KR20150141837A - Blasting apparatus - Google Patents

Abstract

Disclosed is a blasting device. According to an embodiment of the present invention, the blasting device includes: a chamber storing abrasives; a supply line having an end connected to the chamber; a blasting gun connected to the other end of the supply line, spraying the abrasives, supplied from the chamber, and absorbing the same again; a collecting line connecting the blasting gun and the chamber to collect the abrasives, absorbed by the blasting gun, into the chamber; and an ejector installed in the collecting line, and providing absorbing force to absorb the abrasives through the blasting gun.

Description

BLASTING APPARATUS

The present invention relates to a blasting apparatus.

Blasting (painting pretreatment) work is usually performed inside the factory. Normally, it works with open blasting, so it does not control the abrasive to scatter in all directions. If the workpiece is small, it is put into an enclosed space such as a cabinet to prevent abrasive and dust scattering.

In some cases, it is necessary to work in the outdoors, but covering work such as hitting a mesh should be performed in order not to affect the surrounding environment due to abrasives and dust scattering. This type of work requires a long time for the cover to be cleaned and the abrasive material can not be completely blocked, so that it takes a long time for the cleaning work to recover the abrasive after the work. When the abrasive material that is not completely recovered is introduced into the surrounding equipment, A malfunction is caused and a large loss occurs. In order to overcome this difficulty, a vacuum blasting operation was proposed instead of open blasting. Vacuum blasting refers to a blasting operation in which dust is generated by the sprayed abrasive or the polishing process.

However, conventional vacuum blasting apparatuses are generally complicated in structure, large in size, and heavy in weight. Therefore, it has been very difficult to perform the blasting operation for the narrow area using the conventional vacuum blasting apparatus.

[0008]

The embodiments of the present invention are intended to provide a blasting apparatus which is downsized and improved in portability.

According to an aspect of the present invention, there is provided a polishing apparatus comprising: a chamber for storing an abrasive; A supply line, one end of which is connected to the chamber; A blast gun connected to the other end of the supply line for spraying and sucking the abrasive supplied from the chamber; A recovery line interconnecting the blasting gun and the chamber so that the abrasive material sucked in the blasting gun is recovered to the chamber; And an ejector installed in the recovery line, the ejector providing a suction force for sucking the abrasive material through the blast gun.

The blasting gun includes a nozzle member connected to the supply line and mixing the abrasive with the compressed air and jetting the mixture; And a head member for sucking the sprayed abrasive again.

Wherein the head member has a bent pipe shape and the nozzle member is installed in the head member and the jetting port of the nozzle member is located inside the head member and can be directed to the tip of the head member opened toward the workpiece .

The blasting gun may further include a brush installed at the tip of the head member.

Wherein the blasting apparatus comprises: a back plate on which the chamber is supported; And a shoulder formed on the back plate.

The blasting apparatus may further include a filter unit installed in the chamber to prevent the dust introduced into the chamber from being discharged to the outside through the collection line.

The blasting apparatus may further include an abrasive material supply cutoff unit for cutting off the supply of the abrasive material through the supply line.

The abrasive material supply cutoff unit may cut off the supply of the abrasive material by pressing the supply line.

The abrasive material supply cutoff portion may include: a first pressing member and a second pressing member arranged to face each other with respect to the supply line; An elastic member for providing an elastic force to push the second pressing member toward the first pressing member side; And a wire for providing a tension to pull the second pressing member in a direction away from the first pressing member, and when the tension is removed from the wire, the elastic member pushes the second pressing member toward the first pressing member The supply line may be squeezed, and if tension is applied to the wire, the wire may pull the second squeezing member in a direction away from the first squeezing member to release the squeezing of the supply line.

The abrasive supply cutoff portion may include a drum for winding or unwinding the wire; And a lever for rotating the drum.

According to the embodiment of the present invention, the structure of the blasting apparatus is lightened and simplified by providing a suction force for sucking the abrasive material into the blasting gun using the ejector.

