CN215007487U

CN215007487U - Engineering machine tool silencer

Info

Publication number: CN215007487U
Application number: CN202120866461.2U
Authority: CN
Inventors: 蒋剑强; 王锡良; 薛峰
Original assignee: Jiangsu Xuncheng Machinery Co ltd
Current assignee: Jiangsu Xuncheng Machinery Co ltd
Priority date: 2021-04-25
Filing date: 2021-04-25
Publication date: 2021-12-03
Anticipated expiration: 2031-04-25

Abstract

The utility model discloses an engineering machinery muffler, which comprises a cylinder body, an air inlet end cover and an air outlet end cover, wherein the air inlet end cover and the air outlet end cover are plugged at two ends of the cylinder body, a first clapboard and a second clapboard are arranged in the cylinder body, the inner cavity of the cylinder body is divided into an anechoic chamber, a first expansion chamber and a second expansion chamber, an air inlet pipe is inserted in the air inlet end cover, one end of the air inlet pipe passes through the first clapboard and then extends into the first expansion chamber, an air outlet pipe is inserted in the air outlet end cover, a communicating pipe and an air inlet pipe are arranged on the second clapboard, the communicating pipe and the air outlet pipe are coaxially arranged, a silencing passage with an S-shaped section is arranged in the silencing chamber in a partitioning mode, silencing cotton is arranged in the silencing passage, the first partition plate is provided with a through pipe, one end of the through pipe penetrates through the second partition plate and then extends into the second expansion chamber, the air inlet pipe and the side wall of the through pipe are provided with a plurality of through holes, and two ends of the silencing passage are communicated with the air inlet pipe and the through pipe respectively. The utility model discloses an engineering machine tool silencer has compromise the noise elimination requirement of low frequency and high frequency, and the air flow resistance is little.

Description

Engineering machine tool silencer

Technical Field

The utility model relates to an apparatus technical field of making an uproar falls in the noise elimination, especially, relates to an engineering machine tool silencer.

Background

The muffler is a device which can effectively prevent or reduce the sound energy from transmitting outwards while allowing the air flow to pass through, and is mainly used for noise control of an air inlet pipeline, an air exhaust pipeline or a ventilation pipeline of engineering mechanical equipment.

At present, a silencer for engineering machinery is single in structure, the low-frequency and high-frequency silencing requirements cannot be better met, and a common expansion silencer can form large flow resistance in a pipeline when air circulates in an air vent pipeline, exhaust backpressure is increased, and energy consumption of the engineering machinery is improved.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: in order to overcome the defects in the prior art, the engineering machinery muffler which can meet the requirements of low-frequency and high-frequency noise elimination and has small air flow resistance is provided.

The utility model provides a technical scheme that its technical problem adopted is: a muffler for engineering machinery comprises a cylinder body, an air inlet end cover and an air outlet end cover, wherein the air inlet end cover and the air outlet end cover are plugged at two opposite ends of the cylinder body, a first partition board close to the air inlet end cover and a second partition board close to the air outlet end cover are arranged in the cylinder body, an inner cavity of the cylinder body is sequentially divided into a muffling chamber, a first expansion chamber and a second expansion chamber along the direction from the air inlet end cover to the air outlet end cover, an air inlet pipe is inserted into the air inlet end cover, one end of the air inlet pipe penetrates through the first partition board and then extends into the first expansion chamber, an air outlet pipe is inserted into the air outlet end cover, a communicating pipe is arranged on the second partition board, the air inlet pipe, the communicating pipe and the air outlet pipe are coaxially arranged, a muffling channel with an S-shaped section is arranged in the muffling channel, muffling cotton is arranged in the muffling channel, and a through pipe is arranged on the first partition board, one end of the through pipe penetrates through the second partition plate and then extends into the second expansion chamber, a plurality of through holes are formed in the air inlet pipe and the side wall of the through pipe, and two ends of the silencing passage are communicated with the air inlet pipe and the through pipe respectively.

