Multi-functional pressure regulating valve

Abstract

This utility model relates to the field of pressure regulating valve technology and discloses a multi-functional pressure regulating valve, including a frame, a multi-functional valve body fixed to one side of the frame, and a pneumatic triplet fixed to the other side of the frame, opposite to the multi-functional valve body. The multi-functional valve body includes a first valve body, a second valve body, and a third valve body fixedly connected. The second valve body is provided with an inlet, an outlet, and an overflow port, and has an adjustment chamber inside. A valve core is sleeved in the adjustment chamber. A spring is provided in the third valve body, and one end of the valve core is fixedly connected to one end of the spring. By utilizing the valve seat balance hole and the precise fit between the valve core ball and the valve seat, combined with the purification and lubrication treatment of the air circuit by the pneumatic triplet, the service life of the core components is extended. The pneumatic triplet and the low-pressure amplification valve work together to achieve precise control of the air circuit pressure. Combined with the adjustable spring preload design and the gas-liquid collaborative feedback adjustment mechanism, the pressure regulation accuracy and power supply stability are greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of pressure regulating valve technology, specifically to a multifunctional pressure regulating valve. Background Technology

[0002] In many areas of industrial production, such as high-pressure fluid transmission and hydraulic control systems, pressure regulating valves, as core control components, play a crucial role in regulating fluid pressure and stabilizing flow output. Their performance directly affects the operating efficiency, safety, and stability of the entire system. As industrial production moves towards higher efficiency and higher pressure, more stringent requirements are placed on the pressure tolerance, flow control range, structural reliability, and ease of installation and maintenance of pressure regulating valves. Currently, traditional pressure regulating valves present challenges in practical applications, including significant maintenance difficulties. Disassembly and assembly of some key components require specialized tools and involve complex procedures. When equipment malfunctions, rapid repair and component replacement are impossible, extending downtime and increasing production and operating costs. Furthermore, some pressure regulating valves exhibit significant wear and fatigue deformation of components under prolonged high-pressure operation, resulting in shorter service lives. Finally, traditional pressure regulating valves suffer from insufficient matching between air demand and pressure / flow parameters, leading to unstable power supply under high-pressure operation and affecting pressure regulation accuracy. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a multi-functional pressure regulating valve.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A multi-functional pressure regulating valve includes a frame, a multi-functional valve body fixed to one side of the frame, and a pneumatic triplet fixed to the other side of the frame, positioned opposite the multi-functional valve body. The multi-functional valve body comprises a first valve body, a second valve body, and a third valve body fixedly connected. The second valve body has an inlet, an outlet, and an overflow outlet. An adjustment chamber is provided within the second valve body, and a valve core is fitted inside the adjustment chamber. A spring is provided within the third valve body, with one end of the valve core fixedly connected to one end of the spring.

[0005] In this utility model, preferably, the first valve body includes a detachably connected cylinder seat, cylinder head, and first connecting part, one end of the first connecting part being connected to the cylinder head and the other end being connected to the second valve body.

[0006] In this utility model, preferably, a piston is fixedly disposed inside the cylinder seat, a piston rod is connected to the middle of the piston, a guide sleeve is sleeved on the outside of the piston rod, the guide sleeve is fixedly disposed inside the cylinder head, and the piston rod passes through the first connecting part and is connected to the valve core.

[0007] In this utility model, preferably, a first groove is provided on the side where the piston connects to the cylinder seat, and a first star-shaped sealing ring is provided in the first groove.

[0008] In this utility model, preferably, a second groove is provided on the side where the guide sleeve connects to the cylinder seat, and a second star-shaped sealing ring is provided in the second groove.

[0009] In this invention, preferably, two valve seats are coaxially arranged within the adjusting cavity, the valve core is sleeved within the valve seats, and a balancing hole is formed on the side wall of the valve seats. An annular groove is provided on the outer side of the valve seats, and a support ring and an O-ring are disposed within the annular groove.