In addition, the blasting apparatus includes the back plate and the shoulder, thereby improving the portability of the blasting apparatus and allowing the operator to carry the blasting operation to the shoulder regardless of the place.

1 is a view showing a blasting apparatus according to an embodiment of the present invention,
Fig. 2 is an enlarged view of a portion A in Fig. 1,
3 is a view showing a brush shape of a blasting gun according to an embodiment of the present invention,
4 is a view showing a modification of the shape of a brush of a blasting gun according to an embodiment of the present invention,
Fig. 5 is an enlarged view of a portion B in Fig. 1,
6 is a view showing an operation state of the abrasive material supply cut-off unit according to an embodiment of the present invention, which is different from that of FIG. 5,
FIG. 7 is a view showing a modification of the abrasive material supply cutoff unit according to an embodiment of the present invention,
8 is a view showing an abrasive material supply cutoff unit according to another embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Referring to the accompanying drawings, the same or corresponding components are denoted by the same reference numerals, do.

FIG. 1 is a view showing a blasting apparatus according to an embodiment of the present invention, and FIG. 2 is an enlarged view of a portion A in FIG. 1 and 2, the blasting apparatus 100 according to the present embodiment includes a chamber 110, a supply line 120, a blasting gun 130, a recovery line 140, and an ejector 150 .

The chamber 110 stores the abrasive.

One end of the supply line 120 is connected to the chamber 110. The other end of the supply line 120 is connected to the blasting gun 130 described later. The abrasive of the chamber 110 is supplied to the blasting gun 130 through the supply line 120. The supply line 120 may be made of a flexible material.

The blasting gun 130 injects the abrasive supplied from the chamber 110 and sucks it again. The operator grasps the blasting gun 130 and ejects the abrasive material onto a workpiece (not shown). At this time, the blasting gun 130 again sucks the abrasive material sprayed as a workpiece and the dust generated in the polishing process. Thereby effectively preventing the abrasive or dust from scattering around the workpiece.

The blasting gun 130 includes a nozzle member 131 and a head member 133.

The nozzle member 131 is connected to the supply line 120 and the compressed air line 121. The compressed air line 121 is connected to the compressed air main line 102 through a manifold 101 fixed to a back plate 171 to be described later.

The nozzle member 131 may include a first connection portion 131a connected to the supply line 120 and a second connection portion 131b connected to the compressed air line 121. [

The compressed air introduced into the nozzle member 131 through the compressed air line 121 is injected through an injection port (not shown). At this time, vacuum pressure is instantaneously generated at the tip of the injection port. By this vacuum air pressure, the abrasive of the chamber 110 flows into the nozzle member 131 and is mixed with the compressed air and injected.

The nozzle member 131 is provided with a pin 134 for allowing or blocking inflow of compressed air. The pin 134 may be in the forward and backward directions by the lever 135. The lever 135 may be hinged to the second connection portion 131b, for example, but is not limited thereto.

For example, when the lever 135 is pressed in a counterclockwise direction in FIG. 2, the pin 134 is moved backward to open a compressed air inlet (not shown) formed in the nozzle member 131. In this case, the compressed air flows into the nozzle member 131.

When the lever 135 is pulled clockwise as viewed in FIG. 2, the pin 134 advances to close the compressed air inlet. In this case, the inflow of compressed air into the nozzle member 131 is blocked.

The head member 133 is connected to the recovery line 140. The head member 133 again sucks the abrasive material sprayed into the workpiece and the dust and the like generated during the polishing process.

The head member 133 may have a bent pipe shape. Both side ends of the head member 133 are opened. The rear end of the head member 133 is connected to the recovery line 140 and the front end of the head member 133 is directed to the workpiece.

The nozzle member 131 is provided on the head member 133. [ At this time, the jetting port of the nozzle member 131 is located on the inner side of the head member and faces the tip of the head member 133 opened toward the workpiece. The abrasive material jetted from the nozzle member 131 impacts the workpiece through the tip of the head member 133. The abrasive material sprayed into the workpiece and the dust and the like generated during the polishing process are sucked into the inside through the tip of the head member 133.

