Piston type electromagnetic valve

Abstract

The utility model relates to the technical field of electromagnetic valves, and discloses a piston type electromagnetic valve which comprises an electromagnetic valve body, a water inlet pipe and a water outlet pipe are arranged on the side wall of the electromagnetic valve body, a filter box is arranged on the water inlet pipe, a flange plate is arranged on the water inlet pipe on the other side of the filter box, and a pressure relief mechanism is arranged below the water outlet pipe. According to the technical scheme, by arranging the pressure relief mechanism, pressure relief can be conveniently conducted on the pipeline when the pressure in the pipeline is too large, by arranging the backflow prevention mechanism, backflow is prevented, more convenience is achieved, all the structures are matched with one another, time is saved, the structure is simple, operation is convenient, and practicability is high. The efficiency is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of solenoid valves, in particular to a piston type solenoid valve. Background Art

[0002] Solenoid valves are industrial equipment controlled by electromagnetics. They are basic automation components used to control fluids. They are actuators and are not limited to hydraulic or pneumatic. They are used in industrial control systems to adjust the direction, flow, speed and other parameters of the medium. Solenoid valves can be used with different circuits to achieve the desired control, and the accuracy and flexibility of the control can be guaranteed. There are many types of solenoid valves, and different solenoid valves play a role in different positions in the control system. The most commonly used ones are check valves, safety valves, directional control valves, speed regulating valves, etc.

[0003] In the patent document with the published announcement number CN 217130472 U, a compact piston solenoid valve is disclosed, including a valve body, an electromagnetic coil is arranged inside the valve body, a mounting head is fixedly arranged inside the upper end of the valve body, an iron core valve stem is slidably arranged inside the valve body, a piston is fixedly arranged at the lower end of the iron core valve stem, a sealing member is arranged on the lower end surface of the piston, an inner slide groove is arranged inside the piston, an inner sliding sealing block is slidably arranged inside the inner slide groove, and by energizing the upper and lower electromagnets, the upper electromagnet attracts the lower electromagnet, and the lower electromagnet moves upward inside the magnetic isolation groove, thereby driving the sliding sealing block inside the transmission rod to slide upward inside the inner slide groove, thereby balancing the pressure difference at both ends through the through grooves at both ends of the inner slide groove, and at this time, the electromagnetic coil is energized again to drive the iron core valve stem to move and drive the piston to slide inside the piston slide groove to open the valve, and when the power is off, the spring drives the piston to reset, which is more convenient to open and makes the volume smaller.

[0004] The existing device is not provided with a backflow prevention mechanism, and when the pressure in the pipeline is too high, it cannot be relieved, which may cause the device to be damaged due to excessive pressure. Therefore, a piston-type solenoid valve is needed. Utility Model Content

[0005] The purpose of the utility model is to provide a piston type solenoid valve, which solves the problems raised in the background technology.

[0006] An embodiment of the present application provides a piston-type solenoid valve, including a solenoid valve body, a water inlet pipe and a water outlet pipe are arranged on the side wall of the solenoid valve body, a filter box is arranged on the water inlet pipe, a flange is arranged on the water inlet pipe on the other side of the filter box, a pressure relief mechanism is arranged below the water outlet pipe, a backflow prevention mechanism is arranged on the water outlet pipe, and another flange is arranged on the water outlet pipe on the other side of the backflow prevention mechanism.

[0007] In this technical solution, the two flanges are installed at the required positions, and then the iron core is energized. The energization causes the iron core and the armature to be magnetized and become two magnets with the same polarity. Under the action of the magnetic force, the armature is squeezed downward, and at the same time, the blocking block is driven to move downward. The blocking block moves downward, which can block the blocking groove on the spacer block and prevent water leakage and air leakage through the square sealing gasket. At the same time, when the pressure in the pipeline is too high, the blocking plate will be squeezed to move downward, and the gas under the blocking plate will be squeezed into the box through the connecting pipe, and the movable plate will be squeezed upward, and then the circular hole on the pressure relief mechanism will leak out, so that the gas or liquid inside the pipeline will leak out through the circular hole for pressure relief. When the gas or liquid in the pipeline passes through the anti-backflow mechanism, the slide plate inside it is squeezed, and the slide plate moves to the other side, so that the gas or liquid flows through. When it stops passing, the slide plate is reset under the action of the spring group, and then the hole on the anti-backflow mechanism is blocked by the circular blocking block.

