A sealed pressure reducing valve

Abstract

The utility model discloses a kind of sealing pressure reducing valve, it is related to pressure reducing valve technical field, including valve body, the water inlet end and water outlet end are respectively arranged in the both ends of valve body;Valve body inside is equipped with pressure reducing chamber, the bottom of pressure reducing chamber is communicated with water inlet end, the top of pressure reducing chamber is communicated with water outlet end, the top of valve body is fixedly connected with installation sleeve pipe, the bottom of valve body is equipped with overhaul hole.This kind of sealing pressure reducing valve, the utility model passes through the multistage linkage structure of pressure reducing chamber, drive cavity and pressure chamber, forms closed loop pressure feedback mechanism, when the pressure change in pressure reducing chamber, pressure reducing plug changes drive cavity pressure distribution by adjusting rod driven trigger plug, the pressure change is transmitted to pressure chamber after pipeline, can directly drive flow control plug to carry out displacement adjustment, realize the dynamic control to the communication area of flow control chamber and pressure chamber.Simultaneously, the buffering effect of adjusting spring further inhibits pressure fluctuation, ensure that water outlet end pressure output is stable.

Description

Technical Field

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

[0002] A pressure reducing valve is a key device used to control fluid pressure, reducing high-pressure fluids to the required stable low-pressure level and maintaining a constant outlet pressure when inlet pressure or flow fluctuates.

[0003] For example, Chinese Patent CN119084623A discloses a pressure reducing and switching valve, which includes a valve body, valve cover, pressure reducing cylinder, valve core, an inlet channel, and two outlet channels. Through the arrangement of the inlet and outlet channels, pressure reducing cylinder, and valve core, the valve automatically adjusts the position of the pressure reducing cylinder and valve core under the action of inlet pressure, automatically changes the flow area between the valve core and the third flow hole, and changes the number of pressure reducing holes connected to the second outlet channel, thereby realizing automatic adjustment of pressure reducing amplitude and automatic switching of outlet channels. The valve is adjusted by a matching adjusting rod, which facilitates the adjustment of the position of the first adjusting block, the second adjusting block, and the third adjusting block, thereby adjusting the pressure reducing and switching parameters of the valve.

[0004] In the existing technology, some pressure reducing valves rely on a single valve core for adjustment and lack a closed-loop feedback mechanism. This makes the output pressure susceptible to fluctuations in inlet water pressure, and the pressure reducing structure has a fixed adjustment range, making it difficult to adapt to pressure requirements in various scenarios. Utility Model Content

[0005] The purpose of this invention is to provide a sealed pressure reducing valve to solve the problem in the background art where some pressure reducing valves rely on a single valve core for adjustment and lack a closed-loop feedback mechanism, resulting in the output pressure being easily affected by fluctuations in inlet water pressure.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a sealing pressure reducing valve, comprising a valve body, wherein the valve body is provided with an inlet end and an outlet end at both ends; The valve body has a pressure reducing chamber inside. The bottom of the pressure reducing chamber is connected to the water inlet end, and the top of the pressure reducing chamber is connected to the water outlet end. An installation sleeve is fixedly connected to the top of the valve body. An inspection hole is provided at the bottom of the valve body, and a sealing cover for sealing the inspection hole is installed at the bottom of the valve body. A sealing ring is provided at the connection between the pressure reducing chamber and the water inlet end. An installation bracket is fixedly connected in the middle of the inside of the pressure reducing chamber.

[0007] Preferably, an adjusting rod is slidably connected inside the pressure reducing chamber via a mounting bracket, a pressure reducing plug is fixedly connected to the bottom of the adjusting rod, the pressure reducing plug is located at the top of the sealing ring and forms a valve structure with a sealing fit with the sealing ring, and a trigger plug is fixedly connected to the top of the adjusting rod.

[0008] Preferably, the top of the pressure relief chamber is provided with a driving chamber, which communicates with the interior of the pressure relief chamber. The trigger plug divides the interior of the driving chamber into upper and lower parts, wherein the lower half of the driving chamber communicates with the pressure relief chamber.

[0009] Preferably, the mounting sleeve has a flow control chamber, a pressure chamber, and an adjustment chamber arranged sequentially from bottom to top inside. The top of the adjustment chamber is provided with a sliding sleeve, and the upper part of the pressure chamber and the drive chamber are connected to each other through a pipe.

[0010] Preferably, a flow control plug that moves up and down is installed inside the flow control cavity. An adjusting plug is fixedly connected to the top of the flow control plug via a connecting rod. The flow control plug forms a valve structure with a sealing fit at the connection between the flow control plug, the flow control cavity, and the pressure cavity. A pressure spring is fixedly connected between the bottom of the flow control plug and the bottom of the flow control cavity.

