Pressure reducing valve

Abstract

The utility model discloses a pressure reducing valve, it includes valve body subassembly and valve core frame, be equipped with valve cavity in valve body subassembly, valve core frame fixed mounting in valve cavity, this valve core frame has the water pass hole, and the both sides of water pass hole form valve front pressure area and valve rear pressure area respectively, and the port of water pass hole towards valve front pressure area forms first port, the port of water pass hole towards valve rear pressure area forms second port, still be equipped with the pressure guide channel in valve core frame, and this pressure guide channel has the first pressure guide port of inlaying valve rear pressure area, along the axial direction of valve core frame and towards valve rear pressure area's direction, the axial height of first pressure guide port is greater than the axial height of second port. The utility model discloses first pressure guide port and second port form the height difference in the axial direction of valve core frame, can reduce the influence that the pressure guide channel directly receives the water flow impact at water pass hole, make the fluctuation of impact water flow to valve rear pressure reduce, and then reduce the shaking of valve core, and reduce the noise.

Description

Technical Field

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

[0002] The operation of a piston-type pressure reducing valve is controlled by the downstream pressure. The upstream and downstream pressures are roughly divided by the dashed line A; the pressure closer to the inlet is the upstream pressure, and the pressure closer to the outlet is the downstream pressure. When the downstream pressure increases, the valve opening decreases; when the downstream pressure decreases, the valve opening increases to meet the control requirements.

[0003] Reference Figure 1 Existing pressure reducing valves typically include a valve body 1', a valve core frame 2' fixed within the valve body 1', and a valve core 3' disposed within the valve core frame 2' and axially movable relative to the valve core frame 2' to change the medium passage and medium flow rate. A water passage hole is provided on the side of the valve core frame 2', and a water outlet hole 20' communicating with the water passage hole and a pressure guiding hole 21' for forming the downstream pressure are provided at the bottom of the valve core frame. As shown in the figure, the valve core includes, from top to bottom, a main body 31', a connecting section 32', and a valve disc 33'. The connecting section 32' passes through the water outlet hole 20' and forms an annular gap between it and the wall of the water outlet hole 20' for fluid to pass through. Water enters from the water passage hole on the periphery of the valve core frame 2' and then flows out from the gap between the connecting section 32' and the wall of the water outlet hole 20'. The water flow diffuses outwards from the junction of the connecting section 32' and the valve disc 33'. In the prior art, the lower port of the pressure guiding hole 21' is opened on the bottom surface of the valve core frame 2'. It is directly impacted by the water flow at the outlet hole 20', causing the pressure after the valve to fluctuate after being impacted by the water flow, which ultimately causes the valve core 3' to vibrate and generate noise. Utility Model Content

[0004] This utility model provides a pressure reducing valve, the purpose of which is to overcome the problem of excessive noise in existing pressure reducing valves.

[0005] To achieve this objective, the present invention adopts the following technical solution: A pressure reducing valve, comprising: A valve body assembly, wherein a valve cavity is provided within the valve body assembly; A valve core frame is fixedly installed in the valve cavity. The valve core frame has a water passage hole. One side of the water passage hole forms a pressure zone before the valve, and the other side of the water passage hole forms a pressure zone after the valve. The port of the water passage hole facing the pressure zone before the valve forms a first port, and the port of the water passage hole facing the pressure zone after the valve forms a second port. The valve core frame is also provided with a pressure guiding channel, which has a first pressure guiding port extending into the pressure zone after the valve; along the axial direction of the valve core frame and toward the pressure zone after the valve, the axial height of the first pressure guiding port is greater than the axial height of the second port.

[0006] In the recommended embodiment, the pressure reducing valve further includes a valve core that passes through a water passage hole and is axially movable within a valve core frame. The valve core includes a valve disc for adjusting the opening degree. The valve disc is located in the downstream pressure zone and is positioned opposite to the water passage hole. The gap between the valve disc and the water passage hole forms a water passage zone, which extends along the axial direction of the valve core frame and toward the downstream pressure zone. The axial height of the first pressure-conducting port is greater than the axial height of the water passage zone. The greater axial height of the first pressure-conducting port than the water passage zone further reduces the impact of the water flow in the water passage zone on the downstream pressure fluctuation, significantly reducing valve core vibration (specifically, both the vibration frequency and amplitude are significantly reduced), thereby significantly reducing noise.

