Pilot operated solenoid valve with high speed response module

Abstract

The utility model discloses a pilot type electromagnetic valve with high speed response module, include: main valve body and fixed in the valve seat one end of main valve body, still include: install in the pilot valve main part of valve seat top, pilot valve main part one end is equipped with the connecting shell, and the one side outer wall of main valve body is equipped with a plurality of equidistance distribution's fluid interface, the main valve body in movable mounting has the main valve core. The utility model discloses a pilot type electromagnetic valve with high speed response module, and the core advantage of this electromagnetic valve is high speed response: through "electric - magnetic - mechanical" direct drive, and the pilot coil is electrified and generates magnetism, directly drives the pilot valve core stem, pilot valve core axial movement, spares the traditional "pilot valve accuse pressure - pressure drive main valve core" link, and the action delay is greatly shortened, and the fluid is cut off quickly. At the same time, multiple sealing leakproofness keeps precision, and the sealed air cushion buffering reduces pressure, and the pressure sensor stabilizes voltage, and the component is fixed firm, and the operation is stable and durable, and is suitable for high speed fluid control scene.

Description

Technical Field

[0001] This utility model relates to the field of solenoid valve technology, specifically a pilot-operated solenoid valve with a high-speed response module. Background Technology

[0002] In industrial production, pilot-operated solenoid valves, as key components of fluid control, are widely used in various scenarios requiring the control of fluid flow. However, existing pilot-operated solenoid valves have the following shortcomings: Traditional structures rely on an indirect drive method of "pilot valve pressure control - pressure-driven main valve core". There is a delay in the intermediate pressure transmission link, which makes it difficult to meet the requirements of working conditions with high fluid on / off control speed. Utility Model Content

[0003] The purpose of this invention is to provide a pilot-operated solenoid valve with a high-speed response module to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a pilot-operated solenoid valve with a high-speed response module, comprising: a main valve body and a valve seat fixed to one end of the main valve body, and further comprising: a pilot valve body installed on the top of the valve seat, wherein a connecting shell is installed at one end of the pilot valve body, and multiple fluid interfaces are provided on the outer wall of one side of the main valve body, a main valve core is movably installed inside the main valve body, and a fixing component is installed inside the pilot valve body, a pilot coil is installed inside the fixing component, and a pilot valve core rod and a pilot valve core are respectively provided at the top and bottom of the fixing component, a pressure sensor is installed on the top of the valve seat, and a return spring is connected to one end of the main valve core.

[0005] A first sealing ring is provided at the connection between the bottom of the pilot valve body and the top of the valve seat.

[0006] The outer wall of the main valve core is provided with an annular groove, and the valve core seal is embedded in the annular groove.

[0007] The other end of the main valve core is equipped with a sealing gasket, and the surface of the sealing gasket has a micro pressure relief hole.

[0008] The pilot coil is connected to an external control circuit. When energized, the magnetic field drives the pilot valve core rod to move the pilot valve core axially.

[0009] A second sealing ring is fitted between one end of the main valve core and the inner wall of the main valve body.

[0010] Compared with the prior art, the beneficial effects of this utility model are: This invention relates to a pilot-operated solenoid valve with a high-speed response module. The core advantage of this solenoid valve is its high-speed response: it is directly driven via an "electromagnetic-mechanical" system. The pilot coil is energized to generate magnetism, directly driving the pilot valve core rod and axial movement of the pilot valve core. This eliminates the traditional "pilot valve pressure control - pressure-driven main valve core" step, significantly reducing action delay and quickly achieving fluid flow control. Simultaneously, it features multiple seals to prevent leakage and ensure accuracy, a sealing air cushion for pressure reduction, a pressure sensor for pressure stabilization, and firmly fixed components, ensuring stable and durable operation, making it suitable for high-speed fluid control scenarios. Attached Figure Description

[0011] Figure 1 This is an external structural view of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a cross-sectional view of the fastener of this utility model; Figure 4 This is a structural diagram of the main valve core of this utility model.

