CN217002019U - Engineering machine tool silencer - Google Patents

Abstract

The utility model discloses an engineering machinery silencer which comprises a cylinder body, wherein two ends of the cylinder body are fixedly connected with end covers, a circular hole is formed in the inner wall of each end cover, a perforated pipe is arranged inside the cylinder body, a treatment cavity is formed between the cylinder body and the perforated pipe, and the end covers are communicated with the treatment cavity through the circular holes; the both ends of barrel all swing joint have the installation screwed pipe, and the both ends of barrel are provided with the extension port, and the outer wall of extension port is provided with the buckle subassembly with installation screwed pipe and barrel one end. The utility model provides a muffler for engineering machinery, wherein when gas enters an internal processing cavity through a small hole on a perforated pipe, expansion is realized, and part of low-frequency noise is eliminated, and part of high-frequency noise can be eliminated by a sound absorption material filled in the processing cavity, and meanwhile, the gas flow enters the perforated pipe through the small hole on the perforated pipe again and then is discharged out of the muffler.

Description

Engineering machine tool silencer

Technical Field

The utility model relates to the technical field of mechanical noise elimination, in particular to a muffler for engineering machinery.

Background

The vehicle exhaust system is mainly responsible for controlling the exhaust emission, exhaust back pressure and exhaust noise of the whole vehicle and ensuring that the vehicle emission meets various application standards, so that the sound generated by the vehicle is processed by using mechanical silencing equipment so as to enable the vehicle to meet the application standards.

At present, the existing engine exhaust muffler mainly adopts a reactive exhaust muffler structure with expanded and contracted pipeline sections, and utilizes the change of acoustic reactance at a section mutation part of acoustic waves to reflect a part of the acoustic waves back to a sound source so as to achieve the effect of noise elimination, and the muffler has better muffler effect on middle and low-frequency noise, but for high-frequency noise, because a resistive sound absorption material with good sound absorption effect on the high-frequency noise is not arranged in the muffler, the processing means for the noise elimination of the high-frequency noise is less, so the noise elimination effect of the noise is not ideal; in addition, the tail gas has higher temperature when being discharged, and equipment is directly connected to the exhaust port, so that the service life of the equipment can be shortened when the equipment is used in a high-temperature state.

To sum up, do not arrange the good resistive sound absorbing material of sound absorption effect to high frequency noise to above-mentioned silencer inside, it is unsatisfactory to the noise cancelling effect of high frequency noise to and the direct use under high temperature state of interface of equipment can reduce the life's of equipment problem, prime for waiting to solve.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a muffler for engineering machinery, and aims to solve the problems that a resistive sound absorption material with good high-frequency noise absorption effect is not arranged in the muffler, the high-frequency noise absorption effect is not ideal, and the service life of equipment can be shortened due to the fact that an interface of the equipment is directly used in a high-temperature state.

In order to achieve the above purpose, the utility model provides the following technical scheme: the engineering machinery muffler comprises a cylinder body, wherein two ends of the cylinder body are fixedly connected with end covers, a round hole is formed in the inner wall of each end cover, a perforated pipe is arranged inside the cylinder body, a treatment cavity is formed between the cylinder body and the perforated pipe, and the end covers are communicated with the treatment cavity through the round holes; the utility model discloses a barrel, including barrel, extension port, buckle subassembly, the both ends of barrel all swing joint have installation screwed pipe, the both ends of barrel are provided with the extension port, the outer wall of extension port be provided with installation screwed pipe with barrel one end fixed connection's buckle subassembly.

Preferably, the perforated pipe is provided with a through hole, the through hole is communicated with the treatment cavity, and the treatment cavity is filled with a sound absorption material.

Preferably, the buckle assembly comprises a fixed seat, a handle and a clamping hook, the handle is rotatably installed on the fixed seat, the clamping hook is rotatably installed on the outer walls of two opposite sides of the fixed seat, and a spring is movably installed between the handle and the clamping hook.

Preferably, an extension plate is arranged at one end of the mounting threaded pipe, a hook ring is arranged on the outer wall of one side of the extension plate, and one end of the buckle assembly is fixedly connected with the hook ring.

Preferably, the outer wall of one side of the extension port is provided with a groove, and the inner wall of one side of the groove is fixedly provided with a rubber pad.

Preferably, the outer wall of the mounting threaded pipe is provided with a projection, and the projection is in concave-convex fit with the groove.

