Corrosion-resistant chemical fluid pressure reducing valve

Abstract

The utility model discloses a corrosion-resistant chemical fluid pressure reducing valve, and relates to the technical field of fluid pressure reducing valves, the corrosion-resistant chemical fluid pressure reducing valve comprises a connecting assembly, a pressure reducing assembly and a protection assembly, the connecting assembly comprises a valve body and flanges, the flanges are fixedly connected to the two ends of the valve body, and the pressure reducing assembly comprises a threaded rod and a first spring; the first spring is movably connected to the bottom end of the threaded rod, the protection assembly is arranged in the connecting assembly and comprises a sealing body connecting rod and protection plugs, and the protection plugs are fixedly connected to the two ends of the sealing body connecting rod. Under the combined action of the valve cavity sealing body, the sealing body connecting rod and the protective plugs, when a medium passes through the channel, due to the fact that the protective plugs are arranged at the two ends of the sealing body connecting rod, the protective plugs are tightly matched with the valve cavity sealing body, the medium only exists in the channel, and the medium is prevented from invading into the valve body; the first spring, the second spring and threads are corroded, and the service life of the pressure reducing valve is shortened.

Description

Technical Field

[0001] This utility model relates to the field of fluid pressure reducing valve technology, specifically to a corrosion-resistant chemical fluid pressure reducing valve. Background Technology

[0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, and regulate and control the parameters, temperature, pressure, and flow rate of the conveyed medium. According to their functions, they can be divided into shut-off valves, check valves, and regulating valves. From the simplest gate valve to the various valves used in extremely complex automatic control systems, there are a wide variety of types and specifications. They are basic components of pipeline systems. Pressure reducing valves regulate the flow rate of the medium by controlling the opening degree of the opening and closing element in the valve body, reducing the pressure of the medium. At the same time, they use the downstream pressure to regulate the opening degree of the opening and closing element, so that the downstream pressure is maintained within a certain range. Even when the inlet pressure is constantly changing, the outlet pressure is kept within the set range.

[0003] However, current pressure reducing valves are susceptible to corrosion from corrosive media during use, causing varying degrees of corrosion inside the valve. This affects the normal operation of the pressure reducing valve, reduces its service life, and fails to meet the usage requirements. Furthermore, the complex structure of some pressure reducing valves makes disassembly and assembly difficult, hindering maintenance work.

[0004] To address this problem, this application provides a corrosion-resistant chemical fluid pressure reducing valve. Utility Model Content

[0005] The purpose of this utility model is to provide a corrosion-resistant chemical fluid pressure reducing valve to solve the problems mentioned in the background art, such as the corrosion caused by corrosive media during the use of the fluid pressure reducing valve, the complex structure of the pressure reducing valve and the difficulty of disassembly and assembly, which reduce the service life of many pressure reducing valves, make maintenance inconvenient, and result in poor performance.

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

[0007] A corrosion-resistant chemical fluid pressure reducing valve includes a connecting assembly, a pressure reducing assembly, and a protection assembly. The connecting assembly includes a valve body and a flange, with the flange fixedly connected to both ends of the valve body. The pressure reducing assembly is disposed inside the connecting assembly and includes a threaded rod and a spring, with the spring movably connected to the bottom end of the threaded rod. The protection assembly is disposed inside the connecting assembly and includes a sealing body connecting rod and a protective plug, with the protective plug fixedly connected to both ends of the sealing body connecting rod.

[0008] A further improvement of this utility model is that: a lower end cap is threadedly fixed to the bottom end of the valve body, and a fixing bolt is threadedly connected to the top end of the valve body.

[0009] A further improvement of the present invention is that: a threaded end cap is provided at the top of the valve body, an upper end cap is fixedly installed on the top of the threaded end cap, a spring is movably installed inside the threaded end cap, and a threaded rod is threadedly installed inside the threaded end cap.

[0010] A further improvement of this utility model is that: a valve cavity sealing body is provided inside the valve body, and a channel is opened inside the valve cavity sealing body.

[0011] A further improvement of this utility model is that: a switch handle is fixedly installed on the top of the threaded rod, and a second spring is movably installed on the bottom of the valve body, with the top of the second spring movably connected to the bottom of the sealing body connecting rod.

[0012] A further improvement of this utility model is that: the bottom of the spring is movably connected to the top of the sealing body connecting rod, the sealing body connecting rod is movably installed inside the valve cavity sealing body, and a sealing plug is fixedly installed on the outside of the sealing body connecting rod.

[0013] A further improvement of this utility model is that: a sealing gasket is provided inside the valve body, and pressure plates are fixedly installed at both ends of the sealing body connecting rod.