[0012] In the diagram: 1. Main valve body; 2. Valve seat; 3. Pilot valve body; 4. Connecting shell; 5. Fluid interface; 6. Main valve core; 7. Fixing component; 8. Pilot coil; 9. Pilot valve core rod; 10. Pilot valve core; 11. First sealing ring; 12. Pressure sensor; 13. Valve core seal; 14. Return spring; 15. Sealing gasket; 16. Second sealing ring. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] Please see Figure 1-4 This utility model provides a pilot-operated solenoid valve with a high-speed response module, comprising: a main valve body 1 and a valve seat 2 fixed to one end of the main valve body 1, and further comprising: a pilot valve body 3 installed on the top of the valve seat 2, a connecting shell 4 installed at one end of the pilot valve body 3, and multiple fluid interfaces 5 evenly distributed on one side of the outer wall of the main valve body 1, a main valve core 6 movably installed inside the main valve body 1, and a fixing member 7 installed inside the pilot valve body 3, a pilot coil 8 installed inside the fixing member 7, and a pilot valve core rod 9 and a pilot valve core 10 respectively provided at the top and bottom of the fixing member 7, a pressure sensor 12 installed on the top of the valve seat 2, and a return spring 14 connected to one end of the main valve core 6.

[0015] It should be noted that: In the initial state, the return spring 14 is in a natural extension and retraction state, pushing the main valve core 6 to block the internal flow channel of the main valve body 1, preventing fluid from entering or exiting through the fluid interface 5, and the solenoid valve is in the closed state; the pressure sensor 12 monitors the fluid pressure in the top area of ​​the valve seat 2 in real time, providing data reference for control; the connecting shell 4 protects the components at one end of the pilot valve body 3, and the fixing part 7 stably fixes the pilot coil 8 inside the pilot valve body 3, ensuring the stability of the component position.

[0016] Conduction process: When the external control circuit energizes the pilot coil 8, the pilot coil 8 generates a magnetic field. The magnetic field drives the pilot valve core rod 9 to move downward along the axis, thereby pushing the pilot valve core 10 linked with it to move synchronously. The action of the pilot valve core 10 directly acts on the main valve core 6, overcoming the elastic force of the return spring 14 and pushing the main valve core 6 to move inside the main valve body 1, opening the internal flow channel of the main valve body 1. At this time, the fluid enters through the fluid interface 5 on one side of the main valve body 1, and flows out through the opened flow channel from the fluid interface 5 on the other side, realizing fluid conduction.

[0017] Closing and Reset Process: When the pilot coil 8 is de-energized, the magnetic field disappears, the pilot valve core rod 9 and pilot valve core 10 lose their driving force, the reset spring 14 recovers its deformation, pushes the main valve core 6 to move in the opposite direction, re-blocks the internal flow channel of the main valve body 1, and the fluid flow is interrupted; at the same time, the reverse movement of the main valve core 6 drives the pilot valve core 10 and pilot valve core rod 9 to reset, return to the initial state, and wait for the next action command; the pressure sensor 12 continuously monitors the pressure change to ensure that the pressure is stable throughout the process and avoids abnormal pressure from affecting the accuracy of component operation.

[0018] In a preferred embodiment, a first sealing ring 11 is provided at the connection between the bottom of the pilot valve body 3 and the top of the valve seat 2.

[0019] It should be noted that during the entire process of the solenoid valve's operation—opening, closing, and resetting—the connection between the pilot valve body 3 and the valve seat 2 is a critical point where fluid leakage is likely. The first sealing ring 11 fits tightly against the connection surface, effectively preventing fluid inside the main valve body 1 from leaking out from this connection.

[0020] In a preferred embodiment, the outer wall of the main valve core 6 is provided with an annular groove, and the valve core seal 13 is embedded in the annular groove.

[0021] It should be noted that when the main valve core 6 moves axially within the main valve body 1 to open or close the flow channel, the valve core seal 13, embedded in the annular groove of the main valve core 6, remains tightly fitted to the inner wall of the main valve body 1. During the fluid flow phase, this prevents fluid from flowing through the gap between the main valve core 6 and the main valve body 1, ensuring that fluid only enters and exits through the fluid interface 5 along the preset flow channel. During the fluid closure phase, it enhances the sealing effect of the main valve core 6 on the flow channel, preventing "incomplete closure." Simultaneously, the annular groove design ensures the valve core seal 13 is securely installed and will not fall off or shift due to frequent movement of the main valve core 6, guaranteeing reliable sealing during long-term use.

[0022] In a preferred embodiment, a sealing gasket 15 is installed at the other end of the main valve core 6, and a micro pressure relief hole is opened on the surface of the sealing gasket 15.

