Multi-stage noise reduction flow limiter

Abstract

The invention provides a multi-stage noise reduction flow limiter, and aims to provide a flow limiting device capable of effectively reducing water flow noise and adapting to different water pressure conditions, the multi-stage noise reduction flow limiter comprises at least two stages of flow limiters, and a flow limiting hole of the previous stage of flow limiter is larger than or equal to a flow limiting hole of the next 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] The present invention relates to the field of fluid control technology, and in particular to a multi-stage noise reduction flow limiter. Background Art

[0002] In the field of fluid control, flow control and noise reduction of fluids such as water have always been important research directions; in existing technologies, such as Figure 1 As shown, a combination of rubber parts and flow limiting plates is usually used to achieve the flow limiting function. The specific principle is that the rubber parts have different deformation amounts under different water pressures. The different deformation amounts and the flow limiting plates form passages of different sizes to control the flow accuracy under different water pressures. The flow limiter has a good flow limiting effect, but it is noisy at medium and high water pressures.

[0003] The invention with authorization announcement number CN218063522U provides a "one-way flow limiter", including an outer shell and a bottom cover, the outer shell is fixedly matched with the bottom cover, the bottom cover is provided with an O-ring and several water outlets, the water flow chamber is connected to the water outlet, the O-ring can change the cross-sectional area of ​​the water outlet, when the water inlet pressure is lower than the specified pressure value, the O-ring does not deform, the cross-sectional area of ​​the water outlet remains unchanged, and the water outlet flow rate remains unchanged; when the water inlet pressure is higher than the specified pressure value, the O-ring deforms, the cross-sectional area of ​​the water outlet becomes smaller, and the water outlet flow rate also becomes smaller; the invention has a simple and compact structure, which can avoid the loss and waste of large water flow under high water pressure, thereby saving water resources; however, the invention has a good flow limiting effect, but it is difficult to reduce the noise effect at medium and high water pressures.

[0004] In order to achieve precise flow control and reduce noise, the invention with authorization announcement number CN204852592U discloses a "flow limiter with noise reduction function and a water inlet valve based on the flow limiter". A flow limiter with noise reduction function is installed in the water inlet valve, which has a flow limiter body. The flow limiter structure adopts a positioning plate to achieve positioning installation, and a separate and slender throttling hole structure is adopted inside to achieve water flow. While throttling, it can also reduce the collision between water flows or between water flows and other media, thereby reducing the generation of noise; however, the invention easily causes the flow limiting holes and narrow channels to be blocked, and cannot be flexibly adjusted. The noise reduction effect is limited, the flow cannot be accurately controlled, and the noise reduction effect is not obvious, which cannot meet certain high-demand noise reduction standards.

[0005] In summary, existing noise reduction current limiters generally have the following disadvantages: 1) Poor flow limiting effect: The flow limiting effect is limited and the flow cannot be accurately controlled; 2) High noise: When the water flows through the restricting holes and multi-stage restrictors, turbulence and cavitation are generated, which can lead to unstable water flow and noise. 3) Poor adaptability: Due to the single flow-limiting structure, it cannot be flexibly adjusted under different water pressures and has poor adaptability. Summary of the Invention

[0006] The purpose of the present invention is to solve the problems in the prior art and propose a multi-stage noise reduction flow limiter that can solve the problems of poor flow limiting effect, high noise and poor adaptability in the prior art, and achieve flow limiting and effective noise reduction for fluids such as water.

[0007] To achieve the above-mentioned objectives, the present invention proposes a multi-stage noise reduction flow limiter, comprising at least two stages of flow limiter bodies, each stage of flow limiter bodies being provided with a plurality of flow limiting holes, and the upper stage flow limiter body being installed in cooperation with the lower stage flow limiter body; the noise reduction flow limiter comprises a first stage flow limiter body, a second stage flow limiter body and a spring, the first stage flow limiter body being provided with a plurality of first flow limiting holes, and the second stage flow limiter body being provided with a plurality of second flow limiting holes; the spring being movably arranged between the first stage flow limiter body and the second stage flow limiter body along the direction of water flow, and the spring sealing the water outlet under the pressure of water flow; when the second stage flow limiter body and the spring are not functioning, the first stage flow limiter body works independently, and when the spring is compressed, the second stage flow limiter body starts to work.

