An internal combustion engine exhaust muffler

Abstract

This invention discloses an exhaust muffler for an internal combustion engine, comprising a muffler pipe, which is cylindrical in shape, with a collection pipe disposed inside the air inlet of the muffler pipe; a muffler assembly is connected to the tail end of the collection pipe, the muffler assembly including a guide pipe, a noise reduction pipe, a baffle plate, and an outlet pipe; the guide pipe is a variable diameter spiral pipe, with one end connected to the collection pipe and the other end connected to the noise reduction pipe; the noise reduction pipe is a spiral pipe made of sound-absorbing material; the baffle plate is fixedly connected inside the muffler pipe near the air outlet, dividing the muffler pipe into a muffler space and an outlet space; one end of the outlet pipe is connected to the noise reduction pipe, and the other end is vertically fixedly connected to the baffle plate; multiple drain ports are opened on the lower side of the noise reduction pipe, and an outlet assembly is disposed inside each drain port. This invention extends the gas travel distance and continuously causes the gas to collide with each other during the travel process, reducing energy charging and lowering the generated noise.

Description

Technical Field

[0001] This invention relates to the field of internal combustion engine technology, and in particular to an exhaust muffler for internal combustion engines. Background Technology

[0002] An internal combustion engine is a heat engine that converts the heat energy released by burning fuel inside the machine into power. During the combustion process, a large amount of exhaust gas is produced, which needs to be effectively discharged in order to reduce the noise generated during exhaust.

[0003] Chinese patent CN105569773A discloses a diesel engine or internal combustion engine exhaust muffler. It is a noise reduction device at the exhaust outlet of various diesel engines or internal combustion engines, which has end face sealing plates and inner reinforcing ribs welded to both ends of the muffler pipe; the muffler pipe has a product nameplate, airflow direction markings, drain nuts and bolt plugs.

[0004] The aforementioned mufflers need to filter and discharge particles in the exhaust gas during use. However, the mufflers cannot guarantee the filtration effect during the particle filtration process and are prone to clogging, which affects the exhaust efficiency. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies that cannot guarantee the filtration effect during the particle filtration and discharge process, and are prone to clogging, thus affecting the efficiency of exhaust. Therefore, this invention proposes an exhaust muffler for internal combustion engines.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An exhaust muffler for an internal combustion engine includes a muffler pipe, which is a cylindrical pipe with an air inlet and an air outlet at both ends, the inlet of which has a diameter smaller than the pipe diameter. A collection pipe is provided inside the air inlet of the muffler pipe.

[0008] The end of the collecting tube is connected to a silencing component, which includes an air guide tube, a noise reduction tube, a baffle plate, and an outlet tube. The air guide tube is a spiral tube, with one end connected to the collecting tube and the other end connected to the noise reduction tube. The noise reduction tube is also a spiral tube and is made of sound-absorbing material. The baffle plate is fixedly connected inside the silencing tube near the air outlet, dividing the silencing tube into a silencing space and an outlet space. One end of the outlet tube is connected to the noise reduction tube, and the other end is vertically fixedly connected to the baffle plate and connected to the outlet space.

[0009] The noise reduction tube has multiple drain outlets on its lower side. Each drain outlet has an outlet assembly, which includes an installation tube and a telescopic block. The installation tube is fixedly installed inside the drain outlet, and the telescopic block is installed inside the installation tube via a telescopic rod. The upper end of the telescopic block is conical.

[0010] Preferably, an elastic tube is provided between adjacent spirals of the noise-reducing tube, both ends of the elastic tube are connected to the noise-reducing tube, and the elastic tube is a folded tube and made of sound-absorbing material.

[0011] Preferably, a stretching component is vertically arranged on the partition plate, and the stretching component is used to stretch the spacing between the noise reduction tube spirals.

[0012] Preferably, the tensioning assembly includes a mounting post, a sliding ring, a connecting strip, and a spring tube. The mounting post is vertically fixedly connected to the center of the partition and coincides with the axis of the noise reduction tube. The two sliding rings are respectively fixedly connected to both ends of the spring tube to form a tensioning component. Multiple tensioning components are sleeved on the mounting post. The two connecting strips are respectively fixedly connected to the upper and lower ends of the sliding rings, and the other end is connected to the inner wall of the noise reduction tube.

[0013] Preferably, the collecting tube has a diameter at both ends that is larger than the diameter in the middle, and the end of the collecting tube near the air guide tube is set as a closed end and is connected to the air guide tube.

