A double-skin rectangular panel muffler

Abstract

The utility model relates to rail vehicle muffler technical field discloses a double -deck sheet rectangle muffler's shell, including the inner casing and the outer casing for forming the closed space, the outer casing sleeve sets in the inner casing outside, the inner casing inside installation is used for the processing subassembly of muffling, the inner casing one side lower part is equipped with two clamping components that limit the outer casing. The utility model inner casing and outer casing connection firm, satisfy the rigid demand under the vibration condition, the inside processing subassembly can block the heat outward radiation one aspect, also has good noise reduction effect simultaneously, and the dismounting portable between inner casing and outer casing, the user is convenient to clean the noise reduction heat insulation material that pulverizes in processing subassembly because of high temperature, thereby reduced use cost, when assembling inner casing and outer casing, the clamping component can limit the outer casing, avoid the outer casing movement, provide accurate positioning for subsequent bolt reinforcement, significantly improve assembly efficiency.

Description

Technical Field

[0001] This utility model relates to the field of railway vehicle muffler technology, specifically to the outer shell of a double-layer thin plate rectangular muffler. Background Technology

[0002] A muffler is a device used to reduce airflow noise. It is usually installed in a power system or exhaust system. Its core function is to weaken the noise generated by airflow vibration through sound-absorbing materials or acoustic structures, while also taking into account the heat insulation function. In applications with frequent vibration, such as rail vehicles, the muffler needs to have high impact resistance, stable connection and long-term heat insulation and noise reduction capabilities to avoid structural failure or performance degradation caused by vibration.

[0003] Traditional rectangular mufflers often employ discontinuous, independent internal support frames, which fail to effectively suppress relative displacement between the inner and outer shells. This leads to a decrease in overall rigidity under prolonged vibration. Furthermore, the internal insulation material in existing mufflers is prone to detachment due to adhesive failure in high-temperature, vibrating environments, creating cavities and requiring frequent maintenance. However, most existing mufflers use welded structures to seal the insulation material on the outside, making it inconvenient for users to maintain or replace the internal insulation. Therefore, those skilled in the art provide a double-layer thin-plate rectangular muffler shell to address the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this utility model is to provide a housing for a double-layer thin-plate rectangular silencer, thereby solving the problems mentioned in the background art above.

[0005] This utility model provides the following technical solution: a shell of a double-layer thin plate rectangular silencer, including an inner shell and an outer shell for forming a sealed space, the outer shell being sleeved on the outside of the inner shell, a sound-absorbing processing component being installed inside the inner shell, and two snap-fit ​​components for limiting the outer shell being installed on one side of the inner shell near the bottom.

[0006] As a preferred embodiment of the above technical solution, the processing component includes a horizontal frame and a side frame, and two horizontal frames and two side frames are provided. The two horizontal frames are fixedly connected to one side of the inner wall of the inner shell and are arranged symmetrically. The two side frames are fixedly connected to one side of the inner wall of the inner shell and are fixedly connected between the two horizontal frames, and the two side frames are arranged symmetrically.

[0007] As a preferred embodiment of the above technical solution, both sides of the two transverse frames are fixedly connected to support frames, and the two support frames are respectively fixedly connected to both sides of the two side frames. The inner walls of the two support frames are fixedly connected to longitudinal square tube frames, and the inner walls of the two transverse frames are fixedly connected to transverse square tube frames.

[0008] As a preferred embodiment of the above technical solution, both sides of the two side frames are provided with outer end caps, and the two outer end caps are fixedly connected between the inner shell and the outer shell by bolts. The inner walls of the two outer end caps are fixedly connected with side square tube frames. The inner walls of the two longitudinal square tube frames, the two transverse square tube frames and the two side tube frames are provided with multiple heat insulation and noise reduction pads. An air intake pipe is provided at the upper part of one side of the outer shell. The air intake pipe passes through the outer shell and one of the outer end caps and connects to the interior of the inner shell. An exhaust pipe is provided at the lower part of the other side of the outer shell. The exhaust pipe passes through the outer shell and the other outer end cap and connects to the interior of the inner shell.

