Full-water-pressure-section high-precision electromagnetic pressure reducing valve

Abstract

The utility model provides a full water pressure section high-precision electromagnetic pressure reducing valve, which belongs to the technical field of pressure reducing valves and comprises an electromagnetic valve component, a pre-pressure-reducing component and a main pressure reducing component, the electromagnetic valve component comprises a first inlet end and a first outlet end, and the pre-pressure-reducing component comprises a second valve body, a pressure reducing cover and a first spring. The main pressure reduction assembly comprises a third valve body, an upper cover, a movable rod, a diaphragm and a second spring, the third valve body comprises a second flow channel opening, and when the pressure of the second cavity rises, the second valve body moves towards the first flow channel opening to enable the water passing amount of the first flow channel opening to be reduced. The movable rod moves upwards, so that the water passing amount of the second runner opening is reduced; according to the pressure reducing valve, a double pressure reducing structure is adopted, the pressure and flow fluctuation in the whole water pressure range of 0-1.2 MPa is small, and the pressure stability can be improved to be within 5 mL / min compared with a pressure reducing valve of a single pressure reducing structure.

Description

Technical Field

[0001] This utility model relates to the field of pressure reducing valve technology, specifically to a high-precision electromagnetic pressure reducing valve for the entire water pressure range. Background Technology

[0002] A pressure reducing valve is a device used to regulate and control fluid pressure, widely used in various industrial and civil fields. Its main function is to reduce high-pressure fluids to the required low pressure to ensure the safe operation of downstream equipment, pipelines, or systems. The pressure reducing valve automatically adjusts the flow rate and pressure of the fluid through an internal spring and valve core combination, thereby maintaining a constant set value. Common applications include water supply systems, gas transmission, and steam systems. In the field of mechanical engineering, selecting a suitable pressure reducing valve is crucial for improving system stability and efficiency, while also extending the service life of equipment.

[0003] Traditional pressure reducing valves are generally single-pressure reducing structures, and their pressure and flow rates fluctuate significantly within the full water pressure range of 0 to 1.2 MPa, with fluctuations typically within 60 mL / min. This makes them unsuitable for use in products with higher requirements for flow and pressure accuracy. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a high-precision electromagnetic pressure reducing valve for the entire water pressure range.

[0005] The technical solution adopted by this utility model is as follows: This application provides a high-precision electromagnetic pressure reducing valve for the entire water pressure range, comprising:

[0006] A solenoid valve assembly includes a first valve body, the first valve body including a first inlet end and a first outlet end;

[0007] The pre-pressure reducing assembly includes a second valve body, a pressure reducing cover, and a first spring. The second valve body includes a second inlet end and a second outlet end. The second inlet end is connected to the first outlet end and forms a first cavity. The pressure reducing cover is sleeved on the first outlet end and slidably disposed within the first cavity. The first spring abuts between the pressure reducing cover and the first valve body. The pressure reducing cover is circumferentially provided with a plurality of first flow channels. When the pressure on the rear side of the pressure reducing cover rises, it moves toward the first outlet end, thereby reducing the flow rate of the first flow channels.

[0008] The main pressure reducing assembly includes a third valve body, a top cover, a movable rod, a diaphragm, and a second spring. The third valve body includes a third inlet end, a second flow channel opening, and a third outlet end. The edge of the diaphragm abuts between the top cover and the third valve body, forming a second cavity between them. The movable rod is connected to the diaphragm and moves with it. The second spring abuts between the top cover and the diaphragm. The movable rod includes a sealing part located below the second flow channel opening and capable of sealing with it. When the pressure in the second cavity rises, the movable rod moves upward, reducing the flow rate through the second flow channel opening.

[0009] In some embodiments, the first outlet end is provided with a cylindrical portion and a first conical portion, the first conical portion gradually narrows along the direction of the second outlet end, the pressure relief cover includes a channel portion disposed near the first outlet end and a disc portion disposed near the second outlet end, a plurality of first flow channels are disposed circumferentially along the inner wall of the channel portion and penetrate the disc portion, and the cylindrical portion and the first conical portion extend into the channel portion.

[0010] In some embodiments, a first annular groove is provided on the first outlet end, the first annular groove is located on the front side of the cylindrical part, a first sealing ring and a channel portion are provided in the first annular groove to form a seal, and a second annular groove is provided on the outer wall of the pressure relief cover, a second sealing ring and a second inlet end are provided in the second annular groove to form a seal.