[0014] Preferably, the noise reduction space is provided with a noise reduction ring, which is made of sound-absorbing material and has a collection groove at the bottom, located directly below the sewage outlet.

[0015] Preferably, the outlet of the silencer pipe is configured as a bucket-shaped outlet, and a gas distribution component is provided inside the outlet space, which is used to disperse the gas.

[0016] Preferably, the gas distribution assembly includes gas distribution rings and a fixing block, with multiple gas distribution rings nested together, and the fixing block fixedly connected between the multiple gas distribution rings for fixing the multiple gas distribution rings.

[0017] Preferably, the spacing between the air distribution rings is different, and the spacing between two adjacent air distribution rings gradually decreases from the outside to the inside.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] By using a spiral-shaped air guide tube and a noise reduction tube, the impact force generated when the gas is discharged can be effectively reduced. Extending the noise reduction tube can extend the distance the gas travels, and the gas will continuously collide with each other during the movement, reducing energy and lowering the noise generated.

[0020] During the gas guiding process, due to the impact of the gas, a large number of impurities fall below the noise reduction tube, causing the impurities to accumulate. Finally, the collected impurities are discharged through the drain port. During the discharge process, the installation tube is exposed by the moving telescopic block, thereby exporting the impurities.

[0021] When the gas flow rate is large, in order to ensure the dispersion and noise reduction of the gas, the elastic tube is stretched by the stretching component, thereby extending the elastic tube, changing the pitch between the noise reduction tubes, and extending the gas movement length, so as to effectively absorb and reduce noise from the large air flow.

[0022] The gas separator is used to disperse the gas, and the gas undergoes noise reduction and impurity removal. The gas is separated and discharged through the gas separator, thereby improving the gas discharge effect. Attached Figure Description

[0023] Figure 1 This is a front structural diagram of an internal combustion engine exhaust muffler proposed in this invention;

[0024] Figure 2 This is a cross-sectional view of an internal combustion engine exhaust muffler proposed in this invention;

[0025] Figure 3 This is a front view of the muffler assembly of an internal combustion engine exhaust muffler proposed in this invention;

[0026] Figure 4 This is a schematic diagram of the back structure of the muffler assembly of an internal combustion engine exhaust muffler proposed in this invention;

[0027] Figure 5 This is a schematic diagram of the air distribution assembly of an internal combustion engine exhaust muffler proposed in this invention.

[0028] In the diagram: 1. Silencing pipe, 2. Collection pipe, 3. Silencing component, 31. Air guide pipe, 32. Noise reduction pipe, 33. Partition, 34. Outlet pipe, 4. Outlet component, 41. Mounting pipe, 42. Telescopic block, 5. Elastic pipe, 6. Tension component, 61. Mounting column, 62. Sliding ring, 63. Connecting strip, 64. Spring pipe, 7. Noise reduction ring, 8. Air distribution component, 81. Air distribution ring, 82. Fixing block. Detailed Implementation

[0029] 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. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0030] The terms used in this invention, such as "upper," "lower," "left," "right," "middle," and "one," are merely for clarity of description and are not intended to limit the scope of the invention. Any changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0031] Reference Figures 1-5 An internal combustion engine exhaust muffler includes a muffler pipe 1, which is a cylindrical pipe with an air inlet and an air outlet at both ends, the inlet of which has a diameter smaller than the pipe diameter. A collection pipe 2 is provided inside the air inlet of the muffler pipe 1. The exhaust gas to be generated by combustion is introduced through the air inlet and collected through the collection pipe 2. The exhaust gas is then muffled inside the muffler pipe 1 and finally discharged from the air outlet.

[0032] The end of the collecting pipe 2 is connected to a silencing component 3. The silencing component 3 includes an air guide pipe 31, a noise reduction pipe 32, a baffle 33, and an outlet pipe 34. The air guide pipe 31 is a spiral pipe, with one end connected to the collecting pipe 2 and the other end connected to the noise reduction pipe 32. The noise reduction pipe 32 is a spiral pipe and is made of sound-absorbing material. The baffle 33 is fixedly connected to the end of the silencing pipe 1 near the air outlet, dividing the silencing pipe 1 into a silencing space and an outlet space. One end of the outlet pipe 34 is connected to the noise reduction pipe 32, and the other end is vertically fixedly connected to the baffle 33 and connected to the outlet space. Through the spiral air guide pipe 31 and the noise reduction pipe 32, the impact force generated when the gas is discharged can be effectively reduced. The extended noise reduction pipe 32 can extend the gas movement distance, and the gas will continuously collide with each other during the movement, reducing energy and reducing the noise generated.