[0008] Optionally, the solenoid valve body includes an iron core, a first spring is provided at the lower end of the iron core, an armature is provided at the lower end of the first spring, the armature is slidably installed on the side wall of the solenoid valve body, a blocking block is provided at the lower end of the armature, a spacer is provided inside the solenoid valve body, a through hole is opened on the spacer, and a blocking groove is opened on the spacer above the through hole.

[0009] By adopting the above technical solution, when the iron core is energized, the armature is squeezed downward under the action of magnetic force, and at the same time, the blocking block is driven to move downward. The blocking block moves downward and can block the blocking groove on the spacer.

[0010] Optionally, the pressure relief mechanism includes a blocking plate, a circular hole is opened on the pressure relief mechanism, the blocking plate is L-shaped, a connecting pipe is provided at the lower end of the pressure relief mechanism, a box is provided at the other end of the connecting pipe, a movable plate is slidably installed on the upper wall of the box, a second spring is fixedly installed on the movable plate, and the other end of the second spring is fixedly installed on the side wall of the box.

[0011] By adopting the above technical solution, when the pressure in the pipeline is too high, the blocking plate will be squeezed to move downward, and the gas under the blocking plate will be squeezed into the box through the connecting pipe, and the movable plate will be squeezed upward, and then the circular hole on the pressure relief mechanism will leak out, so that the gas or liquid inside the pipeline will leak out through the circular hole to relieve the pressure.

[0012] Optionally, the anti-backflow mechanism includes a limiting rod, which is fixedly mounted on the inner wall of the anti-backflow mechanism, and a slide is slidably mounted on the limiting rod, a spring group is fixedly mounted on one side of the slide, and the other end of the spring group is fixedly mounted on the inner wall of the anti-backflow mechanism, and a circular blocking block is arranged on the slide.

[0013] By adopting the above technical solution, when the gas or liquid in the pipeline passes through the anti-backflow mechanism, the slide inside it is squeezed, and the slide moves to the other side, so that the gas or liquid stops flowing. When the flow stops, the slide is driven to reset under the action of the spring group, and then the hole on the anti-backflow mechanism is blocked by the circular blocking block.

[0014] Optionally, a coil is wound around the outer surface of the iron core.

[0015] By adopting the above technical solution, the iron core and the armature are magnetized by powering on, and become two magnets with the same polarity.

[0016] Optionally, a circular sealing gasket is provided on the circular blocking block.

[0017] By adopting the above technical solution, the circular sealing gasket is used to seal the circular blocking block to prevent water leakage and air leakage.

[0018] Optionally, two square sealing pads are provided on the side walls of the blocking block.

[0019] By adopting the technical solution, water leakage and air leakage can be prevented.

[0020] Optionally, a sealed environment is provided between the blocking plate in the pressure relief mechanism and the moving plate in the box.

[0021] By adopting the above technical solution, pressure relief is facilitated.

[0022] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0023] The technical solution of the present application provides a pressure relief mechanism to facilitate pressure relief in the pipeline when the pressure is too high, and provides an anti-backflow mechanism to prevent backflow, which is more convenient. The various structures cooperate with each other, saving time and being more efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0025] Figure 1 This is a structural schematic diagram of a piston type solenoid valve of the utility model;

[0026] Figure 2 This is a schematic diagram of the internal structure of a solenoid valve body in a piston-type solenoid valve of the utility model;

[0027] Figure 3 This is a schematic diagram of the internal structure of a pressure relief mechanism in a piston-type solenoid valve of the utility model;

[0028] Figure 4The utility model is a schematic diagram of the internal structure of a backflow prevention mechanism in a piston type solenoid valve.

