CN112483217B - Exhaust silencer for engineering machinery and silencing method - Google Patents

Exhaust silencer for engineering machinery and silencing method Download PDF

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Publication number
CN112483217B
CN112483217B CN202011414218.3A CN202011414218A CN112483217B CN 112483217 B CN112483217 B CN 112483217B CN 202011414218 A CN202011414218 A CN 202011414218A CN 112483217 B CN112483217 B CN 112483217B
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China
Prior art keywords
plate
shaped
box body
external box
flange
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CN202011414218.3A
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Chinese (zh)
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CN112483217A (en
Inventor
龙以志
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Ningbo Yueheshan Intelligent Technology Co ltd
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Ningbo Yueheshan Intelligent Technology Co ltd
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Publication of CN112483217A publication Critical patent/CN112483217A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/10—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling in combination with sound-absorbing materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/082—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling the gases passing through porous members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
    • F01N13/1844—Mechanical joints
    • F01N13/1855—Mechanical joints the connection being realised by using bolts, screws, rivets or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/12—Tubes being corrugated

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)

Abstract

The invention discloses an exhaust silencer for engineering machinery, and belongs to the technical field of engineering machinery. The invention comprises an external mechanism, wherein the inside of the external mechanism is connected with a noise elimination mechanism in a sliding manner, the external mechanism comprises an external box body, one side surface of the external box body is fixedly communicated with a connecting component, the other side surface of the external box body is fixedly communicated with a tail gas exhaust pipe, strip-shaped plates are fixedly arranged on the inner top surface and the inner bottom surface of the external box body, a T-shaped chute is arranged inside each strip-shaped plate, positioning components are fixedly arranged at the front ends of the two side surfaces of the external box body, the bottom end of the front side of the external box body is rotatably connected with an external box door through two hinges, fixed side plates are fixedly arranged at the top ends of the two side surfaces of the external box door, a positioning hole is arranged inside each fixed side plate, and each positioning component comprises an L-shaped support. The invention can better absorb the noise through the silencing cotton plate, thereby greatly improving the silencing effect.

Description

Exhaust silencer for engineering machinery and silencing method
Technical Field
The invention belongs to the technical field of engineering machinery, and particularly relates to an exhaust silencer for engineering machinery.
Background
The silencer is a device which allows airflow to pass but can prevent and reduce sound transmission, and is widely applied to automobiles, particularly small and medium-sized engineering machines, so as to eliminate noise generated by engine exhaust. The traditional silencer is characterized in that soundproof cotton is placed in a pipe, and the noise is absorbed through the impact of gas on the soundproof cotton, so that the silencing effect is achieved. Traditional silencer is when using, because gaseous constantly directly assaults soundproof cotton, often leads to the problem that soundproof cotton damaged, and its life is shorter to traditional silencer is only through soundproof cotton noise absorption, and its noise reduction effect is not good, under the situation that the environmental requirement improves day by day, is difficult to satisfy the emission requirement that becomes stricter day by day. Therefore, the development of a silencer with lower noise reduction is of great significance, and aiming at the problems, the invention designs the exhaust silencer for the engineering machinery, so that the problems are solved.
Disclosure of Invention
The present invention is directed to an exhaust muffler for construction machinery, which solves the above-mentioned problems of the related art by designing a muffler mechanism.
