A quick replacement structure for sound-absorbing cotton in a screw vacuum pump silencer

Abstract

This utility model discloses a quick replacement structure for sound-absorbing cotton in a screw vacuum pump silencer, relating to the field of silencer design technology. It includes a housing, with an outer sound-absorbing cotton and an inner sound-absorbing cotton disposed within the housing. Multiple lifting components are arranged between the outer and inner sound-absorbing cotton. A fitting groove is provided on the outer wall of the inner sound-absorbing cotton for installing the lifting components. Fixed inserts are provided between the lifting components. Multiple lifting components are assembled and combined through the fixed inserts. The lifting components restrict the position of the outer and inner sound-absorbing cotton within the housing. This application achieves quick replacement by providing fixed inserts between the lifting components for flexible assembly. Furthermore, during disassembly, simply pulling out the fixed inserts allows for quick removal of the lifting components, outer sound-absorbing cotton, and inner sound-absorbing cotton, thus reducing the workload during replacement.

Description

Technical Field

[0001] This utility model relates to the field of silencer design technology, specifically a quick replacement structure for sound-absorbing cotton in a screw vacuum pump silencer. Background Technology

[0002] Screw vacuum pumps, widely used in chemical, pharmaceutical, and electronics industries, have long been a focus of industry attention due to the aerodynamic noise and mechanical vibration they generate during operation. To reduce noise pollution during pump operation, traditional screw vacuum pumps typically use external silencers. These silencers primarily work by filling the space between the outer casing and the inner core components with porous sound-absorbing materials such as glass wool and polyester fiber. The porous nature of these materials dissipates sound wave energy to achieve noise reduction. However, this type of fixed silencer structure has significant drawbacks in practical use: when the sound-absorbing material degrades due to long-term heating, oil mist corrosion, or dust blockage, the entire pump casing must be disassembled for replacement. This process is cumbersome and time-consuming, severely impacting equipment maintenance efficiency.

[0003] While modular, detachable noise-reducing structures have emerged in existing technologies, they generally employ threaded connections or snap-fit ​​fixing methods, which still present the following technical bottlenecks:

[0004] (1) The assembly precision requirements of the multi-layer sound-absorbing cotton and the supporting frame are high, and the fiber material is easily damaged during the disassembly and assembly process;

[0005] (2) Metal supports are directly exposed in the airflow channel, which may cause secondary noise radiation;

[0006] (3) The complex connection structure increases the labor intensity of maintenance personnel, especially when working at height or in confined spaces;

[0007] In addition, traditional sound-absorbing cotton lacks an effective support structure and is prone to collapse and deformation under long-term high-frequency vibration, resulting in a decline in local acoustic performance. Utility Model Content

[0008] This utility model aims to solve the above-mentioned technical problems. Through the following technical solution, it achieves efficient replacement of sound-absorbing materials and improves structural stability. This technical solution is specifically designed for the unique spiral motion characteristics of screw vacuum pumps. It optimizes the spatial layout and mechanical support system of the sound-absorbing cotton, which not only ensures the continuity of acoustic performance, but also significantly reduces maintenance costs. It has important practical value for improving the overall reliability of vacuum pumps.

[0009] A quick-replacement structure for sound-absorbing cotton in a screw vacuum pump silencer includes a housing, an outer sound-absorbing cotton disposed inside the housing, two pieces of the outer sound-absorbing cotton disposed inside the housing, the outer sound-absorbing cotton being inserted into the housing by compression, an inner sound-absorbing cotton disposed inside the housing, two pieces of the inner sound-absorbing cotton disposed inside the housing, the inner sound-absorbing cotton contacting the outer sound-absorbing cotton, and a sound-absorbing cotton main body disposed inside the inner sound-absorbing cotton, the sound-absorbing cotton main body being the last part placed in this structure.

[0010] Furthermore, multiple lifting components are provided between the outer and inner sound-absorbing cotton. The outer wall of the inner sound-absorbing cotton is provided with a fitting groove for installing the lifting components. Fixed rods are provided between the lifting components. Multiple lifting components are assembled and combined through fixed rods. The lifting components are used to limit the position of the outer and inner sound-absorbing cotton within the outer shell. The lifting components are used to assist in the installation or removal of the outer and inner sound-absorbing cotton.

[0011] Furthermore, the lifting assembly includes multiple inner arc strips, the inner arc strips are made of elastic material and are arc-shaped plates, and a rib plate is fixedly installed between two inner arc strips to improve the strength of the lifting assembly. Multiple side rods are provided between the inner arc strips to facilitate the assembly of multiple lifting assemblies.

