Multifunctional pressure reducing valve

Abstract

The utility model relates to the technical field of pressure reducing valves, and provides a multifunctional pressure reducing valve which comprises a main valve body. One end of the main valve body is provided with an inlet channel, and the other end is provided with an outlet channel; a steam-water separator is arranged in the main valve body; an air hole is formed in the bottom of the steam-water separator; an air hole of the steam-water separator is communicated with the inlet channel; a main spring is arranged in the steam-water separator; a valve clack is arranged at the top of the main spring; the top of the valve clack is connected with the piston; a lower valve body is arranged below the steam-water separator, and a drain port is reserved in the lower valve body. The pressure reducing valve integrates steam-water separation, water drainage and pressure reduction, the structural stability is improved, the product quality of the pressure reducing valve is improved, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure reducing valves, in particular to a multifunctional pressure reducing valve. Background Art

[0002] A pressure reducing valve is a valve that reduces the inlet pressure to a certain required outlet pressure by adjusting the pressure and relies on the energy of the medium itself to keep the outlet pressure stable.

[0003] Pressure reducing valves primarily utilize pilot-operated and float-type pressure reducing valves. Current pilot-operated pressure reducing valves feature a diaphragm positioned below the valve body, providing only pressure relief and not drainage, requiring a separate water transfer valve for use. Current float-type pressure reducing valves require a large space for the float ball to float, resulting in a larger valve size and installation space, limiting their application. Furthermore, the float ball is susceptible to wear during rotation, making it prone to internal water accumulation and damage, resulting in a shorter service life. Utility Model Content

[0004] The utility model mainly solves the technical problems that the current pilot-operated pressure reducing valve cannot realize the water-draining function and the float-type pressure reducing valve is easy to be damaged and has a short service life. A multifunctional pressure reducing valve is proposed, which integrates steam-water separation, water-draining and pressure reduction, improves the structural stability, enhances the product quality of the pressure reducing valve and prolongs the service life.

[0005] The utility model provides a multifunctional pressure reducing valve, comprising: a main valve body;

[0006] An inlet channel is provided at one end of the main valve body, and an outlet channel is provided at the other end; a steam-water separator is provided within the main valve body;

[0007] The bottom of the steam-water separator is provided with an air hole; the air hole of the steam-water separator is connected to the inlet channel; a main spring is provided in the steam-water separator; a valve disc is provided on the top of the main spring; and the top of the valve disc is connected to the piston;

[0008] A lower valve body is arranged below the steam-water separator, and a drain port is reserved on the lower valve body.

[0009] Preferably, an upward steam channel communicating with the inlet channel and a downward steam channel communicating with the outlet channel are reserved on the main valve body.

[0010] Preferably, a pilot valve body is provided above the main valve body;

[0011] A pilot valve is provided in the pilot valve body; the bottom of the pilot valve is communicated with the upward steam channel; the upper part of the pilot valve is communicated with the downward steam channel;

[0012] A pilot valve spring is arranged in the pilot valve, and a pilot valve ball is arranged on the top of the pilot valve spring;

[0013] A support rod is arranged on the pilot valve ball, and a diaphragm is arranged above the support rod.

[0014] Preferably, a feedback channel is left on the main valve body;

[0015] The feedback channel is communicated with the outlet channel and the space where the diaphragm is located respectively.

[0016] Preferably, a spring box is provided above the pilot valve body;

[0017] An adjusting spring is arranged in the spring box;

[0018] The regulating spring is arranged above the diaphragm, an regulating bolt is arranged on the top of the regulating spring, and a valve cap is arranged outside the regulating bolt.

[0019] Preferably, a screw plug is provided on the pilot valve body.

[0020] Preferably, a pilot valve filter seat is provided between the bottom of the pilot valve and the upward steam channel, and a pilot valve filter is provided in the pilot valve filter seat.

[0021] Preferably, a hydrophobic component is provided above the hydrophobic port;

[0022] A membrane box is arranged in the hydrophobic component; and a hydrophobic filter is covered on the membrane box.

[0023] Preferably, the membrane box is filled with a liquid that expands with heat and contracts with cold.

[0024] Preferably, the hydrophobic assembly is mounted on the lower valve cover, and the lower valve cover is fixed to the lower valve body;

[0025] A drain port is provided on the lower valve cover.

