Stepping electric pilot valve

Abstract

The utility model relates to the technical field of pilot valves, in particular to a stepping electric pilot valve which comprises an upper valve body, a lower valve body, a diaphragm, a valve seat, a spring seat, a pressure adjusting spring, a spring pressing plate, a guide rod, a threaded lead screw, a coupler, a speed reducer, a mounting plate, a stepping motor, a supporting rod, a top plate, a valve element, a bottom valve cover, an outer shell, a top cover and a wiring pipeline. When the pressure adjusting device is used, the stepping motor is controlled to rotate forwards or backwards, rotating force is transmitted to the threaded lead screw through the speed reducer to drive the threaded lead screw to rotate, the threaded lead screw rotates to enable the spring pressing plate connected to the threaded lead screw in a threaded mode to move upwards or downwards, and when force is applied to the pressure adjusting spring through the spring pressing plate, the pressure adjusting spring can move upwards or downwards. The pilot valve is controlled through circuit control, the operation convenience is greatly improved, manual on-site operation is not needed, fine adjustment of motor operation is more accurate, the flow control precision is high, and good practicability is achieved.

Description

Technical Field

[0001] This utility model relates to the field of pilot valve technology, specifically to a stepper electric pilot valve. Background Technology

[0002] A pilot valve is a type of valve used to control fluid flow. It typically consists of a small valve or piston. The pilot valve operates the main valve by adjusting the pressure of the fluid, thereby controlling the fluid flow. It is widely used in various industrial fields, including automated control systems, hydraulic systems, and pneumatic systems.

[0003] Currently, when using existing pilot valves, it is necessary to manually adjust the pilot valve to regulate the water pressure of the main valve when the valve opening needs to be adjusted. This method of adjustment is inconvenient, and the fine adjustments made manually are not accurate enough, resulting in low flow regulation control precision.

[0004] Based on this, the present invention designs a stepper electric pilot valve to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a stepper electric pilot valve.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a stepper electric pilot valve, comprising an upper valve body, a lower valve body, a diaphragm, a valve seat, a spring seat, a pressure regulating spring, a spring pressure plate, a guide rod, a threaded screw, a coupling, a reducer, a mounting plate, a stepper motor, a support rod, a top plate, a valve core, a bottom valve cover, an outer shell, a top cover, and wiring conduits. The lower valve body is fixedly mounted to the lower end of the upper valve body by bolts. A diaphragm is provided at the connection between the upper and lower valve bodies, and the diaphragm is connected to the upper end of the valve seat. A spring seat is also mounted on the upper end of the valve seat. The diaphragm is disposed between the valve seat and the spring seat. A pressure adjusting spring is connected inside the spring seat. The upper end of the pressure adjusting spring is connected to the spring pressure plate. The spring pressure plate is slidably connected to two guide rods. Both guide rods are fixedly connected to the mounting plate. A threaded screw is helically connected to the center of the spring pressure plate. The upper end of the threaded screw is fixedly connected to a coupling. The upper end of the coupling is fixedly connected to the output end of the reducer. The reducer is fixedly mounted on the mounting plate and is drivenly connected to the output end of the stepper motor.

[0007] In a preferred embodiment of this utility model, the valve seat is disposed inside the cavity of the lower valve body, the lower end of the valve seat is fixedly connected to the valve core, the valve core is movably disposed inside the bottom valve cover, and the bottom valve cover is fixedly installed at the bottom of the lower valve body.

[0008] As a preferred embodiment of this utility model, a second spring is provided at the bottom end of the valve core, one end of the second spring is fixedly connected to the valve core, and the other end is fixedly connected to the bottom valve cover.

[0009] As a preferred embodiment of this utility model, a water passage is provided on one side of the lower valve body, and the outlet of the water passage is located directly above the valve core.

[0010] As a preferred embodiment of this utility model, the upper end of the upper valve body is fixedly connected to the outer shell, and the mounting plate is fixedly installed on the top of the upper valve body by screws.

[0011] As a preferred embodiment of this utility model, the mounting plate is spirally connected to four support rods, the upper ends of the four support rods are fixedly connected to the top plate, and the top plate is located inside the outer shell.

[0012] As a preferred embodiment of this utility model, a top cover is fixedly installed on the top of the outer shell by screws, and a wiring conduit is provided at the center of the top cover.

