Pilot integrated ultrahigh-pressure electromagnetic valve

Abstract

A circulation channel A is arranged in a valve body, the circulation channel A is separated by a vertical partition plate, a valve seat is arranged on the valve body, a lower valve body is arranged on the valve seat, a magnetism isolating ring and an upper valve body are sequentially arranged above the lower valve body, a magnetic conductive sheet is sleeved on the periphery of the lower portion of the lower valve body, and a magnetic conductive sheet is arranged on the periphery of the lower portion of the lower valve body. The peripheries of the lower valve body, the magnetism isolating ring and the upper valve body are sleeved with an electromagnetic coil assembly, the periphery of the upper valve body is sleeved with a nut, an installation cavity is formed in the lower valve body, the magnetism isolating ring and the upper valve body, a valve element, an armature, a small spring, a pole shoe and a large spring are sequentially installed in the installation cavity, a limiting rod penetrates into the armature, and the two ends of the limiting rod abut against the valve element and the pole shoe respectively. A circulation channel B is formed in the valve element, a sealing steel ball right facing the circulation channel B is arranged at the bottom of the armature, a circulation channel C is further formed in the valve element, and the bottom of the circulation channel C communicates with the circulation channel A on the left side of the vertical partition plate through a damping hole. The electromagnetic valve is compact in structure, small in size and high in response speed.

Description

A pilot-operated ultra-high pressure solenoid valve Technical Field

[0001] This utility model relates to a solenoid valve structure, and in particular to a pilot-operated integrated ultra-high pressure solenoid valve. Background Technology

[0002] Currently, pilot-operated ultra-high pressure solenoid valves used for ultra-high pressure gas control are of a split structure, consisting of a pilot valve and a main valve. The main valve opens via low-pressure gas supplied to the pilot valve. These split-type pilot-operated ultra-high pressure solenoid valves are relatively large and have a long response time, typically around 100ms. Therefore, developing a compact, small-sized, and fast-responding pilot-integrated ultra-high pressure solenoid valve has become a pressing technical challenge for the industry. Summary of the Invention

[0003] The purpose of this invention is to provide a pilot-operated integrated ultra-high pressure solenoid valve. This solenoid valve has a compact structure, small size, and fast response speed.

[0004] The technical solution of this utility model is as follows: A pilot-operated integrated ultra-high pressure solenoid valve includes a valve body with a T-shaped structure. The horizontal structure of the valve body has a flow channel A, which is divided by a vertical partition. Above the vertical partition is a valve seat, on which a lower valve body is installed. Above the lower valve body are a magnetic shielding ring and an upper valve body, respectively. A magnetic conductive sheet is sleeved on the lower outer periphery of the lower valve body. An electromagnetic coil assembly is sleeved on the outer periphery of the lower valve body, magnetic shielding ring, and upper valve body above the magnetic conductive sheet. A nut is sleeved on the outer periphery of the upper valve body above the electromagnetic coil assembly. The lower valve body, magnetic shielding ring, and upper valve body form an installation... The installation chamber contains, from bottom to top, a valve core, an armature, a small spring, a pole shoe, and a large spring. A limit rod is inserted through the armature, with its two ends abutting against the valve core and the pole shoe, respectively. The valve core has a flow channel B, and the bottom of the armature has a sealing steel ball facing the flow channel B. The two are combined to form an armature assembly. The length of the limit rod is greater than the length of the armature assembly. The armature has a flow groove, and the valve core also has a flow channel C. The bottom of the flow channel C is connected to the flow channel A on the left side of the vertical partition through a damping hole. The horizontal projection area of ​​the bottom of the valve core on the left side of the vertical partition is smaller than its top area.

[0005] In the aforementioned pilot-operated integrated ultra-high pressure solenoid valve, the valve core has a two-section variable diameter structure, with the upper section being smaller than the lower section; the lower valve body has a stepped bore structure, and the flow channel C includes a through hole located in the lower section of the valve core and a through groove located in the upper section of the valve core, the through hole and the through groove are connected, and the bottom of the through hole is connected to the damping hole.

