A precision pressure reducing valve

Abstract

This utility model relates to the field of valve technology, and in particular to a precision pressure reducing valve, including a valve body, a fluid channel provided in the valve body, a valve seat provided on the fluid channel, a valve cover provided on the valve body, a valve plate provided in the valve body that cooperates with the valve seat, a valve stem fixedly connected to the valve plate by means of an opening and closing device on the valve cover, and a filter device for filtering impurities in the fluid provided on the valve body.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a precision pressure reducing valve. Background Technology

[0002] A pressure reducing valve is a valve that reduces the inlet pressure to a desired outlet pressure by adjusting the pressure and relies on the energy of the medium itself to automatically maintain a stable outlet pressure. It is generally installed in water pipelines and has the function of improving system flow distribution, system layout and operating conditions. It mainly moves the valve stem and valve plate by moving the diaphragm. The diaphragm is one of its main components. However, in actual use, the diaphragm is easily affected by impurities, which can cause it to wear and age quickly, affecting its service life. Utility Model Content

[0003] Therefore, in view of the above problems, this utility model proposes a precision pressure reducing valve.

[0004] To achieve the above objectives, the present invention provides a precision pressure reducing valve, comprising a valve body, a fluid channel within the valve body, a valve seat on the fluid channel, a valve cover on the valve body, a valve plate within the valve body that cooperates with the valve seat, a valve stem fixedly connected to the valve plate on the valve cover via an opening and closing device, and a filter device for filtering impurities in the fluid on the valve body.

[0005] A further improvement is that the filtering device includes: an installation port at the bottom of the valve body, an installation seat on the installation port, a sealing sleeve on the installation seat that matches the installation port, a filter cylinder on the sealing sleeve, and one end of the filter cylinder abutting against the sealing sleeve and the other end abutting against the valve seat.

[0006] A further improvement is that the valve stem is also equipped with a cleaning device for cleaning the filter cartridge.

[0007] A further improvement is that the cleaning device includes: a sliding plate that can slide on the valve stem, a sliding sleeve on the sliding plate, and a brush that abuts against the filter cartridge on the sliding plate.

[0008] A further improvement is that the slide plate is provided with a through hole, the diameter of the through hole on the side closer to the valve seat is larger than the diameter on the other side, and the two ends of the through hole are not located on the same axis.

[0009] A further improvement is that the valve stem is also equipped with a limiting nut for pushing the slide plate.

[0010] A further improvement is that the sealing sleeve is provided with a limiting groove that matches the filter cylinder.

[0011] A further improvement is that the mounting base is also provided with a guide sleeve that cooperates with the valve stem.

[0012] A further improvement is that a guide seat is also locked inside the valve seat to enhance the guiding performance of the valve stem.

[0013] A further improvement is that the valve body is provided with a connecting flange to facilitate the installation of the valve on the water supply pipeline.

[0014] The advantages and beneficial effects of this utility model are as follows:

[0015] With its simple structure and convenient use, the filter device can filter impurities in high-pressure fluids, preventing these impurities from accelerating diaphragm wear and extending diaphragm life. Furthermore, since the purpose of the pressure reducing valve is to reduce the pressure of the upstream fluid, the filter cartridge can play an auxiliary role in pressure reduction, enhancing the pressure reducing effect of the pressure reducing valve and extending the overall service life of the pressure reducing valve. Attached Figure Description

[0016] Figure 1 This is a front sectional view of a precision pressure reducing valve according to the present invention.

