KR102271302B1 - Device for redusing noise of shot blast - Google Patents

Abstract

A shot blast noise reduction device is provided. The noise reduction device according to the present invention includes a guide pipe in which a seal roll is installed and leaking noise to the outside of the cabin, and is connected to one end of the guide pipe in communication with the guide pipe for absorbing noise flowing out of the cabin through the guide pipe. At least one of the sound-absorbing part and the reflecting part provided inside the sound-absorbing part to reflect the noise wave propagated to the inside of the sound-absorbing part is included.

Description

Shot blast noise reduction device {DEVICE FOR REDUSING NOISE OF SHOT BLAST}

The present invention relates to a noise reduction device for shot blasting.

In general, shot blasting (Shot Blast) is a facility for mechanically peeling the oxide scale (Scale) generated on the surface of the strip (Strip) after annealing (annealing).

Shot blasting removes scale generated on the surface of the strip by projecting a shot ball onto the surface of the strip using a turbine rotating at high speed inside the cabin.

A turbine installed in the shot blast cabin projects shot balls onto the surface of the strip to cause a loud noise in the process of peeling the scale, but at this time, the seal roll area where the strip enters the cabin is not sealed.

In other words, there are many gaps between the seal roll and the cabin, so the loud noise generated inside the cabin leaks out of the cabin through this gap, becoming a major noise source in the short blast room.

The present invention is a shot that can minimize the leakage of noise generated in the process of peeling the scale from the surface of the strip by projecting a shot ball at high speed from a turbine installed in a shot blast cabin to the outside of the cabin. An object of the present invention is to provide a noise reduction device for blast.

A shot blast noise reduction device according to an embodiment of the present invention is installed at one end of a cabin of a shot blast facility, a seal roll for sealing a strip entering the interior of the cabin is installed, and noise to the outside of the cabin is provided. It may include an outflow guide tube.

In addition, the noise reduction device is connected to one end of the guide pipe in communication with the sound absorbing part for absorbing the noise leaking out of the cabin through the guide pipe, at least one is provided inside the sound absorbing part and propagated to the inside of the sound absorbing part. It may include a reflector for reflecting the noise wave.

The noise reduction device may include a short ball recovery unit disposed under the sound absorbing unit and configured to recover the short balls leaking into the sound absorbing unit from the inside of the cabin through the seal rolls.

The sound absorbing unit may include a sound absorbing housing having an inner space wider than the inner space of the guide tube, and for decelerating the speed of the noise wave flowing out through the guide tube.

In addition, the sound-absorbing unit, attached to the inner surface of the sound-absorbing housing, may include a sound-absorbing plate for absorbing the sound wave reflected by the reflecting unit.

The reflector is disposed at a set interval on the inner surface of the sound-absorbing housing and forms a set angle with the first reflector on the inner surface of the first reflector, and the inner surface of the sound-absorbing housing for absorbing and reflecting the noise wave flowing out through the guide pipe, and is guided It may include a second reflector for absorbing and reflecting the noise wave leaked through the tube or reflected by the first reflector.

The second reflector may be disposed in a direction crossing the first reflector to form a third set inclination angle.

The length of the second reflector may be set to be shorter than the length of the first reflector.

The first reflecting plate and the second reflecting plate may have a built-in noise absorbing material for absorbing noise therein or may form a vacuum.

At least one bent part for dispersing the noise wave reflected from the reflection part may be disposed at the upper end or the side edge of the sound-absorbing housing.

The short ball recovery unit is installed in communication with the lower end of the sound-absorbing housing and a short ball recovery bin for recovering the short balls introduced into the sound-absorbing housing, and a discharge pipe for discharging the short balls recovered in the short ball recovery bin to the outside. may include

According to the exemplary embodiment of the present invention, by installing a noise reduction device using a reflection plate type on the seal roll, it is possible to attenuate a noise wave leaking out of the seal roll to a predetermined size or less.

That is, it is possible to reduce the noise leaking from the noise source to the maximum in a place where sealing is difficult.

Due to this, the total noise inside the shot blast room can be managed below the set level, so that the operator can work inside the shot blast room for a sufficient time.

