Pressure reducing valve

Abstract

This utility model discloses a pressure reducing valve, which includes a valve body, a valve core frame, and a valve core. The valve body has a valve cavity, and the valve core frame is fixedly installed within the valve cavity. The valve core frame includes a pressure guiding sleeve, a separator ring, and at least two spaced-apart pressure guiding rods. The two ends of each pressure guiding rod are fixed to the pressure guiding sleeve and the separator ring, respectively. The valve core is axially movable and installed within the valve core frame. The valve core includes a pressure guiding part, a sealing part, and a connecting rod. The two ends of the connecting rod are fixed to the pressure guiding part and the sealing part, respectively. The pressure guiding part is installed within the pressure guiding sleeve, and the connecting rod passes through the separator ring. The pressure reducing valve also includes a guide member for guiding the connecting rod, which is fixedly installed within the valve core frame. This utility model, through the provision of the guide member, not only ensures the axial movement of the valve core but also restricts the connecting rod radially, effectively preventing valve core wobbling and thus reducing noise during valve core movement.

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 piston-type pressure reducing valve 1′ is controlled by the downstream pressure. The upstream pressure zone 11′ and the downstream pressure zone 12′ are roughly divided by the dashed line A; the upstream pressure zone 11′ is closer to the inlet, and the downstream pressure zone 12′ is closer to the outlet. When the downstream pressure increases, the valve core 2′ rises, decreasing the valve opening; when the downstream pressure decreases, the valve core 2′ descends, increasing the valve opening. In actual operation, the valve core 2′ automatically adjusts the valve opening by axial movement within the valve core holder 3′ in response to changes in downstream pressure, thus meeting the control requirements.

[0003] Because the valve core 2′ is quite long, it often wobbles (radially) during axial movement, causing the pressure reducing valve to generate significant noise during operation.

[0004] In addition, in the prior art, the lower port 31' of the pressure guiding channel 30' is opened on the bottom surface of the valve core frame 3'. It is directly impacted by the water flow at the water passage 32', causing the pressure after the valve to fluctuate after being impacted by the water flow, resulting in the valve core 2' shaking (axial), which further increases the noise.

[0005] Taking a pressure reducing valve with a nominal diameter of 20mm as an example, its noise level is usually around 70 decibels, which can be clearly heard by the human ear even during the day. Utility Model Content

[0006] This utility model provides a pressure reducing valve, the purpose of which is to overcome the problem of excessive noise caused by valve core shaking in the prior art.

[0007] To achieve this objective, the present invention adopts the following technical solution: A pressure reducing valve, comprising: The valve body has a valve cavity inside; A valve core frame is fixedly installed inside the valve cavity. The valve core frame includes a pressure guide sleeve, a partition ring, and at least two pressure guide rods spaced apart from each other. The two ends of the pressure guide rods are respectively fixed to the pressure guide sleeve and the partition ring. A valve core is axially movable and installed in a valve core frame. The valve core includes a pressure guiding part, a sealing part, and a connecting rod. The two ends of the connecting rod are respectively fixed to the pressure guiding part and the sealing part. The pressure guiding part is installed in a pressure guiding sleeve, and the connecting rod passes through a partition ring. The pressure reducing valve also includes a guide member for guiding the connecting rod, the guide member being fixedly installed inside the valve core frame.

[0008] In the recommended embodiment, the guide member includes a support portion and a guide portion for guiding the connecting rod. The support portion is fixed to the valve core frame, and the guide portion is fixed to the support portion and sleeved on the connecting rod. The guide member is fixed to the valve core frame, and as part of the valve core frame, it has a reasonable structural layout and is easy to manufacture.

[0009] In the recommended embodiment, the guide is located at the bottom of the pressure-conducting sleeve. The guide is mounted flush against the pressure-conducting sleeve, avoiding the main flow channel and reducing flow resistance. Furthermore, the guide is located approximately in the middle of the valve core holder, providing good radial restraint on the connecting rod (valve core) and reducing valve core wobble.

[0010] In the recommended embodiment, the support is a partition, and the partition has at least one pressure guiding hole. The purpose of providing the pressure guiding hole is to connect the spaces on both sides of the partition, ensuring that the pressure guiding part can receive fluid pressure changes in real time.

