A multi-stage pressure reducing valve

Abstract

The application discloses a multistage pressure reducing valve and relates to the technical field of valves.The application comprises a valve body, the bottom and one side of the valve body are respectively provided with a water inlet pipe and a water outlet pipe, the top of the valve body is inserted with a penetrating valve rod, the bottom of the valve rod is fixedly connected with an intermediate frame, a plurality of plug heads with tapered bottoms are fixedly arranged around the intermediate frame, cavities are arranged in the plug heads, the circumferences of the cavities are respectively provided with two groups of penetrating first-stage water outlets and second-stage water outlets, the first-stage water outlets are located below the second-stage water outlets and are more in number than the second-stage water outlets, in the application, multistage pressure reduction can be realized in the valve body, then the valve body is closed, the closing difficulty is reduced, the water hammer effect is avoided, the service life of the valve body is prolonged, people can conveniently observe the opening and closing state of the valve body, people can also be reminded through automatic sound in cooperation with the multistage pressure reduction process, and people can conveniently know to what extent the pressure reduction has proceeded.

Description

Technical Field

[0001] This invention belongs to the field of valve technology, and in particular relates to a multi-stage pressure reducing valve. Background Technology

[0002] As is well known, 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 transported medium. Based on their function, they can be divided into shut-off valves, check valves, regulating valves, etc., and can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metals, and radioactive media.

[0003] When faced with large pressure differential conditions, traditional valves are difficult to reduce pressure in stages, making it difficult to close the valves. At the same time, the valve body is easily damaged under the water hammer effect. Therefore, a multi-stage pressure reducing valve is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-stage pressure reducing valve that enables multi-stage pressure reduction within the valve body before closing it, reducing the difficulty of closing, avoiding water hammer effect, and improving the service life of the valve body. It also allows for easy observation of the valve's open and closed status and provides automatic audible alerts during the multi-stage pressure reduction process, helping users understand the progress of pressure reduction and solving existing technical problems.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0006] A multi-stage pressure reducing valve includes: a valve body, an inlet pipe and an outlet pipe respectively provided at the bottom and one side of the valve body, a through valve stem inserted into the top of the valve body, an intermediate frame fixedly connected to the bottom of the valve stem, and multiple plugs with conical bottoms fixed around the intermediate frame, each plug having a cavity, and two sets of through primary outlets and secondary outlets respectively provided around the circumference of each cavity, wherein the primary outlets are located below the secondary outlets and are more numerous than the secondary outlets;

[0007] The bottom of the intermediate frame is fixedly connected to a three-stage water outlet pipe. The three-stage water outlet pipe has two sets of perforations around its circumference. Through the cooperation of the plug, the three-stage water outlet pipe and the retaining ring, when the valve body is closed, the valve body can be depressurized in multiple stages by using the first-stage water outlet, the second-stage water outlet and the third-stage water outlet pipe before the valve body is closed. This reduces the difficulty of closing, avoids water hammer effect and improves the service life of the valve body.

[0008] A retaining ring is fixedly connected to the inner circumference of the water inlet pipe. A through main hole is provided in the center of the retaining ring. The main hole is used in conjunction with the three-stage water outlet pipe. A number of through auxiliary holes are provided on the surface of the retaining ring. The auxiliary holes are used in conjunction with the plugs.

[0009] In one possible design, a handwheel is rotatably connected to the top of the valve body, and the valve stem is threaded through the handwheel.

[0010] In one possible design, two guide rails are fixedly connected to the inner circumference of the valve body, and two slide rods are fixedly connected to both sides of the intermediate frame, with the two slide rods slidably connected to the two guide rails respectively.

[0011] In one possible design, a drive ring is fixedly connected to the circumference of the valve stem, and the drive ring has an annular groove on its circumference. Guide grooves are opened on both inner walls of the top of the valve body, and a sliding frame is slidably connected in the guide groove. A set of positioning frames is fixedly connected to one side of the sliding frame. A scale line for use with the positioning frame is provided on one side of the valve body. One side of the sliding frame is located in the annular groove and slidably connected to the annular groove. By installing the sliding frame on one side of the valve stem, when the valve stem moves up and down, the sliding frame can be driven to move through the annular groove, and the sliding frame drives the positioning frame to move, thus making it convenient for people to observe the opening and closing status of the valve body.

[0012] In one possible design, a lever is rotatably connected to the bottom of the drive ring, a first tension spring is fixedly connected between the lever and the drive ring, a positioning rod for positioning the lever is fixedly connected to the bottom of the drive ring, and multiple sets of sensing mechanisms are provided between the inner walls on both sides of the top of the valve body.