[0012] Furthermore, protruding clips are fixedly installed on the side rod, and the protruding clips are located at both ends of the side rod and are used to embed into the fixed insert.

[0013] Furthermore, two retaining rings are fixedly installed on the side rod. The retaining rings are evenly distributed on the side rod. Each retaining ring consists of a fixed base and an arc plate. The arc plate is a three-fifths arc. The arc plate in the retaining ring is used to contact the outer wall of the fixed insertion rod. The retaining ring is used to restrict the position of the fixed insertion rod.

[0014] Furthermore, the fixing rod includes a pull handle and a slot post. The pull handle is for the convenience of the user to pull the fixing rod out of the lifting assembly. The pull handle is fixedly connected to the slot post. The slot post is provided with two fixing grooves, which are used to fit with the parts in the lifting assembly. The outer wall of the slot post is cylindrical.

[0015] Furthermore, the outer sound-absorbing cotton, inner sound-absorbing cotton, and sound-absorbing cotton body are used for sound absorption, and the material of the outer sound-absorbing cotton, inner sound-absorbing cotton, and sound-absorbing cotton body is wave-absorbing material.

[0016] The advantages of this utility model compared with the prior art are: (1) This application sets a fixed insert between the lifting components for flexible assembly. At the same time, when disassembling, the lifting components, outer sound-absorbing cotton and inner sound-absorbing cotton can be quickly removed by simply pulling out the fixed insert, thereby achieving the effect of quick replacement and reducing the workload during replacement; (2) This application wraps the lifting components with outer sound-absorbing cotton and inner sound-absorbing cotton to avoid the lifting components affecting the sound absorption effect. At the same time, the lifting components can also play a supporting role between the outer sound-absorbing cotton and inner sound-absorbing cotton, further improving the service life of this structure. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the external sound-absorbing cotton structure of this utility model.

[0019] Figure 3 This is a schematic diagram of the inner arc strip structure of this utility model.

[0020] Figure 4 This is a schematic diagram of the internal sound-absorbing cotton structure of this utility model.

[0021] Figure 5 This is a schematic diagram of the lifting component structure of this utility model.

[0022] Figure 6 This is a schematic diagram of the rib plate structure of this utility model.

[0023] Figure 7 This is a cross-sectional structural diagram of the side rod, protruding locking block, and locking groove column of this utility model.

[0024] Figure 8 This is a schematic diagram of the fixed insertion rod structure of this utility model.

[0025] Figure 9 This is a schematic diagram of the cross-sectional structure of the slotted column of this utility model.

[0026] Figure 10 This is an exploded view of the overall structure of this utility model.

[0027] Reference numerals: 10-Outer shell; 20-Outer sound-absorbing cotton; 30-Inner sound-absorbing cotton; 40-Main body of sound-absorbing cotton; 501-Inner arc strip; 502-Side rod; 503-Rib plate; 504-Protruding locking block; 505-Locking ring; 60-Fixing rod; 601-Pull handle; 602-Locking post. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0029] Example 1:

[0030] This embodiment discloses a quick replacement structure for sound-absorbing cotton in a screw vacuum pump silencer, specifically as follows: Figures 1 to 10 As shown, the structure includes an outer shell 10, inside which is an outer sound-absorbing cotton 20. Two pieces of the outer sound-absorbing cotton 20 are disposed inside the outer shell 10 and are inserted into the outer shell 10 by compression. Inside the outer shell 10, there are two pieces of inner sound-absorbing cotton 30. The inner sound-absorbing cotton 30 is in contact with the outer sound-absorbing cotton 20. The outer wall of the inner sound-absorbing cotton 30 is provided with a fitting groove for installing a lifting component. The inner wall of the outer sound-absorbing cotton 20 is in close contact with the inner sound-absorbing cotton 30. Inside the inner sound-absorbing cotton 30, there is a sound-absorbing cotton body 40. The sound-absorbing cotton body 40 is a single unit and is the last part placed in this structure. The outer sound-absorbing cotton 20, inner sound-absorbing cotton 30, and sound-absorbing cotton body 40 are used for sound absorption. The materials of the outer sound-absorbing cotton 20, inner sound-absorbing cotton 30, and sound-absorbing cotton body 40 are wave-absorbing materials.

[0031] Multiple lifting components are provided between the outer sound-absorbing cotton 20 and the inner sound-absorbing cotton 30, and fixed rods 60 are provided between the lifting components. The multiple lifting components are assembled and combined through the fixed rods 60. The lifting components are used to limit the position of the outer sound-absorbing cotton 20 and the inner sound-absorbing cotton 30 inside the outer shell 10. The lifting components are used to assist in the installation or removal of the outer sound-absorbing cotton 20 and the inner sound-absorbing cotton 30.

