High pressure solenoid valve

Abstract

The utility model discloses a high pressure solenoid valve, including valve body and set up in the pilot head subassembly of valve body, valve body and pilot head subassembly cooperation form have valve cavity, valve body is equipped with input, output and valve mouth respectively, and valve cavity includes first part and second part, and input communicates with first part directly, and output communicates with first part through valve mouth, and first part communicates with second part through fluid channel, be equipped with piston in valve cavity, and piston can move along first direction relative to valve body, along first direction, and piston has opposite first end and second end, and first end is located first part, and second end is located second part, and first end and valve mouth sealing cooperation, and piston has the piston channel cooperation with valve mouth, and piston channel penetrates first end and second end, pilot head subassembly includes dynamic iron core, and dynamic iron core is located second part, and dynamic iron core and piston channel sealing cooperation, can effectively reduce the pressure difference at valve mouth, to adapt high pressure working condition.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic valve technology, and in particular to a high-pressure electromagnetic valve. Background Technology

[0002] The existing direct-acting two-position two-way solenoid valve includes a valve body and a pilot assembly. The valve body has an inlet and an outlet, and the valve body has a valve port for connecting the inlet and outlet. The pilot assembly includes a stationary iron core, a moving iron core, an iron core spring, and a coil assembly. The stationary and moving iron cores are both located within the coil assembly. The moving iron core has a sealing element that seals with the valve port. The iron core spring abuts against the moving iron core. Under normal conditions, when the coil assembly is de-energized, the iron core spring acts on the moving iron core, causing the sealing element to always have a tendency to seal the valve port. When the coil assembly is energized, the moving iron core, under the action of electromagnetic attraction, overcomes the elastic force of the iron core spring and moves towards the stationary iron core, causing the sealing element to separate from the valve port, opening the valve port, and connecting the inlet and outlet. However, existing direct-acting solenoid valves are insufficient for high-pressure or high-flow-rate applications. Specifically, when the valve is closed, the inlet experiences high fluid pressure while the outlet is at low pressure, resulting in a significant pressure difference. The moving iron core must overcome this pressure difference to open the valve, causing difficulty in opening and even preventing the moving iron core from operating. Current technology often requires high-power electromagnetic coil assemblies to drive the moving iron core to overcome the pressure difference, leading to high energy consumption, high operating costs, and heat generation. Therefore, improvements are necessary. Utility Model Content

[0003] The purpose of this utility model is to address the defects and shortcomings of the existing technology by providing a high-pressure solenoid valve with a simple and reasonable structure, convenient operation, and suitability for high-pressure conditions. When energized, the moving iron core moves, and the fluid medium in the second part enters the valve port through the piston channel, which can effectively reduce the pressure difference at the valve port. After the second part is depressurized, the piston moves towards the moving iron core under the action of the fluid medium, and the piston moves away from the valve port, thus opening the valve port.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: The present invention discloses a high-pressure solenoid valve, comprising a valve body and a pilot head assembly disposed on the valve body. The valve body and the pilot head assembly cooperate to form a valve cavity. The valve body is respectively provided with an input port, an output port and a valve port. The valve cavity includes a first part and a second part. The input port is directly connected to the first part, the output port is connected to the first part through the valve port, and the first part is connected to the second part through a fluid channel. A piston is provided in the valve chamber. The piston can move relative to the valve body along a first direction. Along the first direction, the piston has a first end and a second end opposite to each other. The first end is located in the first part, and the second end is located in the second part. The first end is sealed with the valve port. The piston has a piston channel that corresponds to the valve port and passes through the first end and the second end. The pilot head assembly includes a moving iron core, which is located in the second part and is sealed to the piston channel.

[0005] Furthermore, a gap is formed between the outer peripheral wall of the piston and the peripheral side wall of the valve chamber, and the gap forms the fluid channel.

[0006] Furthermore, the first end is provided with a first sealing element that seals with the valve port.

[0007] Furthermore, the second end protrudes to form a protrusion that mates with the piston channel, the protrusion being arranged around the outer periphery of the piston channel.

