KR20040096449A - muffler for heavy equipment - Google Patents

Abstract

PURPOSE: A muffler for a heavy equipment is provided to absorb noise by charging a sound absorbing member between an inner cylindrical body and an outer cylindrical body, and to prevent environmental pollution by protecting the sound absorbing member against high pressure and high temperature exhaust gas. CONSTITUTION: A muffler comprises a muffler body(100) closed and formed cylindrically; a gas inlet pipe(200) communicated with the muffler body and fixed to the side of the muffler body to flow exhaust gas from an engine into the muffler body; a gas exhaust pipe(300) communicated with the muffler body to discharge exhaust gas; first and second partition plates(130,140) arranged vertically in the muffler body to divide the muffler body into chambers(150,160,170); and first and second connecting pipes(400,500) composed of holes(422,522), combined with the partition plates and inserted to the chambers. The muffler body is composed of an outer cylindrical body(110) and an inner cylindrical body(120) having holes(122) to flow noise into a space part(101), and a sound absorbing member(700) is charged in the space part between the inner cylindrical body and the outer cylindrical body.

Description

Muffler for heavy equipment

The present invention relates to a muffler for heavy equipment, and more particularly, to a muffler for heavy equipment of a new structure that can improve the noise performance in the same size.

In general, the exhaust line of the heavy equipment is provided with a silencer to attenuate the exhaust sound of the exhaust gas by reducing the temperature and pressure of the exhaust gas of the high temperature / high pressure state generated in the diesel engine. Figure 1 shows an example of such a conventional heavy equipment silencer, referring to this, the heavy equipment silencer is first in the longitudinal direction by the first and second partitions 13, 14 vertically arranged at regular intervals therein. A cylindrical noise main body 10 provided with 2, 3 chambers 15, 16, and 17, and one end thereof is inserted into the first and third chambers 15, 17 on both sides of the noise main body 10, respectively. The gas inlet pipe 20 and the gas exhaust pipe 30 having a plurality of perforations 22 and 32 formed around the respective inserts, and the first and second plates 13 and 14, respectively. One end thereof is hermetically coupled to be inserted into the second chamber 16 and the first and second connecting pipes 40 and 50 having a plurality of perforations 42 and 52 formed around the insertion part.

Therefore, when the exhaust gas generated from the engine flows into the gas inlet pipe 20, it is dispersed into the first chamber 15 through the perforations 22 of the gas inlet pipe 20, and then the first connection pipe 40. ) Into the second chamber 16 through the perforations 42 of the first connecting pipe 40 again, and then to the third chamber via the perforations 52 of the second connecting pipe 50. 17), and is dispersed and discharged into the atmosphere through the perforations 32 of the gas exhaust pipe 30. Therefore, the exhaust gas generated in the engine is reduced in pressure and temperature during the cross-sectional change (reduction / enlargement) several times to attenuate the noise.

However, in order to improve the noise performance, such a conventional heavy machinery silencer has to increase the number of partitions in the silencer body to form a plurality of chambers, and the connection pipes should be further provided, thereby increasing the complexity and size of the silencer. There is a problem that a lot of weight.

On the other hand, in some cases, as the sound-absorbing material to be filled in the noise main body is used glass fiber or rock wool, which is an environmental pollutant, but this is not only a work-avoidance phenomenon, but also discharged to the outside by the back pressure of the engine is environmental pollution and There is a problem that increases.

Therefore, the present invention has been proposed to solve the fundamental problems of the prior art as described above, an object of the present invention comprises a noise main body consisting of an outer cylinder and an inner cylinder formed with a plurality of perforations, between the outer cylinder and the inner cylinder The sound absorber which is harmless to the human body is filled in, and the sound absorber is prevented from being discharged into the air during use, thereby maintaining the initial performance and improving the noise performance of the silencer of the same size. To provide.

1 is a cross-sectional view showing an example of a conventional silencer for heavy equipment

Figure 2 is an external perspective view of a silencer for heavy equipment according to the present invention

3 is a front cross-sectional view of FIG.

4 is a cross-sectional view taken along the line A-A of FIG.