The abrasive material or the like sucked in from the head member 133 is recovered to the chamber 110 through the recovery line 140. The recovery line 140 interconnects the head member 133 and the chamber 110. The recovery line 140 is made of a flexible material.

According to the present embodiment, the ejector 150 is installed in the recovery line 140. [ The ejector 150 provides a suction force for sucking the abrasive material through the blasting gun 130.

More specifically, the ejector 150 is connected to the compressed air line 141. The compressed air line 141 is connected to the compressed air main line 103 through a manifold 101 fixed to a back plate 171 described later. The manifold 101 is provided with a valve 105 for opening and closing the compressed air line 141.

When compressed air flows into the ejector 150, the internal velocity of the ejector 150 increases, and instantaneous vacuum pressure is generated. This vacuum pressure serves as a suction force for sucking abrasives and the like from the head member 133.

The blasting apparatus 100 according to the present embodiment provides a suction force for sucking the abrasive material into the blasting gun 130 using the ejector 150, so that the structure of the blasting apparatus 100 is simplified and simplified.

For example, when a separate pump is used to provide a suction force, the weight of the pump itself is large and the entire weight of the blasting device 100 becomes large. In order to prevent the pump from being damaged by dust or the like introduced into the pump, The structure is complicated and the filter can be enlarged.

The blaster device 100 can be downsized due to the light weight and simplification of the structure due to the use of the ejector 150, and blasting operation is possible in a narrow area.

The blasting gun 130 may further include a brush 136 installed at the tip of the head member 133. The brush 136 includes a ring-shaped body 136a coupled to the tip of the head member 133 and a brush bristle 136b attached to the tip of the body 136a.

The brush 136 thus configured closes the space between the tip of the head member 133 and the workpiece. The abrasive discharged from the nozzle member 131 and discharged through the front end of the head member 133 is clogged by the brush 136 and is sucked through the head member 133 without being scattered around. Further, the dust or the like generated in the polishing process is clogged by the brush 136 and sucked through the head member 133 without scattering to the periphery.

The shape of the tip of the brush 136 corresponds to the structure of the object to be contacted with the tip. For example, when the workpiece W to which the tip of the brush 136 is in contact has a flat plate structure as shown in Fig. 3, the tip of the brush 136 may have a rectangular shape. 3 is a view showing a brush shape of a blasting gun according to an embodiment of the present invention.

Or the workpiece W to which the tip of the brush 136 is in contact has a structure in which the flat plates are mutually orthogonal as shown in FIG. 4, the tip of the brush 136 may have an equilateral triangle shape. 4 is a view showing a modification of the brush shape of the blasting gun according to the embodiment of the present invention.

Referring to FIG. 1, the blasting apparatus 100 further includes a back plate 171 and a shoulder 175. The backing plate 171 may be supported not only with the chamber 110 but also with the supply line 120, the recovery line 140, and the like. A shoulder hook 175 is formed on the back plate 171. The operator can use the shoulder straps 175 to attach the back plate 171 to the shoulder.

The back plate 171 and the shoulder 175 improve the portability of the blasting apparatus 100. Accordingly, the operator can place the blasting device 100 on his / her shoulder and perform the blasting operation regardless of the place.

Referring to FIG. 1, the blasting apparatus 100 further includes a filter unit 180. The filter unit 180 prevents the dust introduced into the chamber 110 from being discharged to the outside. The filter unit 180 may have a bag filter shape as shown in FIG. 1, but is not limited thereto.

5 is an enlarged view of a portion B in Fig. Referring to FIGS. 1 and 5, the blasting apparatus 100 further includes an abrasive supply cutoff unit 190. The abrasive supply cutoff portion 190 blocks the supply of abrasives from the chamber 110 to the blast gun 130 via the supply line 120.

The abrasive material supply cut-off portion 190 according to the present embodiment cuts off the supply of the abrasive material in such a manner that the supply line 120 is compressed.