[0013] As a preferred embodiment of this utility model, the wiring conduit is located inside the top cover, and its terminal is electrically connected to the terminal block of the stepper motor via a connecting wire.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. In use, this utility model controls the forward or reverse rotation of a stepper motor, which transmits the rotational power to a threaded screw via a reducer. The rotation of the threaded screw causes a spring pressure plate threaded onto it to move upward or downward. When the spring pressure plate applies force to the pressure regulating spring, the pressure regulating spring presses the valve seat downward, and simultaneously, the valve core connected to the valve seat is pressed downward into the bottom valve cover to open the water passage. When the spring pressure plate loses its force on the pressure regulating spring, the pressure regulating spring rebounds, and the second spring simultaneously rebounds, pushing the valve core upward to block the water passage, thus achieving the function of adjusting the opening. The pilot valve is controlled by the circuit, greatly improving the convenience of operation. No manual operation is required, and the fine adjustments of the motor operation are more accurate, with high flow control precision, making it highly practical. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the overall front view of the present invention;

[0018] Figure 2 This is a schematic diagram of the overall side view structure of this utility model;

[0019] Figure 3 This is a schematic cross-sectional view of the overall structure of this utility model;

[0020] Figure 4 This is a partial enlarged cross-sectional view of the lower valve body of this utility model;

[0021] Figure 5 This is a partial enlarged cross-sectional view of the upper valve body of this utility model;

[0022] Figure 6 This is a schematic diagram of the internal structure of the pilot valve of this utility model.

[0023] In the diagram: 1. Upper valve body; 2. Lower valve body; 201. Water passage; 3. Diaphragm; 4. Valve seat; 5. Spring seat; 6. Pressure regulating spring; 7. Spring pressure plate; 8. Guide rod; 9. Threaded screw; 10. Coupling; 11. Reducer; 12. Mounting plate; 13. Stepper motor; 14. Support rod; 15. Top plate; 16. Valve core; 1601. Second spring; 17. Bottom valve cover; 18. Outer shell; 19. Top cover; 20. Wiring pipe. Detailed Implementation

[0024] The following will refer to the appendix in the embodiments of this utility model. Figure 1-6 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] Example

[0026] Please see Figure 1-6This utility model provides the following technical solution: a stepper electric pilot valve, including an upper valve body 1, a lower valve body 2, a diaphragm 3, a valve seat 4, a spring seat 5, a pressure regulating spring 6, a spring pressure plate 7, a guide rod 8, a threaded screw 9, a coupling 10, a reducer 11, a mounting plate 12, a stepper motor 13, a support rod 14, a top plate 15, a valve core 16, a bottom valve cover 17, an outer shell 18, a top cover 19, and a wiring conduit 20. The lower valve body 2 is fixedly installed at the lower end of the upper valve body 1 by bolts. A diaphragm 3 is provided at the connection between the upper valve body 1 and the lower valve body 2. The diaphragm 3 is connected to the upper end of the valve seat 4. The upper end of the valve seat 4 also has... A spring seat 5 is installed, and a diaphragm 3 is disposed between the valve seat 4 and the spring seat 5. A pressure regulating spring 6 is connected inside the spring seat 5. The upper end of the pressure regulating spring 6 is connected to the spring pressure plate 7. The spring pressure plate 7 is slidably connected to two guide rods 8. Both guide rods 8 are fixedly connected to the mounting plate 12. A threaded screw 9 is screwed at the center of the spring pressure plate 7. The upper end of the threaded screw 9 is fixedly connected to the coupling 10. The upper end of the coupling 10 is fixedly connected to the output end of the reducer 11. The reducer 11 is fixedly installed on the mounting plate 12. The reducer 11 is drivenly connected to the output end of the stepper motor 13.

[0027] The valve seat 4 is located inside the cavity of the lower valve body 2. The lower end of the valve seat 4 is fixedly connected to the valve core 16. The valve core 16 is movably located inside the bottom valve cover 17. The bottom valve cover 17 is fixedly installed at the bottom of the lower valve body 2.

[0028] A second spring 1601 is provided at the bottom end of the valve core 16. One end of the second spring 1601 is fixedly connected to the valve core 16, and the other end is fixedly connected to the bottom valve cover 17.

[0029] A water passage 201 is provided on one side of the lower valve body 2, and the outlet of the water passage 201 is located directly above the valve core 16.

[0030] The structure consisting of valve seat 4, spring seat 5, pressure regulating spring 6, spring pressure plate 7, guide rod 8, threaded screw 9, coupling 10, reducer 11 and stepper motor 13 can be designed to control the pilot valve opening through remote circuit control of stepper motor 13, thereby achieving higher accuracy in adjusting the pilot valve opening.

[0031] The upper end of the upper valve body 1 is fixedly connected to the outer shell 18, and the mounting plate 12 is fixedly installed on the top of the upper valve body 1 by screws.

[0032] The mounting plate 12 is spirally connected to four support rods 14, the upper ends of which are fixedly connected to the top plate 15, which is located inside the outer casing 18.

[0033] A top cover 19 is fixedly installed on the top of the outer casing 18 by screws, and a wiring conduit 20 is provided at the center of the top cover 19.