In order to achieve the purpose, the invention provides the following technical scheme: an exhaust silencer for engineering machinery comprises an external mechanism, wherein a silencing mechanism is connected inside the external mechanism in a sliding manner;
the external mechanism comprises an external box body, a connecting assembly is fixedly communicated with one side face of the external box body, a tail gas exhaust pipe is fixedly communicated with the other side face of the external box body, strip-shaped plates are fixedly arranged on the inner top face and the inner bottom face of the external box body, a T-shaped chute is formed in each strip-shaped plate, a positioning assembly is fixedly arranged at the front ends of the two side faces of the external box body, the bottom end of the front side of the external box body is rotatably connected with an external box door through two hinges, fixed side plates are fixedly arranged at the top ends of the two side faces of the external box door, and a positioning hole is formed in each fixed side plate;
the positioning assembly comprises an L-shaped support, the L-shaped support is fixedly installed on the outer surface of the outer box body, a positioning column penetrates through the L-shaped support, a circular end plate is fixedly installed on one end face of the positioning column, a sleeve ring is fixedly sleeved in the middle of the positioning column, the circular end plate and the sleeve ring are located on two sides of the L-shaped support, a first spring is sleeved between the L-shaped support and the sleeve ring on the peripheral side face of the positioning column, and one end, far away from the circular end plate, of the positioning column is inserted into the positioning hole;
the silencing mechanism comprises a sliding assembly, one side of the sliding assembly is provided with a silencing cotton plate, and the silencing cotton plate is fixed through two clamping assemblies;
the sliding assembly comprises two transverse plates, a T-shaped sliding block matched with the T-shaped sliding groove is fixedly mounted on each transverse plate, two fixing columns penetrate through each transverse plate, a circular baffle is fixedly mounted at one end of each fixing column, an acoustical panel is fixedly mounted at the other end of each fixing column, a second spring is sleeved on the peripheral side of each fixing column and located between the transverse plate and the acoustical panel, and an acoustical hole is formed in the acoustical panel;
the clamping assembly comprises a U-shaped fixing frame, the U-shaped fixing frame is fixedly installed on the sound absorption plate, a limiting bolt is connected to the middle of the U-shaped fixing frame in a threaded mode, one end of the limiting bolt is connected with a clamping plate through a bearing, a guide column is fixedly installed on the surface of the clamping plate and located on the two sides of the limiting bolt, and one end, far away from the clamping plate, of the guide column penetrates through the inner wall of the U-shaped fixing frame and extends to the outer side of the U-shaped fixing frame.
As a preferred embodiment, the connection assembly includes a tail gas inlet pipe and a connection pipe, one end of the tail gas inlet pipe is fixedly communicated with the external box, a corrugated pipe is arranged between the tail gas inlet pipe and the connection pipe, one end of the tail gas inlet pipe, which is far away from the external box, is fixedly provided with a first connection flange, one end of the corrugated pipe is fixedly provided with a second connection flange, four first bolts are inserted into the first connection flange and the second connection flange, each first bolt is in threaded connection with a first nut, one end of the connection pipe is fixedly provided with a third connection flange, one end of the corrugated pipe, which is far away from the second connection flange, is fixedly provided with a fourth connection flange, four second bolts are inserted into the third connection flange and the fourth connection flange, and each second bolt is in threaded connection with a second nut, through setting up the bellows, can turn to fifth flange to be convenient for install it, improve the installation effect.
In a preferred embodiment, a fifth connecting flange is fixedly mounted at an end of the connecting pipe away from the third connecting flange, and the fifth connecting flange is connected with an engine exhaust pipe.
As a preferred embodiment, two mounting brackets are fixedly mounted at the top end of the outer box body, and the two mounting brackets are symmetrically arranged.
As a preferred embodiment, a matching hole has been seted up to the inside of "L" shape support, the reference column passes the inside matching hole of "L" shape support, the diameter of reference column is the same with the internal diameter of locating hole, and the week side of reference column and the inner wall of locating hole are all smooth, a terminal surface that circular end plate was kept away from to the reference column is the cambered surface, the cambered surface is smooth, fixed mounting has a pull ring on a terminal surface that the reference column was kept away from to circular end plate, the pull ring is the component of steel alloy material.
In a preferred embodiment, the two "T" shaped sliding blocks are respectively positioned inside the two "T" shaped sliding grooves, and the "T" shaped sliding blocks are in sliding fit with the "T" shaped sliding grooves.
As a preferred embodiment, two connecting blocks are fixedly mounted at the front end of one side face of the sound-absorbing plate, a handle is fixedly mounted on the two connecting blocks, two blocking rings are fixedly sleeved on the peripheral side face of the handle, an anti-skid pad is fixedly sleeved on the peripheral side face of the handle and positioned between the two blocking rings, and the anti-skid pad is a component made of rubber.
In a preferred embodiment, the inner ring of the bearing is fixedly connected with one end of the limit bolt, and the outer ring of the bearing is fixedly connected with one surface of the clamping plate.
