Constant pressure reducing valve

Abstract

The constant-pressure reducing valve comprises a valve body, a piston, a spring, a valve element assembly, a gasket and a sealing ring, the valve body comprises a valve upper cover, a valve seat and a valve base, the piston and the spring are located in inner cavities of the valve upper cover and the valve seat, the valve element assembly is located in inner cavities of the valve seat and the valve base, and the gasket and the sealing ring are arranged on the piston and the valve element assembly respectively. Compared with the prior art, the constant-pressure reducing valve has the advantages that the valve element assembly is additionally arranged on the basis of a spring and a piston constant-pressure original part of a traditional constant-pressure reducing valve, constant-pressure operation actions are distributed at the top and the bottom of the valve body respectively, the overall working efficiency is improved, constant-pressure precision is provided, and the constant-pressure reducing valve is suitable for large-scale popularization and application. And the pressure error is controlled within 0.1 MPa.

Description

Technical Field

[0001] This utility model relates to a valve, specifically, to an air constant pressure reducing valve. Background Technology

[0002] Valves are control components in fluid transport systems, possessing functions such as shut-off, regulation, flow diversion, backflow prevention, pressure stabilization, flow splitting, and pressure relief. From the simplest shut-off valves to the various valves used in highly complex automated control systems, there is a wide variety of types and specifications. Valves can be used to control the flow of various types of fluids, including air, water, steam, various corrosive media, slurry, oil, liquid metals, and radioactive media.

[0003] Constant pressure reducing valves have a wide range of applications, used for reducing the pressure of high-pressure gases, such as oxygen and compressed air. They are particularly useful in specialized industries requiring high precision and efficient, stable operation.

[0004] In the existing gas constant pressure reducing valve technology, constant pressure operation is achieved through the cooperation of piston and spring. This structure has a large constant pressure range and low accuracy. Utility Model Content

[0005] To address the shortcomings of existing designs, the purpose of this utility model is to provide a constant pressure reducing valve. By optimizing the structure, the overall structure is stabilized, the constant pressure effect is improved, and the applicability of the product is broadened.

[0006] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows:

[0007] A constant pressure reducing valve includes a valve body, a piston, a spring, a gasket, a disc, and a sealing ring. The valve body includes a valve cover, a valve seat, and a valve base. The piston and spring are located inside the valve cover and the valve seat. The valve body also includes a valve core assembly located inside the valve seat and the valve base. The valve core assembly includes a pin and a disc. The discs are nested and stacked on the outer wall of the pin. The discs are annular sheet-like structures with arc surfaces, and adjacent discs on the pin are distributed opposite to each other. The gasket and the sealing ring are respectively installed on the piston and the valve core assembly.

[0008] Preferably, the valve seat has a mounting groove I for mounting a piston in the top inner cavity and a mounting groove II for mounting a valve core assembly in the bottom inner cavity. The mounting groove I and the mounting groove II are a through hollow structure, and the top and bottom are under constant pressure to ensure constant pressure stability.

[0009] Preferably, the outer wall of the top of the valve seat is fixedly connected to the valve cover by screwing, and the outer wall of the bottom of the valve seat is fixedly connected to the valve base by screwing. The screwing method is simple in structure and easy to implement.

[0010] Preferably, the sealing rings include sealing ring I, sealing ring II, sealing ring III and sealing ring IV. The use of multiple sets of sealing rings ensures the stability of the overall seal and improves the performance.

[0011] Preferably, sealing ring I is nested on the top of the piston and abuts against the inner wall of the valve cover, sealing ring II is nested on the bottom of the piston and abuts against the inner wall of the valve seat, sealing ring III is located between the outer wall of the bottom of the valve seat and the outer wall of the valve base, and sealing ring IV is nested on the ejector pin and abuts against the inner wall of the mounting groove II. Each component uses a sealing ring structure at the connection point to improve the sealing effect.

[0012] Preferably, the gasket includes gasket I and gasket II. Gasket I is located at the bottom end of the piston, and gasket II is located between the disc and the sealing ring IV. The gaskets play a role in preventing wear and cushioning, thereby increasing the service life of the product.

[0013] Preferably, the gas inlet is located at the end of the valve base, and the gas outlet is located on the side wall of the valve base, which are the inlet and outlet for air flow.

[0014] Preferably, the piston cavity has a hollow channel I, and the ejector pin cavity has a hollow channel II, with the two channels pointing to two constant pressure working paths respectively.

[0015] Compared with the prior art, the beneficial effects of this utility model are: based on the traditional constant pressure reducing valve with spring and piston constant pressure components, a valve core assembly is added, which distributes the constant pressure operation action to the top and bottom of the valve body respectively, improving the overall working efficiency and providing constant pressure accuracy, controlling the pressure error within 0.1MPa. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a preferred embodiment of a constant pressure valve provided by this utility model;

[0017] Figure 2 This is a schematic diagram of a preferred embodiment of a constant pressure valve provided by this utility model;

[0018] Figure 3 This is a schematic diagram of a preferred embodiment of a constant pressure valve provided by this utility model. Detailed Implementation

[0019] The present invention will now be described in further detail and in completeness with reference to the accompanying drawings and preferred embodiments.