1 is a schematic configuration diagram for explaining the installation position of the noise reduction device of the shot blast according to an embodiment of the present invention.
Figure 2 is a schematic side cross-sectional view of the noise reduction apparatus of the shot blast according to an embodiment of the present invention.
3 is a schematic bottom view of a noise reduction device for shot blasting according to an embodiment of the present invention, and is a view from the top of the strip surface.
Figure 4 is a schematic side cross-sectional view for explaining the noise reduction principle of the noise reduction apparatus of the shot blast according to an embodiment of the present invention.
5 is a partial cross-sectional side view of a reflector of a shot blast noise reduction device according to an embodiment of the present invention, (a) shows an internal vacuum form, (b) shows an integrated form, (c) is a noise absorber shows the built-in form

Hereinafter, with reference to the accompanying drawings, an embodiment of the present invention will be described so that those of ordinary skill in the art can easily carry out the present invention. As can be easily understood by those of ordinary skill in the art to which the present invention pertains, the embodiments described below may be modified in various forms without departing from the concept and scope of the present invention. Wherever possible, identical or similar parts are denoted by the same reference numerals in the drawings.

The terminology used below is for the purpose of referring to specific embodiments only, and is not intended to limit the present invention. As used herein, the singular forms also include the plural forms unless the phrases clearly indicate the opposite. As used herein, the meaning of 'comprising' specifies a particular characteristic, region, integer, step, operation, element and/or component, and other specific characteristic, region, integer, step, operation, element, component, and/or group. It does not exclude the existence or addition of

All terms including technical terms and scientific terms used below have the same meaning as those commonly understood by those of ordinary skill in the art to which the present invention belongs. Terms defined in the dictionary are further interpreted as having a meaning consistent with the related art literature and the presently disclosed content, and unless defined, are not interpreted in an ideal or very formal meaning.

1 is a schematic configuration diagram for explaining the installation position of the shot blast noise reduction device according to an embodiment of the present invention, Figure 2 is a schematic view of the shot blast noise reduction device according to an embodiment of the present invention It is a side cross-sectional view.

3 is a schematic bottom view of a noise reduction device for shot blasting according to an embodiment of the present invention, a view from the top of the strip surface, and FIG. 4 is a shot blast noise reduction according to an embodiment of the present invention. It is a schematic side cross-sectional view for explaining the noise reduction principle of the device.

5 is a partial cross-sectional side view of a reflection plate of a shot blast noise reduction device according to an embodiment of the present invention, (a) shows an internal vacuum form, (b) shows an integrated form, (c) is a noise absorber represents the built-in form.

1 to 5, the shot blast noise reduction device according to an embodiment of the present invention is a shot ball 11 on the surface of the strip 20 introduced into the cabin 10 in the shot blast facility. It is a device to reduce the noise generated in the process of peeling the scale by projecting it.

The noise reduction device is installed at one end of the cabin 10 to communicate with an induction pipe 100 that allows noise to leak out of the cabin 10, one end of the guide pipe 100, and is connected to the guide pipe ( 100) a sound absorbing part 200 for absorbing noise leaking through, and at least one reflective part provided on the inside of the sound absorbing part 200 to reflect the noise wave propagated to the inside of the sound absorbing part 200 ( 300) may be included.

A pair of seal rolls 30 for sealing the strip 20 entering the interior of the cabin 10 may be installed on the inner surface of one end of the guide tube 100 .

Here, one end of the guide pipe 100 refers to an end farther from the inside of the cabin 10 , that is, the left end of FIG. 2 .

In addition, the noise reduction device is disposed in the lower portion of the sound absorbing unit 200, and through between the seal rolls 30 from the inside of the cabin 10 to recover the shot balls 11 leaking into the sound absorbing unit 200. It may include a short ball recovery unit 400 for

The sound absorbing part 200 has an internal space (b) wider than the internal space (eg, volume) (a) of the guide tube 100 , and is a sound absorption for decelerating the speed of the noise wave flowing out through the guide tube 100 . A housing 210 may be included.

In addition, the sound absorbing unit 200 is attached to the inner surface of the sound absorbing housing 210 and may include a sound absorbing plate 220 for absorbing the sound wave reflected by the reflecting unit 300 .

The lower end of the sound-absorbing housing 210 may be opened to recover the short ball 11 from the short ball recovery unit 400 .

Accordingly, the sound-absorbing housing 210 may be formed in a substantially rectangular box shape having an open lower end and an upper surface portion and four side portions. At this time, the sound-absorbing housing 210 may be made smaller than the space occupying approximately 1/3 of the internal space (eg, the space disposed on the left side of the sound-absorbing housing in FIG. 2) occupying approximately 2/3 of the remaining space.

One end of the sound-absorbing housing 210 may be provided with a passage opening 211 for the strip 20 to pass therethrough.

In addition, the other end of the sound-absorbing housing 210 may be provided with a coupling opening 213 for the guide tube 100 to be inserted and coupled.

The sound absorbing plate 220 may be formed of a perforated sound absorbing plate with excellent sound absorption of sound waves.

