Environment-friendly and noise-reducing automobile exhaust pipe

Abstract

The utility model discloses an environment-friendly and noise-reducing automobile exhaust pipe, which belongs to the technical field of automobile exhaust pipes, and is characterized by comprising a butt joint pipe, a three-way catalyst, a front silencer, a shunt pipe, a rear silencer and a tail pipe which are connected in sequence, and the butt joint pipe is connected with the three-way catalyst, the front silencer, the shunt pipe, the rear silencer and the tail pipe. The surface of the tail pipe is sleeved with a fixing cylinder, and a filtering assembly is arranged in the fixing cylinder. The filter assembly comprises a silencing cylinder, the filter assembly is arranged, and an interception layer, an activated carbon adsorption layer and a catalytic conversion layer are arranged in the filter cylinder, so that large-particle impurities and dust are intercepted when exhaust gas passes through the interception layer, and harmful gas and peculiar smell in the exhaust gas can be adsorbed through the activated carbon adsorption layer; and finally, harmful substances such as carbon monoxide and nitrogen oxide can be converted into harmless substances by a noble metal catalyst coated on the catalytic conversion layer, so that deep purification of the waste gas is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile exhaust pipes, in particular to an environmentally friendly and noise-reducing automobile exhaust pipe. Background Art

[0002] The exhaust pipe is part of the engine's exhaust system. The exhaust system mainly includes the exhaust manifold, exhaust pipe and muffler. Generally, a three-way catalytic converter for controlling engine pollutant emissions is also installed in the exhaust system. The exhaust pipe generally includes the front exhaust pipe and the rear exhaust pipe.

[0003] With the continuous increase in the number of cars, automobile exhaust emissions and noise issues are receiving increasing attention. Traditional automobile exhaust pipes have many shortcomings in terms of noise reduction, environmental protection and service life. For example, the high noise affects driving comfort and the environment; the exhaust gas purification effect is poor, causing atmospheric pollution; and when the temperature changes, the exhaust pipe is easily damaged due to expansion and contraction, shortening its service life.

[0004] Therefore, an environmentally friendly and noise-reducing automobile exhaust pipe is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide an environmentally friendly and noise-reducing automobile exhaust pipe, which can solve the many shortcomings of existing automobile exhaust pipes in terms of noise reduction, environmental protection and service life, such as the high noise affecting driving comfort and the environment; the poor exhaust gas purification effect causing atmospheric pollution; and the exhaust pipe is easily damaged due to expansion and contraction when the temperature changes, thereby shortening the service life.

[0006] To achieve the above objectives, the present invention provides the following technical solutions: an environmentally friendly, noise-reducing automobile exhaust pipe, comprising a butt-joint pipe, a three-way catalytic converter, a front muffler, a diverter pipe, a rear muffler, and a tail pipe, wherein the butt-joint pipe, the three-way catalytic converter, the front muffler, the diverter pipe, the rear muffler, and the tail pipe are connected in sequence, a fixed cylinder is sleeved on the surface of the tail pipe, and a filter assembly is disposed inside the fixed cylinder;

[0007] The filter assembly includes a silencer, which is arranged inside a fixed cylinder, and a filter cylinder is arranged on the rear side of the silencer. An interception layer, an activated carbon adsorption layer and a catalytic conversion layer are respectively arranged inside the filter cylinder.

[0008] Preferably, the silencer includes an outer tube, which is arranged inside the fixed tube, and a perforated tube is provided inside the outer tube, sealing plates are provided on the front and rear sides between the perforated tube and the outer tube, and a heat insulation layer and a sound absorption layer are provided between the perforated tube and the outer tube.

[0009] Preferably, the thermal insulation layer is made of ceramic fiber and is arranged on the surface of the orifice tube.

[0010] Preferably, the sound absorbing layer is made of glass fiber wool and is arranged on the surface of the heat insulation layer.

[0011] Preferably, the interception layer, adsorption layer and catalytic conversion layer are sequentially arranged inside the filter cartridge from back to front, and the interception layer is composed of a high-temperature resistant metal filter mesh.

[0012] Preferably, a clamping ring is provided at the top and bottom between the fixing tube and the tail pipe surface, and a connecting block is provided on both sides of the clamping ring, a bolt passes through the interior of the top connecting block, and the bottom of the bolt extends to the interior of the bottom connecting block and is threadedly connected thereto.