[0011] In the recommended embodiment, the pressure guiding holes are evenly distributed around the guide portion. The even distribution of the pressure guiding holes ensures that the pressure guiding portion receives uniform force.

[0012] In the recommended embodiment, the guide portion protrudes from the partition along the axial direction of the guide member. By appropriately extending the axial length of the guide member, the wobble problem during valve core movement can be further reduced.

[0013] In the recommended embodiment, a water passage hole is formed on the inner edge of the separator ring, a pressure zone before the valve is formed on one side of the water passage hole, and a pressure zone after the valve is formed on the other side of the water passage hole; and the port of the water passage hole facing the pressure zone before the valve is formed as a first port, and the port of the water passage hole facing the pressure zone after the valve is formed as a second port. The valve core frame is also provided with a pressure guiding channel. One end of the pressure guiding channel is connected to the pressure guiding sleeve, and the other end of the pressure guiding channel extends into the pressure zone after the valve and forms a first pressure guiding port. 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.

[0014] The first pressure-conducting port and the second port form a height difference along the axial direction of the valve core frame, which can reduce the impact of water flow impact at the water passage on the pressure-conducting channel, thereby reducing the fluctuation of the impact water flow on the downstream pressure of the valve, thus reducing valve core vibration and noise.

[0015] In the recommended embodiment, the sealing part is located in the downstream pressure zone and is positioned opposite to the water passage hole; the gap between the sealing part and the water passage hole forms a water passage zone, which is axially aligned with the valve core frame and directed towards the downstream pressure zone. The axial height of the first pressure-conducting port is greater than the axial height of the water passage zone. This greater axial height of the first pressure-conducting port further reduces the impact of the water flow in the water passage zone on the downstream pressure fluctuations, significantly reducing valve core vibration (specifically, both the vibration frequency and amplitude are significantly reduced), thereby significantly lowering noise.

[0016] In the recommended embodiment, the valve core holder further includes an extension rod, which corresponds one-to-one with the pressure guide rod and extends into the pressure zone after the valve. One end of the extension rod is fixed to the side of the separator ring facing the pressure zone after the valve, and the other end of the extension rod forms a first pressure guide port. The pressure guide sleeve includes a large inner hole section and a small inner hole section, with a step formed between the large and small inner hole sections. The pressure guide channel simultaneously passes through the small inner hole section, the pressure guide rod, the separator ring, and the extension rod. Using an extension rod results in a more reasonable layout and facilitates processing.

[0017] In the recommended embodiment, the pressure guiding sleeve, pressure guiding rod, separator ring, extension rod, and guide component are integrally formed. The integrally formed valve core frame not only facilitates processing but also ensures high structural reliability.

[0018] The beneficial effects of this utility model are: By setting up a guide, this utility model can not only ensure that the valve core can move axially, but also restrict the connecting rod radially and effectively prevent the valve core from shaking, thereby reducing the noise when the valve core moves. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the existing technology.

[0020] Figure 2 This is a schematic diagram of the pressure reducing valve in Example 1.

[0021] Figure 3 This is a schematic diagram of the valve body.

[0022] Figure 4 This is a three-dimensional structural diagram of the valve core holder.

[0023] Figure 5 This is a schematic diagram of the cross-sectional structure of the valve core frame.

[0024] Figure 6 This is a schematic diagram of the valve core.

[0025] Figure 7 This is a schematic diagram of the structure of Example 2.

[0026] Figure 8 This is a schematic diagram of the structure of Example 3.

[0027] Figure 9 This is a schematic diagram of the structure of Example 4.

[0028] Explanation of reference numerals in the attached drawings: Valve body 1, Valve body 11, Valve cover 12, Valve cavity 10, Inlet 111, Outlet 112, Pressure zone before valve 101, Pressure zone after valve 102, Valve core frame 2, Pressure guide sleeve 21, Convex ring 210, Large inner hole section 211, Small inner hole section 212, Step 213, Pressure guide rod 22, Separator ring 23, Water passage hole 230, Sealing ring 231, First port 2301, Second port 2302, Guide component 24, Partition plate 241, Guide part 242, Pressure guide hole 243, Pressure guide channel 20, First pressure guide port 201, Second pressure guide port 202, Extension rod 25, Valve core 3, Pressure guide part 31, Small diameter pressure guide plate 311, Large diameter pressure guide plate 312, Sealing part 32, Connecting rod 33, Spring 4. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] Example 1 Reference Figure 2 and Figure 3 A pressure reducing valve includes a valve body 1, a valve core frame 2, a valve core 3, and a spring 4. The valve body 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.

