Pilot-operated pressure regulating valve structure

Abstract

The utility model discloses a pilot-operated type pressure regulating valve structure which comprises a pilot valve, a main valve, a three-way control valve and a fixing seat, a valve body of the pilot valve and a valve body of the three-way control valve are both fixedly installed on the fixing seat and installed on the main valve through the fixing seat, the three-way control valve is provided with four connectors, and the connectors are connected with the main valve. The first connector, the second connector, the third connector and the fourth connector are connected with the pilot valve, the third connector penetrates through the fixing base downwards to be connected with the piston upper cavity of the main valve, and the fourth connector is communicated with the atmosphere. Compared with the scheme in the prior art, the pilot-operated type pressure regulating valve structure has the advantages that through the integral arrangement of the three-way control valve and the pilot-operated valve, the main valve can effectively simplify connecting pipelines among the three-way control valve, the pilot-operated valve and the main valve.

Description

Technical Field

[0001] This utility model relates to a pilot-operated pressure regulating valve, and more specifically to a pilot-operated pressure regulating valve structure. Background Technology

[0002] A pressure sustaining valve, also known as a "pressure sustaining and relief valve" or "pressure maintaining valve," is a valve used to maintain the system pressure below a set upper limit. Its core function is to automatically open and release excess fluid (pressure relief) when the system pressure exceeds the set value, allowing the pressure to drop to a safe range; and to automatically close when the pressure falls below the set value, preventing further fluid outflow and thus maintaining the system pressure within a stable range. A pressure reducing valve, on the other hand, stably reduces a higher inlet pressure to a preset outlet pressure, maintaining a stable outlet pressure regardless of changes in inlet pressure or flow rate (within the pressure regulating range). Therefore, both pressure sustaining valves and pressure reducing valves are types of pressure regulating valves, primarily used to control the fluid pressure at the inlet or outlet. Consequently, their valve body structures are quite similar. Similar to other valves, they all use a combination of a pilot valve, a three-way control valve, and a main valve. The pilot valve and the three-way control valve control the flow of media such as air and water into the upper chamber of the main valve piston to control the action of the main valve. Currently, the connection method between the pilot valve, the three-way control valve, and the main valve is as follows: the valve body of the pilot valve and the valve body of the three-way control valve are separate structures, and their internal spaces are not connected. Then, the various ports of the pilot valve and the three-way control valve are connected to the various ports of the main valve through pipelines. However, due to the large number of connection ports between the pilot valve, the three-way control valve, and the main valve, there will be a lot of connecting pipelines. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a pressure valve structure that can effectively simplify the connection pipeline.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a pressure valve structure, including a pilot valve, a main valve, a three-way control valve, and a fixed seat. The valve bodies of the pilot valve and the three-way control valve are both fixedly mounted on the fixed seat and installed on the main valve through the fixed seat. The three-way control valve has a first interface, a second interface, a third interface, and a fourth interface. The first and second interfaces are connected to the pilot valve, the third interface passes downward through the fixed seat and connects to the upper chamber of the piston of the main valve, and the fourth interface is open to the atmosphere.

[0005] As a further improvement of this utility model, the main valve body is provided with an inlet and an outlet on its side, and the pilot valve body is provided with a fifth interface, a sixth interface, and a vent interface. The fifth interface, the sixth interface, the inlet, and the outlet are located on the same side of the main valve.

[0006] As a further improvement of this utility model, the valve body of the pilot valve is fixed with a cover by bolts, and the fifth interface and the sixth interface are provided on the cover.

[0007] As a further improvement of this utility model, when the pressure valve is a pressure reducing valve, the fifth interface is connected to the water inlet through a pipe, the sixth interface is connected to the water outlet through a pipe, and the vent interface is connected to the atmosphere.

[0008] As a further improvement of this utility model, when the pressure valve is a pressure-holding valve, the fifth port is connected to the atmosphere, the sixth port is connected to the water inlet through a pipe, the water outlet is blocked, and the venting port is blocked.

[0009] The beneficial effects of this utility model are as follows: Compared with the existing connection methods of pilot valves, three-way control valves, and main valves in the background art, this utility model uses a fixed seat to integrally install the pilot valve and three-way control valve onto the main valve, changing the previous mode of connecting the pilot valve, three-way control valve, and main valve body through numerous pipe connection interfaces. This design effectively reduces the number of connecting pipes, avoids the problem of numerous connecting interfaces leading to a large number of connecting pipes, and makes the entire pressure valve structure simpler and more compact. It not only reduces installation complexity and the risk of leakage that may occur due to numerous pipes, but also makes maintenance more convenient, improving the reliability and maintainability of the pressure valve. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the pressure-holding valve structure of this utility model;

[0011] Figure 2 This is a structural schematic diagram of the pressure-holding valve of this utility model from another perspective;

[0012] Figure 3 This is a schematic diagram of the pressure reducing valve structure of this utility model;

[0013] Figure 4 This is a structural schematic diagram of the pressure reducing valve of this utility model from another perspective;

[0014] Figure 5 This is a structural diagram of the pilot valve and the three-way control valve.

[0015] Figure 6 for Figure 5 A schematic diagram of the pilot valve and three-way control valve from another perspective;

[0016] Figure 7 This is a schematic diagram of the pilot valve.

[0017] Figure 8 This is a schematic diagram of a three-way control valve. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the embodiments shown in the accompanying drawings.

