Multi-layer noise reduction valve cage

Abstract

The utility model relates to the technical field of valves, in particular to a multi-layer noise reduction valve cage which comprises an inner-layer valve cage and an outer-layer valve cage. The middle-layer valve cage is arranged on the outer side of the inner-layer valve cage in a sleeving manner; the outer layer valve cage is arranged on the outer side of the middle layer valve cage in a sleeving manner; wherein the inner-layer valve cage, the middle-layer valve cage and the outer-layer valve cage are all provided with micropores, and the micropores in the inner-layer valve cage, the micropores in the middle-layer valve cage and the micropores in the outer-layer valve cage are arranged in a staggered mode. The middle-layer valve cage and the outer-layer valve cage are sleeved on the inner-layer valve cage, so that a multi-layer valve cage structure is realized, and staggered micropores are formed in the multi-layer valve cage, so that turbulent flow is reduced, expected speed distribution is obtained on an expanded area, noise can be reduced, and the flow capacity of the valve is not influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a multi-layer silencing valve cage. Background Art

[0002] A control valve is a pipeline accessory that regulates fluids through energy conversion. Noise will be generated during the energy conversion process. The noise of the control valve includes mechanical dynamic noise, liquid dynamic noise, and aerodynamic noise. When the device is in normal use, generally only the liquid dynamic noise exceeds the specified limit, and the generated noise is mainly cavitation noise and aerodynamic noise.

[0003] In the related art, the main method for dealing with cavitation noise is to use a valve core made of high-strength and high-hardness materials. The main methods for dealing with aerodynamic noise are mainly pipeline treatment methods or sound source treatment methods, and the control valve itself or its structure is modified, such as grooved type, zigzag channel type, or porous type, etc.

[0004] However, the above methods have the problems of high manufacturing cost and maintenance cost. Since too large an opening area will reduce the silencing effect, and too small an opening area will be blocked by impurities in the fluid. Summary of the Utility Model

[0005] In view of at least one of the above technical problems, the utility model provides a multi-layer silencing valve cage, which adopts a multi-layer valve cage structure to ensure a small noise while not affecting the flow capacity.

[0006] According to a first aspect of the utility model, there is provided a multi-layer silencing valve cage, comprising:

[0007] An inner layer valve cage;

[0008] A middle layer valve cage, the middle layer valve cage being sleeved outside the inner layer valve cage;

[0009] An outer layer valve cage, the outer layer valve cage being sleeved outside the middle layer valve cage;

[0010] Wherein, the inner layer valve cage, the middle layer valve cage, and the outer layer valve cage all have micropores, and the micropores on the inner layer valve cage, the middle layer valve cage, and the outer layer valve cage are arranged in a staggered manner.

[0011] In some embodiments of the utility model, there are multiple groups of the micropores on the inner layer valve cage, the middle layer valve cage, and the outer layer valve cage, and the multiple groups of micropores are spaced at a certain angle.

[0012] In some embodiments of the utility model, the inner layer valve cage is circumferentially distributed with wave-shaped teeth, and the middle layer valve cage and the outer layer valve cage are connected to the inner layer valve cage through wave-shaped tooth grooves.

[0013] In some embodiments of the present utility model, the wavy teeth on the inner valve cage are arranged at intervals.

[0014] In some embodiments of the present utility model, the outer-facing surface of the inner valve cage has a "concave" groove for connecting with the valve seat, and the end surface on the other side of the inner valve cage and the middle valve cage is on the same plane to form a groove for connecting with the valve body.

[0015] In some embodiments of the present utility model, the multi-layer silencing valve cage is used in combination with a linear valve cage.

[0016] In some embodiments of the present utility model, the multi-layer silencing valve cage is used in combination with a quick-opening valve cage.

[0017] In some embodiments of the present utility model, the multi-layer silencing valve cage is used in combination with an equal percentage valve cage.