[0032] During assembly, first place the outer sound-absorbing cotton 20 on the inner wall of the outer shell 10, connecting the ends of multiple outer sound-absorbing cotton 20s. At this time, it is important to ensure that the contact points of the outer sound-absorbing cotton 20s are in close contact to prevent gaps. Then, fit the lifting component with the inner sound-absorbing cotton 30 by placing the lifting component in the fitting groove on the inner sound-absorbing cotton 30. At this point, the lifting component and the inner sound-absorbing cotton 30 can be placed on the inner wall of the outer sound-absorbing cotton 20 for assembly. Finally, insert the sound-absorbing cotton body 40 into the inner wall of the inner sound-absorbing cotton 30 to complete the assembly of this structure.

[0033] Example 2:

[0034] This embodiment further elaborates on the lifting structure based on Embodiment 1, specifically as follows: Figures 5 to 7As shown, the lifting assembly includes multiple inner arc strips 501, each made of an elastic material and an arc-shaped plate. A rib plate 503 is fixedly installed between two inner arc strips 501 to improve the strength of the lifting assembly. Multiple side rods 502 are provided between the inner arc strips 501 to facilitate the assembly of multiple lifting assemblies. A protruding locking block 504 is fixedly installed on each side rod 502 at both ends, and is used to embed into a fixing rod 60. Two retaining rings 505 are fixedly installed on the side rod 502. The retaining rings 505 are evenly distributed on the side rod 502. Each retaining ring 505 consists of a fixed base and an arc plate. The arc plate is a three-fifths arc. The arc plate in the retaining ring 505 is used to contact the outer wall of the fixed insertion rod 60. The fixed base in the retaining ring 505 is to prevent the two arc plates from contacting each other when the two lifting components are spliced. The retaining rings 505 are used to restrict the position of the fixed insertion rod 60. When the lifting components are connected through the insertion rod 60, the different retaining rings 505 on the two lifting components are staggered on the side rod 502.

[0035] Example 3:

[0036] This embodiment further elaborates on the lifting structure based on Embodiment 1, specifically as follows: Figures 5 to 7 As shown, the fixed insertion rod 60 includes a pull handle 601 and a slot post 602. The pull handle 601 is for the convenience of the user to pull the fixed insertion rod 60 out of the lifting assembly. The pull handle 601 is fixedly connected to the slot post 602. The slot post 602 is provided with two fixing grooves. The fixing grooves are used to engage with the protruding locking block 504 in the lifting assembly. The outer wall of the slot post 602 is cylindrical. The slot post 602 is used to engage with the retaining ring 505.

[0037] In use, multiple lifting components are assembled and connected by fixing rods 60. Each pair of lifting components is fixedly connected by inserting fixing rods 60. When disassembling, simply pull the fixing rods 60 out of the lifting components, and the lifting components and inner sound-absorbing cotton 30 can be removed.

[0038] Working principle: When assembling this structure, the first layer is an outer sound-absorbing cotton 20 laid on the inner wall of the outer shell 10. The thickness of the outer sound-absorbing cotton 20 can be determined according to the specific dimensions of the outer shell 10 during use. When installing the inner sound-absorbing cotton 30 and the lifting component, one inner sound-absorbing cotton 30 is first connected to one lifting component, and the lifting component is placed in the fitting groove. Then, the inner sound-absorbing cotton 30 and the lifting component are placed on the inner wall of the outer sound-absorbing cotton 20. During the specific installation, the inner sound-absorbing cotton 30 and the lifting component can be placed according to the ease of placement. Then, multiple inner sound-absorbing cotton 30s and lifting components are placed on the inner wall of the outer sound-absorbing cotton 20. When placing multiple lifting components in sequence, attention should be paid to the connection between the lifting components.

[0039] During installation, each pair of lifting components requires the insertion of a fixing rod 60 for connection. Inserting the fixing rod 60 involves pulling the handle 601 to engage with the protruding locking block 504 and the retaining ring 505, thus connecting the two lifting components. This creates a closed loop within the outer sound-absorbing cotton 20, supporting both the outer and inner sound-absorbing cotton 30. Finally, the sound-absorbing cotton body 40 is inserted into the inner sound-absorbing cotton 30 to complete the installation. Afterwards, the lifting component is completely wrapped between the outer sound-absorbing cotton 20 and the inner sound-absorbing cotton 30. At the same time, the structure of the lifting component and the fixing rod 60 needs to be set with a certain thickness according to the proportion to avoid the lifting component reducing the sound absorption effect. When it is necessary to replace the outer sound-absorbing cotton 20 and the inner sound-absorbing cotton 30, the user only needs to pull the fixing rod 60 out from between the lifting components. This allows for quick and convenient disassembly of the outer sound-absorbing cotton 20 and the inner sound-absorbing cotton 30. After that, the outer sound-absorbing cotton 20 and the inner sound-absorbing cotton 30 can be replaced.

