Digital flow valve

Abstract

The utility model discloses a digital flow valve, including the valve body, be provided with the pressure reducing valve body on the valve body, be provided with the oil inlet line and the oil outlet line between the pressure reducing valve body and the valve body, set up the pressure reducing valve core through the left pressure reducing valve bush in the oil inlet line, the end of pressure reducing valve bush is provided with the bung, the right -hand member of pressure reducing valve core is provided with the pressure reducing spring, be provided with the oil discharge line in the valve body, set up the throttle valve core through the throttle valve bush on the oil discharge line, the outer end of throttle valve bush is provided with the throttle valve spring through the throttle valve gland, the rear end of throttle valve core is provided with the transmission screw through the transmission nut, be provided with the step motor through the bracket on the valve body, be provided with the oil inlet on the pressure reducing valve body and communicate the oil inlet line, be provided with the oil outlet and the oil discharge on the valve body and communicate the oil outlet line and the oil discharge line respectively. The utility model guarantees the stability of oil inlet line pressure, still guarantees the stability of oil outlet line pressure, and then guarantees the oil discharge of oil outlet.

Description

Technical Field

[0001] This utility model relates to the field of control valve technology, and more specifically to a digital flow valve. Background Technology

[0002] In the fields of industrial automation, hydraulic transmission, and fluid control, flow valves, as core actuators, directly impact system performance through their control accuracy, response speed, and reliability. Traditional flow valves often rely on mechanical throttle valves and proportional valves for regulation, adjusting flow rate by changing the valve opening. This results in low regulation accuracy and slow response speed, making it difficult to meet the demands of high-dynamic operating conditions. Furthermore, the mechanical structure is susceptible to wear and temperature drift, leading to insufficient stability. Analog signal control relies on complex feedback systems, and its dynamic response is insufficient for high-speed, high-frequency scenarios. Although existing electro-hydraulic servo valves have improved accuracy to ±1%, they still suffer from complex structures and high maintenance costs. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a digital flow valve to solve the problems in the background art.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows.

[0005] A digital flow valve includes a valve body with a pressure-reducing valve body mounted on it. An inlet and outlet pipeline for supplying hydraulic oil are connected between the pressure-reducing valve body and the valve body. A pressure-reducing valve core is mounted inside the inlet pipeline via a pressure-reducing valve sleeve on the left side. A plug is provided at the end of the pressure-reducing valve sleeve, and a pressure-reducing spring is provided at the right end of the pressure-reducing valve core for support. The valve body also includes a return pipeline connected to the inlet and outlet pipelines for discharging excess hydraulic oil generated in the return pipeline. The oil pipeline and the unloading pipeline are equipped with a throttle valve core through a throttle valve sleeve. The outer end of the throttle valve sleeve is equipped with a throttle valve spring for supporting the throttle valve core through a throttle valve gland. The rear end of the throttle valve core is equipped with a transmission screw through a transmission nut. The valve body is equipped with a stepper motor for driving the transmission screw to rotate through a bracket. The pressure reducing valve body is equipped with an oil inlet that connects to the oil inlet pipeline, and an oil outlet and an unloading port that connect to the oil outlet pipeline and the unloading pipeline, respectively.

[0006] The technical solution is further optimized. The pressure-reducing spring includes an outer pressure-reducing spring and an inner pressure-reducing spring, which are mounted on the end of the pressure-reducing valve core via a support. The outer pressure-reducing spring is sleeved on the inner pressure-reducing spring.

[0007] To further optimize the technical solution, a pressure-reducing valve right end cap is provided on the outer side of the support.

[0008] To further optimize the technical solution, a high-pressure damping nozzle is provided between the plug and the pressure reducing valve core, facing the pressure reducing valve core.

[0009] To further optimize the technical solution, the left end caps for sealing the plug and the throttle valve cover are respectively provided on the left side of the pressure reducing valve body and the valve body.

[0010] To further optimize the technical solution, a Glyd ring gland is provided between the bracket and the stepper motor to improve the sealing performance of the valve body.

[0011] The technological advancements achieved by this utility model are as follows, due to the adoption of the above technical solutions.

[0012] The digital flow valve provided by this utility model has an oil discharge pipeline installed in the valve body. When there is too much hydraulic oil in the inlet pipeline, it flows out through the oil discharge pipeline, which not only ensures the stability of the pressure in the inlet pipeline, but also ensures the stability of the pressure in the outlet pipeline, thereby ensuring the output of oil at the outlet. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the external structure of this utility model; Figure 3 This is the left view of the present invention; Figure 4 This is a schematic diagram of the present invention.

[0014] The components are: 1. Valve body, 2. Left end cover, 3. Throttling valve gland, 4. Throttling valve spring, 5. Throttling valve sleeve, 6. Throttling valve core, 7. Drive screw, 8. Drive nut, 9. Bracket, 10. Stepper motor, 11. Glyd ring gland, 12. Pressure reducing valve body, 13. Plug, 14. Pressure reducing valve sleeve, 15. High pressure damping nozzle, 16. Pressure reducing valve core, 17. External pressure reducing spring, 18. Internal pressure reducing spring, 19. Support, 20. Right end cover of pressure reducing valve, M. Stepper motor, P. Oil inlet, A. Oil outlet, L. Oil discharge port. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] Digital flow valve, combined with Figures 1 to 3 As shown, the device includes a valve body 1, on which a pressure reducing valve body 12 is mounted. An oil inlet pipe and an oil outlet pipe are provided between the pressure reducing valve body 12 and the valve body 1 for the flow of hydraulic oil. A pressure reducing valve core 16 is mounted in the oil inlet pipe through a pressure reducing valve sleeve 14 on the left side. A plug 13 is provided at the end of the pressure reducing valve sleeve 14. A high-pressure damping nozzle 15 is provided between the plug 13 and the pressure reducing valve core 16, with the high-pressure damping nozzle 15 facing the pressure reducing valve core 16. A pressure reducing spring is provided at the right end of the pressure reducing valve core 16 to support the pressure reducing valve core.