[0034] Reference Figure 4 and Figure 5 The valve core frame 2 includes, from top to bottom, a pressure guiding sleeve 21, four evenly spaced pressure guiding rods 22, and a separating ring 23. The upper end of each pressure guiding rod 22 is fixed to the pressure guiding sleeve 21, and the lower end of each pressure guiding rod 22 is fixed to the separating ring 23. The gap between adjacent pressure guiding rods 22 forms a water flow channel (not shown in the figure).

[0035] The outer wall of the pressure guiding sleeve 21 is provided with a protruding ring 210. When the valve cover body 12 is fixed to the valve body 11, the protruding ring 210 can be pressed tightly so that the valve core frame 2 is fixed in the valve cavity 10. The inner side of the pressure guiding sleeve 21 includes an upper large inner hole section 211 and a lower small inner hole section 212, and a step 213 is formed between the large inner hole section 211 and the small inner hole section 212.

[0036] The inner edge of the separator ring 23 forms a water passage hole 230, and a sealing ring 231 is fitted on the outer surface of the separator ring 23 and seals against the inner wall of the valve cavity 10. The water passage hole 230 serves as the boundary (approximately...). Figure 2 (A) The valve chamber 10 is divided into a pre-valve pressure zone 101 and a post-valve pressure zone 102, wherein the pre-valve pressure zone 101 is close to the inlet 111 and the post-valve pressure zone 102 is close to the outlet 112.

[0037] The valve core frame 2 in this embodiment also includes a guide member 24, several pressure guiding channels 20, and several extension rods 25. In this embodiment, the guide member 24 is integrally formed and fixed inside the valve core frame 2. To reduce interference with water flow, the guide member 24 is located at the bottom of the pressure guiding sleeve 21. The guide member 24 in this embodiment includes a partition 241 and a guide portion 242. The outer end of the partition 241 is fixed to the valve core frame 2, and the guide portion 242 is disposed at the inner end of the partition 241. At the same time, in order to improve the guiding and limiting function, the guide portion 242 protrudes axially from the partition 241. After installation, the valve core 3 passes through the guide portion 242. In addition, in order to connect the pressure guiding sleeve 21 and the valve cavity 10, pressure guiding holes 243 are provided on the partition 241. The pressure guiding holes 243 surround the pressure guiding member 24 and are evenly spaced. It is worth mentioning that the support part in this embodiment adopts the form of a partition. The support part can also be rod-shaped or other forms. Its main purpose is to firmly fix the guide part.

[0038] The aforementioned extension rods 25 correspond one-to-one with the pressure guiding rods 22. One end of each extension rod 25 is fixed to the side of the separator ring 23 facing the pressure zone 102 after the valve, and the other end of each extension rod 25 forms a free end. The pressure guiding channel 20 sequentially passes through the small inner hole section 212, the pressure guiding rod 22, the separator ring 23, and the extension rods 25. The free end of each extension rod 25 forms the first pressure guiding port 201 of the pressure guiding channel 20, which communicates with the pressure zone 102 after the valve. The other end of the pressure guiding channel 20 extends to the step 213, and a second pressure guiding port 202 of the pressure guiding channel 20 is formed on the step 213. The second pressure guiding port 202 communicates with the large inner hole section 211.

[0039] Reference Figure 6 The valve core 3 includes a pressure guiding part 31, a sealing part 32, and a connecting rod 33. The two ends of the connecting rod 33 are fixed to the pressure guiding part 31 and the sealing part 32, respectively. The guide part 242 is sleeved on the connecting rod 33, and the connecting rod 33 passes through the water passage hole 230 of the partition ring 23, so that the pressure guiding part 31 and the sealing part 32 of the valve core 3 are located on both sides of the water passage hole 230.

