Pilot-stage double-coil high-speed switch integrated module for electric-gas proportional valve

Abstract

The utility model discloses a pilot-level double-coil high-speed switch integrated module for an electric-gas proportional valve, which relates to the field of high-speed switch valves and comprises a left coil unit, a right coil unit and a valve body. The coil unit is composed of a coil, a fixed iron core, a spring and a movable iron core. An air inlet, a working port and an exhaust port are arranged at the bottom of the valve body, an air inlet control hole is arranged on the left side of the valve body, and an exhaust control hole is arranged on the right side. According to the electric-gas proportional valve, the gas path volume of the pilot level of the electric-gas proportional valve is well reduced, the response speed of the pilot level of the electric-gas proportional valve is increased, and meanwhile pressure fluctuation of the pilot level of the electric-gas proportional valve is reduced.

Description

Technical Field

[0001] This utility model relates to the field of high-speed switching valves, and in particular to a high-speed switching valve suitable for electro-pneumatic proportional valves, belonging to the field of pneumatic transmission technology. Background Technology

[0002] A high-speed switching valve is a type of valve that controls the flow of gas through rapid opening and closing actions. Its core characteristic is its millisecond-level response speed, making it suitable for applications requiring high-frequency switching. Structurally, it typically employs electromagnetic actuation, features a lightweight valve core design, and is made of materials that can withstand high pressure, high temperature, and corrosive fluids.

[0003] An electro-pneumatic proportional valve with a high-speed switching valve uses pulse width modulation (PWM) technology to drive a high-speed solenoid valve to open and close rapidly, indirectly controlling the pilot chamber pressure of the electro-pneumatic proportional valve, thereby adjusting the displacement of the main valve core and achieving continuous proportional output of flow or pressure. Generally, an electro-pneumatic proportional valve has a supply high-speed switching valve and an exhaust high-speed switching valve. The supply high-speed switching valve is used to control the connection between the input air pressure and the pilot chamber, and the exhaust high-speed switching valve is used to control the exhaust of the pilot chamber. When the output air pressure is less than the set value, the supply high-speed switching valve opens, and the input air pressure enters the pilot chamber of the electro-pneumatic proportional valve, pushing the main valve core downward. When the output air pressure is greater than the set value, the exhaust high-speed switching valve opens, the gas in the pilot chamber of the electro-pneumatic proportional valve is discharged, and the main valve core moves upward.

[0004] In the control loop, the volume of the pipeline has a significant impact on the dynamic characteristics and stability of the system. A larger pipeline volume will lengthen the gas flow path, resulting in delays in pneumatic signal transmission, reducing the real-time performance of closed-loop control, and potentially causing overshoot or oscillation. At the same time, the compressibility of gas in long pipelines will exacerbate pressure fluctuations, distort sensor feedback signals, and affect the controller's precise adjustment of valves. Summary of the Invention

[0005] The purpose of this invention is to provide a dual-coil high-speed switching integrated module for the pilot stage of an electro-pneumatic proportional valve, which optimizes the air path volume between the supply high-speed switching valve and the exhaust high-speed switching valve of the existing electro-pneumatic proportional valve, improves the response speed of the pilot stage of the electro-pneumatic proportional valve, and reduces the pressure fluctuation of the pilot stage of the electro-pneumatic proportional valve. The technical solution provided by this utility model is as follows: a dual-coil high-speed switching integrated module for the pilot stage of an electro-pneumatic proportional valve, comprising a right coil (1), a first fixed iron core (2), a first spring (3), a first moving iron core (4), a valve body (5), a second moving iron core (6), a second spring (7), a second fixed iron core (8), and a left coil (9). The valve body (5) has a first sealing ring (502) on each of its left and right end faces, which directly seals against the end faces of the left coil (9) and the right coil (1); the valve body (5) has two positioning holes (501) on each of its left and right end faces, which respectively cooperate with two positioning pins (101) of the left coil (9) and the right coil (1); the first fixed iron core (2) and the second fixed iron core (8) are respectively fitted with a second sealing ring (201) and a third sealing ring (801). The iron core (2) is embedded in the center hole of the right coil (1), and the second fixed iron core (8) is embedded in the center hole of the left coil (9); the first spring (3) is located between the first fixed iron core (2) and the first moving iron core (4), and the second spring (7) is located between the second moving iron core (6) and the second fixed iron core (8); the bottom of the valve body (5) is provided with an air inlet P, a working port A and an exhaust port T, the air inlet P is connected to the working port A through the air inlet control hole (503), and the working port A is connected to the exhaust port T through the exhaust control hole (504); the second moving iron core (6) opens or closes the air inlet control hole (503) by axial movement to control the connection and disconnection between the air inlet P and the working port A; the first moving iron core (4) opens or closes the exhaust control hole (504) by axial movement to control the connection and disconnection between the working port A and the exhaust port T.

[0006] The positioning holes 501 at both ends of the valve body 5 are diagonally distributed.

[0007] The first sealing ring 502, the second sealing ring 201 and the third sealing ring 801 are O-rings.

[0008] The beneficial effects of this utility model are as follows: Combining the structural dimensions and working conditions of the electro-pneumatic proportional valve, this utility model provides a dual-coil high-speed switching integrated module for the pilot stage of the electro-pneumatic proportional valve. Through integrated design, the air passage volume from the working port to the pilot chamber of the electro-pneumatic proportional valve is reduced, the response speed of the pilot chamber is improved, and the pressure feedback delay is reduced. Attached Figure Description

[0009] Figure 1 This is a three-dimensional exploded view of the present invention.