The abrasive supply cutoff portion 190 includes a first pressing member 191, a second pressing member 192, an elastic member 193, and a wire 194. The first pressing member 191 is fixed to a supporting member fixed to the back plate 171. The second pressing member 192 is arranged to face the first pressing member 191 about the supply line 120. [

The second pressing member 192 is slidably engaged with the guide 191a extending in the direction of contact between the first pressing member 191 and the second pressing member 192. [ One end of the guide 191a may be fixed to the first pressing member 191 as shown in FIG. 5, but is not limited thereto.

A stopper 191b may be interposed between the first pressing member 191 and the second pressing member 192. [ The stopper 191b prevents the first pressing member 191 from coming into close contact with the second pressing member 192. [

The elastic member 193 provides an elastic force to push the second pressing member 192 toward the first pressing member 191 side. The elastic member 193 may have a coil spring shape inserted into the guide 191a, but is not limited thereto.

One end of the elastic member 193 is supported by a support portion 192a provided at an end of the guide 191a and the other end of the elastic member 193 is provided to the guide 191a so as to be supported by the second compression member 192. At this time, the elastic member 193 pushes the second pressing member 192 toward the first pressing member 191 with respect to the supporting portion 192a provided at the end of the guide 191a.

A wire 194 is connected to the second pressing member 192. The wire 194 provides a tension that pulls the second pressing member 192 in a direction away from the first pressing member 191.

The abrasive material supply cut-off portion 190 configured as described above causes the elastic member 193 to push the second pressing member 192 toward the first pressing member 191 when the tension on the wire 194 is removed, 120).

6, the wire 194 pulls the second pressing member 192 in a direction away from the first pressing member 191 to press the supply line 120 ) Is released. 6 is a view showing an operation state of the abrasive material supply cut-off portion according to an embodiment of the present invention, which is different from that of FIG.

Referring to FIGS. 1 and 2, the abrasive supply cut-off portion 190 may further include a drum 195 and a lever 196. The drum 195 winds or loosens the wire 194. And the lever 196 rotates the drum 195.

When the wire 194 is released from the drum 195 by the operation of the lever 196, the tension on the wire 194 is removed and the supply line 120 is squeezed as shown in Fig. When the wire 194 is wound on the drum 195 by the operation of the lever 196, tension is applied to the wire 194 to release the squeezing of the supply line 120 as shown in Fig.

According to the present embodiment, the drum 195 may be rotatably installed on one side of the blasting gun 130 as shown in FIGS. The lever 196 is connected to the drum 195 and hinged to one side of the blasting gun 130. In this case, the operator can control the supply and blocking of the abrasive material to the blasting gun 130 while holding the blasting gun 130.

A guide member 161 for guiding a wire 194 extending from the second pressing member 192 to the drum 195 side is provided in the supply line 120. [ A guide pulley 162 for guiding the wire 194 guided by the guide member 161 to the drum 195 is provided on the other side of the blasting gun 130.

Alternatively, the drum 195 is rotatably installed on one side of the back plate 171 as shown in Fig. 7 is a view showing a modification of the abrasive material supply cutoff unit according to an embodiment of the present invention.

The lever 196 is fixed to the side surface of the drum 195. The drum 195 has a ratchet shape in which teeth are formed on the outer circumferential surface. A pawl 197 attached to the teeth of the drum 195 is rotatably installed on the other side of the back plate 171.

When the drum 195 is caught by the pawl 197, the drum 195 is rotatable in one direction but not in the other direction. In order for the drum 195 to rotate in the other direction, the engagement state of the pawl 197 must be released.

When the wire 194 is released from the drum 195 by the operation of the lever 196, the tension on the wire 194 is removed and the supply line 120 is squeezed as shown in Fig. When the wire 194 is wound on the drum 195 by the operation of the lever 196, tension is applied to the wire 194 to release the squeezing of the supply line 120 as shown in Fig.