[0023] It should be noted here that: buffering and sealing: when the main valve core 6 moves in the opposite direction under the action of the return spring 14 until it fits against the corresponding part inside the main valve body 1, the sealing air pad 15 can buffer the impact force generated at the moment of contact between the two, avoid damage to the main valve core 6 and the valve body due to rigid collision, and extend the service life of the components; at the same time, the elastic properties of the sealing air pad 15 itself can enhance the sealing effect of the contact surface, further preventing fluid leakage.

[0024] Pressure balance: During the rapid action of the main valve core 6, especially during the closing process, a local area in the main valve body 1 is prone to instantaneous high pressure. The micro pressure relief hole on the surface of the sealing gasket 15 can quickly release this part of the high pressure, avoid the high pressure from causing resistance to the action of the main valve core 6, ensure that the main valve core 6 can be smoothly reset or in place, and at the same time prevent high pressure from damaging the sealing components, ensuring the timeliness and stability of the solenoid valve action.

[0025] In a preferred embodiment, the pilot coil 8 is connected to an external control circuit. After being energized, the magnetic field drives the pilot valve core rod 9 to move the pilot valve core 10 axially.

[0026] It should be noted that after the external control circuit inputs an electrical signal to the pilot coil 8, the pilot coil 8 quickly generates a magnetic field. This magnetic field creates an axial driving force on the pilot valve core rod 9 (without relying on indirect drive by fluid pressure), causing the pilot valve core rod 9 to drive the pilot valve core 10 to move rapidly along the axial direction. This direct "electromagnetic-mechanical" drive method eliminates the intermediate pressure transmission link of "pilot valve pressure control - pressure drive main valve core" in traditional solenoid valves, significantly shortening the time difference from control signal input to pilot component action. At the same time, the axial movement makes the actions of the pilot valve core rod 9 and pilot valve core 10 precise and controllable, and can quickly transmit the driving force to the main valve core 6, ultimately achieving high-speed response of the solenoid valve and meeting the requirements of high fluid on / off control speed.

[0027] In a preferred embodiment, a second sealing ring 16 is fitted between one end of the main valve core 6 and the inner wall of the main valve body 1.

[0028] It should be noted here that one end of the main valve core 6 is the key part where it connects to the return spring 14 and bears force, and it is also the area where fluid is prone to leaking from the gap between the end of the main valve core 6 and the inner wall of the main valve body 1. The second sealing ring 16 is fitted at this gap, forming a "double sealing" structure with the valve core seal 13: the valve core seal 13 focuses on the circumferential sealing of the outer wall of the main valve core 6, while the second sealing ring 16 focuses on the radial sealing of the end of the main valve core 6. The two work together to completely block any leakage of fluid from the gap between the main valve core 6 and the inner wall of the main valve body 1. At the same time, the second sealing ring 16 can also reduce the friction between the end of the main valve core 6 and the inner wall of the main valve body 1, making the axial movement of the main valve core 6 smoother and avoiding the impact of frictional resistance on the response speed and action accuracy of the solenoid valve.

[0029] Working principle: I. Initial Closed State When the return spring 14 is in a natural extension and retraction state, it pushes the main valve core 6 to maintain a specific position inside the main valve body 1 by its own elastic force, directly blocking the fluid flow channel inside the main valve body 1. At this time, the fluid cannot enter or exit through the multiple fluid ports 5 on one side of the main valve body 1, and the solenoid valve is in a closed state.

[0030] The fixing component 7 securely fixes the pilot coil 8 inside the pilot valve body 3, preventing the pilot coil 8 from shifting due to external vibrations and other factors; the connecting shell 4 is installed at one end of the pilot valve body 3, providing physical protection for internal components such as the pilot valve core rod 9 and the pilot valve core 10, reducing interference from external impurities.

[0031] Pressure sensor 12 is fixed to the top of valve seat 2 to monitor the fluid pressure in the area between valve seat 2 and pilot valve body 3 in real time, providing pressure data reference for subsequent control actions; at the same time, first sealing ring 11 is attached to the connection between the bottom of pilot valve body 3 and the top of valve seat 2, second sealing ring 16 is sleeved between one end of main valve core 6 and the inner wall of main valve body 1, and valve core seal 13 is embedded in the annular groove on the outer wall of main valve core 6. The three together form a sealing system to prevent fluid leakage.