As a preferred embodiment, two guide grooves matched with the guide posts are formed in the U-shaped fixing frame, the inner diameter of each guide groove is the same as the diameter of each guide post, and the peripheral side surfaces of the guide posts and the inner walls of the guide grooves are smooth.
Compared with the prior art, the exhaust muffler for the engineering machinery, provided by the invention, at least comprises the following beneficial effects:
1. the exhaust silencer for the engineering machinery is installed on a machine through the installation support, then is connected with the exhaust pipe of the engine through the fifth connecting flange, and can turn the fifth connecting flange by arranging the corrugated pipe, so that the exhaust silencer is convenient to install, and the installation effect is improved.
2. The engine tail gas enters the inside of the external box body through the connecting component, then the air flow generated by the engine tail gas collides with the silencing mechanism, the second spring contracts and shortens at the moment so as to buffer the air flow, in addition, when the air flow passes through the silencing cotton plate, the silencing cotton plate absorbs the noise so as to reduce a part of noise, in addition, the tail gas passing through the silencing cotton plate passes through the silencing hole and is finally released from the tail gas exhaust pipe, and the noise can be absorbed through the silencing cotton plate, so that the silencing effect is greatly improved.
3. According to the invention, the pull ring is pulled outwards, the pull ring drives the positioning column to move outwards, meanwhile, the first spring contracts and shortens, one end of the positioning column, which is far away from the circular end plate, is separated from the inside of the positioning hole, then the external box door is opened, then a worker holds the handle, completely pulls out the sliding assembly from the inside of the external box body, then places the sliding assembly completely pulled out from the inside of the external box body on the ground, and then screws the limiting bolt, so that the clamping plate does not clamp the silencing cotton plate any more, the silencing cotton plate is detached, and the silencing cotton plate is replaced or cleaned.
Drawings
Fig. 1 is a schematic structural view of an exhaust muffler for construction machinery;
FIG. 2 is a schematic view of the outer box door of the present invention after it is opened;
FIG. 3 is a front view of FIG. 2 of the present invention;
FIG. 4 is a schematic view of the structure of the external mechanism of the present invention;
FIG. 5 is a schematic view of a coupling assembly of the present invention;
FIG. 6 is a cross-sectional view of the positioning assembly of the present invention;
FIG. 7 is a schematic view of the muffler mechanism of the present invention;
FIG. 8 is a schematic structural view of another perspective of the muffling mechanism of the present invention;
FIG. 9 is a cross-sectional view of the muffling mechanism of the present invention;
FIG. 10 is a schematic view of the construction of the sliding assembly of the present invention;
FIG. 11 is a schematic view of a clamping assembly according to the present invention.
In the figure: 1. an external mechanism; 101. an outer case; 102. a connecting assembly; 1021. a tail gas inlet pipe; 1022. a connecting pipe; 1023. a bellows; 1024. a first connecting flange; 1025. a second connecting flange; 1026. a first bolt; 1027. a first nut; 1028. a third connecting flange; 1029. a fourth connecting flange; 1030. a second bolt; 1031. a second nut; 1032. a fifth connecting flange; 103. a tail gas exhaust pipe; 104. mounting a bracket; 105. a strip plate; 106. a T-shaped chute; 107. a positioning assembly; 1071. an "L" shaped bracket; 1072. a positioning column; 1073. a circular end plate; 1074. a collar; 1075. a first spring; 1076. a pull ring; 108. a hinge; 109. an outer box door; 110. fixing the side plate; 111. positioning holes; 2. a noise elimination mechanism; 3. a sliding assembly; 301. a transverse plate; 302. a T-shaped slider; 303. fixing a column; 304. a circular baffle; 305. a sound-absorbing panel; 306. a second spring; 307. a silencing hole; 308. a connection block; 309. a handle; 310. a blocking ring; 311. a non-slip mat; 4. a clamping assembly; 401. a U-shaped fixing frame; 402. a limit bolt; 403. a clamping plate; 404. a bearing; 405. a guide post; 5. a sound-deadening cotton plate.
Detailed Description
The present invention will be further described with reference to the following examples.
