KR101052689B1 - Blasting device - Google Patents

Abstract

A blasting apparatus is disclosed that can improve workability by lowering the height of the apparatus. The blasting apparatus according to the present invention includes: an abrasive storage unit in which an abrasive to be used in the blasting process is stored, a plurality of abrasive supply units connected to the abrasive storage unit in parallel with the abrasive storage unit, and are supplied with abrasives; And a blasting unit receiving the abrasive from at least one of the plurality of abrasive supply units and performing a blasting process. According to this technical configuration, a plurality of abrasive supply portions are connected in parallel to minimize the height of the apparatus, thereby facilitating movement and operation of the blasting apparatus. Thereby, blasting workability and productivity can be improved.

Blasting, polishing, sandblasting, spraying, storage, tank, parallel, height.

Description

Blasting Equipment {A BLASTING APPARATUS}

The present invention relates to a blasting apparatus, and more particularly, to a blasting apparatus that can be arranged in parallel a plurality of abrasive supply tank to minimize the overall height of the apparatus.

In general, the blasting apparatus is a device for removing contaminants such as various corrosion of the surface of the steel structure generated during the production of a large steel structure by welding by abrasive spraying. An example of such a blasting apparatus is shown in FIG. 1.

Referring to FIG. 1, a general blasting apparatus includes an abrasive storage tank 10, an automatic filling conveyor 20, an abrasive injection tank 30, an injection nozzle 40, and the like.

The abrasive storage tank 10 has a square shape at the top and a triangular shape at the bottom to drive the stored abrasive to the lower side, and to supply the abrasive to the bucket 21 of the automatic filling conveyor 20 at the bottom thereof. A hole is formed. The automatic filling conveyor 20 rotates with a plurality of buckets 21, and receives the abrasive stored in the abrasive storage tank 10 and supplies the abrasive to the abrasive spray tank 30.

The abrasive spray tank 30 is disposed side by side with the abrasive storage tank 10 and the automatic filling conveyor 20 therebetween, the uppermost space 31, the upper tank 32 and the lower tank 33 The three-stage structure is provided. At this time, the uppermost space 31 maintains a vacuum state by communicating with the abrasive storage tank 10 through a pipe.

The abrasive supplied through the automatic filling conveyor 20 into the uppermost space 31 sequentially falls into the upper and lower tanks 32 and 33 through the first and second valves 34 and 35. Then, the third valve 36 provided in the lower tank 33 is opened, so that the abrasive is finally supplied to the injection nozzle 40 which sprays the abrasive toward the steel structure and performs the blasting operation.

According to the general blasting apparatus as described above, the abrasive spray tank 30 is made of a vertical multi-layer, it is acceptable to increase the overall height of the blasting apparatus. Therefore, when it is going to perform a blasting operation in a dock, a problem arises that it is not easy to move to the lower part of a ship body.

In addition, in the case of a general blasting apparatus, an automatic filling conveyor 20 for separately supplying abrasives to the uppermost space 31 of the abrasive spray tank 30 provided in a vertical multi-layer is provided, thereby increasing the total volume of the blasting apparatus. . In addition, when the pressure control is not easy when the abrasive is supplied to each layer of the abrasive spray tank 30 provided in a vertical multilayer, it causes a non-uniformity of the abrasive feed amount, causing a decrease in the polishing quality of the steel structure.

The present invention has been made in view of the above problems, and to provide a blasting apparatus that can minimize the height of the device.

Another object of the present invention is to provide a blasting apparatus with improved polishing quality by continuous abrasive supply.

The blasting apparatus for achieving the above object is an abrasive storage unit, abrasive supply unit. It includes a blasting unit and an air supply unit.

The abrasive storage portion stores the abrasive to be used in the blasting process. The abrasive storage unit includes a storage tank in which the abrasive is stored, and a plurality of on / off valves provided under the storage tank to selectively open and close the storage tank and the plurality of abrasive supply parts.

The abrasive supply unit may be selectively communicated with the abrasive reservoir to receive the abrasive, and include a plurality of abrasive supplies disposed side by side to be connected in parallel with the abrasive reservoir. In the present invention, it is illustrated that two abrasive supply units are provided. The abrasive supply unit includes a supply tank connected to the storage tank with the open / close valve interposed therebetween, and a supply valve selectively communicating the supply tank with the blasting unit. The abrasive supply unit may include a pressure valve for selectively opening and closing a connection between the air supply unit and the supply tank to pressurize and move the abrasive supplied into the supply tank by air, and to open an interior of the supply tank. An atmospheric pressure valve for selectively communicating with the outside in order to switch to the atmospheric pressure state, a connecting valve for selectively communicating the supply tank and the storage tank in the atmospheric pressure state to induce movement of the abrasive, and the amount of the abrasive in the supply tank It includes a level sensor to check.