[0018] In some embodiments of the present utility model, the middle valve cage has a V-shaped hole, the outer valve cage has a through hole, and the middle valve cage and the outer valve cage are connected through the V-shaped hole and the through hole.

[0019] In some embodiments of the present utility model, the inner valve cage has an exhaust hole on one side of the micropores.

[0020] The beneficial effects of the present utility model are as follows: By sleeving the middle valve cage and the outer valve cage on the inner valve cage, a multi-layer valve cage structure is realized. And by arranging staggered micropores on the multi-layer valve cage to reduce turbulence and obtain a desired velocity distribution over an extended area, noise can be reduced without affecting the flow capacity of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a schematic structural diagram of the multi-layer silencing valve cage in the embodiment of the present utility model;

[0023] Figure 2 It is a schematic structural diagram of the inner valve cage in the embodiment of the present utility model;

[0024] Figure 3 It is a schematic structural diagram of the middle valve cage in the embodiment of the present utility model;

[0025] Figure 4 Schematic diagram of the outer valve cage in the embodiment of the present utility model;

[0026] Figure 5 Top view of the multi-layer silencing valve cage in the embodiment of the present utility model;

[0027] Figure 6 In the embodiment of the present utility model Figure 5 Cross-sectional view taken along line A-A;

[0028] Figure 7 In the embodiment of the present utility model Figure 1 Partial enlarged view at position B;

[0029] Figure 8 In the embodiment of the present utility model Figure 1 Partial enlarged view at position C;

[0030] Figure 9 Schematic diagram of the structure of the linear valve cage in the embodiment of the present utility model;

[0031] Figure 10 Schematic diagram of the structure of the quick-opening valve cage in the embodiment of the present utility model;

[0032] Figure 11 Schematic diagram of the structure of the equal percentage valve cage in the embodiment of the present utility model. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0034] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0036] As Figures 1 to 11The multi-layer sound silencing valve cage shown includes: an inner layer valve cage 1, a middle layer valve cage 2, and an outer layer valve cage 3;

[0037] As shown in Figures 1-2 As shown in the figure, the inner layer valve cage 1, as the innermost layer, is the first to come into contact with the medium. The medium can be a gas or a liquid. First, the inner layer valve cage 1 initially disperses and alleviates the impact force and velocity when the fluid passes through, thereby reducing the generation of noise;

[0038] As shown in Figure 1 and Figure 3 As shown in the figure, the middle layer valve cage 2 is sleeved on the outside of the inner layer valve cage 1; the middle layer valve cage 2 is designed with several layers, all sleeved on the outside of the inner layer valve cage 1, further enhancing the dispersion and deceleration effect of the fluid, making the fluid more stable when passing through, reducing the formation of turbulence, and thus reducing noise;

[0039] As shown in Figure 1 and Figure 4 As shown in the figure, the outer layer valve cage 3 is sleeved on the outside of the middle layer valve cage 2; as the outermost layer, the outer layer valve cage 3 not only protects the inner layer valve cage 1 and the middle layer valve cage 2 from external environmental interference, but also further disperses and decelerates the fluid, forming an efficient sound silencing barrier;

[0040] Among them, as shown in Figure 6 As shown in the figure, the inner layer valve cage 1, the middle layer valve cage 2, and the outer layer valve cage 3 all have micropores 02, and the micropores 02 on the inner layer valve cage 1, the middle layer valve cage 2, and the outer layer valve cage 3 are arranged in a staggered manner; the design of the staggered arrangement of the micropores 02 enables the fluid to be dispersed, decelerated, and diffused multiple times when passing through, greatly reducing the fluid dynamic noise and mechanical vibration noise. The multi-layer nested structure enhances the overall rigidity and stability of the multi-layer sound silencing valve cage, enabling it to maintain a good working state in a high-pressure and high-speed fluid environment. At the same time, since the fluid is fully dispersed and decelerated in the multi-layer valve cage, the direct impact and wear on the valve cage material are reduced, thereby extending the service life of the valve cage; it should be noted here that the materials of the inner layer valve cage 1, the middle layer valve cage 2, and the outer layer valve cage 3 should have good sound silencing performance, and have high strength and corrosion resistance, and can be materials such as Cr18Ni9Ti, Cr18Ni2Mo2Ti, 316L, etc., to improve their sound silencing performance and durability.