[0040] The pressure guiding part 31 includes a small-diameter pressure guiding plate 311 and a large-diameter pressure guiding plate 312 fixed to each other. The small-diameter pressure guiding plate 311 is sealed and installed in the small inner hole section 212, and the pressure before the valve can be applied to the small-diameter pressure guiding plate 311 through the pressure guiding hole 243. The large-diameter pressure guiding plate 312 is sealed and installed in the large inner hole section 211, and the pressure after the valve can be applied to the large-diameter pressure guiding plate 312 through the pressure guiding channel 20.

[0041] The sealing part 32 is located within the downstream pressure zone 102. As shown in the figure, the sealing part 32 is positioned opposite to the water passage hole 230, and the gap between the sealing part 32 and the water passage hole 230 forms the water passage zone 300. The port of the water passage hole 230 facing the upstream pressure zone 101 forms the first port 2301, and the port of the water passage hole 230 facing the downstream pressure zone 102 forms the second port 2302. Along the axial direction of the valve core frame 2 and towards the downstream pressure zone 102, the axial height of the first pressure-conducting port 201 of the extension rod 25 is not only greater than the axial height of the second port 2302, but also greater than the axial height of the water passage zone 300, thereby reducing the impact of water flow impact in the water passage zone 300 on the downstream pressure fluctuations.

[0042] Continue to refer to Figure 2 One end of the spring 4 abuts against the valve cover body 12, and the other end abuts against the large-diameter guide pressure plate 312 of the valve core 3.

[0043] The valve core frame 2 is usually made of plastic. The pressure guide sleeve 21, convex ring 210, guide member 24, pressure guide rod 22, partition ring 23 and extension rod 25 are integrally formed, which not only facilitates processing, but also ensures that the valve core frame 2 has sufficient reliability and can withstand large water pressure.

[0044] When the pressure reducing valve is in the open state, the water flows into the valve chamber 10 from the inlet, and passes through the gap (water flow channel) between the pressure guide rods 22 and the water passage 300 in sequence, and finally flows out from the outlet.

[0045] During operation, the pressure after the valve acts on the large-diameter guide plate 312, and the pressure before the valve acts on the small-diameter guide plate 311. 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, so that the opening degree of the pressure reducing valve (axial height of the water passage 300) and the outlet pressure of the pressure reducing valve can be autonomously adjusted.

[0046] This embodiment, as a preferred structure, reduces the noise impact during the axial movement of the valve core 3 through the following two structural adjustments.

[0047] First, a guide 24 is added to guide the connecting rod 33 of the valve core 3 and at the same time limit the swing (shaking) of the connecting rod 33 to achieve the purpose of noise reduction.

[0048] Secondly, the pressure guiding channel 20 is extended, and the axial height of the first pressure guiding port 201 is made greater than the axial height of the water passage 300 by extending the rod 25. Through this structural design, the fluctuation of the downstream pressure caused by the impact water flow in the water passage 300 is significantly reduced, and the vibration of the valve core 3 is sharply reduced (specifically, the vibration frequency and vibration amplitude of the valve core 3 are significantly reduced), thereby further reducing noise.

[0049] The noise level was measured to be around 40 decibels, which is barely audible to the human ear during the day, and although it can be heard at night, the noise is not noticeable.

[0050] Example 2 Reference Figure 7 This second embodiment is basically the same in structure as the first embodiment, the main difference being that the extension rod is removed, making the axial height of the first pressure-conducting port 201 equal to the axial height of the second port 2302. The noise level was measured to be approximately 58 decibels. Although reduced, the noise is still noticeable at night.

[0051] Example 3 Reference Figure 8 This third embodiment is basically the same in structure as the first embodiment, the main difference being that the guide component is omitted in this embodiment, but the axial height of the first pressure port 201 remains consistent with that of the first embodiment. The noise level was measured to be approximately 50 decibels, which is a reduction, but the noise is still quite noticeable at night.

[0052] Example 4 Reference Figure 9 This fourth 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 2302, but less than the axial height of the water-passing area 300 (maximum opening of the sealing part). The noise level was measured to be approximately 55 decibels. Although there has been a reduction, the noise is still quite noticeable at night.

