Double-layer silencing valve cage and regulating valve

Abstract

The utility model relates to the field of fuel gas pressure regulation, in particular to a double-layer noise reduction valve cage and a regulating valve, which comprises an inner-layer valve cage, a plurality of first noise reduction holes, a second-layer valve cage and a third-layer valve cage, the outer-layer valve cage is arranged outside the inner-layer valve cage in a sleeving manner and fixedly connected with the inner-layer valve cage, and a plurality of second silencing holes which are arranged according to a second rule are formed in the outer-layer valve cage; and the inner-layer valve cage and the outer-layer valve cage are coaxially arranged. According to the utility model, the inner-layer valve cage is used for preliminarily dispersing pressure waves and noise of fluid through the plurality of first silencing holes arranged according to the first rule, the outer-layer valve cage is used for further absorbing and scattering residual noise generated by the inner-layer fluid through the second silencing holes, and the inner-layer valve cage and the outer-layer valve cage are coaxially arranged; the additional flow resistance generated when fluid penetrates through different layers can be reduced, and meanwhile the continuity of a flow channel is guaranteed. Under the conditions of high pressure difference and large flow, noise of the regulating valve is effectively reduced, it is ensured that the noise level does not exceed 85 decibels, and the requirements of specific application occasions are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of gas pressure regulating, especially to a double-layer sound attenuation valve cage and regulating valve. BACKGROUND

[0002] The axial flow type regulating valve in the field of gas pressure regulating is suitable for high pressure and large flow working conditions, and is commonly used in adjusting user pressure or flow occasions, when a large pressure difference is encountered, the noise will be particularly large under the condition of normal operation of the regulating valve.

[0003] Although the existing perforated sound attenuation valve cage can reduce the noise during the operation of the regulating valve, sometimes the noise will still exceed 85 decibels, and in some application occasions, the noise needs to be no more than 85 decibels, so the existing sound attenuation valve cage cannot meet the noise reduction demand.

[0004] The information disclosed in this BACKGROUND section is only for the purpose of enhancing the understanding of the background of the utility model and should not be treated as acknowledging that this information forms prior art that is already known to those of ordinary skill in the art. SUMMARY

[0005] The utility model provides a double-layer sound attenuation valve cage and regulating valve, thereby effectively solve the problem in the background art.

[0006] In order to achieve the above purpose, the utility model adopts the technical scheme of a double-layer sound attenuation valve cage, comprising:

[0007] The inner layer valve cage is provided with a plurality of first sound attenuation holes arranged according to a first rule;

[0008] The outer layer valve cage is sleeved on the outer layer of the inner layer valve cage and is fixedly connected with the inner layer valve cage, and the outer layer valve cage is provided with a plurality of second sound attenuation holes arranged according to a second rule;

[0009] The inner layer valve cage and the outer layer valve cage are coaxially arranged.

[0010] Further, the inner layer valve cage is provided with an annular stepped surface at one end in the axial direction, the outer layer valve cage is correspondingly provided with a groove, the groove and the annular stepped surface are matched with each other, one end in the axial direction of the outer layer valve cage is limited, and the inner layer valve cage and the outer layer valve cage are fixedly connected at the other end away from the annular stepped surface.

[0011] Further, the outer layer valve cage is provided with an annular protrusion at the other end away from the annular stepped surface, the annular protrusion is located in the inner diameter of the outer layer valve cage, the inner layer valve cage is correspondingly provided with an annular avoidance structure, and the inner layer valve cage and the outer layer valve cage are welded and fixed through the annular protrusion and the annular avoidance structure.

[0012] Further, the annular protrusion and the annular clearance structure welding are located in the outer layer valve cage.

[0013] Further, the inner layer valve cage is provided with positioning holes on the outer wall, and the outer layer valve cage is correspondingly provided with through holes and positioning pins, the positioning pins and the positioning holes are matched with each other to position the inner layer valve cage and the outer layer valve cage in the circumferential direction.