[0041] In some embodiments of the present invention, as shown in Figure 6As shown, there are multiple groups of micro-holes 02 on the inner valve cage 1, the middle valve cage 2, and the outer valve cage 3. The multiple groups of micro-holes 02 are spaced at a certain angle. The multi-layer design of the inner valve cage 1, the middle valve cage 2, and the outer valve cage 3 can increase the throttling path of the fluid, improve the throttling effect. At the same time, the multi-layer structure helps to disperse the fluid pressure and reduce the impact on a single layer. The micro-holes 02 being spaced at a certain angle can prevent excessive vibration and noise when the fluid passes through the valve cage. Moreover, the number and size of the micro-holes 02 will affect the flow rate and pressure difference of the fluid. The more the number of micro-holes 02 and the smaller the aperture, the more obvious the throttling effect, but it will increase the resistance of fluid flow. Therefore, those skilled in the art set the number, aperture, and layout of the micro-holes 02 according to requirements to maintain the balance between the throttling effect and the fluid flow resistance.

[0042] In some embodiments of the present utility model, as Figure 7 shown, the inner valve cage 1 is circumferentially distributed with wavy teeth 01, and the middle valve cage 2 and the outer valve cage 3 are connected to the inner valve cage 1 through the wavy teeth 01 grooves. The design of the wavy teeth 01 can increase the contact area between the inner valve cage 1 and the middle valve cage 2 and the outer valve cage 3, forming multiple sealing lines, thereby improving the sealing performance of the valve. When the internal pressure of the valve increases, the wavy teeth 01 will produce a certain elastic deformation, further enhancing the sealing effect. Compared with linear or planar contact, the design of the wavy teeth 01 can disperse the contact stress, reduce friction and wear, and extend the service life of the valve. The wavy teeth 01 not only provide connection points but also ensure the precise axial positioning of the middle valve cage 2 and the outer valve cage 3. This setting is beneficial to maintaining the overall structural stability and sealing performance of the valve.

[0043] In some embodiments of the present utility model, continue to refer to Figure 7 , the wavy teeth 01 on the inner valve cage 1 are arranged at intervals. By setting the interval distance of the wavy teeth 01, the distance between the inner valve cage 1, the middle valve cage 2, and the outer valve cage 3 can be controlled. By adjusting the distance between the valve cages, the noise generated when the fluid passes through can be reduced.

[0044] In some embodiments of the present utility model, as Figure 1 shown, the outer-facing surface of the inner valve cage 1 has a "concave" groove for connecting with the valve seat. The middle valve cage 2 and the end face on the other side of the middle valve cage 2 are on the same plane, forming a groove for connecting with the valve body. The main purpose of the groove is to make the inner valve cage 1 and the valve seat form a tight fit. As Figure 5 shown, mounting holes are provided on the inner valve cage 1 for connecting with a valve seat that also has mounting holes. An O-ring and a sealing ring are provided between the inner valve cage 1 and the valve seat to ensure the sealing performance. The sealing elements are conventional technical means and will not be elaborated here.

[0045] In some embodiments of the present utility model, asFigure 9 As shown in [figure reference], the multi-layer silencing valve cage is used in combination with the linear valve cage 03. Valves with linear characteristics are commonly used in liquid level control and fluid control applications that require a rated gain. By combining the multi-layer silencing valve cage with the linear valve cage 03, the advantages of both can be integrated, achieving both precise fluid control and effective noise reduction, and being suitable for high-precision fluid control systems.