Furthermore, a first sleeve is installed on the air inlet end cover, the first sleeve is sleeved outside the air inlet pipe, a second sleeve is installed on the first partition plate, the second sleeve is sleeved outside the first sleeve, gaps are formed between one end of the first sleeve and the first partition plate and between one end of the second sleeve and the air inlet end cover, and the silencing channel is formed by a space between the cylinder and the second sleeve, a space between the second sleeve and the first sleeve and a space between the first sleeve and the air inlet pipe.

Further, the central axis of the through pipe is parallel to the axis of the cylinder, and the through pipe is arranged on one side, away from the first sleeve, of the second sleeve.

Further, the noise reduction cotton is mounted on the inner wall of the first sleeve.

Further, the air inlet end cover is detachably connected with the cylinder, and the first sleeve is detachably connected with the air inlet end cover.

Further, a sealing element is clamped between the air inlet end cover and the cylinder body.

Further, the barrel is the cavity tubular structure that both ends link up, the intake pipe with the coaxial setting of barrel.

Further, engineering machine tool silencer still includes the connecting pipe of admitting air and the connecting pipe of giving vent to anger, the connecting pipe of admitting air with intake-tube connection, the connecting pipe of giving vent to anger with the outlet duct is connected, the connecting pipe of admitting air with all install the fixed block on the connecting pipe of giving vent to anger.

The utility model has the advantages that: the utility model provides an engineering machine tool silencer has the cross-section sudden change of a plurality of inflation and contractions, effectively eliminate in, low-frequency noise, and through setting up the amortization cotton, effectively eliminate in, high-frequency noise, compromise the noise elimination requirement of low frequency and high frequency, the noise elimination passageway of "S" shape has further played the noise reduction effect, in addition, the intake pipe, communicating pipe and the coaxial setting of outlet duct three have reduced the air flow resistance to a certain extent, thereby engineering machine tool' S power consumption has been reduced, convenient to popularize and use.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of a muffler for construction machinery according to the present invention.

In the figure: 1. the silencer comprises a cylinder body, 11, a first partition plate, 111, a through pipe, 12, a second partition plate, 121, a communicating pipe, 13, a silencing chamber, 131, a silencing channel, 132, silencing cotton, 14, a first expansion chamber, 15, a second expansion chamber, 2, an air inlet end cover, 21, an air inlet pipe, 211, a through hole, 22, a first sleeve pipe, 23, a second sleeve pipe, 24, a gap, 201, a sealing element, 3, an air outlet end cover, 31, an air outlet pipe, 4, an air inlet connecting pipe, 5, an air outlet connecting pipe, 6 and a fixing block.

Detailed Description

The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and merely illustrates the basic structure of the present invention in a schematic manner, and therefore it shows only the constitution related to the present invention.

Referring to fig. 1, the utility model provides a muffler for engineering machinery, which comprises a cylinder body 1, an air inlet cover 2 and an air outlet cover 3 which are sealed at two opposite ends of the cylinder body 1, a first partition board 11 which is close to the air inlet cover 2 and a second partition board 12 which is close to the air outlet cover 3 are installed in the cylinder body 1, the inner cavity of the cylinder body 1 is sequentially divided into a muffling chamber 13, a first expansion chamber 14 and a second expansion chamber 15 along the direction from the air inlet cover 2 to the air outlet cover 3, an air inlet pipe 21 is inserted in the air inlet cover 2, one end of the air inlet pipe 21 extends into the first expansion chamber 14 after passing through the first partition board 11, an air outlet pipe 31 is inserted in the air outlet cover 3, a communicating pipe 121 is installed on the second partition board 12, the air inlet pipe 21, the communicating pipe 121 and the air outlet pipe 31 are coaxially arranged, a muffling channel 131 with an S-shaped section is arranged in the muffling channel 13, muffling cotton 132 is arranged in the muffling channel 131, the first partition plate 11 is provided with a through pipe 111, one end of the through pipe 111 passes through the second partition plate 12 and then extends into the second expansion chamber 15, the side walls of the air inlet pipe 21 and the through pipe 111 are provided with a plurality of through holes 211, and two ends of the noise elimination channel 131 are respectively communicated with the air inlet pipe 21 and the through pipe 111.