[0007] In the recommended embodiment, the end face of the valve disc facing the water passage is provided with a sealing gasket. Under certain special operating conditions, the valve disc can be sealed to the water passage, thereby keeping the pressure reducing valve in the closed state.

[0008] In the recommended embodiment, the valve core frame includes an upper collar, a lower collar, and at least two connecting rods. One end of each connecting rod is fixed to the bottom surface of the upper collar, and the other end is fixed to the top surface of the lower collar, with the connecting rods spaced apart from each other. The water passage is located in the middle of the lower collar. The valve core frame also includes at least two extension rods and at least two pressure guiding channels. Each extension rod protrudes from the bottom surface of the lower collar, with one end fixed to the bottom surface of the lower collar and the other end forming the first pressure guiding port. Each pressure guiding channel passes sequentially through the extension rod, the lower collar, the connecting rod, and the upper collar from the corresponding first pressure guiding port. The top surface of the upper collar is provided with a second pressure guiding port. This embodiment uses an upper collar, a lower collar, connecting rods, and extension rods, resulting in high structural reliability.

[0009] In the recommended implementation, the extension rod and the connecting rod are coaxial and correspond one-to-one. The coaxial structure reduces pressure loss and facilitates accurate transmission of pressure downstream of the valve.

[0010] In the recommended embodiment, the valve core holder further includes a pressure guiding sleeve, which is fixed to the upper end of the upper collar. The internal space of the pressure guiding sleeve forms a pressure guiding cavity, and the second pressure guiding port communicates with this cavity. The pressure guiding sleeve is used to seal with the first sealing disc of the valve core, and it can provide guidance for the axial movement of the first sealing disc.

[0011] In the recommended embodiment, a convex ring is fixed to the outer wall of the pressure guide sleeve; the valve body assembly includes a valve body and a valve cover, and the convex ring is fastened between the valve body and the valve cover. The cooperation between the convex ring structure and the valve body assembly ensures that the valve core holder is firmly fixed within the valve cavity.

[0012] In the recommended embodiment, the pressure guide sleeve, convex ring, upper collar, connecting rod, lower collar, and extension rod are integrally formed. The integrally formed valve core frame not only facilitates processing but also ensures high structural reliability.

[0013] In the recommended embodiment, the valve core further includes a first sealing disc, a second sealing disc, and a connecting rod. The first sealing disc, the second sealing disc, the connecting rod, and the valve disc are sequentially and fixedly connected. The first sealing disc is sealed and installed inside the pressure-guiding sleeve, and the second pressure-guiding port faces the first sealing disc. The second sealing disc is sealed and installed inside the upper collar, and the connecting rod passes through the water passage hole. The pressure after the valve acts on the first sealing disc, and the pressure before the valve acts on the second sealing disc. Combined with the spring force of the pressure-reducing valve, the pressure-reducing valve can automatically adjust the outlet water pressure.

[0014] In the recommended embodiment, the second port is provided with an extension ring extending toward the downstream pressure zone of the valve. One end of the extension ring extending into the downstream pressure zone forms a free end, and the end face of the free end is conical. This conical surface creates a line seal between the valve disc and the extension ring, thereby improving the reliability of the seal.

[0015] The beneficial effects of this utility model are: The first pressure guiding port and the second port of this utility model form a height difference in the axial direction of the valve core frame, which can reduce the impact of water flow impact at the water passage on the pressure guiding channel, thereby reducing the fluctuation of the impact water flow on the pressure after the valve, thus reducing the vibration of the valve core and reducing noise. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the existing technology.

[0017] Figure 2 This is a schematic diagram of the pressure reducing valve in Example 1.

[0018] Figure 3 This is a schematic diagram of the valve body assembly.

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the valve core frame.

[0020] Figure 5 This is a three-dimensional structural diagram of the valve core holder.

[0021] Figure 6 This is a schematic diagram of the valve core.