[0013] In one possible design, the sensing mechanism includes a mounting plate fixedly connected between the inner walls of both sides of the valve body. A through wedge block is slidably connected to one side of the mounting plate, and a horizontal plate is fixedly connected to one side of the wedge block. A second tension spring is fixedly connected between the horizontal plate and the mounting plate. A sounding plate is fixedly connected to the top of the mounting plate, and a vertical plate is fixedly connected to the top of the wedge block. A top rod that works with the sounding plate is fixedly connected to one side of the vertical plate. By setting up the sensing mechanism, sound is generated by impacting the sounding plate. In conjunction with the multi-stage pressure reduction process, this serves as a reminder to people, making it easy for them to understand the progress of the pressure reduction.

[0014] In one possible design, one side of the actuating frame is rotatably connected to a ball bearing that engages with a wedge block.

[0015] In one possible design, packing material for sealing the valve stem is provided between the valve stem and the valve body.

[0016] In use, the medium enters the valve body through the inlet pipe and then exits through the outlet pipe. When closing the valve body, turning the handwheel drives the valve stem downwards, causing the plug to enter the auxiliary hole. First, the primary outlet is blocked by the retaining ring. The medium then enters the valve body through the secondary outlet and the tertiary outlet pipe. Turning the valve stem again causes the plug to continue descending, blocking the auxiliary hole with multiple plugs. At this point, the medium enters the valve body through the perforation in the tertiary outlet pipe. Finally, the plugs and the tertiary outlet pipe block the auxiliary hole and the main hole respectively, thus completing the multi-stage pressure reduction operation. As the valve stem moves up and down, it also drives the drive ring to move. The drive ring drives the sliding frame to move through the ring groove, and the sliding frame drives the positioning frame to move, making it easier for people to observe the closed state of the valve body. When the valve stem moves down to reduce pressure at different stages, it also drives the actuating frame to move. After the actuating frame contacts the wedge block, it pushes the wedge block to one side. Then, after the actuating frame disengages from the wedge block, the wedge block returns to its original position under the pull of the second tension spring, and drives the top rod to strike the soundboard, thus producing a sound. This multi-stage pressure reduction process serves as a reminder to people. When the drive ring moves up, the actuating frame can rotate to facilitate resetting.

[0017] The embodiments of the present invention have the following beneficial effects:

[0018] In this invention, the use of the plug, the three-stage water outlet pipe and the retaining ring in combination enables the valve body to undergo multi-stage pressure reduction through the primary outlet, the secondary outlet and the tertiary outlet pipe when the valve body is closed, before the valve body is closed. This reduces the difficulty of closing, avoids water hammer effect and improves the service life of the valve body.

[0019] In this invention, by installing a sliding bracket on one side of the valve stem, the sliding bracket can be moved through the annular groove when the valve stem moves up and down. The sliding bracket then moves the positioning bracket, making it easier for people to observe the opening and closing status of the valve body.

[0020] In this invention, the sensor mechanism enables the sound to be generated by the impact of the soundboard. This, combined with the multi-stage voltage reduction process, serves as a reminder to people, making it easy for them to understand the progress of the voltage reduction.

[0021] In this invention, the valve body can undergo multi-stage pressure reduction before closing, reducing the difficulty of closing, avoiding water hammer effect, and improving the service life of the valve body. At the same time, it allows people to easily observe the opening and closing status of the valve body, and can also remind people through automatic sound in conjunction with the multi-stage pressure reduction process, so that people can understand the progress of pressure reduction.

[0022] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the present invention;

[0025] Figure 2 This is a cross-sectional structural diagram of an embodiment of the present invention;

[0026] Figure 3 This is a partial structural diagram of an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the drive ring mounting structure according to an embodiment of the present invention;

[0028] Figure 5 This is an embodiment of the present invention. Figure 4 A magnified structural diagram of point A in the middle.

[0029] In the diagram: 1. Valve body; 2. Inlet pipe; 3. Outlet pipe; 4. Retaining ring; 5. Auxiliary hole; 6. Main hole; 7. Valve stem; 8. Handwheel; 9. Intermediate frame; 10. Plug; 11. Primary outlet; 12. Secondary outlet; 13. Tertiary outlet pipe; 14. Guide rail; 15. Slide rod; 16. Drive ring; 17. Guide groove; 18. Sliding frame; 19. Positioning frame; 20. Actuating frame; 21. First tension spring; 22. Positioning rod; 23. Mounting plate; 24. Wedge block; 25. Horizontal plate; 26. Second tension spring; 27. Top rod; 28. Sounder; 29. ​​Ball bearing; 30. Vertical plate. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] In the description of this invention, it should be understood that the terms "opening", "upper", "middle", "length", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0032] To keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of known functions and known components are omitted.

