A solenoid valve device with pressure reduction and quick start

Abstract

The present invention discloses an electromagnetic valve device with pressure reduction and quick start, comprising a valve body, a driving coil, a valve core assembly and a closing spring. The valve core assembly comprises a moving iron core, a main sealing cover and a limiting sleeve fixed on the moving iron core. A pressure relief port is provided on the main sealing cover. The moving iron core and the main sealing cover can be relatively moved a certain distance and a limiting structure is provided between the two. When the driving coil is energized, the moving iron core rises and moves under the action of electromagnetic force, and drives the limiting sleeve to overcome the spring force and generate displacement between the moving iron core and the main sealing cover, first opening the pressure relief port, and then the moving iron core drives the main sealing cover to move upward synchronously through the limiting structure, thereby reopening the main valve port. When the electromagnetic valve device of the present invention is energized, the pressure relief port is first opened to relieve pressure, and after the pressure is reduced, the main valve port can be easily opened to obtain a higher working pressure, thereby achieving pressure reduction and quick start, reducing production costs, and improving the market competitiveness of the product.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and in particular to a solenoid valve device capable of rapid start-up with reduced pressure. Background Art

[0002] Solenoid valves are industrial equipment controlled by electromagnetics. They are basic automation components used to control fluids. They are actuators used in industrial control systems to adjust the direction, flow, speed and other parameters of the medium. They can be used in pipeline transportation systems such as steam pipes, gas pipes and natural gas pipelines, and are widely used in our daily lives.

[0003] In daily life and industrial production, commonly used solenoid valves can be mainly divided into direct-acting solenoid valves and pilot-operated solenoid valves. The pilot-operated solenoid valve drives the valve core of the main valve to move back and forth through the diaphragm and piston to pass the pressure of the fluid. The overall structure of this solenoid valve is relatively complex and the volume is also large, which is prone to low flow rate at low pressure. The direct-acting solenoid valve commonly used by people is mainly composed of an electromagnetic coil, a static iron core, and a moving iron core. It also contains a valve body with one or more valve holes, a return spring between the valve body and the valve core, and an air inlet cavity and an air outlet cavity connected to the valve hole on both sides of the valve body. A sealing plug or sealing cover is provided on the moving iron core. When the coil is energized or de-energized, the moving iron core is driven to drive the sealing cover to open or cut off the valve body, thereby opening Open or close the solenoid valve. Although this traditional solenoid valve can fully open the valve hole in a very short time after being energized, the following problems are often encountered in actual use: Since the sealing cover and the air intake chamber are on the same side, the greater the intake pressure, the greater the pressure of the sealing cover pressing down on the valve hole. Therefore, the force required to open the valve hole is also greater. In order to obtain a higher working pressure, the traditional method is to increase the power of the electromagnetic coil so that the moving iron core is subjected to a greater electromagnetic force to drive the sealing cover to open. This will increase the volume of the electromagnetic coil and the product, thereby increasing production costs and reducing market competitiveness. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the problem in the prior art of increasing the power of the electromagnetic coil so that the moving iron core drives the sealing cover to open under the action of a larger electromagnetic force, which leads to an increase in the volume of the electromagnetic coil and the product, increases production costs, and reduces market competitiveness.

[0005] To solve the above technical problems, the present invention provides a solenoid valve device with a reduced pressure and quick start, comprising a valve body, a driving coil and a valve core assembly arranged in the valve body, the valve body comprising a main valve port arranged between an air inlet chamber and an air outlet chamber corresponding to the valve core assembly, a closing spring arranged between the valve core assembly and the valve body to force the valve core assembly to move toward one side of the main valve port, the valve core assembly comprising a moving iron core that moves up and down along the axial direction of the main valve port, and a main sealing cover arranged at one end of the moving iron core for closing the main valve port;

[0006] A limiting sleeve is fixedly provided on the moving iron core, which is limited to the lower end of the closing spring. The limiting sleeve cooperates with and presses against the main sealing cover. The moving iron core and the main sealing cover can be arranged to move relative to each other by a certain distance. The main sealing cover is provided with a pressure relief port for connecting the air inlet chamber and the main valve port. The moving iron core seals and presses the pressure relief port under the action of the closing spring. A limiting structure is provided between the moving iron core and the main sealing cover to form a limiting cooperation after the two move relative to each other by a certain distance; when the moving iron core is driven upward by the driving coil, it has a pressure relief stage in which it drives the limiting sleeve to move away from the main sealing cover to open the pressure relief port, and an opening stage in which the main sealing cover is driven upward by the limiting structure to open the main valve port.

