Silencing device for exhaust pipeline of diesel engine
By setting up partition and hedge plate structures in the diesel engine exhaust pipe, multiple expansion chambers are formed, and combined with basalt wool cloth and silencer pipes, the problem of poor noise silence effect in the existing diesel engine exhaust pipe is solved, achieving significant noise reduction effect.
Patent Information
- Application Number
- CN202421908304.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-08
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-08-08
AI Technical Summary
The existing diesel engine exhaust pipe silencer device has poor noise control effect and cannot effectively extend the noise propagation path, resulting in limited noise reduction effect.
The partition plate and hedge plate structure design in the cylinder body is designed to form multiple expansion chambers, and ventilation holes and punches are arranged by misalignment, combined with basalt wool cloth and silencer tubes, enhance the exhaust gas flow path and collision effect, and use the V-shaped curved intake pipe to change the flow direction.
It realizes the sound silence of the diesel engine exhaust pipe with simple structure and significant noise reduction effect, enhances the exhaust gas flow path and collision, and improves the sound silence effect.
Smart Images
Figure CN223089383U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of diesel engine silencer devices, in particular to a diesel engine exhaust pipe silencer device. Background Art
[0002] Noise has become one of the three major public hazards threatening human survival. With the development of industrial and agricultural production, the number of construction machinery and agricultural machinery in my country has increased rapidly. While improving production efficiency, the noise problem caused is becoming increasingly serious. Diesel engines are very different from automobile engines in noise control, so the noise of diesel engines is quite loud, especially in various construction machinery carried out in densely populated cities, the noise hazard is quite serious.
[0003] Most of the existing diesel engine exhaust pipe silencers have ventilation ducts arranged in parallel with each other and chambers formed by partitions arranged perpendicular to the ventilation ducts, which have little effect on extending the noise co-travel route and cannot achieve the effect of offsetting. Summary of the invention
[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by this patent application is how to provide a diesel engine exhaust pipe silencer with a simple structure, good noise reduction effect and easy use.
[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:
[0006] A diesel engine exhaust pipe silencer comprises a muffler housing, wherein the muffler housing comprises a cylinder and an air inlet end cover and an air outlet end cover fixedly mounted at both ends of the cylinder, an air inlet pipe is fixedly mounted on the air inlet end cover, and an air outlet pipe is fixedly mounted on the air outlet end cover;
[0007] The first partition, the second partition, the first counter plate and the second counter plate are fixedly installed in the cylinder, and the first partition, the second partition, the first counter plate and the second counter plate divide the inner cavity of the muffler shell into a first expansion chamber, a second expansion chamber, a third expansion chamber, a fourth expansion chamber and an air outlet chamber. The two ends of the air outlet pipe are connected and the end of the air outlet pipe located in the air outlet chamber is provided with an air outlet hole; the two ends of the air inlet pipe are through-set and the air inlet pipe passes through the first expansion chamber and the first partition and extends into the second expansion chamber, the part of the air inlet pipe located in the first expansion chamber is provided with an air inlet hole, and the second partition is provided with air vents in the circumference; the first counter plate and the second counter plate are respectively provided with a plurality of first punching holes and a plurality of second punching holes, and the first punching holes and the second punching holes are staggered.
[0008] In this way, the intake pipe is connected to the diesel engine exhaust pipe through a flange. The exhaust gas discharged from the diesel engine enters the first expansion chamber and the second expansion chamber through the intake pipe. The exhaust gas in the second expansion chamber reaches the third expansion chamber through the ventilation holes in the circumferential direction of the second partition plate. The exhaust gas in the third expansion chamber reaches the air outlet chamber after passing through the first impact plate and the second impact plate, and then enters the outlet pipe through the air outlet holes on the outlet pipe and is discharged.
[0009] Through the settings of the first expansion chamber, the second expansion chamber, the third expansion chamber, the fourth expansion chamber and the air outlet chamber, different expansion and sound-absorbing chamber are formed, increasing the sound-absorbing effect. The ventilation holes, the first punching holes and the second punching holes are arranged in a staggered manner, extending the flow path of the exhaust gas and further achieving the sound-absorbing effect.