The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention. The conditions in the embodiments can be further adjusted according to specific conditions, and simple modifications of the method of the present invention based on the concept of the present invention are within the scope of the claimed invention.
Referring to fig. 1 to 11, the present invention provides an exhaust muffler for an engineering machine, including an external mechanism 1, wherein a muffler mechanism 2 is slidably connected to an inside of the external mechanism 1;
the external mechanism 1 comprises an external box body 101, a connecting assembly 102 is fixedly communicated with one side surface of the external box body 101, a tail gas exhaust pipe 103 is fixedly communicated with the other side surface of the external box body 101, strip-shaped plates 105 are fixedly arranged on the inner top surface and the inner bottom surface of the external box body 101, a T-shaped chute 106 is formed in each strip-shaped plate 105, positioning assemblies 107 are fixedly arranged at the front ends of the two side surfaces of the external box body 101, the bottom end of the front side of the external box body 101 is rotatably connected with an external box door 109 through two hinges 108, fixed side plates 110 are fixedly arranged at the top ends of the two side surfaces of the external box door 109, and a positioning hole 111 is formed in each fixed side plate 110;
the positioning assembly 107 comprises an L-shaped support 1071, the L-shaped support 1071 is fixedly mounted on the outer surface of the external box 101, a positioning post 1072 penetrates through the L-shaped support 1071, a circular end plate 1073 is fixedly mounted on one end surface of the positioning post 1072, a collar 1074 is fixedly sleeved in the middle of the positioning post 1072, the circular end plate 1073 and the collar 1074 are located on two sides of the L-shaped support 1071, a first spring 1075 is sleeved on the peripheral side surface of the positioning post 1072 and located between the L-shaped support 1071 and the collar 1074, and one end of the positioning post 1072, which is far away from the circular end plate 1073, is inserted into the positioning hole 111;
the silencing mechanism 2 comprises a sliding component 3, one side of the sliding component 3 is provided with a silencing cotton plate 5, and the silencing cotton plate 5 is fixed through two clamping components 4;
the sliding assembly 3 comprises two transverse plates 301, a T-shaped sliding block 302 matched with the T-shaped sliding groove 106 is fixedly mounted on each transverse plate 301, two fixing columns 303 penetrate through each transverse plate 301, a circular baffle 304 is fixedly mounted at one end of each fixing column 303, an acoustical panel 305 is fixedly mounted at the other end of each fixing column 303, a second spring 306 is sleeved on the peripheral side of each fixing column 303 and located between the transverse plate 301 and the acoustical panel 305, and an acoustical hole 307 is formed in the acoustical panel 305;
the clamping assembly 4 comprises a U-shaped fixing frame 401, the U-shaped fixing frame 401 is fixedly installed on the sound-absorbing plate 305, a limiting bolt 402 is connected to the middle of the U-shaped fixing frame 401 through a thread, one end of the limiting bolt 402 is connected with a clamping plate 403 through a bearing 404, a guide column 405 is fixedly installed on one surface of the clamping plate 403 and on two sides of the limiting bolt 402, and one end, far away from the clamping plate 403, of the guide column 405 penetrates through the inner wall of the U-shaped fixing frame 401 and extends to the outer side of the U-shaped fixing frame 401.
The connecting assembly 102 comprises a tail gas inlet pipe 1021 and a connecting pipe 1022, one end of the tail gas inlet pipe 1021 is fixedly communicated with the external box body 101, a corrugated pipe 1023 is arranged between the tail gas inlet pipe 1021 and the connecting pipe 1022, one end of the tail gas inlet pipe 1021, which is far away from the external box body 101, is fixedly provided with a first connecting flange 1024, one end of the corrugated pipe 1023 is fixedly provided with a second connecting flange 1025, four first bolts 1026 are inserted and connected onto the first connecting flange 1024 and the second connecting flange 1025, each first bolt 1026 is in threaded connection with a first nut 1027, one end of the connecting pipe 1022 is fixedly provided with a third connecting flange 1028, one end of the corrugated pipe 1023, which is far away from the second connecting flange 1025, is fixedly provided with a fourth connecting flange 1029, four second bolts 1030 are inserted and connected onto the third connecting flange 1028 and the fourth connecting flange 1029, each second bolt 1030 is in threaded connection with a second nut 1031, through setting up bellows 1023, can turn to fifth connecting flange 1032 to be convenient for install it, improve the installation effectiveness.