[0008] Preferably, the flow limiter body includes an outer shell, a flow limiting plate, a water inlet, a water outlet and a flow limiting hole. The outer shell is a cylindrical shape with a hollow structure inside. The flow limiting plate is inside the outer shell. The water inlet is located at one end of the outer shell, the water outlet is located at the other end of the outer shell, and the flow limiting holes are distributed on the flow limiting plate.

[0009] Preferably, the flow limiting plate and the housing are an integrally formed structure.

[0010] Preferably, the flow limiting plate and the housing are detachable structures.

[0011] Preferably, the flow limiter includes a first-stage flow limiter body, a second-stage flow limiter body, a third-stage flow limiter body and a spring, the first-stage flow limiter body is provided with a plurality of first flow limiting holes, the second-stage flow limiter body is provided with a plurality of second flow limiting holes, and the third-stage flow limiter body is provided with a plurality of third flow limiting holes; the spring moves along the direction of water flow and can be arranged between any two of the first-stage flow limiter body, the second-stage flow limiter body and the third-stage flow limiter body, and the spring seals the water outlet under the pressure of water flow.

[0012] Preferably, the flow limiter includes a first-stage flow limiter body, a second-stage flow limiter body, a third-stage flow limiter body, a fourth-stage flow limiter body and a spring, the first-stage flow limiter body 1 is provided with a plurality of first flow limiting holes, the second-stage flow limiter body is provided with a plurality of second flow limiting holes, the third-stage flow limiter body is provided with a plurality of third flow limiting holes, and the fourth-stage flow limiter body is provided with a plurality of fourth flow limiting holes; the spring moves along the direction of water flow and can be provided between any two of the first-stage flow limiter body, the second-stage flow limiter body, the third-stage flow limiter body and the fourth-stage flow limiter body, and the spring seals the water outlet under the pressure of water flow.

[0013] Preferably, the flow limiting hole of the upper stage flow limiter is larger than or equal to the flow limiting hole of the lower stage flow limiter, and the distance between the upper and lower stages of flow limiters needs to be more than 1 times the equivalent aperture of the flow limiting hole.

[0014] Preferably, there can be multiple springs respectively arranged between the two stages, and the setting position can be adjusted. When the spring is not working, the limiting plate in front of the spring is not working, and the limiting plate behind the spring is working; when the spring is compressed, the limiting plate in front of the spring starts to work.

[0015] Beneficial effects of the present invention: 1) Significant noise reduction effect: The noise generated by the flow restrictor can be reduced by limiting the flow holes and increasing the number of stages. The flow accuracy can also be improved by automatically adjusting the spring and the number of stages, effectively reducing the water flow velocity and the noise generated by the water impact. 2) Accurate flow control: This is achieved by adjusting the number of flow restrictor stages. When there are multiple stages, the flow control accuracy of the flow restrictor is improved to meet the water flow regulation requirements under different water pressure conditions. 3) Easy installation and maintenance: Each level of flow limiter can be disassembled and maintained independently, and can be widely used in various fluid control systems that require flow limitation and noise reduction, such as water supply systems, hydraulic systems, etc.

[0016] The features and advantages of the present invention will be described in detail through embodiments with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of a current limiter in the prior art; Figure 2 Schematic diagram of the internal structure of the current limiter of the present invention; Figure 3 Schematic diagram of the external structure of the current limiter of the present invention; Figure 4 It is a schematic AA cross-sectional view of a two-stage current limiter in a multi-stage noise reduction current limiter of the present invention; Figure 5It is a BB cross-sectional schematic diagram of a three-stage current limiter in a multi-stage noise reduction current limiter of the present invention; Figure 6 It is a CC cross-sectional schematic diagram of a fourth-stage current limiter in a multi-stage noise reduction current limiter of the present invention when the spring is not compressed; Figure 7 It is a DD sectional schematic diagram of a fourth-stage current limiter in a multi-stage noise reduction current limiter of the present invention when the spring is compressed.

