A multi-layer microporous structure of engine muffler

Abstract

The present invention relates to the technical field of engine mufflers, and specifically to a multi-layer microporous structure of an engine muffler, comprising a shell, the inner wall of the shell is provided with a plurality of microporous partitions, a filling layer is provided between every two of the microporous partitions, a baffle is installed on the right side of the shell, the inner wall of the shell is provided with a plurality of mounting grooves, the inner wall of the mounting groove is plugged with a plug-in block, the left side of the plug-in block is plugged with a mounting plate, and the left side of the mounting plate is installed with two rubber plug-ins; the beneficial effect is: by pulling the plug-in rod, the operator can easily separate the baffle from the shell, thereby simplifying the disassembly and assembly process, and facilitating the maintenance of the microporous partitions and the filling layer, in addition, the number of layers of the microporous partitions can be adjusted according to needs, and the plug-in rod can resist the card block after being reset, thereby ensuring the stability of the baffle installation, and at the same time, the sealing ring is used to further improve the sealing between the two, thereby improving the use effect and applicability of the engine muffler.

Description

Technical Field

[0001] The invention relates to the technical field of engine mufflers, in particular to a multi-layer microporous structure of an engine muffler. Background Art

[0002] The engine muffler is an indispensable component in modern internal combustion engine vehicles. Its main function is to reduce the noise generated by the exhaust system and control the emission of exhaust gas. Its engine muffler usually includes microporous baffles and sound-absorbing filling materials. These components work together to eliminate the sound generated from the exhaust system.

[0003] In the prior art, conventional engine mufflers usually use welding to fix microporous baffles in a metal shell, and fill sound-absorbing materials between every two microporous baffles to improve the sound-absorbing effect. However, when maintenance or replacement is required, the baffles are fixed to the shell by bolts, while the microporous baffles are welded to the inner wall of the metal shell, which makes it more complicated for operators to remove the baffles and inconvenient to maintain the microporous baffles and sound-absorbing materials inside, thereby increasing the difficulty of maintenance and affecting the use effect of the engine muffler.

[0004] Therefore, a multi-layer microporous structure of an engine muffler is needed to solve the problem that the existing engine muffler has a complicated disassembly process during maintenance, which makes it inconvenient for operators to maintain. Summary of the invention

[0005] The object of the present invention is to provide a multi-layer microporous structure of an engine muffler to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multi-layer microporous structure of an engine muffler, comprising a shell, the inner wall of the shell is provided with a plurality of microporous partitions, a filling layer is provided between every two of the microporous partitions, a baffle is installed on the right side of the shell, the inner wall of the shell is provided with a plurality of mounting grooves, the inner wall of the mounting groove is plugged with a plug-in block, the left side of the plug-in block is plugged with a mounting plate, two rubber plug-ins are installed on the left side of the mounting plate, the inner wall of the shell is provided with a plurality of plug-in grooves, the rubber plug-in block is plugged into the inner wall of the plug-in groove, the right sides of the plurality of plug-in blocks are all installed on the left side of the baffle, the side of the plurality of plug-in blocks away from the shell is provided with a slide groove, the inner wall of the slide groove is slidably connected with a plurality of T-shaped sliders, two clamps are installed on the outer side of the mounting plate, two card slots are provided on the left side of the plug-in block, the side of the plurality of T-shaped sliders away from the shell is installed between the microporous partitions, the clamp is plugged into the inner wall of the card slot, and the mounting plate passes through the left side of the slide groove.

[0007] Preferably, a plurality of buckle grooves are provided on the right side of the baffle plate, a plug-in rod is inserted into the inner wall of the buckle groove, two rubber frames are installed on the outer side of the right part of the plug-in rod, a movable groove is provided on the right side of the plug-in block, a clamping block is installed on the left side of the movable groove, an arc groove is provided on the right side of the inner wall of the installation groove, a rubber ring is installed on the inner wall of the arc groove, a sealing ring is installed on the left side of the baffle plate, and a clamping groove is provided on the right side of the shell.

[0008] Preferably, the plug rod passes through the buckle slot, and the left side of the plug rod is plugged into the inner wall of the movable slot, the left side of the plug rod is fitted with the block, and the outer side of the rubber frame is fitted with the inner wall of the buckle slot.

