Novel pressure-resistant PID proportional regulating valve suitable for membrane filtration system

Abstract

The utility model belongs to novel pressure -resisting PID proportional regulating valve technical field, concretely is novel pressure -resisting PID proportional regulating valve suitable for membrane filtration system, including valve pipe, is fixedly installed with installation cover on valve pipe, is provided with valve plug and valve stem respectively in valve pipe, is provided with round plate no.

Description

Technical Field

[0001] This utility model belongs to the technical field of novel pressure-resistant PID proportional control valves, specifically a novel pressure-resistant PID proportional control valve suitable for membrane filtration systems. Background Technology

[0002] A PID control valve is an industrial process control instrument primarily used for fluid parameter regulation in industries such as petroleum, chemical, power, metallurgy, and textile printing and dyeing. Its core features include compact structure, high reliability, maintenance-free operation, and the ability to adapt to high flow rate requirements via programmable flow characteristic curves.

[0003] While existing control valves have regulating functions, their pressure limits are usually fixed, making it inconvenient to adjust them according to specific usage conditions. This necessitates the use of control valves with different pressure limits under different operating conditions, increasing costs. Summary of the Invention

[0004] The purpose of this invention is to provide a novel pressure-resistant PID proportional control valve suitable for membrane filtration systems. This valve has the function of conveniently adjusting the pressure limit of the PID proportional control valve, thereby improving its applicability in membrane filtration systems.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a novel pressure-resistant PID proportional regulating valve suitable for membrane filtration systems is provided, including a valve tube, an installation cover fixedly installed on the valve tube, a valve plug and a valve stem respectively disposed inside the valve tube, a circular plate one, a circular plate two, a buffer spring, a displacement sensor and an expansion water bag respectively disposed inside the installation cover, the buffer spring being fixedly connected between the circular plate one and the circular plate two, the displacement sensor being fixedly installed on the inner wall of the installation cover, and the measuring end of the displacement sensor being fixedly connected to the circular plate two, the expansion water bag being disposed below the circular plate two, and both ends of the expansion water bag being fixedly connected to connecting pipes, the other ends of the two connecting pipes being fixedly connected to a drain pipe and an inlet pipe respectively; A pressure relief box is fixedly connected to the upper end of the inlet pipe of the valve pipe. A pressure relief block is slidably arranged inside the pressure relief box. A drain pipe and an inlet pipe are fixedly connected to the upper and lower ends of the pressure relief box, respectively. The other end of the drain pipe is fixedly connected to the inlet pipe. A guide rod is fixedly connected to one end of the pressure relief block. A guide cylinder is fixedly connected to one side of the pressure relief box. A guide cover is fixedly connected to the other end of the guide cylinder. An adjusting plate is rotatably connected inside the guide cover. Multiple mounting slots are opened in the adjusting plate. A top rod is slidably connected in each of the multiple mounting slots. A pressure spring is fixedly connected between the top rod and the inner wall of the mounting slot.

[0006] Optionally, the lower end of the valve stem passes through the bottom plate of the mounting cover and is fixedly connected to the upper end of the valve plug, and an actuator is fixedly installed on the upper end of the mounting cover.

[0007] Optionally, the buffer spring is movably sleeved on the outer end of the valve stem, and both the first circular plate and the second circular plate are slidably sleeved on the outer wall of the valve stem. The first circular plate is pressed against the top plate of the mounting cover, and the second circular plate is pressed against the expansion water bag.

[0008] Optionally, the end of the drain pipe away from the connecting pipe is fixedly connected to the outlet pipe of the valve pipe, and the outlet of the drain pipe is connected to the outlet pipe of the valve pipe, and the lower end of the inlet pipe is connected to the inlet pipe of the valve pipe.

[0009] Optionally, an extension plate is fixedly connected to one side of the pressure relief box, a protective box is fixedly connected to the extension plate, a servo motor is fixedly installed inside the protective box, and the output end of the servo motor is fixedly connected to the adjustment plate.

[0010] Optionally, the pressure relief block is slidably fitted against the inner wall of the pressure relief box, and the end of the top rod near the guide rod is made of a hemispherical structure.

[0011] Optionally, a baffle is fixedly installed inside the pressure relief box, and the baffle is located above the opening of the water inlet pipe near the side.

[0012] Compared with the prior art, the present invention has the following beneficial effects: This invention uses a servo motor to drive the adjustment disc to rotate, which allows for easy switching between pressure springs with different elastic coefficients to extend the corresponding top rods and apply different pressures to the guide rods, thereby adjusting the pressure relief block's pressure resistance and achieving the function of adjusting the pressure limit.

[0013] This invention, by setting up a circular plate 1, a circular plate 2, a buffer spring, an expansion water bag, and a connecting pipe structure inside the mounting cover, allows liquid entering the drain pipe to enter the connecting pipe through the inlet pipe after the pressure relief block is opened. The liquid then enters the expansion water bag, causing it to expand and lift the circular plate 2. A displacement sensor installed inside the mounting cover detects the rise of the circular plate 2. When a preset value is reached, the valve opening can be adjusted as needed by a PID controller. This allows the PID controller to proportionally adjust the valve opening according to different pressure resistance coefficients, making it more convenient to use. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1This is a schematic diagram of the main structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the valve pipe when the pressure relief block of this utility model is closed; Figure 3 for Figure 2 Enlarged structural diagram at point A; Figure 4 This is a schematic diagram of the internal structure of the valve pipe in the open state of the pressure relief block of this utility model; Figure 5 This is a schematic diagram of the internal structure of the adjustment disc of this utility model.