[0017] Figure 2 This is a schematic diagram of a precision pressure reducing valve filter cylinder according to the present invention;

[0018] Figure 3 This is a top view schematic diagram of a precision pressure reducing valve slide plate according to the present invention;

[0019] Figure 4 This is an enlarged schematic diagram of part A of a precision pressure reducing valve according to this utility model;

[0020] Figure 5 This is a top view schematic diagram of a guide seat for a precision pressure reducing valve according to this utility model;

[0021] In the diagram: 1. Valve body; 2. Fluid passage; 3. Valve seat; 4. Valve cover; 5. Valve plate; 6. Valve stem; 7. Diaphragm; 8. Spring; 9. First connecting hole; 10. Second connecting hole; 11. Third connecting hole; 12. Fourth connecting hole; 13. Mounting port; 14. Mounting base; 15. Sealing sleeve; 16. Filter cartridge; 17. Slide plate; 18. Sliding sleeve; 19. Brush; 20. Through hole; 21. Limit nut; 22. Limit groove; 23. Guide sleeve; 24. Connecting flange; 25. Guide hole; 26. Guide seat. Detailed Implementation

[0022] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0023] like Figures 1-5As shown, a precision pressure reducing valve includes a valve body 1, a fluid channel 2 inside the valve body 1, a valve seat 3 on the fluid channel 2, a valve cover 4 on the valve body 1, a valve plate 5 inside the valve body 1 that cooperates with the valve seat 3, a valve stem 6 fixedly connected to the valve plate 5 on the valve cover 4 through an opening and closing device, and a filter device for filtering impurities in the fluid on the valve body 1.

[0024] The opening and closing device includes: a diaphragm 7 is provided between the valve cover 4 and the valve body 1, the diaphragm 7 is fixedly connected to the valve stem 6, the valve cover 4 is also provided with a guide hole 25 that matches the valve stem 6, a spring 8 is sleeved on the upper end of the valve stem 6, one end of the spring 8 abuts against the valve cover 4 and the other end abuts against the diaphragm 7, the valve body 1 is provided with a first connecting hole 9 and a second connecting hole 10 on both sides of the fluid channel 2, the valve cover 4 is provided with a third connecting hole 11 and a fourth connecting hole 12, the first connecting hole 9 and the third connecting hole 11 are connected by a water injection pipe, the second connecting hole 10 and the fourth connecting hole 12 are connected by a drain pipe, the water injection pipe is provided with a needle valve, and the drain pipe is provided with a guide valve;

[0025] The configuration of the water injection pipe, drain pipe, needle valve, and pilot valve is common knowledge and therefore will not be described in detail.

[0026] In order to filter impurities in the water, reduce wear on one side of the membrane 7, and improve the service life of the membrane 7, the filtration device includes: a mounting port 13 at the bottom of the valve body 1, a mounting seat 14 on the mounting port 13, a sealing sleeve 15 matching the mounting port 13 on the mounting seat 14, a filter cylinder 16 on the sealing sleeve 15, and one end of the filter cylinder 16 abutting against the sealing sleeve 15 and the other end abutting against the valve seat 3.

[0027] To prevent the filter cartridge 16 from becoming clogged and affecting the water output, the valve stem 6 is also provided with a cleaning device for cleaning the filter cartridge 16. The cleaning device includes: a sliding plate 17 that can slide on the valve stem 6, a sliding sleeve 18 on the sliding plate 17, and a brush 19 that abuts against the filter cartridge 16 on the sliding plate 17.

[0028] In order for the slide plate 17 to rotate and rise under the action of the fluid, the slide plate 17 is provided with a through hole 20. The diameter of the through hole 20 on the side closer to the valve seat 3 is larger than the diameter on the other side, and the two ends of the through hole 20 are not located on the same axis.

[0029] To improve efficiency, the valve stem 6 is also provided with a limiting nut 21 for pushing the slide plate 17.

[0030] To facilitate the installation of the filter cartridge 16, the sealing sleeve 15 is provided with a limiting groove 22 that matches the filter cartridge 16.

[0031] To improve the stability of the valve plate 5 and valve seat 3 during lifting and lowering, the mounting base 14 is also provided with a guide sleeve 23 that cooperates with the valve stem 6.

[0032] The valve seat 3 is also fitted with a guide seat 26 to enhance the guiding properties of the valve stem 6.

[0033] To facilitate valve installation, the valve body 1 is provided with a connecting flange 24 for easy installation of the valve on the water supply pipeline.

