Multi-stage noise reduction flow limiter

Abstract

The utility model provides a multistage noise reduction flow limiter, and aims to provide a flow limiting device which can effectively reduce water flow noise and adapt to different water pressure conditions, the multistage noise reduction flow limiter comprises at least two stages of flow limiters, and a flow limiting hole of the upper stage of flow limiter is larger than or equal to a flow limiting hole of the lower stage of flow limiter. The spacing distance between the upper-stage flow limiter and the lower-stage flow limiter needs to be more than one time of the equivalent aperture of the flow limiting hole, the springs are used for automatically adjusting the working states of the flow limiters under different water pressures and sealing the water outlet under water flow stamping, and according to different placement positions of the springs, when the springs do not work, the flow limiting plates in front of the springs do not work, and the springs are not used for sealing the water outlet. The flow limiting plate behind the spring plays a role, the flow limiting plate in front of the spring starts to work when the spring is compressed, flexible adjustment can be achieved under different water pressures, and the flow limiting device can be applied to various occasions needing water flow control and noise reduction, such as the fields of families, industry, agriculture and the like.

Description

Technical Field

[0001] This utility model relates to the field of fluid control technology, and in particular to a multi-stage noise reduction current limiter. Background Technology

[0002] In the field of fluid control, flow control and noise reduction for fluids such as water have always been important research directions; in existing technologies, such as Figure 1 As shown, the flow limiting function is usually achieved by a combination of rubber parts and flow limiting plates. The specific principle is that the rubber parts have different deformation amounts under different water pressures. By forming different sized passages with the flow limiting plate through different deformation amounts, the flow accuracy under different water pressures can be controlled. This flow limiter has a good flow limiting effect, but it is noisy at medium and high water pressures.

[0003] The utility model with authorization announcement number CN218063522U provides a "one-way flow restrictor", including a shell and a bottom cover. The shell and the bottom cover are fixedly fitted together. The bottom cover is provided with an O-ring and several water outlets. The water passage cavity is connected to the water outlets. The O-ring can change the cross-sectional area of ​​the water outlet. When the inlet water pressure is lower than a specified pressure value, the O-ring does not deform, so the cross-sectional area of ​​the water outlet remains unchanged, and the water flow rate also remains unchanged. When the inlet water pressure is higher than the specified pressure value, the O-ring deforms, so the cross-sectional area of ​​the water outlet decreases, and the water flow rate also decreases. This utility model has a simple and compact structure, which can avoid the loss and waste of a large water flow under high water pressure, thereby saving water resources. However, although this utility model has a good flow restriction effect, it is difficult to reduce noise at medium and high water pressure.

[0004] To achieve precise flow control and noise reduction, utility model patent CN204852592U discloses a "flow restrictor with noise reduction function and an inlet valve based on the flow restrictor". The inlet valve contains a flow restrictor with noise reduction function, comprising a flow restrictor body. The flow restrictor structure uses a positioning plate for positioning and installation, and internally employs a separate and slender throttling orifice structure to allow water flow. While throttling the flow, it also reduces collisions between water flows or between water flows and other media, thereby reducing noise generation. However, this utility model is prone to clogging of the flow restrictor orifice and narrow channels, lacks flexible adjustment, has limited noise reduction effect, cannot precisely control the flow, and the noise reduction effect is not significant, failing to meet certain high noise reduction standards.

[0005] In summary, existing noise reduction current limiters typically have the following drawbacks:

[0006] 1) Poor rate limiting effect: The rate limiting effect is limited and cannot accurately control traffic;

[0007] 2) Excessive noise: Turbulence and cavitation phenomena generated when water flows through the flow-limiting orifice and multi-stage flow limiters in existing flow restrictors can lead to unstable water flow and noise generation.