[0019] Reference Figure 1 as well as Figure 3 as well as Figure 7 and Figure 8 As shown, a pressure valve structure in this embodiment includes a pilot valve 1, a main valve 2, a three-way control valve 3, and a fixed seat 4. The valve bodies of the pilot valve 1 and the three-way control valve 3 are both fixedly mounted on the fixed seat 4 and then mounted onto the main valve 2 via the fixed seat 4. The three-way control valve 3 has a first port 31, a second port 32, a third port 33, and a fourth port 34. The first port 31 and the second port 32 are connected to the pilot valve 1. The third port 33 passes downward through the fixed seat 4 and connects to the upper chamber of the piston of the main valve 2. The fourth port 34 is open to the atmosphere. This design of the three-way control valve 3... This design allows the pilot valve 1 and the three-way control valve 3 to be installed on the upper end of the main valve 2, forming a third interface 33 that connects to the upper chamber of the piston of the main valve 2. The first interface 31 and the second interface 32 are connected to the pilot valve 1 by bolts through an integral molding process. Compared with the existing connection methods, this reduces the number of pipes used for connection and lowers the complexity of the connection pipes. Based on the first interface 31 and the second interface 32 of the three-way control valve 3, the pilot valve 1 is provided with a corresponding interface that directly connects to the first interface 31 and the second interface 32, thereby eliminating the need for connecting pipes.

[0020] As an improved specific implementation, the main valve 2 has an inlet 21 and an outlet 22 on its side. The pilot valve 1 has a fifth interface 11, a sixth interface 12, and a vent interface 13 on its body. The fifth interface 11 and the sixth interface 12, the inlet 21 and the outlet 22 are located on the same side of the main valve 2. This same-side design allows for shorter connecting pipes between the inlet 21 and the outlet 22 and the fifth interface 11 and the sixth interface 12, and the connected structure is more intuitive. Figure 2 and Figure 4 as well as Figure 5 and Figure 6 As shown, by setting the vent 13 to the side opposite to the fifth port 11 and the sixth port 12, it is possible to avoid affecting the fifth port 11 and the sixth port 12, and at the same time, it will not increase the complexity of the connecting pipes.

[0021] As an improved specific implementation, the valve body of the pilot valve 1 is fixed with a cover 5 by bolts. The fifth interface 11 and the sixth interface 12 are set on the cover 5. By using the cover 5 to install the fifth interface 11 and the sixth interface 12, the fifth interface 11 and the sixth interface 12 can be easily disassembled and assembled. When applied to a pressure reducing valve or a pressure sustaining valve, the connecting flow channels of the fifth interface 11 and the sixth interface 12 can be changed without modifying the valve body structure, thus achieving the consistency of the valve body for pressure reducing valves and pressure sustaining valves.

[0022] In this embodiment, when the pressure valve is a pressure reducing valve, the fifth port 11 is connected to the inlet 21 through a pipe, the sixth port 12 is connected to the outlet 22 through a pipe, and the vent port 13 is connected to the atmosphere, thereby realizing the pressure reduction operation of the medium in the pipeline.

[0023] In this embodiment, when the pressure valve is a pressure-holding valve, the cover 5 is rotated 180 degrees and installed so that the fifth port 11 is connected to the atmosphere, the sixth port 12 is connected to the inlet 21 through a pipe, the outlet 22 is blocked, and the vent port 13 is blocked, thereby realizing the pressure holding operation of the medium in the pipeline.

[0024] In summary, the pressure valve structure of this embodiment adopts an integrated configuration of pilot valve 1 and three-way control valve 3, which simplifies the pipeline connection structure between pilot valve 1, three-way control valve 3 and main valve 2.

[0025] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A pilot-operated pressure regulating valve structure, characterized in that: The system includes a pilot valve (1), a main valve (2), a three-way control valve (3), and a fixed seat (4). The valve bodies of the pilot valve (1) and the three-way control valve (3) are fixedly mounted on the fixed seat (4) and installed on the main valve (2) through the fixed seat (4). The three-way control valve (3) has a first interface (31), a second interface (32), a third interface (33), and a fourth interface (34). The first interface (31) and the second interface (32) are connected to the pilot valve (1), the third interface (33) passes downward through the fixed seat (4) and is connected to the upper chamber of the piston of the main valve (2), and the fourth interface (34) is connected to the atmosphere.

2. The pilot-operated pressure regulating valve structure according to claim 1, characterized in that: The main valve (2) has an inlet (21) and an outlet (22) on the side of its valve body. The pilot valve (1) has a fifth interface (11), a sixth interface (12), and a vent interface (13) on its valve body. The fifth interface (11), the sixth interface (12), the inlet (21), and the outlet (22) are located on the same side of the main valve (2).

3. The pilot-operated pressure regulating valve structure according to claim 2, characterized in that: The pilot valve (1) has a cover (5) fixed to the side of the valve body by bolts, and the fifth interface (11) and the sixth interface (12) are set on the cover (5).

4. The pilot-operated pressure regulating valve structure according to claim 2 or 3, characterized in that: The pressure valve is a pressure reducing valve. The fifth port (11) is connected to the inlet (21) through a pipe, the sixth port (12) is connected to the outlet (22) through a pipe, and the vent port (13) is connected to the atmosphere.

5. The pilot-operated pressure regulating valve structure according to claim 2 or 3, characterized in that: The pressure valve is a pressure sustaining valve. The fifth port (11) is connected to the atmosphere, the sixth port (12) is connected to the inlet (21) through a pipe, the outlet (22) is blocked, and the venting port (13) is blocked.

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