Gas exhausting, emptying, sound-insulating and sound-reducing box structure

Abstract

The utility model provides a sound insulation and noise reduction box structure for gas emptying, and belongs to the technical field of noise control. Comprising an original emptying pipeline, a sound insulation and elimination box body section and a resistive noise elimination outlet section, the sound insulation and elimination box body section is of a box type structure with an inner cavity, a sound insulation and absorption material layer is arranged on the wall of the inner cavity, the outline of the inner cavity is larger than the outer outline of the original emptying pipeline, and the original emptying pipeline extends into one side of the sound insulation and elimination box body section. The extension direction of the sound insulation and elimination box body section is the same as the direction of an exhaust port end of an original emptying pipeline, the resistive noise elimination outlet section is arranged at at least one end of the sound insulation and elimination box body section in the extension direction, the sound insulation and elimination box body section is communicated with the outside through a resistive noise elimination section outlet, and a resistive noise elimination sheet is arranged at an opening of the resistive noise elimination outlet section in the exhaust direction. And the sound insulation and elimination effects on the emptying pipeline are effectively improved through the composite impedance structure, and it is guaranteed that the noise of the emptying pipeline is reduced to the noise value meeting the requirement.

Description

Technical Field

[0001] The utility model relates to the technical field of noise control, in particular to a gas exhaust and sound insulation box structure. Background Art

[0002] With the development of industrialization, a large amount of noise is often generated in locations such as metallurgical industrial plants, urban commercial complexes, highways, and railways that utilize large-scale machinery and equipment. This is especially true of high-pressure devices such as large blowers, Roots blowers, compressors, and high-pressure steam and gas equipment, which require venting and exhausting for startup or process requirements. Venting high-pressure air causes severe air disturbances, generating transient jet noise. Simultaneously, the exhaust pipes, exhaust valves, and related exhaust devices are excited, generating strong excitation noise. This, combined with the aforementioned exhaust gas jet noise, creates a high-intensity exhaust noise that radiates into the surrounding environment, with average noise levels reaching 80 to 150 dB(A).

[0003] In the relevant technology, the venting silencing means currently used to control venting noise are usually to install ordinary resistive silencers, throttling and pressure-reducing (decompression) type silencers, small-hole injection type exhaust silencers or throttling and pressure-reducing small-hole injection composite silencers, etc.

[0004] The method of installing a vent silencer and a silencer box in the relevant technology can achieve a certain noise reduction and silencing effect, but they only focus on eliminating the gas dynamic noise of the exhaust port, that is, the jet noise, and do not comprehensively consider and eliminate the jet noise, the exhaust pipe and the noise excited by the related exhaust device. As a result, after the exhaust noise is treated, the noise value is still above 80dB(A) or even 100dB(A), which cannot meet the relevant treatment requirements and has a poor sound insulation and silencing effect. Utility Model Content

[0005] The purpose of this utility model is to provide a sound insulation and muffler box structure for gas discharge and exhaust, which effectively improves the sound insulation and muffler effect of the discharge pipe through its composite impedance structure, ensuring that the noise is reduced to a noise level that meets the requirements. The technical solution is as follows:

[0006] The utility model provides a gas discharge and exhaust sound insulation and muffler box structure, comprising: an original discharge pipe, a sound insulation and muffler box section and a resistive muffler outlet section.

[0007] The sound insulation and sound absorption box section is a box-shaped structure with an inner cavity, a sound insulation and absorption material layer is provided on the wall of the inner cavity, the outline of the inner cavity is larger than the outer outline of the original vent pipe, the original vent pipe extends from one side of the sound insulation and sound absorption box section, the extension direction of the sound insulation and sound absorption box section is in the same direction as the discharge end of the original vent pipe, the resistive sound absorption outlet section is provided at at least one end of the sound insulation and sound absorption box section in the extension direction, the sound insulation and sound absorption box section is connected to the outside through the resistive sound absorption outlet section, and a resistive sound absorption sheet is provided at the opening of the resistive sound absorption outlet section along the exhaust direction.

[0008] Optionally, the resistive silencer outlet section is arranged at one end of the sound insulation and silencer box section facing the discharge end of the original vent pipe, and a reactive silencer section is arranged in the inner cavity between the discharge end of the original vent pipe and the resistive silencer outlet section.

