Noise reduction device for micropore resonance

Abstract

The invention relates to the technical field of silencers, in particular to a micropore resonance noise reduction device which comprises a barrel, an air inlet is formed in one end of the barrel, an air guide plate is arranged in the air inlet, a first expansion cavity and a second expansion cavity are formed in the barrel, and an air outlet pipe is arranged at the other end of the barrel. The air inlet is arranged on one side in the barrel close to the air inlet; the scraper assembly is arranged on the multi-stage filtering assembly; the dust collecting bin is arranged at the bottom of the multi-stage filtering assembly; the push plate is arranged between the multi-stage filtering assembly and the dust collecting bin; flue gas enters the cylinder through the gas inlet, the flue gas passes through the multi-stage filtering assembly to be subjected to graded screening, when the flue gas passes through the multi-stage filtering assembly, the flue gas pushes the scraper assembly to rotate so as to clean the surface of the filtering net, and finally, smoke dust at the bottom can be cleaned into a dust collection bin through a push plate. Therefore, smoke is prevented from entering the silencer, and the service life of the silencer is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of mufflers, and in particular to a microporous resonance noise reduction device. Background Art

[0002] According to its principle, the muffler can be divided into resistive muffler, reactive muffler, impedance composite muffler, etc. Resistive muffler uses the sudden change of cross section or the adjacent resonance cavity on the pipeline to make certain frequency sound waves propagating along the pipeline reflect and interfere at the sudden change of cross section, so as to achieve the purpose of muffler. Resistive muffler has good medium and low frequency muffler characteristics. Resistive muffler can be regarded as energy absorbing muffler, which uses the sound wave passing through the porous sound absorbing material. Due to friction and viscous resistance, the porous material vibrates, converting the sound wave energy into kinetic energy, heat energy and other forms of energy dissipation, thereby reducing the sound wave energy and achieving the purpose of muffler. Resistive muffler has good medium and high frequency muffler effect.

[0003] However, in the existing exhaust pipes of power equipment such as generator sets, a large amount of smoke is carried by the exhaust gas. After the smoke enters the muffler, the smoke is easily retained in the muffler, thereby reducing the working effect of the muffler and shortening the service life of the muffler. Summary of the invention

[0004] The purpose of the present invention is to solve the above-mentioned shortcomings and provide a micro-hole resonance noise reduction device.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A microporous resonance noise reduction device comprises a cylinder, one end of the cylinder is provided with an air inlet, an air guide plate is provided in the air inlet, a first expansion cavity and a second expansion cavity are provided in the cylinder, and the other end of the cylinder is provided with an air outlet pipe, and further comprises:

[0007] The multi-stage filter assembly is arranged on one side of the cylinder body close to the air inlet and is used to filter the smoke;

[0008] The scraper assembly is arranged on the multi-stage filter assembly and is used for cleaning the multi-stage filter assembly;

[0009] A dust collecting bin is provided at the bottom of the multi-stage filter assembly and is used to collect smoke and dust;

[0010] The push plate is arranged between the multi-stage filtering assembly and the dust collecting bin, and is used to sweep the smoke and dust into the dust collecting bin.

[0011] Furthermore, the multi-stage filter assembly includes a primary filter screen, a secondary filter screen and a tertiary filter screen, and the filter holes of the three filter screens are gradually reduced. A fixing rod is arranged between the three filter screens, and three scraper assemblies are sleeved on the fixing rod.

[0012] Furthermore, the scraper assembly includes a collar sleeved on the fixed rod, a plurality of blades are arranged on the collar, and a cleaning brush which is rotatably arranged on the blades and is in close contact with the filter screen.

[0013] Furthermore, a stopper fixed on the fixing rod is arranged on one side of the collar, a limiting block is arranged on the other side of the collar, and a damping shock absorber is arranged between the collar and the limiting block.

[0014] Furthermore, a fixed block is arranged on the blade, a fixed shaft is rotatably arranged on the fixed block, a cleaning brush is sleeved on the fixed shaft, and a torsion spring sleeved on the fixed shaft is arranged between the cleaning brush and the fixed block.