[0026] The multifunctional pressure reducing valve provided by the utility model has the following advantages compared with the prior art:

[0027] 1. This utility model can adjust the spring pressure by adjusting the screw to adjust the outlet pressure. A feedback channel is left on the main valve body; the outlet pressure is balanced through the feedback channel and the diaphragm to achieve the pressure reduction function.

[0028] 2. Built-in high-efficiency rotary steam-water separator can replace conventional pipeline steam-water separator, with good steam-water separation effect.

[0029] 3. The membrane box of the hydrophobic component is filled with a liquid that expands with heat and contracts with cold, which can achieve the hydrophobic function. There is no need to configure a separate hydrophobic valve. The hydrophobic method has a fast response and strong drainage capacity.

[0030] 4. This new device integrates steam-water separation, water drainage, and pressure reduction, enabling multifunctional steam management. Its stable structure makes it less susceptible to damage, improving the quality of the pressure reducing valve and extending its service life. Its simple, compact, and small overall structure saves significant installation space and reduces costs.

[0031] 5. The internal components of this utility model are all made of stainless steel with good corrosion resistance; the pilot valve and the hydrophobic components are built-in filter screens to prevent the valve hole from being blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic structural diagram of the multifunctional pressure reducing valve provided by the utility model;

[0033] Figure 2 This is an axial cross-sectional view of the multifunctional pressure reducing valve provided by the utility model;

[0034] Figure 3 This is a structural diagram of the steam-water separator provided by the utility model;

[0035] Figure 4 yes Figure 1 An enlarged schematic diagram of the middle pilot valve section;

[0036] Figure 5 yes Figure 1 Schematic diagram of the enlarged hydrophobic part.

[0037] Figure numerals: 1. Main valve body; 2. Pilot valve body; 3. Plug; 4. Pilot valve; 5. Spring box; 6. Adjusting spring; 7. Valve bonnet; 8. Adjusting bolt; 9. Diaphragm; 10. Pilot valve filter; 11. Pilot valve filter seat; 12. Piston; 13. Cylinder body; 14. Main valve seat; 15. Steam-water separator; 16. Main spring; 17. Lower valve body; 18. Hydrophobic filter; 19. Diaphragm box; 20. Lower valve cover; 21. Hydrophobic assembly; 22. Inlet channel; 23. Outlet channel; 24. Upward steam channel; 25. Downward steam channel; 26. Valve disc; 27. Air hole; 28. Pilot valve spring; 29. ​​Pilot valve ball; 30. Support rod; 31. Feedback channel; 32. Hydrophobic port. DETAILED DESCRIPTION

[0038] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely intended to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, rather than all of its contents.

[0039] like Figure 1-2As shown, the utility model provides a multifunctional pressure reducing valve, comprising: a main valve body 1.

[0040] An inlet channel 22 is provided at one end of the main valve body 1 , and an outlet channel 23 is provided at the other end; a steam-water separator 15 is provided inside the main valve body 1 .

[0041] like Figure 3 As shown, the bottom of the steam-water separator 15 has an air hole 27, which communicates with the inlet channel 22. Specifically, a gap between the inner wall of the main valve body 1 and the steam-water separator 15 serves as a gas channel, allowing gas to enter the steam-water separator 15 through the gap. A main spring 16 is installed within the steam-water separator 15. A valve disc 26 is located on top of the main spring 16. The top of the valve disc 26 is connected to the piston 12. The cylinder 13 of the piston 12 is located within the main valve body 1. Below the cylinder 13 of the piston 12 is the main valve seat 14, and below the main valve seat 14 is the valve disc 26. The main valve seat 14 is fixed within the main valve body 1, while the valve disc 26 is movable within the main valve body 1. When subjected to downward pressure, the piston 12 presses down on the valve disc 26 and the main spring 16, opening the gap between the valve disc 26 and the main valve seat 14 and allowing gas in the steam-water separator 15 to enter the outlet channel 23. The steam-water separator 15 can be a rotary steam-water separator. Steam flows in the steam-water separator 15 to generate centrifugal force, which will separate some liquid water, and the water will drip downward into the hydrophobic component 21.

[0042] The main valve body 1 has an upward gas passage 24 communicating with the inlet passage 22 and a downward gas passage 25 communicating with the outlet passage 23 .