[0007] In the above-mentioned solenoid valve device, the main sealing cover includes a movable groove movably connected to one end of the moving iron core, the pressure relief port is arranged at the bottom center of the movable groove, and a pressure relief sealing gasket is provided on one end of the moving iron core for closing or opening the pressure relief port.

[0008] In the above-mentioned solenoid valve device, the limiting structure includes an annular groove arranged on the side wall of the movable groove, a limiting clamping ring arranged in the annular groove, and an annular limiting protrusion formed on the outer peripheral side wall of one end of the moving iron core. The limiting clamping ring partially extends into the movable groove and is located on the upper side of the annular limiting protrusion, so that when the moving iron core moves upward relative to the main sealing cover, the annular limiting protrusion is driven to cooperate with the limiting clamping ring.

[0009] In the above-mentioned solenoid valve device, a ring-shaped clearance groove is formed on the side wall of the moving iron core and is located on the upper side of the annular limiting protrusion, and the limiting collar is accommodated between the annular groove and the clearance groove.

[0010] In the above-mentioned solenoid valve device, at least one air-passing plane is formed on the edge of the annular limiting protrusion, and a gap is formed between the air-passing plane and the side wall of the movable groove.

[0011] In the above-mentioned solenoid valve device, one end surface of the moving iron core is an arc surface structure, and a limiting groove for positioning and installing the pressure relief sealing gasket is provided at the center of the arc surface structure.

[0012] In the above-mentioned solenoid valve device, an annular protruding tip structure protruding into the movable groove is provided at the upper end of the pressure relief port, and the pressure relief sealing gasket is fitted and abutted against the protruding tip structure.

[0013] In the above-mentioned solenoid valve device, the limit sleeve is fixed to the moving iron core through a retaining ring, the top of the main sealing cover is provided with a step structure that cooperates with the limit sleeve, and the bottom is provided with a main sealing gasket that seals with the main valve port.

[0014] In the above-mentioned solenoid valve device, a static tube sleeve suitable for accommodating the moving iron core is provided in the central cavity of the driving coil, so that the moving iron core can be movably arranged in the static tube sleeve, and a flow regulating screw movable along its axial direction is passed through the static tube sleeve, and the flow regulating screw is arranged opposite to the other end of the moving iron core.

[0015] In the above-mentioned solenoid valve device, a motion guide structure is arranged between the flow regulating screw and the moving iron core, and the motion guide structure includes a guide hole arranged on the flow regulating screw along the axial extension of the static pipe sleeve, and a motion guide rod connected to the other end of the moving iron core, and the motion guide rod is slidably connected to the guide hole.

[0016] The technical solution of the present invention has the following advantages over the prior art:

[0017] 1. In the solenoid valve device provided by the present invention, the movable iron core is arranged to be movable a certain distance relative to the main sealing cover, and a limiting structure forming a limiting fit is provided between the two. By providing a pressure relief port on the main sealing cover, when the driving coil is de-energized, the movable iron core drives the main sealing cover to close on the main valve port under the action of the spring force, and at the same time seals the pressure relief port; and when the driving coil is energized, the movable iron core moves upward under the action of the electromagnetic force. Since the main sealing cover is pressed against the main valve port under the action of gravity and the intake pressure and is still in a downward force state, the movable iron core drives the limiting sleeve to overcome the spring force and move upward and generate displacement between the movable iron core and the main sealing cover, thereby opening the pressure relief port first, which is beneficial to First, some of the intake pressure is released so that the pressure of the intake pressure on the main sealing cover is also reduced accordingly, so that the main valve port can be opened more easily. As the moving iron core continues to rise, it will drive the main sealing cover to move up synchronously through the limit structure, thereby opening the main valve port and realizing the opening of the solenoid valve. The entire opening process is completed quickly in a short time. The solenoid valve device designed in this way first opens the pressure relief port to relieve the pressure when it is powered on. After the pressure is reduced, the main valve port can be easily opened to obtain a higher working pressure, thereby achieving the purpose of rapid start-up by reducing pressure. It also avoids the traditional method of increasing the coil power, which is conducive to reducing production costs, reducing product volume, and improving product performance and market competitiveness.