[0008] 3) Poor adaptability: Due to the simple flow-limiting structure, it cannot be flexibly adjusted under different water pressures, resulting in poor adaptability. Summary of the Invention

[0009] The purpose of this invention is to solve the problems in the prior art by proposing a multi-stage noise reduction current limiter, which can solve the problems of poor current limiting effect, high noise and poor adaptability in the prior art, and achieve flow limiting and effective noise reduction for fluids such as water.

[0010] To achieve the above objectives, this utility model proposes a multi-stage noise-reducing flow limiter, comprising at least two stages of flow limiter bodies. Each stage of the flow limiter body has several flow-limiting holes, and the upper stage flow limiter body is installed in conjunction with the lower stage flow limiter body. The noise-reducing flow limiter includes a first stage flow limiter body, a second stage flow limiter body, and a spring. The first stage flow limiter body has several first flow-limiting holes, and the second stage flow limiter body has several second flow-limiting holes. The spring is movably disposed between the first stage flow limiter body and the second stage flow limiter body along the water flow direction, and the spring seals the outlet under the pressure of the water flow. When the second stage flow limiter body and the spring are not in operation, the first stage flow limiter body works independently; when the spring is compressed, the second stage flow limiter body begins to work.

[0011] Preferably, the flow restrictor body includes a shell, a flow restricting plate, a water inlet, a water outlet, and flow restricting holes. The shell is a cylindrical shape with an internal cavity structure. The flow restricting plate is inside the shell. The water inlet is located at one end of the shell, the water outlet is located at the other end of the shell, and the flow restricting holes are distributed on the flow restricting plate.

[0012] Preferably, the flow restrictor and the outer shell are integrally formed.

[0013] Preferably, the flow-limiting plate and the outer shell are detachable.

[0014] Preferably, the flow restrictor includes a first-stage flow restrictor body, a second-stage flow restrictor body, a third-stage flow restrictor body, and a spring. The first-stage flow restrictor body has a plurality of first flow restricting holes, the second-stage flow restrictor body has a plurality of second flow restricting holes, and the third-stage flow restrictor body has a plurality of third flow restricting holes. The spring can be moved along the water flow direction and can be located between any two of the first-stage flow restrictor body, the second-stage flow restrictor body, and the third-stage flow restrictor body. The spring seals the outlet under the pressure of the water flow.

[0015] Preferably, the flow restrictor includes a first-stage flow restrictor body, a second-stage flow restrictor body, a third-stage flow restrictor body, a fourth-stage flow restrictor body, and a spring. The first-stage flow restrictor body 1 is provided with a plurality of first flow restricting holes, the second-stage flow restrictor body is provided with a plurality of second flow restricting holes, the third-stage flow restrictor body is provided with a plurality of third flow restricting holes, and the fourth-stage flow restrictor body is provided with a plurality of fourth flow restricting holes. The spring can be moved along the water flow direction and can be located between any two of the first-stage flow restrictor body, the second-stage flow restrictor body, the third-stage flow restrictor body, and the fourth-stage flow restrictor body. The spring seals the outlet under the pressure of the water flow.

[0016] Preferably, the flow limiting orifice of the upper-level flow limiter is greater than or equal to the flow limiting orifice of the lower-level flow limiter, and the interval between the upper and lower-level flow limiters needs to be more than 1 times the equivalent orifice diameter of the flow limiting orifice.

[0017] Preferably, there can be multiple springs respectively disposed between the two stages, and the positions of the springs can be adjusted. When the springs are not in use, the flow limiting plate in front of the springs is not in use, while the flow limiting plate behind the springs is in use. When the springs are compressed, the flow limiting plate in front of the springs starts to work.

[0018] The beneficial effects of this utility model are:

[0019] 1) Significant noise reduction effect: The noise generated by the flow limiter can be reduced by the flow limiting orifice and the addition of multiple stages. The flow accuracy can also be improved by the automatic adjustment of the spring and the number of stages, which effectively reduces the water flow velocity and reduces the noise generated by the water flow impact.

[0020] 2) Precise flow control: The flow is controlled by the number of flow limiter stages. When there are multiple stages, the flow control accuracy of the flow limiter is improved, which can meet the water flow regulation needs under different water pressure conditions.