[0053] In summary, through the comparison of the above embodiments, it can be seen that although Embodiments 2, 3, and 4 can reduce noise, their noise levels are still above 50 decibels, which does not meet the requirements of actual installation. The preferred embodiment (Embodiment 1) can reduce the noise to about 40 decibels. It can be seen that the combination of the guide structure and the extension rod structure (the axial height of the first pressure-conducting port is greater than that of the water passage area) can significantly reduce noise, achieving a 1+1>2 effect and meeting the noise requirements at night.

[0054] 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 (1), wherein a valve cavity (10) is provided inside the valve body (1); Valve core frame (2), the valve core frame (2) is fixedly installed in the valve cavity (10), the valve core frame (2) includes a pressure guide sleeve (21), a partition ring (23) and at least two pressure guide rods (22) spaced apart from each other, the two ends of the pressure guide rods (22) are respectively fixed to the pressure guide sleeve (21) and the partition ring (23). The valve core (3) is axially movable and installed in the valve core frame (2). The valve core (3) includes a pressure guiding part (31), a sealing part (32) and a connecting rod (33). The two ends of the connecting rod (33) are respectively fixed to the pressure guiding part (31) and the sealing part (32). The pressure guiding part (31) is installed in the pressure guiding sleeve (21). The connecting rod (33) passes through the partition ring (23). The pressure reducing valve also includes a guide (24) for guiding the connecting rod (33), the guide (24) being fixedly installed inside the valve core frame (2).

2. The pressure reducing valve according to claim 1, characterized by: The guide (24) includes a support portion and a guide portion (242) for guiding the connecting rod (33). The support portion is fixed to the valve core frame (2), and the guide portion (242) is fixed to the support portion and sleeved on the connecting rod (33).

3. The pressure reducing valve according to claim 2, characterized by: The guide (24) is located at the bottom of the pressure sleeve (21).

4. The pressure reducing valve according to claim 3, characterized by: The support is a partition (241), and the partition (241) is provided with at least one pressure guiding hole (243).

5. The pressure reducing valve according to claim 4, characterized by: The pressure guiding holes (243) are evenly distributed around the guide portion (242).

6. The pressure reducing valve according to claim 4, characterized in that: Along the axial direction of the guide (24), the guide portion (242) protrudes from the partition (241).

7. The pressure reducing valve according to any one of claims 1 to 6, characterized by: The inner edge of the partition ring (23) forms a water passage hole (230), one side of the water passage hole (230) forms a valve front pressure zone (101), and the other side of the water passage hole (230) forms a valve rear pressure zone (102); and the port of the water passage hole (230) facing the valve front pressure zone (101) forms a first port (2301), and the port of the water passage hole (230) facing the valve rear pressure zone (102) forms a second port (2302). The valve core frame (2) is also provided with a pressure guiding channel (20). One end of the pressure guiding channel (20) is connected to the pressure guiding sleeve (21), and the other end of the pressure guiding channel (20) extends into the pressure zone (102) after the valve and forms a first pressure guiding port (201). 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 second port (2302).

8. The pressure reducing valve according to claim 7, characterized by: The sealing part (32) is located in the pressure zone (102) after the valve and is disposed opposite to the water passage hole (230); the gap between the sealing part (32) and the water passage hole (230) forms a water passage area (300), which is along the axial direction of the valve core frame (2) and toward the pressure zone (102) after the valve, and the axial height of the first pressure guiding port (201) is greater than the axial height of the water passage area (300).

9. The pressure reducing valve according to claim 8, characterized by: The valve core frame (2) also includes an extension rod (25), which corresponds one-to-one with the pressure guide rod (22) and extends into the pressure zone (102) after the valve. One end of the extension rod (25) is fixed to the side of the separator ring (23) facing the pressure zone (102) after the valve, and the other end of the extension rod (25) forms a first pressure guide port (201). The pressure guide sleeve (21) includes a large inner hole section (211) and a small inner hole section (212), and a step (213) is formed between the large inner hole section (211) and the small inner hole section (212). The pressure guide channel (20) simultaneously passes through the small inner hole section (212), the pressure guide rod (22), the separator ring (23), and the extension rod (25).

10. The pressure reducing valve according to claim 9, characterized by: The pressure guide sleeve (21), pressure guide rod (22), separator ring (23), extension rod (25) and guide member (24) are integrally formed.

Images