<Description of the symbols for the main parts of the drawings>

100. Basic noise 110. Outer cylinder

120. Inner body 130,140. 1st and 2nd bulkhead

150. First chamber 160. Second chamber

170. 3rd chamber 200. Gas inlet pipe

300. Gas exhaust pipe 400. First connector

500. Second connector 700. Sound absorbing material

750. Filter bed

In order to achieve the above object, the present invention is a closed cylindrical noise main body, and the airtight exhaust gas generated in the heavy-duty engine is securely fixed to communicate with the interior of the noise main body on one side of the noise main body flows into the noise main body. A gas inlet pipe which is configured to be connected to the other side of the noise main body so as to be hermetically fixed so as to communicate with the inside of the noise main body, and exhaust gas is discharged into the atmosphere, and is installed vertically or horizontally at a predetermined interval inside the noise main body. The diaphragm divides the inner space of the main body into a plurality of chambers, and the diaphragm is hermetically coupled to one end of the diaphragm so as to be inserted into one chamber. Sieve and spaced apart from the outer cylinder at regular intervals so The wall is made of an inner cylinder in which a plurality of perforations are formed so that noise flows into the space portion, and a space between the outer cylinder and the inner cylinder is filled with a sound absorbing material of a material that can withstand above 500 ° C, which is harmless to the human body. It provides a silencer for heavy equipment, characterized in that.

<Example>

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is an external perspective view of a muffler for heavy equipment according to the present invention, Figure 3 is a front sectional view of the muffler according to the present invention, Figure 4 is a cross-sectional view A-A of FIG. As shown, the muffler for heavy equipment is mounted in a cylindrical closed sound main body 100 long in the transverse direction, and vertically mounted at regular intervals along the longitudinal direction in the interior of the noise main body 100 noise main body A plurality of first and second plates 130 and 140 partitioning the inner space of the 100 into the first, second, and third chambers 150, 160, and 170, and one end of the first and second partitions 130 and 140 around the one end of the noise main body 100. It is hermetically coupled to be inserted into the chamber 150, and a plurality of perforations 222 are formed around the insertion part to allow the exhaust gas generated from the heavy-duty engine to flow into the first chamber 150. ), And one end portion is hermetically coupled to the other end portion of the noise main body 100 so as to be inserted into the third chamber 170, and a plurality of perforations 322 are formed at the insertion portion circumference to exhaust gas. Gas exhaust pipe 300 to be discharged to the atmosphere Both ends are hermetically penetrated to the first and second partitions 130 and 140 so as to be positioned above the second chamber 160, and one end thereof is provided with an opening 410 to communicate with the first chamber 150. The first connecting pipe 400 is formed with a plurality of perforations 422, and the lower end of the second chamber 160 is spaced apart from the first connecting pipe 400 by a predetermined interval so that both ends 1, 2 The opening 130 is formed to be hermetically penetrated through the diaphragms 130 and 140 and the one end portion communicates with the third chamber 170, and the second connection pipe 500 having a plurality of perforations 522 is formed in the circumference thereof. Similar to

At this time, the noise main body 100 is the outer cylinder 110, and the inner cylinder body which is spaced apart from the outer cylinder 110 by a predetermined interval inside the outer cylinder 110 to form a space 101 therebetween ( 120). At this time, a plurality of perforations 122 are formed on the circumferential wall of the inner cylinder 120, through which the noise to the space portion 101 between the outer cylinder 110 and the inner cylinder 120. Configured to enter. At this time, the space portion 101 between the outer cylinder 110 and the inner cylinder 120 is filled with a flaw material 700, through the perforations 122 of the inner cylinder 120 to the space portion 101. If noise enters, it will be absorbed. At this time, the sound absorbing material 700 has a long fiber length, excellent tensile strength and various physical properties, high temperature stability and low thermal conductivity, as well as a low density of heat accumulated due to low heat density, which reduces heat loss due to heat storage. It is light weight and flexibility that can be installed because it is lighter and more flexible than existing refractory materials, and it is made of Sirika and Alumina. It is preferable to use ceramic fibers (also called cerac wool).