[0016] In the diagram: 1. Valve pipe; 2. Valve plug; 3. Valve stem; 4. Mounting cover; 5. Circular plate one; 6. Circular plate two; 7. Buffer spring; 8. Displacement sensor; 9. Expansion water bag; 10. Connecting pipe; 11. Drain pipe; 12. Inlet pipe; 13. Pressure relief box; 14. Drain pipe; 15. Water inlet pipe; 16. Pressure relief block; 17. Baffle; 18. Guide rod; 19. Extension plate; 20. Protective box; 21. Servo motor; 22. Guide cover; 23. Adjusting plate; 24. Mounting groove; 25. Top rod; 26. Pressure spring; 27. Guide cylinder; 28. Actuator. Detailed Implementation

[0017] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0018] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0019] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" 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.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] Reference Figure 1-5 The present invention will now be described. A novel pressure-resistant PID proportional control valve suitable for membrane filtration systems includes a valve pipe 1, a mounting cover 4 fixedly installed on the valve pipe 1, a valve plug 2 and a valve stem 3 respectively disposed inside the valve pipe 1, and a circular plate 5, a circular plate 6, a buffer spring 7, a displacement sensor 8 and an expansion water bag 9 respectively disposed inside the mounting cover 4. The buffer spring 7 is fixedly connected between the circular plate 5 and the circular plate 6. The displacement sensor 8 is fixedly installed on the inner wall of the mounting cover 4, and the measuring end of the displacement sensor 8 is fixedly connected to the circular plate 6. The expansion water bag 9 is disposed below the circular plate 6, and both ends of the expansion water bag 9 are fixedly connected to connecting pipes 10. The other ends of the two connecting pipes 10 are respectively fixedly connected to a drain pipe 11 and an inlet pipe 12.

[0022] A pressure relief box 13 is fixedly connected to the upper end of the inlet pipe of valve pipe 1. A pressure relief block 16 is slidably arranged inside the pressure relief box 13. A drain pipe 14 and an inlet pipe 15 are fixedly connected to the upper and lower ends of the pressure relief box 13, respectively. The other end of the drain pipe 14 is fixedly connected to the inlet pipe 12. A guide rod 18 is fixedly connected to one end of the pressure relief block 16. A guide cylinder 27 is fixedly connected to one side of the pressure relief box 13. A guide cover 22 is fixedly connected to the other end of the guide cylinder 27. An adjusting plate 23 is rotatably connected inside the guide cover 22. Multiple mounting slots 24 are opened inside the adjusting plate 23. A top rod 25 is slidably connected inside each of the multiple mounting slots 24. A pressure spring 26 is fixedly connected between the top rod 25 and the inner wall of the mounting slot 24.

[0023] Compared with the prior art, this utility model can effectively adjust the pressure resistance limit of the valve by switching the pressure springs 26 with different elastic coefficients to apply different pressures to the pressure relief block 16, so that it can be applied to different working conditions.

[0024] Please refer to another embodiment of this utility model as well. Figure 1 , Figure 2 and Figure 4The lower end of valve stem 3 passes through the bottom plate of mounting cover 4 and is fixedly connected to the upper end of valve plug 2. An actuator 28 is fixedly installed on the upper end of mounting cover 4. The specific working principle of actuator 28 and PID controller is based on existing technology of PID control valves, therefore it will not be described in detail here. Buffer spring 7 is movably sleeved on the outer end of valve stem 3. Circular plate 1 5 and circular plate 2 6 are both slidably sleeved on the outer wall of valve stem 3. Circular plate 1 5 presses against the top plate of mounting cover 4, and circular plate 2 6 presses against the expansion water bag 9. Circular plate 2 6 can... The valve stem 3 is stably displaced up and down. The end of the drain pipe 11 away from the connecting pipe 10 is fixedly connected to the outlet pipe of the valve pipe 1, and the outlet of the drain pipe 11 is connected to the outlet pipe of the valve pipe 1. The lower end of the inlet pipe 15 is connected to the inlet pipe of the valve pipe 1. The end of the drain pipe 11 away from the connecting pipe 10 is fixedly connected to the outlet pipe of the valve pipe 1, and the outlet of the drain pipe 11 is connected to the outlet pipe of the valve pipe 1. The lower end of the inlet pipe 15 is connected to the inlet pipe of the valve pipe 1.