[0043] like Figure 4 As shown, a pilot valve body 2 is positioned above the main valve body 1. A pilot valve 4 is positioned within the pilot valve body 2. The bottom of the pilot valve 4 communicates with the ascending steam passage 24, while the top of the pilot valve 4 communicates with the descending steam passage 25. A pilot valve spring 28 is positioned within the pilot valve 4, with a pilot valve ball 29 positioned atop the pilot valve spring 28. A support rod 30 is positioned above the pilot valve ball 29, and a diaphragm 9 is positioned above the support rod 30. The diaphragm 9 is made of 301 stainless steel. A feedback channel 31 is provided within the main valve body 1. This feedback channel 31 communicates with the outlet passage 23 and the space containing the diaphragm 9, respectively. A pilot valve filter seat 11 is positioned between the bottom of the pilot valve 4 and the ascending steam passage 24, with a pilot valve filter 10 positioned within the seat 11. A screw plug 3 is positioned above the pilot valve body 2.

[0044] A spring box 5 is located above the pilot valve body 2. An adjustment spring 6 is housed within the spring box 5. The adjustment spring 6 is positioned above a diaphragm 9. An adjustment bolt 8 is located on top of the adjustment spring 6. A valve cap 7 is attached to the outside of the adjustment bolt 8 and secured to the spring box 5. The adjustment bolt 8 depresses the adjustment spring 6, which, in turn, depresses the pilot valve ball 29 via the diaphragm 9 and support rod 30. The pilot valve ball 29 then depresses the pilot valve spring 28. Adjusting the pilot valve ball 29 up and down using the adjustment bolt 8 adjusts the opening and closing of the pilot valve 4. By adjusting the pressure of the adjustment spring 6 using the adjustment bolt 8, the set reduced pressure outlet pressure is adjusted.

[0045] The pilot valve 4 opens when the regulating spring 6 acts on the diaphragm 9. A small portion of steam entering the inlet channel 22 can enter the lower part of the pilot valve 4 through the ascending steam channel 24 and the pilot valve filter seat 11. The steam enters the descending steam channel 25 through the pilot valve 4, so that the higher steam pressure acts on the upper part of the piston 12, causing the piston 12 to move downward, pressing down the valve disc 26, opening the steam-water separator 15, and allowing the inlet channel 22 and the outlet channel 23 to be connected, so that most of the steam can enter from the inlet channel 22 and flow out from the outlet channel 23.

[0046] like Figure 5 As shown, a lower valve body 17 is provided below the steam-water separator 15, and a drain port 32 is provided on the lower valve body 17. A drain assembly 21 is provided above the drain port 32. As a preferred embodiment of the present invention, a membrane box 19 is provided in the drain assembly 21; the membrane box 19 is filled with a liquid that expands with heat and contracts with cold. A drain filter 18 is covered on the membrane box 19. Specifically, the drain assembly 21 is installed on the lower valve cover 20, and the lower valve cover 20 is fixed to the lower valve body 17; a drain port 32 is provided on the lower valve cover 20. The water generated by the steam-water separator 15 flows into the drain assembly 21 and is discharged through the drain port 32. The membrane box 19 is filled with a liquid that expands with heat and contracts with cold, and the opening of the drain assembly 21 can be adjusted according to the temperature of the steam.

[0047] The utility model provides a multifunctional pressure reducing valve. Steam enters from an inlet channel 22 and is divided into two paths. Most of the steam enters the steam-water separator 15 from the gap between the steam-water separator 15 and the inner wall of the main valve body 1; a small part of the steam enters the lower part of the pilot valve 4 from the upward steam channel 24 and the pilot valve filter seat 11. The steam enters the downward steam channel 25 through the pilot valve 4, causing the piston 12 to move downward and depress the valve disc 26 to open the steam-water separator 15; after the steam-water separator 15 is opened, most of the steam enters the outlet channel 23 through the steam-water separator 15 and flows out of the multifunctional pressure reducing valve of the utility model. A small amount of steam entering outlet channel 23 enters feedback channel 31 and is transferred through feedback channel 31 to the underside of diaphragm 9. As outlet pressure rises, diaphragm 9 gradually contracts and lifts. Consequently, pilot valve ball 29 of pilot valve 4 gradually closes, reducing the pressure above piston 12. Piston 12 moves upward, and separator 15 also closes. Ultimately, outlet pressure balance is achieved, reaching the target value, achieving the pressure reduction function. Water separated by separator 15 drips downward into drain assembly 21 and is discharged through drain port 32, completing the water drainage function.

[0048] The multifunctional pressure reducing valve of the utility model adopts a pilot piston type pressure reducing structure, integrating steam-water separation, hydrophobicity, pressure reduction and stabilization, and is suitable for improving and precisely controlling the steam quality before various steam-using equipment.

