Multi-stage pressure reducing valve

Abstract

The utility model discloses a multistage pressure reducing valve which comprises a valve body, a valve cavity is formed in the valve body, a water inlet is connected to the bottom of the valve body, a water outlet is connected to the side face of the upper portion of the valve body, a valve rod is vertically installed in the valve cavity in a sliding mode, a plugging head is arranged at the lower end of the valve rod, and a sealing gasket is fixedly installed at the bottom of the valve cavity. A water passing opening is formed in the middle of the sealing gasket, the plugging head can press downwards to plug the water passing opening, a plurality of pressure reduction discs arranged at intervals are fixedly installed in the valve cavity, a plurality of flow guide holes are formed in the pressure reduction discs in an array mode, and when water enters the water inlet, water pressure can jack up the plugging head to enable the water to enter the valve cavity. Then inlet water advances along a channel formed by the flow guide holes and the slow flow sills, when the water pressure is too large, the blocking section can be jacked up, the middle through holes of part of the pressure reduction discs are opened, the water can directly reach gaps of the upper layers of pressure reduction discs, and therefore the multi-stage pressure reduction effect is achieved.

Description

Technical Field

[0001] This utility model relates to the field of pressure reducing valve technology, and in particular to a multi-stage 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. Existing pressure reducing valves are all single-stage pressure reducing valves with limited pressure reduction range. To achieve a significant pressure reduction effect, multiple pressure reducing valves must be connected in series, which is costly and cumbersome to install, and requires further improvement. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a multi-stage pressure reducing valve, which solves the current pain points in this field.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0005] A multi-stage pressure reducing valve includes a valve body, a valve cavity within the valve body, an inlet connected to the bottom of the valve body, an outlet connected to the upper side of the valve body, a valve stem vertically slidably mounted in the valve cavity, a sealing head provided at the lower end of the valve stem, a sealing gasket fixedly mounted at the bottom of the valve cavity, a water passage provided in the middle of the sealing gasket, the sealing head capable of pressing down to block the water passage, and a plurality of pressure reducing plates arranged at intervals fixedly mounted in the valve cavity, the pressure reducing plates having a plurality of guide holes arranged in an array.

[0006] To further explain, the lower end of the valve stem is divided into a plugging section, a transition section, and a sealing head from top to bottom.

[0007] To further explain, an mounting sleeve is fixedly installed on the top of the valve body, and a pressure rod section is provided at the upper end of the valve stem. The pressure rod section is vertically slidably installed in the mounting sleeve, and a spring is provided in the sleeve to connect the pressure rod section and the top of the mounting sleeve.

[0008] To further explain, the distance between the pressure reducing plates decreases sequentially from bottom to top.

[0009] To further explain, the pressure reducing plate has a central through hole, and the plugging section passes through the central through hole.

[0010] To further explain, a plurality of flow guide holes are arranged in an array at one end of the step-down plate, and the flow guide holes on an adjacent step-down plate are arranged on the other side.

[0011] To further explain, flow dampers are fixedly installed on both the upper and lower surfaces of the pressure reducing plate, and the flow dampers of two adjacent pressure reducing plates are arranged alternately.

[0012] In summary, the advantages of this utility model compared to the prior art are as follows: when water enters the inlet, the water pressure can lift the plug head, allowing water to enter the valve cavity. Then, the water flows along the channel formed by the guide hole and the slow flow threshold. When the water pressure is too high, it can lift the plug section, causing the central through hole of part of the pressure reducing plate to open, allowing water to directly reach the gaps between the upper pressure reducing plates, thereby achieving the effect of multi-stage pressure reduction. Attached Figure Description

[0013] The above and other objects, features, and advantages of the present invention will become readily apparent from the following detailed description of exemplary embodiments, taken in conjunction with the accompanying drawings. Several embodiments of the present invention are illustrated in the drawings by way of example and not limitation, in which:

[0014] Figure 1 This is a schematic diagram of the structure of a multi-stage pressure reducing valve;

[0015] Figure 2 This is a schematic diagram of the step-down plate.

[0016] Explanation of reference numerals in the attached drawings: 10. Valve body; 11. Valve cavity; 12. Inlet; 13. Outlet; 14. Mounting sleeve; 15. Valve stem; 16. Pressure rod section; 17. Spring; 18. Plug section; 19. Transition section; 20. Plug head; 21. Sealing gasket; 22. Water passage; 23. Pressure reducing plate; 24. Central through hole; 25. Flow guide hole; 26. Flow buffer. Detailed Implementation

[0017] The utility model will be further described in detail below with reference to the accompanying drawings.