[0017] The pressure-reducing spring includes an outer pressure-reducing spring 17 and an inner pressure-reducing spring 18, which are mounted on the end of the pressure-reducing valve core 16 via a support 19. The outer pressure-reducing spring is sleeved on the inner pressure-reducing spring, and a right end cap 20 of the pressure-reducing valve is provided on the outside of the support 19.

[0018] The valve body 1 is equipped with an oil discharge line, which is connected to the return line between the inlet and outlet lines to discharge excess hydraulic oil generated in the return line. A throttle valve core 6 is mounted on the oil discharge line via a throttle valve sleeve 5. A throttle valve spring 4 is mounted on the outer end of the throttle valve sleeve 5 via a throttle valve cover 3, supporting the throttle valve core 6. A transmission screw 7 is mounted on the rear end of the throttle valve core 6 via a transmission nut 8. A stepper motor 10 is mounted on the valve body 1 via a bracket 9. The motor shaft of the stepper motor is connected to the transmission screw 7 to drive the screw to rotate. A Glyd ring cover 11 is positioned between the bracket 9 and the stepper motor 10 to improve the sealing performance of the valve body.

[0019] Left end caps 2 are provided on the left side of the pressure reducing valve body 12 and the valve body 1, respectively used to seal the corresponding side plugs 13 and throttle valve caps 3.

[0020] The pressure reducing valve body 12 is provided with an oil inlet P, which is connected to the oil inlet pipeline. The valve body 1 is provided with an oil outlet A and an oil discharge port L, which are connected to the oil outlet pipeline and the oil discharge port L are connected to the oil discharge pipeline.

[0021] The working principle diagram of this utility model is as follows: Figure 4 As shown, hydraulic oil enters from the inlet P and exits from the outlet A. The stepper motor M drives the transmission screw to rotate, which in turn moves the transmission nut back and forth. The transmission nut pushes the pilot valve core to move back and forth to a set position, opening a certain gap between the unloading pipeline and the inlet pipeline. When there is a lot of hydraulic oil in the return pipeline between the inlet and outlet pipelines, the hydraulic oil in the return pipeline flows into the unloading pipeline and is discharged through the unloading port L, maintaining a stable oil output at the outlet.

Claims

1. A digital flow valve, characterized in that: The system includes a valve body (1), on which a pressure-reducing valve body (12) is provided. An inlet pipe and an outlet pipe for supplying hydraulic oil are provided between the pressure-reducing valve body (12) and the valve body (1). A pressure-reducing valve core (16) is provided in the inlet pipe via a pressure-reducing valve sleeve (14) on the left side. A plug (13) is provided at the end of the pressure-reducing valve sleeve (14), and a pressure-reducing spring for supporting the pressure-reducing valve core (16) is provided at the right end. The valve body (1) also includes an unloading pipe connected to a return pipe between the inlet and outlet pipes for discharging excess hydraulic oil generated in the return pipe. A throttle valve core (6) is provided on the oil pipeline via a throttle valve sleeve (5). A throttle valve spring (4) for supporting the throttle valve core (6) is provided on the outer end of the throttle valve sleeve (5) via a throttle valve cover (3). A transmission screw (7) is provided on the rear end of the throttle valve core (6) via a transmission nut (8). A stepper motor (10) for driving the transmission screw to rotate is provided on the valve body (1) via a bracket (9). An oil inlet connected to the oil inlet pipeline is provided on the pressure reducing valve body (12). An oil outlet and an oil discharge port connected to the oil outlet pipeline and the oil discharge pipeline, respectively, are provided on the valve body (1).

2. The digital flow valve according to claim 1, characterized in that: The pressure-reducing spring includes an outer pressure-reducing spring (17) and an inner pressure-reducing spring (18) disposed at the end of the pressure-reducing valve core (16) via a support (19), with the outer pressure-reducing spring sleeved on the inner pressure-reducing spring.

3. The digital flow valve according to claim 2, characterized in that: The support (19) is provided with a pressure reducing valve right end cap (20) on its outer side.

4. The digital flow valve according to claim 1, characterized in that: A high-pressure damping nozzle (15) is provided between the plug (13) and the pressure reducing valve core (16) and faces the pressure reducing valve core (16).

5. The digital flow valve according to claim 1, characterized in that: The left side of the pressure reducing valve body (12) and the valve body (1) are respectively provided with left end caps (2) for sealing the plug cap (13) and the throttle valve cap (3).

6. The digital flow valve according to claim 1, characterized in that: A Glyd ring gland (11) for improving the sealing performance of the valve body is provided between the bracket (9) and the stepper motor (10).

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