[0046] In some embodiments of the present invention, as Figure 10 As shown in [figure reference], the multi-layer silencing valve cage is used in combination with the quick-opening valve cage 04. The quick-opening valve cage 04 focuses on achieving the quick opening and closing functions of the valve. The quick-opening valve cage 04 can provide the largest flow change at a low stroke position, and the flow curve is basically linear in the early stage, being suitable for applications that require quick flow adjustment. By combining the multi-layer silencing valve cage with the quick-opening valve cage 04, it can be applied to occasions with high requirements for fluid control and strict requirements for noise control.

[0047] In some embodiments of the present invention, as Figure 11 As shown in [figure reference], the multi-layer silencing valve cage is used in combination with the equal percentage valve cage 05. The equal percentage valve cage 05 has an equal percentage flow characteristic, that is, there is an equal percentage relationship between the opening of the valve and the flow rate. This characteristic makes the valve more precise and stable when adjusting the flow rate, being suitable for applications that require fine flow control. By combining the multi-layer silencing valve cage with the equal percentage valve cage 05, the goals of noise reduction and precise flow control can be achieved simultaneously.

[0048] In some embodiments of the present invention, as Figure 8 As shown in [figure reference], the middle layer valve cage 2 has a V-shaped hole 21, and the outer layer valve cage 3 has a through hole 31. The middle layer valve cage 2 and the outer layer valve cage 3 are connected through the V-shaped hole 21 and the through hole 31. Through the design of the V-shaped hole 21 and the through hole 31, parts can be replaced more flexibly, reducing the maintenance cost.

[0049] In some embodiments of the present invention, as Figure 6 As shown in [figure reference], the inner layer valve cage 1 has an exhaust hole on one side of the micro-hole 02. The setting of the exhaust hole can timely discharge the gas accumulated inside the multi-layer silencing valve cage when the fluid passes through, preventing the occurrence of air resistance phenomenon, and ensuring the smoothness of fluid flow and the stability of the system.

[0050] Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-layer silencer cage, characterized in that: include: Inner cage; A middle valve cage, wherein the middle valve cage is sleeved on the outer side of the inner valve cage; An outer valve cage, wherein the outer valve cage is sleeved on the outer side of the middle valve cage; The inner valve cage, the middle valve cage and the outer valve cage all have micropores, and the micropores on the inner valve cage, the middle valve cage and the outer valve cage are arranged alternately.

2. The multi-layered muffler cage according to claim 1, characterized in that: There are multiple groups of micropores on the inner valve cage, the middle valve cage and the outer valve cage, and the multiple groups of micropores are spaced at a certain angle.

3. The multi-layered muffler cage according to claim 1, characterized in that: The inner valve cage has wavy teeth distributed circumferentially, and the middle valve cage and the outer valve cage are connected to the inner valve cage through wavy tooth grooves.

4. The multi-layered muffler cage according to claim 3, characterized in that: The wave teeth on the inner cage are arranged at a distance.

5. The multi-layered muffler cage according to claim 1, characterized in that: The inner valve cage has a concave groove on its outward surface and is provided with a mounting hole for connecting with the valve seat. The inner valve cage and the end surface on the other side of the middle valve cage are located on the same surface to form a groove for connecting with the valve body.

6. The multi-layered muffler cage according to claim 1, characterized in that: The multi-layered muffler cage is used in combination with a linear cage.

7. The multi-layered muffler cage according to claim 1, characterized in that: The multi-layer silencer cage is used in combination with a quick-opening cage.

8. The multi-layered muffler cage according to claim 1, characterized in that: The multi-layered muffler cage is used in combination with an equal percentage cage.

9. The multi-layered muffler cage according to claim 1, characterized in that: The middle valve cage has a V-shaped hole, the outer valve cage has a through hole, and the middle valve cage and the outer valve cage are connected through the V-shaped hole and the through hole.

10. The multi-layered muffler cage according to claim 1, characterized in that: The inner cage has an exhaust hole on one side of the micropore.

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