[0010] In this utility model, preferably, the valve core is provided with a spherical body between the two valve seats, and the outer diameter of the spherical body is the same as the inner diameter of the end of the valve seat.

[0011] In this invention, preferably, the third valve body includes a second connecting portion and a spring seat connected together. The spring seat houses the spring, and a top post is connected to the other end of the spring. A snap-fit ​​portion is provided on the outer side of the top post, which is used to snap the spring into the spring seat. One end of the top post is placed in the second connecting portion, and the other end is placed inside the spring. Connecting grooves are provided at both ends of the second valve body for connecting to the first connecting portion.

[0012] In this utility model, preferably, the pneumatic triplet is connected to an output pipe, and the output pipe is connected to a tee, a right-angle transition joint, a low-pressure amplifying valve and an L-shaped threaded elbow, and the low-pressure amplifying valve is connected to an elbow joint.

[0013] In this utility model, preferably, the overflow port is connected to an overflow pipe, the overflow pipe including an adapter bolt, a connecting pipe, an adapter and a copper elbow connected in sequence, and a water guide pipe and a valve pipe are also sleeved inside the connecting pipe.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This invention features a detachable cylinder seat, cylinder head, and first connecting part for the first valve body, and modular connections for each component of the overflow pipe. This significantly simplifies the disassembly and assembly process of key components, allowing for rapid maintenance and replacement without the need for specialized and complex tools. This significantly reduces equipment downtime and lowers operating costs. Optimized structures, such as the valve seat balance hole, precise fit between the valve core ball and valve seat, and double sealing with star-shaped and O-ring seals, combined with pneumatic triplet lubrication of the air path, effectively reduce component wear, jamming, and fatigue deformation under high-pressure conditions, extending the service life of core components. Precise air pressure control is achieved through the pneumatic triplet and low-pressure amplification valve. Combined with an adjustable spring preload design and a gas-liquid synergistic feedback regulation mechanism, air demand is highly matched with pressure and flow parameters, significantly improving pressure regulation accuracy and power supply stability. Furthermore, it integrates multiple functions such as pressure regulation, overflow, and air path processing, simplifying pipeline layout and improving system adaptability. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a multifunctional pressure regulating valve according to the present invention.

[0016] Figure 2 for Figure 1 The front view.

[0017] Figure 3 for Figure 1 Rear view.

[0018] Figure 4 This is a schematic diagram of the structure of the multi-functional valve body of a multi-functional pressure regulating valve according to this utility model.

[0019] Figure 5 for Figure 4 The left view.

[0020] Figure 6 for Figure 5 Sectional view along direction AA.

[0021] In the attached diagram: 1-Frame, 2-Multi-functional valve body, 3-Pneumatic triplet, 4-First valve body, 5-Second valve body, 6-Third valve body, 7-Inlet, 8-Outlet, 9-Overflow port, 10-Valve core, 11-Spring, 12-Cylinder seat, 13-Cylinder head, 14-First connecting part, 15-Piston, 16-Piston rod, 17-Guide sleeve, 18-First star-shaped seal ring, 19-Second star-shaped seal ring. 20-Valve seat, 21-Balance hole, 22-Spherical body, 23-Second connection part, 24-Spring seat, 25-Top column, 26-Snap-fit ​​part, 27-Tee, 28-Right angle transition joint, 29-Low pressure amplifying valve, 30-L-type threaded elbow, 31-Elbow joint, 32-Overflow pipe, 33-Adapter bolt, 34-Connecting pipe, 35-Adapter, 36-All-copper elbow, 37-Water guide pipe, 38-Valve pipe. Detailed Implementation

[0022] 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.