[0009] As a preferred embodiment of the above technical solution, the snap-fit ​​assembly includes a slot and a fixing block. The slot is located on the lower part of the inner wall of one side of the outer shell, and the fixing block is fixedly connected to the lower part of one side of the inner shell. The fixing block has a toggle groove, and multiple springs are fixedly connected to the inner wall of the toggle groove.

[0010] As a preferred embodiment of the above technical solution, a movable block is slidably connected to the inner wall of the actuating groove, the movable block is fixedly connected to the front end of a plurality of springs, a wedge-shaped locking block is fixedly connected to the end of the movable block away from the spring, one end of the wedge-shaped locking block penetrates through one side of the actuating groove, and the wedge-shaped locking block and the locking groove are engaged and locked together, an actuating block is slidably connected inside the groove of the actuating groove, and one end of the actuating block is fixedly connected to one side wall of the movable block.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. The outer shell of this double-layer thin-plate rectangular silencer ensures a firm connection between the inner and outer shells, meeting the rigidity requirements under vibration conditions. The treatment components not only prevent heat radiation from the inside of the silencer outward but also effectively intercept and absorb noise propagation, thus reducing noise. Furthermore, the inner and outer shells are easy to disassemble and carry, facilitating the user's cleaning of the noise-reducing and heat-insulating materials that have powdered due to high temperatures within the treatment components, thereby reducing operating costs.

[0013] 2. When assembling the inner shell and outer shell, after the outer shell is completely fitted over the inner shell, the snap-fit ​​assembly can limit the movement of the outer shell, ensuring structural stability under vibration conditions and providing precise positioning for subsequent bolt reinforcement, thus significantly improving assembly efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of the outer shell of a double-layer thin-plate rectangular silencer;

[0015] Figure 2Another perspective schematic diagram of the main structure of the outer shell of a double-layer thin-plate rectangular silencer;

[0016] Figure 3 A structurally exploded view of the processing components of a double-layer thin-plate rectangular muffler housing;

[0017] Figure 4 A schematic diagram of the exhaust pipe and side pipe frame structure of a double-layer thin-plate rectangular muffler shell;

[0018] Figure 5 This is a schematic diagram of the snap-fit ​​assembly structure of the outer shell of a double-layer thin-plate rectangular muffler.

[0019] 1. Inner shell; 2. Outer shell; 3. Processing components; 301. Transverse frame; 302. Side frame; 303. Support frame; 304. Longitudinal square tube frame; 305. Transverse square tube frame; 306. Outer end cap; 307. Side square tube frame; 308. Heat insulation and noise reduction pad; 309. Intake pipe; 310. Exhaust pipe; 4. Snap-fit ​​components; 401. Slot; 402. Fixing block; 403. Actuating slot; 404. Spring; 405. Moving block; 406. Wedge-shaped locking block; 407. Actuating block. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0021] Please see Figures 1-5 The present invention provides a technical solution: a double-layer thin plate rectangular silencer shell, including an inner shell 1 for forming a sealed space and an outer shell 2, the outer shell 2 being sleeved on the outside of the inner shell 1, a sound-absorbing processing component 3 being installed inside the inner shell 1, and two snap-fit ​​components 4 for limiting the outer shell 2 being installed on one side of the inner shell 1 near the bottom.