[0010] Among them, the part of the intake pipe located in the first expansion chamber is arranged in a V-shaped bend.
[0011] Among them, basalt rock wool cloth is fixedly installed on the inner side wall of the second expansion chamber.
[0012] Among them, a sound-absorbing pipe is fixedly installed on the first partition plate. A number of sound-absorbing holes are provided in the parts of the sound-absorbing pipe located in the first expansion chamber and the second expansion chamber, and the end of the sound-absorbing pipe located in the second expansion chamber is closed.
[0013] Among them, both the first impact plate and the second impact plate include a disc part and a ring part. The ring part is fixedly installed on the concave side of the disc part. The first punching hole and the second punching hole are respectively arranged on the disc part of the first impact plate and the ring part of the second impact plate.
[0014] In summary, the diesel engine exhaust pipe sound-absorbing device of the present invention has the advantages of simple structure, good noise reduction effect and convenient use. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic structural diagram of a diesel engine exhaust pipe sound-absorbing device according to the present invention.
[0016] Figure 2 For Figure 1 the internal structural schematic diagram.
[0017] Figure 3 It is a schematic diagram of the first impact plate and the second impact plate. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0018] The present utility model will be further described in detail below with reference to the accompanying drawings. In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by orientation words such as "upper, lower" and "top, bottom" is usually based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it should not be construed as a limitation on the protection scope of the present utility model; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.
[0019] As Figures 1-3 shown, a silencing device for a diesel engine exhaust pipe includes a muffler housing, the muffler housing includes a cylinder body 1 and an intake end cover 2 and an exhaust end cover 3 fixedly installed at both ends of the cylinder body. An intake pipe 4 is fixedly installed on the intake end cover, and an exhaust pipe 5 is fixedly installed on the exhaust end cover;
[0020] A first partition plate 6, a second partition plate 7, a first counterflow plate 8 and a second counterflow plate 9 are fixedly installed inside the cylinder body. The first partition plate, the second partition plate, the first counterflow plate and the second counterflow plate divide the inner cavity of the muffler housing into a first expansion cavity 11, a second expansion cavity 12, a third expansion cavity 13, a fourth expansion cavity 14 and an exhaust cavity 15. Both ends of the exhaust pipe are through, and exhaust holes 16 are provided at the end of the exhaust pipe located in the exhaust cavity; both ends of the intake pipe are penetrated, and the intake pipe passes through the first expansion cavity and the first partition plate and extends into the second expansion cavity. Intake holes 17 are provided in the part of the intake pipe located in the first expansion cavity, and ventilation holes 18 are provided in the circumferential direction of the second partition plate; a number of first punching holes 19 and a number of second punching holes 20 are respectively provided on the first counterflow plate and the second counterflow plate, and the first punching holes and the second punching holes are arranged in a staggered manner.
[0021] In this way, the intake pipe is connected to the diesel engine exhaust pipe through a flange. The exhaust gas discharged from the diesel engine enters the first expansion cavity and the second expansion cavity through the intake pipe. The exhaust gas in the second expansion cavity reaches the third expansion cavity through the ventilation holes in the circumferential direction of the second partition plate. The exhaust gas in the third expansion cavity reaches the exhaust cavity after passing through the first counterflow plate and the second counterflow plate, and enters the exhaust pipe through the exhaust holes on the exhaust pipe and then is discharged.
[0022] Through the settings of the first expansion cavity, the second expansion cavity, the third expansion cavity, the fourth expansion cavity and the exhaust cavity, different expansion silencing chambers are formed, increasing the silencing effect. When the ventilation holes, the first punching holes and the second punching holes are arranged in a staggered manner, the flow path of the exhaust gas is extended, further achieving the silencing effect.
[0023] During implementation, the part of the intake pipe located in the first expansion chamber is arranged in a V-shaped bend. The intake pipe is arranged in a V-shaped bend, so that when the waste gas is discharged through the intake holes, the flow direction of the waste gas changes, and the waste gas can collide with each other and with the cylinder body more, improving the sound absorption effect.