[0023] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is described as "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is described as "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] Please also see Figures 1 to 6A preferred embodiment of this utility model provides a multi-functional pressure regulating valve, comprising: a frame 1, a multi-functional valve body 2, and a pneumatic triplet 3. The frame 1 includes a crossbeam and two side plates fixed to both ends of the crossbeam. The multi-functional valve body 2 is bolted to one side of the frame 1. The pneumatic triplet 3 is bolted to the other side of the frame 1 and is disposed opposite to the multi-functional valve body 2. The multi-functional valve body 2 includes a first valve body 4, a second valve body 5, and a third valve body 6 fixedly connected. The second valve body 5 is provided with an inlet 7, an outlet 8, and an overflow port 9, respectively. An adjustment chamber is provided inside the second valve body 5, and a valve core 10 is sleeved within the adjustment chamber. A spring 11 is provided inside the third valve body 6, and one end of the valve core 10 is fixedly connected to one end of the spring 11.

[0026] Specifically, the pneumatic control valve of the first valve body 4 is connected to the pneumatic section of the pneumatic triplet 3. High-pressure water flows in from the inlet 7 and flows out from the outlet 8. The system target pressure is preset by the pressure regulating component in the pneumatic triplet 3. This pressure signal is transmitted to the multi-functional valve body 2, forming an initial balance with the preload of the spring 11 in the third valve body 6. At this time, the valve core 10 is in the reference position of the regulating chamber under the thrust of the spring 11. A stable initial flow area is formed between the inlet 7 and the outlet 8. After the fluid enters the regulating chamber through the inlet 7, it is output from the outlet 8 at the set pressure.

[0027] When the outlet pressure is higher than the set value, the thrust of the fluid pressure acting on the valve core 10 is greater than the preload of the spring 11, pushing the valve core 10 to move in the direction of compressing the spring 11, reducing the flow area between the inlet 7 and the outlet 8, and limiting the fluid inflow; at the same time, the excess fluid exceeding the set pressure is quickly released through the overflow port 9 to prevent the system pressure from continuing to rise until the fluid pressure at both ends of the valve core 10 and the force of the spring 11 are rebalanced, and the outlet pressure returns to the set value.

[0028] When the outlet pressure is lower than the set value, the preload of spring 11 is greater than the force exerted by the fluid pressure on valve core 10. Spring 11 pushes valve core 10 to move in the direction of expanding the flow area, increasing the fluid inflow and causing the outlet pressure to gradually rise until a force balance is achieved again, ensuring stable outlet pressure. The pneumatic triplet 3 simultaneously performs auxiliary functions during operation: its built-in filter first centrifuges and removes water and solid impurities from the incoming compressed air, preventing moisture and impurities from entering the multi-functional valve body 2 and causing valve core 10 to jam or fail to seal; subsequently, the clean air stabilized by the pressure regulating valve provides a precise control signal for the pressure regulation of the multi-functional valve body 2, while the lubricator adds lubricating droplets to the air path as needed, reducing frictional wear of moving parts inside the valve body and ensuring the sensitivity of the regulation action. This pressure regulating valve integrates pressure regulation, overflow, air purification, and lubrication functions into one unit. The core regulation function is achieved through the fixed connection of the first valve body 4, the second valve body 5, and the third valve body 6. With the assistance of the pneumatic triplet 3, it eliminates the need for multiple independent valves and auxiliary devices, effectively simplifying the pipeline layout and reducing system installation space and integration costs. The overflow port 9 allows for rapid discharge of excess fluid in case of system overpressure, preventing damage to the valve body or downstream pipelines due to excessive pressure, thus providing safety protection. The pneumatic triplet 3 purifies and lubricates the air path, extending the service life of core components such as the valve core 10 and spring 11, making the pressure regulating valve adaptable to fluid control systems with different media and pressure levels, thus enhancing compatibility. The core pressure regulation process relies on the balance between the fluid's own pressure and the force of the spring 11, requiring no additional external power, resulting in significant energy savings. Furthermore, the mechanical force balance regulation mechanism offers rapid response and strong anti-interference capabilities, providing higher reliability and a lower failure rate under harsh operating conditions compared to electronic control methods.