[0033] The noise reduction tube 32 has multiple drain ports on its lower side. The drain ports are equipped with an outlet component 4, which includes an installation tube 41 and a telescopic block 42. The installation tube 41 is fixedly installed inside the drain port, and the telescopic block 42 is installed inside the installation tube 41 via a telescopic rod. The upper end of the telescopic block 42 is conical. During the air guiding process, due to the impact of the gas, a large amount of impurities fall below the noise reduction tube 32, causing the impurities to accumulate. Finally, the collected impurities are discharged through the drain ports. During the discharge process, the installation tube 41 is exposed by the moving telescopic block 42, thereby exporting the impurities.

[0034] In the embodiment of the above technical solution, the exhaust gas to be burned is introduced through the air inlet, collected through the collection pipe 2, and silencing is performed inside the silencer pipe 1. Finally, it is discharged from the air outlet. The spiral air guide pipe 31 and the noise reduction pipe 32 can effectively reduce the impact force generated when the gas is discharged. The extended noise reduction pipe 32 can extend the gas movement distance, and the gas will continuously collide with each other during the movement, reducing energy and lowering the noise generated. During the air guiding process, due to the impact of the gas, a large number of impurities fall below the noise reduction pipe 32, causing the impurities to accumulate. Finally, the collected impurities are discharged through the drain port. During the discharge process, the installation pipe 41 is exposed by the moving telescopic block 42, thereby discharging the impurities.

[0035] In this preferred embodiment, an elastic tube 5 is provided between adjacent spirals of the noise reduction tube 32. Both ends of the elastic tube 5 are connected to the noise reduction tube 32. The elastic tube 5 is a folded tube and is made of sound-absorbing material. In order to disperse and export the gas, multiple elastic tubes 5 are used to connect the noise reduction tubes 32, so that the introduced gas impacts the flowing gas, reducing the impact force of the gas, thereby reducing the noise generated by the gas during movement. Moreover, when the gas flow rate is large, it can be elastically stretched, thereby improving the absorption effect of the gas.

[0036] A tensioning component 6 is vertically arranged on the partition 33. The tensioning component 6 is used to stretch the pitch between the spirals of the noise reduction tubes 32. When the gas flow rate is large, in order to ensure the dispersion and noise reduction of the gas, the elastic tube 5 is stretched by the tensioning component 6, thereby extending the elastic tube 5, changing the pitch between the noise reduction tubes 32, and extending the movement length of the gas, so as to effectively absorb and reduce noise from the large air flow.

[0037] The tensioning assembly 6 includes a mounting post 61, a sliding ring 62, a connecting strip 63, and a spring tube 64. The mounting post 61 is vertically fixed to the center of the partition 33 and coincides with the axis of the noise reduction tube 32. Two sliding rings 62 are fixedly connected to both ends of the spring tube 64 to form a tensioning component. Multiple tensioning components are sleeved on the mounting post 61. Two connecting strips 63 are fixedly connected to the upper and lower ends of the sliding rings 62, and the other end is connected to the inner wall of the noise reduction tube 32. When the elastic tube 5 is stretched, the spring tube 64 in the middle is affected by the current, thereby controlling the extension and retraction of the spring tube 64. The two sliding rings 62 with different spacing drive the two connecting strips 63 to slide, thereby stretching the noise reduction tube 32 and the elastic tube 5 and changing the pitch of the noise reduction tube 32.

[0038] The collecting tube 2 has a diameter at both ends that is larger than the diameter in the middle. The end of the collecting tube 2 that is close to the gas guide tube 31 is set as a closed end and is connected to the gas guide tube 31. The collecting tube 2 with a diameter at both ends that is larger than the diameter in the middle facilitates the collection of gas and then its positioning and discharge, thereby collecting and expanding the discharge of the introduced gas and avoiding gas impact.

[0039] The noise reduction ring 7 is installed inside the silencing space. The noise reduction ring 7 is made of sound-absorbing material and has a collection groove at the bottom, located directly below the drain outlet. The noise reduction ring 7 improves the absorption of sound inside the silencing pipe 1 and improves the noise reduction effect.

[0040] The outlet of the silencer pipe 1 is set as a bucket-shaped outlet, and the outlet space is equipped with a gas distribution component 8. The gas distribution component 8 is used to disperse the gas. The gas that has completed the noise reduction and impurity removal process is separated and discharged through the gas distribution component 8, thereby improving the gas discharge effect.