[0015] Furthermore, a drop opening is provided at the bottom of the cylinder, a sealing plate is provided at the bottom of the drop opening, a lead screw is rotatably provided in the dust collecting bin, a movable slider sleeved on the lead screw is provided on one side of the sealing plate, a guide wheel is rotatably provided in the drop opening, a pull rope wound around the guide wheel is provided at one end of the sealing plate, and the end of the pull rope away from the sealing plate is connected to the push plate.

[0016] Furthermore, a slide rail is provided in the cylinder, and the push plate is slidably connected to the cylinder through the slide rail. A sleeve plate is provided on the side of the push plate away from the guide wheel, and a movable plate connected to the push plate is slidably provided at one end of the sleeve plate. A return spring connected to the movable plate is also provided in the sleeve plate.

[0017] Furthermore, the first expansion chamber includes a first partition and a second partition arranged in the cylinder, an expansion tube is arranged between the first partition and the second partition, a third partition is arranged in the second expansion chamber, and the air outlet pipe is arranged on the third partition.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention is provided with a multi-stage filtering assembly, a scraper assembly, a dust collecting bin and a push plate. When the smoke enters the cylinder through the air inlet, it will first pass through the multi-stage filtering assembly to grade and screen the smoke. When the smoke passes through, the scraper assembly will be pushed by the smoke to rotate to clean the surface of the filter. Finally, the smoke dust at the bottom can be cleaned into the dust collecting bin by the push plate, thereby preventing the smoke from entering the muffler and improving the service life of the muffler. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the connection between the first expansion cavity and the second expansion cavity of the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the multi-stage filter assembly of the present invention;

[0024] Figure 4 It is a structural schematic diagram of the scraper assembly of the present invention;

[0025] Figure 5 It is a schematic diagram of the connection between the cleaning brush and the blade of the present invention;

[0026] Figure 6 It is a structural schematic diagram of the push plate of the present invention.

[0027] In the figure: 1. cylinder; 2. air inlet; 3. first expansion chamber; 31. first partition; 32. second partition; 33. expansion tube; 4. second expansion chamber; 41. third partition; 5. air outlet pipe; 6. multi-stage filter assembly; 61. primary filter screen; 62. secondary filter screen; 63. tertiary filter screen; 64. fixing rod; 65. stopper; 7. scraper assembly; 71. collar; 72. blade; 721. fixing block; 722. fixed shaft; 723. torsion spring; 73. cleaning brush; 74. limit block; 75. damping shock absorber; 8. dust collecting bin; 81. sealing plate; 811. movable slider; 82. lead screw; 83. guide wheel; 84. pull rope; 9. push plate; 91. slide rail; 92. sleeve plate; 93. movable plate; 94. reset spring. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0029] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0030] Reference Figure 1-Figure 6As shown, a microporous resonance noise reduction device is mainly used for the exhaust pipe of power equipment, including a cylinder 1, an air inlet 2 is arranged at one end of the cylinder 1, an air guide plate is arranged in the air inlet 2, a first expansion chamber 3 and a second expansion chamber 4 are arranged in the cylinder 1 for muffler operation of smoke, and an air outlet pipe 5 is arranged at the other end of the cylinder 1;

[0031] The first expansion chamber 3 includes a first partition plate 31 and a second partition plate 32 disposed in the cylinder 1, an expansion tube 33 is disposed between the first partition plate 31 and the second partition plate 32, a third partition plate 41 is disposed in the second expansion chamber 4, and an air outlet pipe 5 is disposed on the third partition plate 41;

[0032] Also includes:

[0033] The multi-stage filter assembly 6 is arranged on one side of the cylinder 1 close to the air inlet 2 and is used to filter the smoke;

[0034] After the smoke enters through the air inlet 2, it is first filtered by the multi-stage filter assembly 6. The filtered smoke enters the first expansion chamber 3 for expansion and silencer, part of the exhaust gas enters the exhaust pipe 5 through the expansion tube 33, and part of the exhaust gas enters the second expansion chamber 4 through the expansion tube 33 for expansion and silencer, and the expanded and silenced exhaust gas is discharged through the exhaust pipe 5.