[0014] Further, the number of the first sound attenuation holes is less than the number of the second sound attenuation holes.

[0015] Further, the first sound attenuation holes and the second sound attenuation holes have the same hole diameter, and the first sound attenuation holes and the second sound attenuation holes are arranged in a staggered manner in the circumferential direction.

[0016] Further, the number of the first sound attenuation holes and the second sound attenuation holes is greater at one end of the inner layer valve cage and the outer layer valve cage in the axial direction than at the other end.

[0017] The utility model also includes a regulating valve, including the double layer sound attenuation valve cage of above.

[0018] The utility model discloses the beneficial effects are: the inner layer valve cage is primarily dispersed the pressure wave and noise of fluid through the first sound attenuation hole of arranging according to the first rule, and the outer layer valve cage further absorbs and scatters the residual noise of the inner layer fluid through the second sound attenuation hole, and the inner and outer layer valve cage is coaxial arrangement, can reduce the additional flow resistance when fluid passes through different layers, guarantees the continuity of flow channel simultaneously. The first sound attenuation hole and the second sound attenuation hole can be designed into different arrangement according to target noise frequency spectrum, thereby further reducing the superposition of noise using frequency mismatch. The double layer sound attenuation valve cage design scheme, through the differential arrangement and optimization of the inner and outer layer sound attenuation holes, can effectively reduce the noise of regulating valve under the condition of high pressure difference and large flow, and ensure that noise level does not exceed 85 decibels, satisfy the demand of specific application occasion. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, below will be to the drawing used in the embodiment or prior art description briefly introduced, obviously, the drawing in the following description only some embodiments in the utility model are recorded, for those skilled in the art, under the premise of not paying the creative labor, can also obtain other drawings according to these drawings.

[0020] Fig. 1 It is the structural schematic diagram of double layer sound attenuation valve cage;

[0021] Fig. 2 It is the structural schematic diagram of inner layer valve cage;

[0022] Fig. 3This is a schematic diagram of the outer valve cage structure;

[0023] Fig. 4 This is a cross-sectional view of a double-layer silencer valve cage.

[0024] Fig. 5 This is a cross-sectional view of the inner valve cage;

[0025] Fig. 6 This is a cross-sectional view of the outer valve cage. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0027] like Figs. 1 to 6 As shown: A double-layer silencer valve cage, comprising:

[0028] The inner valve cage 1 is provided with a number of first silencer holes 11 arranged in a first pattern.

[0029] The outer valve cage 2 is sleeved outside the inner valve cage 1 and fixedly connected to the inner valve cage 1. The outer valve cage 2 is provided with a number of second silencer holes 21 arranged in a second pattern.

[0030] The inner valve cage 1 and the outer valve cage 2 are coaxially arranged.

[0031] The inner valve cage 1 initially disperses the pressure waves and noise of the fluid through several first silencing holes 11 arranged in a first pattern. The outer valve cage 2 further absorbs and scatters the residual noise generated by the inner fluid through second silencing holes 21. The inner and outer valve cages 2 are coaxially arranged, which can reduce the additional flow resistance when the fluid passes through different layers, while ensuring the continuity of the flow channel. The first silencing holes 11 and the second silencing holes 21 can be designed with different arrangements according to the target noise spectrum, thereby further reducing the superposition of noise by utilizing frequency mismatch. The double-layer silencing valve cage design, through the differentiated arrangement and optimization of the inner and outer silencing holes, can effectively reduce the noise of the regulating valve under high pressure differential and high flow conditions, and ensure that the noise level does not exceed 85 decibels, meeting the needs of specific applications.

[0032] In this embodiment, the inner valve cage 1 is provided with an annular stepped surface 12 at one end of the axial direction, and the outer valve cage 2 is provided with a groove 22. The groove 22 and the annular stepped surface 12 cooperate with each other to limit one end of the outer valve cage 2 in the axial direction. The inner valve cage 1 and the outer valve cage 2 are fixedly connected at the other end away from the annular stepped surface 12.