[0011] In some embodiments, the second valve body and the third valve body are integrated.

[0012] In some embodiments, the main pressure reducing assembly further includes a base, which is disposed at the lower end of the third valve body and has a positioning hole thereon. The lower end of the movable rod is slidably disposed in the positioning hole. A third sealing ring is disposed between the base and the third valve body, and a fourth sealing ring is disposed between the movable rod and the positioning hole.

[0013] In some embodiments, the sealing portion is conical and gradually tapers toward the second cavity.

[0014] In some embodiments, an upper positioning plate and a lower positioning plate are respectively provided on the movable rod above and below the diaphragm, the upper cover and the third valve body are threadedly connected, and an adjustment port is provided on the upper cover, and the second spring abuts between the upper cover and the upper positioning plate.

[0015] In some embodiments, the upper positioning plate is provided with a first spring positioning groove, and the upper cover is provided with a second spring positioning groove.

[0016] In some embodiments, the first valve body is provided with a first flow channel, an annular flow channel, a second flow channel and a third flow channel. One end of the first flow channel is connected to a first inlet end and the other end is connected to the annular flow channel. The second flow channel is coaxially disposed in the annular flow channel and perpendicular to the first flow channel. One end of the third flow channel is connected to the second flow channel and the other end is connected to a first outlet end.

[0017] In some embodiments, the solenoid valve assembly further includes a sealing bowl, a movable seat, and a connecting seat. The edge of the sealing bowl abuts between the connecting seat and the first valve body. The sealing bowl is provided with a through hole. The movable seat includes a connecting post portion that extends through the through hole into a second flow channel. The upper end of the second flow channel is provided with a valve seat portion that can seal and cooperate with the sealing bowl.

[0018] The beneficial effects of this utility model are as follows: This utility model achieves the function of dual pressure reduction through two structures: pre-pressure reduction and main pressure reduction. The pressure and flow fluctuations are small in the full water pressure range of 0 to 1.2 MPa. The pressure stability can be improved to within 5 mL / min compared with the pressure reducing valve with single pressure reducing structure, which meets the requirements of products with higher flow and pressure accuracy. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0020] Figure 1 This is a cross-sectional view of a high-precision electromagnetic pressure reducing valve for the entire water pressure range according to this utility model;

[0021] Figure 2 This is a schematic diagram of a high-precision electromagnetic pressure reducing valve for the entire water pressure range according to this utility model;

[0022] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 This is a partial cross-sectional view of the pre-decompression component in this utility model. Figure 1 ;

[0024] Figure 5 This is a partial cross-sectional view of the main pressure-reducing component in this utility model;

[0025] Figure 6 This is a partial cross-sectional view of the pre-decompression component in this utility model. Figure 2 ;

[0026] Figure 7 This is a cross-sectional view of the pressure relief cover in this utility model;

[0027] Figure 8 This is a cross-sectional view of the first valve body in this utility model. Detailed Implementation

[0028] The following description provides specific application scenarios and requirements for this specification, intended to enable those skilled in the art to make and use the contents of this specification. Various partial modifications to the disclosed embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments and applications without departing from the spirit and scope of this specification. Therefore, this specification is not limited to the embodiments shown, but rather to the widest scope consistent with the claims.

[0029] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "longitudinal", "lateral", "radial", "length", "width", "thickness", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element or component to have a specific orientation, or to be constructed and operated in a specific orientation.

[0030] Secondly, the terms "first," "second," and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different components and should not be construed as limiting the embodiments of this application.

[0031] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral constructions; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or internal connections between two devices, components, or parts.

[0032] Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] Regarding the accompanying drawings of this application, it should be clearly understood that the drawings are for illustrative and descriptive purposes only and are not intended to limit the scope of this specification. It should also be understood that the drawings are not necessarily drawn to scale.

[0034] like Figures 1 to 8As shown in the figure, this specification provides a high-precision electromagnetic pressure reducing valve for the entire water pressure range, including a solenoid valve assembly 1, a pre-pressure reducing assembly 2, and a main pressure reducing assembly 3. It achieves dual pressure reduction function through the pre-pressure reducing and main pressure reducing structures. The pressure and flow fluctuations are small in the full water pressure range of 0 to 1.2 MPa. The pressure stability can be improved to within 5 mL / min compared with the pressure reducing valve with a single pressure reducing structure, which meets the requirements of products with higher flow and pressure accuracy.