[0025] In another embodiment of this utility model, please refer to Figure 3 and Figure 5 An extension plate 19 is fixedly connected to one side of the pressure relief box 13. A protective box 20 is fixedly connected to the extension plate 19. A servo motor 21 is fixedly installed inside the protective box 20. The output end of the servo motor 21 is fixedly connected to the adjustment plate 23. The servo motor 21 controls the rotation of the adjustment plate 23. The pressure relief block 16 is slidably fitted against the inner wall of the pressure relief box 13. The end of the top rod 25 near the guide rod 18 is made of a hemispherical structure. The spherical structure ensures that after the top rod 25 is pushed into the guide cover 22 by the guide rod 18, the adjustment plate 23 will not be unable to rotate due to the top rod 25 and the guide cover 22 getting stuck. A baffle 17 is fixedly installed inside the pressure relief box 13. The baffle 17 is located above the opening of the water inlet pipe 15 near the side. Due to the position of the baffle 17, the pressure relief block 16 will not completely block the upper opening of the water inlet pipe 15, thus preventing liquid from entering the pressure relief box 13.

[0026] In summary, when the pressure relief block 16 is fully open, the actuator 28 drives the valve plug 2 to rise through the valve stem 3, controlling the valve opening. At the same time, the servo motor 21 drives the regulating disc 23 to rotate, switching to the pressure spring 26 with greater elasticity. This process is repeated, and each time a different pressure spring 26 is switched, the valve opening can be controlled accordingly as the pressure relief block 16 is fully opened or closed again, achieving a better adjustment effect.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel pressure-resistant PID proportional control valve suitable for membrane filtration systems, comprising a valve tube (1), a mounting cover (4) fixedly installed on the valve tube (1), and a valve plug (2) and a valve stem (3) respectively disposed inside the valve tube (1), characterized in that: The mounting cover (4) is provided with a circular plate one (5), a circular plate two (6), a buffer spring (7), a displacement sensor (8) and an expansion water bag (9). The buffer spring (7) is fixedly connected between the circular plate one (5) and the circular plate two (6). The displacement sensor (8) is fixedly installed on the inner wall of the mounting cover (4), and the measuring end of the displacement sensor (8) is fixedly connected to the circular plate two (6). The expansion water bag (9) is located below the circular plate two (6), and both ends of the expansion water bag (9) are fixedly connected to connecting pipes (10). The other ends of the two connecting pipes (10) are fixedly connected to a drain pipe (11) and an inlet pipe (12) respectively. A pressure relief box (13) is fixedly connected to the upper end of the inlet pipe of the valve pipe (1). A pressure relief block (16) is slidably arranged inside the pressure relief box (13). A drain pipe (14) and an inlet pipe (15) are fixedly connected to the upper and lower ends of the pressure relief box (13), respectively. The other end of the drain pipe (14) is fixedly connected to the liquid inlet pipe (12). A guide rod (18) is fixedly connected to one end of the pressure relief block (16). A guide cylinder (27) is fixedly connected to one side of the pressure relief box (13). A guide cover (22) is fixedly connected to the other end of the guide cylinder (27). An adjusting plate (23) is rotatably connected inside the guide cover (22). Multiple mounting slots (24) are opened inside the adjusting plate (23). A top rod (25) is slidably connected inside each of the multiple mounting slots (24). A pressure spring (26) is fixedly connected between the top rod (25) and the inner wall of the mounting slot (24).

2. The novel pressure-resistant PID proportional control valve for membrane filtration systems as described in claim 1, characterized in that: The lower end of the valve stem (3) passes through the bottom plate of the mounting cover (4) and is fixedly connected to the upper end of the valve plug (2). An actuator (28) is fixedly installed on the upper end of the mounting cover (4).

3. The novel pressure-resistant PID proportional control valve for membrane filtration systems as described in claim 1, characterized in that: The buffer spring (7) is movably sleeved on the outer end of the valve stem (3). The first circular plate (5) and the second circular plate (6) are both slidably sleeved on the outer wall of the valve stem (3). The first circular plate (5) is pressed against the top plate of the mounting cover (4), and the second circular plate (6) is pressed against the expansion water bag (9).

4. The novel pressure-resistant PID proportional control valve for membrane filtration systems as described in claim 1, characterized in that: The end of the drain pipe (11) away from the connecting pipe (10) is fixedly connected to the outlet pipe of the valve pipe (1), and the outlet of the drain pipe (11) is connected to the outlet pipe of the valve pipe (1). The lower end of the inlet pipe (15) is connected to the inlet pipe of the valve pipe (1).

5. The novel pressure-resistant PID proportional control valve for membrane filtration systems as described in claim 1, characterized in that: An extension plate (19) is fixedly connected to one side of the pressure relief box (13), and a protective box (20) is fixedly connected to the extension plate (19). A servo motor (21) is fixedly installed inside the protective box (20), and the output end of the servo motor (21) is fixedly connected to the adjustment plate (23).

6. The novel pressure-resistant PID proportional control valve for membrane filtration systems as described in claim 1, characterized in that: The pressure relief block (16) is slidably fitted against the inner wall of the pressure relief box (13), and the top rod (25) is made of a hemispherical structure at one end near the guide rod (18).

7. The novel pressure-resistant PID proportional control valve for membrane filtration systems as described in claim 1, characterized in that: A baffle (17) is fixedly installed inside the pressure relief box (13). The baffle (17) is located above the opening of the water inlet pipe (15) near the side.

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