[0021] 3) Easy installation and maintenance: Each level of the flow limiter can be disassembled and maintained independently, and can be widely used in various fluid control systems that require flow limiting and noise reduction, such as water supply systems and hydraulic systems.

[0022] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a current limiter in existing technology;

[0024] Figure 2 This is a schematic diagram of the internal structure of the current limiter of this utility model;

[0025] Figure 3 This is a schematic diagram of the external structure of the current limiter of this utility model;

[0026] Figure 4 This is a cross-sectional schematic diagram of the two-stage current limiter in a multi-stage noise reduction current limiter of this utility model;

[0027] Figure 5 This is a cross-sectional schematic diagram of the three-stage current limiter in a multi-stage noise reduction current limiter of this utility model;

[0028] Figure 6 This is a cross-sectional schematic diagram of the fourth-stage current limiter spring in a multi-stage noise reduction current limiter of this utility model when it is not compressed;

[0029] Figure 7 This is a cross-sectional schematic diagram of the spring of the fourth-stage current limiter in a multi-stage noise reduction current limiter of this utility model when it is compressed.

[0030] The following numbers are labeled in the diagram: 1-First-stage flow limiter; 2-Second-stage flow limiter; 3-Third-stage flow limiter; 4-Fourth-stage flow limiter; 5-Spring; 11-First flow limiting orifice; 21-Second flow limiting orifice; 31-Third flow limiting orifice; 41-Fourth flow limiting orifice; 101-Outer shell; 102-Flow limiting plate; 103-Inlet; 104-Outlet; 105-Flow limiting orifice. Detailed Implementation

[0031] Example 1:

[0032] In the description of this utility model, it should be noted that the flow limiting orifice 105 includes a first flow limiting orifice 11, a second flow limiting orifice 21, a third flow limiting orifice 31 and a fourth flow limiting orifice 41, only for the convenience of describing this utility model and simplifying the description.

[0033] See Figures 2 to 4 A multi-stage noise reduction current limiter is a two-stage noise reduction current limiter, comprising a first-stage current limiter body 1, a second-stage current limiter body 2, and a spring 5, such as... Figure 2 and Figure 3 As shown, the first-stage flow restrictor body 1 is provided with a plurality of first flow restricting holes 11, and the second-stage flow restrictor body 2 is provided with a plurality of second flow restricting holes 21; the spring 5 is movably disposed between the first-stage flow restrictor body 1 and the second-stage flow restrictor body 2 along the water flow direction, and the spring 5 seals the outlet 104 under the pressure of the water flow; as Figure 4 As shown, when the second-stage current limiter body 2 and the spring 5 are not in operation, the first-stage current limiter body 1 works independently; when the spring 5 is compressed, the second-stage current limiter body 2 begins to work.

[0034] The noise reduction flow limiter in this embodiment includes a first-stage flow limiter body 1 and a second-stage flow limiter body 2. The water flow first enters the first-stage flow limiter body 1 and is initially limited through multiple first flow limiting holes 11 inside it, reducing the water flow velocity and pressure. Then the water flow enters the second-stage flow limiter body 2 and is further limited through second flow limiting holes 21. The size and number of flow limiting holes of the first-stage flow limiter body 1 and the second-stage flow limiter body 2 are designed according to common working water pressure and flow requirements. This two-stage flow limiter has a simple structure, low cost, and is suitable for general fluid control systems.

