Gas silencer

Abstract

The utility model discloses a gas silencer, and belongs to the technical field of silencers. The silencer comprises a shell, a connecting assembly, a filtering assembly and a silencing interlayer, the shell comprises an inner cylinder and an outer cylinder which are connected with each other, and a hollow cavity is formed between the inner cylinder and the outer cylinder; the connecting assembly comprises a connecting pipe, the connecting pipe is fixedly connected with the inner cylinder and inserted into the inner cylinder, and the connecting pipe can input high-pressure airflow into the shell; the filtering assembly is inserted into the connecting pipe, the filtering assembly is detachably connected with the connecting pipe, and the filtering assembly can filter high-pressure airflow; and the noise reduction interlayer is arranged in the cavity, and the noise reduction interlayer can weaken noise generated when the airflow passes through the cavity. According to the utility model, gas can be pre-filtered, and the filtering assembly can be replaced in time.

Description

Technical Field

[0001] This utility model relates to the field of silencer technology, and in particular to a gas silencer. Background Technology

[0002] A silencer is a device that blocks the path of sound while allowing airflow to pass through, and is an important measure to eliminate aerodynamic noise. Silencers are devices installed in the airflow channels or intake / exhaust systems of aerodynamic equipment (such as blowers, air compressors, boiler exhaust ports, generators, water pumps, and other equipment with noisy exhaust ports) to reduce noise.

[0003] Existing noise reduction equipment relies on a layer of sound-absorbing material on the inner wall of the pipe to reduce noise. However, dust and debris in the airflow will adhere to the sound-absorbing layer, and the accumulated dust will reduce the noise reduction effect over time. Utility Model Content

[0004] In view of this, it is necessary to provide a gas silencer to solve the problem that existing silencers are prone to clogging after long-term use, which leads to a decrease in noise reduction effect.

[0005] This utility model provides a gas silencer. It includes:

[0006] A housing, the housing comprising an inner cylinder and an outer cylinder connected to each other, with a hollow cavity formed between the inner cylinder and the outer cylinder;

[0007] A connecting assembly, the connecting assembly including a connecting pipe, the connecting pipe being fixedly connected to the inner cylinder and inserted into the inner cylinder, the connecting pipe being capable of inputting high-pressure airflow into the housing;

[0008] A filter assembly is inserted into the connecting pipe, and the filter assembly is detachably connected to the connecting pipe. The filter assembly is capable of filtering the high-pressure airflow.

[0009] A sound-absorbing interlayer is arranged in the cavity, which can reduce the noise of airflow.

[0010] Furthermore, the filter assembly includes a filter frame filled with a filter layer for filtering high-pressure gas; the filter frame is movably inserted into the connecting pipe, and the end of the filter frame away from the inner cylinder is slidably engaged with the connecting pipe.

[0011] Furthermore, the filter frame includes multiple partitions and connecting rods. The multiple partitions are coaxially arranged and maintain the same spacing. The connecting rods are sequentially inserted into the multiple partitions and connected to the partitions. A filling space for filling the filter layer is formed between two adjacent partitions. The end of the connecting rod away from the inner cylinder is slidably engaged with the connecting tube.

[0012] Furthermore, the projection of the partition relative to the inner cylinder is consistent with the size of the inner cavity cross-section of the inner cylinder, and the partition is provided with vent holes.

[0013] Furthermore, the filter frame also includes a snap-fit ​​connector, which is located at the end of the connecting rod away from the inner cylinder. The snap-fit ​​connector is fixedly connected to the connecting rod and slidably snaps into the end of the connecting tube.

[0014] Furthermore, the sound-absorbing interlayer includes a sound-absorbing cylinder body arranged along the circumference of the inner cylinder and a sound-absorbing pad body disposed at the end of the inner cylinder, wherein the sound-absorbing cylinder body and the sound-absorbing pad body abut against each other.

[0015] Furthermore, the sound-absorbing cylinder and the sound-absorbing pad are made of corrugated metal wire.

[0016] Furthermore, the inner cylinder is provided with a plurality of first silencing holes, which are evenly distributed on the inner cylinder.