[0006] In the aforementioned pilot-operated integrated ultra-high pressure solenoid valve, multiple sealing rings are sleeved on the outer periphery of the lower section of the valve core.

[0007] In the aforementioned pilot-operated integrated ultra-high pressure solenoid valve, there is a gap between the upper section of the valve core and the inner hole of the upper section of the lower valve body, and a support ring is sleeved on the outer periphery of the upper section of the valve core.

[0008] In the aforementioned pilot-operated integrated ultra-high pressure solenoid valve, the lower valve body is threaded onto the valve seat; the nut is threaded onto the upper valve body.

[0009] In the aforementioned pilot-operated integrated ultra-high pressure solenoid valve, the inner top surface of the nut, the top surface of the armature, and the top and bottom surfaces of the pole shoe are all provided with mounting grooves, and the small spring and the large spring are inserted into the mounting grooves.

[0010] In the aforementioned pilot-operated integrated ultra-high pressure solenoid valve, a protrusion is provided at the center of the bottom of the armature, and a mounting hole is provided at the protrusion, in which a sealing steel ball is installed.

[0011] In the aforementioned pilot-operated ultra-high pressure solenoid valve, two limit rods are symmetrically arranged with the axis of the armature as the center line.

[0012] The beneficial effects of this utility model are as follows: Compared with the prior art, the pilot-operated integrated ultra-high pressure solenoid valve adopting the above technical solution has a more compact overall structure, smaller size, and faster response speed, with a response time that can be improved to about 50ms. Therefore, the pilot-operated integrated ultra-high pressure solenoid valve of this utility model has good application value. Attached Figure Description

[0013] Figure 1 is a schematic diagram of the structure of this utility model;

[0014] Figure 2 is a schematic diagram of the valve core structure;

[0015] Figure 3 is a schematic diagram of the armature structure;

[0016] Figure 4 is a top view of the structure shown in Figure 3.

[0017] Reference numerals: 1-Valve body, 2-Flow channel A, 3-Vertical partition, 4-Valve seat, 5-Lower valve body, 6-Magnetic shielding ring, 7-Upper valve body, 8-Magnetic guide plate, 9-Electromagnetic coil assembly, 10-Nut, 11-Valve core, 12-Armature, 13-Small spring, 14-Pole shoe, 15-Large spring, 16-Limit rod, 17-Flow channel B, 18-Sealing steel ball, 19-Flow channel C, 20-Damping hole, 21-Support ring, 22-Sealing ring, 23-Through hole, 24-Through groove, 25-Protrusion, 26-Flow groove. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0019] An embodiment of this utility model: A pilot-operated integrated ultra-high pressure solenoid valve includes a valve body 1 with a T-shaped structure. The valve body 1 has a flow channel A2 inside its horizontal structure. The flow channel A2 is divided into left and right parts by a vertical partition 3. Above the vertical partition 3, the valve body 1 is a valve seat 4. A lower valve body 5 is installed on the valve seat 4. Above the lower valve body 5, from bottom to top, are arranged a magnetic shielding ring 6 and an upper valve body 7. A magnetic conductive sheet 8 is movably sleeved on the lower outer periphery of the lower valve body 5. Above the magnetic conductive sheet 8, an electromagnetic coil assembly 9 is movably sleeved on the outer periphery of the lower valve body 5, the magnetic shielding ring 6, and the upper valve body 7. The electromagnetic coil assembly 9 consists of an electromagnetic coil, a coil cover, etc. A nut 10 is sleeved on the outer periphery of the upper valve body 7 above the electromagnetic coil assembly 9. The nut 10 presses and fixes the electromagnetic coil assembly 9 and the magnetic conductive sheet 8. The lower valve body 5, the magnetic shielding ring 6, and the upper valve body 7 form an installation chamber. The chamber contains, from bottom to top, a valve core 11, an armature 12, a small spring 13, a pole shoe 14, and a large spring 15. A limit rod 16 is inserted through the armature 12, with its two ends abutting against the valve core 11 and the pole shoe 14, respectively. The valve core 11 has a flow channel B17, and the bottom of the armature 12 has a sealing steel ball 18 facing the flow channel B17. The armature 12 and the sealing steel ball 18 are connected together to form an armature assembly. The length of the limit rod 16 is greater than the length of the armature assembly. A flow groove 26 is provided on the outer periphery of the armature 12, penetrating its top and bottom. The valve core 11 outside the flow channel B17 also has a flow channel C19, which extends upward to the top surface of the valve core 11. The bottom of the flow channel C19 is connected to the flow channel A2 on the left side of the vertical partition 3 via a damping hole 20. The horizontal projection area of ​​the bottom of the valve core 11 on the left side of the vertical partition 3 is smaller than its top area.

