Dynamic pressure equalization for a proportional valve

Abstract

The utility model relates to proportional valve technical field especially is a kind of dynamic pressure balancing device of proportional valve, including proportional valve main body, the inside installation of proportional valve main body has adjusting assembly, and the one end screw joint of adjusting assembly has adjusting drive component, and the side of proportional valve main body rear end is fixed with adjusting box through penetration;Adjusting assembly includes valve core pusher, and the rear end fixed connection of valve core pusher has connecting seat, and the inside fixed mounting of connecting seat has pressure detector, and the detection end fixed connection of pressure detector has support spring, and the rear end fixed connection spring adjusting seat of support spring, and the inboard fixed connection of spring adjusting seat has screw rod seat, and the lower portion of spring adjusting seat is equipped with positioning groove, in the utility model, avoid the cumbersome of traditional disassembly replacement spring, reduce maintenance cost and time, reduce the damage caused by improper disassembly, guarantee the control accuracy and working stability of proportional valve.

Description

Technical Field

[0001] This utility model relates to the field of proportional valve technology, specifically to a dynamic pressure balancing device for a proportional valve. Background Technology

[0002] A proportional control valve is a hydraulic or pneumatic control valve that enables the output hydraulic parameters (pressure, flow, and direction) to change proportionally with the input electrical signal parameters (current and voltage), thereby achieving continuous proportional control. It combines the advantages of on / off electro-hydraulic control elements and servo electro-hydraulic control elements. It can be used for open-loop control or to form closed-loop control by adding a feedback loop. It has good static performance and dynamic performance that can meet the requirements of general industrial control.

[0003] Hydraulic proportional control valves typically consist of three parts: an electromechanical converter, a hydraulic amplifier (pilot valve and power stage main valve), and a detection feedback mechanism (single-stage valves do not have a pilot valve). The electromechanical converter is generally a proportional electromagnet that receives analog electrical signals and converts them into mechanical force, which pushes the valve core to move. The change in the position of the valve core changes the opening of the valve port, thereby regulating the flow and pressure of the hydraulic oil. When the input signal is larger, the magnetic force generated by the electromagnet is stronger, and the distance that pushes the valve core to move is greater, and the output flow or pressure increases accordingly. Conversely, when the input signal decreases, the valve core resets, and the flow or pressure decreases accordingly. In this way, precise control of the hydraulic system is achieved.

[0004] However, during the operation of a proportional valve, the valve core relies on an internal spring for elastic support to ensure dynamic pressure balance. However, after prolonged use, the elasticity of the spring inevitably decays, resulting in a decrease in elastic support force. This leads to errors in the dynamic pressure balance of the valve core, affecting the control accuracy and operational stability of the proportional valve. In existing technologies, when the problem of spring elasticity decay needs to be addressed, the proportional valve often needs to be completely disassembled to replace the support spring. This process is time-consuming and laborious, increasing maintenance costs and time. Furthermore, improper disassembly or installation may damage other components of the proportional valve, affecting the overall service life and performance of the equipment. Therefore, a dynamic pressure balancing device for proportional valves is proposed to address the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a dynamic pressure balancing device for a proportional valve to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A dynamic pressure balancing device for a proportional valve includes a proportional valve body. An adjusting assembly is installed inside the proportional valve body. One end of the adjusting assembly is screwed to an adjusting drive assembly. An adjusting box is fixedly fixed to one side of the rear end of the proportional valve body. The adjusting assembly includes a valve core pusher. A connecting seat is fixedly connected to the rear end of the valve core pusher. A pressure detector is fixedly installed inside the connecting seat. A support spring is fixedly connected to the detection end of the pressure detector. A spring adjusting seat is fixedly connected to the rear end of the support spring. A screw seat is fixedly connected to the inner side of the spring adjusting seat. A positioning groove is provided below the adjusting seat. A position indicator is elastically connected to the center of the inner side of the positioning groove via a spring. An observation rail mechanism is installed below the positioning groove. The adjusting drive assembly includes a fixed seat. A transmission screw is rotatably connected to the inner side of the fixed seat. A driven large gear is fixedly connected to the rear end of the transmission screw. An installation frame is installed on one side of the driven large gear. A spring telescopic rod is fixedly connected to the front end of the installation frame. A connecting frame is fixedly connected to the telescopic end of the spring telescopic rod. A driving small gear is rotatably connected inside the connecting frame. The transmission screw is helically connected to the screw seat.