Preferably, a hollow cavity is formed in the end cover, and damping materials are filled in the hollow cavity.

Preferably, the inner wall of the extension port is provided with a ceramic layer.

In the technical scheme, the utility model has the following beneficial effects:

firstly, when gas enters an internal processing cavity through a small hole on a perforated pipe, expansion is realized, part of low-frequency noise is eliminated, and simultaneously, part of high-frequency noise is eliminated through the change of the gas flow direction and the vibration friction generated when the gas passes through the small hole; the sound absorption material filled in the treatment cavity can eliminate part of high-frequency noise, meanwhile, the airflow passes through the small holes on the perforated pipe again, enters the interior of the perforated pipe and then is discharged out of the silencer, and part of high-frequency noise can be eliminated due to the change of the airflow direction and the vibration friction generated when the airflow passes through the small holes;

Two, connect the installation screwed pipe, then the handle control card in the rethread buckle subassembly colludes and colludes the cooperation of ring, reaches the both ends of barrel respectively with the purpose of installation screwed pipe connection, and the tail gas of emission enters into the extension port that barrel one end set up through the installation screwed pipe of connecting in, is provided with the ceramic layer at the inner wall of extension port, can absorb the heat, reduces heat direct transmission and causes the scald to the extexine.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

This document provides an overview of various implementations or examples of the technology described in this disclosure, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology.

Drawings

In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.

FIG. 1 is a schematic diagram of an overall structure provided in an embodiment of the present invention;

FIG. 2 is a schematic view of a connection structure for installing a threaded pipe according to an embodiment of the present invention;

FIG. 3 is a schematic view of a connection structure of a buckle assembly according to an embodiment of the present invention;

fig. 4 is a schematic cross-sectional structural diagram of a cylinder provided in an embodiment of the present invention.

Description of the reference numerals:

1. a cylinder body; 2. an end cap; 3. installing a threaded pipe; 31. hooking a ring; 32. a bump; 4. an extended port; 41. a groove; 5. a buckle assembly; 6. a perforated pipe; 7. a treatment chamber; 51. a fixed seat; 52. a handle; 53. and (7) clamping hooks.

Detailed Description

In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.

As shown in fig. 1-4, an engineering machinery muffler comprises a cylinder 1, wherein both ends of the cylinder 1 are fixedly connected with end covers 2, a circular hole is formed in the inner wall of each end cover 2, a perforated pipe 6 is arranged inside the cylinder 1, a treatment cavity 7 is arranged between the cylinder 1 and the perforated pipe 6, and the end covers 2 are communicated with the treatment cavity 7 through the circular holes; the tail gas discharged enters an extension port 4 arranged at one end of a cylinder body 1 through a connected mounting threaded pipe 3, a ceramic layer is arranged on the inner wall of the extension port 4 and can absorb heat, the heat is reduced and directly transmitted to the outer surface layer to cause scald, then the tail gas enters the cylinder body 1, a perforated pipe 6 is arranged in the cylinder body 1, a treatment cavity 7 is arranged between the cylinder body 1 and the perforated pipe 6, a through hole is formed in the perforated pipe 6, and a round hole is formed in a cavity of an end cover 2, so that expansion is realized when the tail gas enters the internal treatment cavity 7 through a small hole in the perforated pipe 6, part of low-frequency noise is eliminated, meanwhile, the direction of airflow is changed, vibration friction generated when the tail gas passes through the small hole is eliminated, and part of high-frequency noise is eliminated; the sound absorption material filled in the processing cavity 7 can eliminate part of high-frequency noise, meanwhile, the airflow passes through the small holes on the perforated pipe 6 again, enters the perforated pipe 6 and then is discharged out of the silencer, and because of the change of the airflow direction and the vibration friction generated when the airflow passes through the small holes, part of high-frequency noise can be eliminated, and finally, the silencing and the discharging are completed in the barrel body 1.

Both ends of the barrel body 1 are movably connected with installation threaded pipes 3, both ends of the barrel body 1 are provided with extension ports 4, and the outer wall of each extension port 4 is provided with a buckle assembly 5 for connecting the installation threaded pipe 3 with one end of the barrel body 1; firstly, the installation threaded pipe 3 is connected, and then the matching of the hook 53 and the hook ring 31 is controlled by the handle 52 in the buckle component 5, so as to achieve the purpose of respectively connecting the two ends of the barrel body 1 with the installation threaded pipe 3.