[0009] Optionally, the distance between the resistive silencer outlet section and the outlet of the original vent pipe is greater than or equal to 1.5 m.

[0010] Optionally, the resistive silencer outlet section is also provided at one end of the sound-isolating and silencer box section facing away from the discharge end of the original vent pipe.

[0011] Optionally, the resistive silencer outlet section is arranged at an end of the sound insulation and silencer box section facing away from the discharge end of the original vent pipe, and the distance between the resistive silencer outlet section and the discharge end of the original vent pipe is greater than or equal to 1m.

[0012] Optionally, the resistive sound-absorbing outlet section includes a main opening section and a side opening section, the main opening section is arranged along the extension direction of the sound-insulating and sound-absorbing box section, and the side opening section is arranged along a direction perpendicular to the main opening section.

[0013] Optionally, the gas exhaust sound insulation and soundproofing box structure further includes a metal bracket, which is arranged at at least one end of the sound insulation and soundproofing box section in the extension direction, and between the side opening section and the sound insulation and soundproofing box section.

[0014] Optionally, a guide tip structure is provided at one end of the resistive sound-absorbing plate facing the inner cavity.

[0015] Optionally, a small hole injection muffler or a throttling and pressure reducing muffler is provided at the discharge end of the original vent pipe.

[0016] Optionally, the sound insulation and sound absorption material layer includes at least one sound insulation material layer, a damping material layer or a sound absorption material layer.

[0017] The beneficial effects of the technical solution provided by the utility model include at least:

[0018] The gas discharge and exhaust soundproofing box structure is equipped with a soundproofing box section with a certain extension length and an inner cavity according to the end section structure of the original discharge pipe for discharge and exhaust work as needed. The soundproofing box section can be made into a rectangular, cylindrical or other irregular shaped box structure according to the on-site conditions. During installation, a hole can be opened on the side wall of the soundproofing box section to allow the original discharge pipe and valves and other related noise source devices to extend into and be fixedly connected through the vibration isolation sleeve, so that the discharge end of the original discharge pipe and a section of the pipeline after the discharge end are all set in the inner cavity. When the original discharge pipe discharges air from its discharge end to excite noise, its exhaust gas will first enter the inner cavity of the soundproofing box section and flow along the soundproofing box section, and finally be discharged from the resistive silencer outlet section. By setting up a soundproofing and muffler box section with an inner cavity space larger than the outer contour of the original vent pipe, the jet gas disturbance at the outlet end of the original vent pipe is reduced by factors such as the expanded enclosed space and the change in the flow field within the space, and the noise is initially absorbed by the sound-isolating and absorbing material layer on the inner cavity wall, thereby achieving the effects of resistance reduction, pressure equalization, and noise reduction. Furthermore, when the airflow exits the soundproofing and muffler box section from the opening of the resistive muffler outlet section, the porous sacrificial structure of the resistive muffler can be used to further convert the sound energy into heat energy through friction and dissipate it, further attenuating the noise propagating along the soundproofing and muffler box section. The composite impedance structure effectively improves the soundproofing and muffler effect of the vent pipe, ensuring that the noise is reduced to a noise value that meets the requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 This is a front view structural diagram of a gas discharge and sound insulation muffler box structure provided by an embodiment of the utility model;

[0021] Figure 2 yes Figure 1 Side view of the structure of the gas discharge and sound insulation muffler box;

[0022] Figure 3 yes Figure 1 Schematic diagram of the overhead structure of the medium gas discharge and sound insulation muffler box structure;

[0023] Figure 4 This is a front view structural diagram of a second gas discharge and sound insulation muffler box structure provided by an embodiment of the present utility model;

[0024] Figure 5yes Figure 4 Side view of the structure of the gas discharge and sound insulation muffler box;

[0025] Figure 6 This is a front view structural diagram of a third gas discharge and sound insulation muffler box structure provided by an embodiment of the present utility model;

[0026] Figure 7 yes Figure 6 Side view of the structure of the gas discharge and sound insulation muffler box;

[0027] Figure 8 yes Figure 6 Schematic diagram of the overhead structure of the medium gas discharge and sound insulation muffler box structure;

[0028] Figure 9 It is a schematic structural diagram of the resistive sound-absorbing sheet provided in an embodiment of the present utility model.