[0009] Preferably, the card block passes through the movable groove, and the sides of the multiple card blocks away from the plug-in rod are inserted into the inner wall of the arc groove, the sides of the multiple card blocks away from the plug-in rod are fitted between the rubber ring and squeeze the rubber ring, and the sealing ring is inserted into the inner wall of the card groove.

[0010] Preferably, a rubber plate is installed on one side of the plurality of plug-in blocks away from the housing, and a plurality of fitting grooves are formed on one side of the plurality of rubber plates away from the plug-in blocks.

[0011] Preferably, the sides of the plurality of fitting grooves away from the plug-in block are all fitted to the outer side of the microporous partition.

[0012] Preferably, the rubber plate is sleeved on the outer side of the T-shaped slider and fits closely with the T-shaped slider.

[0013] Preferably, the plurality of plug-in blocks are centrally symmetrically arranged with the shell as the center, and the rubber plug-in block is in an extruded deformation state when plugged into the inner wall of the plug-in slot.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The multi-layer microporous structure of the engine muffler proposed in the present invention allows the operator to easily separate the baffle from the shell by pulling the plug-in rod, thereby simplifying the disassembly and assembly process and facilitating the maintenance of the microporous partition and the filling layer. In addition, the number of layers of the microporous partition can be adjusted as needed, and the plug-in rod can resist the block after being reset, thereby ensuring the stability of the baffle installation. At the same time, the sealing ring is used to further improve the sealing between the two, thereby improving the use effect and applicability of the engine muffler. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a stereogram of the present invention;

[0017] Figure 2 It is a right side view of the present invention;

[0018] Figure 3 for Figure 2Structural cross-section at AA in the middle;

[0019] Figure 4 This is a schematic diagram of the sealing ring structure of the present invention;

[0020] Figure 5 This is a schematic diagram of the baffle structure of the present invention;

[0021] Figure 6 This is a schematic diagram of the inner wall structure of the housing of the present invention;

[0022] Figure 7 for Figure 6 A magnified view of the structure at C in the middle;

[0023] Figure 8 for Figure 2 Structural cross-section at the middle BB;

[0024] Fig. 9 for Figure 8 A magnified view of the structure at D in the middle;

[0025] Fig.10 This is a schematic diagram of the structure of the rubber plug of the present invention;

[0026] Fig.11 It is a front view of the plug-in block of the present invention;

[0027] Fig.12 for Fig.11 Structural cross-section at EE;

[0028] Fig.13 It is a schematic diagram of the structure of the plug-in rod of the present invention;

[0029] Fig.14 This is a schematic diagram of the structure of the chuck of the present invention;

[0030] Fig.15 It is a schematic diagram of the structure of the rubber sheet of the present invention.

[0031] In the figure: 1. shell; 2. baffle; 3. plug-in block; 4. microporous partition; 5. filling layer; 6. plug-in rod; 7. sealing ring; 8. mounting groove; 9. arc groove; 10. snap-in groove; 11. plug-in groove; 12. slide groove; 13. T-shaped slider; 14. rubber ring; 15. clamping block; 16. rubber frame; 17. buckle groove; 18. mounting plate; 19. rubber plug-in block; 20. movable groove; 21. clamping head; 22. clamping groove; 23. rubber plate; 24. fitting groove. DETAILED DESCRIPTION

[0032] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example 1: Please refer to Figures 1 to 15 The present invention provides a technical solution: a multi-layer microporous structure of an engine muffler, comprising a shell 1, a plurality of microporous partitions 4 are arranged on the inner wall of the shell 1, the aperture of the microporous partitions 4 gradually decreases from left to right, a filling layer 5 is arranged between every two microporous partitions 4, a baffle 2 is installed on the right side of the shell 1, a plurality of mounting grooves 8 are opened on the inner wall of the shell 1, a plug-in block 3 is plugged into the inner wall of the mounting groove 8, a mounting plate 18 is plugged into the left side of the plug-in block 3, and two rubber A rubber plug-in block 19 is provided with a plurality of plug-in grooves 11 on the left side of the inner wall of the shell 1. The rubber plug-in block 19 is plugged into the inner wall of the plug-in groove 11. The right sides of the plurality of plug-in blocks 3 are all installed on the left side of the baffle 2. The plurality of plug-in blocks 3 are centrally symmetrically arranged with the shell 1 as the center of the circle. When the rubber plug-in block 19 is plugged into the inner wall of the plug-in groove 11, it is in an extruded deformation state. Thus, by utilizing the rubber plug-in block 19, after the plug-in block 3 is installed, the firmness of the installation between it and the shell 1 is improved, thereby improving the stability of the baffle 2 after installation.