[0018] 2. In the solenoid valve device provided by the present invention, the limiting structure includes a limiting clamping ring arranged on the side wall of the movable groove of the main sealing cover, and an annular limiting protrusion formed on the outer peripheral side wall of one end of the moving iron core. With this structural arrangement, when the moving iron core rises a certain distance relative to the main sealing cover, the annular limiting protrusion will be driven to come into contact with the limiting clamping ring. The limiting cooperation formed by the cooperation between the annular limiting protrusion and the limiting clamping ring can prevent one end of the moving iron core from escaping from the movable groove during the upward movement, and can also form a linkage cooperation between the moving iron core and the main sealing cover. When the moving iron core rises and contacts the limiting clamping ring, the main sealing cover is driven to move synchronously to open the main valve port. The structural arrangement is simple and the cooperation is reliable.

[0019] 3. In the solenoid valve device provided by the present invention, at least one air-passing plane is formed on the edge of the annular limiting protrusion, and a gap is formed between the air-passing plane and the side wall of the movable groove. This air-passing plane design can increase the air intake volume between the moving iron core and the movable groove, which is beneficial to improving the pressure relief flow when the pressure relief port is opened, and the pressure reduction speed is fast.

[0020] 4. In the solenoid valve device provided by the present invention, the opening distance between the valve core assembly and the main valve port is determined by the movement stroke of the moving iron core. A flow regulating screw opposite to the other end of the moving iron core is provided on the static pipe sleeve. This flow regulating screw is threadedly connected to the static pipe sleeve and can move downward along the axial direction of the static pipe sleeve when rotated. This reduces the stroke gap between the flow regulating screw and the moving iron core, that is, reduces the upward distance of the moving iron core, thereby achieving the purpose of adjusting the opening distance of the valve core assembly, which can be used to adjust the flow of the main valve port.

[0021] 5. In the solenoid valve device provided by the present invention, a guide hole is provided on the flow regulating screw along the axial extension of the static pipe sleeve, and a moving guide rod slidably connected to the guide hole is provided on the other end of the moving iron core. The advantage of this design is that the moving guide rod plays a movement guiding role for the moving iron core, thereby improving the stability and reliability of the reciprocating movement of the moving iron core between the static pipe sleeve and the main valve port, so that the main sealing cover on one end of the moving iron core remains opposite to the main valve port, ensuring that the main sealing cover can be accurately and tightly closed at the main valve port, thereby ensuring that the product operation is more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1A schematic structural diagram of the solenoid valve device provided by the present invention in a closed state;

[0024] Figure 2 A schematic structural diagram of the solenoid valve device provided by the present invention in an open state;

[0025] Figure 3 for Figure 1 A partially enlarged structural diagram of the valve core assembly is shown, particularly showing the pressure relief port in a closed state;

[0026] Figure 4 for Figure 2 A partial enlarged structural diagram of the valve core assembly is shown, particularly showing the pressure relief port in an open state;

[0027] Figure 5 Schematic diagram of the structure of the moving iron core of the present invention;

[0028] Explanation of the accompanying symbols: 1. Valve body; 11. Main valve port; 12. Air inlet chamber; 13. Air outlet chamber; 2. Drive coil; 3. Moving iron core; 31. Pressure relief seal; 32. Air passing plane; 4. Main sealing cover; 41. Pressure relief port; 42. Movable groove; 43. Protruding tip structure; 44. Main sealing gasket; 45. Step structure; 5. Closing spring; 6. Limiting sleeve; 7. Limiting structure; 71. Limiting clamp; 72. Annular limiting protrusion; 73. Make way groove; 8. Static pipe sleeve; 9. Flow regulating screw; 91. Guide hole; 92. Motion guide rod. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] In the description of the present invention, it should be noted that the terms "first", "second" and "third" are only used for descriptive purposes and should not be understood as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two components.

[0032] Example 1

[0033] The present embodiment will be described in detail below with reference to the accompanying drawings:

[0034] This embodiment provides Figure 1-5The illustrated embodiment shows a solenoid valve device with a reduced pressure and quick start, comprising a valve body 1, a drive coil 2 and a valve core assembly disposed on the valve body 1. The valve body 1 includes a main valve port 11 disposed between an air inlet chamber 12 and an air outlet chamber 13 corresponding to the valve core assembly. A closing spring 5 is disposed between the valve core assembly and the valve body 1 to force the valve core assembly to move toward the main valve port 11. The valve core assembly includes a movable iron core 3 that moves up and down along the axial direction of the main valve port 11, and a main sealing cover 4 disposed at one end of the movable iron core 3 for closing the main valve port 11.