[0029] In this embodiment, the first valve body 4 includes a detachably connected cylinder seat 12, a cylinder head 13, and a first connecting part 14. One end of the first connecting part 14 is connected to the cylinder head 13, and the other end is connected to the second valve body 5.

[0030] In this embodiment, a piston 15 is fixedly installed inside the cylinder seat 12. A piston rod 16 is connected to the middle of the piston 15. A guide sleeve 17 is sleeved on the outside of the piston rod 16. The guide sleeve 17 is fixedly installed inside the cylinder head 13. The piston rod 16 passes through the first connecting part 14 and connects to the valve core 10. A first groove is formed on the side of the piston 15 connected to the cylinder seat 12, and a first star-shaped sealing ring 18 is provided in the first groove. A second groove is formed on the side of the guide sleeve 17 connected to the cylinder seat 12, and a second star-shaped sealing ring 19 is provided in the second groove. During the operation of the first valve body 4, compressed air enters the cylinder seat 12 after being processed by the pneumatic triplet 3. The compressed air acts on the piston 15, pushing the piston 15 to move axially along the cylinder seat 12. The piston 15 then drives the piston rod 16 connected in the middle to move synchronously. The guide sleeve 17 sleeved on the outside of the piston rod 16 guides the movement of the piston rod 16, ensuring that the piston rod 16 can move stably and accurately along the axial direction. After passing through the first connecting part 14, the piston rod 16 connects to the valve core 10. Therefore, the movement of the piston rod 16 directly drives the valve core 10 to move within the adjustment chamber of the second valve body 5, thereby changing the flow area between the valve core 10 and the second valve body 5, and thus regulating the fluid flow rate and pressure. Simultaneously, a first star-shaped sealing ring 18 is provided in the first groove on the side where the piston 15 connects to the cylinder seat 12. This effectively seals the gap between the piston 15 and the cylinder seat 12, preventing compressed air leakage and ensuring that compressed air can fully act on the piston 15, providing a stable driving force. A second star-shaped sealing ring 19 is provided in the second groove on the side where the guide sleeve 17 connects to the cylinder seat 12. This seals the gap between the guide sleeve 17 and the cylinder seat 12, preventing compressed air leakage and further ensuring the pressure stability of the compressed air within the cylinder seat 12, providing a reliable pneumatic environment for the stable movement of the piston 15.

[0031] In this embodiment, two valve seats 20 are coaxially arranged within the regulating chamber, and the valve core 10 is fitted inside the valve seat 20. A balance hole 21 is provided on the side wall of the valve seat 20. An annular groove is provided on the outer side of the valve seat 20, and a support ring and an O-ring are provided within the annular groove. During the operation of the regulating chamber, the valve core 10, fitted within the two coaxially arranged valve seats 20, can move axially along the valve seat 20, thereby changing the flow area between the valve core 10 and the valve seat 20, and thus regulating the fluid flow rate and pressure. When fluid enters the regulating chamber from the inlet 7, it acts on the valve core 10. The balance hole 21 on the side wall of the valve seat 20 keeps the pressure on both sides of the valve core 10 balanced, preventing the valve core 10 from becoming stuck or moving sluggishly due to excessive pressure difference. This ensures that the valve core 10 can move flexibly within the valve seat 20 according to actual operating conditions, driven by the piston rod 16 or under its own force balance, precisely adjusting the flow area. The support ring provided in the annular groove on the outer side of the valve seat 20 provides support for the valve seat 20, ensuring that the valve seat 20 is stably positioned within the regulating chamber and will not shift due to fluid impact or other factors. This ensures the coaxiality of the valve core 10 and the valve seat 20, making the movement of the valve core 10 smoother and more precise. The O-ring seal in the annular groove is used to seal the gap between the valve seat 20 and the inner wall of the regulating chamber, preventing fluid leakage from this gap and ensuring that the fluid can flow according to the preset flow path. Through the cooperation of the valve core 10 and the valve seat 20, effective flow and pressure regulation is achieved.

