Double-cavity feedback type pressure regulating valve

Abstract

The utility model provides a double-chamber feedback type pressure regulating valve, which relates to the technical field of pressure regulating valves, and comprises a valve body, the top of the valve body is fixedly connected with a valve cover through a bolt, a valve rod is arranged in the valve cover, the bottom of the valve rod is fixedly connected with a balance valve core, a circulation space is arranged in the valve body, and the balance valve core is arranged in the circulation space. The surface of the balance valve element is used in cooperation with the interior of the circulation space. The top of the valve rod is fixedly connected with an actuator, the top of the actuator penetrates through the valve deck and is fixedly connected with a membrane, the surface of the membrane is fixedly connected with a membrane cover, and the bottom of the membrane cover is fixedly connected with the top of the valve deck. By arranging the valve body, the valve cover, the valve rod, the balance valve element, the actuator, the diaphragm, the diaphragm cover, the guide pipe, the pressure regulating box, the first manual ball valve, the water injection structure and the filtering structure, the problems that media are inconvenient to inject and impurities are contained in the media of an existing double-cavity feedback type pressure regulating valve are solved.

Description

Technical Field

[0001] This utility model relates to the field of pressure regulating valve technology, and in particular to a dual-chamber feedback pressure regulating valve. Background Technology

[0002] The dual-chamber feedback pressure regulating valve is a specially designed valve with a dual-chamber structure: the control chamber consists of an upper chamber and a lower chamber, separated by a diaphragm. The lower chamber is isolated from the pipeline pressure. This design ensures that when the valve closes, the pipeline pressure cannot act on the diaphragm, thus significantly reducing the resistance during valve closure. Feedback mechanism: The dual-chamber feedback pressure regulating valve uses a built-in feedback mechanism to monitor and respond to changes in system pressure in real time. When the system pressure is higher than the set value, the valve automatically adjusts to release some of the medium, thereby reducing the pressure; conversely, when the pressure is lower than the set value, the valve closes to reduce the outflow of medium, thus maintaining the system pressure within the set range.

[0003] In existing technologies, real-time pressure control requires the use of dual-chamber feedback pressure regulating valves. However, existing dual-chamber feedback pressure regulating valves have slow injection pipeline connection speeds and poor injection port sealing when injecting media. When the media contains a lot of impurities, it may cause valve blockage or accelerated wear, affecting the valve's working performance. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a dual-chamber feedback pressure regulating valve that facilitates medium injection and impurity filtration, thereby solving the problems of inconvenient medium injection and impurities in existing dual-chamber feedback pressure regulating valves.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a dual-chamber feedback pressure regulating valve, comprising a valve body, a valve cover fixedly connected to the top of the valve body by bolts, a valve stem disposed inside the valve cover, a balance valve core fixedly connected to the bottom of the valve stem, a flow space disposed inside the valve body, and the surface of the balance valve core cooperating with the interior of the flow space.

[0006] An actuator is fixedly connected to the top of the valve stem. The top of the actuator passes through the valve cover and is fixedly connected to a diaphragm. A diaphragm cover is fixedly connected to the surface of the diaphragm, and the bottom of the diaphragm cover is fixedly connected to the top of the valve cover.

[0007] The top of the membrane cover is fixedly connected to a conduit, the other side of the conduit is fixedly connected to a pressure regulating box, the bottom of the pressure regulating box is fixedly connected to a first manual ball valve, and the bottom of the first manual ball valve is fixedly connected to the outlet end of the valve body.

[0008] A water injection structure is provided on the left side of the bottom of the pressure regulating box, and a filter structure is fixedly connected to the right side of the valve body.

[0009] Furthermore, the water injection structure includes a first hollow column located at the bottom inside the pressure regulating box, with the bottom of the first hollow column extending to the bottom of the pressure regulating box. A first threaded sleeve is threaded onto the surface of the first hollow column, and the top of the first threaded sleeve engages with the bottom of the pressure regulating box. A first sealing ring is provided between the first hollow column and the pressure regulating box. A sealing structure is fixedly connected to the top of the inner wall of the first hollow column, and the bottom of the sealing structure contacts and engages with the top of the first hollow column. A retaining structure is also contacted and engaged with the bottom of the sealing structure. A connecting sleeve is fitted onto the surface of the first threaded sleeve, and a second hollow column is fixedly connected inside the connecting sleeve. The bottom of the surface of the second hollow column is threaded, and the surface of the retaining structure is fixedly connected to the inner wall of the second hollow column.