[0017] Furthermore, the outer cylinder is provided with a plurality of second silencing holes, which are partially distributed on the outer cylinder.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] This utility model discloses a gas silencer equipped with a filter assembly, which is inserted into a connecting pipe. The filter assembly can filter dust and impurities in the high-pressure airflow. The filter assembly is detachably connected to the connecting pipe, allowing for timely removal and replacement of the filter assembly based on its blockage status. This restores the filter assembly's filtration capacity and extends the silencer's service life. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0022] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0023] Figure 3 This is a schematic diagram of the structure of the filter component in this utility model. Figure 1 ;

[0024] Figure 4 This is a schematic diagram of the structure of the filter component in this utility model. Figure 2 ;

[0025] Figure 5 This is a schematic diagram of the structure of the separator in this utility model.

[0026] In the diagram, 100 is the shell; 110 is the inner cylinder; 111 is the first silencing hole; 120 is the outer cylinder; 121 is the second silencing hole; and 130 is the cavity.

[0027] 200. Connecting component; 210. Connecting pipe;

[0028] 300. Filter assembly; 310. Filter frame; 311. Separator; 311a. Vent hole; 312. Connecting rod; 313. Snap-fit ​​connector;

[0029] 400. Silencing interlayer; 410. Silencing cylinder; 420. Silencing pad. Detailed Implementation

[0030] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0031] This embodiment of a gas silencer relates to the field of silencer technology. By providing a detachable gas filter assembly 300 at the air inlet of the silencer, the gas entering the silencer can be pre-treated, impurities in the gas can be filtered, the sound-absorbing layer in the silencer can be prevented from being blocked, and the service life of the silencer can be extended.

[0032] Please see Figures 1 to 5 This embodiment of a gas silencer includes: a housing 100, a connecting assembly 200, a filter assembly 300, and a silencing interlayer 400. The housing 100 provides space and support for the silencing interlayer 400. The connecting assembly 200 can input high-pressure gas into the housing 100, and the filter assembly 300 can filter the high-pressure gas input into the connecting assembly 200. The silencing interlayer 400 can reduce the noise of the airflow.

[0033] The housing 100 includes an inner cylinder 110 and an outer cylinder 120 connected to each other, with a hollow cavity 130 formed between the inner cylinder 110 and the outer cylinder 120. The cavity 130 is used to accommodate the sound-absorbing interlayer 400 and guide the airflow path.

[0034] The connecting assembly 200 includes a connecting pipe 210, which is fixedly connected to the inner cylinder 110. One end of the connecting pipe 210 is inserted into the inner cylinder 110 and extends into the interior of the inner cylinder 110. The other end of the connecting pipe 210 is connected to an external pipeline, which can discharge high-pressure gas into the housing 100 through the connecting pipe.

[0035] The filter assembly 300 is inserted into the connecting pipe 210 and can filter dust and impurities in the high-pressure airflow. The filter assembly 300 is detachably connected to the connecting pipe 210. The filter assembly 300 can be disassembled and reassembled with the connecting pipe 210 according to its own blockage, so as to clear or replace the filter assembly 300 in time, restore the filtering capacity of the filter assembly 300, and extend the service life of the silencer.

[0036] The sound-absorbing interlayer 400 is arranged in the cavity 130. The sound-absorbing interlayer 400 can disperse the sound wave energy of the airflow and reduce noise.

[0037] It should be noted that both the inner cylinder 110 and the outer cylinder 120 are cylindrical structures with one open end and one closed end. The outer cylinder 120 is nested outside the inner cylinder 110, and the cavity 130 is formed between the inner cylinder 110 and the outer cylinder 120. The shell 100 also includes a sealing plate, which is disposed at the open ends of the inner cylinder 110 and the outer cylinder 120. The sealing plate is welded to the open ends of the inner cylinder 110 and the outer cylinder 120 to form a single unit and a relative seal. The middle part of the connecting pipe 210 is welded to the sealing plate and a relative seal is formed.