[0008] As a further optimization of this utility model, the fixed seat is fixedly installed at the rear end of the inner side of the proportional valve body, the center of the fixed seat and the center of the proportional valve body are located on the same central axis, and the fixed seat is located in front of the driven large gear.

[0009] As a further optimization of this utility model, the front end of the transmission screw extends into the interior of the support spring, the rear end of the transmission screw extends behind the screw seat, and the center of the transmission screw and the center of the driven large gear are located on the same central axis.

[0010] As a further optimization of this utility model, the mounting frame is fixedly installed inside the adjustment box on the side near the driven large gear, the interior of the mounting frame is a hollow structure, and the spring telescopic rod is located in the corner area of ​​the front end face of the mounting frame.

[0011] As a further optimization of this utility model, the shape of the connecting frame is adapted to the shape of the driving pinion, the connecting frame is slidably disposed on the inner wall of the adjusting box, the driving pinion extends into the interior of the mounting frame, and the driving pinion meshes with the driven large gear.

[0012] As a further optimization of this utility model, the observation rail mechanism includes an observation rail body, which is fixedly installed at the bottom of the inner side of the proportional valve body. The observation rail body and the proportional valve body are parallel to each other. The observation rail body is slidably connected to the positioning groove and the connecting seat respectively. The interior of the observation rail body is a cavity structure. The upper end face of the observation rail body is provided with linearly arranged indicator holes. The diameter of the indicator holes is adapted to the diameter of the position indicator. A slanted reflector is fixedly connected to the bottom of the inner side of the observation rail body. The slanted reflector is located below the indicator holes, and the upper end face of the slanted reflector is inclined.

[0013] As a further optimization of this utility model, the following features are provided: a display is fixedly connected to the top of the proportional valve body; an inlet pipe is fixedly connected to one side of the proportional valve body; an outlet pipe is fixedly connected to the other side of the proportional valve body; the outlet pipe is connected to the inlet pipe through the proportional valve body; a proportional electromagnet is fixedly connected to the front end of the adjustment drive assembly; and the center of the proportional electromagnet and the center of the valve core pusher are located on the same central axis.

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

[0015] In this invention, the adjustable components, adjustable drive components, and observation rail mechanism enable flexible adjustment of the support spring's elasticity. When the spring's elasticity diminishes, there is no need to completely disassemble the proportional valve. Simply operate the active pinion and driven large gear to mesh, and rotate the active pinion to adjust the position of the spring adjusting seat, thereby adjusting the support spring's elasticity. Simultaneously, the observation rail mechanism, through a position indicator and a beveled reflector, facilitates the operator's judgment of the spring adjusting seat's position, aiding in precise adjustment. This design avoids the tediousness of traditional spring disassembly and replacement, reduces maintenance costs and time, minimizes damage caused by improper disassembly, ensures the proportional valve's control accuracy and operational stability, and extends the equipment's service life. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the entire utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the adjustment component of this utility model;

[0019] Figure 4 This is a schematic diagram of the valve core actuation structure of this utility model;

[0020] Figure 5 This is an exploded structural diagram of the spring adjusting seat of this utility model;

[0021] Figure 6 This is a cross-sectional structural diagram of the observation track mechanism of this utility model;

[0022] Figure 7 This is a schematic diagram of the structure of the adjustment drive component of this utility model.

[0023] In the diagram: 1. Proportional valve body;

[0024] 2. Adjustment assembly; 21. Valve core pusher; 22. Connecting seat; 23. Pressure detector; 24. Support spring; 25. Spring adjusting seat; 26. Screw seat; 27. Positioning groove; 28. Position indicator;

[0025] 29. Observation rail mechanism; 291. Observation rail body; 292. Indicator hole; 293. Angled reflector;

[0026] 3. Adjustment drive assembly; 31. Fixed base; 32. Transmission screw; 33. Driven large gear; 34. Mounting frame; 35. Spring telescopic rod; 36. Connecting frame; 37. Driving small gear;

[0027] 4. Adjustment box; 5. Display; 6. Inlet pipe; 7. Outlet pipe; 8. Proportional electromagnet. Detailed Implementation

[0028] 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.