[0029] In the figure: 1. solenoid valve body; 2. filter box; 3. flange; 4. pressure relief mechanism; 5. backflow prevention mechanism; 6. iron core; 7. first spring; 8. armature; 9. blocking block; 10. square sealing gasket; 11. spacer; 12. blocking plate; 13. connecting pipe; 14. moving plate; 15. second spring; 16. limit rod; 17. spring group; 18. slide plate; 19. round blocking block; 20. round sealing gasket. DETAILED DESCRIPTION

[0030] See also Figure 1-4 The utility model provides a technical solution: a piston solenoid valve, comprising a solenoid valve body 1, a water inlet pipe and a water outlet pipe are arranged on the side wall of the solenoid valve body 1, a filter box 2 is arranged on the water inlet pipe, a flange 3 is arranged on the water inlet pipe on the other side of the filter box 2, a pressure relief mechanism 4 is arranged below the water outlet pipe, a backflow prevention mechanism 5 is arranged on the water outlet pipe, and another flange 3 is arranged on the water outlet pipe on the other side of the backflow prevention mechanism 5.

[0031] In the technical solution of the utility model, if Figure 2 As shown, the solenoid valve body 1 includes an iron core 6, a first spring 7 is provided at the lower end of the iron core 6, an armature 8 is provided at the lower end of the first spring 7, the armature 8 is slidably mounted on the side wall of the solenoid valve body 1, a blocking block 9 is provided at the lower end of the armature 8, a spacer 11 is provided inside the solenoid valve body 1, a through hole is provided on the spacer 11, and a blocking groove is provided on the spacer 11 above the through hole. When the iron core 6 is energized, the armature 8 is squeezed downward under the action of magnetic force, and at the same time, the blocking block 9 is driven to move downward. The blocking block 9 moves downward and can block the blocking groove on the spacer 11.

[0032] In the technical solution of the utility model, if Figure 3 As shown, the pressure relief mechanism 4 includes a blocking plate 12, a circular hole is opened on the pressure relief mechanism 4, the blocking plate 12 is L-shaped, a connecting pipe 13 is provided at the lower end of the pressure relief mechanism 4, a box is provided at the other end of the connecting pipe 13, a movable plate 14 is slidably installed on the inner wall of the box, a second spring 15 is fixedly installed on the movable plate 14, and the other end of the second spring 15 is fixedly installed on the side wall of the box. When the pressure in the pipeline is too large, the blocking plate 12 will be squeezed to move downward, and the gas under the blocking plate 12 will be squeezed into the box through the connecting pipe 13, and the movable plate 14 will be squeezed upward, and then the circular hole on the pressure relief mechanism 4 will leak out, so that the gas or liquid inside the pipeline will leak out through the circular hole to relieve the pressure.

[0033] In the technical solution of the utility model, if Figure 4 As shown, the anti-backflow mechanism 5 includes a limiting rod 16, which is fixedly mounted on the inner wall of the anti-backflow mechanism 5. A slide plate 18 is slidably mounted on the limiting rod 16. A spring group 17 is fixedly mounted on one side of the slide plate 18, and the other end of the spring group 17 is fixedly mounted on the inner wall of the anti-backflow mechanism 5. A circular blocking block 19 is provided on the slide plate 18. When the gas or liquid in the pipeline passes through the anti-backflow mechanism 5, the slide plate 18 inside it is squeezed, and the slide plate 18 moves to the other side, so that the gas or liquid stops flowing. When the gas or liquid stops passing through, the slide plate 18 is reset under the action of the spring group 17, and then the hole on the anti-backflow mechanism 5 is blocked by the circular blocking block 19.

[0034] In the technical solution of the utility model, if Figure 2 As shown, a coil is wound around the outer surface of the iron core 6. When power is supplied, the iron core 6 and the armature 8 are magnetized to become two magnets with the same polarity.

[0035] In the technical solution of the utility model, if Figure 4 As shown, a circular sealing gasket 20 is provided on the circular blocking block 19, and the circular sealing gasket 20 is used to seal the circular blocking block 19 to prevent water leakage and air leakage.

[0036] In the technical solution of the utility model, if Figure 2 As shown, two square sealing pads 10 are arranged on the side wall of the blocking block 9 to prevent water leakage and air leakage.