[0011] Preferably, the adjusting plug is slidably connected inside the adjusting cavity, the adjusting plug divides the inside of the adjusting cavity into upper and lower parts, and a lower pressure block is fixedly connected to the top of the adjusting plug by a connecting rod.

[0012] Preferably, the lower pressure block is slidably connected inside the sliding sleeve, an adjusting spring is fixedly connected to the top of the lower pressure block, a lead screw is fixedly connected to the top of the adjusting spring, and the upper end of the lead screw passes through the top of the sliding sleeve and is threadedly connected to the middle of the top of the sliding sleeve.

[0013] Preferably, a second guide pipe is provided between the inside of the water inlet and the inside of the flow control chamber, and a first guide pipe is provided between the upper part of the adjustment chamber and the inside of the pressure reducing chamber. Both the first guide pipe and the second guide pipe are located inside the valve body.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This invention relates to a sealed pressure reducing valve. Through a multi-stage linkage structure of a pressure reducing chamber, a drive chamber, and a pressure chamber, a closed-loop pressure feedback mechanism is formed. When the pressure in the pressure reducing chamber changes, the pressure reducing plug drives the trigger plug to change the pressure distribution in the drive chamber through the adjusting rod. This pressure change is transmitted to the pressure chamber through the pipeline and can directly drive the flow control plug to adjust its displacement, thereby achieving dynamic control of the connection area between the flow control chamber and the pressure chamber. At the same time, the buffering effect of the adjusting spring further suppresses pressure fluctuations and ensures stable pressure output at the outlet.

[0015] By rotating the lead screw, the preload of the adjusting spring on the lower pressure block can be changed, thereby adjusting the initial position of the adjusting plug and achieving precise setting of the valve's pressure reduction range. This structure enables the valve to adapt to pressure requirements under different working conditions, and the linkage transmission mechanism ensures that the adjustment accuracy is not affected by fluid disturbances. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic cross-sectional view of the present invention. Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a schematic diagram of the cross-sectional structure of the valve body of this utility model; Figure 5 This is a schematic diagram of the adjusting plug structure of this utility model; Figure 6 This is a schematic diagram of the lead screw structure of this utility model.

[0017] In the diagram: 1. Valve body; 2. Inlet; 3. Outlet; 4. Pressure reducing chamber; 5. Mounting sleeve; 6. Sealing cap; 7. Sealing ring; 8. Mounting bracket; 9. Adjusting rod; 10. Pressure reducing plug; 11. Trigger plug; 12. Drive chamber; 13. Flow control chamber; 14. Pressure chamber; 15. Adjusting chamber; 16. Sliding sleeve; 17. Flow control plug; 18. Adjusting plug; 19. Pressure spring; 20. Lower pressure block; 21. Adjusting spring; 22. Lead screw; 23. First guide pipe; 24. Second guide pipe. Detailed Implementation

[0018] 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.

[0019] Example 1: Please refer to Figures 1 to 6 The present invention provides the following technical solution: like Figure 1 As shown, a sealing pressure reducing valve includes a valve body 1, with an inlet end 2 and an outlet end 3 at both ends of the valve body 1; Figure 2 As shown, the valve body 1 has a pressure reducing chamber 4 inside. The bottom of the pressure reducing chamber 4 is connected to the water inlet 2, and the top of the pressure reducing chamber 4 is connected to the water outlet 3. An installation sleeve 5 is fixedly connected to the top of the valve body 1. An inspection hole is provided at the bottom of the valve body 1, and a sealing cover 6 for sealing the inspection hole is installed at the bottom of the valve body 1. A sealing ring 7 is provided at the connection between the pressure reducing chamber 4 and the water inlet 2. An installation bracket 8 is fixedly connected in the middle inside the pressure reducing chamber 4.

[0020] like Figure 3 As shown, an adjusting rod 9 is slidably connected inside the pressure reducing chamber 4 via a mounting bracket 8. A pressure reducing plug 10 is fixedly connected to the bottom of the adjusting rod 9. The pressure reducing plug 10 is located on top of the sealing ring 7 and forms a valve structure with a sealing fit with the sealing ring 7. A trigger plug 11 is fixedly connected to the top of the adjusting rod 9.

[0021] like Figure 4 As shown, the top of the pressure reducing chamber 4 is provided with a driving chamber 12, which is connected to the interior of the pressure reducing chamber 4. The trigger plug 11 divides the interior of the driving chamber 12 into two parts, the lower half of which is connected to the pressure reducing chamber 4. The installation sleeve 5 is provided with a flow control chamber 13, a pressure chamber 14, and an adjustment chamber 15 from bottom to top. The top of the adjustment chamber 15 is provided with a sliding sleeve 16. The pressure chamber 14 and the upper half of the driving chamber 12 are connected to each other by a pipe.