[0029] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0030] Please see Figures 1-7 This utility model provides a technical solution:

[0031] A dynamic pressure balancing device for a proportional valve includes a proportional valve body 1. An adjusting assembly 2 is installed inside the proportional valve body 1. One end of the adjusting assembly 2 is screwed to an adjusting drive assembly 3. An adjusting box 4 is fixedly fixed to one side of the rear end of the proportional valve body 1. The adjusting assembly 2 includes a valve core pusher 21. A connecting seat 22 is fixedly connected to the rear end of the valve core pusher 21. A pressure detector 23 is fixedly installed inside the connecting seat 22. A support spring 24 is fixedly connected to the detection end of the pressure detector 23. A spring adjusting seat 25 is fixedly connected to the rear end of the support spring 24. A screw seat 26 is fixedly connected to the inner side of the spring adjusting seat 25. A positioning groove 27 is formed below the spring adjusting seat 25. A position is elastically connected to the middle of the inner side of the positioning groove 27 by a spring. The indicator 28 and the positioning groove 27 are equipped with an observation rail mechanism 29. The adjustment drive assembly 3 includes a fixed base 31, a transmission screw 32 is rotatably connected to the inner side of the fixed base 31, a driven large gear 33 is fixedly connected to the rear end of the transmission screw 32, a mounting frame 34 is installed on one side of the driven large gear 33, the mounting frame 34 is fixedly set inside the adjustment box 4 near the driven large gear 33, the interior of the mounting frame 34 is a hollow structure, the spring telescopic rod 35 is located in the corner area of ​​the front end face of the mounting frame 34, the front end face of the mounting frame 34 is fixedly connected to the spring telescopic rod 35, the telescopic end of the spring telescopic rod 35 is fixedly connected to the connecting frame 36, and the interior of the connecting frame 36 is rotatably connected to the driving small gear 37. The transmission screw 32 is screwed to the screw seat 26.

[0032] As a further implementation of this solution, the observation rail mechanism 29 includes an observation rail body 291, which is fixedly installed at the bottom of the inner side of the proportional valve body 1. The observation rail body 291 is parallel to the proportional valve body 1. The observation rail body 291 is slidably connected to the positioning groove 27 and the connecting seat 22, respectively. The interior of the observation rail body 291 is a hollow structure. The upper end face of the observation rail body 291 has linearly arranged indicator holes 292, the diameter of which is adapted to the diameter of the position indicator 28. An inclined reflector 293 is fixedly connected to the bottom of the inner side of the observation rail body 291. The inclined reflector 293 is located below the indicator holes 292. The upper surface of the 3 is inclined. This design allows the observation rail body 291 to provide stable track support for the movement of the spring adjustment seat 25. When the spring adjustment seat 25 moves, the position indicator 28 moves synchronously through the spring. The position indicator 28 extends into the indicator hole 292 under the influence of the spring. The inclined structure of the inclined reflector 293 can clearly transmit the position information of the position indicator 28 to the operator through reflection. The operator can observe the image reflected by the inclined reflector 293 from the rear end of the observation rail body 291, thereby accurately understanding the position of the position indicator 28, and thus facilitating the judgment of the position of the spring adjustment seat 25, providing powerful assistance for precise adjustment.

[0033] As a further implementation of this solution, the fixed seat 31 is fixedly installed at the rear end of the inner side of the proportional valve body 1. The center of the fixed seat 31 and the center of the proportional valve body 1 are located on the same central axis. The fixed seat 31 is located in front of the driven large gear 33. This arrangement ensures that the transmission screw 32 can maintain good coaxiality during rotation, making the transmission more stable and reliable. It provides a stable support point for the transmission screw 32, ensuring the stability of the transmission connection between the driven large gear 33 and the transmission screw 32, thereby enabling the adjustment drive assembly 3 to work normally and efficiently.