[0037] In the technical solution of the utility model, if Figure 3 As shown, there is a sealed environment between the blocking plate 12 in the pressure relief mechanism 4 and the moving plate 14 in the box body, which is convenient for pressure relief.

[0038] In this technical solution, the two flanges 3 are installed at the required positions, and then the iron core 6 is energized. The energization causes the iron core 6 and the armature 8 to be magnetized and become two magnets with the same polarity. Under the action of the magnetic force, the armature 8 is squeezed downward, and at the same time, the blocking block 9 is driven to move downward. The blocking block 9 moves downward, which can block the blocking groove on the spacer 11, and prevent water leakage and air leakage through the square sealing gasket 10. At the same time, when the pressure in the pipeline is too large, the blocking plate 12 will be squeezed to move downward, and the gas under the blocking plate 12 will be squeezed into the box through the connecting pipe 13, and the moving plate 14 will be squeezed upward, and then the circular hole on the pressure relief mechanism 4 will leak out, so that the gas or liquid inside the pipeline will leak out through the circular hole for pressure relief. When the gas or liquid in the pipeline passes through the anti-backflow mechanism 5, the slide plate 18 inside it is squeezed, and the slide plate 18 moves to the other side, so that the gas or liquid flows through. When it stops passing, the slide plate 18 is driven to reset under the action of the spring group 17, and then the hole on the anti-backflow mechanism 5 is blocked by the circular blocking block 19.

Claims

1. A piston type solenoid valve, characterized in that: The invention comprises a solenoid valve body (1), a water inlet pipe and a water outlet pipe are arranged on the side wall of the solenoid valve body (1), a filter box (2) is arranged on the water inlet pipe, a flange (3) is arranged on the water inlet pipe on the other side of the filter box (2), a pressure relief mechanism (4) is arranged below the water outlet pipe, a backflow prevention mechanism (5) is arranged on the water outlet pipe, and another flange (3) is arranged on the water outlet pipe on the other side of the backflow prevention mechanism (5).

2. A piston type solenoid valve according to claim 1, characterized in that: The solenoid valve body (1) comprises an iron core (6), a first spring (7) is arranged at the lower end of the iron core (6), an armature (8) is arranged at the lower end of the first spring (7), the armature (8) is slidably mounted on the side wall of the solenoid valve body (1), a blocking block (9) is arranged at the lower end of the armature (8), a spacer (11) is arranged inside the solenoid valve body (1), a through hole is opened on the spacer (11), and a blocking groove is opened on the spacer (11) above the through hole.

3. A piston type solenoid valve according to claim 1, characterized in that: The pressure relief mechanism (4) comprises a blocking plate (12), a circular hole is provided on the pressure relief mechanism (4), the blocking plate (12) is L-shaped, a connecting pipe (13) is provided at the lower end of the pressure relief mechanism (4), a box body is provided at the other end of the connecting pipe (13), a moving plate (14) is slidably mounted on the inner wall of the box body, a second spring (15) is fixedly mounted on the moving plate (14), and the other end of the second spring (15) is fixedly mounted on the side wall of the box body.

4. A piston type solenoid valve according to claim 1, characterized in that: The backflow prevention mechanism (5) comprises a limit rod (16), the limit rod (16) being fixedly mounted on the inner wall of the backflow prevention mechanism (5), a slide plate (18) being slidably mounted on the limit rod (16), a spring group (17) being fixedly mounted on one side of the slide plate (18), the other end of the spring group (17) being fixedly mounted on the inner wall of the backflow prevention mechanism (5), and a circular blocking block (19) being arranged on the slide plate (18).

5. A piston type solenoid valve according to claim 2, characterized in that: The outer surface of the iron core (6) is wound with a coil.

6. A piston type solenoid valve according to claim 4, characterized in that: A circular sealing pad (20) is arranged on the circular blocking block (19).

7. A piston type solenoid valve according to claim 2, characterized in that: Two square sealing pads (10) are arranged on the side wall of the blocking block (9).

8. The piston type solenoid valve according to claim 3, characterized in that: A sealed environment is created between the blocking plate (12) in the pressure relief mechanism (4) and the moving plate (14) in the box.

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