On the other hand, according to the present invention, when any one of the plurality of abrasive supply unit is connected to the blasting unit to supply the abrasive, the connection between any one of the abrasive supply unit and the abrasive reservoir during the supply of the abrasive is blocked, The other abrasive supply unit except for one abrasive supply unit is disconnected from the blasting unit.

The blasting unit receives an abrasive from at least one of the plurality of abrasive supply units and performs a blasting process. According to the present invention, the blasting part may include: a blasting robot for polishing a surface to be coated with the abrasive material supplied from the abrasive supply part; a connecting pipe for communicating the abrasive supply part with the blasting robot; and mixing the abrasive in the connecting pipe with air; In addition, to move to the blasting robot side, it includes a mixing valve for selectively opening and closing between the connecting pipe and the air supply.

The air supply unit supplies predetermined air to the abrasive supply unit and the blasting unit to generate a pressure difference for movement of the abrasive.

According to the present invention having the configuration as described above, by the plurality of abrasive supply parts are connected in parallel with each other in parallel to the abrasive storage unit, it is possible to minimize the height of the abrasive supply unit. Therefore, it is possible to minimize the overall height of the blasting apparatus, it is possible to improve the workability as the movement of the blasting apparatus during the blasting process becomes easy.

In addition, since the abrasive is supplied to at least one of the plurality of abrasive supply parts to the blasting part for polishing the surface to be coated, the abrasive supply can be continuously and smoothly performed. As a result, a uniform amount of abrasive can be continuously supplied for the blasting process, thereby improving productivity due to the improved blasting quality of the surface to be coated.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

Referring to FIG. 2, the blasting apparatus 100 according to the present invention includes an abrasive storage unit 110, first and second abrasive supply units 120 and 130, a blasting unit 140, and an air supply unit 150. Include.

The abrasive storage unit 110 stores the abrasive used in the blasting process. For reference, the abrasive described in the present invention is exemplified as a grit (grit) for spraying and polishing the surface of a large steel structure (hereinafter referred to as the 'drawing surface') of a large steel structure, such as a vessel mixed with air. The abrasive storage unit 110 includes a storage tank 111, the first and second on-off valves 112 and 113.

The abrasive is stored in the storage tank 111. Here, the storage tank 111 is a tank having a predetermined volume, as shown in FIG. The storage tank 111 has a funnel shape inclined so that the abrasive stored therein can be collected.

On the other hand, the abrasive used to be supplied to the blasting unit 140 to be described later from the abrasive storage unit 110 can be reused. In order to reuse the abrasive, a dust collecting part 114 for separating and collecting the waste abrasive which cannot be reused from the used abrasive, the impurities separated from the surface to be coated, and the like are disposed on the upper portion of the storage tank 111. The dust collecting unit 114 is a centrifugal force principle of rotating the abrasive recovered from the blasting unit 140, which will be described later, at high speed, and separates and collects the relatively heavy reusable abrasive, the light abrasive mass, and impurities. .

The first and second on-off valves 112 and 113 are provided in parallel to the lower portion of the storage tank 111, so that the storage tank 111 and the first and second abrasive supply parts 120 and 130 are provided. Selectively open and close between. That is, the first open / close valve 112 is provided between the storage tank 111 and the first abrasive supply unit 120, and the second open / close valve 113 is the storage tank 111 and the second abrasive. It is provided between the supply unit 130. Here, the first and second on-off valves 112 and 113 may supply the first and second abrasive supply parts only when the abrasive is supplied to the first and second abrasive supply parts 120 and 130 at a predetermined level or more. Open and close between the 120 and 130 and the storage tank 111.

For reference, the first and second on-off valves 112 and 113 are provided below the storage tank 111 having a funnel shape, and thus the first and second opening and closing valves 112 and 113 are disposed below the storage tank 111. Two funnel shapes are provided corresponding to the two open / close valves 112 and 113.