[0041] The gas distribution assembly 8 includes a gas distribution ring 81 and a fixing block 82. Multiple gas distribution rings 81 are nested together, and the fixing block 82 is fixedly connected between the multiple gas distribution rings 81 to fix the multiple gas distribution rings 81. The multiple gas distribution rings 81 divide the gas that has undergone noise reduction treatment, thereby smoothly exporting the gas.

[0042] The spacing between the gas-splitting rings 81 is different. The spacing between two adjacent gas-splitting rings 81 gradually decreases from the outside to the inside. Since less gas is collected on the outside, the spacing between the gas-splitting rings 81 on the outside is greater than the spacing between the inside, thus ensuring effective gas separation.

[0043] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An exhaust muffler for an internal combustion engine, comprising a muffler pipe (1), characterized in that, The silencer pipe (1) is a cylindrical pipe, and an air inlet and an air outlet with a diameter smaller than the pipe diameter are respectively provided at both ends. A collection pipe (2) is provided inside the air inlet of the silencer pipe (1). The end of the collecting pipe (2) is connected to a silencing component (3). The silencing component (3) includes an air guide pipe (31), a noise reduction pipe (32), a partition (33), and an outlet pipe (34). The air guide pipe (31) is a spiral pipe, with one end connected to the collecting pipe (2) and the other end connected to the noise reduction pipe (32). The noise reduction pipe (32) is a spiral pipe and is made of sound-absorbing material. The partition (33) is fixedly connected to the end of the silencing pipe (1) near the air outlet, dividing the silencing pipe (1) into a silencing space and an outlet space. One end of the outlet pipe (34) is connected to the noise reduction pipe (32), and the other end is vertically fixedly connected to the partition (33) and connected to the outlet space. The noise reduction tube (32) has multiple drain ports on its lower side. The drain ports are equipped with an outlet assembly (4). The outlet assembly (4) includes an installation tube (41) and a telescopic block (42). The installation tube (41) is fixedly installed inside the drain port. The telescopic block (42) is installed inside the installation tube (41) via a telescopic rod. The upper end of the telescopic block (42) is conical. A tensioning component (6) is vertically arranged on the partition (33), and the tensioning component (6) is used to stretch the spacing between the spirals of the noise reduction tubes (32); The tensioning component (6) includes a mounting post (61), a sliding ring (62), a connecting strip (63), and a spring tube (64). The mounting post (61) is vertically fixed to the center of the partition (33) and coincides with the axis of the noise reduction tube (32). The spring tube (64) expands and contracts under the influence of electricity. The two sliding rings (62) are fixedly connected to the two ends of the spring tube (64) to form a tensioning component. Multiple tensioning components are sleeved on the mounting post (61). The two connecting strips (63) are fixedly connected to the upper and lower ends of the sliding ring (62), and the other end is connected to the inner wall of the noise reduction tube (32).

2. The exhaust muffler for an internal combustion engine according to claim 1, characterized in that, An elastic tube (5) is provided between adjacent spirals of the noise reduction tube (32). Both ends of the elastic tube (5) are connected to the noise reduction tube (32). The elastic tube (5) is a folded tube and is made of sound-absorbing material.

3. The exhaust muffler for an internal combustion engine according to claim 1, characterized in that, The collecting tube (2) has a diameter at both ends that is larger than the diameter in the middle. The end of the collecting tube (2) near the air guide tube (31) is set as a closed end and is connected to the air guide tube (31).

4. The exhaust muffler for an internal combustion engine according to claim 1, characterized in that, The noise reduction space is equipped with a noise reduction ring (7), which is made of sound-absorbing material and has a collection groove at the bottom, located directly below the sewage outlet.

5. The exhaust muffler for an internal combustion engine according to claim 1, characterized in that, The outlet of the silencer pipe (1) is configured as a bucket-shaped outlet, and a gas distribution component (8) is provided inside the outlet space. The gas distribution component (8) is used to disperse the gas.

6. The exhaust muffler for an internal combustion engine according to claim 5, characterized in that, The gas distribution assembly (8) includes a gas distribution ring (81) and a fixing block (82). Multiple gas distribution rings (81) are nested together, and the fixing block (82) is fixedly connected between multiple gas distribution rings (81) to fix multiple gas distribution rings (81).

7. The exhaust muffler for an internal combustion engine according to claim 6, characterized in that, The spacing between the gas distribution rings (81) is different, and the spacing between two adjacent gas distribution rings (81) gradually decreases from the outside to the inside.

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