A fifth connecting flange 1032 is fixedly mounted at one end of the connecting pipe 1022 far away from the third connecting flange 1028, and the fifth connecting flange 1032 is connected with an engine exhaust pipe.
Two mounting brackets 104 are fixedly mounted at the top end of the external box 101, and the two mounting brackets 104 are symmetrically arranged.
A matching hole has been seted up to "L" shape support 1071's inside, reference column 1072 passes the inside matching hole of "L" shape support 1071, the diameter of reference column 1072 is the same with locating hole 111's internal diameter, and the week side of reference column 1072 is all smooth with locating hole 111's inner wall, a terminal surface that circular end plate 1073 was kept away from to reference column 1072 is the cambered surface, the cambered surface is smooth, fixed mounting has a pull ring 1076 on the terminal surface that circular end plate 1073 kept away from reference column 1072, pull ring 1076 is the component of steel alloy material.
The two "T" shaped sliding blocks 302 are respectively located inside the two "T" shaped sliding grooves 106, and the "T" shaped sliding blocks 302 are in sliding fit with the "T" shaped sliding grooves 106.
Two connecting blocks 308 are fixedly installed at the front end of one side face of the sound-absorbing board 305, a handle 309 is fixedly installed on the two connecting blocks 308, two blocking rings 310 are fixedly sleeved on the peripheral side face of the handle 309, an anti-skid pad 311 is fixedly sleeved between the two blocking rings 310 on the peripheral side face of the handle 309, and the anti-skid pad 311 is a rubber component.
The inner ring of the bearing 404 is fixedly connected with one end of the limit bolt 402, and the outer ring of the bearing 404 is fixedly connected with one surface of the clamping plate 403.
Two guide grooves matched with the guide posts 405 are formed in the U-shaped fixing frame 401, the inner diameter of each guide groove is the same as the diameter of each guide post 405, and the peripheral side surfaces of the guide posts 405 and the inner walls of the guide grooves are smooth.
When the exhaust of the engine needs to be silenced, firstly, a worker installs the exhaust silencer for the engineering machinery on the machine through the mounting bracket 104, then the exhaust silencer is connected with the exhaust pipe of the engine through the fifth connecting flange 1032, the fifth connecting flange 1032 can be turned by arranging the corrugated pipe 1023, so that the installation of the exhaust silencer is facilitated, the installation effect is improved, when the fifth connecting flange 1032 is connected with the exhaust pipe of the engine, the exhaust gas of the engine enters the inside of the external box 101 through the connecting component 102, then the airflow generated by the exhaust gas of the engine collides the silencing mechanism 2, at this time, the second spring 306 is contracted and shortened, so that the airflow is buffered, in addition, when the airflow passes through the silencing cotton plate 5, the silencing cotton plate 5 absorbs the noise, so that a part of the noise is reduced, in addition, the exhaust gas passing through the silencing cotton plate 5 passes through the silencing hole 307, finally, the exhaust gas is released from the exhaust gas pipe 103, the noise can be absorbed by the silencing cotton plate 5, so that the silencing effect is greatly improved, when the silencing cotton plate 5 needs to be replaced, the pull ring 1076 is pulled outwards, the pull ring 1076 drives the positioning column 1072 to move outwards, meanwhile, the first spring 1075 contracts and shortens, one end of the positioning column 1072, which is far away from the circular end plate 1073, is separated from the inside of the positioning hole 111, then the outer box door 109 can be opened, then a worker holds the handle 309 to completely pull out the sliding assembly 3 from the inside of the outer box body 101, then the sliding assembly 3 completely pulled out from the inside of the outer box body 101 is placed on the ground, then the limiting bolt 402 is screwed, so that the clamping plate 403 no longer clamps the silencing cotton plate 5, the silencing cotton plate 5 is detached, the silencing cotton plate 5 is replaced or cleaned, the silencing cotton plate 5 can be simply and conveniently detached from the silencing plate 305, thereby very big improvement the change or the clearance efficiency of amortization cotton board 5, easily market.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (8)

1. An exhaust muffler for construction machinery, characterized in that: the noise-reducing device comprises an external mechanism (1), wherein a noise-reducing mechanism (2) is connected to the inside of the external mechanism (1) in a sliding manner;