[0038] In some embodiments, please refer to Figure 3 and Figure 4 The filter assembly 300 includes a filter frame 310, which is filled with a filter layer for filtering high-pressure gas. The filter layer is used to intercept solid impurities in the airflow. The filter frame 310 is movably inserted into the connecting pipe 210, and the end of the filter frame 310 away from the inner cylinder 110 is slidably engaged with the connecting pipe 210. In practical applications, the filter layer refers to a filter medium made of porous material, specifically a sintered metal mesh or a ceramic fiber layer, which intercepts particulate matter in the airflow through its porous structure.

[0039] The filter frame 310 can be inserted entirely into the internal channel of the connecting pipe 210, with its end near the outer cylinder 120 forming a detachable connection with the connecting pipe 210 via a sliding snap-fit ​​structure. When high-pressure airflow enters the inner cylinder 110 through the connecting pipe 210, the filter layer intercepts solid impurities in the airflow, while the rigid structure of the filter frame 310 can withstand the impact force of the airflow. When maintenance is required, the operator can directly pull out the filter frame 310 axially along the connecting pipe 210 to clean or replace the clogged filter layer, and then reinsert it and fix it using the sliding snap-fit, achieving quick maintenance.

[0040] Compared to existing technologies, the filter structure of traditional silencers is usually fixed inside the pipe and cannot be disassembled for cleaning. Over time, the accumulation of impurities can easily clog the airflow channels. This solution, through a combination of movable plug-in and sliding snap-fit ​​connections, makes the filter unit removable, significantly improving the ease of maintenance while ensuring filtration effectiveness.

[0041] In some embodiments, please refer to Figure 3 and Figure 5 The filter frame 310 includes multiple partitions 311 and connecting rods 312. The multiple partitions 311 are coaxially arranged and maintain the same spacing. The connecting rods 312 are sequentially inserted into the multiple partitions 311 and connected to the partitions 311. A filling space for filling the filter layer is formed between two adjacent partitions 311.

[0042] Among them, the separator 311 refers to a coaxially arranged annular sheet structure, which can be made of metal or plastic. It forms a stacked space by maintaining an equidistant distribution, and is used to fix the filling position of the filter layer.

[0043] Among them, the connecting rod 312 refers to the rod-shaped component that passes through multiple partition plates 311. Specifically, it can be fixed to the partition plates 311 by threaded connection or welding, in order to maintain the spacing of the partition plates 311 and the overall structural stability.

[0044] Among them, the sliding snap-fit ​​refers to the detachable connection between the end of the connecting rod 312 and the connecting pipe 210. The connecting pipes 210 can cooperate with each other to achieve quick disassembly and assembly, which facilitates the maintenance and replacement of the filter assembly 300.

[0045] Specifically, multiple separators 311 are arranged at intervals along the axial direction and are connected in series and fixed by connecting rods 312 to form a stable layered frame structure. The filter material filled in the filling space can intercept impurities in the airflow and prevent them from entering the silencer interlayer 400 and causing blockage. The end of the connecting rod 312 is connected to the connecting pipe 210 by a sliding snap-fit ​​structure. When it is necessary to clean or replace the filter layer, the filter frame 310 can be directly pulled out from the connecting pipe 210, avoiding the need to disassemble the entire silencer structure.

[0046] In some embodiments, please refer to Figure 1The projection of the separator 311 relative to the inner cylinder 110 is consistent with the size of the inner cavity cross-section of the inner cylinder 110. This consistency means that the radial dimension of the separator 311 perfectly matches the cross-sectional shape of the internal channel of the inner cylinder 110. Specifically, this can be achieved by machining an annular metal sheet. This structure ensures that the filter layer frame is fixed in its installation position within the channel of the inner cylinder 110. Ventilation holes 311a are formed on the separator 311, which are flow-through pores on the surface of the separator 311. These pores create airflow channels while maintaining structural strength.

[0047] Specifically, by designing the separator 311 to have the same shape as the cross-section of the inner cylinder 110 channel, multiple separators 311 can form a stable support frame when arranged equidistantly along the axial direction. After the filling space formed between each separator 311 is completely filled with filter material, a uniform flow state can be maintained when airflow passes through. The vent holes 311a opened on the separator 311 not only reduce airflow resistance, but also allow the gas to form multi-directional flow when passing through the filter layer, avoiding excessively high flow velocity in local areas that could cause the filter material to be impacted and displaced.