[0024] During implementation, a basalt rock wool cloth 21 is fixedly installed on the inner side wall of the second expansion chamber. It can absorb vibration and buffer sound waves.
[0025] During implementation, a sound-absorbing pipe 22 is fixedly installed on the first partition plate. A plurality of sound-absorbing holes 23 are opened in the part of the sound-absorbing pipe located in the first expansion chamber and the second expansion chamber, and the end of the sound-absorbing pipe located in the second expansion chamber is closed. Through the arrangement of the sound-absorbing pipe, the waste gas in the first expansion chamber can enter the second expansion chamber better, decompress. At the same time, the end of the sound-absorbing pipe located in the second expansion chamber is closed, so that the waste gas is discharged circumferentially after passing through the sound-absorbing holes and then flows through the ventilation holes, further improving the sound absorption effect.
[0026] During implementation, both the first impact plate and the second impact plate include a disc part 24 and an annular part 25. The annular part is fixedly installed on the dug side of the disc part. The first punching hole and the second punching hole are respectively arranged on the disc part of the first impact plate and the annular part of the second impact plate.
[0027] In this way, both the first impact plate and the second impact plate include a disc part and an annular part. The annular part is arranged in a frustum shape, changing the flow direction of the waste gas, and further increasing the collision of the air flow before discharging from the cylinder body, thereby achieving a further sound absorption effect.
[0028] Finally, it should be noted that those skilled in the art can make various changes and modifications to the present utility model without departing from the spirit and scope of the present utility model. In this way, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalents, the present utility model is also intended to include these modifications and variations.
Claims
1. A silencing device for a diesel engine exhaust pipe, characterized in that, It includes a muffler housing, the muffler housing includes a cylinder body and an air inlet end cover and an air outlet end cover fixedly installed at both ends of the cylinder body, an air inlet pipe is fixedly installed on the air inlet end cover, and an air outlet pipe is fixedly installed on the air outlet end cover; A first partition plate, a second partition plate, a first counterflow plate and a second counterflow plate are fixedly installed in the cylinder body. The first partition plate, the second partition plate, the first counterflow plate and the second counterflow plate divide the inner cavity of the muffler housing into a first expansion cavity, a second expansion cavity, a third expansion cavity, a fourth expansion cavity and an air outlet cavity. Both ends of the air outlet pipe are penetrated, and air outlet holes are provided at the end of the air outlet pipe located in the air outlet cavity; both ends of the air inlet pipe are penetrated, and the air inlet pipe passes through the first expansion cavity and the first partition plate and extends into the second expansion cavity. Air inlet holes are provided in the part of the air inlet pipe located in the first expansion cavity, and ventilation holes are provided in the circumferential direction of the second partition plate; a number of first punching holes and a number of second punching holes are respectively provided on the first counterflow plate and the second counterflow plate, and the first punching holes and the second punching holes are arranged in a staggered manner.
2. The silencing device for a diesel engine exhaust pipe according to claim 1, characterized in that, The part of the air inlet pipe located in the first expansion cavity is bent in a V shape.
3. The silencing device for a diesel engine exhaust pipe according to claim 2, characterized in that, A basalt rock wool cloth is fixedly installed on the inner side wall of the second expansion cavity.
4. A silencing device for a diesel engine exhaust pipe according to claim 1, characterized in that, A silencing pipe is fixedly installed on the first partition plate. A number of silencing holes are provided in the parts of the silencing pipe located in the first expansion cavity and the second expansion cavity, and the end of the silencing pipe located in the second expansion cavity is closed.
5. The silencing device for a diesel engine exhaust pipe according to claim 1, characterized in that Both the first counterflow plate and the second counterflow plate include a disc part and an annular part. The annular part is fixedly installed on the excavated side of the disc part. The first punching holes and the second punching holes are respectively arranged on the disc part of the first counterflow plate and the annular part of the second counterflow plate.