[0018] Numbers in the figure: 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 hole; 21-second flow limiting hole; 31-third flow limiting hole; 41-fourth flow limiting hole; 101-housing; 102-flow limiting plate; 103-water inlet; 104-water outlet; 105-flow limiting hole. DETAILED DESCRIPTION

[0019] Example 1: In the description of the present invention, it should be noted that the flow limiting hole 105 includes a first flow limiting hole 11, a second flow limiting hole 21, a third flow limiting hole 31 and a fourth flow limiting hole 41, which is only for the convenience of describing the present invention and simplifying the description.

[0020] 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, as shown Figure 2 and Figure 3 As shown, the first-stage flow restrictor body 1 is provided with a plurality of first flow limiting holes 11, and the second-stage flow restrictor body 2 is provided with a plurality of second flow limiting holes 21; the spring 5 is movably provided between the first-stage flow restrictor body 1 and the second-stage flow restrictor body 2 along the direction of water flow, and the spring 5 seals the water outlet 104 under the pressure of water flow; Figure 4 As shown, when the second-stage flow limiter body 2 and the spring 5 are inoperative, the first-stage flow limiter body 1 works independently, and when the spring 5 is compressed, the second-stage flow limiter body 2 starts to work.

[0021] The noise reduction flow limiter of 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 by multiple first flow limiting holes 11 inside it to reduce the water flow speed and pressure; then the water flow enters the second-stage flow limiter body 2 and is further limited by the second flow limiting holes 21. The size and number of the 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 and low cost, and is suitable for general fluid control systems.

[0022] Example 2: 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 arranged 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 direction of water flow. The spring 5 seals the water outlet 104 under the pressure of water flow. Depending on the position of the spring 5, when the spring 5 is not in effect, the flow limiter 102 in front of the spring 5 is ineffective, and the flow limiter 102 behind the spring 5 is effective. When the spring 5 is compressed, the flow limiter 102 in front of the spring 5 starts to work.

[0023] This embodiment adds a third-stage flow limiter body 3 on the basis of Example 1 to form a three-stage flow limiting structure. The flow limiting hole parameters of each stage of the flow limiter are optimized according to different water pressure ranges. The three-stage noise reduction flow limiter is suitable for occasions with flow limitation and noise reduction requirements, such as water supply systems of high-rise buildings.

[0024] Example 3: See Figure 6 and Figure 7 This embodiment is basically the same as embodiment 1, except that the noise reduction flow limiter is a four-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, a fourth-stage flow limiter body 4 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, the third-stage flow limiter body 3 is provided with a plurality of third flow limiting holes 31, and the fourth-stage flow limiter body 4 is provided with a plurality of fourth flow limiting holes 41; Figure 6 As shown, the spring 5 can be arranged 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 in a manner movable along the water flow direction. The spring 5 seals the water outlet 104 under the pressure of the water flow. Depending on the position of the spring 5, when the spring 5 is not working, the flow restrictor 102 in front of the spring 5 is not working, and the flow restrictor 102 behind the spring 5 is working. Figure 7 As shown, when the spring 5 is compressed, the flow limiting plate 102 in front of the spring 5 starts to work.

[0025] The noise-reducing flow restrictor of this embodiment adopts a four-stage flow restrictor design, which further improves the flow limiting and noise reduction effects; the flow limiting holes 105 of each stage of the flow restrictor gradually decrease in size and increase in number, so that the water flow can be more finely regulated when passing through each stage of the flow restrictor; in addition, in order to adapt to the flow control requirements under different water pressures, a spring 5 is provided inside the flow restrictor. When the water pressure changes, the compression or extension of the spring 5 can change the effective flow area of ​​the flow limiting holes 105, thereby realizing the function of automatically adjusting the flow; when the spring 5 is uncompressed, only the flow limiting holes 105 of the first three stages limit the flow, and the flow is controlled by the first three stages; when the spring 5 is compressed, the pressure causes the third-stage flow restrictor body 3 and the fourth-stage flow restrictor body 4 to fit together, and the fourth flow limiting holes 41 of the fourth-stage flow restrictor body 4 simultaneously limit the flow, thereby enhancing the flow limiting capacity; in this embodiment, this four-stage flow restrictor has a complex structure but superior 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.