[0008] Furthermore, the moving iron core is provided with a second sealing element that abuts against the protrusion, and the moving iron core is sealed to the piston channel through the second sealing element.

[0009] Furthermore, the pilot head assembly also includes a magnetic shielding tube, a stationary iron core, a coil assembly, and an iron core spring. The magnetic shielding tube is connected to the valve body to form the valve cavity. The coil assembly is sleeved on the outside of the magnetic shielding tube. The stationary iron core is fixedly installed inside the magnetic shielding tube. The moving iron core is movably installed inside the magnetic shielding tube and cooperates with the stationary iron core. The iron core spring is located between the stationary iron core and the moving iron core. The iron core spring acts on the moving iron core, so that the second sealing element always has the tendency to seal the piston channel.

[0010] Furthermore, a sealing ring is provided between the magnetic shielding tube and the valve body.

[0011] Furthermore, the axis of the piston channel is coaxial with the central axis of the valve port.

[0012] Furthermore, an input channel for fluid medium to pass through is formed between the input port and the first part, and an output channel for fluid medium to pass through is formed between the valve port and the output port.

[0013] The beneficial effects of this utility model are as follows: The high-pressure solenoid valve described in this utility model can meet the requirements under high-pressure conditions. After the fluid medium in the inlet enters the first part, a portion of the fluid medium enters the second part through the gap between the valve chamber and the piston, i.e., the fluid channel. Under normal conditions, i.e., when the coil assembly is de-energized, the iron core spring acts on the moving iron core, causing the second sealing element to always have a tendency to seal the piston channel. The moving iron core acts on the piston, causing the first sealing element to always have a tendency to seal the valve port. The valve port is closed to block the fluid medium from entering the output port. At this time, the pressure difference at the valve port is relatively small. The large size ensures that the piston can tightly and securely seal the valve port, ensuring a stable and reliable seal. When the coil assembly is energized, the moving iron core, under the action of electromagnetic attraction, overcomes the elastic force of the iron core spring and is attracted towards the stationary iron core, causing the second sealing element to move away from the piston channel. The piston channel opens, and the fluid medium in the second part enters the output port through the piston channel and the valve port, which can effectively reduce the pressure difference at the valve port. After the second part is depressurized, the piston moves towards the moving iron core under the action of the fluid medium, causing the first sealing element to move away from the valve port. The valve port opens, and the fluid medium at the input port enters the output port through the valve port. Attached Figure Description

[0014] Figure 1 This is a cross-sectional structural diagram of the present invention; Figure 2 yes Figure 1 A magnified structural diagram of point A in the middle.

[0015] Figures 1-2 In the middle section: 1. Valve body; 11. Inlet; 12. Outlet; 13. Valve port; 14. First part; 15. Second part; 16. Inlet channel; 17. Outlet channel; 171. Starting section; 172. Transition section; 2. Piston; 21. Protrusion; 22. First seal; 23. Piston channel; 31. Magnetic shielding tube; 311. Sealing ring; 32. Stationary iron core; 33. Moving iron core; 331. Second seal; 34. Coil assembly; 35. Iron core spring. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] like Figures 1-2The high-pressure solenoid valve shown includes a valve body 1 and a pilot head assembly disposed on the valve body 1. The valve body 1 and the pilot head assembly cooperate to form a valve cavity. The valve body 1 is respectively provided with an inlet 11, an outlet 12, and a valve port 13. The valve cavity includes a first part 14 and a second part 15. The first part 14 is connected to the second part 15 through a fluid channel. An input channel 16 for fluid medium to pass through is formed between the inlet 11 and the first part 14. The inlet 11 and the first part 14 are directly connected through the input channel 16. An output channel 17 for fluid medium to pass through is formed between the valve port 13 and the outlet 12. The first part 14 is connected to the outlet 13 and the output channel 17. The piston channel 23 is connected to the output port 12. Preferably, in this embodiment, the axis of the piston channel 23 is coaxial with the central axis of the valve port 13 to facilitate the smooth passage of the fluid medium. The output channel 17 includes a starting section 171 and a transition section 172. The starting section 171 and the transition section 172 are arranged in an "L" shape. The starting section 171 extends along the axis of the piston channel 23 to facilitate the smooth entry of the fluid medium into the starting section 171. In this embodiment, a gap is formed between the outer peripheral wall of the piston 2 and the peripheral side wall of the valve cavity. The gap forms the fluid channel. Of course, in other embodiments, a small hole channel can also be opened in the piston 2 or the magnetic shielding tube 31. The small hole channel is the fluid channel.