[0022] Figure 7This is a schematic diagram of the structure of Example 2.

[0023] Figure 8 This is a schematic diagram of the structure of Example 3.

[0024] Explanation of reference numerals in the attached drawings: Valve body assembly 1, Valve body 11, Valve cover 12, Valve cavity 10, Inlet 111, Outlet 112, Valve core frame 2, Water passage area 100, Pressure guiding sleeve 21, Upper collar 22, Connecting rod 23, Lower collar 24, Extension rod 25, Protruding ring 26, Pressure guiding chamber 210, Pressure guiding hole 220, Water passage hole 240, Pressure zone before valve 101, Pressure zone after valve 102, First port 241, Second port 242, Pressure guiding channel 200, First pressure guiding port 201, Second pressure guiding port 202, Extension ring 243, Valve core 3, First sealing disc 31, Second sealing disc 32, Connecting rod 33, Valve disc 34, First sealing ring 310, Second sealing ring 320, Sealing gasket 341, Spring 4. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0026] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0029] Example 1 Reference Figure 2 and Figure 3 A pressure reducing valve includes a valve body assembly 1, a valve core frame 2, a valve core 3, and a spring 4. The valve body assembly 1 includes a valve body 11 and a valve cover 12. The left and right ends of the valve body 11 are respectively provided with an inlet 111 and an outlet 112, and the upper end of the valve body 11 is provided with an upper port (not shown in the figure). The valve cover 12 is fixedly connected to the upper port of the valve body 11 by a threaded connection. The space formed by the valve cover 12 and the valve body 11 forms a valve cavity 10 for accommodating the valve core frame 2, the valve core 3, and the spring 4. The valve cavity 10 is located between the inlet 111 and the outlet 112.

[0030] Simultaneously refer to Figure 4 and Figure 5 The valve core frame 2, from top to bottom, includes a pressure guiding sleeve 21, an upper collar 22, at least two connecting rods 23, a lower collar 24, and at least two extension rods 25. A protruding ring 26 is fixed to the outer wall of the pressure guiding sleeve 21. The pressure guiding sleeve 21, protruding ring 26, upper collar 22, connecting rods 23, lower collar 24, and extension rods 25 are integrally formed, which not only facilitates processing but also ensures that the valve core frame 2 has sufficient reliability and can withstand high water pressure.

[0031] As shown in the figure, the convex ring 26 is fastened between the valve body 11 and the valve cover 12, so that the valve core frame 2 is firmly fixed in the valve cavity 10. The lower sleeve 24 is sealed and installed in the valve cavity 10, which divides the valve cavity 10 into a pre-valve pressure zone 101 on one side and a post-valve pressure zone 102 on the other side. Specifically, a water passage hole 240 is provided in the middle of the lower sleeve 24. One side of the water passage hole 240 forms the pre-valve pressure zone 101, and the other side of the water passage hole 240 forms the post-valve pressure zone 102. The port of the water passage hole 240 facing the pre-valve pressure zone 101 forms a first port 241, and the port of the water passage hole 240 facing the post-valve pressure zone 102 forms a second port 242.

[0032] In this embodiment, the pressure guiding sleeve 21 is an annular surrounding wall, and its internal space forms a pressure guiding cavity 210. One end of the upper collar 22 is fixedly connected to the lower end of the pressure guiding sleeve 21, and the upper collar 22 has a pressure guiding hole 220 in the middle.

[0033] As can be seen from the figure, one end of the connecting rod 23 is fixed to the top surface of the lower collar 24, and the other end is fixed to the bottom surface of the upper collar 22. The connecting rods 23 are spaced apart from each other, and the water flow can pass through the gap between the adjacent connecting rods 23. The extension rod 25 protrudes from the bottom surface of the lower collar 24, one end of which is fixed to the lower collar 24, and the other end forms a free end.