[0022] Furthermore, the outer shell of this double-layer thin-plate rectangular silencer not only ensures a firm connection between the inner shell 1 and the outer shell 2, meeting the rigidity requirements under vibration conditions, but also, on the one hand, the treatment component 3 effectively blocks the outward radiation of heat from inside the silencer, and on the other hand, it effectively intercepts and absorbs the outward propagation of noise, thus reducing noise. Moreover, the inner shell 1 and the outer shell 2 are easy to disassemble and carry, making it convenient for users to clean the noise-reducing and heat-insulating material in the treatment component 3 that has been powdered due to high temperature, thereby reducing the cost of use. When assembling the inner shell 1 and the outer shell 2, after the outer shell 2 is completely fitted over the inner shell 1, the snap-fit ​​component 4 can limit the outer shell 2 to prevent it from moving, ensuring structural stability under vibration conditions and providing precise positioning for subsequent bolt reinforcement, significantly improving assembly efficiency.

[0023] As one implementation method in this embodiment, please refer to Figures 3-4 As shown, the processing component 3 includes a horizontal frame 301 and a side frame 302. There are two horizontal frames 301 and two side frames 302. The two horizontal frames 301 are fixedly connected to one side of the inner wall of the inner shell 1 and are arranged symmetrically. The two side frames 302 are fixedly connected to one side of the inner wall of the inner shell 1 and are fixedly connected between the two horizontal frames 301. The two side frames 302 are also arranged symmetrically.

[0024] Furthermore, the transverse frame 301 and the side frame 302 adopt a symmetrical double structure design to form a rigid skeleton, which not only enhances the overall structural strength of the inner shell 1, but also effectively disperses vibration stress. At the same time, its symmetrical layout guides the orderly flow of airflow and avoids secondary noise generated by turbulence.

[0025] As one implementation method in this embodiment, please refer to Figures 3-4 As shown, support frames 303 are fixedly connected to both sides of the two transverse frames 301, and the two support frames 303 are fixedly connected to both sides of the two side frames 302 respectively. The inner walls of the two support frames 303 are fixedly connected to the longitudinal square tube frames 304, and the inner walls of the two transverse frames 301 are fixedly connected to the transverse square tube frames 305.

[0026] Both sides of the two side frames 302 are provided with outer end caps 306. The two outer end caps 306 are fixedly connected between the inner shell 1 and the outer shell 2 by bolts. The inner walls of the two outer end caps 306 are fixedly connected with side square tube frames 307. The inner walls of the two longitudinal square tube frames 304, the two transverse square tube frames 305 and the two side tube frames 307 are provided with multiple heat insulation and noise reduction pads 308. An air inlet pipe 309 is provided on the upper side of one side of the outer shell 2. The air inlet pipe 309 passes through the outer shell 2 and one of the outer end caps 306 and connects to the inside of the inner shell 1. An exhaust pipe 310 is provided on the lower side of the other side of the outer shell 2. The exhaust pipe 310 passes through the outer shell 2 and the other outer end cap 306 and connects to the inside of the inner shell 1.

[0027] Furthermore, the nested design of the longitudinal square tube frame 304 and the transverse square tube frame 305 provides a uniform support surface for the heat insulation and noise reduction pad 308, effectively blocking heat conduction and absorbing noise energy. The cooperation between the outer end cap 306 and the side square tube frame 307 forms a double sealing structure. Combined with the staggered layout of the air inlet pipe 309 and the exhaust pipe 310, it not only optimizes the airflow path and reduces turbulent noise, but also ensures the long-term reliable operation of the equipment under vibration conditions, achieving a highly efficient unity of mechanical strength, thermal sound insulation performance and airflow organization.

[0028] As one implementation method in this embodiment, please refer to Figure 5As shown, the snap-fit ​​assembly 4 includes a snap-fit ​​groove 401 and a fixing block 402. The snap-fit ​​groove 401 is opened on the lower part of the inner wall of one side of the outer shell 2. The fixing block 402 is fixedly connected to the lower part of one side of the inner shell 1. The fixing block 402 is provided with a toggle groove 403. Multiple springs 404 are fixedly connected to the inner wall of the toggle groove 403.