[0029] In the picture:

[0030] 1-original vent pipe; 2-soundproof and silencer box section; 2a-inner cavity; 3-resistive silencer outlet section; 4-metal bracket; 21-sound insulation and absorption material layer; 22-resistive silencer section; 31-resistive silencer sheet; 32-main opening section; 33-side opening section; 311-guide tip structure. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] Figure 1 This is a front view structural diagram of a gas discharge and sound insulation muffler box structure provided by an embodiment of the utility model; Figure 2 yes Figure 1 Side view of the structure of the gas discharge and sound insulation muffler box; Figure 3 yes Figure 1 Schematic diagram of the overhead structure of the medium gas discharge and sound insulation muffler box structure; Figure 4 This is a front view structural diagram of a second gas discharge and sound insulation muffler box structure provided by an embodiment of the present utility model; Figure 5 yes Figure 4 Side view of the structure of the gas discharge and sound insulation muffler box; Figure 6 This is a front view structural diagram of a third gas discharge and sound insulation muffler box structure provided by an embodiment of the present utility model; Figure 7 yes Figure 6 Side view of the structure of the gas discharge and sound insulation muffler box; Figure 8 yes Figure 6 Schematic diagram of the overhead structure of the medium gas discharge and sound insulation muffler box structure; Figure 9This is a schematic diagram of the structure of the resistive muffler provided by the embodiment of the utility model. Figures 1 to 9 As shown, an embodiment of the utility model provides a gas discharge and exhaust sound insulation and silencer box structure, including an original discharge pipe 1, a sound insulation and silencer box section 2 and a resistive silencer outlet section 3.

[0033] The soundproofing and muffler box section 2 is a box-shaped structure having an inner cavity 2a, and a sound-insulating and sound-absorbing material layer 21 is provided on the wall of the inner cavity 2a. The outline of the inner cavity 2a is larger than the outer outline of the original vent pipe 1. The original vent pipe 1 extends from one side of the soundproofing and muffler box section 2, and the extension direction of the soundproofing and muffler box section 2 is in the same direction as the outlet end of the original vent pipe 1. The resistive muffler outlet section 3 is provided at at least one end of the soundproofing and muffler box section 2 in the extension direction. The soundproofing and muffler box section 2 is connected to the outside through the resistive muffler outlet section 3, and a resistive muffler sheet 31 is provided at the opening of the resistive muffler outlet section 3 along the exhaust direction.

[0034] In the embodiment of the utility model, the gas discharge and exhaust soundproofing box structure is equipped with a soundproofing box section 2 with a certain extension length and an inner cavity 2a, which is provided at the end section structure of the original discharge pipe 1 for discharge and exhaust work as needed. The soundproofing box section 2 can be made into a rectangular, cylindrical or other irregularly shaped box structure according to the on-site conditions. During installation, a hole can be opened on the side wall of the soundproofing box section 2 to allow the original discharge pipe 1 to extend into and be fixedly connected through a vibration isolation sleeve, so that the discharge end of the original discharge pipe 1, the valve and other related noise source devices, and a section of the pipeline after the discharge end are all arranged in the inner cavity 2a. When the original discharge pipe 1 discharges air from its discharge end to excite noise, its exhaust gas will first enter the inner cavity 2a of the soundproofing box section 2 and flow along the soundproofing box section 2, and finally be discharged from the resistive silencer outlet section 3. By providing a soundproofing and muffler section with an inner cavity 2a larger than the outer contour of the original vent pipe 1, the enlarged enclosed space and the altered flow field within this space are utilized to reduce the disturbance of the jet gas at the outlet of the original vent pipe 1. Furthermore, the sound-isolating and absorbing material layer 21 on the wall of the inner cavity 2a provides preliminary noise absorption, achieving the effects of resistance reduction, pressure equalization, and noise reduction. Furthermore, when the airflow exits the soundproofing and muffler section 2 through the opening of the resistive muffler outlet section 3, the porous sacrificial structure of the resistive muffler sheet 31 further converts sound energy into heat energy through friction and dissipates it, further attenuating the noise propagating along the soundproofing and muffler section 2. Its composite impedance structure effectively enhances the soundproofing and muffler effect on the vent pipe, ensuring that its noise is reduced to a desired level. Theoretically, the noise at any outlet can be reduced to the desired level, achieving a high level of noise reduction that is currently unattainable at existing outlets. The noise reduction can be achieved to any value between 5 and 65 dB(A) as required.