The first and second abrasive supply units 120 and 130 may be selectively communicated with the abrasive storage unit 110, that is, the storage tank 111 and the first and second open / close valves 112 and 113. Get abrasive. At this time, since the first and second abrasive supply unit 130 is connected to the first and second on-off valves 112 and 113 provided below the storage tank 111, the lower portion of the storage tank 111 Are installed next to each other. The first and second abrasive supply parts 120 and 130 have only the difference that their installation positions are left and right as shown in FIG. 2, and have the same technical configuration.

First, the first abrasive supply unit 120 includes a first supply tank 121, a first supply valve 122, a first pressure valve 123, a first atmospheric pressure valve 124, and a first connection valve 125. And a first level sensor 126.

The first supply tank 121 is a tank having a predetermined volume connected to the storage tank 111 with the first on-off valve 112 interposed therebetween. An upper portion of the first supply tank 121 is connected to the storage tank 111, and a lower portion thereof is connected to a blasting unit 140 to be described later. At this time, the lower portion of the first supply tank 121 has a funnel shape inclined like the first supply tank 121 so that the abrasive is collected.

The first supply valve 122 is provided below the first supply tank 121 having a funnel shape in order to selectively communicate the first supply tank 121 and the blasting unit 140.

The first pressure valve 123 selectively opens and closes a connection with the air supply unit 150, which will be described later, in order to pressurize the abrasive supplied into the first supply tank 121 with air. In this case, the first pressure valve 123 is in communication with the air supply unit 150 when the first supply tank 121 and the blasting unit 140 communicate with each other by opening of the first supply valve 122. The space between the first supply tank 121 is opened. Therefore, the abrasive supplied into the first supply tank 121 can smoothly move toward the lower side of the first supply valve 122 by the pressing force of the air introduced through the first pressure valve 123, Improved supply efficiency of abrasives can be expected.

The first atmospheric pressure valve 124 selectively communicates the interior of the first supply tank 121 with the outside in order to convert the interior of the first supply tank 121 to an atmospheric pressure state. The first atmospheric pressure valve 124 switches the interior of the first supply tank 121 to an atmospheric pressure when the amount of the abrasive received from the storage tank 111 is below a predetermined level and is to be supplied with new abrasive. Let's do it. For reference, when external air flows into the first supply tank 121 by the first atmospheric pressure valve 124, the first supply tank 121 and the blasting unit 140 may be disposed between the first air supply valve 121 and the blasting unit 140. It is blocked by the supply valve 122.

The first connection valve 125 selectively communicates the inside of the first supply tank 121 switched to the atmospheric pressure state by the opening of the first atmospheric pressure valve 124 and the storage tank 111. Here, the first connection valve 125 only communicates air between the first supply tank 121 and the storage tank 111, and does not form a movement path of the abrasive. The pressure difference between the first supply tank 121 and the storage tank 111 in the atmospheric pressure is reduced by the first connection valve 125 to facilitate the movement of the abrasive when the first open / close valve 112 is opened.

The first level sensor 126 detects the amount of the abrasive supplied to the first supply tank 121. In this embodiment, as shown, the first upper sensor 127 and the first lower sensor 128 to enter into the inside of the first supply tank 121 is illustrated as including. In this case, when the presence or absence of the abrasive is detected by the first upper and lower sensors 127 and 128, the abrasive may be supplied to the blasting unit 140 by opening the first supply valve 122. However, when the abrasive is not detected by the first lower sensor 128, the abrasive supply to the blasting unit 140 is stopped. In addition, after the inside of the first supply tank 121 is switched to the atmospheric pressure state by the first atmospheric pressure valve 124 and the pressure difference with the storage tank 111 is reduced by opening the first connecting valve 125. By opening the first on-off valve 112, the abrasive moves from the storage tank 111 to the first supply tank 121.

The second abrasive supplier 130 is disposed side by side on the right side of the first abrasive supplier 120. The second abrasive supply unit 130 is similar to the first abrasive supply unit 120, the second supply tank 131, the second supply valve 132, the second pressure valve 133, the second atmospheric pressure valve 134. , A second connection valve 135 and a second level sensor 136.

Like the first supply tank 121, the second supply tank 131 is installed to selectively communicate with the storage tank 111 with the second opening / closing valve 113 of the storage tank 111 interposed therebetween. do. In addition, a lower portion of the second supply tank 131 has an inclined funnel shape to collect abrasives.