[0033] Example 1

[0034] Please see Figures 1-5 As shown, this embodiment provides a multi-stage pressure reducing valve, including: a valve body 1, with an inlet pipe 2 and an outlet pipe 3 respectively provided at the bottom and one side of the valve body 1, the inlet pipe 2 and the outlet pipe 3 being used for the flow of the medium; a through valve stem 7 inserted into the top of the valve body 1, with packing for sealing the valve stem 7 between the valve stem 7 and the valve body 1; an intermediate frame 9 fixedly connected to the bottom of the valve stem 7, with multiple cone-shaped plugs 10 fixed around the intermediate frame 9, each plug 10 having a cavity inside, the circumference of which is... Two sets of through-hole primary outlets 11 and secondary outlets 12 are provided respectively. The primary outlets 11 are located below the secondary outlets 12 and there are more primary outlets 11 than secondary outlets 12. The different number of primary outlets 11 and secondary outlets 12 facilitates graded pressure reduction. By using the primary outlets 11, secondary outlets 12 and tertiary outlet pipes 13, the valve body 1 can be depressurized in multiple stages before the valve body 1 is closed, which reduces the difficulty of closing, avoids water hammer effect, and improves the service life of the valve body 1.

[0035] The bottom of the intermediate frame 9 is fixedly connected to a three-stage water outlet pipe 13. The three-stage water outlet pipe 13 has two sets of perforations around its circumference. The two sets of perforations are opened in the same way as the first-stage water outlet 11 and the second-stage water outlet 12.

[0036] A retaining ring 4 is fixedly connected to the inner circumference of the water inlet pipe 2. A through main hole 6 is provided in the center of the retaining ring 4. The main hole 6 is used in conjunction with the three-stage water outlet pipe 13. A number of through auxiliary holes 5 are provided on the surface of the retaining ring 4. The auxiliary holes 5 are used in conjunction with the plugs 10 respectively.

[0037] Reference Figure 2 A handwheel 8 is rotatably connected to the top of the valve body 1. The valve stem 7 is threaded through the handwheel 8. Rotating the handwheel 8 drives the valve stem 7 to move downward, making it convenient for people to drive the valve stem 7.

[0038] Example 2

[0039] Improvements based on Example 1: See Appendix Figures 1-5 ,

[0040] Reference Figure 3 Two guide rails 14 are fixedly connected to the inner circumference of the valve body 1, and two slide rods 15 are fixedly connected to both sides of the intermediate frame 9. The two slide rods 15 are slidably connected to the two guide rails 14 respectively. The guide rails 14 and slide rods 15 play a guiding role in the movement of the intermediate frame 9.

[0041] Reference Figure 4A drive ring 16 is fixedly connected to the circumference of the valve stem 7. The circumference of the drive ring 16 is provided with an annular groove. Guide grooves 17 are provided on both inner walls of the top of the valve body 1. A sliding frame 18 is slidably connected in the guide groove 17. A set of positioning frames 19 is fixedly connected to one side of the sliding frame 18. A scale line is provided on one side of the valve body 1 to cooperate with the positioning frame 19. One side of the sliding frame 18 is located in the annular groove and is slidably connected to the annular groove. When the valve stem 7 moves up and down, it also drives the drive ring 16 to move. The drive ring 16 drives the sliding frame 18 to move through the annular groove. The sliding frame 18 drives the positioning frame 19 to move, which makes it convenient for people to observe the closed state of the valve body 1.

[0042] Reference Figure 5 The bottom of the drive ring 16 is rotatably connected to the actuating frame 20. The actuating frame 20 and the drive ring 16 are fixedly connected to the first tension spring 21. The bottom of the drive ring 16 is fixedly connected to the positioning rod 22 for positioning the actuating frame 20. The first tension spring 21 is used to maintain the angle of the actuating frame 20. At the same time, the positioning rod 22 is used to make the actuating frame 20 only able to rotate in one direction. Multiple sets of sensing mechanisms are provided between the inner walls on both sides of the top of the valve body 1.