[0035] The movable iron core 3 is fixedly provided with a limit sleeve 6 which is limited to the lower end of the closing spring 5, and the upper end of the closing spring 5 is abutted in the groove of the valve body 1, and the limit sleeve 6 cooperates to press against the main sealing cover 4, and the movable iron core 3 and the main sealing cover 4 can be arranged to move relative to each other by a certain distance, and the main sealing cover 4 is provided with a pressure relief port 41 for connecting the air inlet chamber 12 and the main valve port 11, and the movable iron core 3 seals and presses the pressure relief port 41 under the action of the closing spring 5, and a limit structure 7 is provided between the movable iron core 3 and the main sealing cover 4 to form a limit fit after the two move relative to each other by a certain distance; when the movable iron core 3 is driven upward by the driving coil 2, it has a pressure relief stage in which it drives the limit sleeve 6 to move away from the main sealing cover 4 to open the pressure relief port 41, and an opening stage in which the main sealing cover 4 is driven upward by the limit structure 7 to open the main valve port 11.

[0036] In the above embodiment, the moving iron core 3 is movable relative to the main sealing cover 4 by a certain distance, and a pressure relief port 41 is provided on the main sealing cover 4. Figure 1 and Figure 3 , when the drive coil is powered off, the moving iron core 3 drives the main sealing cover 4 to close on the main valve port 11 under the action of the spring force, and at the same time closes the pressure relief port 41; and Figure 2 and Figure 4When the driving coil 2 is energized, the moving iron core 3 moves upward under the action of the electromagnetic force. Since the main sealing cover 4 is pressed against the main valve port 11 under the action of gravity and the intake pressure, it is still in a downward force state. At this time, the moving iron core 3 drives the limit sleeve 6 to overcome the spring force and move upward and generate displacement between it and the main sealing cover 4, thereby first opening the pressure relief port 41, which is conducive to first releasing part of the intake pressure, so that the pressure of the intake pressure on the main sealing cover 4 is also correspondingly reduced, so that it is easier to open the main valve port 11. As the moving iron core continues to rise, it will drive the main sealing cover 4 to move upward synchronously through the limit structure 7, thereby opening the main valve port 11 again, realizing the opening of the solenoid valve. The entire opening process is completed quickly in a short time. The solenoid valve device designed in this way first opens the pressure relief port to relieve pressure when it is energized. After the pressure is reduced, the main valve port can be easily opened to obtain a higher working pressure, thereby achieving the purpose of rapid start-up by reducing pressure. It also avoids the use of the traditional method of increasing coil power, which is conducive to reducing production costs, reducing product volume, and improving product performance and market competitiveness.

[0037] Combine Figure 3-4 As shown, the main sealing cover 4 includes a movable groove 42 movably connected to one end of the moving iron core 3, and the pressure relief port 41 is arranged at the bottom center of the movable groove 42. A movable gap for gas to pass through is left between the moving iron core 3 and the movable groove 42. In order to ensure that the moving iron core 3 can seal and close the pressure relief port 41, a pressure relief sealing gasket 31 for closing or opening the pressure relief port 41 is provided on one end of the moving iron core 3, wherein one end face of the moving iron core 3 is a circular arc surface structure, and a limiting card groove for positioning and installing the pressure relief sealing gasket 31 is provided in the center of the circular arc surface structure. The limiting card groove plays a limiting role in the pressure relief sealing gasket at one end of the moving iron core, and the installation stability is good.

[0038] The limiting sleeve 6 is fixed to the moving iron core 3 by a retaining ring. The top of the main sealing cover 4 is provided with a step structure 45 that cooperates with the limiting sleeve 6, and the bottom is provided with a main sealing gasket 44 that seals with the main valve port 11. In this embodiment, the main sealing gasket 44 and the pressure relief sealing gasket 31 are respectively made of rubber materials. The limiting sleeve 6 is abutted against the step structure 45 under the action of the spring force of the closing spring 5, and the spring force of the closing spring 5 acts on the main sealing cover 4, thereby ensuring that the moving iron core drives the main sealing cover to have sufficiently stable closing pressure when closing the main valve port.

