Pressure reducing valve structure

Abstract

A pressure reducing valve structure is characterized in that a valve body is cylindrical, a bush C is mounted in the valve body, oil through holes are uniformly distributed in the bush C corresponding to an output port and a process hole channel, one end of a piston is mounted in the bush C, the other end of the piston is mounted in a bush B, a sealing ring and a protection ring A are arranged at the matching position of the piston and the bush B, and the bush B is in contact with the end face of the bush C; oil through holes which are uniformly distributed are formed in the bushing B and are communicated with the oil inlet, a sealing ring and a protection ring B are arranged at the matching part of the valve body and the bushing B, and the matching part is positioned on the two sides of the oil inlet; the lining A is in threaded connection with the valve body, the right end face of the lining A makes contact with the lining B, the pressure adjusting rod is installed in the lining A through threads, a spring seat A and a spring seat B which are used for supporting the spring are arranged in the lining A, the spring seat A abuts against the pressure adjusting rod, the spring seat B abuts against the piston, and a locking nut used for locking is arranged on the pressure adjusting rod through threads. The pressure at the output port is adjusted through the pressure adjusting rod to be stable.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure reducing valves, and in particular to a pressure reducing valve structure. Background Art

[0002] A pressure reducing valve is a valve that reduces the inlet pressure to a required outlet pressure by adjusting the spring force, and relies on the energy of the medium itself to automatically maintain a stable outlet pressure. However, changes in flow rate and inlet pressure will affect the stability of the pressure reducing valve's outlet pressure. The outlet pressure of existing pressure reducing valves fluctuates greatly due to the influence of flow rate and inlet pressure, which easily leads to the problem of unstable pressure reducing valve outlet pressure. Summary of the Invention

[0003] In order to solve the problems mentioned in the above background technology, the present invention provides a pressure reducing valve structure.

[0004] The present invention discloses the following technical solution: a pressure reducing valve structure, including a pressure regulating rod, a locking nut, a bushing A, a spring, a valve body, a bushing C, a piston and a bushing B, wherein the valve body is cylindrical, and is provided with an oil inlet and an output port, and the oil inlet and the output port are respectively installed with pipe joints, and the valve body is provided with two process holes connected to the output port, and the process holes are installed with hexagonal head screw plugs, and the bushing C is installed inside the valve body, and the bushing C is provided with uniformly distributed oil holes relative to the output port and the process hole channel, and one end of the piston is installed inside the bushing C, and the other end is installed inside the bushing B, and the piston and the bushing C cooperate. A sealing ring is provided, and a sealing ring and a protective ring A are provided at the fitting place between the piston and the bushing B. The bushing B contacts the end face of the bushing C, and the bushing B is provided with evenly distributed oil holes connected to the oil inlet. A sealing ring and a protective ring B are provided at the fitting place between the valve body and the bushing B, and the fitting place is located on both sides of the oil inlet; the bushing A is threadedly connected to the valve body, and the right end face of the bushing A contacts the bushing B, and the pressure regulating rod is installed in the bushing A through threads, and a spring seat A and a spring seat B for supporting the spring are provided inside the bushing A, the spring seat A abuts the pressure regulating rod, and the spring seat B abuts the piston, and a locking nut for locking is provided on the pressure regulating rod through threads.

[0005] Furthermore, a sealing ring is provided at the fitting position between the hexagonal head screw plug and the valve body.

[0006] Furthermore, a sealing ring is provided between the pipe joint and the valve body.

[0007] Furthermore, a sealing ring is provided at the fitting position between the valve body and the bushing C, and the fitting position is located on both sides of the output port.

[0008] Beneficial effects: Compared with the prior art, the pressure reducing valve structure of the present invention adjusts the elastic force of the spring to be equal to the required pressure reducing pressure by setting the pressure regulating rod. When the system pressure is input or disconnected at the oil inlet of the pressure reducing valve, the pressure at the output port of the pressure reducing valve can maintain a stable pressure reducing pressure, effectively solving the problem of unstable pressure at the outlet of the pressure reducing valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the present invention; In the figure: 1-pressure regulating rod, 2-locking nut, 3-bushing A, 4-spring seat A, 5-spring, 6-valve body, 7-spring seat B, 8-pipe joint, 9-hexagonal head plug, 10-bushing C, 11-protection ring A, 12-piston, 13-protection ring B, 14-bushing B. DETAILED DESCRIPTION

[0010] The “left” and “right” in the following description refer to the directions of fitting of components in the accompanying drawings, and are not limitations on the technical solution.