[0034] In this embodiment, the valve core frame 2 has four connecting rods 23 and four extension rods 25. To reduce pressure loss, each extension rod 25 and each connecting rod 24 are coaxial and correspond one-to-one. In addition, four pressure guiding channels 200 are provided inside the valve core frame 2. Each pressure guiding channel 200 passes through the extension rod 25, the lower collar 24, the connecting rod 23 and the upper collar 22 in sequence. The pressure guiding channel 200 has a first pressure guiding port 201 and a second pressure guiding port 202. As can be seen from the figure, the free end of the extension rod 25 serves as the first pressure guiding port 201 of the pressure guiding channel 200. The first pressure guiding port 201 extends into the pressure zone 102 after the valve. The top surface of the upper collar 22 is provided with a second pressure guiding port 202, which communicates with the pressure guiding cavity 210 of the pressure guiding sleeve 21.

[0035] Simultaneously refer to Figure 6 The pressure reducing valve also includes a valve core 3 that is axially movable and installed in the valve core frame 2. The valve core 3 includes a first sealing disc 31, a second sealing disc 32, a connecting rod 33, and a valve disc 34 for adjusting the opening. The first sealing disc 31, the second sealing disc 32, the connecting rod 33, and the valve disc 34 are sequentially fixedly connected. The first sealing disc 31 and the second sealing disc 32 are usually circular, and the area of ​​the first sealing disc 31 is larger than the area of ​​the second sealing disc 32.

[0036] The first sealing disc 31 has a first sealing ring 310 on its side, which is axially movable and sealed within the pressure guide sleeve 21. After installation, the second pressure guide port 202 faces the first sealing disc 31. The second sealing disc 32 has a second sealing ring 320 on its side, which is axially movable and sealed within the upper collar 22. The pressure reducing valve also includes a spring 4, one end of which extends into the valve cover 12 and abuts against the top of the valve cover 12, and the other end of which abuts against the top surface of the first sealing disc 31.

[0037] The connecting rod 33 passes through the water passage hole 240. The valve disc 34 is located in the pressure zone 102 after the valve and is arranged opposite to the water passage hole 240. The end face of the valve disc 34 facing the water passage hole 240 is provided with a sealing gasket 341. The gap between the valve disc 34 and the water passage hole 240 forms the water passage zone 100.

[0038] During operation, the pressure after the valve acts on the first sealing disc 31, and the pressure before the valve acts on the second sealing disc 32. Combined with the elastic force of the spring 4, the valve core 3 can automatically move axially with the pressure change in the water circuit, and the opening of the valve disc 34 and the outlet pressure of the pressure reducing valve can be autonomously adjusted.

[0039] In this embodiment, as a preferred structure, the axial height of the first pressure-conducting port 201 is greater than the axial height of the water-passing zone 100 in the direction along the axial direction of the valve core frame 2 and towards the downstream pressure zone 102. This structural design significantly reduces the fluctuation of the downstream pressure caused by the impact water flow in the water-passing zone 100, drastically reducing the valve core 3 vibration phenomenon (specifically, both the vibration frequency and amplitude of the valve core are significantly reduced), thereby significantly lowering the noise.

[0040] Example 2 Simultaneously refer to Figure 7 This second embodiment is basically the same in structure as the first embodiment described above. The main difference is that in this embodiment, the axial height of the first pressure-conducting port 201 is greater than the axial height of the second port 242, but less than the axial height of the water passage 100 (maximum valve disc opening). As a suboptimal solution, although the direct water flow impact on the water passage 100 is reduced, some water still directly impacts the pressure-conducting channel 200 from the first pressure-conducting port 201. Therefore, compared with the first embodiment, the noise reduction effect is not as good.

[0041] Example 3 Reference Figure 8 This third embodiment is basically the same in structure as the first embodiment described above. The main difference is that in this embodiment, the second port is provided with an extension ring 243 extending toward the downstream pressure zone 102. One end of the extension ring 243 that extends into the downstream pressure zone 102 forms a free end, and the end face of the free end is a conical surface. The conical surface allows a line seal to be formed between the valve disc 34 and the extension ring 243, thereby improving the reliability of the seal.