[0022] like Figure 3 As shown, a flow control plug 17 that moves up and down is installed inside the flow control cavity 13. An adjusting plug 18 is fixedly connected to the top of the flow control plug 17 via a connecting rod. The flow control plug 17 forms a valve structure with a sealed fit at the connection between the flow control cavity 13 and the pressure cavity 14. A pressure spring 19 is fixedly connected between the bottom of the flow control plug 17 and the bottom of the flow control cavity 13.

[0023] like Figure 5 and Figure 6 As shown, the regulating plug 18 is slidably connected to the inside of the regulating cavity 15, dividing the inside of the regulating cavity 15 into upper and lower parts. The top of the regulating plug 18 is fixedly connected to the lower pressure block 20 via a connecting rod. The lower pressure block 20 is slidably connected to the inside of the sliding sleeve 16. The top of the lower pressure block 20 is fixedly connected to the regulating spring 21. The top of the regulating spring 21 is fixedly connected to the lead screw 22. The upper end of the lead screw 22 passes through the top of the sliding sleeve 16 and is threadedly connected to the middle of the top of the sliding sleeve 16. A second guide pipe 24 is provided between the inside of the water inlet 2 and the inside of the flow control cavity 13. A first guide pipe 23 is provided between the upper part of the regulating cavity 15 and the inside of the pressure reducing cavity 4. Both the first guide pipe 23 and the second guide pipe 24 are located inside the valve body 1.

[0024] When fluid enters valve body 1 from inlet 2, a portion of the fluid flows into control chamber 13 through second guide pipe 24. The fluid in control chamber 13 exerts upward pressure on the bottom of control plug 17, while the top of control plug 17 is subjected to the pressure of fluid in pressure chamber 14 and the elastic force of pressure spring 19. Initially, control plug 17 is in a specific position under the balance of these forces, maintaining a certain communication between control chamber 13 and pressure chamber 14. Simultaneously, another portion of fluid directly enters the bottom of pressure reducing chamber 4. Since the bottom of pressure reducing chamber 4 is connected to inlet 2, the fluid pressure acts on the bottom of pressure reducing plug 10, pushing it upward. Pressure reducing plug 10, through adjusting rod 9, drives trigger plug 11 to slide upward synchronously. The trigger plug 11 divides the drive chamber 12 into upper and lower parts, and the lower half of the drive chamber 12 is connected to the pressure reducing chamber 4. When the trigger plug 11 moves upward, the volume of the lower half of the drive chamber 12 increases and the pressure decreases, while the volume of the upper half decreases and the pressure increases. Since the upper half of the drive chamber 12 is connected to the pressure chamber 14 through a pipe, the pressure change in the upper half of the drive chamber 12 will be transmitted to the pressure chamber 14, causing the pressure in the pressure chamber 14 to increase accordingly.

[0025] When the pressure inside the pressure chamber 14 increases, it exerts a greater downward pressure on the top of the flow control plug 17, disrupting the original force balance of the flow control plug 17 and pushing it downward. As the flow control plug 17 moves downward, it compresses the pressure spring 19, causing it to generate a greater counterforce, and simultaneously drives the adjusting plug 18 downward through the connecting rod. When the adjusting plug 18 moves downward within the adjusting chamber 15, it reduces the volume of the upper half of the adjusting chamber 15. Since the upper half of the adjusting chamber 15 is connected to the pressure reducing chamber 4 through the first guide pipe 23, the pressure in the upper half of the adjusting chamber 15 increases accordingly. This pressure acts on the lower pressure block 20 through the connecting rod, and the adjusting spring 21 at the top of the lower pressure block 20 deforms accordingly based on the displacement of the lower pressure block 20, thus providing a buffering and regulating effect.

[0026] As the flow control plug 17 moves downward, the sealing fit between it and the flow control chamber 13 and the pressure chamber 14 gradually increases, which reduces the amount of fluid delivered from the flow control chamber 13 to the pressure chamber 14, thereby causing the pressure in the pressure chamber 14 to gradually decrease until the flow control plug 17 reaches a new state of force equilibrium again.