[0011] like Figure 1As shown, a pressure reducing valve structure includes a pressure regulating rod 1, a locking nut 2, a bushing A3, a spring 5, a valve body 6, a bushing C10, a piston 12 and a bushing B14. The valve body 6 is cylindrical and is provided with an oil inlet and an output port. The oil inlet and the output port are respectively installed with pipe joints 8. A sealing ring is provided between the pipe joint 8 and the valve body 6 to prevent oil leakage from the pipe joint 8. The valve body 6 has two process holes connected to the output port. The process holes are installed with hexagonal head screw plugs 9 to prevent oil from leaking from the process The hole leaks, the hexagonal head screw plug 9 is equipped with a sealing ring at the joint with the valve body 6 to prevent oil leakage at the process hole, the bushing C10 is installed inside the valve body 6, and the bushing C10 is provided with evenly distributed oil holes relative to the output port and the process hole channel, the valve body 6 and the bushing C10 are equipped with a sealing ring at the joint, and the joint is located on both sides of the output port to improve the sealing performance, one end of the piston 12 is installed inside the bushing C10, and the other end is installed inside the bushing B14, and the piston 12 is equipped with a sealing ring at the joint with the bushing C10. A sealing ring and a protective ring A11 are provided at the fitting place between the piston 12 and the bushing B14. The bushing B14 contacts the end face of the bushing C10. The bushing B14 is provided with evenly distributed oil holes connected to the oil inlet. A sealing ring and a protective ring B13 are provided at the fitting place between the valve body 6 and the bushing B14. The fitting place is located on both sides of the oil inlet; the bushing A3 is threadedly connected to the valve body 6, and the right end face of the bushing A3 contacts the bushing B14. The pressure-regulating rod 1 is installed in the bushing A3 through threads. A spring seat A4 and a spring seat B7 for supporting the spring 5 are provided inside the bushing A3. The spring seat A4 abuts the pressure-regulating rod 1, and the spring seat B7 abuts the piston 12. A locking nut 2 for locking is provided on the pressure-regulating rod 1 through threads. The locking nut 2 abuts the end face of the bushing A3 to prevent the pressure-regulating rod 1 from loosening. The pressure at the output port is adjusted by the pressure-regulating rod 1.

[0012] During use, adjust the screwing length of the pressure-regulating rod 1 and the bushing A3, compress the spring 5 through the spring seat A4 to preset its elastic force equal to the required reduced pressure, input the system pressure to the oil inlet through the pipe joint 8, and the oil passes through the valve formed by the piston 12 and the bushing B14. The pressure at the outlet reacts on the piston 12 to adjust the valve opening. When the hydraulic pressure of the piston 12 is equal to the preset elastic force of the spring 5, the valve closes and the pressure at the outlet remains at a stable reduced pressure. When the pressure at the oil inlet is disconnected, the valve cannot be opened because the hydraulic pressure of the piston 12 is equal to the preset elastic force of the spring 5. The pressure at the outlet can also remain at a stable reduced pressure, thus solving the problem of unstable pressure at the outlet of the pressure reducing valve.

[0013] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A pressure reducing valve structure, comprising a pressure regulating rod (1), a locking nut (2), a bushing A (3), a spring (5), a valve body (6), a bushing C (10), a piston (12) and a bushing B (14), characterized in that: The valve body (6) is cylindrical, and is provided with an oil inlet and an outlet on the valve body (6). The oil inlet and the outlet are respectively provided with pipe joints (8). The valve body (6) is provided with two process holes connected to the outlet, and the process holes are provided with hexagonal screw plugs (9). The bushing C (10) is installed inside the valve body (6). The bushing C (10) is provided with uniformly distributed oil holes relative to the outlet and the process hole passage. One end of the piston (12) is installed inside the bushing C (10) and the other end is installed inside the bushing B (14). A sealing ring is provided at the fitting place between the piston (12) and the bushing C (10). A sealing ring and a protective ring A (11) are provided at the fitting place between the piston (12) and the bushing B (14). The bushing B (14) is provided with a sealing ring. ) contacts the end face of bushing C (10), bushing B (14) is provided with evenly distributed oil holes connected to the oil inlet, and a sealing ring and a protective ring B (13) are provided at the fitting position of the valve body (6) and bushing B (14), and the fitting position is located on both sides of the oil inlet; the bushing A (3) is threadedly connected to the valve body (6), and the right end face of the bushing A (3) contacts the bushing B (14), and the pressure regulating rod (1) is installed in the bushing A (3) through a thread, and a spring seat A (4) and a spring seat B (7) for supporting the spring (5) are provided inside the bushing A (3), the spring seat A (4) abuts against the pressure regulating rod (1), and the spring seat B (7) abuts against the piston (12), and a locking nut (2) for locking is provided on the pressure regulating rod (1) through a thread.

2. The pressure reducing valve structure according to claim 1, characterized in that: A sealing ring is provided at the joint between the hexagonal screw plug (9) and the valve body (6).

3. The pressure reducing valve structure according to claim 1, characterized in that: A sealing ring is provided between the pipe joint (8) and the valve body (6).

4. The pressure reducing valve structure according to claim 1, characterized in that: A sealing ring is provided at the fitting position between the valve body (6) and the bushing C (10), and the fitting position is located on both sides of the output port.

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