[0040] The attached diagrams show the effect of two lifting components being spliced ​​together. In actual use, multiple installation modes such as three, four, or five sets can be selected according to the inner diameter of the outer shell 10. At the same time, the thickness of the outer sound-absorbing cotton 20 and the inner sound-absorbing cotton 30 need to be adjusted according to the inner diameter of the outer shell 10.

[0041] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model.

Claims

1. A quick replacement structure of sound-absorbing cotton for a screw vacuum pump muffler, comprising a shell (10), characterized in that: The outer shell (10) is provided with an outer sound-absorbing cotton (20), and two pieces of the outer sound-absorbing cotton (20) are provided inside the outer shell (10). The outer sound-absorbing cotton (20) is inserted into the outer shell (10) by compression. The outer shell (10) is provided with an inner sound-absorbing cotton (30), and two pieces of the inner sound-absorbing cotton (30) are provided inside the outer shell (10). The inner sound-absorbing cotton (30) is in contact with the outer sound-absorbing cotton (20). The inner sound-absorbing cotton (30) is provided with a sound-absorbing cotton body (40). The sound-absorbing cotton body (40) is the last part placed in this structure. Multiple lifting components are provided between the outer sound-absorbing cotton (20) and the inner sound-absorbing cotton (30). The outer wall of the inner sound-absorbing cotton (30) is provided with a fitting groove for installing the lifting components. Fixed rods (60) are provided between the lifting components. Multiple lifting components are assembled and combined through fixed rods (60). The lifting components are used to limit the position of the outer sound-absorbing cotton (20) and the inner sound-absorbing cotton (30) inside the outer shell (10). The lifting components are used to assist in the installation or removal of the outer sound-absorbing cotton (20) and the inner sound-absorbing cotton (30).

2. The quick replacement structure of the sound-absorbing cotton for the screw vacuum pump silencer according to claim 1, characterized in that: The lifting assembly includes multiple inner arc strips (501), the inner arc strips (501) are made of elastic material, the inner arc strips (501) are arc-shaped plates, and a rib plate (503) is fixedly installed between two inner arc strips (501). The rib plate (503) is used to improve the strength of the lifting assembly. Multiple side rods (502) are provided between the inner arc strips (501). The side rods (502) are used to facilitate the assembly of multiple lifting assemblies.

3. The quick replacement structure of the sound-absorbing cotton for the screw vacuum pump silencer according to claim 2, characterized in that: A protruding locking block (504) is fixedly installed on the side rod (502). The protruding locking block (504) is located at both ends of the side rod (502) and is used to be embedded in the fixed insert (60).

4. The quick replacement structure for sound-absorbing cotton in a screw vacuum pump silencer according to claim 2, characterized in that: Two retaining rings (505) are fixedly installed on the side rod (502). The retaining rings (505) are evenly distributed on the side rod (502). Each retaining ring (505) consists of a fixed base and an arc plate. The arc plate is a three-fifths arc. The arc plate in the retaining ring (505) is used to contact the outer wall of the fixed insertion rod (60). The retaining ring (505) is used to restrict the position of the fixed insertion rod (60).

5. The quick replacement structure for sound-absorbing cotton in a screw vacuum pump silencer according to claim 1, characterized in that: The fixed rod (60) includes a pull handle (601) and a slot post (602). The pull handle (601) is used to facilitate the user to pull the fixed rod (60) out of the lifting assembly. The pull handle (601) is fixedly connected to the slot post (602). The slot post (602) is provided with two fixing grooves. The fixing grooves are used to fit with the parts in the lifting assembly. The outer wall of the slot post (602) is cylindrical.

6. The quick replacement structure for sound-absorbing cotton in a screw vacuum pump silencer according to claim 1, characterized in that: The outer sound-absorbing cotton (20), inner sound-absorbing cotton (30), and sound-absorbing cotton body (40) are used for sound absorption. The outer sound-absorbing cotton (20), inner sound-absorbing cotton (30), and sound-absorbing cotton body (40) are made of wave-absorbing material.

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