[0035] For example, in an embodiment of the present invention, the resistive sound-absorbing sheet 31 can be filled with high-performance sound-absorbing materials that are resistant to high temperature, high humidity, acid and alkali, not easy to shed powder, and not easy to accumulate dust, such as glass fiber yarn, low-carbon steel wire mesh and felt, etc. Micro-perforation, resonance and other sound-absorbing structures can also be used, and the spacing and thickness of the sound-absorbing sheets can be reasonably controlled according to needs to balance the relationship between resistance loss and sound attenuation.

[0036] Optionally, the resistive muffler outlet section 3 is provided at one end of the sound insulation muffler box section 2 facing the outlet end of the original vent pipe 1, and a resistive muffler section 22 is provided in the inner cavity 2a between the outlet end of the original vent pipe 1 and the resistive muffler outlet section 3. Figures 1 to 3 In one implementation of the present invention, the outlet end of the original vent pipe 1 is arranged vertically upward after extending into the soundproof and muffler box section 2, and the corresponding soundproof and muffler box section 2 is arranged in a vertical "chimney" shape. When the density of the exhaust gas is less than or equal to the air density, the resistive muffler outlet section 3 is arranged at the end of the soundproof and muffler box section 2 directly opposite the outlet end of the original vent pipe 1, that is, at the top of the vertical soundproof and muffler box section 2. Furthermore, during the upward discharge from the outlet end of the original vent pipe 1, the exhaust gas passes through the resonance cavity formed by the resistive muffler section 22 and flows upward from the outlet, whose central diameter is smaller than the inner contour of the inner cavity 2a. Before being discharged from the resistive muffler outlet section 3, the exhaust gas absorbs and insulates sound through the expanded space of the soundproof and muffler box section 2, and cooperates with the resistive muffler section 22 to rectify and stabilize the flow, making the airflow smoother and further improving the soundproofing effect.

[0037] Exemplarily, in this embodiment, the resistive silencer section can be designed as a single-section or multi-section resistive silencer section with a large expansion ratio. The spacing between each resistive silencer section 22 can be determined based on factors such as the spectral characteristics of the noise source, the noise elimination frequency band, the gas flow rate and the on-site space, and the minimum distance between the resistive silencer outlet section 3 and the outlet of the original vent pipe 1 shall not be less than 1.5 meters, so that it can fully fill the inner cavity 2a near the resistive silencer outlet section 3 and flow out smoothly and comprehensively from the outlet of the resistive silencer outlet section 3 to ensure the resistive silencer effect.

[0038] Optionally, the end of the sound insulation and muffler box section 2 facing away from the outlet end of the original vent pipe 1 is also provided with a resistive muffler outlet section 3. Figure 4 and Figure 5 On the basis of the previous embodiment, when the density of the exhausted gas is approximately equal to the density of air or a large flow rate is required for emptying, the resistive silencer outlet section 3 can be placed at the top and bottom of the vertically arranged sound insulation and silencer box section 2 at the same time to ensure the emptying flow rate requirement.

[0039] Optionally, the resistive muffler outlet section 3 is arranged at the end of the sound insulation muffler box section facing away from the outlet end of the original vent pipe 1, and the distance between the resistive muffler outlet section 3 and the outlet end of the original vent pipe 1 is greater than or equal to 1m. For example, referring to Figures 6 to 8 In another embodiment of the present invention, when the density of the exhaust gas is greater than that of air, the resistive muffler outlet section 3 is disposed at the end of the soundproof muffler housing section 2 facing away from the outlet end of the original vent pipe 1, that is, at the bottom of the vertically arranged soundproof muffler housing section 2. Air discharged from the outlet end of the original vent pipe 1 rises a certain distance within the soundproof muffler housing section 2 before ultimately returning and being discharged through the resistive muffler outlet section 3 at the bottom. Because the air flows over a relatively long distance within the soundproof muffler housing section 2, it can fully reduce resistance, equalize pressure, and muffle noise within the inner cavity 2a of the soundproof muffler housing section 2. Therefore, there is no need for additional muffler structures such as the resistive muffler section 22, resulting in a simple structure and convenient installation.