[0010] Furthermore, the sealing structure has a first fixed base, inside which a guide rod is movably connected. A sealing cover is fixedly connected to the top of the guide rod, and the bottom of the sealing cover contacts and engages with the top of the first hollow column. An abutment plate is fixedly connected to the bottom of the guide rod, and the bottom of the abutment plate contacts and engages with the top of the abutment structure.

[0011] Furthermore, the abutting structure includes an abutting rod, the top of which cooperates with the bottom of the abutting plate. A second fixing seat is fixedly connected to the bottom of the abutting rod, the surface of which is fixedly connected to the inner wall of the second hollow column. A reinforcing plate is fixedly connected to the bottom of the surface of the abutting rod, and there are four reinforcing plates, which are evenly distributed.

[0012] Furthermore, the bottom of the sealing cap contacts a second sealing ring for use, the bottom of the second sealing ring is fixedly connected to the top of the first hollow column, a third sealing ring is provided between the top of the first threaded sleeve and the pressure regulating box, and a screw is provided on one side of the connecting sleeve, the threaded end of the screw penetrating the connecting sleeve and extending to the surface of the first threaded sleeve.

[0013] Furthermore, a return spring is sleeved on the bottom of the guide rod surface, and the return spring is located between the first fixed seat and the abutment plate.

[0014] Furthermore, the filter structure includes a connecting pipe located on the right side of the valve body and fixedly connected to the valve body. A filter plate is fixedly connected inside the connecting pipe, and a second manual ball valve is fixedly connected to the bottom of the connecting pipe, the second manual ball valve being located on the right side of the filter plate.

[0015] The beneficial effects of this utility model are:

[0016] 1. This utility model, through the design of a valve body, valve cover, valve stem, balanced valve core, actuator, diaphragm, diaphragm cover, conduit, pressure regulating box, first manual ball valve, water injection structure, and filter structure, effectively controls the flow of the medium by cooperating with the balanced valve core and the flow space, achieving precise flow regulation and improving the stability and reliability of the system. The cooperation between the actuator, diaphragm, and diaphragm cover makes the valve opening and closing operation more flexible and convenient, with a fast response speed, and effectively isolates the medium from the actuator, protecting the actuator from medium corrosion. The connection design between the conduit and the pressure regulating box enables automatic pressure regulation, maintaining stable system pressure and improving system safety and operating efficiency. The first manual ball valve facilitates system maintenance and repair; in case of emergency, the medium flow can be quickly cut off manually to ensure system safety. The addition of the water injection structure allows the system to replenish the medium as needed, maintaining sufficient and stable system media. The filter structure effectively filters impurities in the medium, protecting internal system components from damage and extending the system's service life.

[0017] 2. By setting up a water injection structure, this utility model can significantly improve the sealing and stability of the internal structure of the pressure regulating box. The through-hole design of the first hollow column and the bottom of the pressure regulating box, combined with the cooperation of the first screw sleeve and the first sealing ring, effectively prevents water leakage and ensures precise control of the water injection process. The contact cooperation between the sealing structure and the abutment structure further enhances the sealing effect, avoids the waste of water resources and the corrosion of internal components of the pressure regulating box. The design of the connecting sleeve and the second hollow column not only simplifies the installation process, but also improves the overall stability of the structure, making the water injection structure more durable and reliable.

[0018] 3. By setting up a sealing structure, this utility model can effectively achieve stable lifting and precise positioning of the sealing cover. The movable connection of the guide rod ensures the stability of the sealing cover during movement, avoiding deviation or shaking. The contact and cooperation between the sealing cover and the top of the first hollow column enhances the sealing effect and prevents leakage. The contact and cooperation between the abutment plate and the top of the abutment structure not only provides power support for the lifting and lowering of the sealing cover, but also ensures that the sealing cover stays stably in a specific position, thereby improving the reliability and practicality of the entire sealing structure.

[0019] 4. By setting up an abutment structure, this utility model can significantly improve the stability and durability of the overall structure. The top of the abutment rod and the bottom of the abutment plate work together to ensure accurate transmission of action and improve work efficiency. The second fixing seat fixedly connected to the bottom of the abutment rod, and the fixed connection between the second fixing seat and the inner wall of the second hollow column, enhance the support of the abutment rod and prevent loosening or deformation caused by long-term use. The four reinforcing plates evenly distributed on the bottom surface of the abutment rod enhance the strength and stability of the abutment rod, making the entire structure more robust and durable.