[0035] The scraper assembly 7 is arranged on the multi-stage filter assembly 6, wherein the calcium scraper assembly 7 can rotate along the surface of the multi-stage filter assembly 6 to clean the multi-stage filter assembly 6 to prevent the filter holes from being blocked;

[0036] A dust collecting bin 8 is provided at the bottom of the multi-stage filter assembly 6 and is used to collect smoke and dust;

[0037] The push plate 9 is arranged at the bottom of the cylinder 1 between the multi-stage filtering assembly 6 and the dust collecting bin 8, and is used to sweep the smoke and dust into the dust collecting bin 8.

[0038] In one embodiment, the multi-stage filter assembly 6 includes a primary filter 61, a secondary filter 62 and a tertiary filter 63, and the filter holes of the three filter nets are gradually reduced, so that the smoke can be graded and filtered. A fixed rod 64 is arranged between the three filter nets, and three scraper assemblies 7 are mounted on the fixed rod 64. The scraper assembly 7 can rotate along the fixed rod 64 to clean the surface of the filter net to prevent the filter holes from being blocked.

[0039] In one embodiment, the scraper assembly 7 includes a collar 71 sleeved on the fixed rod 64, a plurality of blades 72 are arranged on the collar 71, and a cleaning brush 73 which is rotatably arranged on the blades 72 and is closely attached to the filter screen;

[0040] After the smoke enters the cylinder 1, it will pass through the inclined surface of the blade 72 and push the blade 72 to rotate, thereby driving the cleaning brush 73 to rotate along the surface of the filter screen to clean the surface of the filter screen.

[0041] In one embodiment, a stopper 65 fixed on the fixed rod 64 is provided on one side of the collar 71, a limit block 74 is provided on the other side of the collar 71, and a damping shock absorber 75 is provided between the collar 71 and the limit block 74. The damping shock absorber 75 is a combination of a damper and a limit spring. When the smoke passes through, the scraper assembly 7 will also be driven to move toward the filter screen. At this time, the cleaning brush 73 will be pressed inward to cause a certain deflection.

[0042] In one embodiment, a fixed block 721 is provided on the blade 72, a fixed shaft 722 is rotatably provided on the fixed block 721, the cleaning brush 73 is sleeved on the fixed shaft 722, and a torsion spring 723 sleeved on the fixed shaft 722 is provided between the cleaning brush 73 and the fixed block 721;

[0043] When the scraper assembly 7 is close to the filter, the cleaning brush 73 is deflected by the fixed rotating shaft 722, and the cleaning brush 73 is inclined, which is also convenient for cleaning the filter. At the same time, the cleaning brush 73 will also compress the torsion spring 723. After the scraper assembly 7 is away from the filter, the cleaning brush 73 will be deflected back under the elastic force of the torsion spring 723.

[0044] In one embodiment, a drop opening is provided at the bottom of the cylinder 1, a sealing plate 81 is provided at the bottom of the drop opening, a lead screw 82 is rotatably provided in the dust collecting bin 8, a movable slider 811 sleeved on the lead screw 82 is provided on one side of the sealing plate 81, a guide wheel 83 is rotatably provided in the drop opening, a pull rope 84 wound around the guide wheel 83 is provided at one end of the sealing plate 81, and the end of the pull rope 84 away from the sealing plate 81 is connected to the push plate 9;

[0045] After filtering, most of the smoke and dust will fall into the bottom cylinder 1. At this time, by rotating the screw 82, the sealing plate 81 is gradually opened. When the sealing plate 81 moves, it will pull the push plate 9 through the pull rope 84, and use the push plate 9 to push the smoke and dust at the bottom into the dust collecting bin 8.

[0046] In one embodiment, a slide rail 91 is provided in the cylinder 1, and the push plate 9 is slidably connected to the cylinder 1 through the slide rail 91. A sleeve plate 92 is provided on the side of the push plate 9 away from the guide wheel 83, and a movable plate 93 connected to the push plate 9 is slidably provided at one end of the sleeve plate 92. A return spring 94 connected to the movable plate 93 is also provided in the sleeve plate 92;

[0047] When the push plate 9 moves forward, it will pull the movable plate 93, and the movable plate 93 will stretch the return spring 94. After the smoke and dust are cleaned up, the sealing plate 81 moves back to block the drop opening. At this time, the movable plate 93 will move back under the elastic force of the return spring 94 and pull the push plate 9, so that the push plate 9 returns to its original position again and is close to the sleeve plate 92.