[0033] The inner valve cage 1 is provided with an annular stepped surface 12 at one end in the axial direction, and the outer valve cage 2 is correspondingly provided with a groove 22, and the cooperation of the two is used for limiting. The inner valve cage 1 and the outer valve cage 2 are fixedly connected at the other end away from the annular stepped surface 12. This connection point provides stability for the inner and outer valve cages 2, ensuring that the two parts do not rotate or shift relative to each other during the entire working process.

[0034] In this embodiment, the outer valve cage 2 is provided with an annular protrusion 23 at the other end away from the annular stepped surface 12, and the annular protrusion 23 is located at the inner diameter of the outer valve cage 2. The inner valve cage 1 is correspondingly provided with an annular clearance structure 13, and the inner valve cage 1 and the outer valve cage 2 are welded and fixed through the annular protrusion 23 and the annular clearance structure 13.

[0035] The annular protrusion 23 ensures the firm combination of the outer valve cage 2 and the inner valve cage 1 in the radial direction, avoiding relative movement of the two due to fluid impact and vibration. It provides an additional mechanical support point, increasing the contact area between the inner and outer valve cages 2, thereby increasing the connection strength. Since the outer valve cage 2 and the inner valve cage 1 are welded by the cooperation of the annular protrusion 23 and the annular clearance structure 13, the connection strength is significantly improved. This can effectively withstand the pressure generated by the control valve under high pressure difference and large flow conditions.

[0036] As a preferred embodiment of the above, the welding position of the annular protrusion 23 and the annular clearance structure 13 is located inside the outer valve cage 2.

[0037] Setting the welding position inside the outer valve cage 2 means that the welding joint is located outside the fluid flow path, rather than directly in the airflow path. This design helps to avoid direct impact of high-pressure fluid on the welding joint area, thereby improving the durability of the welding joint. The inside welding position reduces the direct wear of the welding joint by high-speed airflow, prolonging the service life of the welding point.

[0038] In this embodiment, the inner valve cage 1 is provided with positioning holes 14 on the outer wall, and the outer valve cage 2 is correspondingly provided with through holes 24 and positioning pins. The positioning pins and the positioning holes 14 cooperate with each other to circumferentially position the inner valve cage 1 and the outer valve cage 2.

[0039] The positioning holes 14 provided on the outer wall of the inner valve cage 1 provide an accurate positioning reference for the outer valve cage 2. These positioning holes 14 can be precisely machined to ensure consistent positioning, avoiding deviations during assembly and ensuring that the relative position between the inner and outer valve cages 2 is always consistent. Through the cooperation of the positioning pins and the positioning holes 14, the inner and outer valve cages 2 are circumferentially positioned. This design helps to ensure the stability of the overall position of the two valve cages after assembly, avoiding structural instability caused by relative rotation or displacement.

[0040] In this embodiment, the number of first sound attenuation holes 11 is less than the number of second sound attenuation holes 21.

[0041] By making the number of first sound attenuation holes 11 of the inner valve cage 1 less than the number of second sound attenuation holes 21 of the outer valve cage 2, this design can effectively control the sound attenuation effect of different layers. The design of a larger number of second sound attenuation holes 21 can help provide a larger fluid passage, thereby better reducing the pressure fluctuation and noise of the airflow.

[0042] This design can make the airflow gradually attenuate when passing through the outer and inner sound attenuation holes, thereby effectively reducing noise. The small number of sound attenuation holes of the inner valve cage 1 can attenuate the sound wave initially, providing a smoother airflow path for the second sound attenuation holes 21 of the outer valve cage 2, further enhancing the sound attenuation effect.

[0043] In this embodiment, the first sound attenuation holes 11 and the second sound attenuation holes 21 have the same hole diameter, and the first sound attenuation holes 11 and the second sound attenuation holes 21 are arranged in a circumferential staggered manner.