[0048] For specific implementation details, please refer to [link / reference]. Figure 1 and Figure 4 The filter frame 310 also includes a snap-fit ​​connector 313, which is located at the end of the connecting rod 312 away from the inner cylinder 110 and is fixedly connected to the connecting rod 312. Specifically, the snap-fit ​​connector 313 is cross-shaped, with a cross-shaped groove at the end of the connecting tube 210. The four connectors of the snap-fit ​​connector 313 are respectively snapped into the cross-shaped groove, thereby locking the snap-fit ​​connector 313 and the connecting rod 312. This plug-in mating structure of the snap-fit ​​connector 313 and the groove reduces the difficulty of disassembly and assembly during maintenance of the filter assembly 300.

[0049] In some embodiments, please refer to Figure 1 The sound-absorbing interlayer 400 includes a sound-absorbing cylinder 410 arranged circumferentially along the inner cylinder 110 and a sound-absorbing pad 420 arranged at the end of the inner cylinder 110, with the sound-absorbing cylinder 410 and the sound-absorbing pad 420 abutting against each other.

[0050] The silencer cylinder 410 refers to a ring-shaped structure arranged circumferentially around the outer wall of the inner cylinder 110. Specifically, it can be achieved by winding metal wire mesh to form a corrugated structure, which increases the airflow contact area by covering the outer circumferential surface of the inner cylinder 110. The silencer pad 420 refers to a plate-like structure covering the end opening of the inner cylinder 110. Specifically, it can be achieved by winding metal wire mesh to form a corrugated structure, which forms a sound wave reflection interface by closing the end opening. Mutual contact refers to the gapless contact between the silencer cylinder 410 and the silencer pad 420 at the connection point. Specifically, it can be achieved by interference fit or elastic pressing, which prevents sound wave leakage by establishing a continuous silencer interface.

[0051] When the high-pressure airflow passes through the inner cylinder 110, the sound wave energy is first dispersed and absorbed by the corrugated structure of the silencing cylinder 410. When the remaining sound waves are transmitted to the end of the inner cylinder 110, the silencing pad 420 forms a rigid reflective surface that reflects the sound waves back to the silencing cylinder 410 for secondary absorption. The contact structure between the silencing cylinder 410 and the silencing pad 420 forms a continuous silencing channel, preventing the airflow from directly impacting the wall of the outer cylinder 120 and generating secondary noise.

[0052] In some embodiments, please refer to Figure 1 The inner cylinder 110 has a plurality of first silencing holes 111, which are evenly distributed on the inner cylinder 110. This application further proposes a gas silencer, wherein the outer cylinder 120 has a plurality of second silencing holes 121, which are partially distributed on the outer cylinder 120.

[0053] The second silencing hole 121 refers to a through hole structure opened on the surface of the outer cylinder 120. Specifically, it can be processed by an equally spaced ring array or an alternating arrangement to achieve airflow diffusion and sound wave energy dispersion and attenuation.

[0054] The outer cylinder 120, as the external structure of the shell 100, has second silencing holes 121 distributed on its surface to guide airflow through multiple paths between the cavity 130 and the external environment. When high-pressure airflow enters the cavity 130 through the inner cylinder 110, some of the airflow is discharged outward through the second silencing holes 121. During this process, the airflow velocity decreases and the sound wave energy is dispersed, thereby reducing the overall noise level. The second silencing holes 121 are arranged in a partial area to avoid excessive local structural load caused by concentrated airflow passing through specific locations.

[0055] In some specific embodiments, the diameter of the second silencing hole 121 can be set to 2-5 mm, and the hole spacing can be controlled within the range of 3-5 times the hole diameter. The distribution area of ​​the second silencing hole 121 on the surface of the outer cylinder 120 can be selected to avoid the installation position of the connecting pipe 210, for example, in the middle section to the tail end of the outer cylinder 120 in a spiral pattern.