[0018] A multi-stage pressure reducing valve includes a valve body 10, a valve cavity 11 within the valve body 10, an inlet 12 connected to the bottom of the valve body 10, an outlet 13 connected to the upper side of the valve body 10, a valve stem 15 vertically slidably mounted in the valve cavity 11, the lower end of the valve stem 15 being divided into a plugging section 18, a transition section 19, and a sealing head 20 from top to bottom, an mounting sleeve 14 fixedly mounted above the valve body 10, a pressure rod section 16 provided at the upper end of the valve stem 15, the pressure rod section 16 being vertically slidably mounted in the mounting sleeve 14, a spring 17 provided in the sleeve 14 connecting the pressure rod section 16 and the top of the mounting sleeve 14, a sealing gasket 21 fixedly mounted at the bottom of the valve cavity 11, the sealing gasket 21 having a water passage 22 in the middle, the water passage 22 being an inverted cone shape. The through-hole, the water inlet 22 connects the valve chamber 11 and the water inlet 12. The plug head 20 can press down to block the water inlet 22. When the water pressure in the water inlet 12 is high, the plug head 20 can be lifted. Several pressure reducing plates 23 are fixedly installed in the valve chamber 11 at intervals. The distance between the pressure reducing plates 23 decreases from bottom to top. A central through-hole 24 is provided in the middle of the pressure reducing plate 23. The plugging section 18 passes through the central through-hole 24. Several guide holes 25 are arranged in an array at one end of the pressure reducing plate 23. The guide holes 25 on the adjacent pressure reducing plate 23 are located on the other side. Slow flow thresholds 26 are fixedly installed on both the upper and lower surfaces of the pressure reducing plate 23. The slow flow thresholds 26 of the adjacent two pressure reducing plates 23 are arranged alternately.

[0019] The water pressure entering through the inlet 12 can lift the plug head 20, allowing water to enter the valve chamber 11. Then, the water flows along the channel formed by the guide hole 25 and the slow flow threshold 26. When the water pressure is too high, it can lift the plug section 18, causing the central through hole 24 of part of the pressure reducing plate 23 to open, allowing water to directly reach the gaps between the upper pressure reducing plates 23, thereby achieving a multi-stage pressure reduction effect.

[0020] The above description is merely an exemplary embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model. The scope of protection of the present utility model is determined by the appended claims.

Claims

1. A multi-stage pressure reducing valve, comprising a valve body (10), wherein the valve body (10) contains a valve cavity (11), an inlet (12) is connected to the bottom of the valve body (10), and an outlet (13) is connected to the upper side of the valve body (10), characterized in that: A valve stem (15) is vertically slidably installed in the valve cavity (11). A sealing head (20) is provided at the lower end of the valve stem (15). A sealing gasket (21) is fixedly installed at the bottom of the valve cavity (11). A water outlet (22) is provided in the middle of the sealing gasket (21). The sealing head (20) can press down to block the water outlet (22). A pressure reducing plate (23) is fixedly installed in the valve cavity (11) with spaced intervals. Several guide holes (25) are arranged in an array on the pressure reducing plate (23).

2. The multi-stage pressure reducing valve according to claim 1, characterized in that: The lower end of the valve stem (15) is divided into a plugging section (18), a transition section (19), and a sealing head (20) from top to bottom.

3. The multi-stage pressure reducing valve according to claim 1, characterized in that: An mounting sleeve (14) is fixedly installed on the upper part of the valve body (10). A pressure rod section (16) is provided at the upper end of the valve stem (15). The pressure rod section (16) is vertically slidably installed in the mounting sleeve (14). A spring (17) is provided in the sleeve to connect the pressure rod section (16) and the top of the mounting sleeve (14).

4. A multi-stage pressure reducing valve according to claim 1, characterized in that: The distance between the pressure reducing plates (23) decreases from bottom to top.

5. A multi-stage pressure reducing valve according to claim 2, characterized in that: The pressure reducing plate (23) has a central through hole (24) in the middle, and the plugging section (18) passes through the central through hole (24).

6. A multi-stage pressure reducing valve according to claim 1, characterized in that: The step-down plate (23) has a plurality of flow guide holes (25) arranged in an array at one end, and the flow guide holes (25) on the adjacent step-down plate (23) are arranged on the other side.

7. A multi-stage pressure reducing valve according to claim 1, characterized in that: The pressure reducing plate (23) is fixedly installed on both the upper and lower surfaces with flow sills (26), and the flow sills (26) of two adjacent pressure reducing plates (23) are arranged alternately.

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