The second supply valve 132 is provided below the second supply tank 131 to selectively communicate the blasting unit 140 and the second storage tank 131. The second pressure valve 133 is for selectively communicating the air supply unit 150 with the second supply tank 131, and presses the abrasive in the second supply tank 131 with air when opened.

The second atmospheric pressure valve 134 selectively communicates the outside with the second supply tank 131, thereby switching the interior of the second supply tank 131 to an atmospheric pressure state. The second connecting valve 135 communicates with the second supply tank 131 and the storage tank 111 switched to the atmospheric pressure state by opening the second atmospheric pressure valve 134 to reduce the pressure difference, thereby reducing the abrasive. Guide your move.

The second level sensor 136 is for checking the amount of abrasive in the second supply tank 131, and like the first level sensor 126, the second upper sensor 137 and the second lower sensor 138 are provided. Separated by).

As described above, the first and second abrasive supply units 120 and 130 have the same technical configuration, and are connected in parallel to the storage tank 111 in two stages, so that the abrasive supply is stable during the blasting process. Become.

For reference, in the present exemplary embodiment, although the first and second abrasive supply parts 120 and 130 are connected to the storage tank 111 in parallel, the number of the abrasive supply parts 120 and 130 may vary. It is not limited to this.

The blasting unit 140 receives an abrasive from at least one of the first and second abrasive supply units 120 and 130 to perform a blasting process. To this end, the blasting unit 140 includes a blasting robot 141, a connecting pipe 142 and the mixing valve 143.

The blasting robot 141 sprays the abrasive mixed with air toward the surface to be coated to polish the surface of the surface to be coated. Although not shown in detail, the blasting robot 141 is provided with a carriage pad attached to the surface to be moved to inject the abrasive. For reference, the technical configuration of the blasting robot 141 is understood from the known technology and is not the gist of the present invention, detailed description and illustration are omitted.

The connection pipe 142 communicates the first and second abrasive supply parts 120 and 130 and the blasting robot 141 with each other. As shown in the drawing, the connection pipe 142 includes one pipe connected to the first and second supply valves 122 and 132 of the first and second abrasive supply parts 120 and 130.

The mixing valve 143 selectively opens and closes between the connection pipe 142 and the air supply unit 150 to mix the abrasive in the connection pipe 142 with air. Here, the air flowing into the connecting pipe 142 as the mixing valve 143 is opened also serves to press the abrasive introduced into the connecting pipe 142 toward the blasting robot 141.

As described above, the air supply unit 150 supplies air at the time of supplying and recovering the abrasive, and the abrasive storage unit 110, the first and second abrasive supply units 120, 130, and the blasting unit ( 140) are all in communication. Specifically, the air supply unit 150 is connected to the dust collecting unit 114 provided in the abrasive storage unit 110 to generate a dust collecting force, the first of the first and second abrasive supply unit 120, 130 And second pressurizing valves 123 and 133 to pressurize the abrasive to the first and second supply valves 122 and 132. In addition, the air supply unit 150 is connected to the mixing valve 143 of the blasting unit 140 to provide an abrasive movement force in the connecting pipe 142, together with the abrasive through the blasting robot 141 Provide air that is mixed and injected.

The blasting process of the blasting apparatus 100 according to the present invention having the configuration as described above will be described as follows with reference to FIG.

First, when an abrasive of a predetermined level or more is supplied from the abrasive storage unit 110 to the second supply tank 131 of the second abrasive supply unit 130, the second open / close valve 113 is closed and the second supply valve 132 is closed. ) Open. At the same time, by opening the second pressure valve 133 and injecting air into the second supply tank 131, the abrasive in the second supply tank 131 is pressed to the second supply valve 132 side. To move. Therefore, the abrasive of the second supply tank 131 flows smoothly into the connection pipe 142 of the blasting part 140.

When the abrasive is supplied to the connecting pipe 142, the mixing valve 143 of the blasting unit 140 is opened, so that the abrasive is mixed with the air by the air supplied from the air supply unit 150 (blasting robot ( 141) to the side. Thus, the abrasive and the air moved to the blasting robot 141 is introduced into the carriage pad moving along the drawing to be shown to pretreat the drawing.