[0029] A movable block 405 is slidably connected to the inner wall of the actuating groove 403. The movable block 405 is fixedly connected to the front end of multiple springs 404. A wedge-shaped locking block 406 is fixedly connected to the end of the movable block 405 away from the springs 404. One end of the wedge-shaped locking block 406 passes through one side of the actuating groove 403, and the wedge-shaped locking block 406 and the locking groove 401 are engaged. An actuating block 407 is slidably connected inside the groove of the actuating groove 403. One end of the actuating block 407 is fixedly connected to one side wall of the movable block 405.

[0030] Further, the outer shell 2 is slowly inserted into the inner shell 1 from top to bottom. The lower end of the outer shell 2 will contact the inclined surface of the wedge-shaped locking block 406. The inclined surface of the wedge-shaped locking block 406 decomposes the thrust, causing the spring 404 to contract. The wedge-shaped locking block 406 temporarily contracts into the actuating groove 403. When the groove 401 of the outer shell 2 is aligned with the wedge-shaped locking block 406, the spring 404 returns to its original position, and the wedge-shaped locking block 406 automatically engages with the groove 401. The tension of the spring 404 provides initial fixation, preventing the outer shell 2 from shifting. This ensures structural stability under vibration conditions and provides precise positioning for subsequent bolt reinforcement, significantly improving assembly efficiency. When the device needs internal maintenance after long-term use, the bolts are first removed, then the actuating block 407 is pushed to move the wedge-shaped locking block 406 out of the slot 401, and then the outer shell 2 is pushed up. This makes disassembly between the inner shell 1 and the outer shell 2 convenient and easy for users to clean and handle the heat insulation and noise reduction pad 308 in the component 3 that has been powdered due to high temperature, thereby reducing the cost of use.

[0031] Working principle: Two transverse frames 301 are symmetrically welded to one side of the inner wall of the inner shell 1. Side frames 302 are welded between the transverse frames 301 to form the basic structure. A support frame 303 is welded at the connection between the transverse frames 301 and the side frames 302, completing the main skeleton construction. A longitudinal square tube frame 304 is inserted into the inner wall of the support frame 303. A transverse square tube frame 305 is embedded in the transverse frame 301 and fixed by welding. Side square tube frames 307 are welded to the inner wall of the outer end cap 306. Then, the outer end cap 306 is placed on both sides of the side frames 302 inside the inner shell 1. At this point, the outer shell 2 is slowly inserted into the inner shell 1 from top to bottom. The lower end of the outer casing 2 contacts the inclined surface of the wedge-shaped locking block 406. The inclined surface of the wedge-shaped locking block 406 decomposes the thrust, causing the spring 404 to contract. The wedge-shaped locking block 406 temporarily contracts into the actuating groove 403. When the groove 401 of the outer casing 2 is aligned with the wedge-shaped locking block 406, the spring 404 returns to its original position, and the wedge-shaped locking block 406 automatically engages with the groove 401. The tension of the spring 404 provides initial fixation to prevent the outer casing 2 from shifting. Subsequently, the user screws the bolts into the outer casing 2. The bolts located on one side of the locking assembly 4 pass through the outer casing 2 and the inner casing 1 in sequence and are threaded onto one side of the outer end cap 306. The bolts on the other side pass through the outer casing 2. It is threaded to the other side of the outer end cap 306, thereby fixing the outer end cap 306, the outer shell 2 and the inner shell 1, ensuring a firm connection between the inner shell 1 and the outer shell 2, and meeting the rigidity requirements under vibration conditions. It is composed of a three-dimensional mesh support structure formed by the transverse frame 301, side frame 302, support frame 303, longitudinal square tube frame 304, transverse square tube frame 305, outer end cap 306 and side square tube frame 307, filled internally with a heat insulation and noise reduction pad 308. When sound waves enter the interior through the air inlet pipe 309, they encounter the structure formed by the longitudinal square tube frame 304, transverse square tube frame 305 and side square tube frame 307. The cross structure reflects and scatters the airflow, which is absorbed by the porous material of the heat insulation and noise reduction pad 308 and converted into heat energy to achieve noise reduction. The symmetrical layout of the internal structure guides the airflow along a preset path to avoid secondary noise caused by turbulence, resulting in better noise reduction and heat insulation. When the device needs to be inspected and maintained after long-term use, the bolts are first removed, and then the toggle block 407 is pushed to move the wedge-shaped block 406 out of the slot 401. Then the outer shell 2 is pushed up, making it easy to disassemble and carry between the inner shell 1 and the outer shell 2. This makes it convenient for users to clean and handle the heat insulation and noise reduction pad 308 in the component 3 that has been powdered due to high temperature, thereby reducing the cost of use.

