Hydraulic electromagnetic valve with long service life

Abstract

The long-life hydraulic electromagnetic valve comprises a movable iron core, a coil frame, an ejector rod, a static iron core, a valve and a valve seat, the movable iron core and the coil frame are arranged in the coil frame, the ejector rod is installed in an inner hole of the static iron core, the valve seat is in threaded connection with the coil frame, the lower end of the valve is inserted into the valve seat, an inner cavity is formed in the lower portion of the static iron core, and the inner cavity is communicated with the inner cavity. The upper end of the valve penetrates into the inner cavity and corresponds to the lower end of the ejector rod, a steel cable baffle ring and a spring seat are arranged in the outer circumferential direction of the upper end of the valve, a spring is arranged between the spring seat and the upper end of the valve seat, an annular groove is formed in the middle of the valve in the circumferential direction, and an inner cavity through hole is formed in the center of the valve. A transverse hole communicated with the inner cavity through hole and the inner cavity is formed in the upper part of the valve; the electromagnetic valve is compact in structural design, the size of the valve body cannot be increased, the capacity of buffering high-pressure oil liquid is achieved, meanwhile, the lubricating effect is good, friction is reduced, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic solenoid valves, in particular to a long-life hydraulic solenoid valve. Background Art

[0002] The solenoid valve is an industrial device controlled by electromagnetics. It is a basic automation component used to control fluids and is an actuator. The solenoid valve controls the movement of the internal moving iron core through the magnetic force of an external coil, thereby pushing the push rod valve and sealing with the valve seat. When power is turned on, the magnetic force generated by the moving iron core moves the valve, opening the oil and allowing it to flow out. When the solenoid valve is powered off, the valve quickly closes and seals under the oil and force.

[0003] High-performance and long-life hydraulic solenoid valves have the advantages of high market recognition and popularity, and have always been the goal pursued by enterprises. However, most valve components are foreign brands, expensive, and their performance is not much better than domestic ones. The main defects of the existing solenoid valves are poor lubrication and high friction, resulting in a short service life, and the impact force of high-pressure oil on the solenoid valve is large, which can easily lead to coil overload and damage to the valve body. Chinese application No. 201921155666.9 discloses a solenoid valve, which also includes a manual control component arranged on the electromagnetic control component, and the manual control component includes a rotary cover arranged on the electromagnetic control component, one end of which is connected to the valve core and the other end of which is connected to the rotary cover, and can drive the valve core to close / open the valve port as the rotary cover rotates; there are the disadvantages of poor lubrication and high friction, resulting in a short service life; so a long-life hydraulic solenoid valve is proposed to address the above problems. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the existing defects and provide a long-life hydraulic solenoid valve. The solenoid valve has a compact structure design, does not increase the size of the valve body, has the ability to buffer high-pressure oil, and has good lubrication effect, reduces friction, and extends service life, which can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a long-life hydraulic solenoid valve, comprising a moving iron core, a coil frame, a push rod, a static iron core, a valve and a valve seat, the moving iron core and the coil frame are arranged inside the coil frame, the inner hole of the static iron core is loaded with the push rod, the valve seat is threadedly connected to the coil frame, the lower end of the valve is inserted into the valve seat, the lower part of the static iron core is provided with an inner cavity, the upper end of the valve passes through the inner cavity and corresponds to the lower end of the push rod, a wire retaining ring and a spring seat are provided in the outer circumferential direction of the upper end of the valve, a spring is provided between the spring seat and the upper end of the valve seat, an annular groove is provided in the circumferential direction of the middle part of the valve, an inner cavity through hole is provided in the center of the valve, and a transverse hole connecting the inner cavity through hole and the inner cavity is provided on the upper part of the valve.

[0006] Furthermore, the moving iron core and the stationary iron core are sequentially installed from the lower end of the coil frame, and the stationary iron core is threadedly connected to the coil frame.

[0007] Furthermore, at least two annular grooves are provided, and the annular grooves are arranged at equal intervals above and below the valve.

[0008] Furthermore, a liquid inlet is provided at the lower end of the valve seat, a liquid outlet is provided in the circumferential direction of the lower part of the valve seat, an annular groove is provided in the circumferential direction of the valve, a liquid storage cavity is formed between the annular groove and the valve seat, and the liquid outlet corresponds to the liquid storage cavity.