[0034] Working principle: When in use, the fluid enters one side of the fluid channel 2 of the valve and then flows to the valve seat 3. Before flowing to the valve seat 3, the fluid will pass through the filter cartridge 16 to reduce impurities in the water. Then, when the fluid pressure is greater than the elastic force of the spring 8, the fluid will push the valve plate 5 to move the diaphragm 7 upward, thus flowing into the other side.

[0035] At this time, some fluid will also enter the water injection pipe through the first connection hole 9. If the needle valve is in the open state and the pilot valve is in the closed state, the fluid in the water injection pipe will be injected between the valve cover 4 and the diaphragm 7. When the spring force of the spring 8 and the water pressure of the fluid between the diaphragm 7 and the valve cover 4 are greater than the fluid in the valve body 1, the diaphragm 7 moves towards the valve seat 3, thereby closing the fluid channel 2.

[0036] Subsequently, when the user opens the pilot valve, the fluid between the diaphragm 7 and the valve cover 4 flows to the fourth connection hole 12 and through the drain pipe to the fourth connection hole 12, thus completing the pressure relief. At this time, the water pressure of the fluid between the diaphragm 7 and the valve cover 4 and the elastic force of the spring 8 are less than the water pressure on the other side of the fluid channel 2. The diaphragm 7 will move upward again, thereby opening the valve seat 3 again and allowing the fluid to be discharged downstream of the water supply pipe.

[0037] Users can control the opening and closing state of valve plate 5 by adjusting the opening degree of pilot valve and needle valve, thereby reducing fluid pressure;

[0038] During the repeated opening and closing of the valve plate 5, the fluid will also push the slide plate 17 to rotate and rise, thereby cleaning the filter cartridge 16 and preventing the filter cartridge 16 from becoming clogged and affecting the performance of the pressure reducing valve. Impurities will settle on the mounting base 14 and its surroundings, making it convenient for users to clean regularly.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions above are only illustrative of the principles of this utility model. Various changes and modifications may be made to this utility model without departing from the spirit and scope of this utility model. All such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A precision pressure reducing valve, comprising a valve body, a fluid passage provided within the valve body, a valve seat provided on the fluid passage, a valve cover provided on the valve body, a valve plate provided within the valve body to cooperate with the valve seat, and a valve stem fixedly connected to the valve plate via an opening and closing device on the valve cover, characterized in that: The valve body is also equipped with a filter device for filtering impurities in the fluid.

2. The precision pressure reducing valve according to claim 1, characterized in that: The filtering device includes: a mounting port at the bottom of the valve body, a mounting seat on the mounting port, a sealing sleeve on the mounting seat that matches the mounting port, a filter cylinder on the sealing sleeve, and one end of the filter cylinder abutting against the sealing sleeve and the other end abutting against the valve seat.

3. A precision pressure reducing valve according to claim 2, characterized in that: The valve stem is also equipped with a cleaning device for cleaning the filter cartridge.

4. A precision pressure reducing valve according to claim 3, characterized in that: The cleaning device includes: a sliding plate that can slide on the valve stem, a sliding sleeve on the sliding plate, and a brush that abuts against the filter cartridge on the sliding plate.

5. A precision pressure reducing valve according to claim 4, characterized in that: The slide plate is provided with a through hole, the diameter of the through hole on the side closer to the valve seat is larger than the diameter on the other side, and the two ends of the through hole are not located on the same axis.

6. A precision pressure reducing valve according to claim 3, characterized in that: The valve stem is also equipped with a limiting nut for pushing the sliding plate.

7. A precision pressure reducing valve according to claim 2, characterized in that: The sealing sleeve is provided with a limiting groove that matches the filter cartridge.

8. A precision pressure reducing valve according to claim 2, characterized in that: The mounting base is also provided with a guide sleeve that cooperates with the valve stem.

9. A precision pressure reducing valve according to claim 1, characterized in that: The valve seat is also fitted with a guide seat to enhance the guiding properties of the valve stem.

10. A precision pressure reducing valve according to claim 1, characterized in that: The valve body is provided with a connecting flange to facilitate the installation of the valve on the water supply pipeline.

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