51 is fixedly connected to the end of the moving iron core 2 and is made of insulating material, preferably fiberglass. One end of the magnetic moving rod 52 is connected to the end of the moving iron core 2 through the insulating connector 51, and the magnetic moving rod 52 is preferably made of a magnet. The connection method between the moving iron core 2 and the insulating connector 51 and the connection method between the insulating connector 51 and the magnetic moving rod 52 can be selected but are not limited to threaded connection. The copper cylinder 53 is a cylinder with an opening at the bottom, which is sleeved outside the magnetic moving rod 52 and has a clearance fit with the magnetic moving rod 52, and the magnetic moving rod 52, the copper cylinder 53 and the moving iron core 2 are coaxially arranged. The top of the copper cylinder 53 is fixedly connected to the housing 1 through bolts. By setting the insulating connector 51, the energized electromagnetic coil will not interfere with the magnetic moving rod 52, and when the moving iron core 2 drives the magnetic moving rod 52 to move up and down in the copper cylinder 53, the magnetic moving rod 52 is always located outside the electromagnetic coil.

[0017] Working principle: When the magnetic moving rod 52 moves linearly up and down within the copper cylinder 53, for each cross-section of the copper cylinder 53, the magnetic flux is constantly changing. According to the principle of electromagnetic induction, an induced current is generated within the copper cylinder 53 at this time, and the magnetic field generated by the induced current must prevent the magnetic flux from changing. It is manifested as repelling the magnetic field of the magnetic moving rod 52, hindering the movement of the magnetic moving rod 52, so its moving speed becomes slower, thereby also slowing down the moving speed of the valve core 2.

[0018] Working process:

[0019] When powered on, the electromagnetic force generated by the electromagnetic coil causes the moving iron core 2 to drive the valve core 3 to move upward. Under the action of the buffer device 3, compared with the existing solenoid valve, the valve core 3 is lifted from the valve seat 4 at a slower speed, and the valve opens; when powered off, the electromagnetic force disappears, and under the action of the spring, the moving iron core 2 drives the valve core 3 to move downward. Under the action of the buffer device 3, the valve core 3 is slowly pressed onto the valve seat 4, and the valve closes.

[0020] As described above, only the preferred specific embodiments of the present invention are provided. These specific embodiments are different implementation manners based on the overall concept of the present invention, and the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A solenoid valve with anti-water hammer effect, comprising: A housing (1) and a moving iron core (2), wherein the moving iron core (2) is located in the housing (1), and an electromagnetic coil is also provided outside the moving iron core (2), and the movement of the moving iron core (2) in the housing (1) is controlled according to the on / off state of the electromagnetic coil. The housing (1) is characterized in that a buffer device (5) is also provided in the housing (1) for reducing the moving speed of the moving iron core (2) by using a magnetic field, and the buffer device (5) is located on the upper part of the moving iron core (2).

2. A solenoid valve with water hammer resistance as claimed in claim 1, characterized in that: The buffer device (5) comprises an insulating connector (51), a magnetic movable rod (52) and a copper cylinder (53); the magnetic movable rod (52) is connected to the upper end surface of the moving iron core (2) via the insulating connector (51); the copper cylinder (53) is fixed to the inner wall of the housing (1) and sleeved on the outside of the magnetic movable rod (52); when the moving iron core (2) drives the magnetic movable rod (52) to move in the copper cylinder (53), the magnetic movable rod (52) is always located outside the electromagnetic coil.

3. A solenoid valve with water hammer resistance as claimed in claim 2, characterized in that: The copper cylinder (53) and the magnetic movable rod (52) are clearance-fitted.

4. A solenoid valve with water hammer resistance as claimed in claim 2, characterized in that: The copper cylinder (53) is a cylinder with an opening at the bottom, and its top is fixedly connected to the housing (1) by bolts.

5. The solenoid valve with water hammer resistance as claimed in claim 2, characterized in that: The connection between the moving iron core (2) and the insulating connector (51), and between the insulating connector (51) and the magnetic movable rod (52) are both threaded connections.

Images