[0035] In some embodiments, the solenoid valve assembly 1 includes a first valve body 10, a sealing bowl 15, a movable seat 16, and a connecting seat 17. The first valve body 10 includes a first inlet end 100 and a first outlet end 101. The first valve body 10 is provided with a first flow channel 11, an annular flow channel 12, a second flow channel 13, and a third flow channel 14. One end of the first flow channel 11 is connected to the first inlet end 100, and the other end is connected to the annular flow channel 12. The second flow channel 13 is coaxially disposed in the annular flow channel 12 and perpendicular to the first flow channel 11. One end of the third flow channel 14 is connected to the second flow channel 13, and the other end is connected to the first outlet end 101. Through this flow channel structure design, the space utilization of the first valve body 10 is optimized, and efficient fluid switching can be achieved within a limited volume.

[0036] The edge of the sealing bowl 15 presses against the connecting seat 17 and the first valve body 10. The sealing bowl 15 is provided with a through hole 150. The movable seat 16 includes a connecting post 160. The connecting post 160 extends through the through hole 150 into the second flow channel 13. The sealing bowl 15 and the connecting post 160 are fixed together. The upper end of the second flow channel 13 is provided with a valve seat 130, which can seal and cooperate with the sealing bowl 15. Preferably, the end of the valve seat 130 is arc-shaped, so that it will not cause damage to the sealing bowl 15 when it abuts against it.

[0037] Furthermore, the connecting column 160 gradually narrows towards the bottom of the second flow channel 13, which can reduce the water flow when the movable seat 16 moves up and down, thereby reducing the water impact.

[0038] Furthermore, a first channel 161 is axially provided on the movable seat 16, and the inner diameter of the lower end of the first channel 161 is larger than the inner diameter of its upper end, in order to balance the pressure.

[0039] It should be understood that the solenoid valve assembly 1 also includes an electromagnetic coil and a third spring for driving. When the electromagnetic coil of the solenoid valve is energized, a magnetic field is generated, which attracts the moving seat 16 to move upward, and the sealing bowl 15 opens relative to the valve seat 130, allowing fluid to flow through the valve. When the solenoid valve is de-energized, the force of the third spring will reset the moving seat 16 downward, and the sealing bowl 15 closes relative to the valve seat 130, stopping the fluid flow.

[0040] In some embodiments, the pre-pressure reducing assembly 2 includes a second valve body 20, a pressure reducing cover 21, and a first spring 22. The second valve body 20 includes a second inlet end 200 and a second outlet end 201. The second inlet end 200 is connected to the first outlet end 101 and forms a first cavity 23. The pressure reducing cover 21 is sleeved on the first outlet end 101 and slidably disposed within the first cavity 23. The first spring 22 abuts between the pressure reducing cover 21 and the first valve body 10. The pressure reducing cover 21 is circumferentially provided with a plurality of first flow channels 210. When the pressure on the rear side of the pressure reducing cover 21 rises, it moves toward the first outlet end 101, thereby reducing the flow rate of the first flow channels 210, as shown in the attached figure. Figure 3 As shown, the decompression shroud 21 moves to the left, forming the first decompression structure.

[0041] Specifically, the first outlet end 101 is provided with a cylindrical portion 1010 and a first conical portion 1011, the first conical portion 1011 gradually narrows along the direction of the second outlet end 201, the pressure relief cover 21 includes a channel portion 211 near the first outlet end 101 and a disc portion 212 near the second outlet end 201, and a plurality of first flow channels 210 are arranged circumferentially along the inner wall of the channel portion 211 and penetrate the disc portion 212, such as Figure 6 As shown, four first flow channels 210 are evenly arranged to reduce eddies and turbulence, and improve the stability and efficiency of fluid flow. The cylindrical part 1010 and the first conical part 1011 extend into the channel part 211.

[0042] Furthermore, a first annular groove 1012 is provided on the first outlet end 101. The first annular groove 1012 is located on the front side of the cylindrical part 1010. A first sealing ring 4 and a channel part 211 are provided in the first annular groove 1012 to form a seal. A second annular groove 213 is provided on the outer wall of the pressure relief cover 21. A second sealing ring 5 and a second inlet end 200 are provided in the second annular groove 213 to form a seal. In this way, a double seal is formed to ensure that the medium is transported along the designated flow channel.