[0027] When the fluid pressure in the pressure reducing chamber 4 decreases, the thrust acting on the bottom of the pressure reducing plug 10 decreases. Under the gravity of the adjusting rod 9 and the trigger plug 11, the pressure reducing plug 10 moves downward. The downward movement of the trigger plug 11 increases the volume of the upper half of the drive chamber 12 and reduces the pressure. The pressure in the pressure chamber 14 also decreases accordingly. Under the combined action of the elastic force of the pressure spring 19 and the fluid pressure in the flow control chamber 13, the flow control plug 17 moves upward, increasing the communication area between the flow control chamber 13 and the pressure chamber 14, increasing the fluid delivery, and causing the pressure in the pressure chamber 14 to rise again, thus achieving balance once more.

[0028] If it is necessary to set the pressure reduction range of the valve, the lead screw 22 can be rotated. Since the lead screw 22 is threadedly connected to the top of the sliding sleeve 16, the lead screw 22 will move up and down axially when rotated, thereby changing the initial pressure on the lower pressure block 20 by adjusting the spring 21. The initial position of the adjusting plug 18 also changes accordingly, thereby adjusting the pressure balance benchmark of the entire valve system to achieve the pressure reduction requirements under different operating conditions. Through the above series of mechanical linkages and pressure regulation, the fluid flowing from the top of the pressure reducing chamber 4 into the outlet 3 is ultimately kept at a stable pressure output.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sealed pressure reducing valve, comprising a valve body (1), wherein the valve body (1) is provided with an inlet end (2) and an outlet end (3) at both ends; Its features are: The valve body (1) is provided with a pressure reducing chamber (4) inside. The bottom of the pressure reducing chamber (4) is connected to the water inlet (2), and the top of the pressure reducing chamber (4) is connected to the water outlet (3). The top of the valve body (1) is fixedly connected with an installation sleeve (5). The bottom of the valve body (1) is provided with an inspection hole, and the bottom of the valve body (1) is equipped with a sealing cover (6) to seal the inspection hole. The connection between the pressure reducing chamber (4) and the water inlet (2) is provided with a sealing ring (7). The middle of the inside of the pressure reducing chamber (4) is fixedly connected with an installation bracket (8).

2. The sealing pressure reducing valve according to claim 1, characterized in that: Inside the pressure reducing chamber (4), an adjusting rod (9) is slidably connected via a mounting bracket (8). A pressure reducing plug (10) is fixedly connected to the bottom of the adjusting rod (9). The pressure reducing plug (10) is located on top of the sealing ring (7) and forms a valve structure with a sealing fit with the sealing ring (7). A trigger plug (11) is fixedly connected to the top of the adjusting rod (9).

3. A sealing pressure reducing valve according to claim 2, characterized in that: The pressure relief chamber (4) is provided with a driving chamber (12) at the top. The driving chamber (12) communicates with the interior of the pressure relief chamber (4). The trigger plug (11) divides the interior of the driving chamber (12) into two parts, the lower half of which communicates with the pressure relief chamber (4).

4. A sealing pressure reducing valve according to claim 3, characterized in that: The installation sleeve (5) is provided with a flow control chamber (13), a pressure chamber (14), and an adjustment chamber (15) from bottom to top. The top of the adjustment chamber (15) is provided with a sliding sleeve (16). The pressure chamber (14) and the upper part of the drive chamber (12) are connected to each other by a pipe.

5. A sealing pressure reducing valve according to claim 4, characterized in that: The flow control chamber (13) is equipped with a flow control plug (17) that moves up and down. The top of the flow control plug (17) is fixedly connected to an adjusting plug (18) via a connecting rod. The flow control plug (17) forms a valve structure with a sealed fit at the connection between the flow control chamber (13) and the pressure chamber (14). A pressure spring (19) is fixedly connected between the bottom of the flow control plug (17) and the bottom of the flow control chamber (13).

6. A sealing pressure reducing valve according to claim 5, characterized in that: The adjusting plug (18) is slidably connected inside the adjusting cavity (15). The adjusting plug (18) divides the inside of the adjusting cavity (15) into upper and lower parts. The top of the adjusting plug (18) is fixedly connected to the lower pressure block (20) by a connecting rod.

7. A sealing pressure reducing valve according to claim 6, characterized in that: The lower pressure block (20) is slidably connected inside the sliding sleeve (16). An adjusting spring (21) is fixedly connected to the top of the lower pressure block (20). A lead screw (22) is fixedly connected to the top of the adjusting spring (21). The upper end of the lead screw (22) passes through the top of the sliding sleeve (16) and is threadedly connected to the middle of the top of the sliding sleeve (16).

8. A sealing pressure reducing valve according to claim 7, characterized in that: A second guide pipe (24) is provided between the inside of the water inlet (2) and the inside of the flow control chamber (13). A first guide pipe (23) is provided between the upper part of the adjustment chamber (15) and the inside of the pressure reducing chamber (4). The first guide pipe (23) and the second guide pipe (24) are both located inside the valve body (1).

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