[0013] Preferably, a rubber pad is provided on the inner wall of the clamping ring, and the side of the rubber pad away from the clamping ring is in close contact with the surface of the fixing tube and the tail pipe respectively. Two fixing columns are provided on the inner wall of the clamping ring, and the side of the fixing column away from the clamping ring passes through the rubber pad and extends to the interior of the fixing tube and the tail pipe respectively.

[0014] Preferably, the connection between the butt-joint pipe and the front silencer and the diverter pipe is provided by a bellows, and the butt-joint pipe is connected to the three-way catalytic converter via a flange.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. This application sets up a filter assembly, through the interception layer, activated carbon adsorption layer and catalytic conversion layer set in the filter cartridge, to intercept larger particles of impurities and dust when the exhaust passes through the interception layer, and then the activated carbon adsorption layer can adsorb harmful gases and odors in the exhaust gas. Finally, the precious metal catalyst coated on the catalytic conversion layer can convert harmful substances such as carbon monoxide and nitrogen oxides into harmless substances, thereby achieving deep purification of the exhaust gas;

[0017] 2. This application, through the provision of a silencer and the sound-absorbing material filled inside the silencer, can enhance the noise reduction effect of the exhaust pipe and block the transmission of certain noise to the outside world, thereby greatly reducing the impact on driving comfort and the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the overall structural diagram of the environmentally friendly and noise-reducing automobile exhaust pipe of the present utility model;

[0019] Figure 2 This is a schematic diagram of the connection between the tail pipe, fixed cylinder and filter assembly of the utility model;

[0020] Figure 3 This is a schematic diagram of the connection of the silencer of the utility model;

[0021] Figure 4 This is a schematic structural diagram of the clamping ring of the utility model;

[0022] Figure 5 For this utility model Figure 2 Enlarged schematic diagram of point A in the middle.

[0023] In the figure, 1. butt joint; 2. three-way catalytic converter; 3. front silencer; 4. diverter pipe; 5. rear silencer; 6. tail pipe; 7. fixing cylinder; 8. filter assembly; 81. silencer; 811. outer cylinder; 812. perforated tube; 813. sealing plate; 814. heat insulation layer; 815. sound absorption layer; 82. filter cylinder; 83. interception layer; 84. activated carbon adsorption layer; 85. catalytic conversion layer; 9. retaining ring; 10. connecting block; 11. bolt; 12. rubber pad; 13. fixing column. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1-5 , this utility model provides a technical solution:

[0026] An environmentally friendly, noise-reducing automobile exhaust pipe comprises a butt-joint pipe 1, a three-way catalytic converter 2, a front muffler 3, a diverter pipe 4, a rear muffler 5, and a tail pipe 6. The butt-joint pipe 1, the three-way catalytic converter 2, the front muffler 3, the diverter pipe 4, the rear muffler 5, and the tail pipe 6 are sequentially connected. A fixed cylinder 7 is sleeved on the surface of the tail pipe 6, and a filter assembly 8 is disposed inside the fixed cylinder 7.

[0027] The filter assembly 8 includes a silencer 81, which is arranged inside the fixed cylinder 7, and a filter cylinder 82 is arranged on the rear side of the silencer 81. The filter cylinder 82 is respectively provided with an interception layer 83, an activated carbon adsorption layer 84 and a catalytic conversion layer 85.

[0028] In this embodiment: through the interception layer 83, the activated carbon adsorption layer 84 and the catalytic conversion layer 85 arranged in the filter tube 82, larger particles of impurities and dust are intercepted when the exhaust passes through the interception layer 83, and then the harmful gases and odors in the exhaust gas can be adsorbed by the activated carbon adsorption layer 84. Finally, the precious metal catalyst coated on the catalytic conversion layer 85 can convert harmful substances such as carbon monoxide and nitrogen oxides into harmless substances, thereby achieving deep purification of the exhaust gas. The setting of the silencer 81 and the sound-absorbing material filled inside the silencer 81 can enhance the noise reduction effect of the exhaust pipe, block the propagation of certain noise to the outside world, and greatly reduce the impact on driving comfort and the environment.

[0029] Specifically, such as Figure 2 、 Figure 3 As shown, the silencer 81 includes an outer tube 811, which is arranged inside the fixed tube 7, and a hole tube 812 is arranged inside the outer tube 811, and sealing plates 813 are arranged on the front and rear sides between the hole tube 812 and the outer tube 811, and a heat insulation layer 814 and a sound absorption layer 815 are arranged between the hole tube 812 and the outer tube 811.