[0009] Furthermore, the push rod is configured as a hollow structure, the upper end of the push rod corresponds to the moving iron core, and the inner cavity through hole is connected with the cavity where the moving iron core is located through the push rod.

[0010] Furthermore, a coil is arranged in the outer circumferential direction of the coil frame, an outer shell is arranged on the outer side of the coil, and a locking nut is arranged at the upper end of the coil frame.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. Due to structural reasons, the oil in the annular groove will stay in the valve annular groove to lubricate the cylindrical surface nearby, reducing friction. The integral design makes the structure more compact, the service life longer, and the space saving. The number, width and depth of the annular grooves are adjusted according to the oil volume and pressure to achieve the best performance.

[0013] 2. A new type of valve is designed with an inner cavity through hole, so that the oil has enough buffer space when passing through the solenoid valve, which improves the strength of the valve and increases its ability to mitigate impact, making the solenoid valve smoother. At the same time, it also provides certain protection for the valve, making the solenoid valve safer and longer in service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the utility model without the coil;

[0016] Figure 3 This is a schematic diagram of the utility model without the coil structure.

[0017] In the figure: 1 locking nut, 2 moving iron core, 3 coil frame, 4 push rod, 5 static iron core, 6 wire retaining ring, 7 spring seat, 8 spring, 9 coil, 10 outer shell, 11 valve, 12 valve seat, 13 inner cavity through hole, 14 annular groove, 15 liquid outlet, 16 liquid inlet, 17 transverse hole, 18 inner cavity, 19 annular groove. DETAILED DESCRIPTION

[0018] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0019] See also Figure 1-3 The utility model provides a technical solution: a long-life hydraulic solenoid valve, including a moving iron core 2, a coil frame 3, a push rod 4, a static iron core 5, a valve 11 and a valve seat 12, the moving iron core 2 and the coil frame 3 are arranged inside the coil frame 3, the moving iron core 2 and the static iron core 5 are sequentially installed from the lower end of the coil frame 3, and the static iron core 5 is threadedly connected to the coil frame 3, the inner hole of the static iron core 5 is installed into the push rod 4, the valve seat 12 is threadedly connected to the coil frame 3, the lower end of the valve 11 is inserted into the valve seat 12, the lower part of the static iron core 5 is provided with an inner cavity 18, the setting of the inner cavity 18 provides space for the wire retaining ring 6, the spring seat 7 and the spring 8, so that the structure is more compact and the equipment size is reduced, the upper end of the valve 11 passes through the inner cavity 18 and is aligned with the lower end of the push rod 4 A wire retaining ring 6 and a spring seat 7 are provided on the outer circumferential direction of the upper end of the valve 11, a spring 8 is provided between the spring seat 7 and the upper end of the valve seat 12, and an annular groove 14 is provided on the circumferential direction of the middle part of the valve 11. Due to structural reasons, the oil in the annular groove 14 will stay in the annular groove 14 to lubricate the cylindrical surface nearby, thereby reducing the friction with the valve seat 12 and improving the sensitivity. Furthermore, at least two annular grooves 14 are provided, and the annular grooves 14 are arranged at equal intervals above and below the valve 11. An inner cavity through hole 13 is provided at the center of the valve 11, and a transverse hole 17 connecting the inner cavity through hole 13 and the inner cavity 18 is provided on the upper part of the valve 11. A part of the high-pressure oil flows into the inner cavity 18 through the inner cavity through hole 13 and the transverse hole 17 to relieve pressure.

[0020] A liquid inlet 16 is provided at the lower end of the valve seat 12, a liquid outlet 15 is provided in the circumferential direction of the lower part of the valve seat 12, and an annular groove 19 is provided in the circumferential direction of the valve 11. A liquid storage cavity is formed between the annular groove 19 and the valve seat 12, and the liquid outlet 15 corresponds to the liquid storage cavity. When the high-pressure oil pushes the valve 11 and the valve seat 12 to fit closely, the liquid inlet 16 is blocked, and the solenoid valve is in a closed state.

[0021] The push rod 4 is set to be a hollow structure, the upper end of the push rod 4 corresponds to the moving iron core 2, the inner cavity through hole 13 is connected with the cavity where the moving iron core 2 is located through the push rod 4, and another part of the high-pressure oil enters the cavity where the moving iron core 2 is located through the inner cavity through hole 13 and the push rod 4, which plays a role in buffering the oil. When the pressure balance is achieved, the solenoid valve will not be blocked by the huge oil pressure and cannot be opened when it is energized, causing the coil overload and solenoid valve damage.