[0032] In this embodiment, a spherical body 22 is disposed between the two valve seats 20 on the valve core 10. The outer diameter of the spherical body 22 is the same as the inner diameter of the end of the valve seat 20. When fluid enters the regulating chamber from the inlet 7, it acts on the valve core 10. The spherical body 22 on the valve core 10, located between the two valve seats 20, has the same outer diameter as the inner diameter of the end of the valve seat 20. During the axial movement of the valve core 10 along the valve seat 20, the spherical body 22 forms a mating relationship with the end of the valve seat 20. When it is necessary to regulate the flow rate or pressure, the valve core 10 moves, and the position of the spherical body 22 relative to the end of the valve seat 20 changes, thereby changing the flow area between the spherical body 22 and the end of the valve seat 20. Due to the shape characteristics of the spherical body 22, precise throttling or conduction control of the fluid flow can be achieved under different positions of the valve core 10. Meanwhile, the fit between the ball 22 and the end of the valve seat 20 also helps to guide the flow direction and state of the fluid during the movement of the valve core 10, reduce turbulence and pressure loss during the fluid flow process, and enable the fluid to flow more smoothly through the regulating chamber and out of the outlet 8.

[0033] In this embodiment, the third valve body 6 includes a second connecting part 23 and a spring seat 24 connected together. The spring seat 24 houses the spring 11, and a top post 25 is connected to the other end of the spring 11. A snap-fit ​​part 26 is provided on the outside of the top post 25, which is used to snap the spring 11 into the spring seat 24. One end of the top post 25 is placed in the second connecting part 23, and the other end is placed inside the spring 11. During assembly, the spring 11 is placed in the spring seat 24, with one end of the spring 11 fixedly connected to the valve core 10, and the other end sleeved on the outside of the top post 25. The top post 25 is snapped into a preset groove in the spring seat 24 by the snap-fit ​​part 26 on the outside, forming an axial limit on the spring 11. By adjusting the initial position of the top post 25 in the spring seat 24, the preload of the spring 11 can be accurately set. This preload is directly converted into the initial balance pressure of the valve core 10, setting a target pressure reference for the pressure regulating valve. When the fluid pressure in the regulating chamber of the second valve body 5 fluctuates, the pressure change is transmitted to the spring 11 through the valve core 10. When the fluid pressure is higher than the preset reference, the pressure pushes the valve core 10 to move towards the third valve body 6, compressing the spring 11. The spring 11 generates an elastic reaction force in the opposite direction to the pressure change until the fluid pressure equals the reaction force of the spring 11. At this time, the valve core 10 stops moving, and the flow area between the valve core 10 and the valve seat 20 decreases. Excess fluid is discharged through the overflow port 9, and the outlet pressure drops back to the reference value. When the fluid pressure is lower than the preset reference, the preload of the spring 11 pushes the valve core 10 to move towards the second valve body 5, stretching the spring 11. The elastic reaction force decreases until a force balance is achieved again. The flow area between the valve core 10 and the valve seat 20 increases, the fluid inflow increases, and the outlet pressure rises back to the reference value.

[0034] The second valve body 5 has connecting grooves at both ends, which are used to connect to the first connecting part 14. The connecting grooves at both ends of the second valve body 5 are connected to the first connecting part 14 of the first valve body 4 and the second connecting part 23 of the third valve body 6 by bolts. The groove depth and inner diameter of the connecting groove are precisely matched with the dimensions of the corresponding connecting parts to ensure that the first valve body 4, the second valve body 5, and the third valve body 6 are assembled coaxially, avoiding valve core 10 jamming due to eccentricity. At the same time, the rigid connection structure can stably transmit the driving force of the piston rod 16 and the reaction force of the spring 11, ensuring the linearity of the movement and adjustment accuracy of the valve core 10.