[0014] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0015] 1. This utility model provides a corrosion-resistant chemical fluid pressure reducing valve. Through the combined action of the valve cavity sealing body, the sealing body connecting rod and the protective plug, when the medium passes through the channel inside the valve cavity sealing body, the protective plugs at both ends of the sealing body connecting rod form a tight fit with the valve cavity sealing body, so that the medium exists only inside the channel, preventing the medium from entering the valve body and causing corrosion to the spring one, spring two and the threads, thus reducing the service life of the pressure reducing valve.

[0016] 2. This utility model provides a corrosion-resistant chemical fluid pressure reducing valve. With the combined action of the upper end cover, lower end cover and fixing bolts, when the pressure reducing valve needs maintenance after long-term operation, the lower end cover and upper end cover can be removed by tightening the fixing bolts, and the pressure reducing valve can be opened to inspect its internal structure. This makes disassembly and assembly relatively simple and facilitates the maintenance of the pressure reducing valve. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the corrosion-resistant chemical fluid pressure reducing valve of this utility model.

[0018] Figure 2 This is a schematic diagram of the installation structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the connecting component of this utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of this utility model.

[0021] In the diagram: 1. Connecting assembly; 2. Pressure reducing assembly; 3. Protection assembly; 10. Valve body; 11. Flange; 12. Lower end cover; 13. Threaded end cover; 14. Fixing bolt; 15. Valve cavity sealing body; 16. Channel; 17. Upper end cover; 20. Switch handle; 21. Threaded rod; 22. Spring 1; 23. Spring 2; 24. Sealing gasket; 30. Sealing body connecting rod; 31. Sealing plug; 32. Protective plug; 33. Pressure plate. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to embodiments:

[0023] like Figure 1-4 As shown, this utility model provides a corrosion-resistant chemical fluid pressure reducing valve, including a connecting assembly 1, a pressure reducing assembly 2, and a protection assembly 3. The connecting assembly 1 includes a valve body 10 and flanges 11. The flanges 11 are fixedly connected to both ends of the valve body 10, allowing the pressure reducing valve to be connected to a medium conveying pipeline via the flanges 11 at both ends of the valve body 10. A lower end cap 12 is threadedly fixed to the bottom end of the valve body 10, and a fixing bolt 14 is threadedly connected to the top end of the valve body 10. A threaded end cap 13 is provided at the top end of the valve body 10. The top of the valve is fixedly installed with an upper end cover 17. The valve body 10 is provided with a valve cavity sealing body 15. The valve cavity sealing body 15 has a channel 16 inside. When the pressure reducing valve needs to be repaired after long-term operation, the lower end cover 12 and the upper end cover 17 can be removed by turning the fixing bolt 14, and the pressure reducing valve can be opened to inspect its internal structure. The upper end cover 17, the lower end cover 12 and the fixing bolt 14 work together to make the disassembly and assembly of the pressure reducing valve relatively simple, which facilitates the maintenance of the pressure reducing valve.

[0024] like Figure 2-4As shown, the pressure-reducing assembly 2 is disposed inside the connecting assembly 1. The pressure-reducing assembly 2 includes a threaded rod 21 and a spring 22. The spring 22 is movably connected to the bottom end of the threaded rod 21 and is movably installed inside the threaded end cap 13. The threaded rod 21 is threadedly installed inside the threaded end cap 13. A switch handle 20 is fixedly installed on the top of the threaded rod 21. A second spring 23 is movably installed on the bottom of the valve body 10. A sealing gasket 24 is provided inside the valve body 10. By rotating the switch handle 20, the threaded rod 21 is rotated, causing the threaded rod 21 to rotate. When rod 21 moves downward, it presses spring 22 downward. Spring 22 then presses the pressure plate 33 and the sealing body connecting rod 30 downward, so that the sealing plug 31 on the sealing body connecting rod 30 no longer contacts the valve cavity sealing body 15, allowing the medium to pass through channel 16 for medium transport. When the valve is closed, spring 22 no longer applies pressure to the sealing body connecting rod 30. Spring 23 applies an upward elastic force to the pressure plate 33 and the sealing body connecting rod 30, so that the sealing plug 31 contacts the valve cavity sealing body 15, sealing the channel 16.

[0025] like Figure 2 and Figure 4 As shown, the protection component 3 is disposed inside the connecting component 1. The protection component 3 includes a sealing body connecting rod 30 and a protective plug 32. The protective plug 32 is fixedly connected to both ends of the sealing body connecting rod 30. The bottom of the sealing body connecting rod 30 is movably connected to the top of the second spring 23, and the bottom of the first spring 22 is movably connected to the top of the sealing body connecting rod 30. The sealing body connecting rod 30 is movably installed inside the valve cavity sealing body 15. A sealing plug 31 is fixedly installed on the outside of the sealing body connecting rod 30. Pressure plates 33 are fixedly installed at both ends of the sealing body connecting rod 30. When the medium passes through the channel 16 inside the valve cavity sealing body 15, the protective plugs 32 at both ends of the sealing body connecting rod 30 form a tight fit with the valve cavity sealing body 15, so that the medium exists only inside the channel 16, preventing the medium from entering the valve body 10. Through the combined action of the valve cavity sealing body 15, the sealing body connecting rod 30 and the protective plug 32, the medium is prevented from corroding the first spring 22, the second spring 23 and the threads, thus improving the working life of the pressure reducing valve.