the external mechanism (1) comprises an external box body (101), one side surface of the external box body (101) is fixedly communicated with a connecting component (102), the other side surface of the external box body (101) is fixedly communicated with a tail gas exhaust pipe (103), a strip-shaped plate (105) is fixedly arranged on the inner top surface and the inner bottom surface of the outer box body (101), a T-shaped sliding groove (106) is arranged inside each strip-shaped plate (105), the front ends of the two side surfaces of the external box body (101) are fixedly provided with a positioning component (107), the bottom end of the front side of the outer box body (101) is rotationally connected with an outer box door (109) through two hinges (108), the top ends of two side surfaces of the external box door (109) are fixedly provided with a fixed side plate (110), and a positioning hole (111) is formed in the fixed side plate (110);
the positioning assembly (107) comprises an L-shaped support (1071), the L-shaped support (1071) is fixedly installed on the outer surface of the external box body (101), a positioning column (1072) penetrates through the L-shaped support (1071), a circular end plate (1073) is fixedly installed on one end face of the positioning column (1072), a lantern ring (1074) is fixedly connected to the middle of the positioning column (1072) in a sleeved mode, the circular end plate (1073) and the lantern ring (1074) are located on two sides of the L-shaped support (1071), a first spring (1075) is sleeved on the peripheral side face of the positioning column (1072) and located between the L-shaped support (1071) and the lantern ring (1074), and one end, far away from the circular end plate (1073), of the positioning column (1072) is connected to the inside of the positioning hole (111) in a sleeved mode;
the noise elimination mechanism (2) comprises a sliding assembly (3), one side of the sliding assembly (3) is provided with a noise elimination cotton plate (5), and the noise elimination cotton plate (5) is fixed through two clamping assemblies (4);
the sliding assembly (3) comprises two transverse plates (301), a T-shaped sliding block (302) matched with a T-shaped sliding groove (106) is fixedly installed on each transverse plate (301), two fixing columns (303) penetrate through each transverse plate (301), a circular baffle (304) is fixedly installed at one end of each fixing column (303), an acoustical panel (305) is fixedly installed at the other end of each fixing column (303), a second spring (306) is sleeved on the peripheral side surface of each fixing column (303) and located between the transverse plate (301) and the acoustical panel (305), and an acoustical hole (307) is formed in the acoustical panel (305);
the clamping assembly (4) comprises a U-shaped fixing frame (401), the U-shaped fixing frame (401) is fixedly mounted on the sound-absorbing plate (305), a limiting bolt (402) is in threaded connection with the middle of the U-shaped fixing frame (401), one end of the limiting bolt (402) is connected with a clamping plate (403) through a bearing (404), a guide column (405) is fixedly mounted on one surface of the clamping plate (403) and located on two sides of the limiting bolt (402), and one end, far away from the clamping plate (403), of the guide column (405) penetrates through the inner wall of the U-shaped fixing frame (401) and extends to the outer side of the U-shaped fixing frame (401).
2. The exhaust muffler for the engineering machinery as claimed in claim 1, wherein the connection assembly (102) comprises an exhaust gas inlet pipe (1021) and a connection pipe (1022), one end of the exhaust gas inlet pipe (1021) is fixedly connected with the external box (101), a corrugated pipe (1023) is arranged between the exhaust gas inlet pipe (1021) and the connection pipe (1022), a first connection flange (1024) is fixedly installed at one end of the exhaust gas inlet pipe (1021) far away from the external box (101), a second connection flange (1025) is fixedly installed at one end of the corrugated pipe (1023), four first bolts (1026) are inserted into the first connection flange (1024) and the second connection flange (1025), a first nut (1027) is in threaded connection with each first bolt (1026), and a third connection flange (1028) is fixedly installed at one end of the connection pipe (1022), bellows (1023) keep away from the one end fixed mounting of second flange (1025) has a fourth flange (1029), it has four second bolt (1030) to peg graft on third flange (1028) and fourth flange (1029), every equal threaded connection has a second nut (1031) on second bolt (1030).