[0018] A piston 2 is provided inside the valve cavity, which divides the valve cavity into a first part 14 and a second part 15. The piston 2 can move relative to the valve body 1 along a first direction, which is the axial direction of the piston 2 and the direction of movement of the moving iron core 33. Along the first direction, the piston 2 has a first end and a second end facing away from each other. The first end is located in the first part 14, and the second end is located in the second part 15. The first end is sealed with the valve port 13. Preferably, in this embodiment, the first end is provided with a first sealing element 22 that is sealed with the valve port 13, and the piston 2 is sealed with the valve port 13 through the first sealing element 22.

[0019] The piston 2 has a piston channel 23 that corresponds to and cooperates with the valve port 13, and the piston channel 23 passes through the first end and the second end; The pilot head assembly includes a magnetic shielding tube 31, a stationary iron core 32, a moving iron core 33, a coil assembly 34, and an iron core spring 35. The magnetic shielding tube 31 is connected to the valve body 1 to form the valve cavity. The coil assembly 34 is sleeved on the outside of the magnetic shielding tube 31. The stationary iron core 32 is fixedly installed inside the magnetic shielding tube 31. The moving iron core 33 is movably installed inside the magnetic shielding tube 31 and cooperates with the stationary iron core 32. The iron core spring 35 is located between the stationary iron core 32 and the moving iron core 33. A spring mounting groove is provided inside the moving iron core 33. The iron core spring 35 is located in the spring mounting groove and can effectively support the iron core spring 35. The moving iron core 33 is located in the second part 15. The moving iron core 33 is provided with a second sealing element 331. The iron core spring 35 acts on the moving iron core 33, so that the second sealing element 331 always has the tendency to seal the piston channel 23.

[0020] Preferably, in this embodiment, the second end protrudes to form a protrusion 21 that cooperates with the piston channel 23. The protrusion 21 is arranged around the outer periphery of the piston channel 23. The second sealing member 331 abuts against the protrusion 21. The moving iron core 33 is sealed to the piston channel 23 through the second sealing member 331. The high-pressure solenoid valve of this utility model is set as a normally closed valve. Under normal conditions, that is, when the coil assembly 34 is de-energized, the iron core spring 35 acts on the moving iron core 33, so that the second sealing member 331 always has the tendency to seal the piston channel 23. And the moving iron core 33 acts on the piston 2, so that the first sealing member 22 always has the tendency to seal the valve port 13.

[0021] Preferably, in this embodiment, a sealing ring 311 is provided between the magnetic shielding tube 31 and the valve body 1 to ensure the sealing performance between the magnetic shielding tube 31 and the valve body 1 and prevent fluid medium leakage.