[0032] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A housing for a double-layer thin-plate rectangular silencer, comprising an inner housing (1) for forming a sealed space and an outer housing (2), characterized in that: The outer shell (2) is fitted over the inner shell (1). The inner shell (1) is equipped with a noise reduction processing component (3). Two snap-fit ​​components (4) for limiting the outer shell (2) are installed on one side of the inner shell (1) near the bottom.

2. The housing of a double-layer thin-plate rectangular silencer according to claim 1, characterized in that: The processing component (3) includes a transverse frame (301) and a side frame (302). There are two transverse frames (301) and two side frames (302). The two transverse frames (301) are fixedly connected to one side of the inner wall of the inner shell (1) and are arranged symmetrically. The two side frames (302) are fixedly connected to one side of the inner wall of the inner shell (1) and are fixedly connected between the two transverse frames (301) and are arranged symmetrically.

3. The outer shell of a double-layer thin-plate rectangular silencer according to claim 2, characterized in that: Both sides of the two transverse frames (301) are fixedly connected to support frames (303), and the two support frames (303) are fixedly connected to both sides of the two side frames (302). The inner walls of the two support frames (303) are fixedly connected to longitudinal square tube frames (304), and the inner walls of the two transverse frames (301) are fixedly connected to transverse square tube frames (305).

4. The housing of a double-layer thin-plate rectangular silencer according to claim 3, characterized in that: Both sides of the two side frames (302) are provided with outer end caps (306). The two outer end caps (306) are fixedly connected between the inner shell (1) and the outer shell (2) by bolts. The inner walls of the two outer end caps (306) are fixedly connected with side square tube frames (307). The inner walls of the two longitudinal square tube frames (304), the two transverse square tube frames (305) and the two side square tube frames (307) are provided with multiple heat insulation and noise reduction pads (308). An air inlet pipe (309) is provided on the upper side of one side of the outer shell (2). The air inlet pipe (309) passes through the outer shell (2) and one of the outer end caps (306) and connects to the interior of the inner shell (1). An exhaust pipe (310) is provided on the lower side of the other side of the outer shell (2). The exhaust pipe (310) passes through the outer shell (2) and the other outer end cap (306) and connects to the interior of the inner shell (1).

5. The housing of a double-layer thin-plate rectangular silencer according to claim 1, characterized in that: The snap-fit ​​assembly (4) includes a slot (401) and a fixing block (402). The slot (401) is located on the lower part of the inner wall of the outer shell (2). The fixing block (402) is fixedly connected to the lower part of the inner shell (1). The fixing block (402) has a toggle groove (403) inside. Multiple springs (404) are fixedly connected to the inner wall of the toggle groove (403).

6. The housing of a double-layer thin-plate rectangular silencer according to claim 5, characterized in that: A movable block (405) is slidably connected to the inner wall of the actuating groove (403). The movable block (405) is fixedly connected to the front end of a plurality of springs (404). A wedge-shaped locking block (406) is fixedly connected to the end of the movable block (405) away from the springs (404). One end of the wedge-shaped locking block (406) passes through one side of the actuating groove (403), and the wedge-shaped locking block (406) and the locking groove (401) are engaged. An actuating block (407) is slidably connected inside the groove of the actuating groove (403). One end of the actuating block (407) is fixedly connected to one side wall of the movable block (405).

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