The working principle of the utility model is as follows: when the silencer is used, the installation threaded pipe 3 is connected firstly, then the matching of the clamping hook 53 and the hook ring 31 is controlled through the handle 52 in the clamping component 5, the purpose of connecting the two ends of the barrel body 1 with the installation threaded pipe 3 is achieved, after the barrel body 1 is installed, the groove 41 arranged at one end of the extension port 4 at the two ends of the barrel body 1 is in concave-convex matching with the lug 32, and the inner wall of the groove 41 is provided with the rubber pad, on one hand, the sealing effect can be achieved through the matching of the rubber pad and the lug 32, and on the other hand, the rubber pad can resist high temperature and play a certain buffering role in temperature, when the silencer works, firstly discharged tail gas enters the extension port 4 arranged at one end of the barrel body 1 through the connected installation threaded pipe 3, the ceramic layer is arranged on the inner wall of the extension port 4, the heat can be absorbed, and the scald caused by the direct transmission of the heat to the outer surface layer is reduced, then the part of the noise enters the cylinder body 1, a perforated pipe 6 is arranged in the cylinder body 1, a treatment cavity 7 is arranged between the cylinder body 1 and the perforated pipe 6, a through hole is arranged on the perforated pipe 6, and a round hole is arranged in a cavity of the end cover 2, so that when the part of the noise enters the internal treatment cavity 7 through a small hole on the perforated pipe 6, the expansion is realized, part of low-frequency noise is eliminated, and meanwhile, the change of the airflow direction and the vibration friction generated when the part of the noise passes through the small hole are eliminated, and part of high-frequency noise is eliminated; the sound absorbing material who fills in treatment chamber 7 can eliminate partial high frequency noise, the air current passes through the aperture on perforated pipe 6 once more simultaneously, get into perforated pipe 6 inside then discharge muffler, because the change of air current direction and the vibration friction that produces when passing through the aperture, can eliminate partial high frequency noise again, accomplish the amortization at last and discharge inside the barrel 1, not only it is good to the sound absorption effect processing of high frequency noise, and be provided with the ceramic layer at the inner wall of extension port 4, can avoid metal direct contact high temperature state, cause the condition that reduces life.

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and are not to be construed as limiting the scope of the utility model.

Claims (8)

1. The engineering machinery muffler is characterized by comprising a cylinder body (1), wherein two ends of the cylinder body (1) are fixedly connected with end covers (2), a round hole is formed in the inner wall of each end cover (2), a perforated pipe (6) is arranged inside the cylinder body (1), a treatment cavity (7) is formed between the cylinder body (1) and the perforated pipe (6), and the end covers (2) are communicated with the treatment cavity (7) through the round holes;

the utility model discloses a barrel, including barrel (1), the equal swing joint in both ends of barrel (1) has installation screwed pipe (3), the both ends of barrel (1) are provided with extension port (4), the outer wall of extension port (4) be provided with installation screwed pipe (3) with barrel (1) one end fixed connection's buckle subassembly (5).

2. The muffler for engineering machinery according to claim 1, wherein the perforated pipe (6) is provided with a through hole, the through hole is communicated with the processing chamber (7), and the processing chamber (7) is filled with a sound absorbing material.

3. The muffler for engineering machinery according to claim 1, wherein the buckle assembly (5) comprises a fixed seat (51), a handle (52) and a hook (53), the handle (52) is rotatably mounted on the fixed seat (51), the hook (53) is rotatably mounted on the outer wall of the fixed seat (51) on two opposite sides, and a spring is movably mounted between the handle (52) and the hook (53).

4. The muffler for engineering machinery according to claim 1, wherein an extension plate is provided at one end of the mounting threaded pipe (3), a hook ring (31) is provided on an outer wall of one side of the extension plate, and one end of the snap assembly (5) is fixedly connected to the hook ring (31).

5. The muffler for construction machinery according to claim 1, wherein the outer wall of the extension port (4) is provided with a groove (41), and a rubber pad is fixedly mounted on the inner wall of the groove (41).

6. The muffler for construction machinery according to claim 5, wherein the outer wall of the mounting threaded pipe (3) is provided with a projection (32), and the projection (32) is engaged with the groove (41) in a concavo-convex manner.

7. The muffler for the engineering machinery is characterized in that a hollow cavity is formed in the end cover (2), and damping materials are filled in the hollow cavity.

8. A working machine muffler according to claim 1, characterized in that the inner wall of the elongated port (4) is provided with a ceramic layer.

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