[0022] A coil 9 is arranged in the outer circumferential direction of the coil frame 3 , an outer shell 10 is arranged outside the coil 9 , and a locking nut 1 is arranged at the upper end of the coil frame 3 , and the locking nut 1 is used to firmly fix the outer shell 10 .

[0023] The main structural parts of the solenoid valve are made of high-strength alloy steel, and the surface of the parts is chemically treated to form a nano-coating on the surface, making the structural parts more wear-resistant and having a longer service life.

[0024] Working principle: A solenoid valve is installed in the hydraulic system to connect the oil channel with the outlet 15 and inlet 16 of the solenoid valve. The high-pressure oil pushes the valve 11 and the valve seat 12 to fit tightly together and the oil port is blocked. At the same time, a part of the high-pressure oil enters the inner cavity 18 through the inner cavity through hole 13 and the transverse hole 17 of the valve 11 to relieve pressure, and the other part passes through the push rod 4 and enters the cavity where the moving iron core 2 is located to relieve pressure, achieving pressure balance, so that the solenoid valve will not be blocked and unable to open by the huge oil pressure when it is energized, causing the coil to overload and the solenoid valve to be damaged; when the hydraulic system needs oil to pass through, the coil 9 of the solenoid valve is energized. At this time, the coil 9 instantly forms a magnetic field when it is energized, and the moving iron core 2 moves toward the static iron core 5 at the moment constrained by the magnetic field force. The push rod 4 and the valve 11 are subjected to force, and the valve 11 is separated from the valve seat 12. At this time, the high-pressure oil flows out from the outlet 15.

[0025] The basic principles, main features and advantages of the present invention are shown and described above. Without departing from the spirit and scope of the present invention, the present invention may also be subject to various changes and improvements, which are all within the scope of the present invention to be protected.

Claims

1. A long-life hydraulic solenoid valve, comprising a moving iron core (2), a coil frame (3), a push rod (4), a stationary iron core (5), a valve (11) and a valve seat (12), characterized in that: The moving iron core (2) and the coil frame (3) are arranged inside the coil frame (3), the inner hole of the static iron core (5) is inserted into the push rod (4), the valve seat (12) is threadedly connected to the coil frame (3), the lower end of the valve (11) is inserted into the valve seat (12), the lower part of the static iron core (5) is provided with an inner cavity (18), the upper end of the valve (11) passes through the inner cavity (18) and corresponds to the lower end of the push rod (4), the upper end of the valve (11) is provided with a wire retaining ring (6) and a spring seat (7) in the outer circumferential direction, a spring (8) is provided between the spring seat (7) and the upper end of the valve seat (12), the middle part of the valve (11) is provided with an annular groove (14) in the circumferential direction, the center of the valve (11) is provided with an inner cavity through hole (13), and the upper part of the valve (11) is provided with a transverse hole (17) connecting the inner cavity through hole (13) and the inner cavity (18).

2. A long-life hydraulic solenoid valve according to claim 1, characterized in that: The moving iron core (2) and the stationary iron core (5) are sequentially installed from the lower end of the coil frame (3), and the stationary iron core (5) is threadedly connected to the coil frame (3).

3. A long-life hydraulic solenoid valve according to claim 1, characterized in that: At least two annular grooves (14) are provided, and the annular grooves (14) are arranged at equal intervals above and below the valve (11).

4. A long-life hydraulic solenoid valve according to claim 1, characterized in that: A liquid inlet (16) is provided at the lower end of the valve seat (12), a liquid outlet (15) is provided in the circumferential direction of the lower portion of the valve seat (12), and an annular groove (19) is provided in the circumferential direction of the valve (11), a liquid storage cavity is formed between the annular groove (19) and the valve seat (12), and the liquid outlet (15) corresponds to the liquid storage cavity.

5. The long-life hydraulic solenoid valve according to claim 1, characterized in that: The push rod (4) is configured as a hollow structure, the upper end of the push rod (4) corresponds to the moving iron core (2), and the inner cavity through hole (13) is connected to the cavity where the moving iron core (2) is located through the push rod (4).

6. A long-life hydraulic solenoid valve according to claim 1, characterized in that: A coil (9) is arranged in the outer circumferential direction of the coil frame (3), an outer shell (10) is arranged outside the coil (9), and a locking nut (1) is arranged at the upper end of the coil frame (3).

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