Reflector 300 is disposed at a set interval on the inner surface of the upper end and side of the sound-absorbing housing 210, while absorbing the noise wave flowing out through the guide tube 100 to reflect toward the inner surface of the sound-absorbing housing 210 It may include a first reflector 310 for

In addition, the reflector 300 is disposed on the inner surface of the sound-absorbing housing 210 while forming a set angle with the first reflecting plate 310 , and the sound wave reflected by the guide tube 100 and the first reflecting plate 310 . It may include a second reflecting plate 320 for reflecting to the inner surface of the sound-absorbing housing 210 while absorbing.

The first reflector 310 is inclined with a first inclination angle θ1 set between the inner surface of the sound-absorbing housing 210 for easy reflection of the sound wave, and the second reflector 320 is the sound wave. For easy reflection of the sound-absorbing housing 210 and the inner surface between the second inclination angle (θ2) and may be disposed inclined.

The second reflecting plate 320 is disposed at a set distance from the first reflecting plate 310 and shifted from the first reflecting plate 310 to achieve a third inclination angle θ3 set between the first reflecting plate 310 and the first reflecting plate 310 . They may be arranged in an intersecting direction.

The third inclination angle θ3 between the first reflecting plate 310 and the second reflecting plate 320 is the second reflecting plate 320 to absorb the sound waves reflected by the guide tube 100 and the first reflecting plate 310 . The housing 210 may be set to form an acute angle, a right angle, or an obtuse angle to easily reflect the inner surface of the housing 210 .

In addition, the third inclination angle θ3 is set to be the same according to the installation position of each of the second reflection plates 320 in the plurality of second reflection plates 320 disposed to correspond to the plurality of first reflection plates 310 . However, it goes without saying that each may be set differently according to need.

In this embodiment, the second reflecting plate 320 may be disposed to form a substantially triangular shape together with the inner surface of the sound-absorbing housing 210 and the first reflecting plate 310 .

The first reflecting plate 310 and the second reflecting plate 320 is a sound-absorbing housing after the sound wave propagated to the inner space (b) of the sound-absorbing housing 210 collides with the first reflecting plate 310 and the second reflecting plate 320 ( 210) may have a length set so as to be maximally reflected to the inner surface.

The second reflecting plate 320 has a shorter length than the first reflecting plate 310 so that the first reflecting plate 310 can easily reflect the noise wave flowing out through the guide tube 100 toward the inner surface of the sound-absorbing housing 210 . can be set to have

The first and second reflecting plates 310 and 320 may have an internal vacuum shape in which the inside of the outer shell made of stainless steel is in a vacuum state, as shown in FIG. 5 ( a ) in order to absorb and reflect noise waves.

In addition, the first and second reflectors 310 and 320 may have an integral shape manufactured integrally without an internal space made of stainless material or the like, respectively, as shown in FIG. 5 ( b ) for reflection of noise waves.

Furthermore, the first and second reflectors 310 and 320 each have noise absorbing materials 311 and 321 embedded in the inner space of the outer shell made of stainless steel as shown in FIG. 5 ( c ) for absorbing and reflecting noise waves, respectively. It may have an absorbent built-in form.

Of course, the first and second reflectors 310 and 320 may be provided in combination with the shapes shown in FIGS. 5 (a) to (c).

In addition, at least one bent portion 330 for maximally dispersing the noise wave reflected from the reflection unit 300 may be disposed at the upper end or the side corner of the sound-absorbing housing 210 in a set size and shape.

Although the bent portion 330 is bent in a right angle shape in FIG. 2 , it is not limited thereto and may be bent in various shapes and sizes as needed.

The short ball recovery unit 400 is installed in communication with the lower end of the sound-absorbing housing 210 , and a short ball recovery container 410 for recovering the shot balls introduced into the sound-absorbing housing 210 , and a short ball recovery container It may include a discharge pipe 420 for discharging the short ball recovered in 410 to the outside.

In addition, a discharge pipe opening/closing valve 430 for opening and closing the discharge pipe 420 may be installed in the discharge pipe 420 .

Hereinafter, with reference to FIGS. 1 to 5, the operation of the shot blast noise reduction device according to an embodiment of the present invention will be described.

First, the noise generated during blasting with the shot ball 11 on the surface of the strip 20 using the turbine 13 inside the cabin 10 is the induction pipe 100 from the inside of the cabin 10 . The seal roll 30, ie, the cabin 10, leaks out through the inner space (the space in (a) of FIG. 4).

And, the noise leaking out of the seal roll 30 through the inner space (a) of the guide tube 100 is, as shown by the arrow in FIG. 4, the inner space of the sound absorbing housing 210 of the sound absorbing part 200 [FIG. 4] of (b) space].

At this time, since the inner space (b) of the sound-absorbing housing 210 is wider than the inner space (a) of the guide tube 100 , the speed of the noise wave leaking out of the seal roll 30 through the guide tube 100 . is decelerated below the set speed.