[0020] Based on the structural analysis of the ultra-high pressure solenoid valve, its working principle is as follows: The ultra-high pressure solenoid valve of this utility model is a two-position normally closed solenoid valve.

[0021] In the power-off and no-load state, the valve core 11 is in the closed state under the elastic force of the large spring 15. That is, the large spring 15 presses its lower components, including the pole shoe 14, armature 12, and valve core 11, under the elastic force. At this time, the bottom surface of the valve core 11 abuts against the vertical partition 3, blocking the flow channel A2, that is, the passage between the lower cavity of the valve core 11 and the outlet. Under the spring force of the small spring 13, the armature assembly (armature 12 and sealing steel ball 18) keeps the sealing steel ball 18 abutting against the upper end face of the valve core 11, that is, the sealing steel ball 18 abutting against the upper port of the flow channel B17, thereby blocking the passage between the upper cavity of the valve core 11 and the outlet.

[0022] Under power-off load conditions, the pressure medium enters the flow channel A2 inlet. The pressure medium enters the flow channel A2 on the left side of the vertical partition 3. After being blocked by the vertical partition 3, it flows through the damping hole 20 from the lower cavity of the valve core 11 through the flow channel C19 to the space between the valve core 11 and the armature 12. Then, it flows through the flow groove 26 on the armature 12 to the space between the armature 12 and the pole shoe 14. When the sealing steel ball 18 abuts against the upper port of the flow channel B, due to the certain height of the exposed sealing steel ball 18, there is a certain gap between the bottom of the armature 12 and the upper end face of the valve core 11. Some pressure medium will enter this gap. The pressure medium in this gap exerts downward pressure on the valve core 11. Under the action of the large spring 15 and the pressure of the pressure medium, the valve core 11 is in the closed state, cutting off the passage between the lower cavity of the valve core 11 and the outlet. Furthermore, since the length of the limiting rod 16 is greater than the length of the armature assembly, the two ends of the limiting rod 16 abut against the pole shoe 14 and the valve core 11 to limit both of them. At this time, there is also a gap between the top surface of the armature 12 and the bottom surface of the pole shoe 14. Some of the pressure medium will enter this gap through the flow groove 26 and exert downward pressure on the armature 12. Under the action of the spring force of the small spring 15 and the pressure of the pressure medium, the armature assembly makes the sealing steel ball 18 tightly fit against the upper port of the flow channel B, thereby cutting off the passage between the upper cavity and the outlet of the valve core 11, and closing the inlet and outlet passages of the flow channel A2.

[0023] Under energized load conditions, the coil of the electromagnetic coil assembly 9 generates a magnetic field, creating a magnetic circuit between the pole shoe 14 and the armature 12. A magnetic force is generated between the pole shoe 14 and the armature 12. Under the action of the magnetic force, the armature 12 overcomes the pressure of the pressure medium, the spring force of the small spring 13, and the friction force, and moves upward to engage with the pole shoe 14. Since the length of the limiting rod 16 is greater than the length of the armature 12, when the armature assembly moves upward, the sealing steel ball 18 no longer abuts against the upper port of the flow channel B17. Due to the limiting effect of the limiting rod 16, the bottom surface of the limiting rod 16 still abuts against the upper end face of the valve core 11. The flow channel between the armature assembly and the valve core 11 is opened, that is, at this time the upper cavity of the valve core 11 is connected to the outlet flow channel. The pressure medium flows through the damping hole 20 from the lower cavity of the valve core 11 to the upper cavity of the valve core 11 and then to the outlet. Under the pressure difference between the inlet and outlet of the damping orifice 20, the valve core 11 moves upward against the spring force and friction of the large spring 15 under the medium pressure in its lower cavity, causing the bottom surface of the valve core 11 to separate from the vertical partition 3. The gap between the bottom surface of the valve core 11 and the vertical partition 3 connects the outlet and inlet of the flow channel A2, and the working medium flows from the lower cavity of the valve core 11 to the outlet.