[0034] When maintenance is required, first pull the baffle 2 to the right, and drive the four plug-in blocks 3 to slide to the right along the inner wall of the installation groove 8, and at the same time let the rubber plug-in block 19 gradually detach from the inner wall of the plug-in groove 11, so as to facilitate the operator to separate the shell 1 and the baffle 2, and then the operator maintains the microporous partition 4 and the filling layer 5, and adjusts them according to needs, so that the operator does not need to use tools to perform maintenance, and at the same time improves the efficiency of maintenance. After the maintenance is completed, the operator inserts the plug-in block 3 to the left along the inner wall of the installation groove 8, and drives the microporous partition 4 and the filling layer 5 between the four plug-in blocks 3 to move synchronously toward the inner wall of the shell 1. When it moves to a certain position, the left side of the rubber plug-in block 19 will first contact the inner wall of the plug-in groove 11, and as the plug-in block 3 moves to the left, it will gradually plug into the plug-in groove 11, and at the same time be in an extruded deformation state, thereby increasing the firmness of the installation between the plug-in block 3 and the shell 1, and indirectly increasing the stability of the installation between the baffle 2 and the shell 1.

[0035] Embodiment 2: On the basis of embodiment 1, in order to realize the installation between the baffle 2 and the shell 1 and improve the stability of the baffle 2 after installation, a plurality of buckle grooves 17 are provided on the right side of the baffle 2, and a plug-in rod 6 is inserted into the inner wall of the buckle groove 17, and two rubber frames 16 are installed on the right outer side of the plug-in rod 6, a movable groove 20 is provided on the right side of the plug-in block 3, and a clamping block 15 is installed on the left side of the movable groove 20, an arc groove 9 is provided on the right side of the inner wall of the installation groove 8, and a rubber ring 14 is installed on the inner wall of the arc groove 9, a sealing ring 7 is installed on the left side of the baffle 2, and a clamping groove 10 is provided on the right side of the shell 1; the plug-in rod 6 passes through the buckle groove 17, and the left side of the plug-in rod 6 is inserted into the inner wall of the movable groove 20, the left side of the plug-in rod 6 is fitted with the clamping block 15, and the outer side of the rubber frame 16 is fitted with the inner wall of the buckle groove 17, and the plug-in rod 6 is inserted into the inner wall of the movable groove 20. When resetting to the left, let its left side abut against the card block 15 and be inserted into the inner wall of the arc groove 9, and squeeze one side of the rubber ring 14 to make it in an extruded deformation state; the card block 15 passes through the movable groove 20, and the sides of multiple card blocks 15 away from the plug-in rod 6 are all inserted into the inner wall of the arc groove 9, and the sides of multiple card blocks 15 away from the plug-in rod 6 are all fitted with the rubber ring 14 and squeeze the rubber ring 14. When the plug-in rod 6 is pulled out to the right, the elastic force of the rubber ring 14 itself is used to drive the card block 15 to be flush with the movable groove 20, so as to pull the baffle 2 to the right, separate the microporous partition plate 4 and the filling layer 5 from the shell 1, and the sealing ring 7 is inserted into the inner wall of the card groove 10, so that the cooperation between the sealing ring 7 and the card block 15 increases the firmness of the installation between the baffle 2 and the shell 1, and also improves the sealing performance of the installation between the two.

[0036] When removing the baffle 2, the operator first holds the plug-in rod 6 on the inner wall of the buckle groove 17 and slides it to the right, and allows the two rubber frames 16 on the right side to separate from the sealing ring 7. At this time, the left side of the plug-in rod 6 will slide to the right along the inner wall of the movable groove 20 and gradually move away from the block 15. Since the inner wall of the arc groove 9 is installed with a rubber ring 14, and the rubber ring 14 is in an extruded state, the elastic force of the rubber ring 14 itself can be used to push the block 15 to move and separate from the arc groove 9, while allowing it to reset to the inner wall of the movable groove 20. At this time, the baffle 2 can be pulled to the right, and the rubber plug block 19 can be driven to gradually separate from the plug-in groove 11, so that the operator can easily pull out the baffle 2 for maintenance of the microporous partition 4 and the filling layer 5. After that, the operator plugs the plug-in block 3 into the inner wall of the installation groove 8, and at the same time drives the baffle 2 to reset to the left, and pushes the sealing ring 7 to be plugged into the inner wall of the rubber ring 14. At this time, the rubber plug-in block 19 is plugged into the inner wall of the plug-in groove 11 and is squeezed and deformed. At the same time, the operator plugs the plug-in rod 6 into the inner wall of the sealing ring 7, and lets its left side slide along the inner wall of the movable groove 20 while resisting the block 15 to be plugged into the inner wall of the arc groove 9 and squeezing the rubber ring 14. Then the operator completely inserts the plug-in rod 6, and lets the two rubber frames 16 on the right side fit with the inner wall of the buckle groove 17 to increase the friction between the two, thereby improving the stability of the installation between the baffle 2 and the shell 1, and at the same time improving the sealing between the two.