[0040] Optionally, the resistive silencer outlet section 3 includes a main opening section 32 and a side opening section 33, wherein the main opening section 32 is arranged along the extension direction of the sound insulation and silencer box section 2, and the side opening section 33 is arranged along a direction perpendicular to the main opening section 32. For example, in an embodiment of the present utility model, in addition to being provided with a main opening section 32 in the same direction as the original vent pipe 1 for discharging air, the resistive silencer outlet section 3 may also be provided with a side opening section 33 perpendicular to the main opening section 32 to provide an additional air discharge channel from the side when the emptying volume is large, thereby ensuring smooth emptying. For example, in an embodiment of the present utility model, four side opening sections 33 are provided in a cross shape on the sides surrounding the main opening section 32, so that the air can be fully discharged from five directions to ensure the emptying flow requirement.

[0041] For example, in the embodiment of the present invention, the overall length of the resistive silencer outlet section 3 is selected between 0 and 5 meters according to the silencer requirements.

[0042] Optionally, the gas exhaust sound insulation and muffler box structure further includes a metal bracket 4, which is disposed at at least one end of the sound insulation and muffler box section 2 in the extension direction, and between the side opening section 33 and the sound insulation and muffler box section 2. For example, in an embodiment of the present invention, the vertically arranged sound insulation and muffler box section 2 is stably supported by metal brackets 4 arranged at intervals along the bottom edge. At the bottom of the side opening section 33, which is arranged in a cross shape and protrudes from the main opening section 32, a metal bracket 4 connected to the outer wall of the sound insulation and muffler box section 2 is also disposed. This improves the mechanical strength of the turning point, prevents deformation and damage caused by exhaust vibration and other factors after long-term operation, and effectively improves the stability of the overall structure.

[0043] Optionally, a guide tip structure 311 is provided at one end of the resistive muffler sheet 31 facing the inner cavity 2a. For example, in an embodiment of the present utility model, the resistive muffler sheet 31 is provided with an angled guide tip structure 311 at a position close to the inner side of the resistive muffler outlet section 3, so as to form an internal and external volume difference at the outlet of the resistive muffler outlet section 3. While achieving the guided discharge of the internal airflow, it facilitates the smooth entry of the airflow from the original vent pipe 1 into the inner cavity airflow channel of the sound insulation and muffler box section 2, thereby improving the exhaust efficiency.

[0044] Optionally, the outlet end of the original vent pipe 1 may be additionally provided with a small-hole injection muffler or other mufflers such as a throttling and decompression muffler. For example, in the embodiment of the present invention, according to the noise reduction requirement of the outlet end, for the outlet end of the high-noise original vent pipe 1, in addition to being covered with the sound insulation and silencer box section 2, a small-hole injection, throttling and decompression muffler may be pre-connected to form a series noise reduction, further improving the noise reduction, and achieving a high noise reduction effect that cannot be achieved by the outlet in the related art.

[0045] Optionally, the sound-insulating and sound-absorbing material layer 21 includes at least one sound-insulating material layer, a damping material layer, or a sound-absorbing material layer. For example, in an embodiment of the present invention, the sound-insulating and damping material layers can be composited from a base material, an inorganic filler, and a metal filler. Base materials include butyl rubber, acrylic rubber, polysulfide rubber, nitrile rubber, silicone rubber, polyurethane, polyvinyl chloride, and epoxy resin, among others. Inorganic fillers include mica, graphite, hollow microspheres, short carbon fibers, glass wool, TiO2, and piezoelectric ceramics, among others. Metal fillers include lead, tin, nickel, copper, zinc, and their alloys. An appropriate proportion of the composite damping material can be selected based on the spectral characteristics of the noise source to maximize the conversion of acoustic energy from noise contacting the cavity wall into heat energy, thereby enhancing noise reduction without affecting the overall thickness and structure of the gas exhaust and soundproofing enclosure. The sound-absorbing material layer can be a rock wool board or a centrifugal glass wool board. Rock wool boards or centrifugal glass wool boards are used as the primary fibrous porous sound-absorbing material to absorb and isolate high- and medium-frequency noise.

[0046] For example, in the embodiment of the present invention, the outer box of the sound insulation and sound absorption box section 2 can be made of metal material as a whole, and the total thickness of the sound insulation and absorption material layer 21 inside it is set in the range of 1.0-500mm.