In this case, a filter layer 750 is provided between the inner cylinder 120 and the sound absorbing material 700. The filter layer 750 prevents the sound absorbing material 700 from being discharged into the atmosphere together with the exhaust gas by the exhaust gas in a high temperature / high pressure state, and is preferably harmless to human body and can withstand about 800 ° C. Using glass fiber, the sound absorbing material 700 is prevented from being burned out by the exhaust gas in a high temperature / high pressure state and discharged into the atmosphere.

The heavy equipment muffler configured as described above is dispersed into the first chamber 150 through the perforations 222 of the gas inlet pipe 200 when the exhaust gas generated from the engine flows into the gas inlet pipe 200. At this time, a part of the exhaust gas noise introduced into the first chamber 150 is introduced into the space portion 101 through the perforations 122 of the inner cylinder 120, the sound absorbing material 700 provided in the space portion 101 Absorption is exhausted to the part is distributed to the second chamber 160 through the perforations 422 of the first connecting pipe 400. In this case, a part of the noise of the exhaust gas flowing into the second chamber 140 is introduced into the space 110 between the inner and outer cylinders 102 and 106 and is absorbed and exhausted by the sound absorbing material 700 as described above. It is dispersed in the third chamber 170 through the perforations 522 of 500. At this time, a part of the noise of the exhaust gas introduced into the third chamber 170 is introduced into the space portion 101 as described above, is absorbed and exhausted by the sound absorbing material 700, and a part of the perforation 322 of the gas exhaust pipe 300. Dispersed into the atmosphere and discharged through

Therefore, the heavy equipment silencer is composed of the inner and outer cylinders 110 and 120 so that the space main body 100 is formed therebetween, and the sound absorbing material 700 is filled in the space 101 to a part of the noise. Since the absorption is exhausted, there is an advantage that can improve the noise performance without increasing the overall size of the silencer. In addition, since the filter layer 750 is provided between the inner cylinder 120 and the sound absorbing material 700, it is possible to prevent the sound absorbing material 700 from being burned out by the exhaust gas in a high temperature / high pressure state and being discharged into the atmosphere.

As described above, according to the present invention, the heavy equipment silencer divides the noise main body into an inner cylinder formed with an outer cylinder and a plurality of perforations, and fills a sound absorbing material between the inner and outer cylinders, thereby absorbing part of the noise and exhausting the same size. Has the advantage of improving noise performance. In addition, the sound absorbing material is protected from the exhaust gas in a high temperature / high pressure state by the filter layer is not damaged, it is possible to prevent the pollution of the environment.

In the above, the features of the present invention have been shown and described with reference to preferred embodiments, but the present invention is not limited to the above-described embodiments, and the present invention belongs to the present invention without departing from the objects, configurations, and effects of the present invention. Many alternative changes and modifications will be possible to those skilled in the art.

Claims (3)

A closed cylindrical noise main body, a gas inlet pipe which is secured to be in communication with the interior of the noise main body at one side of the noise main body so that exhaust gas generated from a heavy equipment engine is introduced into the noise main body, and the noise main body A gas exhaust pipe is secured to communicate with the inside of the noise main body on the other side to discharge the exhaust gas into the atmosphere, and is mounted vertically or horizontally at a predetermined interval inside the noise main body to divide the interior of the noise main body into a plurality of chambers. The diaphragm is hermetically coupled to the diaphragm so that one end thereof is inserted into one chamber, and a plurality of perforations are formed around the insertion portion, The noise main body is composed of an outer cylinder and an inner cylinder having a plurality of perforations formed therein so that a space portion is formed therebetween and spaced apart from the outer cylinder and a circumferential wall is introduced into the space portion. The space between the inner cylinder and the heavy-duty silencer, characterized in that the sound-absorbing material of the material that can withstand above 500 ℃ harmless to the human body is selected and filled. The silencer for heavy equipment according to claim 1, wherein a cloth filter layer is provided between the inner cylinder and the sound absorbing material, which is harmless to a human body and capable of withstanding high temperature and high pressure of 500 ° C or higher. 3. The silencer of claim 2, wherein the filter layer is formed of a glass fiber material in which a fibrous tissue is knitted like a woven paper.