[0037] Embodiment 3: On the basis of embodiment 2, in order to facilitate users to adjust the microporous partition 4 according to different usage requirements, a plurality of plug-in blocks 3 are provided with a slide groove 12 on the side away from the shell 1, and a plurality of T-shaped sliders 13 are slidably connected to the inner wall of the slide groove 12, two clamping heads 21 are installed on the outer side of the mounting plate 18, and two clamping grooves 22 are provided on the left side of the plug-in block 3; a plurality of T-shaped sliders 13 are installed between the microporous partition 4 on the side away from the shell 1, and the T-shaped sliders 13 penetrate the rubber plate 23. When moving the microporous partition 4, let the T-shaped slider 13 slide to the left along the inner wall of the slide groove 12, so as to remove the microporous partitions 4 one by one. The user increases or decreases the setting of the microporous partition 4 according to different usage requirements. The clamping head 21 is plugged into the inner wall of the slot 22, and the mounting plate 18 passes through the left side of the slot 12. When the mounting plate 18 is plugged into the left side of the plug-in block 3, the two clamping heads 21 are driven to be clamped to the inner wall of the slot 22, thereby blocking the slot 12 and blocking the microporous partition 4.

[0038] When the user needs to adjust the number of layers of the microporous partition 4, the baffle 2 is opened at this time, and the multiple microporous partitions 4 and the filling layer 5 are driven to separate from the shell 1, and then the mounting plate 18 is pulled out and separated from the plug-in block 3. At this time, the microporous partitions 4 can be moved to the left one by one, and the T-shaped slider 13 can be separated from the slide groove 12, so that the user can adjust the number of layers of the microporous partition 4 and the length of the filling layer 5 as needed. After the adjustment, the microporous partitions 4 are arranged in the order of large on the left and small on the right according to their apertures, and installed between the T-shaped slider 13 and the plug-in block 3, and then the mounting plate 18 is reset, and the clamping heads 21 on both sides are clamped to the inner wall of the clamping groove 22, thereby blocking the microporous partition 4, thereby improving the applicability of the engine muffler.

[0039] Embodiment 4: On the basis of embodiment 3, in order to improve the accuracy of the installation position of the microporous partition 4 and the stability of the installation, a rubber plate 23 is installed on the side of the multiple plug-in blocks 3 away from the shell 1, and a plurality of fitting grooves 24 are opened on the side of the multiple rubber plates 23 away from the plug-in blocks 3; the multiple fitting grooves 24 are fitted on the outer side of the microporous partition 4 on the side away from the plug-in blocks 3, so that when the microporous partition 4 is installed, the outer side thereof is fitted with the fitting grooves 24 and the friction between the two is increased, thereby facilitating the fixing of the position of the microporous partition 4 and improving the stability of its installation; the rubber plate 23 is sleeved on the outer side of the T-shaped slider 13 and fits with the T-shaped slider 13, thereby facilitating the T-shaped slider 13 to slide to the left and allow it to detach from the plug-in block 3, thereby facilitating the user to adjust the microporous partition 4.

[0040] When the microporous partition 4 is installed, a rubber plate 23 is installed on one side of the plug-in block 3, and a fitting groove 24 is opened on one side of the rubber plate 23, and at the same time, the T-shaped slider 13 passes through the rubber plate 23 and fits with the rubber plate 23, so that when the microporous partition 4 is installed to the right, its outer side is close to the rubber plate 23. When it moves to a certain position, the microporous partition 4 will fit with the fitting groove 24, thereby increasing the friction between the microporous partition 4 and the rubber plate 23, and fixing the position of the microporous partition 4, thereby improving the accuracy and stability of the installation position of the microporous partition 4, and at the same time improving the use effect of the engine muffler.