On the other hand, when the abrasive is not detected by the second lower sensor 138 of the second level sensor 136 for detecting the amount of the abrasive in the second supply tank 131, the second supply valve 132 opened The second atmospheric pressure valve 134 is opened while closing the valve. Therefore, the inside of the second supply tank 131 is vented, that is, ventilated by the outside air, and the pressure is increased to the atmospheric pressure. Then, the second connection valve 135 is opened to communicate air between the storage tank 111 and the second supply tank 131, so that the abrasive is discharged from the storage tank 111 by the pressure difference to the second supply tank ( And not moved to 131). When the second supply tank 131 has an internal pressure and a pressure inside the storage tank 111 that are similar to each other, the second opening valve 113 is opened so that the abrasive stored in the storage tank 111 is stored in the second supply tank. 131 is supplied smoothly.

As described above, the abrasive is resupplied to the second supply tank 131, ie, the filler is replenished, and the first feed valve 122 is opened to continuously introduce the abrasive into the connecting pipe 142. That is, even when the abrasive supply from the second supply tank 131 is stopped, the abrasive is continuously supplied from the first supply tank 121, thereby interrupting the supply of abrasive to the blasting robot 141. Since the abrasive supply from the first supply tank 121 is the same as the first supply tank 121 described above, a detailed description thereof will be omitted.

As described above, while having been described with reference to the preferred embodiment of the present invention, those skilled in the art various modifications and changes within the scope of the present invention without departing from the spirit and scope of the present invention described in the claims below. It will be appreciated that it can be changed.

1 is a schematic view showing a general blasting apparatus, and,

Figure 2 is a schematic diagram showing a blasting apparatus according to the present invention.

Description of the Related Art [0002]

100: blasting apparatus 110: abrasive storage unit

120: first abrasive supply portion 121: first supply tank

130: second abrasive supply portion 131: second supply tank

140: blasting unit 150: air supply unit

Claims (8)

An abrasive storage unit for storing an abrasive to be used in the blasting process; A plurality of abrasive supply units selectively connected to the abrasive storage unit to receive the abrasive, and arranged in parallel with each other to be connected in parallel with the abrasive storage unit; A blasting unit receiving an abrasive from at least one of the plurality of abrasive supply units and performing a blasting process; And An air supply unit supplying predetermined air to the abrasive supply unit and the blasting unit to generate a pressure difference for movement of the abrasive; Including; The blasting unit, A blasting robot for polishing a surface to be coated with the abrasive supplied from at least one of the plurality of abrasive supply units; A connecting tube for communicating the plurality of abrasive supply parts and the blasting robot with each other; And A mixing valve for selectively opening and closing the connection pipe and the air supply part to mix the abrasive in the connection pipe with air and to move it to the blasting robot side; Blasting apparatus comprising a. The method of claim 1, The abrasive storage unit, A storage tank in which the abrasive is stored; And A plurality of on / off valves provided at a lower portion of the storage tank to selectively open and close the storage tank and the plurality of abrasive supply parts; Blasting apparatus comprising a. The method of claim 2, The abrasive supply unit, A supply tank connected to the storage tank with the opening / closing valve interposed therebetween; And A supply valve for selectively communicating with the supply tank and the blasting unit; Blasting apparatus comprising a. delete The method of claim 3, wherein The abrasive supply unit, A pressure valve for selectively opening and closing a connection between the air supply unit and the supply tank in order to pressurize and move the abrasive supplied into the supply tank by air; An atmospheric pressure valve for selectively communicating with an outside to convert the inside of the supply tank into an atmospheric pressure state; A connecting valve for selectively communicating the supply tank and the storage tank in the atmospheric pressure to induce the movement of the abrasive; And A level sensor for checking the amount of the abrasive in the supply tank; Blasting apparatus characterized in that it further comprises. delete The method according to any one of claims 1 to 3, 5, When any one of the plurality of abrasive supply parts is connected to the blasting part to supply the abrasives, the connection between any one of the abrasive supply parts and the abrasive storage part during the abrasive supply is interrupted, and the one abrasive supply part Except for other abrasive supply unit blasting apparatus, characterized in that the connection with the blasting unit is blocked. An abrasive storage unit for storing an abrasive to be used in the blasting process; First and second abrasive supply parts selectively connected to the abrasive storage part to receive the abrasive, and arranged side by side to be connected in parallel to the abrasive storage part; A blasting unit receiving an abrasive from at least one of the first and second abrasive supply units and performing a blasting process; And An air supply unit selectively connected to the abrasive storage unit, the first and second abrasive supply units and the blasting unit to move the abrasive due to a pressure difference; Including; And the blasting unit includes a mixing valve to selectively open and close the air supply unit.

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