[0020] 5. By setting a second sealing ring, a third sealing ring, and a screw, this utility model can significantly improve the sealing performance of the structure. The second sealing ring used in conjunction with the bottom of the sealing cover ensures a tight connection between the sealing cover and the first hollow column, preventing media leakage. The bottom of the second sealing ring is fixedly connected to the top of the first hollow column, enhancing the stability of the connection. The third sealing ring set between the top of the first threaded sleeve and the pressure regulating box further improves the sealing effect in this area. The screw set on one side of the connecting sleeve penetrates the connecting sleeve through its threaded end and extends to the surface of the first threaded sleeve, which not only achieves the fixation of the connecting sleeve, but also facilitates subsequent disassembly and maintenance.

[0021] 6. By setting a return spring, this utility model can absorb and store energy when the abutment plate moves under the action of external force. At the same time, after the external force is removed, the return spring uses its own elasticity to push the abutment plate to reset, realizing the function of automatic rebound. This improves the stability and reliability of the structure, effectively extends the service life of the equipment, and reduces the inconvenience of operation caused by frequent manual reset.

[0022] 7. This utility model, by setting up a filtration structure, can effectively filter fluids, remove impurities and particulate matter, and improve the purity and quality of the fluids. The fixed connection between the connecting pipe and the valve body ensures the stability and reliability of the structure. The filter plate plays a key filtration role. The setting of the second manual ball valve facilitates the control and maintenance of the filtration structure. When it is necessary to clean the filter plate, it can be done by opening the second manual ball valve. The medium carries the impurities away from the surface of the filter plate and discharges them through the second manual ball valve. Attached Figure Description

[0023] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a cross-sectional view of the pressure regulating box;

[0026] Figure 3 This is a cross-sectional view of the first hollow column;

[0027] Figure 4 This is a three-dimensional diagram of the resistive structure.

[0028] In the diagram: 1. Valve body; 2. Valve cover; 3. Valve stem; 4. Balance valve core; 5. Flow space; 6. Actuator; 7. Diaphragm; 8. Diaphragm cover; 9. Conduit; 10. Pressure regulating box; 11. First manual ball valve; 12. First hollow column; 13. First threaded sleeve; 14. First sealing ring; 15. Connecting sleeve; 16. Second hollow column; 17. First fixed seat; 18. Guide rod; 19. Sealing cover; 20. Abutment plate; 21. Abutment rod; 22. Second fixed seat; 23. Reinforcing plate; 24. Second sealing ring; 25. Third sealing ring; 26. Screw; 27. Return spring; 28. Connecting pipe; 29. ​​Filter plate; 30. Second manual ball valve. Detailed Implementation

[0029] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0030] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of this utility model.

[0031] A dual-chamber feedback pressure regulating valve includes a valve body 1, a valve cover 2 fixedly connected to the top of the valve body 1 by bolts, a valve stem 3 disposed inside the valve cover 2, a balance valve core 4 fixedly connected to the bottom of the valve stem 3, a flow space 5 disposed inside the valve body 1, and the surface of the balance valve core 4 and the interior of the flow space 5 are used in conjunction.

[0032] An actuator 6 is fixedly connected to the top of the valve stem 3. The top of the actuator 6 passes through the valve cover 2 and is fixedly connected to a diaphragm 7. A diaphragm cover 8 is fixedly connected to the surface of the diaphragm 7. The bottom of the diaphragm cover 8 is fixedly connected to the top of the valve cover 2.

[0033] The top of the membrane cover 8 is fixedly connected to the conduit 9, the other side of the conduit 9 is fixedly connected to the pressure regulating box 10, the bottom of the pressure regulating box 10 is fixedly connected to the first manual ball valve 11, and the bottom of the first manual ball valve 11 is fixedly connected to the outlet end of the valve body 1.

[0034] A water injection structure is provided on the left side of the bottom of the pressure regulating box 10, and a filter structure is fixedly connected to the right side of the valve body 1.

[0035] Please see Figure 2 , Figure 3 and Figure 4 , Figure 2 This is a cross-sectional view of the pressure regulating box; Figure 3 This is a cross-sectional view of the first hollow column; Figure 4 This is a three-dimensional diagram of the resistive structure.