[0034] The wiring terminal of the wiring conduit 20, located inside the top cover 19, is electrically connected to the terminal block of the stepper motor 13 via a connecting wire.

[0035] The control circuit can be connected to the wiring pipe 20 provided on the top cover 19, which facilitates remote control of the pilot valve without the need for manual operation, greatly improving the convenience of operation.

[0036] The working principle and usage process of this utility model are as follows: In specific use, by controlling the rotation direction of the stepper motor 13, the rotational power is transmitted to the threaded screw 9 through the reducer 11 and coupling 10, causing the threaded screw 9 to rotate synchronously. The rotation of the threaded screw 9 causes the spring pressure plate 7 threaded to it to move along the guide rod 8. When the spring pressure plate 7 moves downward, it applies pressure to the pressure adjusting spring 6, which transmits pressure to the valve seat 4, pressing the valve seat 4 downward. The downward pressure of the valve seat 4 then presses the valve core 16 connected to the valve seat 4 downward into the bottom valve. The cover 17 is placed inside and the second spring 1601 is compressed, opening the water passage 201. When the stepper motor 13 reverses, the spring plate 7 moves upward and loses pressure on the pressure regulating spring 6. The pressure regulating spring 6 then rebounds, causing the valve seat 4 to lose pressure. At this time, the second spring 1601 rebounds, and under the action of the rebound force, it pushes the valve core 16 upward to block the water passage 201. By controlling the pressure applied by the spring plate 7 to the pressure regulating spring 6, the function of pilot valve opening adjustment control is realized, greatly improving the convenience of operation and making the opening adjustment control more accurate.

[0037] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A stepper electric pilot valve, comprising an upper valve body (1), a lower valve body (2), a diaphragm (3), a valve seat (4), a spring seat (5), a pressure regulating spring (6), a spring pressure plate (7), a guide rod (8), a threaded screw (9), a coupling (10), a reducer (11), a mounting plate (12), a stepper motor (13), a support rod (14), a top plate (15), a valve core (16), a bottom valve cover (17), an outer casing (18), a top cover (19), and wiring conduits (20), characterized in that: The lower valve body (2) is fixedly installed on the lower end of the upper valve body (1) by bolts. A diaphragm (3) is provided at the connection between the upper valve body (1) and the lower valve body (2). The diaphragm (3) is connected to the upper end of the valve seat (4). A spring seat (5) is also installed on the upper end of the valve seat (4). The diaphragm (3) is located between the valve seat (4) and the spring seat (5). A pressure regulating spring (6) is connected inside the spring seat (5). The upper end of the pressure regulating spring (6) is connected to the spring pressure plate (7). The spring pressure plate (7) is slidably connected to two guide rods (8), both of which are fixedly connected to the mounting plate (12). A threaded screw (9) is spirally connected to the center of the spring pressure plate (7). The upper end of the threaded screw (9) is fixedly connected to the coupling (10). The upper end of the coupling (10) is fixedly connected to the output end of the reducer (11). The reducer (11) is fixedly mounted on the mounting plate (12). The reducer (11) is drivenly connected to the output end of the stepper motor (13).

2. The stepper electric pilot valve according to claim 1, characterized in that: The valve seat (4) is located inside the cavity of the lower valve body (2). The lower end of the valve seat (4) is fixedly connected to the valve core (16). The valve core (16) is movably located inside the bottom valve cover (17). The bottom valve cover (17) is fixedly installed at the bottom of the lower valve body (2).

3. The stepper electric pilot valve according to claim 1, characterized in that: The bottom end of the valve core (16) is provided with a second spring (1601), one end of the second spring (1601) is fixedly connected to the valve core (16), and the other end is fixedly connected to the bottom valve cover (17).

4. The stepper electric pilot valve according to claim 1, characterized in that: A water passage (201) is provided on one side of the lower valve body (2), and the outlet of the water passage (201) is located directly above the valve core (16).

5. The stepper electric pilot valve according to claim 1, characterized in that: The upper end of the upper valve body (1) is fixedly connected to the outer shell (18), and the mounting plate (12) is fixedly installed on the top of the upper valve body (1) by screws.

6. The stepper electric pilot valve according to claim 1, characterized in that: The mounting plate (12) is spirally connected to four support rods (14), the upper ends of the four support rods (14) are fixedly connected to the top plate (15), and the top plate (15) is located inside the outer shell (18).

7. The stepper electric pilot valve according to claim 1, characterized in that: The top of the outer casing (18) is fixedly installed with a top cover (19) by screws, and a wiring pipe (20) is provided at the center of the top cover (19).

8. The stepper electric pilot valve according to claim 1, characterized in that: The wiring conduit (20) located inside the top cover (19) has its wiring terminal electrically connected to the terminal block of the stepper motor (13) via a connecting wire.

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