[0035] Example 2:

[0036] See Figure 5 This embodiment is basically the same as Embodiment 1, except that the noise reduction flow limiter is a three-stage flow limiter, including a first-stage flow limiter body 1, a second-stage flow limiter body 2, a third-stage flow limiter body 3, and a spring 5. The first-stage flow limiter body 1 is provided with a plurality of first flow limiting holes 11, the second-stage flow limiter body 2 is provided with a plurality of second flow limiting holes 21, and the third-stage flow limiter body 3 is provided with a plurality of third flow limiting holes 31. The spring 5 is movably positioned between any two of the first-stage flow limiter body 1, the second-stage flow limiter body 2, and the third-stage flow limiter body 3 along the water flow direction. The spring 5 seals the outlet 104 under the pressure of the water flow. Depending on the position of the spring 5, when the spring 5 is not in use, the flow limiting plate 102 in front of the spring 5 is not in use, and the flow limiting plate 102 behind the spring 5 is in use. When the spring 5 is compressed, the flow limiting plate 102 in front of the spring 5 starts to work.

[0037] This embodiment adds a third-stage flow limiter body 3 to the embodiment 1 to form a three-stage flow limiting structure. The flow limiting orifice parameters of each stage flow limiter are optimized according to different water pressure ranges. The three-stage noise reduction flow limiter is suitable for occasions with flow limiting and noise reduction requirements, such as water supply systems of high-rise buildings.

[0038] Example 3:

[0039] See Figure 6 and Figure 7 This embodiment is basically the same as Embodiment 1, except that the noise reduction current limiter is a four-stage current limiter, including a first-stage current limiter body 1, a second-stage current limiter body 2, a third-stage current limiter body 3, a fourth-stage current limiter body 4, and a spring 5. The first-stage current limiter body 1 is provided with a plurality of first current limiting holes 11, the second-stage current limiter body 2 is provided with a plurality of second current limiting holes 21, the third-stage current limiter body 3 is provided with a plurality of third current limiting holes 31, and the fourth-stage current limiter body 4 is provided with a plurality of fourth current limiting holes 41; as shown Figure 6As shown, the spring 5 can be positioned between any two of the first-stage flow restrictor body 1, the second-stage flow restrictor body 2, the third-stage flow restrictor body 3, and the fourth-stage flow restrictor body 4, moving along the water flow direction. Under the pressure of the water flow, the spring 5 seals the outlet 104. Depending on the position of the spring 5, when the spring 5 is not in use, the flow restrictor plate 102 in front of the spring 5 is inactive, while the flow restrictor plate 102 behind the spring 5 is active. Figure 7 As shown, when the spring 5 is compressed, the flow-limiting plate 102 in front of the spring 5 starts to work.

[0040] The noise-reducing flow limiter in this embodiment adopts a four-stage flow limiter design, which further improves the flow limiting and noise reduction effects. The size of the flow limiting orifice 105 of each stage of the flow limiter gradually decreases, while the number gradually increases, so that the water flow can be more precisely regulated when passing through each stage of the flow limiter. In addition, in order to adapt to the flow control requirements under different water pressures, a spring 5 is set inside the flow limiter. When the water pressure changes, the compression or extension of the spring 5 can change the effective flow area of ​​the flow limiting orifice 105, thereby realizing the function of automatic flow regulation. When the spring 5 is not compressed, only the first three stages of flow limiting orifice 105 limit the flow, and the flow is controlled by the first three stages. When the spring 5 is compressed, the pressure causes the body 3 of the third stage flow limiter and the body 4 of the fourth stage flow limiter to fit together, and the fourth flow limiting orifice 41 of the fourth stage flow limiter body 4 limits the flow at the same time, thus enhancing the flow limiting capability. In this embodiment, this four-stage flow limiter has a complex structure but excellent performance, and is particularly suitable for special occasions with requirements for fluid control accuracy and noise, such as precision hydraulic equipment and high-end water supply systems.