[0032] II. Conductivity Process When the external control circuit inputs an electrical signal to the pilot coil 8, the pilot coil 8 rapidly generates a magnetic field. This magnetic field creates an axial driving force on the pilot valve core rod 9, causing it to move downwards along the axial channel of the fixing member 7. This, in turn, pushes the pilot valve core 10, which is linked to it, to move downwards synchronously. This process is directly driven by an "electromagnetic-mechanical" system, eliminating the intermediate step of "pilot valve pressure control - pressure driving main valve core" in traditional solenoid valves, thus laying the foundation for high-speed response.

[0033] After the pilot valve core 10 moves down, its end directly acts on the top of the main valve core 6. The driving force overcomes the elastic force of the return spring 14 and pushes the main valve core 6 to move axially in the main valve body 1. The internal flow channel of the main valve body 1, which was originally blocked, is then opened.

[0034] After the flow channel is opened, the fluid enters through the fluid interface 5 on one side of the main valve body 1, flows out through the internal flow channel of the main valve body 1 and exits through the fluid interface 5 on the other side, thus achieving fluid conduction. During this process, the valve core seal 13 is always tightly fitted to the inner wall of the main valve body 1 to prevent the fluid from flowing through the gap between the main valve core 6 and the main valve body 1, ensuring that the fluid flows along the preset flow channel. The pressure sensor 12 continuously monitors pressure changes to ensure pressure stability during the flow process.

[0035] III. Shutdown and Reset Process When the external control circuit cuts off the power supply to the pilot coil 8, the magnetic field generated by the pilot coil 8 disappears, and the pilot valve core rod 9 and the pilot valve core 10 lose the magnetic field driving force and stop moving downward.

[0036] The return spring 14 restores its deformation and pushes the main valve core 6 to move in the opposite direction along the axis by means of its elasticity, gradually blocking the internal flow channel of the main valve body 1, and the fluid flow is interrupted. At the same time as the main valve core 6 moves in the opposite direction, it drives the pilot valve core 10 and the pilot valve core rod 9 in contact with it to reset upward synchronously and return to the initial position.

[0037] During this process, the sealing gasket 15 at the other end of the main valve core 6 plays a role: when the main valve core 6 moves in the opposite direction to fit with the corresponding part inside the main valve body 1, the sealing gasket 15 buffers the impact force at the moment of contact between the two, preventing the main valve core 6 and the main valve body 1 from being damaged due to rigid collision; at the same time, if a momentary high pressure is formed inside the main valve body 1, the micro pressure relief hole on the surface of the sealing gasket 15 can quickly release the high pressure, preventing the high pressure from hindering the reset of the main valve core 6 and ensuring smooth operation; the pressure sensor 12 continuously monitors the pressure to ensure that the pressure is stable throughout the reset process and to avoid abnormal pressure affecting the accuracy of the component operation.

[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A pilot-operated solenoid valve with a high-speed response module, comprising: The main valve body (1) and the valve seat (2) fixed to one end of the main valve body (1); The feature is that it further includes: a pilot valve body (3) installed on the top of the valve seat (2), a connecting shell (4) installed at one end of the pilot valve body (3), and multiple fluid interfaces (5) distributed at equal intervals on one side of the outer wall of the main valve body (1), a main valve core (6) movably installed in the main valve body (1), and a fixing member (7) installed in the pilot valve body (3), a pilot coil (8) installed in the fixing member (7), and a pilot valve core rod (9) and a pilot valve core (10) respectively provided at the top and bottom of the fixing member (7), a pressure sensor (12) installed on the top of the valve seat (2), and a return spring (14) connected to one end of the main valve core (6).

2. The pilot-operated solenoid valve with a high-speed response module according to claim 1, characterized in that: The pilot valve body (3) is provided with a first sealing ring (11) at the connection between the bottom and the top of the valve seat (2).

3. The pilot-operated solenoid valve with a high-speed response module according to claim 1, characterized in that: The outer wall of the main valve core (6) is provided with an annular groove, and the valve core seal (13) is embedded in the annular groove.

4. A pilot-operated solenoid valve with a high-speed response module according to claim 1, characterized in that: The other end of the main valve core (6) is equipped with a sealing gasket (15), and a micro pressure relief hole is opened on the surface of the sealing gasket (15).

5. A pilot-operated solenoid valve with a high-speed response module according to claim 1, characterized in that: The pilot coil (8) is connected to an external control circuit. After being energized, the magnetic field drives the pilot valve core rod (9) to move the pilot valve core (10) axially.

6. A pilot-operated solenoid valve with a high-speed response module according to claim 1, characterized in that: The second sealing ring (16) is fitted between one end of the main valve core (6) and the inner wall of the main valve body (1).

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