[0024] When power is off, armature 12 moves downward against friction under the spring force of small spring 13. Sealing steel ball 18 abuts against the upper port of flow channel B, closing the flow channel between armature assembly and valve core 11, cutting off the channel between upper chamber and outlet of valve core 11. Since the force-bearing area of ​​upper chamber of valve core 11 is greater than that of lower chamber, valve core 11 moves downward against friction and pressure of lower chamber under the pressure of upper chamber pressure medium and spring force of large spring 15, causing bottom of valve core 11 to contact vertical partition 3, closing flow channel A2, and cutting off the channel between lower chamber and outlet of valve core 11. Therefore, the on / off control of working medium can be achieved by energizing and de-energizing electromagnetic coil assembly 9.

[0025] The valve core 11 has a two-section variable diameter structure, with the upper section being smaller than the lower section. The inner hole of the lower valve body 5 has a stepped hole structure, which matches the two-section variable diameter structure of the valve core 11, as shown in Figure 1. At this time, there is a gap between the stepped surface of the valve core 11 and the stepped surface of the inner hole of the lower valve body 5. This gap is the optimal stroke for the valve core 11 to move upward when the solenoid valve is opened. The stepped structure limits the stroke of the valve core 11, preventing it from moving upward continuously. The flow channel C19 includes a through hole 23 located in the lower section of the valve core 11 and a through groove 24 located in the upper section of the valve core 11. The through hole 23 and the through groove 24 are connected, and the bottom of the through hole 23 is connected to the damping hole 20. The medium in the flow channel A2 flows into the through hole 23 after passing through the damping hole 20, and then flows out of the through hole 23 and into the through groove 24.

[0026] Multiple sealing rings 22 are fitted around the lower outer periphery of the valve core 11 to provide a sealing function and prevent the medium from leaking out from the gap between the valve core 11 and the sealing rings 22.

[0027] There is a certain gap between the upper section of the valve core 11 and the inner hole of the upper section of the lower valve body 5. This gap is to facilitate the up-and-down sliding of the valve core 11. A support ring 21 is sleeved on the outer periphery of the upper section of the valve core 11. This support ring 21 can prevent the valve core 11 from shaking in the inner hole of the upper section of the lower valve body 5. The depth of the annular groove where the support ring 21 is located is less than the depth of the through groove 24. This ensures that the through grooves 24 on both sides of the support ring 21 are connected, preventing the support ring 21 from cutting off the through grooves 24 and ensuring that the medium can pass through the through grooves 24 smoothly.

[0028] The lower valve body 5 is threaded onto the valve seat 4, and the nut 10 is threaded onto the upper valve body 7. The components at both ends (valve seat 4, lower valve body 5, upper valve body 7, and nut 10) are connected by threaded connections, while other components are installed by mutual sliding connections, which allows for quick installation and disassembly of the solenoid valve.

[0029] The top inner surface of the nut 10, the top surface of the armature 12, and the top and bottom surfaces of the pole shoe 14 are all provided with mounting grooves. The small spring 13 and the large spring 15 are inserted into the mounting grooves to limit the movement of the small spring 13 and the large spring 15 and prevent the small spring 13 and the large spring 15 from tilting or being offset.

[0030] The armature 12 has a protrusion 25 at the bottom center, and a mounting hole is provided at the protrusion 25. A sealing steel ball 18 is installed in the mounting hole. The protrusion 25 is provided to facilitate the sealing steel ball 18 to be inserted into the mounting hole and then the protrusion part is squeezed and closed, thereby fixing the sealing steel ball 18 and the armature 12 into one piece to form an armature assembly.