3. The exhaust muffler for the construction machine as recited in claim 2, wherein a fifth connecting flange (1032) is fixedly mounted at an end of the connecting pipe (1022) away from the third connecting flange (1028), and the fifth connecting flange (1032) is connected to an exhaust pipe of the engine.
4. The exhaust muffler for construction machinery according to claim 1, wherein two mounting brackets (104) are fixedly mounted at a top end of the outer box (101), and the two mounting brackets (104) are symmetrically arranged.
5. The exhaust muffler for the engineering machinery, according to claim 1, wherein a matching hole is formed in the L-shaped support (1071), the positioning column (1072) penetrates through the matching hole in the L-shaped support (1071), the diameter of the positioning column (1072) is the same as the inner diameter of the positioning hole (111), the circumferential side surface of the positioning column (1072) and the inner wall of the positioning hole (111) are both smooth, an end surface of the positioning column (1072) away from the circular end plate (1073) is an arc surface, the arc surface is smooth, a pull ring (1076) is fixedly mounted on an end surface of the circular end plate (1073) away from the positioning column (1072), and the pull ring (1076) is a steel alloy component.
6. The exhaust muffler for the construction machinery as recited in claim 1, wherein the two "T" -shaped sliders (302) are respectively located inside the two "T" -shaped sliding grooves (106), and the "T" -shaped sliders (302) are slidably engaged with the "T" -shaped sliding grooves (106).
7. The exhaust muffler for the engineering machinery as claimed in claim 1, wherein the sound-absorbing plate (305) has two connecting blocks (308) fixedly mounted at the front end of one side, a handle (309) is fixedly mounted on the two connecting blocks (308), two blocking rings (310) are fixedly sleeved on the peripheral side of the handle (309), a non-slip mat (311) is fixedly sleeved on the peripheral side of the handle (309) and between the two blocking rings (310), and the non-slip mat (311) is a rubber member.
8. The exhaust muffler for construction machinery according to claim 1, wherein the inner ring of the bearing (404) is fixedly connected to one end of a limit bolt (402), and the outer ring of the bearing (404) is fixedly connected to one surface of the clamping plate (403); two guide grooves matched with the guide columns (405) are formed in the U-shaped fixing frame (401), the inner diameters of the guide grooves are the same as the diameters of the guide columns (405), and the peripheral side faces of the guide columns (405) and the inner walls of the guide grooves are smooth.
CN202011414218.3A 2020-12-07 2020-12-07 Exhaust silencer for engineering machinery and silencing method Active CN112483217B (en)

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CN116787101B (en) * 2023-08-25 2024-01-16 达必温汽车零部件(太仓)有限公司 Automatic feeding equipment for silencing cotton

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CN210396850U (en) * 2019-07-11 2020-04-24 佛山市秦跃鑫金属制造有限公司 Car silencer convenient to renew cartridge more
CN210509523U (en) * 2019-08-14 2020-05-12 雷海涛 Air compressor machine noise eliminator for environmental protection construction

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Publication number Priority date Publication date Assignee Title
KR20020032683A (en) * 2000-10-26 2002-05-04 이계안 Variable offset exhaust muffler for vehicles
CN201090270Y (en) * 2007-11-06 2008-07-23 浙江真空设备集团有限公司 Gap type composite silencer
CN203532005U (en) * 2013-11-08 2014-04-09 荆州市江汉众力实业有限公司 Engine silencer used on fracturing equipment
CN105888803A (en) * 2016-05-30 2016-08-24 浙江汇豪机械制造有限公司 Device for exhausting and noise lowering of generator set
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CN210396850U (en) * 2019-07-11 2020-04-24 佛山市秦跃鑫金属制造有限公司 Car silencer convenient to renew cartridge more
CN210509523U (en) * 2019-08-14 2020-05-12 雷海涛 Air compressor machine noise eliminator for environmental protection construction

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