[0039] The following combination Figure 3-4 The specific setting method of the limit structure is described in detail:

[0040] The limiting structure 7 includes an annular groove arranged on the side wall of the movable groove 42, a limiting clamp ring 71 arranged in the annular groove, and an annular limiting protrusion 72 formed on the outer peripheral side wall of one end of the moving iron core 3. The limiting clamp ring 71 partially extends into the movable groove 42 and is located on the upper side of the annular limiting protrusion 72, so that when the moving iron core 3 moves upward relative to the main sealing cover 4, the annular limiting protrusion 72 is driven to cooperate with the limiting clamp ring 71 to resist each other, wherein, a ring-shaped giving groove 73 is formed on the side wall of the moving iron core 3 and is located on the upper side of the annular limiting protrusion 72, and the limiting clamp ring 71 is accommodated between the annular groove and the giving groove 73. According to the above structure, it can be seen that when the moving iron core 3 rises a certain distance relative to the main sealing cover 4, it will drive the annular limiting protrusion 72 to come into contact with the limiting clamping ring 71. The limiting cooperation formed by the cooperation between the annular limiting protrusion 72 and the limiting clamping ring 71 can not only prevent one end of the moving iron core 3 from escaping from the movable groove 42 during the upward movement, but also form a linkage cooperation between the moving iron core 3 and the main sealing cover 4. When the moving iron core rises and contacts the limiting clamping ring, the main sealing cover is driven to move synchronously to open the main valve port. The structural setting is simple and the cooperation is reliable.

[0041] Since there is a movable gap between the moving iron core 3 and the movable groove 42, in order to increase the air intake flow between the two and leading to the pressure relief port 41, two air passing planes 32 are formed on the edge of the annular limiting protrusion 72, and a gap is formed between the air passing plane 32 and the side wall of the movable groove 42. This design of the air passing plane 32 can increase the air intake volume between the moving iron core 3 and the movable groove 42, which is beneficial to improving the pressure relief flow when the pressure relief port 41 is opened, and the pressure reduction speed is fast, thereby helping to quickly open the main valve port after the pressure is reduced.

[0042] like Figure 3 As shown, an annular convex tip structure 43 protruding into the movable groove 42 is provided at the upper end of the pressure relief port 41, and the pressure relief sealing gasket 31 cooperates and abuts against the convex tip structure 43. The design of this annular convex tip structure 43 is conducive to reducing the contact area between the pressure relief sealing gasket 31 and the pressure relief port 41, and the contact pressure is small, thereby improving the starting performance of the moving iron core 3 to drive the pressure relief sealing gasket to open the pressure relief port 41, and the opening speed is fast.

[0043] In this embodiment, if Figure 1-2As shown, a static tube housing 8 suitable for accommodating the movable iron core 3 is disposed within the central cavity of the drive coil 2. The movable iron core 3 is reciprocating within the static tube housing 8 along its axial direction. The axial direction of the static tube housing 8 is aligned with the axial direction of the main valve port 11. The opening distance between the valve core assembly and the main valve port 11 is determined by the travel of the movable iron core 3. To this end, an axially movable flow control screw 9 is provided through the static tube housing 8. The flow control screw 9 is disposed opposite the other end of the movable iron core 3. This flow control screw 9 is threadedly connected to the static tube housing 8. When rotated, it can move toward or away from the movable iron core 3 along the axial direction of the static tube housing. This allows the travel clearance between the flow control screw and the movable iron core to be adjusted, thereby reducing or increasing the upward travel distance of the movable iron core, thereby achieving the purpose of adjusting the opening distance of the valve core assembly and controlling the flow rate of the main valve port.

[0044] It is further preferred that a motion guide structure is provided between the flow regulating screw 9 and the moving iron core 3, and the motion guide structure includes a guide hole 91 provided on the flow regulating screw 9 along the axial extension of the static pipe sleeve 8, and a motion guide rod 92 connected to the other end of the moving iron core 3, and the motion guide rod 92 is slidably connected to the guide hole 91. The advantage of this design is that the motion guide rod 92 plays a motion guiding role for the moving iron core 3, thereby improving the stability and reliability of the reciprocating movement of the moving iron core 3 between the static pipe sleeve and the main valve port, so that the main sealing cover on one end of the moving iron core remains opposite to the main valve port, ensuring that the main sealing cover can be accurately and tightly closed at the main valve port, thereby ensuring that the product operation is more reliable.