[0036] The water injection structure includes a first hollow column 12, located at the bottom of the pressure regulating box 10. The bottom of the first hollow column 12 extends to the bottom of the pressure regulating box 10. A first threaded sleeve 13 is threadedly connected to the surface of the first hollow column 12. The top of the first threaded sleeve 13 engages with the bottom of the pressure regulating box 10. A first sealing ring 14 is provided between the first hollow column 12 and the pressure regulating box 10. A sealing structure is fixedly connected to the top of the inner wall of the first hollow column 12. The bottom of the sealing structure contacts and engages with the top of the first hollow column 12. A stop structure is also contacted and engaged at the bottom of the sealing structure. A connecting sleeve 15 is fitted onto the surface of the first threaded sleeve 13. A second hollow column 16 is fixedly connected inside the connecting sleeve 15. The bottom of the surface of the hollow column 16 is threaded, and the surface of the abutting structure is fixedly connected to the inner wall of the second hollow column 16, which can significantly improve the sealing and stability of the internal structure of the pressure regulating box 10. The through design of the first hollow column 12 and the bottom of the pressure regulating box 10, combined with the cooperation of the first threaded sleeve 13 and the first sealing ring 14, effectively prevents water leakage and ensures precise control of the water injection process. The contact cooperation between the sealing structure and the abutting structure further enhances the sealing effect, avoids the waste of water resources and the corrosion of the internal components of the pressure regulating box 10. The design of the connecting sleeve 15 and the second hollow column 16 not only simplifies the installation process, but also improves the overall stability of the structure, making the water injection structure more durable and reliable.

[0037] The sealing structure includes a first fixed base 17, with a guide rod 18 movably connected inside. A sealing cover 19 is fixedly connected to the top of the guide rod 18, and the bottom of the sealing cover 19 contacts and engages with the top of the first hollow column 12. An abutment plate 20 is fixedly connected to the bottom of the guide rod 18, and the bottom of the abutment plate 20 contacts and engages with the top of the abutment structure. This effectively enables the stable lifting and precise positioning of the sealing cover 19. The movable connection of the guide rod 18 ensures the stability of the sealing cover 19 during movement, preventing deviation or shaking. The contact engagement between the sealing cover 19 and the top of the first hollow column 12 enhances the sealing effect and prevents leakage. The contact engagement between the abutment plate 20 and the top of the abutment structure not only provides power support for the lifting and lowering of the sealing cover 19 but also ensures the stable stopping of the sealing cover 19 in a specific position, thereby improving the reliability and practicality of the entire sealing structure.

[0038] The abutment structure includes an abutment rod 21, the top of which engages with the bottom of an abutment plate 20. A second fixing seat 22 is fixedly connected to the bottom of the abutment rod 21, and the surface of the second fixing seat 22 is fixedly connected to the inner wall of the second hollow column 16. Four reinforcing plates 23 are fixedly connected to the bottom of the surface of the abutment rod 21, and they are evenly distributed, which can significantly improve the stability and durability of the overall structure. The engagement of the top of the abutment rod 21 with the bottom of the abutment plate 20 ensures accurate transmission of the action and improves work efficiency. The fixed connection of the second fixing seat 22 to the bottom of the abutment rod 21 and the fixed connection of the second fixing seat 22 to the inner wall of the second hollow column 16 enhances the support of the abutment rod 21 and prevents loosening or deformation due to long-term use. The four evenly distributed reinforcing plates 23 on the bottom of the surface of the abutment rod 21 enhance the strength and stability of the abutment rod 21, making the entire structure more robust and durable.

[0039] The bottom of the sealing cover 19 contacts and cooperates with the second sealing ring 24. The bottom of the second sealing ring 24 is fixedly connected to the top of the first hollow column 12. A third sealing ring 25 is provided between the top of the first threaded sleeve 13 and the pressure regulating box 10. A screw 26 is provided on one side of the connecting sleeve 15. The threaded end of the screw 26 penetrates the connecting sleeve 15 and extends to the surface of the first threaded sleeve 13, which can significantly improve the sealing performance of the structure. The second sealing ring 24 used at the bottom of the sealing cover 19 ensures a tight connection between the sealing cover 19 and the first hollow column 12, preventing media leakage. The bottom of the second sealing ring 24 is fixedly connected to the top of the first hollow column 12, which enhances the stability of the connection. The third sealing ring 25 provided between the top of the first threaded sleeve 13 and the pressure regulating box 10 further improves the sealing effect in this area. The screw 26 provided on one side of the connecting sleeve 15 penetrates the connecting sleeve 15 through its threaded end and extends to the surface of the first threaded sleeve 13, which not only realizes the fixation of the connecting sleeve 15, but also facilitates subsequent disassembly and maintenance.