The utility model discloses an engineering machine tool silencer because intake pipe 21 runs through first baffle 11, communicating pipe 121 runs through second baffle 12, and outlet duct 31 runs through the end cover 3 of giving vent to anger to and run through siphunculus 111 and link up first baffle 11 and second baffle 12 simultaneously, so just formed the cross-section sudden change of a plurality of expansions and contractions, can cause the sudden change of acoustic impedance, can take place reflection and interference when the sound wave is wherein transmitting, can effectively eliminate well, low frequency noise. In addition, the air inlet pipe 21 and the through hole 211 on the through pipe 111 can play an effective noise reduction function. The sound energy entering the silencing channel 131 through the through hole 211 of the air inlet pipe 21 increases the area of the channel wall of the silencing channel 131 and the noise due to the S-shaped structure of the silencing channel 131, so that the sound energy is fully converted into heat energy, and the silencing effect is improved. Meanwhile, the silencing cotton 132 in the silencing channel 131 has middle and high frequency silencing efficiency. Further, the air inlet pipe 21, the communicating pipe 121 and the air outlet pipe 31 are coaxially arranged, so that air flow resistance is reduced to a certain extent, and energy consumption of the engineering machinery is reduced.

Specifically, a first sleeve 22 is installed on the air inlet end cover 2, the first sleeve 22 is sleeved on the outside of the air inlet pipe 21, a second sleeve 23 is installed on the first partition plate 11, the second sleeve 23 is sleeved on the outside of the first sleeve 22, gaps 24 are formed between one end of the first sleeve 22 and the first partition plate 11 and between one end of the second sleeve 23 and the air inlet end cover 2, and the noise elimination channel 131 is formed by a space between the cylinder body 1 and the second sleeve 23, a space between the second sleeve 23 and the first sleeve 22, and a space between the first sleeve 22 and the air inlet pipe 21.

The central axis of the through pipe 111 is parallel to the axis of the cylinder 1, and the through pipe 111 is disposed on the side of the second sleeve 23 away from the first sleeve 22.

In this embodiment, the sound-deadening cotton 132 is attached to the inner wall of the first sleeve 22. Thus, when the air flow enters the silencing passage 131 through the through hole 211 of the air inlet pipe 21, the air flow directly collides with the silencing cotton 132, so that part of the sound is absorbed, and the noise reduction function is performed.

In addition, the air inlet end cover 2 is detachably connected with the cylinder body 1, and the first sleeve 22 is detachably connected with the air inlet end cover 2. After long-time use, the silencing cotton 132 can be damaged due to the collision of the exhaust gas, at this time, the user can detach the air inlet end cover 2 from one side of the cylinder 1, and then detach the silencing cotton 132 from the first sleeve 22 for replacement. It can be understood that the connection between the air inlet cover 2 and the barrel 1 and the connection between the first sleeve 11 and the air inlet cover 2 can be in a detachable manner such as a threaded connection, a snap connection, etc., and is not limited herein. In addition, the air inlet pipe 21 is slidable relative to the first partition plate 11, so that when the air inlet end cover 2 is detached, the first sleeve 22 can be separated from the first partition plate 11, and a sealing gasket (not shown) is further installed at the joint of the air inlet pipe 21 and the first partition plate 11, so as to ensure the sealing of the joint when the air inlet pipe 21 is connected with the first partition plate 11.

In order to avoid leakage of exhaust gas, a seal 201 is interposed between the intake end cover 2 and the cylinder 1. It is understood that the seal 201 is a rubber ring or a silicone ring.

In a specific embodiment, the cylinder 1 is a hollow cylindrical structure with two ends penetrating, and the air inlet pipe 21 is arranged coaxially with the cylinder 1.