[0049] When the multifunctional pressure reducing valve of the present invention is used, it is installed on the steam system and adjusted when steam medium passes through, preferably under working load. After the steam system is ready, confirm that the valves before and after the pressure reducing valve are closed, open the bypass valve of the steam system, and allow the steam to fully purge the steam pipeline; after sufficient purge, close the bypass valve. Slowly open the inlet stop valve of the steam system, gently turn the adjusting bolt 8 of this pressure reducing valve to adjust, and slightly open the outlet stop valve of the pressure reducing valve to allow a small amount of steam to flow through. After adjusting the steam pressure after the valve to the predetermined pressure range, slowly open the outlet valve. Please adjust the pressure reducing valve again as needed to make the pressure after the pressure reducing valve reach the predetermined pressure. After the adjustment is completed, tighten the adjusting bolt 8 to fix it. Viewed from directly above the pressure reducing valve (above the adjusting bolt 8), turning the adjusting bolt 8 clockwise will increase the outlet pressure of the pressure reducing valve; turning the adjusting bolt 8 counterclockwise will reduce the outlet pressure of the pressure reducing valve.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications to the technical solutions described in the above embodiments, or equivalent replacement of some or all of the technical features therein, do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multifunctional pressure reducing valve, characterized in that: include: Main valve body (1); An inlet channel (22) is provided at one end of the main valve body (1), and an outlet channel (23) is provided at the other end; a steam-water separator (15) is provided inside the main valve body (1); An air hole (27) is provided at the bottom of the steam-water separator (15); the air hole (27) of the steam-water separator (15) is communicated with the inlet channel (22); a main spring (16) is provided in the steam-water separator (15); a valve flap (26) is provided at the top of the main spring (16); the top of the valve flap (26) is connected to the piston (12); A lower valve body (17) is provided below the steam-water separator (15), and a drain port (32) is left on the lower valve body (17).

2. The multifunctional pressure reducing valve according to claim 1, characterized in that: The main valve body (1) is provided with an upward steam channel (24) communicating with the inlet channel (22) and a downward steam channel (25) communicating with the outlet channel (23).

3. The multifunctional pressure reducing valve according to claim 2, characterized in that: A pilot valve body (2) is provided above the main valve body (1); A pilot valve (4) is provided in the pilot valve body (2); the bottom of the pilot valve (4) is communicated with the upward steam channel (24); the upper part of the pilot valve (4) is communicated with the downward steam channel (25); A pilot valve spring (28) is provided in the pilot valve (4), and a pilot valve ball (29) is provided on the top of the pilot valve spring (28); A support rod (30) is provided on the pilot valve ball (29), and a diaphragm (9) is provided above the support rod (30).

4. The multifunctional pressure reducing valve according to claim 3, characterized in that: A feedback channel (31) is left on the main valve body (1); The feedback channel (31) is respectively connected to the outlet channel (23) and the space where the diaphragm (9) is located.

5. The multifunctional pressure reducing valve according to claim 3, characterized in that: A spring box (5) is provided above the pilot valve body (2); An adjusting spring (6) is provided in the spring box (5); The regulating spring (6) is arranged above the diaphragm (9), an regulating bolt (8) is arranged on the top of the regulating spring (6), and a valve cap (7) is arranged outside the regulating bolt (8).

6. The multifunctional pressure reducing valve according to claim 3, characterized in that: A screw plug (3) is provided on the pilot valve body (2).

7. The multifunctional pressure reducing valve according to claim 3, characterized in that: A pilot valve filter seat (11) is provided between the bottom of the pilot valve (4) and the upward steam channel (24), and a pilot valve filter (10) is provided in the pilot valve filter seat (11).

8. The multifunctional pressure reducing valve according to claim 1, characterized in that: A hydrophobic component (21) is provided above the hydrophobic port (32); A membrane box (19) is provided in the hydrophobic component (21); and a hydrophobic filter (18) is covered on the membrane box (19).

9. The multifunctional pressure reducing valve according to claim 8, characterized in that: The membrane box (19) is filled with a liquid that expands with heat and contracts with cold.

10. The multifunctional pressure reducing valve according to claim 8, characterized in that: The hydrophobic assembly (21) is mounted on the lower valve cover (20), and the lower valve cover (20) is fixed to the lower valve body (17); A drain port (32) is left on the lower valve cover (20).

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