[0020] Figure 1-3 This is a schematic diagram of a preferred embodiment of a constant pressure reducing valve provided by this utility model. (See diagram below.) Figure 1-3As shown, the constant pressure valve includes a valve body 1, a piston 2, a spring 3, a gasket 4, and a sealing ring 5. The valve body 1 includes a valve cover 101, a valve seat 102, and a valve base 103. The piston 2 and spring 3 are located inside the valve cover 101 and the valve seat 102. The valve body also includes a valve core assembly 6, located inside the valve seat 102 and the valve base 103. The valve core assembly 6 includes a pin 601 and a disc 602. The disc 602 is nested and stacked on the outer wall of the pin 601. The valve seat 102 is a ring-shaped plate structure with an arc surface. Adjacent discs on the ejector pin 601 are distributed opposite each other. Gasket 602 and sealing ring 5 are respectively installed on piston 2 and valve core assembly 6. The top inner cavity of valve seat 102 has a mounting groove I 104 for installing piston 2, and the bottom inner cavity of valve seat 102 has a mounting groove II 105 for installing valve core assembly 6. The mounting groove I 104 and mounting groove II 105 are a through hollow structure. The top outer wall of valve seat 102 is fixed to valve cover 101 by screwing. The valve seat 102 is fixedly connected to the valve base 103 by a screw connection. The sealing ring 5 includes sealing ring I 501, sealing ring II 502, sealing ring III 503, and sealing ring IV 504. Sealing ring I 501 is nested on the top of the piston 2 and abuts against the inner wall of the valve cover 101. Sealing ring II 502 is nested on the bottom of the piston 2 and abuts against the inner wall of the valve seat 102. Sealing ring III 503 is located between the bottom outer wall of the valve seat 102 and the outer wall of the valve base 103, forming a seal. Ring IV 504 is nested on the ejector pin 601 and abuts against the inner wall of the mounting groove II 105. Gasket 4 includes gasket I 401 and gasket II 402. Gasket I 401 is located at the bottom end of piston 2, and gasket II 402 is located between disc 602 and sealing ring IV 504. Gas inlet 106 is located at the end of valve base 103, and gas outlet 107 is located on the side wall of valve base 102. The inner cavity of piston 2 is provided with hollow channel I 108, and the inner cavity of ejector pin 601 is provided with hollow channel II 109.

[0021] In actual use, air enters from the gas inlet 106 at the end of the valve base 103. At this time, the inflowing gas pressure is relatively high. When the high-pressure gas enters the inner cavity of the valve base 102, it is divided into three paths. The first path enters the inner cavity of the piston 2 through channel I 108. The second path enters the inner cavity of the ejector pin 601 through channel II 109. The third path is discharged from the gas outlet 109 on the side wall of the valve base 102. Under the action of pressure, the high-pressure air reacts against the valve cover 101, pushing the piston 2 downward. At the same time, the compression spring 3 releases pressure. In addition, under the action of pressure, the high-pressure air reacts against the valve base 103, pushing the ejector pin 601 upward. Under the combined action of the disc 602, pressure is released. As the pressure gradually decreases, the compression spring 3 and the disc 602 return to their original positions, thereby ensuring that the gas pressure from the gas outlet is stable.

[0022] Compared with the prior art, the beneficial effects of this utility model are: based on the traditional constant pressure valve with spring and piston constant pressure components, a valve core assembly is added, which distributes the constant pressure operation action to the top and bottom of the valve body respectively, improving the overall working efficiency and providing constant pressure accuracy, controlling the pressure error within 0.1MPa.

[0023] Finally, it is necessary to state that the above embodiments are only used to further illustrate the technical solution of this utility model in detail, and should not be construed as limiting the scope of protection of this utility model. Any non-essential improvements and adjustments made by those skilled in the art based on the above content of this utility model shall fall within the scope of protection of this utility model.

Claims

1. A constant pressure reducing valve, comprising a valve body, a piston, a spring, a gasket, and a sealing ring, wherein the valve body includes a valve cover, a valve seat, and a valve base, and the piston and spring are located within the inner cavities of the valve cover and the valve seat, characterized in that: It also includes a valve core assembly, which is located in the inner cavity of the valve seat and valve base. The valve core assembly includes a ejector pin and a disc, with the disc nested and stacked on the outer wall of the ejector pin. The disc is an annular plate-shaped structure with an arc surface, and adjacent discs on the ejector pin are distributed relative to each other. Gaskets and sealing rings are respectively installed on the piston and the valve core assembly.

2. The constant pressure reducing valve according to claim 1, characterized in that: The valve seat has a mounting groove I at the top of the inner cavity for mounting the piston, and a mounting groove II at the bottom of the inner cavity for mounting the valve core assembly. The mounting groove I and the mounting groove II are connected by a hollow structure.

3. The constant pressure reducing valve according to claim 1, characterized in that: The top outer wall of the valve seat is fixedly connected to the valve cover by a threaded connection, and the bottom outer wall of the valve seat is fixedly connected to the valve base by a screw connection.

4. A constant pressure reducing valve according to claim 1, characterized in that: The sealing rings include sealing ring I, sealing ring II, sealing ring III, and sealing ring IV.

5. A constant pressure reducing valve according to claim 4, characterized in that: Sealing ring I is nested on the top of the piston and abuts against the inner wall of the valve cover; sealing ring II is nested on the bottom of the piston and abuts against the inner wall of the valve seat; sealing ring III is located between the outer wall of the bottom of the valve seat and the outer wall of the valve base; and sealing ring IV is nested on the ejector pin and abuts against the inner wall of the mounting groove II.

6. A constant pressure reducing valve according to claim 1, characterized in that: The gaskets include gasket I and gasket II. Gasket I is located at the bottom end of the piston, and gasket II is located between the disc and the sealing ring IV.

7. A constant pressure reducing valve according to claim 1, characterized in that: The gas inlet is located at the end of the valve base, and the gas outlet is located on the side wall of the valve base.

8. A constant pressure reducing valve according to claim 1, characterized in that: The piston cavity has a hollow channel I, and the ejector pin cavity has a hollow channel II.

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