The utility model discloses an engineering machine tool silencer still includes inlet connection 4 and the connecting pipe 5 of giving vent to anger, and inlet connection 4 and intake-tube 21 are connected, and the connecting pipe 5 of giving vent to anger is connected with outlet duct 31. When the air inlet connecting pipe is used, one end of the air inlet connecting pipe 4, which is far away from the air inlet pipe 21, is connected with an air outlet of engineering machinery, and the air outlet connecting pipe 5 is used for exhausting air. Further, all install fixed block 6 on connecting pipe 4 and the connecting pipe 5 of giving vent to anger of admitting air, fixed block 6 is used for with silencer fixed mounting on engineering machine tool.

The utility model provides an engineering machine tool silencer, the cross-section sudden change of a plurality of inflation and contractions has, effectively eliminate in, low-frequency noise, and through setting up amortization cotton 132, effectively eliminate in, high-frequency noise, the noise elimination requirement of low frequency and high frequency has been taken into account, the noise elimination passageway 131 of "S" shape has further played the noise reduction effect, in addition, intake pipe 21, communicating pipe 121 and the coaxial setting of 31 three of outlet duct, the air flow resistance has been reduced to a certain extent, thereby engineering machine tool' S power consumption has been reduced, and the convenience is popularized and used.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. An engineering machine tool silencer which is characterized in that: the silencer comprises a cylinder body, an air inlet end cover and an air outlet end cover, wherein the air inlet end cover and the air outlet end cover are plugged at two opposite ends of the cylinder body, a first partition board close to the air inlet end cover and a second partition board close to the air outlet end cover are arranged in the cylinder body, an inner cavity of the cylinder body is sequentially divided into a silencing chamber, a first expansion chamber and a second expansion chamber along the direction from the air inlet end cover to the air outlet end cover, an air inlet pipe is inserted into the air inlet end cover, one end of the air inlet pipe penetrates through the first partition board and then extends into the first expansion chamber, an air outlet pipe is inserted into the air outlet end cover, a communicating pipe is arranged on the second partition board, the air inlet pipe, the communicating pipe and the air outlet pipe are coaxially arranged, a silencing passage with an S-shaped section is arranged in the silencing chamber, silencing cotton is arranged in the silencing passage, a through pipe is arranged on the first partition board, one end of the through pipe penetrates through the second partition board and then extends into the second expansion chamber, the side walls of the air inlet pipe and the through pipe are provided with a plurality of through holes, and two ends of the silencing passage are respectively communicated with the air inlet pipe and the through pipe.

2. The muffler of working machinery according to claim 1, wherein: the air inlet end cover is provided with a first sleeve, the first sleeve is sleeved outside the air inlet pipe, the first partition plate is provided with a second sleeve, the second sleeve is sleeved outside the first sleeve, one end of the first sleeve extends to the first partition plate, one end of the second sleeve extends to the air inlet end cover, gaps are reserved between the first sleeve and the first partition plate, and gaps between the second sleeve and the air inlet end cover, and the silencing channel is formed by a space between the cylinder body and the second sleeve, a space between the second sleeve and the first sleeve and a space between the first sleeve and the air inlet pipe.

3. The muffler of working machinery according to claim 2, wherein: the central axis of the through pipe is parallel to the axis of the barrel, and the through pipe is arranged on one side, away from the first sleeve, of the second sleeve.

4. The muffler of working machinery according to claim 2, wherein: the noise reduction cotton is installed on the inner wall of the first sleeve.

5. The muffler of working machinery according to claim 2, wherein: the air inlet end cover is detachably connected with the cylinder, and the first sleeve is detachably connected with the air inlet end cover.

6. The muffler of working machinery according to claim 5, wherein: and a sealing element is clamped between the air inlet end cover and the cylinder body.

7. The muffler of working machinery according to claim 1, wherein: the barrel is the cavity tubular structure that both ends link up, the intake pipe with the coaxial setting of barrel.

8. The muffler of working machinery according to claim 1, wherein: engineering machine tool silencer still includes the connecting pipe of admitting air and the connecting pipe of giving vent to anger, the connecting pipe of admitting air with intake-tube connection, the connecting pipe of giving vent to anger with the outlet duct is connected, the connecting pipe of admitting air with all install the fixed block on the connecting pipe of giving vent to anger.