[0022] The high-pressure solenoid valve described in this utility model can meet the needs of high-pressure or high-flow conditions. Its working principle is as follows: After the fluid medium in the inlet 11 enters the first part 14, a portion of the fluid medium enters the second part 15 through the gap between the valve chamber and the piston 2, i.e., the fluid channel. Under normal conditions, i.e., when the coil assembly 34 is de-energized, the iron core spring 35 acts on the moving iron core 33, so that the second sealing element 331 always has the tendency to seal the piston channel 23, and the moving iron core 33 acts on the piston 2, so that the first sealing element 22 always has the tendency to seal the valve port 13. The valve port 13 is closed to block the fluid medium from entering the outlet 12. At this time, the pressure difference at the valve port 13 is large, ensuring that the piston 2 can seal tightly and stably. The valve port 13 is sealed to ensure a stable and reliable seal. When the coil assembly 34 is energized, the moving iron core 33, under the action of electromagnetic attraction, overcomes the elastic force of the iron core spring 35 and is attracted towards the stationary iron core 32, so that the second sealing element 331 moves away from the piston channel 23, the piston channel 23 opens, and the fluid medium in the second part 15 enters the output port 12 through the piston channel 23 and the valve port 13, which can effectively reduce the pressure difference at the valve port 13. After the second part 15 is depressurized, the piston 2 moves towards the moving iron core 33 under the action of the fluid medium, so that the first sealing element 22 moves away from the valve port 13, the valve port 13 opens, and the fluid medium in the input port 11 enters the output port 12 through the valve port 13. At this time, the valve port 13 is not affected by the pressure difference.

[0023] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A high-pressure solenoid valve, comprising a valve body (1) and a pilot head assembly disposed on the valve body (1), wherein the valve body (1) and the pilot head assembly cooperate to form a valve cavity, and the valve body (1) is respectively provided with an inlet (11), an outlet (12) and a valve port (13), characterized in that, The valve chamber includes a first part (14) and a second part (15). The inlet (11) is directly connected to the first part (14), and the outlet (12) is connected to the first part (14) through the valve port (13). The first part (14) is connected to the second part (15) through a fluid channel. A piston (2) is provided in the valve cavity. The piston (2) can move relative to the valve body (1) in a first direction. In the first direction, the piston (2) has a first end and a second end opposite to each other. The first end is located in the first part (14), and the second end is located in the second part (15). The first end is sealed to the valve port (13). The piston (2) has a piston channel (23) that corresponds to the valve port (13). The piston channel (23) passes through the first end and the second end. The pilot head assembly includes a moving iron core (33), which is located in the second part (15) and is sealed to the piston channel (23).

2. The high-pressure solenoid valve according to claim 1, characterized in that: A gap is formed between the outer peripheral wall of the piston (2) and the peripheral side wall of the valve chamber, and the gap forms the fluid channel.

3. A high-pressure solenoid valve according to claim 1, characterized in that: The first end is provided with a first sealing element (22) that seals with the valve port (13).

4. A high-pressure solenoid valve according to claim 1, characterized in that: The second end protrudes to form a protrusion (21) that mates with the piston channel (23), and the protrusion (21) is arranged around the outer periphery of the piston channel (23).

5. A high-pressure solenoid valve according to claim 4, characterized in that: The moving iron core (33) is provided with a second sealing element (331) that abuts against the protrusion (21), and the moving iron core (33) is sealed to the piston channel (23) through the second sealing element (331).

6. A high-pressure solenoid valve according to claim 5, characterized in that: The pilot head assembly also includes a magnetic shielding tube (31), a stationary iron core (32), a coil assembly (34), and an iron core spring (35). The magnetic shielding tube (31) is connected to the valve body (1) to form the valve cavity. The coil assembly (34) is sleeved on the outside of the magnetic shielding tube (31). The stationary iron core (32) is fixedly installed inside the magnetic shielding tube (31). The moving iron core (33) is movably installed inside the magnetic shielding tube (31) and cooperates with the stationary iron core (32). The iron core spring (35) is installed between the stationary iron core (32) and the moving iron core (33). The iron core spring (35) acts on the moving iron core (33) so that the second sealing element (331) always has the tendency to seal the piston channel (23).

7. A high-pressure solenoid valve according to claim 6, characterized in that: A sealing ring (311) is provided between the magnetic shielding tube (31) and the valve body (1).

8. A high-pressure solenoid valve according to claim 1, characterized in that: The axis of the piston passage (23) is coaxial with the central axis of the valve port (13).

9. A high-pressure solenoid valve according to claim 1, characterized in that: An input channel (16) for fluid medium to pass through is formed between the input port (11) and the first part (14), and an output channel (17) for fluid medium to pass through is formed between the valve port (13) and the output port (12).

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