[0030] Specifically, such as Figure 3 As shown, the thermal insulation layer 814 is made of ceramic fiber and is disposed on the surface of the orifice tube 812 .

[0031] Specifically, such as Figure 3 As shown, the sound absorbing layer 815 is made of glass fiber wool and is arranged on the surface of the heat insulating layer 814.

[0032] In this embodiment: by providing a silencer 81, exhaust gas is discharged through the perforated tube 812 to scatter the sound waves, interfere with and offset the positive waves, reduce the amplitude and energy of the sound waves, and absorb noise through the sound-absorbing layer 815 and control the reflection and interference of the sound waves, thereby achieving a further noise reduction effect. The heat insulation layer 814 can block the influence of the high temperature of the exhaust gas on the sound-absorbing layer 815, thereby ensuring the normal use of the sound-absorbing layer 815.

[0033] Specifically, such as Figure 2 As shown, the interception layer 83, the adsorption layer and the catalytic conversion layer 85 are sequentially arranged inside the filter cartridge 82 from back to front, and the interception layer 83 is composed of a high-temperature resistant metal filter mesh.

[0034] In this embodiment: by arranging the interception layer 83, the adsorption layer and the catalytic conversion layer 85 in sequence from back to front inside the filter cartridge 82, the effect of purifying the exhaust gas step by step can be achieved, and by arranging the interception layer 83 to be composed of a high-temperature resistant metal filter mesh, larger particles of impurities and dust can be intercepted.

[0035] Specifically, such as Figure 2 、 Figure 4 As shown, a clamping ring 9 is provided at the top and bottom between the fixing tube 7 and the surface of the tail pipe 6, and a connecting block 10 is provided on both sides of the clamping ring 9. A bolt 11 passes through the interior of the top connecting block 10, and the bottom of the bolt 11 extends to the interior of the bottom connecting block 10 and is threadedly connected thereto.

[0036] Specifically, such as Figure 5 As shown, a rubber pad 12 is provided on the inner wall of the clamping ring 9, and the side of the rubber pad 12 away from the clamping ring 9 is in close contact with the surfaces of the fixing cylinder 7 and the tail pipe 6 respectively. Two fixing columns 13 are provided on the inner wall of the clamping ring 9, and the side of the fixing columns 13 away from the clamping ring 9 passes through the rubber pad 12 and extends to the inside of the fixing cylinder 7 and the tail pipe 6 respectively.

[0037] In this embodiment, by providing a snap ring 9, two snap rings 9 can be respectively inserted between the upper and lower surfaces of the fixing cylinder 7 and the tail pipe 6, and the fixing column 13 is used to position the two. The bolt 11 structure is used to connect the two snap rings 9, thereby achieving the effect of connecting the fixing cylinder 7 and the tail pipe 6 and restricting the filter assembly 8 in the tail pipe 6.

[0038] Specifically, such as Figure 1 As shown, the connection between the butt-joint pipe 1 and the pre-muffler 3 and the diverter pipe 4 is all configured with a bellows, and the butt-joint pipe 1 is connected to the three-way catalytic converter 2 via a flange.

[0039] In this embodiment, the connection between the butt-joint pipe 1, the pre-muffler 3 and the diversion pipe 4 is provided with a bellows, which can freely expand and contract when the temperature changes, adapt to the length change of the exhaust pipe, avoid damage to the pipe due to stress caused by thermal expansion and contraction, and thus extend the service life of the exhaust pipe.