[0034] As a further implementation of this solution, the front end of the transmission screw 32 extends into the interior of the support spring 24, and the rear end of the transmission screw 32 extends into the rear of the screw seat 26. The center of the transmission screw 32 and the center of the driven large gear 33 are located on the same central axis, which ensures that the force transmission is more uniform during the transmission process, avoids the extra torque caused by eccentricity, and improves the adjustment accuracy and stability.

[0035] As a further implementation of this solution, the shape of the connecting frame 36 is adapted to the shape of the driving pinion 37. The connecting frame 36 is slidably disposed on the inner wall of the adjusting box 4. The driving pinion 37 extends into the interior of the mounting frame 34. The driving pinion 37 meshes with the driven large gear 33. The small diameter of the driving pinion 37 drives the large diameter of the driven large gear 33, resulting in a slow rotation speed of the driven large gear 33. The accuracy of adjustment is improved through the transmission between the driving pinion 37 and the driven large gear 33.

[0036] As a further implementation of this solution, a display 5 is fixedly connected to the top of the proportional valve body 1. An inlet pipe 6 is fixedly connected through one side of the proportional valve body 1, and an outlet pipe 7 is fixedly connected through the other side of the proportional valve body 1. The outlet pipe 7 is connected to the inlet pipe 6 through the proportional valve body 1. The arrangement of the inlet pipe 6 and the outlet pipe 7 realizes the input and output of liquid, ensuring the normal operation of the proportional valve. A proportional electromagnet 8 is fixedly connected to the front end of the adjustment drive component 3. The center of the proportional electromagnet 8 and the center of the valve core pusher 21 are located on the same central axis. The alignment of the central axis of the proportional electromagnet 8 and the valve core pusher 21 allows the force generated by the proportional electromagnet 8 to be accurately transmitted to the valve core pusher 21, thereby achieving precise control of the valve core and ensuring the adjustment effect of dynamic pressure balance of the proportional valve.

[0037] Work process: When the proportional valve body 1 is working, the support spring 24 acts on the detection end of the pressure detector 23. The pressure detector 23 converts the pressure signal into an electrical signal and displays the pressure value on the display 5 in real time through electrical connection. The operator can judge the elastic support state of the spring based on this. When the pressure value on the display 5 is abnormal, it is judged that the elasticity of the support spring 24 has decayed and needs to be adjusted. Adjustment operation is then performed.

[0038] In its natural state, the elasticity of the spring telescopic rod 35 separates the driving pinion 37 from the driven large gear 33, preventing misoperation. When adjustment is needed, the driving pinion 37 is first pressed inward, causing it to move the connecting frame 36 closer to the mounting frame 34. Simultaneously, the telescopic end of the spring telescopic rod 35 retracts, meshing the driving pinion 37 with the driven large gear 33 and rotating the driving pinion 37. Utilizing the transmission method where the smaller diameter of the driving pinion 37 drives the larger diameter of the driven large gear 33, the driven large gear 33 rotates at a slower speed, improving adjustment accuracy. The rotation of the driven large gear 33 drives the transmission screw 32, which is fixedly connected to it, to rotate synchronously. Since the transmission screw 32 is threadedly connected to the screw seat 26, the rotating transmission screw 32 causes the spring adjustment seat 25 to move along the path of the observation rail mechanism 29, thereby compressing the front support spring 24 and achieving flexible adjustment of the elasticity of the support spring 24. During this process...