[0043] Reference Figure 5 The sensing mechanism includes a mounting plate 23, which is fixedly connected between the inner walls of both sides of the valve body 1. A through wedge block 24 is slidably connected to one side of the mounting plate 23. A horizontal plate 25 is fixedly connected to one side of the wedge block 24. A second tension spring 26 is fixedly connected between the horizontal plate 25 and the mounting plate 23. A sounding plate 28 is fixedly connected to the top of the mounting plate 23. A vertical plate 30 is fixedly connected to the top of the wedge block 24. A push rod 27 that works with the sounding plate 28 is fixedly connected to one side of the vertical plate 30. The push rod 27 strikes the sounding plate 28, thereby producing a sound. This, combined with the multi-stage pressure reduction process, serves as a reminder to people. When the drive ring 16 moves upward, the toggle bracket 20 can rotate for easy reset.

[0044] Reference Figure 5 One side of the actuating frame 20 is rotatably connected to a ball bearing 29 that works with the wedge block 24, thereby reducing the friction between the actuating frame 20 and the wedge block 24.

[0045] It should be noted that in the description of this specification, descriptions such as "first" and "second" are only used to distinguish the features and do not have any actual order or directional meaning. This application is not limited to this.

[0046] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-stage pressure reducing valve, characterized in that, include: The valve body (1) has an inlet pipe (2) and an outlet pipe (3) at its bottom and one side, respectively. A through valve stem (7) is inserted into the top of the valve body (1). An intermediate frame (9) is fixedly connected to the bottom of the valve stem (7). Multiple plugs (10) with conical bottoms are fixed around the intermediate frame (9). Each plug (10) has a cavity inside. Two sets of through primary outlets (11) and secondary outlets (12) are provided on the circumference of each cavity. The primary outlets (11) are located below the secondary outlets (12) and there are more of them than the secondary outlets (12). The bottom of the intermediate frame (9) is fixedly connected to a three-stage water outlet pipe (13), and the three-stage water outlet pipe (13) has two sets of perforations around its circumference. The inner circumference of the water inlet pipe (2) is fixedly connected to a retaining ring (4). The center of the retaining ring (4) is provided with a through main hole (6). The main hole (6) is used in conjunction with the three-stage water outlet pipe (13). The surface of the retaining ring (4) is provided with multiple through auxiliary holes (5). The auxiliary holes (5) are used in conjunction with the plugs (10).

2. The multi-stage pressure reducing valve as described in claim 1, characterized in that, A handwheel (8) is rotatably connected to the top of the valve body (1), and the valve stem (7) is threaded through the handwheel (8).

3. The multi-stage pressure reducing valve as described in claim 1, characterized in that, Two guide rails (14) are fixedly connected to the inner circumference of the valve body (1), and two slide rods (15) are fixedly connected to both sides of the intermediate frame (9). The two slide rods (15) are slidably connected to the two guide rails (14) respectively.

4. A multi-stage pressure reducing valve as described in claim 1, characterized in that, A drive ring (16) is fixedly connected to the circumference of the valve stem (7). The drive ring (16) has an annular groove on its circumference. Guide grooves (17) are opened on both sides of the top of the valve body (1). A sliding frame (18) is slidably connected in the guide groove (17). A set of positioning frames (19) is fixedly connected to one side of the sliding frame (18). A scale line is provided on one side of the valve body (1) to cooperate with the positioning frame (19). One side of the sliding frame (18) is located in the annular groove and is slidably connected to the annular groove.

5. A multi-stage pressure reducing valve as described in claim 4, characterized in that, The bottom of the drive ring (16) is rotatably connected to a toggle frame (20), and a first tension spring (21) is fixedly connected between the toggle frame (20) and the drive ring (16). The bottom of the drive ring (16) is fixedly connected to a positioning rod (22) for positioning the toggle frame (20), and multiple sets of sensing mechanisms are provided between the inner walls on both sides of the top of the valve body (1).

6. A multi-stage pressure reducing valve as described in claim 5, characterized in that, The sensing mechanism includes a mounting plate (23), which is fixedly connected between the inner walls of both sides of the valve body (1). A through wedge block (24) is slidably connected to one side of the mounting plate (23), and a horizontal plate (25) is fixedly connected to one side of the wedge block (24). A second tension spring (26) is fixedly connected between the horizontal plate (25) and the mounting plate (23). A sounding plate (28) is fixedly connected to the top of the mounting plate (23), and a vertical plate (30) is fixedly connected to the top of the wedge block (24). A top rod (27) that cooperates with the sounding plate (28) is fixedly connected to one side of the vertical plate (30).

7. A multi-stage pressure reducing valve as described in claim 6, characterized in that, One side of the actuating frame (20) is rotatably connected to a ball bearing (29) that engages with a wedge block (24).

8. A multi-stage pressure reducing valve as described in claim 1, characterized in that, The valve stem (7) and the valve body (1) are provided with a packing material for sealing the valve stem (7).

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