[0040] A return spring 27 is sleeved on the bottom of the surface of the guide rod 18. The return spring 27 is located between the first fixed seat 17 and the abutment plate 20. When the abutment plate 20 is moved by an external force, the return spring 27 can absorb and store energy. At the same time, after the external force is removed, it uses its own elasticity to push the abutment plate 20 to reset, realizing the function of automatic rebound. This improves the stability and reliability of the structure, effectively extends the service life of the equipment, and reduces the inconvenience of operation caused by frequent manual reset.

[0041] The filter structure includes a connecting pipe 28, which is located on the right side of the valve body 1 and is fixedly connected to the valve body 1. A filter plate 29 is fixedly connected inside the connecting pipe 28, and a second manual ball valve 30 is fixedly connected to the bottom of the connecting pipe 28. The second manual ball valve 30 is located on the right side of the filter plate 29 and can effectively filter the fluid, remove impurities and particulate matter, and improve the purity and quality of the fluid. The fixed connection between the connecting pipe 28 and the valve body 1 ensures the stability and reliability of the structure. The filter plate 29 plays a key filtering role. The setting of the second manual ball valve 30 facilitates the control and maintenance of the filter structure. When it is necessary to clean the filter plate 29, it can be done by opening the second manual ball valve 30. The medium carries away impurities from the surface of the filter plate 29 and discharges them through the second manual ball valve 30.

[0042] Working principle: When the valve is in operation, fluid is transmitted through the flow space 5 of the valve body 1. Under the action of the valve stem 3, the balance valve core 4 adjusts the size of the flow space 5 according to the command of the actuator 6, thereby achieving flow control of the fluid. The actuator 6 is connected to the conduit 9 through the diaphragm 7 and the diaphragm cover 8. The conduit 9 is further connected to the pressure regulating box 10. The pressure regulating box 10 is connected to the outlet end of the valve body 1 through the first manual ball valve 11, forming a pressure regulating system. When it is necessary to regulate the fluid pressure, the actuator 6 drives the valve stem 3 to move. This, in turn, drives the balance valve core 4 to change the size of the flow space 5. Excess fluid is regulated through the pressure regulating box 10. In the water injection structure, the first hollow column 12 is located inside the pressure regulating box 10 and is connected to the bottom of the pressure regulating box 10 through the first screw sleeve 13. The first sealing ring 14 ensures the sealing of the connection. When water needs to be injected into the pressure regulating box 10, water enters through the first hollow column 12. The sealing structure rises and falls under the action of the abutment structure, controlling the opening and closing of the water injection. The guide rod 18 and the abutment plate 20 ensure the flatness of the sealing structure. For stable movement and precise positioning, the second sealing ring 24 further enhances the sealing effect. The return spring 27 absorbs energy when the abutment plate 20 moves, and pushes the abutment plate 20 back to its original position after the external force is removed, achieving automatic rebound. The abutment structure is connected to the abutment plate 20 through the abutment rod 21. The reinforcing plate 23 enhances the stability and durability of the abutment rod 21. The second fixing seat 22 fixes the abutment rod 21 to the inner wall of the second hollow column 16, ensuring precise transmission of action. The design of the connecting sleeve 15 and the second hollow column 16 simplifies the installation process and improves the structural integrity. To ensure structural stability, screw 26 penetrates the connecting sleeve 15 and extends to the surface of the first threaded sleeve 13, thus fixing the connecting sleeve 15 and facilitating subsequent disassembly and maintenance. In the filter structure, fluid enters through the connecting pipe 28 and is filtered by the filter plate 29 to remove impurities and particulate matter, improving the purity and quality of the fluid. The second manual ball valve 30 facilitates the control and maintenance of the filter structure. When it is necessary to clean the filter plate 29, the second manual ball valve 30 can be opened, and the medium will carry the impurities away from the surface of the filter plate 29 and discharge them.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0044] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A dual-chamber feedback pressure regulating valve, characterized in that: The valve body (1) includes a valve cover (2) which is fixedly connected to the top of the valve body (1) by bolts. A valve stem (3) is provided inside the valve cover (2). A balance valve core (4) is fixedly connected to the bottom of the valve stem (3). A flow space (5) is provided inside the valve body (1). The surface of the balance valve core (4) is used in conjunction with the interior of the flow space (5). An actuator (6) is fixedly connected to the top of the valve stem (3). The top of the actuator (6) passes through the valve cover (2) and is fixedly connected to a diaphragm (7). A diaphragm cover (8) is fixedly connected to the surface of the diaphragm (7). The bottom of the diaphragm cover (8) is fixedly connected to the top of the valve cover (2). The top of the membrane cover (8) is fixedly connected to a conduit (9), the other side of the conduit (9) is fixedly connected to a pressure regulating box (10), the bottom of the pressure regulating box (10) is fixedly connected to a first manual ball valve (11), and the bottom of the first manual ball valve (11) is fixedly connected to the outlet end of the valve body (1). A water injection structure is provided on the left side of the bottom of the pressure regulating box (10), and a filter structure is fixedly connected to the right side of the valve body (1).