[0010] Figure 2 This is a three-dimensional schematic diagram of the present invention.

[0011] Figure 3 This is a cross-sectional view of the present invention.

[0012] The following are the labels in the diagram: 1. Right coil; 2. First fixed iron core; 3. First spring; 4. First moving iron core; 5. Valve body; 6. Second moving iron core; 7. Second spring; 8. Second fixed iron core; 9. Left coil; 101. Positioning pin; 201. Second sealing ring; 501. Positioning hole; 502. First sealing ring; 503. Air inlet control hole; 504. Air outlet control hole; 505. Screw; 506. Connector; 801. Third sealing ring. Detailed Implementation

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

[0014] Example:

[0015] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, in the embodiments of this utility model are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0016] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] See Figure 1 This utility model provides a dual-coil high-speed switching integrated module for the pilot stage of an electro-pneumatic proportional valve, including a right coil (1), a first fixed iron core (2), a first spring (3), a first moving iron core (4), a valve body (5), a second moving iron core (6), a second spring (7), a second fixed iron core (8), and a left coil (9). The first fixed iron core (2) is embedded in the center hole of the right coil (1), the first spring (3) is placed in the center hole of the right coil (1) and contacts one end face of the first fixed iron core (2), and the first moving iron core (4) is located in the center hole of the right coil (1); the right end face of the valve body (5) is fitted and sealed to the left end face of the right coil (1). The second fixed iron core (8) is embedded in the center hole of the left coil (9), the second spring (7) is placed in the center hole of the left coil (9) and contacts one end face of the second fixed iron core (8), and the second moving iron core (6) is located in the center hole of the left coil (9). Among them, the first moving iron core (4) belongs to the right coil unit and is used to control exhaust; the second moving iron core (6) belongs to the left coil unit and is used to control air intake; see reference Figure 2 The right coil (1) and left coil (9) are fixedly connected to the valve body (5) via connectors (506), and the valve body (5) is connected to the external base via screws (505); see reference Figure 3 The valve body (5) has an air inlet P, a working port A, and an exhaust port T at its bottom. The air inlet control hole (503) is used to control the connection between the air inlet P and the working port A, and the exhaust control hole (504) is used to control the connection between the working port A and the exhaust port T. This design connects the working port A directly to the pilot chamber of the electro-pneumatic proportional valve, which significantly shortens the air path length and reduces the volume.

[0018] Working principle: This invention provides a dual-coil high-speed switching integrated module for the pilot stage of an electro-pneumatic proportional valve. (See reference...) Figure 3Based on the structural dimensions and working conditions of the electro-pneumatic proportional valve, when the output pressure is less than the set value, the left coil (9) is energized and attracts the second moving iron core (6). The air source enters the working port A from the air inlet P through the air inlet control hole (503). The air source enters the pilot chamber and pushes the main valve core downward. When the output pressure is greater than the set value, the right coil (1) is energized and attracts the first moving iron core (4). The working port A is connected to the exhaust port T through the exhaust control hole (504). The gas in the pilot chamber is discharged and the main valve core moves upward. When the input pressure is equal to the set value, the left and right coils are de-energized, the first moving iron core (4) and the second moving iron core (6) are reset, and the pilot chamber maintains the current opening.

[0019] The above embodiments are merely illustrative of the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made based on the substance of the content of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A double-coil high-speed switch integrated module for the pilot stage of an electro-pneumatic proportional valve, comprising a right coil (1), a first fixed core (2), a first spring (3), a first moving core (4), a valve body (5), a second moving core (6), a second spring (7), a second fixed core (8), and a left coil (9), characterized in that: the valve body (5) is provided with a first sealing ring (502) at each of its left and right end faces, and directly seals against the end faces of the left coil (9) and the right coil (1); the valve body (5) is provided with two positioning holes (501) at each of its left and right ends, which cooperate with two positioning pins (101) of the left coil (9) and the right coil (1); the first fixed core (2) and the second fixed core (8) are respectively provided with a second sealing ring (201) and a third sealing ring (801), and the first fixed core (2) and the second fixed core (8) are respectively embedded in the center holes of the right coil (1) and the left coil (9); the first spring (3) is located between the first fixed core (2) and the first moving core (4), and the second spring (7) is located between the second moving core (6) and the second fixed core (8); the valve body (5) is provided with an air inlet port P, a working port A, and an air outlet port T at its bottom, the air inlet port P is communicated with the working port A through an air inlet control hole (503), and the working port A is communicated with the air outlet port T through an air outlet control hole (504); the second moving core (6) opens or closes the air inlet control hole (503) through axial movement to control the on-off of the air inlet port P and the working port A; and the first moving core (4) opens or closes the air outlet control hole (504) through axial movement to control the on-off of the working port A and the air outlet port T. The positioning holes (501) at the left and right ends of the valve body (5) are diagonally distributed. The first sealing ring (502), the second sealing ring (201), and the third sealing ring (801) are O-shaped sealing rings. ​ ​ ​ ​ 2. The dual coil high speed switching integrated module of claim 1, wherein: ​ 3. The dual coil high speed switching integrated module of claim 1, wherein: ​

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