[0041] Working principle:

[0042] When water flows into the noise-reducing flow restrictor, it enters the first-stage flow restrictor body 1 from the inlet 103, passes through the first flow restricting orifice 11, and the water flow velocity and pressure are initially reduced. Subsequently, the water flows into the next-stage flow restrictor in sequence. The flow restricting orifice 105 of the previous-stage flow restrictor is larger than or equal to the flow restricting orifice 105 of the next-stage flow restrictor, and the interval between the upper and lower-stage flow restrictors needs to be more than 1 times the equivalent orifice diameter of the flow restricting orifice 105. The spring 5 can be moved along the water flow direction and can be set between any two of the first-stage flow restrictor body 1, the second-stage flow restrictor body 2, the third-stage flow restrictor body 3, and the fourth-stage flow restrictor body 4. When the spring 5 is not in action, the flow restricting plate 102 in front of the spring 5 is not in action, and the flow restricting plate 102 behind the spring 5 is in action. When the water flow compresses the spring 5, the flow restricting plate 102 in front of the spring 5 starts to work, further restricting the flow and reducing noise, and finally the water flows out from the outlet 104.

[0043] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A multi-stage noise reduction current limiter, characterized in that: The noise reduction flow limiter includes at least two flow limiter bodies, each of which has several flow limiting holes. The upper flow limiter body and the lower flow limiter body are installed together. The noise reduction flow limiter includes a first flow limiter body (1), a second flow limiter body (2) and a spring (5). The first flow limiter body (1) has several first flow limiting holes (11), and the second flow limiter body (2) has several second flow limiting holes (21). The spring (5) is movably disposed between the first flow limiter body (1) and the second flow limiter body (2) along the water flow direction. The spring (5) seals the outlet (104) under the pressure of the water flow. When the second flow limiter body (2) and the spring (5) are not in operation, the first flow limiter body (1) works independently. When the spring (5) is compressed, the second flow limiter body (2) starts to work.

2. The multi-stage noise reduction current limiter as described in claim 1, characterized in that: The flow restrictor body includes a shell (101), a flow restrictor plate (102), an inlet (103), an outlet (104), and flow restricting holes (105). The shell (101) is a cylindrical shape with an internal cavity structure. The flow restrictor plate (102) is inside the shell (101). The inlet (103) is located at one end of the shell (101), and the outlet (104) is located at the other end of the shell (101). The flow restricting holes (105) are distributed on the flow restrictor plate (102).

3. The multi-stage noise reduction current limiter as described in claim 2, characterized in that: The flow limiting plate (102) and the outer shell (101) are integrally formed.

4. A multi-stage noise reduction current limiter as described in claim 2, characterized in that: The flow limiting plate (102) and the outer shell (101) are detachable structures.

5. A multi-stage noise reduction current limiter as described in claim 1, characterized in that: The flow restrictor also includes a third-stage flow restrictor body (3), which has a plurality of third flow restricting holes (31); the spring (5) can be located between any two of the first-stage flow restrictor body (1), the second-stage flow restrictor body (2) and the third-stage flow restrictor body (3) along the water flow direction.

6. The multi-stage noise reduction current limiter as described in claim 1, characterized in that: The flow restrictor also includes a third-stage flow restrictor body (3) and a fourth-stage flow restrictor body (4). The third-stage flow restrictor body (3) is provided with a plurality of third flow restricting holes (31), and the fourth-stage flow restrictor body (4) is provided with a plurality of fourth flow restricting holes (41). The spring (5) can be moved along the water flow direction and can be set between any two of the first-stage flow restrictor body (1), the second-stage flow restrictor body (2), the third-stage flow restrictor body (3), and the fourth-stage flow restrictor body (4).

7. A multi-stage noise reduction current limiter as described in any one of claims 2 to 6, characterized in that: The spring (5) can be multiple and set between the two stages respectively, and the setting position can be adjusted. When the spring (5) does not work, the flow limiting plate (102) in front of the spring (5) does not work, and the flow limiting plate (102) behind the spring (5) works. When the spring (5) is compressed, the flow limiting plate (102) in front of the spring (5) starts to work.

8. A multi-stage noise reduction current limiter as described in any one of claims 2 to 6, characterized in that: The diameter of the flow limiting orifice (105) of the upper-level flow limiter is greater than or equal to the diameter of the flow limiting orifice (105) of the lower-level flow limiter, and the interval between the upper and lower-level flow limiters is more than 1 times the equivalent diameter of the flow limiting orifice (105).

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