[0039] When the spring adjusting seat 25 moves, the position indicator 28 moves synchronously via the spring. The position indicator 28 extends into the indicator hole 292 under the action of the spring. At the same time, because the observation rail body 291 is equipped with an inclined reflector 293, the operator can observe the image reflected by the inclined reflector 293 from the rear end of the observation rail body 291 to understand the position of the position indicator 28, thereby facilitating the determination of the position of the spring adjusting seat 25 and assisting in the precise adjustment. After the adjustment is completed, the pressure on the driving pinion 37 is released. Under the elastic force of the spring telescopic rod 35, the connecting frame 36 drives the driving pinion 37 to reset. The driving pinion 37 separates from the driven large gear 33, and the device returns to the normal working waiting state. The pressure can continue to be monitored through the display 5 to ensure the dynamic pressure balance of the proportional valve.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dynamic pressure balancing device for a proportional valve, comprising a proportional valve body (1), characterized in that: An adjustment component (2) is installed inside the proportional valve body (1). One end of the adjustment component (2) is screwed to an adjustment drive component (3). An adjustment box (4) is fixed through one side of the rear end of the proportional valve body (1). The adjustment assembly (2) includes a valve core pusher (21), a connecting seat (22) is fixedly connected to the rear end of the valve core pusher (21), a pressure detector (23) is fixedly installed inside the connecting seat (22), a support spring (24) is fixedly connected to the detection end of the pressure detector (23), a spring adjustment seat (25) is fixedly connected to the rear end of the support spring (24), a screw seat (26) is fixedly connected to the inner side of the spring adjustment seat (25), a positioning groove (27) is provided below the spring adjustment seat (25), a position indicator (28) is elastically connected to the middle of the inner side of the positioning groove (27) by a spring, and an observation rail mechanism (29) is installed below the positioning groove (27). The adjustment drive assembly (3) includes a fixed base (31), a transmission screw (32) is rotatably connected to the inner side of the fixed base (31), a driven large gear (33) is fixedly connected to the rear end of the transmission screw (32), an installation frame (34) is installed on one side of the driven large gear (33), a spring telescopic rod (35) is fixedly connected to the front end of the installation frame (34), a connecting frame (36) is fixedly connected to the telescopic end of the spring telescopic rod (35), and a driving small gear (37) is rotatably connected inside the connecting frame (36). The transmission screw (32) is helically connected to the screw seat (26).

2. The dynamic pressure balancing device for a proportional valve according to claim 1, characterized in that: The fixed seat (31) is fixedly installed at the rear end of the inner side of the proportional valve body (1). The center of the fixed seat (31) and the center of the proportional valve body (1) are located on the same central axis. The fixed seat (31) is located in front of the driven large gear (33).

3. The dynamic pressure balancing device for a proportional valve according to claim 1, characterized in that: The front end of the transmission screw (32) extends into the interior of the support spring (24), and the rear end of the transmission screw (32) extends behind the screw seat (26). The center of the transmission screw (32) and the center of the driven gear (33) are located on the same central axis.

4. The dynamic pressure balancing device for a proportional valve according to claim 1, characterized in that: The mounting frame (34) is fixedly installed inside the adjusting box (4) on the side close to the driven large gear (33). The interior of the mounting frame (34) is a cavity structure, and the spring telescopic rod (35) is located in the corner area of ​​the front end face of the mounting frame (34).

5. The dynamic pressure balancing device for a proportional valve according to claim 1, characterized in that: The shape of the connecting frame (36) is adapted to the shape of the driving pinion (37). The connecting frame (36) is slidably disposed on the inner wall of the adjusting box (4). The driving pinion (37) extends into the interior of the mounting frame (34). The driving pinion (37) meshes with the driven large gear (33).

6. The dynamic pressure balancing device for a proportional valve according to claim 1, characterized in that: The observation rail mechanism (29) includes an observation rail body (291), which is fixedly installed at the bottom of the inner side of the proportional valve body (1). The observation rail body (291) is parallel to the proportional valve body (1). The observation rail body (291) is slidably connected to the positioning groove (27) and the connecting seat (22) respectively. The interior of the observation rail body (291) is a cavity structure. The upper end face of the observation rail body (291) is provided with linearly arranged indicator holes (292). The diameter of the indicator holes (292) is adapted to the diameter of the position indicator (28). The bottom of the inner side of the observation rail body (291) is fixedly connected to a slanted reflector (293). The slanted reflector (293) is located below the indicator holes (292). The upper end face of the slanted reflector (293) is inclined.

7. The dynamic pressure balancing device for a proportional valve according to claim 1, characterized in that: A display (5) is fixedly connected to the top of the proportional valve body (1). An inlet pipe (6) is fixedly connected to one side of the proportional valve body (1), and an outlet pipe (7) is fixedly connected to the other side of the proportional valve body (1). The outlet pipe (7) is connected to the inlet pipe (6) through the proportional valve body (1). A proportional electromagnet (8) is fixedly connected to the front end of the adjustment drive assembly (3). The center of the proportional electromagnet (8) and the center of the valve core pusher (21) are located on the same central axis.

Images