[0047] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by persons of ordinary skill in the art to which the invention belongs. The terms "first", "second" and similar words used in the patent specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, terms such as "a" or "an" do not indicate a quantitative limitation, but rather indicate the presence of at least one. Terms such as "include" or "comprising" mean that the elements or objects appearing before "include" or "comprising" include the elements or objects listed after "include" or "comprising" and their equivalents, and do not exclude other elements or objects. Terms such as "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Terms such as "upper", "lower", "left", and "right" are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0048] The above description is merely an optional embodiment of the present invention and is not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A gas exhaust sound insulation and muffler box structure, characterized in that: include: The original vent pipe (1), the sound insulation and silencer box section (2) and the resistive silencer outlet section (3), The sound-isolating and sound-absorbing box section (2) is a box-shaped structure having an inner cavity (2a). A sound-isolating and sound-absorbing material layer (21) is provided on the wall of the inner cavity (2a). The outline of the inner cavity (2a) is larger than the outer outline of the original vent pipe (1). The original vent pipe (1) extends from one side of the sound-isolating and sound-absorbing box section (2). The extension direction of the sound-isolating and sound-absorbing box section (2) is in the same direction as the discharge end of the original vent pipe (1). The resistive sound-absorbing outlet section (3) is provided at at least one end of the sound-isolating and sound-absorbing box section (2) in the extension direction. The sound-isolating and sound-absorbing box section (2) is connected to the outside through the resistive sound-absorbing outlet section (3). A resistive sound-absorbing sheet (31) is provided at the opening of the resistive sound-absorbing outlet section (3) along the exhaust direction.

2. The gas exhaust sound insulation and muffler box structure according to claim 1 is characterized in that: The resistive muffler outlet section (3) is arranged at one end of the sound-isolating muffler box section (2) facing the discharge end of the original vent pipe (1), and a reactive muffler section (22) is arranged in the inner cavity (2a) between the discharge end of the original vent pipe (1) and the resistive muffler outlet section (3).

3. The gas exhaust sound insulation and muffler box structure according to claim 2 is characterized in that: The distance between the resistive silencer outlet section (3) and the outlet of the original venting pipe (1) is greater than or equal to 1.5 m.

4. The gas exhaust sound insulation and muffler box structure according to claim 2, characterized in that: The end of the sound-isolating and sound-muffling box section (2) facing away from the discharge end of the original vent pipe (1) is also provided with the resistive sound-muffling outlet section (3).

5. The gas exhaust sound insulation and muffler box structure according to claim 1 is characterized in that: The resistive silencer outlet section (3) is arranged at an end of the sound-isolating silencer box section (2) facing away from the outlet end of the original vent pipe (1), and the distance between the resistive silencer outlet section (3) and the outlet end of the original vent pipe (1) is greater than or equal to 1m.

6. The gas exhaust sound insulation and muffler box structure according to any one of claims 1 to 5, characterized in that: The resistive sound-absorbing outlet section (3) comprises a main opening section (32) and a side opening section (33); the main opening section (32) is arranged along the extension direction of the sound-insulating and sound-absorbing box section (2); and the side opening section (33) is arranged along a direction perpendicular to the main opening section (32).

7. The gas exhaust sound insulation and muffler box structure according to claim 6, characterized in that: The gas exhaust sound insulation and muffler box structure further comprises a metal bracket (4), which is arranged at at least one end of the sound insulation and muffler box section (2) in the extension direction, and between the side opening section (33) and the sound insulation and muffler box section (2).

8. The gas exhaust sound insulation and muffler box structure according to any one of claims 1 to 5, characterized in that: A flow guide tip structure (311) is provided at one end of the resistive sound-absorbing sheet (31) facing the inner cavity (2a).

9. The gas exhaust sound insulation and muffler box structure according to any one of claims 1 to 5, characterized in that: The outlet end of the original vent pipe (1) is provided with a small hole injection muffler or a throttling and pressure reducing muffler.

10. The gas exhaust sound insulation and muffler box structure according to any one of claims 1 to 5, characterized in that: The sound-insulating and sound-absorbing material layer (21) comprises at least one sound-insulating material layer, a damping material layer or a sound-absorbing material layer.

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