And, the noise wave moved to the inner space (b) of the sound-absorbing housing 210 is moved to the inner surface of the sound-absorbing housing (210).

In this way, the noise wave moved to the inner surface of the sound-absorbing housing 210 is, as shown in FIG. 4 , the first reflector 310 and the second reflector of the reflector 300 installed on the inner surface of the sound-absorbing housing 210 . (320) will be hit.

At this time, the noise wave colliding with the first reflecting plate 310 or reflected from the second reflecting plate 320 to the first reflecting plate 310 is partially absorbed by the first reflecting plate 310 while being partially absorbed by the first reflecting plate 310 . 2 is reflected toward the inner surface of the reflector 320 and the sound-absorbing housing (210).

In addition, the noise wave colliding with the second reflecting plate 320 or reflected from the first reflecting plate 310 to the second reflecting plate 320 is partially absorbed by the second reflecting plate 320 while being partially absorbed by the second reflecting plate 320 from the first reflecting plate. 310 and the sound-absorbing housing 210 is reflected toward the inner surface.

Since the inner surface of the first reflector 310, the second reflector 320, and the sound-absorbing housing 210 has a substantially triangular shape, the noise wave moved to the inner surface of the sound-absorbing housing 210 is a first reflector 310 and the second reflecting plate 320 .

At this time, the noise wave is repeatedly reflected and absorbed between the first reflector and the second reflector 320, and while the reflection and absorption are repeated, the noise wave is remarkably lowered to a set size (decibel) or less.

Then, the sound wave reflected from the first and second reflectors 310 and 320 to the inner surface of the sound-absorbing housing 210 is the sound-absorbing plate 220 attached to the inner surface of the sound-absorbing housing 210 as a wall interior material After moving to It is absorbed by the sound absorption plate 220 .

Although the present disclosure has been described through preferred embodiments as described above, the present invention is not limited thereto, and various modifications and variations are possible without departing from the scope of the claims set forth below. Those in the field will understand easily.

10: Cabin
20: strip
30: thread roll
100: guide tube
200: sound absorption
300: reflector
400: short ball recovery unit

Claims (10)

An induction pipe installed at one end of the cabin of the shot blasting facility, a seal roll for sealing the strip entering the inside of the cabin is installed, and the noise is discharged to the outside of the cabin;
a sound absorbing part connected in communication with one end of the guide pipe and for absorbing noise leaking out of the cabin through the guide pipe; and
At least one reflective part provided inside the sound absorbing part to reflect the noise wave propagated into the sound absorbing part
Shot blast noise reduction device comprising a. According to claim 1,
A shot blast noise reduction device disposed under the sound absorbing part and including a shot ball recovery part for recovering the shot balls leaking into the sound absorbing part from the inside of the cabin through between the seal rolls. 3. The method of claim 2,
The sound absorbing part has an inner space wider than the inner space of the guide tube, and a shot blast noise reduction device comprising a sound absorption housing for decelerating the speed of the noise wave flowing through the guide tube. 4. The method of claim 3,
The sound-absorbing unit is attached to the inner surface of the sound-absorbing housing, shot blast noise reduction device comprising a sound-absorbing plate for absorbing the sound wave reflected by the reflection unit. 4. The method of claim 3,
the reflector,
A first reflecting plate disposed at a set interval on the inner surface of the sound-absorbing housing and for absorbing and reflecting the noise wave flowing out through the guide tube, and
A shot blast comprising a second reflecting plate disposed on the inner surface of the sound-absorbing housing to form a set angle with the first reflecting plate, and for absorbing and reflecting noise waves flowing out through the guide tube or reflected by the first reflecting plate of noise reduction devices. 6. The method of claim 5,
The second reflective plate is disposed in a direction crossing the first reflective plate to form a third set inclination angle. 7. The method of claim 6,
The length of the second reflecting plate is set shorter than the length of the first reflecting plate, the noise reduction device of the shot blast. 8. The method according to any one of claims 5 to 7,
The first reflecting plate and the second reflecting plate have a built-in noise absorbing material for absorbing noise therein, or a noise reduction device for shot blasting to form a vacuum. 4. The method of claim 3,
A shot blast noise reduction device in which at least one bent part for dispersing the noise wave reflected from the reflection part is disposed on the upper end or the side edge of the sound-absorbing housing. 4. The method of claim 3,
The short ball recovery unit,
A short ball recovery container installed in communication with the lower end of the sound-absorbing housing to recover the short balls introduced into the sound-absorbing housing, and
Shot blast noise reduction device comprising a discharge pipe for discharging the shot balls recovered in the shot ball collection bin to the outside.

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