The abrasive material supply cut-off portion 190 according to the present embodiment has a method of pressing the supply line 120. This method has a simple and simple structure different from the method of cutting off the supply of abrasives by using a separate commercial valve such as a motorized valve so that the blasting device 100 can be made light or simple, Thereby improving the stability.

8 is a view illustrating an abrasive material supply cutoff unit according to another embodiment of the present invention. 8, the abrasive supply cut-off portion 290 is interposed between the supply line 120 and the nozzle member 131. As shown in Fig. The abrasive supply cutoff portion 190 includes a body 291, a cylinder 292, and a piston 293.

The body 291 interconnects the nozzle member 131 and the supply line 120 and has a hollow portion (not shown). The abrasive material flows into the nozzle member 131 via the supply line 120 and the hollow portion of the body 291. The cylinder 292 extends in a direction orthogonal to the body 291. The piston 293 is inserted into the cylinder 292 and slidingly moved. At the end of the piston 293, a grip portion 293a gripped by an operator is formed.

When the piston 293 advances into the cylinder 292, the hollow portion of the body 291 is closed. In this case, the supply of abrasives to the nozzle member 131 is cut off. When the piston 293 is retracted to the outside of the cylinder 292, the hollow portion of the body 291 is opened.

The abrasive material supply cut-off portion 190 has a simple and simple structure compared with a separate commercial valve such as a motorized valve, for example, so that the blasting device 100 is lightweight or simple, and the portability of the blasting device 100 is improved do.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, many modifications and changes may be made by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims. The present invention can be variously modified and changed by those skilled in the art, and it is also within the scope of the present invention.

100: blasting device 110: chamber
120: supply line 121: compressed air line
130: blast gun 131: nozzle member
133: head member 140: recovery line
141: compressed air line 150: ejector
171: backing 175: shoulder
180: filter unit 190: abrasive material supply cut-
191: first pressing member 192: second pressing member
193: elastic member 194: wire
195: Drum 196: Lever

Claims (10)

A chamber for storing an abrasive;
A supply line, one end of which is connected to the chamber;
A blast gun connected to the other end of the supply line for spraying and sucking the abrasive supplied from the chamber;
A recovery line interconnecting the blasting gun and the chamber so that the abrasive material sucked in the blasting gun is recovered to the chamber; And
And an ejector installed in the recovery line and providing a suction force for sucking the abrasive material through the blast gun. The method according to claim 1,
The blasting gun,
A nozzle member for mixing and spraying the abrasive with compressed air; And
And a head member connected to the recovery line and sucking the sprayed abrasive again. 3. The method of claim 2,
The head member having a bent pipe shape,
Wherein the nozzle member is provided on the head member,
The jetting port of the nozzle member
And is directed toward the tip of the head member which is located inside the head member and opened toward the workpiece. The method of claim 3,
Wherein the blasting gun further comprises a brush installed at the tip of the head member. The method according to claim 1,
A back plate on which the chamber is supported; And
And a shoulder formed on the backing plate. The method according to claim 1,
Further comprising a filter unit installed in the chamber to prevent dust from entering the chamber through the collection line to be discharged to the outside. The method according to claim 1,
Further comprising an abrasive supply cutoff portion that cuts off the supply of abrasive material through the supply line. 8. The method of claim 7,
The abrasive material supply cut-
And the supply line is compressed to cut off the supply of the abrasive. 9. The method of claim 8,
The abrasive material supply cut-
A first pressing member and a second pressing member disposed to face each other with respect to the supply line;
An elastic member for providing an elastic force to push the second pressing member toward the first pressing member side; And
And a wire for providing tension to pull the second pressing member in a direction away from the first pressing member,
Wherein when the tension is removed from the wire, the elastic member pushes the second pressing member toward the first pressing member to press the supply line,
And when the wire is subjected to tension, the wire pulls the second pressing member in a direction away from the first pressing member to release the squeezing of the supply line. 10. The method of claim 9,
The abrasive material supply cut-
A drum for winding or unwinding the wire; And
Further comprising a lever for rotating said drum.

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