[0026] The working principle of this corrosion-resistant chemical fluid pressure reducing valve will be explained in detail below.

[0027] like Figure 1-4As shown, when using this corrosion-resistant chemical fluid pressure reducing valve, the valve is connected to the medium conveying pipeline via flanges 11 at both ends of the valve body 10. Rotating the switch handle 20 rotates the threaded rod 21, causing it to move downwards and compress the spring 22. The spring 22 then compresses the pressure plate 33 and the sealing body connecting rod 30, causing the sealing plug 31 on the sealing body connecting rod 30 to no longer contact the valve cavity sealing body 15, allowing the medium to pass through the channel 16 for transport. When the valve is closed, the spring 22 no longer applies pressure to the sealing body connecting rod 30, and the spring 23 applies an upward elastic force to the pressure plate 33 and the sealing body connecting rod 30, causing the sealing plug 31 to contact the valve cavity sealing body 15, sealing the channel 16. When the medium passes through the inside of the valve cavity sealing body 15... When channel 16 is used, protective plugs 32 are present at both ends of the sealing body connecting rod 30. The protective plugs 32 form a tight fit with the valve cavity sealing body 15, so that the medium exists only inside the channel 16, preventing the medium from entering the valve body 10. Under the combined action of the valve cavity sealing body 15, the sealing body connecting rod 30 and the protective plugs 32, the medium is prevented from corroding the spring 22, the spring 23 and the threads, thus improving the service life of the pressure reducing valve. When the pressure reducing valve needs to be repaired after long-term operation, the lower end cover 12 and the upper end cover 17 can be removed by turning the fixing bolt 14, and the pressure reducing valve can be opened to inspect its internal structure. Under the combined action of the upper end cover 17, the lower end cover 12 and the fixing bolt 14, the disassembly and assembly of the pressure reducing valve is relatively simple, which facilitates the maintenance of the pressure reducing valve.

[0028] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A corrosion resistant chemical fluid pressure reducing valve comprising a connection assembly (1), a pressure reducing assembly (2) and a protection assembly (3), characterized in that: The connecting assembly (1) comprises a valve body (10) and flanges (11) fixedly connected at both ends of the valve body (10), the pressure reducing assembly (2) is arranged inside the connecting assembly (1), the pressure reducing assembly (2) comprises a threaded rod (21) and a spring (22), the spring (22) is movably connected at the bottom end of the threaded rod (21), the protection assembly (3) is arranged inside the connecting assembly (1), the protection assembly (3) comprises a sealing body connecting rod (30) and a protection plug (32), the protection plug (32) is fixedly connected at both ends of the sealing body connecting rod (30).

2. A corrosion resistant chemical fluid pressure reducing valve as defined in claim 1 wherein: The bottom end of the valve body (10) is fixedly screwed to a lower end cover (12), and the top end of the valve body (10) is threadedly connected with a fixing bolt (14).

3. A corrosion resistant chemical fluid pressure reducing valve as defined in claim 1 wherein: The top end of the valve body (10) is provided with a threaded end cover (13), the top of the threaded end cover (13) is fixedly provided with an upper end cover (17), the spring (22) is movably arranged inside the threaded end cover (13), and the threaded rod (21) is threadedly arranged inside the threaded end cover (13).

4. A corrosion resistant chemical fluid pressure reducing valve as defined in claim 1 wherein: The inside of the valve body (10) is provided with a valve cavity sealing body (15), and the inside of the valve cavity sealing body (15) is provided with a channel (16).

5. A corrosion resistant chemical fluid pressure reducing valve as defined in claim 1 wherein: The top of the threaded rod (21) is fixedly provided with a switch handle (20), the bottom of the valve body (10) is movably provided with a spring (23), and the top of the spring (23) is movably connected with the bottom of the sealing body connecting rod (30).

6. A corrosion resistant chemical fluid pressure reducing valve as defined in claim 3 wherein: The bottom of the spring (22) is movably connected with the top of the sealing body connecting rod (30), the sealing body connecting rod (30) is movably arranged inside the valve cavity sealing body (15), and the sealing body connecting rod (30) is fixedly provided with a sealing plug (31) outside.

7. A corrosion resistant chemical fluid pressure reducing valve as defined in claim 1 wherein: The inside of the valve body (10) is provided with a sealing gasket (24), and both ends of the sealing body connecting rod (30) are fixedly provided with pressure receiving plates (33).

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