[0041] Embodiment 5: Based on Embodiment 4, a method for using the multi-layer microporous structure of an engine muffler is proposed, comprising the following steps:

[0042] Step 1: When removing the baffle 2, the operator first holds the plug-in rod 6 on the inner wall of the buckle groove 17 and slides it to the right, and allows the two rubber frames 16 on the right side to separate from the sealing ring 7. At this time, the left side of the plug-in rod 6 will slide to the right along the inner wall of the movable groove 20 and gradually move away from the block 15. Since the inner wall of the arc groove 9 is installed with a rubber ring 14, and the rubber ring 14 is in an extruded state, the elastic force of the rubber ring 14 itself is used to push the block 15 to move and separate from the arc groove 9, while allowing it to reset to the inner wall of the movable groove 20. At this time, the baffle plate 2 can be pulled to the right, and the rubber plug block 19 can be driven to gradually disengage from the plug slot 11. Then, the baffle plate 2 can be pulled to the right, and the four plug blocks 3 can be driven to slide to the right along the inner wall of the installation slot 8. At the same time, the rubber plug block 19 can be gradually disengaged from the inner wall of the plug slot 11, so that it is convenient for the operator to separate the shell 1 and the baffle plate 2. Then, the operator can maintain the microporous partition plate 4 and the filling layer 5 and adjust them according to the needs, so that the operator can perform maintenance without the help of tools, and the efficiency of maintenance can be improved.

[0043] Step 2. After the maintenance is completed, the operator inserts the plug-in block 3 to the left along the inner wall of the installation groove 8, and drives the microporous partition plate 4 and the filling layer 5 between the four plug-in blocks 3 to move synchronously toward the inner wall of the shell 1. When it moves to a certain position, the left side of the rubber plug-in block 19 will first contact the inner wall of the plug-in groove 11, and as the plug-in block 3 moves to the left, it will gradually plug into the plug-in groove 11, and at the same time be in an extruded deformation state, thereby increasing the firmness of the installation between the plug-in block 3 and the shell 1, and indirectly increasing the stability of the installation between the baffle 2 and the shell 1. After completion, the operator plugs the plug-in block 3 into the inner wall of the installation groove 8, and at the same time drives the microporous partition plate 4 and the filling layer 5 between the four plug-in blocks 3 to move synchronously toward the inner wall of the shell 1. The movable baffle 2 is reset to the left, and the sealing ring 7 is pushed to be inserted into the inner wall of the rubber ring 14. At this time, the rubber plug 19 is inserted into the inner wall of the plug-in groove 11 and is extruded and deformed. At the same time, the operator inserts the plug rod 6 into the inner wall of the sealing ring 7, and allows the left side to slide along the inner wall of the movable groove 20 while the block 15 is inserted into the inner wall of the arc groove 9 and squeezes the rubber ring 14. Then the operator fully inserts the plug rod 6 and allows the two rubber frames 16 on the right side to fit with the inner wall of the buckle groove 17 to increase the friction between the two, thereby improving the stability of the installation between the baffle 2 and the housing 1, and at the same time, it can also improve the sealing between the two.

[0044] Step 3, when the user needs to adjust the number of layers of the microporous partition 4, the limiting mechanism is removed, the baffle 2 is opened, and the multiple microporous partitions 4 and the filling layer 5 are driven to separate from the shell 1, and then the mounting plate 18 is pulled out and separated from the plug-in block 3. At this time, the microporous partitions 4 can be moved to the left one by one, and the T-shaped slider 13 is separated from the slide groove 12, so that the user can adjust the number of layers of the microporous partition 4 and the length of the filling layer 5 as needed. After the adjustment, the microporous partitions 4 are arranged in the order of large on the left and small on the right according to their apertures, and installed between the T-shaped slider 13 and the plug-in block 3, and then the mounting plate 18 is reset, and the clamping heads 21 on both sides are clamped to the inner wall of the clamping groove 22, thereby blocking the microporous partition 4, thereby improving the applicability of the engine muffler;