[0026] Working principle: When water flows into the noise reduction restrictor, it enters the first-stage restrictor body 1 from the water inlet 103, passes through the first limiting hole 11, and the water flow velocity and pressure are initially reduced; then the water flows into the next-stage restrictor in sequence, the limiting hole 105 of the upper-stage restrictor is larger than or equal to the limiting hole 105 of the lower-stage restrictor, and the distance between the upper and lower restrictors needs to be more than 1 times the equivalent aperture of the limiting hole 105; the spring 5 can be moved along the direction of water flow and can be set between any two of the first-stage restrictor body 1, the second-stage restrictor body 2, the third-stage restrictor body 3 and the fourth-stage restrictor body 4; when the spring 5 is not working, the limiting plate 102 in front of the spring 5 is not working, and the limiting plate 102 behind the spring 5 is working; when the water presses the spring 5 to compress it, the limiting plate 102 in front of the spring 5 starts to work, further limiting the flow and reducing noise, and finally the water flows out from the water outlet 104.

[0027] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls 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 comprises at least two stages of flow limiter bodies. Each stage of the flow limiter body is provided with a plurality of flow limiting holes. The upper stage of the flow limiter body is matched with the lower stage of the flow limiter body for installation.

2. The multi-stage noise reduction current limiter according to claim 1, characterized in that: The noise reduction flow limiter comprises a first-stage flow limiter body (1), a second-stage flow limiter body (2) and a spring (5); the first-stage flow limiter body (1) is provided with a plurality of first flow limiting holes (11), and the second-stage flow limiter body (2) is provided with a plurality of second flow limiting holes (21); the spring (5) is arranged between the first-stage flow limiter body (1) and the second-stage flow limiter body (2) and is movable along the direction of water flow; the spring (5) seals the water outlet (104) under the pressure of water flow; when the second-stage flow limiter body (2) and the spring (5) are not in operation, the first-stage flow limiter body (1) works independently, and when the spring (5) is compressed, the second-stage flow limiter body (2) starts to work.

3. The multi-stage noise reduction current limiter according to claim 2, characterized in that: The flow limiter body comprises a shell (101), a flow limiting plate (102), a water inlet (103), a water outlet (104) and flow limiting holes (105); the shell (101) is in the shape of a cylinder with a hollow structure inside; the flow limiting plate (102) is inside the shell (101); the water inlet (103) is located at one end of the shell (101); the water outlet (104) is located at the other end of the shell (101); and the flow limiting holes (105) are distributed on the flow limiting plate (102).

4. The multi-stage noise reduction current limiter according to claim 3, characterized in that: The flow limiting plate (102) and the housing (101) are an integrally formed structure.

5. The multi-stage noise reduction current limiter according to claim 3, characterized in that: The flow limiting plate (102) and the housing (101) are detachable structures.

6. The multi-stage noise reduction current limiter according to claim 1, characterized in that: The flow limiter comprises 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 movable along the direction of water flow and can be arranged 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); and the spring (5) seals the water outlet (104) under the pressure of water flow.

7. The multi-stage noise reduction current limiter according to claim 1, characterized in that: The flow limiter comprises a first-stage flow limiter body (1), a second-stage flow limiter body (2), a third-stage flow limiter body (3), a fourth-stage flow limiter body (4) 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); the third-stage flow limiter body (3) is provided with a plurality of third flow limiting holes (31); and the fourth-stage flow limiter body (4) is provided with a plurality of fourth flow limiting holes (41); the spring (5) is movable along the direction of water flow and can be arranged between any two of the first-stage flow limiter body (1), the second-stage flow limiter body (2), the third-stage flow limiter body (3) and the fourth-stage flow limiter body (4); and the spring (5) seals the water outlet (104) under the pressure of water flow.

8. A multi-stage noise reduction current limiter according to any one of claims 2 to 7, characterized in that: The spring (5) can have a plurality of portions arranged between the two stages, and the arrangement position can be adjusted. When the spring (5) is not working, the flow limiting plate (102) in front of the spring (5) is not working, and the flow limiting plate (102) behind the spring (5) is working; when the spring (5) is compressed, the flow limiting plate (102) in front of the spring (5) starts to work.

9. A multi-stage noise reduction current limiter according to any one of claims 2 to 7, characterized in that: The aperture of the flow limiting hole (105) of the upper-stage flow limiter is greater than or equal to the aperture of the flow limiting hole (105) of the lower-stage flow limiter, and the distance between the upper and lower stages of the flow limiter is more than 1 times the equivalent aperture of the flow limiting hole (105).

Images