[0031] The limiting rod 16 is symmetrically arranged with the axis of armature 12 as the center line in two places to ensure that the top and bottom surfaces of valve core 11 and pole shoe 14 are evenly distributed with force.

Claims

1. A pilot-operated integrated ultra-high pressure solenoid valve, characterized in that: The valve body (1) has a T-shaped structure. The horizontal structure of the valve body (1) has a flow channel A (2). The flow channel A (2) is separated by a vertical partition (3). The valve body (1) above the vertical partition (3) is a valve seat (4). A lower valve body (5) is installed on the valve seat (4). A magnetic shielding ring (6) and an upper valve body (7) are arranged sequentially above the lower valve body (5). A magnetic conductive sheet (8) is sleeved on the lower outer periphery of the lower valve body (5). An electromagnetic coil assembly (9) is sleeved on the outer periphery of the lower valve body (5), the magnetic shielding ring (6), and the upper valve body (7) above the magnetic conductive sheet (8). A nut (10) is sleeved on the outer periphery of the upper valve body (7) above the electromagnetic coil assembly (9). The lower valve body (5), the magnetic shielding ring (6), and the upper valve body (7) form an installation chamber. A valve core (11) is installed in the installation chamber from bottom to top. The armature (12), small spring (13), pole shoe (14) and large spring (15) are connected. A limit rod (16) is inserted into the armature (12). The two ends of the limit rod (16) abut against the valve core (11) and the pole shoe (14) respectively. A flow channel B (17) is provided on the valve core (11). A sealing steel ball (18) facing the flow channel B (17) is provided at the bottom of the armature (12). The two are combined to form an armature assembly. The length of the limit rod (16) is greater than the length of the armature assembly. A flow groove (26) is provided on the armature (12). A flow channel C (19) is also provided on the valve core (11). The bottom of the flow channel C (19) is connected to the flow channel A (2) on the left side of the vertical partition (3) through the damping hole (20). The horizontal projection area of ​​the bottom of the valve core (11) on the left side of the vertical partition (3) is smaller than its top area.

2. The pilot-operated integrated ultra-high pressure solenoid valve according to claim 1, characterized in that: The valve core (11) is a two-section variable diameter structure, with the upper section being smaller than the lower section. The inner hole of the lower valve body (5) is a stepped hole structure. The flow channel C (19) includes a through hole (23) located in the lower section of the valve core (11) and a through groove (24) located in the upper section of the valve core (11). The through hole (23) and the through groove (24) are connected, and the bottom of the through hole (23) is connected to the damping hole (20).

3. The pilot-operated integrated ultra-high pressure solenoid valve according to claim 2, characterized in that: Multiple sealing rings (22) are fitted onto the outer periphery of the lower section of the valve core (11).

4. The pilot-operated integrated ultra-high pressure solenoid valve according to claim 2, characterized in that: There is a gap between the upper section of the valve core (11) and the inner hole of the upper section of the lower valve body (5), and a support ring (21) is sleeved on the outer periphery of the upper section of the valve core (11).

5. The pilot-operated integrated ultra-high pressure solenoid valve according to claim 1, characterized in that: The lower valve body (5) is threaded onto the valve seat (4); the nut (10) is threaded onto the upper valve body (7).

6. The pilot integrated ultrahigh pressure solenoid valve according to claim 1, wherein: The top surface of the nut (10), the top surface of the armature (12), and the top and bottom surfaces of the pole shoe (14) are all provided with mounting grooves, and the small spring (13) and the large spring (15) are inserted into the mounting grooves.

7. The pilot integrated ultrahigh pressure solenoid valve according to claim 1, wherein: The armature (12) has a protrusion (25) at the bottom center, and a mounting hole is provided at the protrusion (25), in which a sealing steel ball (18) is installed.

8. The pilot-operated integrated ultra-high pressure solenoid valve according to claim 1, characterized in that: The limiting rod (16) is symmetrically arranged on the left and right sides with the axis of the armature (12) as the center line.

Images