[0056] Multiple second silencing holes 121 are provided on the outer cylinder 120, and the multiple second silencing holes 121 are partially distributed on the outer cylinder 120. The second silencing holes 121 refer to the through-hole structures opened on the wall of the outer cylinder 120, which can be implemented in a way that is evenly distributed or staggered, and are used to guide the airflow to disperse and reduce flow noise.

[0057] Partial layout means that the second silencer hole 121 is arranged only in a specific area of ​​the outer cylinder 120. Specifically, it can be achieved by selecting a local area in the middle section or near the outlet section of the outer cylinder 120, so as to avoid setting holes in the concentrated area of ​​airflow impact and extend the service life of the outer cylinder 120.

[0058] Working process: When the high-pressure airflow enters the housing 100 through the connecting pipe 210, it first passes through the filter assembly 300 inserted in the connecting pipe 210 to intercept impurities. The filtered airflow enters the cavity 130 formed by the inner cylinder 110 and the outer cylinder 120. During the flow through the sound-absorbing interlayer 400, the sound waves are attenuated by multiple reflections within the sound-absorbing interlayer 400. The stable cavity structure formed by the inner cylinder 110 and the outer cylinder 120 prevents the airflow from directly impacting the sound-absorbing material, and the spatial distribution of the cavity 130 helps to extend the airflow path to enhance the sound absorption effect. When cleaning and maintenance are required, the filter assembly 300 can be removed separately from the connecting pipe 210 for cleaning or replacement without disassembling the entire structure of the housing 100.

[0059] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the present utility model.

Claims

1. A gas silencer, characterized in that, include: A housing, the housing comprising an inner cylinder and an outer cylinder connected to each other, with a hollow cavity formed between the inner cylinder and the outer cylinder; A connecting assembly, the connecting assembly including a connecting pipe, the connecting pipe being fixedly connected to the inner cylinder and inserted into the inner cylinder, the connecting pipe being capable of inputting high-pressure airflow into the housing; A filter assembly is inserted into the connecting pipe, and the filter assembly is detachably connected to the connecting pipe. The filter assembly is capable of filtering the high-pressure airflow. A sound-absorbing interlayer is arranged in the cavity, which can reduce the noise of airflow.

2. A gas silencer according to claim 1, characterized in that, The filter assembly includes a filter frame filled with a filter layer for filtering high-pressure gas; the filter frame is movably inserted into the connecting pipe, and the end of the filter frame away from the inner cylinder is slidably engaged with the connecting pipe.

3. A gas silencer according to claim 2, characterized in that, The filter frame includes multiple partitions and connecting rods. The multiple partitions are coaxially arranged and maintain the same spacing. The connecting rods are sequentially inserted into the multiple partitions and connected to the partitions. A filling space for filling the filter layer is formed between two adjacent partitions. The end of the connecting rod away from the inner cylinder is slidably engaged with the connecting tube.

4. A gas silencer according to claim 3, characterized in that, The projection of the partition relative to the inner cylinder is the same as the size of the inner cavity cross-section of the inner cylinder, and the partition is provided with vent holes.

5. A gas silencer according to claim 3, characterized in that, The filter frame also includes a snap-fit ​​connector, which is located at the end of the connecting rod away from the inner cylinder. The snap-fit ​​connector is fixedly connected to the connecting rod and slidably snaps into the end of the connecting tube.

6. A gas silencer according to any one of claims 1-5, characterized in that, The sound-absorbing interlayer includes a sound-absorbing cylinder body arranged along the circumference of the inner cylinder and a sound-absorbing pad body arranged at the end of the inner cylinder, wherein the sound-absorbing cylinder body and the sound-absorbing pad body abut against each other.

7. A gas silencer according to claim 6, characterized in that, The sound-absorbing cylinder and sound-absorbing pad are made of corrugated metal wire.

8. A gas silencer according to claim 1, characterized in that, The inner cylinder has multiple first silencing holes, which are evenly distributed on the inner cylinder.

9. A gas silencer according to claim 1, characterized in that, The outer cylinder is provided with a plurality of second silencing holes, which are partially distributed on the outer cylinder.

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