[0035] In this embodiment, the pneumatic triplet 3 is connected to an output pipe, which is connected to a tee 27, a right-angle transition joint 28, a low-pressure amplifying valve 29, and an L-shaped threaded elbow 30. The low-pressure amplifying valve 29 is connected to an elbow 31. The right-angle transition joint 28 is the air pressure outlet of the pneumatic triplet 3, which is used to connect to the air pressure inlet of the rotary gun. The elbow 31 is connected to the air return port of the rotary gun, and the L-shaped threaded elbow 30 is connected to the first valve body 4. The pneumatic triplet 3 includes a built-in filter, pressure regulating valve, and oil mist lubricator. The pneumatic triplet mainly adopts the standard triplet model AC2000. Compressed air first enters the pneumatic triplet 3, and after being filtered to remove water, stabilized, and lubricated by oil mist, it is output from the air pressure outlet of the pneumatic triplet 3, i.e., the right-angle transition joint 28. It is divided into two air paths: one path is directly connected to the air pressure inlet of the rotary gun through the right-angle transition joint 28, providing a clean and stable driving air source for the rotary gun, ensuring that the rotation speed and torque of the rotary gun meet the requirements of high-pressure operation; the other path passes through the output pipe in sequence through the tee 27, the low-pressure amplifying valve 29, and the elbow joint 31, and finally connects to the return air port of the rotary gun, forming the return air circuit of the rotary gun. The low-pressure amplifying valve 29 can precisely adjust the return air pressure, and by controlling the return air pressure, it helps to adjust the rotational resistance of the rotary gun, avoiding sudden changes in the rotation speed of the rotary gun due to load fluctuations. The output pipe is also connected to the first valve body 4 via an L-shaped threaded elbow. Clean compressed air, after being processed by the pneumatic triplet 3, enters the cylinder seat 12 and acts on the end face of the piston 15, pushing the piston 15 to drive the piston rod 16 to move axially, thereby driving the valve core 10 to move in the regulating chamber of the second valve body 5, thereby realizing the regulation of fluid flow and pressure. The 90° bending structure of the L-shaped threaded elbow can be adapted to the spatial layout of the pneumatic triplet 3 and the first valve body 4 on both sides of the frame 1, ensuring smooth air circuit connection and not occupying additional installation space. As a secondary regulating unit for air circuit pressure, the low-pressure amplification valve 29 can sense the pressure change of the rotary gun return port in real time. When the return air pressure increases due to the increased load of the rotary gun, the low-pressure amplification valve 29 automatically reduces the valve opening and reduces the return air flow to maintain stable return air pressure. At the same time, the pneumatic control pressure of the first valve body 4 and the fluid pressure of the second valve body 5 work together. When the fluid pressure is too high, the valve core 10 pushes the spring 11 to compress, which indirectly feeds back to the piston 15 through the piston rod 16. The piston 15 can finely adjust the air circuit volume, assisting the pneumatic triplet 3 in maintaining stable pneumatic control pressure, forming a closed loop of gas-liquid coordinated pressure regulation.

[0036] In this embodiment, the overflow port 9 is connected to an overflow pipe 32. The overflow pipe 32 includes a connecting bolt 33, a connecting pipe 34, a connector 35, and a copper elbow 36 connected in sequence. A water guide pipe 37 and a valve pipe 38 are also sleeved inside the connecting pipe 34. When the fluid pressure in the regulating chamber of the second valve body 5 exceeds a preset safety value, the excess fluid enters the overflow pipe 32 through the overflow port 9. The overflow port 9 is threadedly connected to the connecting bolt 33 of the overflow pipe 32. The inner diameter of the connecting bolt 33 is precisely matched with the inner diameter of the overflow port 9 to ensure that the overpressure fluid enters the connecting pipe 34 without obstruction. At the same time, the sealing thread structure of the connecting bolt 33 can prevent fluid from leaking from the connection point and ensure the sealing performance of the overpressure relief.