[0043] Furthermore, a second channel 2120 is provided in the middle of the disc body 212 for balancing pressure.

[0044] In some embodiments, the main pressure reducing assembly 3 includes a third valve body 30, a top cover 31, a movable rod 32, a diaphragm 33, a second spring 34, and a base 36. The third valve body 30 includes a third inlet end 300, a second flow channel 301, and a third outlet end 302. The edge of the diaphragm 33 presses against the top cover 31 and the third valve body 30, forming a second cavity 35 between them. The movable rod 32 is connected to the diaphragm 33 and moves with the diaphragm 33. The second spring 34 abuts against the top cover 31 and the diaphragm 33. The movable rod 32 includes a sealing part 320 located below the second flow channel 301 and capable of sealing with it. When the pressure in the second cavity 35 rises, the movable rod 32 moves upward, reducing the flow rate through the second flow channel 301. This structure forms a second pressure reducing structure, which can accurately control the fluid flow rate and avoid system instability caused by overflow.

[0045] Preferably, the sealing part 320 is conical and gradually tapers towards the second cavity 35, i.e., inverted conical. This not only helps to fit tightly with the second flow channel 301 and reduce water leakage, but also reduces the resistance when the fluid passes through and improves the efficiency of fluid flow.

[0046] The base 36 is located at the lower end of the third valve body 30 and has a positioning hole 360. The lower end of the movable rod 32 is slidably located in the positioning hole 360, which improves the stability of the movable rod 32 when it moves. A third sealing ring 6 is provided between the base 36 and the third valve body 30, and a fourth sealing ring 7 is provided between the movable rod 32 and the positioning hole 360 ​​to prevent the medium from leaking at the base 36.

[0047] The movable rod 32 is provided with an upper positioning plate 37 and a lower positioning plate 38 located above and below the diaphragm 33, respectively, so that the diaphragm 33 is firmly fixed to the movable rod 32. The second spring 34 abuts between the upper cover 31 and the upper positioning plate 37 to prevent the second spring 34 from damaging the diaphragm 33.

[0048] The upper cover 31 and the third valve body 30 are threaded together, and an adjustment port 310 is provided on it. The adjustment port 310 is a conventional disassembly port such as a slotted hole or a cross-shaped hole. The preload force of the second spring 34 can be adjusted by rotating the upper cover 31.

[0049] The upper positioning plate 37 is provided with a first spring positioning groove 370, and the upper cover 31 is provided with a second spring positioning groove 311. The upper and lower ends of the second spring 34 are respectively embedded in the first spring positioning groove 370 and the second spring positioning groove 311 to ensure its stability during operation.

[0050] Furthermore, the movable rod 32 is provided with a third channel 321, which connects to the positioning hole 360 ​​and the second cavity 35 for balancing pressure.

[0051] In some embodiments, the second valve body 20 and the third valve body 30 are integral, i.e., formed on a single part.

[0052] With the above settings, the two different pressure-reducing structures can adapt to more installation occasions, improving the practicality of the product.

[0053] In summary, after reading this detailed disclosure, those skilled in the art will understand that the foregoing detailed disclosure is presented by way of example only and is not restrictive. Although not explicitly stated herein, those skilled in the art will understand that the requirements of this application encompass various reasonable changes, improvements, and modifications to the embodiments. These changes, improvements, and modifications are intended to be made by this application and are within the spirit and scope of the exemplary embodiments of this application.

[0054] Furthermore, it should be understood that in the foregoing description of the embodiments of this application, various features are combined in a single embodiment, drawing, or description for the purpose of simplifying the understanding of a feature. However, this does not mean that the combination of these features is necessary, and those skilled in the art may readily identify some of the devices as separate embodiments when reading this application. That is, the embodiments in this application can also be understood as an integration of multiple sub-embodiments. It is also valid when each sub-embodiment contains fewer than all the features of a single foregoing disclosed embodiment.

[0055] Finally, it should be understood that the embodiments disclosed herein are illustrative of the principles of the embodiments of this application. Other modified embodiments are also within the scope of this application. Therefore, the embodiments disclosed herein are merely examples and not limitations. Those skilled in the art can adopt alternative configurations to implement the applications in this application based on the embodiments in this application. Therefore, the embodiments of this application are not limited to the embodiments precisely described in the application.