[0042] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A pressure reducing valve characterized in that it include: Valve body assembly (1), wherein a valve cavity (10) is provided inside the valve body assembly (1); A valve core frame (2) is fixedly installed in the valve cavity (10). The valve core frame (2) has a water passage hole (240). One side of the water passage hole (240) forms a pressure zone (101) before the valve and the other side of the water passage hole (240) forms a pressure zone (102) after the valve. The port of the water passage hole (240) facing the pressure zone (101) before the valve forms a first port (241) and the port of the water passage hole facing the pressure zone (102) after the valve forms a second port (242). The valve core frame (2) is also provided with a pressure guiding channel (200), which has a first pressure guiding port (201) extending into the pressure zone (102) after the valve; along the axial direction of the valve core frame (2) and toward the pressure zone (102) after the valve, the axial height of the first pressure guiding port (201) is greater than the axial height of the second port (242).

2. The pressure reducing valve according to claim 1, characterized by: The pressure reducing valve also includes a valve core (3), which passes through the water passage hole (240) and is axially movable in the valve core frame (2). The valve core (3) includes a valve disc (34) for adjusting the opening degree. The valve disc (34) is located in the pressure zone (102) after the valve and is arranged opposite to the water passage hole (240). The gap between the valve disc (34) and the water passage hole (240) forms a water passage area (100). Along the axial direction of the valve core frame (2) and towards the pressure zone (102) after the valve, the axial height of the first pressure guiding port (201) is greater than the axial height of the water passage area (100).

3. The pressure reducing valve according to claim 2, characterized by: The valve disc (34) has a sealing gasket (341) on the end face facing the water passage (240).

4. The pressure reducing valve according to claim 2, characterized by: The valve core frame (2) includes an upper collar (22), a lower collar (24), and at least two connecting rods (23). One end of each connecting rod (23) is fixed to the bottom surface of the upper collar (22), and the other end is fixed to the top surface of the lower collar (24). The connecting rods (23) are spaced apart from each other. The water passage hole (240) is opened in the middle of the lower collar (24). The valve core frame (2) also includes at least two extension rods (25) and at least two pressure guiding channels (200). The extension rod (25) protrudes from the bottom surface of the lower collar (24), one end of which is fixed to the bottom surface of the lower collar (24), and the other end forms the first pressure guiding port (201). Each pressure guiding channel (200) passes through the extension rod (25), the lower collar (24), the connecting rod (23), and the upper collar (22) sequentially from the corresponding first pressure guiding port (201). The top surface of the upper collar (22) is provided with the second pressure guiding port (202) of the pressure guiding channel (200).

5. The pressure reducing valve according to claim 4, characterized by: The extension rod (25) and the connecting rod (23) are coaxial and correspond one-to-one.

6. The pressure reducing valve according to claim 4, characterized by: The valve core frame (2) also includes a pressure guide sleeve (21), which is fixed to the upper end of the upper collar (22). The internal space of the pressure guide sleeve (21) forms a pressure guide cavity (210), and the second pressure guide port (202) is connected to the pressure guide cavity (210).

7. The pressure reducing valve according to claim 6, characterized by: The outer wall of the pressure guide sleeve (21) is fixed with a convex ring (26); the valve body assembly (1) includes a valve body (11) and a valve cover (12), and the convex ring (26) is fastened between the valve body (11) and the valve cover (12).

8. The pressure reducing valve according to claim 7, characterized by: The pressure guide sleeve (21), convex ring (26), upper collar (22), connecting rod (23), lower collar (24) and extension rod (25) are integrally formed.

9. The pressure reducing valve according to claim 6, characterized by: The valve core (3) also includes a first sealing disc (31), a second sealing disc (32), and a connecting rod (33). The first sealing disc (31), the second sealing disc (32), the connecting rod (33), and the valve disc (34) are fixedly connected in sequence. The first sealing disc (31) is sealed and installed in the pressure guiding sleeve (21), and the second pressure guiding port (202) faces the first sealing disc (31). The second sealing disc (32) is sealed and installed in the upper collar (22), and the connecting rod (33) passes through the water passage hole (240).

10. The pressure reducing valve according to claim 1, characterized by: The second port (242) is provided with an extension ring (243) extending toward the pressure zone (102) after the valve. One end of the extension ring (243) extending into the pressure zone (102) after the valve forms a free end, and the end face of the free end is a conical surface.

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