2. The dual-chamber feedback pressure regulating valve according to claim 1, characterized in that: The water injection structure includes a first hollow column (12), which is located at the bottom inside the pressure regulating box (10). The bottom of the first hollow column (12) extends through to the bottom of the pressure regulating box (10). A first threaded sleeve (13) is threadedly connected to the surface of the first hollow column (12). The top of the first threaded sleeve (13) is used in conjunction with the bottom of the pressure regulating box (10). A first sealing ring (14) is provided between the first hollow column (12) and the pressure regulating box (10). A sealing structure is fixedly connected to the top of the inner wall of the first hollow column (12). The bottom of the sealing structure is in contact with the top of the first hollow column (12). A retaining structure is in contact with the bottom of the sealing structure. A connecting sleeve (15) is sleeved on the surface of the first threaded sleeve (13). A second hollow column (16) is fixedly connected inside the connecting sleeve (15). A thread is provided on the bottom of the surface of the second hollow column (16). The surface of the retaining structure is fixedly connected to the inner wall of the second hollow column (16).

3. The dual-chamber feedback pressure regulating valve according to claim 2, characterized in that: The sealing structure has a first fixed seat (17), and a guide rod (18) is movably connected inside the first fixed seat (17). A sealing cover (19) is fixedly connected to the top of the guide rod (18). The bottom of the sealing cover (19) is in contact with the top of the first hollow column (12). An abutment plate (20) is fixedly connected to the bottom of the guide rod (18). The bottom of the abutment plate (20) is in contact with the top of the abutment structure.

4. A dual-chamber feedback pressure regulating valve according to claim 3, characterized in that: The abutting structure includes an abutting rod (21), the top of which is used in conjunction with the bottom of an abutting plate (20). A second fixing seat (22) is fixedly connected to the bottom of the abutting rod (21). The surface of the second fixing seat (22) is fixedly connected to the inner wall of the second hollow column (16). A reinforcing plate (23) is fixedly connected to the bottom of the surface of the abutting rod (21). There are four reinforcing plates (23), which are evenly distributed.

5. A dual-chamber feedback pressure regulating valve according to claim 3, characterized in that: The bottom of the sealing cap (19) contacts the second sealing ring (24) for use. The bottom of the second sealing ring (24) is fixedly connected to the top of the first hollow column (12). A third sealing ring (25) is provided between the top of the first threaded sleeve (13) and the pressure regulating box (10). A screw (26) is provided on one side of the connecting sleeve (15). The threaded end of the screw (26) passes through the connecting sleeve (15) and extends to the surface of the first threaded sleeve (13).

6. A dual-chamber feedback pressure regulating valve according to claim 3, characterized in that: A return spring (27) is sleeved on the bottom of the surface of the guide rod (18), and the return spring (27) is located between the first fixed seat (17) and the abutment plate (20).

7. The dual-chamber feedback pressure regulating valve according to claim 1, characterized in that: The filter structure includes a connecting pipe (28), which is located on the right side of the valve body (1) and is fixedly connected to the valve body (1). A filter plate (29) is fixedly connected inside the connecting pipe (28), and a second manual ball valve (30) is fixedly connected to the bottom of the connecting pipe (28). The second manual ball valve (30) is located on the right side of the filter plate (29).

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