Claims

1. A high-precision electromagnetic pressure reducing valve for the entire water pressure range, characterized in that, include: A solenoid valve assembly includes a first valve body, the first valve body including a first inlet end and a first outlet end; The pre-pressure reducing assembly includes a second valve body, a pressure reducing cover, and a first spring. The second valve body includes a second inlet end and a second outlet end. The second inlet end is connected to the first outlet end and forms a first cavity. The pressure reducing cover is sleeved on the first outlet end and slidably disposed within the first cavity. The first spring abuts between the pressure reducing cover and the first valve body. The pressure reducing cover is circumferentially provided with a plurality of first flow channels. When the pressure on the rear side of the pressure reducing cover rises, it moves toward the first outlet end, thereby reducing the flow rate of the first flow channels. The main pressure reducing assembly includes a third valve body, a top cover, a movable rod, a diaphragm, and a second spring. The third valve body includes a third inlet end, a second flow channel opening, and a third outlet end. The edge of the diaphragm abuts between the top cover and the third valve body, forming a second cavity between them. The movable rod is connected to the diaphragm and moves with it. The second spring abuts between the top cover and the diaphragm. The movable rod includes a sealing part located below the second flow channel opening and capable of sealing with it. When the pressure in the second cavity rises, the movable rod moves upward, reducing the flow rate through the second flow channel opening.

2. The high-precision electromagnetic pressure reducing valve for the entire water pressure range according to claim 1, characterized in that, The first outlet end is provided with a cylindrical part and a first conical part. The first conical part gradually narrows along the direction of the second outlet end. The pressure relief cover includes a channel part provided near the first outlet end and a disc part provided near the second outlet end. A plurality of first flow channels are arranged circumferentially along the inner wall of the channel part and penetrate the disc part. The cylindrical part and the first conical part extend into the channel part.

3. The high-precision electromagnetic pressure reducing valve for the entire water pressure range according to claim 2, characterized in that, A first annular groove is provided on the first outlet end, the first annular groove is located on the front side of the cylindrical part, a first sealing ring and a channel are provided in the first annular groove to form a seal, and a second annular groove is provided on the outer wall of the pressure relief cover, a second sealing ring and a second inlet end are provided in the second annular groove to form a seal.

4. The high-precision electromagnetic pressure reducing valve for the entire water pressure range according to claim 1, characterized in that, The second valve body and the third valve body are integrated.

5. A high-precision electromagnetic pressure reducing valve for the entire water pressure range according to claim 1, characterized in that, The main pressure reducing assembly also includes a base, which is disposed at the lower end of the third valve body and has a positioning hole. The lower end of the movable rod is slidably disposed in the positioning hole. A third sealing ring is disposed between the base and the third valve body, and a fourth sealing ring is disposed between the movable rod and the positioning hole.

6. The high-precision electromagnetic pressure reducing valve for the entire water pressure range according to claim 1, characterized in that, The sealing part is conical and gradually tapers towards the second cavity.

7. The high-precision electromagnetic pressure reducing valve for the entire water pressure range according to claim 1, characterized in that, The movable rod is provided with an upper positioning plate and a lower positioning plate located above and below the diaphragm, respectively. The upper cover and the third valve body are threaded together and have an adjustment port. The second spring abuts between the upper cover and the upper positioning plate.

8. A high-precision electromagnetic pressure reducing valve for the entire water pressure range according to claim 7, characterized in that, The upper positioning plate is provided with a first spring positioning groove, and the upper cover is provided with a second spring positioning groove.

9. A high-precision electromagnetic pressure reducing valve for the entire water pressure range according to claim 1, characterized in that, The first valve body is provided with a first flow channel, an annular flow channel, a second flow channel and a third flow channel. One end of the first flow channel is connected to the first inlet end and the other end is connected to the annular flow channel. The second flow channel is coaxially arranged in the annular flow channel and perpendicular to the first flow channel. One end of the third flow channel is connected to the second flow channel and the other end is connected to the first outlet end.

10. A high-precision electromagnetic pressure reducing valve for the entire water pressure range according to claim 9, characterized in that, The solenoid valve assembly also includes a sealing bowl, a movable seat, and a connecting seat. The edge of the sealing bowl abuts against the connecting seat and the first valve body. The sealing bowl is provided with a through hole. The movable seat includes a connecting post, which extends through the through hole into a second flow channel. The upper end of the second flow channel is provided with a valve seat that can seal and cooperate with the sealing bowl.

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