[0044] The circumferential staggered arrangement of the first sound attenuation holes 11 and the second sound attenuation holes 21 can avoid the direct alignment of the airflow when passing through the sound attenuation holes, thereby reducing the reflection and turbulence of the airflow. This staggered design can optimize the flow state of the airflow passing through the sound attenuation holes, reducing the noise generated by the airflow impact. The staggered arrangement of the sound attenuation holes can reduce the resonance effect between the holes, making the sound attenuation effect smoother, avoiding resonance or interference of different hole diameters under the action of the airflow, thereby improving the overall sound attenuation efficiency.

[0045] As a preferred embodiment of the above, the number of first sound attenuation holes 11 and second sound attenuation holes 21 at one end of the inner valve cage 1 and outer valve cage 2 in the axial direction is greater than the other end.

[0046] Setting more sound attenuation holes at one end of the axial direction can effectively slow down the airflow speed near the inlet or outlet position, reducing the noise generated at these positions. Reducing the number of sound attenuation holes at the other end may be to avoid excessive restriction of airflow, maintaining the stability and efficiency of fluid flow. Through this layout, the airflow will experience a gradual sound attenuation process when passing through the valve cage, so that the noise is better attenuated at different axial positions, improving the overall sound attenuation effect.

[0047] The present embodiment also includes a regulating valve comprising a double-layer sound attenuation valve cage as described above.

[0048] The double-layer sound attenuation valve cage design scheme, through the differential arrangement and optimization of the inner and outer sound attenuation holes, can effectively reduce the noise of the regulating valve under high pressure difference and large flow, and ensure that the noise level does not exceed 85 decibels, meeting the needs of specific application occasions.

[0049] In the description of the utility model, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. The meaning of "a plurality of" is two or more than two, unless otherwise specifically limited.

[0050] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the communication or interaction of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0051] In the description of the specification, the description of the reference terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0052] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary, and cannot be understood as limiting the utility model, and the ordinary skilled in the art can change, modify, replace and modify the above-mentioned embodiments within the scope of the utility model.

Claims

1. A double-layer silencer valve cage, characterized in that, include: The inner valve cage is provided with a plurality of first silencer holes arranged in a first pattern; An outer valve cage is fitted over the inner valve cage and fixedly connected to it. The outer valve cage is provided with a plurality of second silencer holes arranged in a second pattern. The inner valve cage and the outer valve cage are coaxially arranged.

2. The double-layer silencer valve cage according to claim 1, characterized in that, The inner valve cage has an annular stepped surface at one end in the axial direction, and the outer valve cage has a corresponding groove. The groove and the annular stepped surface cooperate with each other to limit one end of the outer valve cage in the axial direction. The inner valve cage and the outer valve cage are fixedly connected at the other end away from the annular stepped surface.

3. The double-layer silencer valve cage according to claim 2, characterized in that, The outer valve cage has an annular protrusion at the end away from the annular step surface. The annular protrusion is located on the inner diameter of the outer valve cage. The inner valve cage has a corresponding annular clearance structure. The inner valve cage and the outer valve cage are welded and fixed together by the annular protrusion and the annular clearance structure.

4. The double-layer silencer valve cage according to claim 3, characterized in that, The weld between the annular protrusion and the annular clearance structure is located inside the outer valve cage.

5. The double-layer silencer valve cage according to claim 1, characterized in that, The inner valve cage has a positioning hole on its outer wall, and the outer valve cage has a corresponding through hole and positioning pin. The positioning pin cooperates with the positioning hole to perform circumferential positioning of the inner and outer valve cages.

6. The double-layer silencer valve cage according to claim 1, characterized in that, The number of the first silencing holes is less than the number of the second silencing holes.

7. The double-layer silencer valve cage according to claim 6, characterized in that, The first and second silencing holes have the same diameter, and the first and second silencing holes are offset in the circumferential direction.

8. The double-layer silencer valve cage according to claim 6, characterized in that, The number of the first and second silencing holes is greater at one end of the inner and outer valve cages along their axial direction than at the other end.

9. A regulating valve, characterized in that, Includes a double-layer silencer valve cage as described in any one of claims 1 to 8.

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