[0037] The above description is a detailed description of the preferred embodiments of the present utility model. However, the embodiments are not intended to limit the scope of the patent application of the present utility model. All equivalent changes or modifications made under the technical concept suggested by the present utility model should fall within the patent scope covered by the present utility model.

Claims

1. A multifunctional pressure regulating valve characterized by, include: Framework (1), Multifunctional valve body (2), the multifunctional valve body (2) is fixed to one side of the frame (1); A pneumatic triplet (3) is fixed on the other side of the frame (1) and is arranged opposite to the multi-functional valve body (2); The multifunctional valve body (2) includes a first valve body (4), a second valve body (5) and a third valve body (6) that are fixedly connected. The second valve body (5) is provided with an inlet (7), an outlet (8) and an overflow outlet (9) respectively. An adjustment cavity is provided inside the second valve body (5), and a valve core (10) is sleeved inside the adjustment cavity. A spring (11) is provided inside the third valve body (6), and one end of the valve core (10) is fixedly connected to one end of the spring (11).

2. The multi-functional pressure regulating valve according to claim 1, wherein The first valve body (4) includes a detachably connected cylinder seat (12), cylinder head (13) and a first connecting part (14), one end of the first connecting part (14) is connected to the cylinder head (13) and the other end is connected to the second valve body (5).

3. A multifunctional pressure regulating valve according to claim 2, characterized in that, A piston (15) is fixedly installed inside the cylinder seat (12). A piston rod (16) is connected to the middle of the piston (15). A guide sleeve (17) is sleeved on the outside of the piston rod (16). The guide sleeve (17) is fixedly installed inside the cylinder head (13). The piston rod (16) passes through the first connecting part (14) and is connected to the valve core (10).

4. The multi-functional pressure regulating valve according to claim 3, wherein The piston (15) is provided with a first groove on the side where it connects with the cylinder seat (12), and a first star-shaped sealing ring (18) is provided in the first groove.

5. A multifunctional pressure regulating valve according to claim 4, characterized in that, The guide sleeve (17) is provided with a second groove on the side where it connects with the cylinder seat (12), and a second star-shaped sealing ring (19) is provided in the second groove.

6. The multi-functional pressure regulating valve according to claim 1, wherein Two valve seats (20) are coaxially arranged in the regulating cavity. The valve core (10) is sleeved in the valve seat (20). The valve seat (20) has a balance hole (21) on its side wall.

7. A multifunctional pressure regulating valve according to claim 6, characterized in that, The valve core (10) is provided with a spherical body (22) between the two valve seats (20), and the outer diameter of the spherical body (22) is the same as the inner diameter of the end of the valve seat (20).

8. A multifunctional pressure regulating valve according to claim 1, characterized in that, The third valve body (6) includes a second connecting part (23) and a spring seat (24) connected together. The spring seat (24) is used to place the spring (11). The other end of the spring (11) is also connected to a top post (25). A snap-fit ​​part (26) is provided on the outside of the top post (25). The snap-fit ​​part (26) is used to snap the spring (11) into the spring seat (24). One end of the top post (25) is placed in the second connecting part (23), and the other end is placed in the spring (11).

9. A multifunctional pressure regulating valve according to claim 1, characterized in that, The pneumatic triplet (3) is connected to an output pipe, and the output pipe is connected to a tee (27), a right-angle transition joint (28), a low-pressure amplification valve (29) and an L-shaped threaded elbow (30), and the low-pressure amplification valve (29) is connected to an elbow joint (31).

10. A multifunctional pressure regulating valve according to claim 1, characterized in that, The overflow port (9) is connected to an overflow pipe (32), which includes a converter bolt (33), a connecting pipe (34), a converter (35) and a copper elbow (36) connected in sequence. The connecting pipe (34) is also fitted with a water guide pipe (37) and a valve pipe (38).

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