[0040] Working principle: When the exhaust pipe is in use, the step groove set between the tail pipe 6 and the fixed cylinder 7 can be used to drive the filter assembly 8 into the interior of the tail pipe 6, and the fixed cylinder 7 can be sleeved on the surface of the tail pipe 6. Then, two clamping rings 9 can be sleeved between the upper and lower surfaces of the fixed cylinder 7 and the tail pipe 6 respectively, and the two can be positioned by using the fixing column 13. The bolt 11 structure can be used to connect the two clamping rings 9, thereby connecting the fixed cylinder 7 to the tail pipe 6 and restricting the filter assembly 8 in the tail pipe 6. When exhausting, the exhaust gas first passes through the three-way catalytic converter 2 for preliminary conversion, and then passes through the pre-muffler 3, the diverter pipe 4 and the rear The silencer 5 is placed into the tail pipe 6, and the interception layer 83 in the filter cartridge 82 can intercept larger particles of impurities and dust, and then the activated carbon adsorption layer 84 can adsorb harmful gases and odors in the exhaust gas. Finally, the precious metal catalyst coated on the catalytic conversion layer 85 can convert harmful substances such as carbon monoxide and nitrogen oxides into harmless substances, thereby achieving deep and further purification of the exhaust gas. Subsequently, the exhaust is exhausted through the perforated tube 812 to scatter the sound waves, interfere with and offset the positive waves, reduce the amplitude and energy of the sound waves, and absorb noise through the sound-absorbing layer 815 and control the reflection and interference of the sound waves, thereby further reducing the noise of the exhaust gas, and finally discharged into the tail pipe 6.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An environmentally friendly and noise-reducing automobile exhaust pipe, comprising a butt-joint pipe (1), a three-way catalytic converter (2), a front muffler (3), a diverter pipe (4), a rear muffler (5) and a tail pipe (6), characterized in that: The butt-joint pipe (1), the three-way catalytic converter (2), the front silencer (3), the diverter pipe (4), the rear silencer (5) and the tail pipe (6) are connected in sequence; a fixed cylinder (7) is sleeved on the surface of the tail pipe (6), and a filter assembly (8) is provided inside the fixed cylinder (7); The filter assembly (8) comprises a silencer (81), the silencer (81) being arranged inside the fixed cylinder (7), and a filter cylinder (82) being arranged on the rear side of the silencer (81), and an interception layer (83), an activated carbon adsorption layer (84) and a catalytic conversion layer (85) being respectively arranged inside the filter cylinder (82).

2. The environmentally friendly and noise-reducing automobile exhaust pipe according to claim 1, characterized in that: The silencer (81) comprises an outer tube (811), the outer tube (811) being arranged inside the fixed tube (7), and a perforated tube (812) being arranged inside the outer tube (811), sealing plates (813) being arranged on the front and rear sides between the perforated tube (812) and the outer tube (811), and a heat insulation layer (814) and a sound absorption layer (815) being arranged between the perforated tube (812) and the outer tube (811).

3. The environmentally friendly and noise-reducing automobile exhaust pipe according to claim 2, characterized in that: The heat insulation layer (814) is made of ceramic fibers and is arranged on the surface of the orifice tube (812).

4. The environmentally friendly and noise-reducing automobile exhaust pipe according to claim 2, characterized in that: The sound absorbing layer (815) is made of glass fiber cotton and is arranged on the surface of the heat insulating layer (814).

5. The environmentally friendly and noise-reducing automobile exhaust pipe according to claim 1, characterized in that: The interception layer (83), the adsorption layer and the catalytic conversion layer (85) are sequentially arranged inside the filter cartridge (82) from the back to the front, and the interception layer (83) is composed of a high-temperature resistant metal filter mesh.

6. The environmentally friendly and noise-reducing automobile exhaust pipe according to claim 1, characterized in that: A clamping ring (9) is provided at the top and bottom between the surface of the fixing cylinder (7) and the tail pipe (6), and a connecting block (10) is provided on both sides of the clamping ring (9). A bolt (11) passes through the interior of the top connecting block (10), and the bottom of the bolt (11) extends to the interior of the bottom connecting block (10) and is threadedly connected thereto.

7. The environmentally friendly and noise-reducing automobile exhaust pipe according to claim 6, characterized in that: The inner wall of the clamping ring (9) is provided with a rubber pad (12), and the side of the rubber pad (12) away from the clamping ring (9) is in close contact with the surfaces of the fixing cylinder (7) and the tail pipe (6), respectively. The inner wall of the clamping ring (9) is provided with two fixing columns (13), and the side of the fixing columns (13) away from the clamping ring (9) penetrates the rubber pad (12) and extends to the inside of the fixing cylinder (7) and the tail pipe (6), respectively.

8. The environmentally friendly and noise-reducing automobile exhaust pipe according to claim 1, characterized in that: The connection points between the butt-joint pipe (1), the front silencer (3) and the diversion pipe (4) are all arranged using bellows, and the butt-joint pipe (1) is connected to the three-way catalytic converter (2) via a flange.

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