[0045] Step 4. When installing the microporous partition 4, since a rubber plate 23 is installed on one side of the plug-in block 3, and a fitting groove 24 is opened on one side of the rubber plate 23, and at the same time, the T-shaped slider 13 passes through the rubber plate 23 and fits with the rubber plate 23, so that when the microporous partition 4 is installed to the right, its outer side is close to the rubber plate 23. When it moves to a certain position, the microporous partition 4 will fit with the fitting groove 24, thereby increasing the friction between the microporous partition 4 and the rubber plate 23, and fixing the position of the microporous partition 4, thereby improving the accuracy and stability of the installation position of the microporous partition 4, and at the same time improving the use effect of the engine muffler.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-layer microporous structure of an engine muffler, comprising a shell (1), wherein the inner wall of the shell (1) is provided with a plurality of microporous partitions (4), a filling layer (5) is provided between every two of the microporous partitions (4), and a baffle (2) is installed on the right side of the shell (1), characterized in that: The inner wall of the shell (1) is provided with a plurality of mounting grooves (8), the inner wall of the mounting groove (8) is plugged with a plug-in block (3), the left side of the plug-in block (3) is plugged with a mounting plate (18), the left side of the mounting plate (18) is provided with two rubber plug-in blocks (19), the left side of the inner wall of the shell (1) is provided with a plurality of plug-in grooves (11), the rubber plug-in blocks (19) are plugged into the inner wall of the plug-in groove (11), the right sides of the plurality of plug-in blocks (3) are all installed on the left side of the baffle (2), and the plurality of plug-in blocks ( 3) A slide groove (12) is provided on the side away from the shell (1), and a plurality of T-shaped sliders (13) are slidably connected to the inner wall of the slide groove (12), two clamping heads (21) are installed on the outer side of the mounting plate (18), and two clamping grooves (22) are provided on the left side of the plug-in block (3), and the plurality of T-shaped sliders (13) are installed between the microporous partition plate (4) on the side away from the shell (1), and the clamping heads (21) are plugged into the inner wall of the clamping groove (22), and the mounting plate (18) passes through the left side of the slide groove (12).

2. The multi-layer microporous structure of an engine muffler according to claim 1, characterized in that: The right side of the baffle (2) is provided with a plurality of buckle grooves (17), the inner wall of the buckle groove (17) is plugged with a plug-in rod (6), the right outer side of the plug-in rod (6) is installed with two rubber frames (16), the right side of the plug-in block (3) is provided with a movable groove (20), the left side of the movable groove (20) is installed with a clamping block (15), the right side of the inner wall of the installation groove (8) is provided with an arc groove (9), the inner wall of the arc groove (9) is installed with a rubber ring (14), the left side of the baffle (2) is installed with a sealing ring (7), and the right side of the housing (1) is provided with a clamping groove (10).

3. The multi-layer microporous structure of an engine muffler according to claim 2, characterized in that: The plug-in rod (6) passes through the buckle groove (17), and the left side of the plug-in rod (6) is plugged into the inner wall of the movable groove (20), the left side of the plug-in rod (6) is fitted with the clamping block (15), and the outer side of the rubber frame (16) is fitted with the inner wall of the buckle groove (17).

4. The multi-layer microporous structure of an engine muffler according to claim 2, characterized in that: The clamping block (15) passes through the movable groove (20), and the sides of the plurality of clamping blocks (15) away from the plug-in rod (6) are all plugged into the inner wall of the arc groove (9), the sides of the plurality of clamping blocks (15) away from the plug-in rod (6) are all in contact with the rubber ring (14) and squeeze the rubber ring (14), and the sealing ring (7) is plugged into the inner wall of the clamping groove (10).

5. The multi-layer microporous structure of an engine muffler according to claim 1, characterized in that: A rubber plate (23) is installed on one side of the plurality of plug-in blocks (3) away from the housing (1), and a plurality of fitting grooves (24) are provided on one side of the plurality of rubber plates (23) away from the plug-in blocks (3).

6. The multi-layer microporous structure of an engine muffler according to claim 5, characterized in that: The sides of the plurality of fitting grooves (24) away from the plug-in block (3) are all fitted to the outer side of the microporous partition plate (4).

7. The multi-layer microporous structure of an engine muffler according to claim 5, characterized in that: The rubber plate (23) is sleeved on the outside of the T-shaped slider (13) and fits closely to the T-shaped slider (13).

8. The multi-layer microporous structure of an engine muffler according to claim 1, characterized in that: The plurality of plug-in blocks (3) are centrally symmetrically arranged with the housing (1) as the center of the circle, and the rubber plug-in block (19) is in an extruded deformation state when plugged into the inner wall of the plug-in slot (11).

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