[0048] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A microporous resonance noise reduction device, comprising a cylinder (1), one end of the cylinder (1) is provided with an air inlet (2), an air guide plate is provided in the air inlet (2), a first expansion chamber (3) and a second expansion chamber (4) are provided in the cylinder (1), and the other end of the cylinder (1) is provided with an air outlet pipe (5), characterized in that: Also includes: A multi-stage filter assembly (6) is arranged on one side of the cylinder (1) close to the air inlet (2) and is used to filter the smoke; The scraper assembly (7) is arranged on the multi-stage filter assembly (6) and is used to clean the multi-stage filter assembly (6); A dust collecting bin (8), arranged at the bottom of the multi-stage filter assembly (6), for collecting smoke and dust; The push plate (9) is arranged between the multi-stage filtering assembly (6) and the dust collecting bin (8) and is used to sweep the smoke into the dust collecting bin (8).

2. A micropore resonance noise reduction device according to claim 1, characterized in that: The multi-stage filter assembly (6) comprises a primary filter screen (61), a secondary filter screen (62) and a tertiary filter screen (63), wherein the filter holes of the three filter screens gradually decrease, a fixing rod (64) is arranged between the three filter screens, and three scraper assemblies (7) are sleeved on the fixing rod (64).

3. A micropore resonance noise reduction device according to claim 2, characterized in that: The scraper assembly (7) comprises a collar (71) sleeved on a fixed rod (64), a plurality of blades (72) being arranged on the collar (71), and a cleaning brush (73) which is rotatably arranged on the blades (72) and is closely attached to the filter net.

4. A micropore resonance noise reduction device according to claim 3, characterized in that: A stopper (65) fixed on the fixing rod (64) is arranged on one side of the collar (71), a limit block (74) is arranged on the other side of the collar (71), and a damping shock absorber (75) is arranged between the collar (71) and the limit block (74).

5. A micropore resonance noise reduction device according to claim 3, characterized in that: The blade (72) is provided with a fixed block (721), a fixed rotating shaft (722) is rotatably provided on the fixed block (721), the cleaning brush (73) is sleeved on the fixed rotating shaft (722), and a torsion spring (723) sleeved on the fixed rotating shaft (722) is provided between the cleaning brush (73) and the fixed block (721).

6. A micropore resonance noise reduction device according to claim 1, characterized in that: A drop opening is provided at the bottom of the cylinder (1), a sealing plate (81) is arranged at the bottom of the drop opening, a lead screw (82) is rotatably arranged in the dust collecting bin (8), a movable slider (811) sleeved on the lead screw (82) is arranged on one side of the sealing plate (81), a guide wheel (83) is rotatably arranged in the drop opening, a pull rope (84) wound around the guide wheel (83) is arranged at one end of the sealing plate (81), and the end of the pull rope (84) away from the sealing plate (81) is connected to the push plate (9).

7. A micropore resonance noise reduction device according to claim 6, characterized in that: A slide rail (91) is arranged inside the cylinder (1), and the push plate (9) is slidably connected to the cylinder (1) via the slide rail (91). A sleeve plate (92) is arranged on the side of the push plate (9) away from the guide wheel (83), and a movable plate (93) connected to the push plate (9) is slidably arranged at one end of the sleeve plate (92), and a return spring (94) connected to the movable plate (93) is also arranged inside the sleeve plate (92).

8. A micropore resonance noise reduction device according to claim 1, characterized in that: The first expansion chamber (3) comprises a first partition plate (31) and a second partition plate (32) arranged in the cylinder (1), an expansion tube (33) is arranged between the first partition plate (31) and the second partition plate (32), a third partition plate (41) is arranged in the second expansion chamber (4), and an air outlet pipe (5) is arranged on the third partition plate (41).

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