[0045] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A solenoid valve device with a reduced pressure and quick start, comprising a valve body (1) and a driving coil (2) and a valve core assembly arranged on the valve body, wherein the valve body (1) comprises a main valve port (11) corresponding to the valve core assembly and arranged between an air inlet chamber (12) and an air outlet chamber (13), a closing spring (5) is arranged between the valve core assembly and the valve body (1) to apply force to the valve core assembly to move toward one side of the main valve port (11), the valve core assembly comprises a moving iron core (3) that moves up and down along the axial direction of the main valve port, and a main sealing cover (4) arranged at one end of the moving iron core (3) for closing the main valve port (11), characterized in that: A limiting sleeve (6) is fixedly provided on the movable iron core (3) and is limited to the lower end of the closing spring (5). The upper end of the closing spring is abutted against the groove of the valve body. The limiting sleeve (6) cooperates and presses against the main sealing cover (4). The movable iron core (3) and the main sealing cover (4) can be relatively moved by a certain distance. The main sealing cover (4) is provided with a pressure relief port (41) for connecting the air inlet chamber (12) and the main valve port (11). The movable iron core (3) is opened and closed under the action of the closing spring. The pressure relief port (41) is sealed and pressed, and a limiting structure (7) is provided between the movable iron core (3) and the main sealing cover (4) to form a limiting fit after the two move relative to each other for a certain distance; when the movable iron core (3) is driven by the driving coil (2) to move upward, it has a pressure relief stage in which it drives the limiting sleeve (6) to move away from the main sealing cover (4) to open the pressure relief port (41), and an opening stage in which the main sealing cover (4) is driven upward by the limiting structure to open the main valve port (11); The main sealing cover (4) includes a movable groove (42) movably connected to one end of the movable iron core (3), and the limiting structure includes an annular limiting protrusion (72) formed on the outer peripheral side wall of one end of the movable iron core (3), and at least one air-transmitting plane (32) is formed on the edge of the annular limiting protrusion (72), and a gap is formed between the air-transmitting plane (32) and the side wall of the movable groove (42).

2. The solenoid valve device with pressure reduction and quick start according to claim 1, characterized in that: The pressure relief port (41) is arranged at the bottom center of the movable groove (42), and a pressure relief sealing gasket (31) for closing or opening the pressure relief port (41) is arranged on one end of the movable iron core (3).

3. The solenoid valve device with pressure reduction and quick start according to claim 2, characterized in that: The limiting structure (7) further comprises an annular groove arranged on the side wall of the movable groove (42), and a limiting collar (71) arranged in the annular groove. The limiting collar (71) partially extends into the movable groove (42) and is located on the upper side of the annular limiting protrusion (72), so that when the movable iron core (3) moves upward relative to the main sealing cover (4), the annular limiting protrusion (72) is driven to cooperate with the limiting collar (71) to abut against each other.

4. The solenoid valve device with pressure reduction and quick start according to claim 3, characterized in that: A ring-shaped relief groove (73) is formed on the side wall of the movable iron core (3) and is located on the upper side of the annular limiting protrusion (72). The limiting collar (71) is accommodated between the annular groove and the relief groove (73).

5. The solenoid valve device for rapid start-up with reduced pressure according to any one of claims 2 to 4, characterized in that: One end surface of the moving iron core (3) is an arc surface structure, and a limiting slot for positioning and installing the pressure relief sealing gasket (31) is provided at the center of the arc surface structure.

6. The solenoid valve device with pressure reduction and quick start according to claim 5, characterized in that: An annular convex tip structure (43) protruding into the movable groove (42) is provided at the upper end of the pressure relief port (41), and the pressure relief sealing gasket (31) is fitted and abutted against the convex tip structure (43).

7. The solenoid valve device with pressure reduction and quick start according to claim 6, characterized in that: The limiting sleeve (6) is fixed to the moving iron core (3) via a retaining ring; the top of the main sealing cover (4) is provided with a step structure (45) that cooperates with the limiting sleeve (6) and abuts against it; the bottom of the main sealing cover (4) is provided with a main sealing gasket (44) that seals with the main valve port (11).

8. The solenoid valve device with pressure reduction and quick start according to claim 1, characterized in that: A static tube sleeve (8) suitable for accommodating the moving iron core (3) is provided in the central cavity of the driving coil (2), so that the moving iron core (3) can be movably arranged in the static tube sleeve (8), and a flow regulating screw (9) movable along its axial direction is passed through the static tube sleeve (8), and the flow regulating screw (9) is arranged opposite to the other end of the moving iron core (3).

9. The solenoid valve device with pressure reduction and quick start according to claim 8, characterized in that: A motion guide structure is provided between the flow regulating screw (9) and the moving iron core (3), the motion guide structure comprising a guide hole (91) provided on the flow regulating screw (9) along the axial extension of the static pipe sleeve (8), and a motion guide rod (92) connected to the other end of the moving iron core (3), the motion guide rod (92) being slidably connected to the guide hole (91).

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