KR102544873B1 - A blast machine that compensates for the vacuum pressure for fall prevention in case of a power failure. - Google Patents

Abstract

The present invention relates to a blast machine for compensating for vacuum pressure to prevent a fall in case of a power failure configured so that the air blast machine for processing the surface of a structure before painting of a ship or structure continuously generates vacuum pressure even in the event of a power outage so as not to fall As such, a blast body having a working chamber for blasting operation while being attached to the working surface of the structure; A blast tank communicating with the working chamber of the blast body to store and supply working grit, a collection tank for collecting working grit, a dust collector for collecting working dust, and a collection tank connected to the dust collector by a vacuum line, It consists of a root blower, which is a vacuum pump that creates vacuum pressure in the workroom, an air tank connected to the existing air line, and a control means that controls various air supply, supporting the work of the blast body on the ground. In the blast machine composed of equipment,
To generate vacuum pressure in the collection tank and dust collector connected to the workroom of the blast body, an ejector that generates vacuum pressure in case of a power outage is configured in one of them or in a vacuum line connected to one of the vacuum lines connecting them. to complete a blast machine that compensates for vacuum pressure to prevent falls in case of power outage.

Description

A blast machine that compensates for the vacuum pressure for fall prevention in case of a power failure.}

The present invention relates to a blast machine for compensating for vacuum pressure to prevent a fall in case of a power failure configured so that the air blast machine for processing the surface of a structure before painting of a ship or structure continuously generates vacuum pressure even in the event of a power outage so as not to fall More specifically, an ejector compensating for vacuum pressure is configured so that the blast body equipped with a workroom for blasting while attached to the working surface of the structure does not fall even in the event of a power failure. Vacuum pressure to prevent fall during power failure It is about a blast machine that compensates for.

In general, since the construction of a ship by welding several steel plates to form a single hull is generally used, the surface of the structure and the weld line are caused by impurities such as fire damage and welding residue generated during welding in the construction of the ship. this is always messy

In addition, since there is no separate protective coating on the joints of the hull shell plates after welding, they are easily corroded and contaminated, so they must be painted.

At this time, in order to paint, it is necessary to remove contamination and rust of the welded portion in advance through surface treatment such as grinding or spraying an abrasive before painting.

In order to perform such pretreatment, polishing work using manual power tools has been mostly performed so far, but this generates a lot of dust during work, which hinders a clean working environment, and causes occupational diseases by transmitting machining vibration to the operator as it is. The surface preparation work on the hull, which is a huge structure, has a poor and dangerous working environment, so manual work is limited.

Accordingly, a blasting machine was developed to protect workers and prevent scattering of abrasives to clean the working environment. Patent documents for blast machines developed and implemented so far are as follows.

Patent Application No. 10-2008-0097603 (2008.10.06) relates to a movable blasting device, which includes a body moving by wheels; a suspension unit linking the wheel and the body in a structure capable of absorbing and buffering vibration so that the vibration of the wheel is not transmitted to the body; And a blasting module mounted on the body and projecting grit or shot onto the surface of the work object; as a technical point of view, in the vertical and horizontal directions on the vertical wall or ceiling surface to be worked Blasting can be performed while moving freely, and even if there are foreign substances on the surface of the workpiece or the surface is curved, it can flexibly buffer and offset the effect of gap deformation, enabling excellent adhesion with only magnetic force. Mobile blasting It's about the device. Patent Application No. 10-2009-0013211 (2009.02.18) is my ship invention, which is coupled to a device for working on the outer surface of a ship (polishing, blasting, painting, etc.) or painting, etc.) is pressed against an iron plate by magnetic force and transported (traveled). More specifically, between the front and rear timing pulleys, idle rollers are formed at the front and rear, respectively, to slide It is wound with a belt, and at least two or more magnet holds with magnets at the center are formed at a height smaller than the diameter of the idle roller inside the sliding belt, and the magnet holds are compressed by linking to have a tolerance with the upper bracket. Constituting a conveying bundle, the compression conveying bundle is configured so that the compression conveying bundle is moved up and down by an elevating means composed of a cylinder or a lead screw, and the timing belt is flattened by removing timing chain acid in the central part where the magnet hold is located. A device for performing surface work (polishing, blasting, painting, etc.) When working on a plane, vertical or inclined area on a ship, etc., the work performing device is compressed and moved to the steel plate surface by the magnetic force of the magnet, improving productivity and quality, and greatly reducing the risk of working on an inclined surface. , The compression transfer bundle is connected to the link with a tolerance so that the motion of the endless track can be moved more smoothly and naturally even on irregularities or welded lines, so that it can travel without movement of the device even on a steel plate surface with many irregularities or welded lines. The compression transfer bundle guides the central part of the timing belt in a sliding manner so that the timing belt is not damaged by the magnet, and the compression transfer bundle is connected to the lifting device to remove the device from the steel plate surface by simple operation of the lifting device The operator can easily attach and detach the device from the steel plate, thereby providing an endless track for moving the steel plate, which reduces work preparation time and improves productivity by increasing work efficiency. Patent Application No. 10-2011-0078598 (August 8, 2011) is for surface treatment by cleaning the walls, ceilings and floors of a built building and collecting the scattering dust in a dry way without using water. It relates to a surface treatment device capable of effectively improving workability and working environment for a structure member, wherein a cup-shaped ring brush provided along a lower circumference of a brush in contact with the surface of a structure member, and a ring brush installed inside the ring brush toward the surface of the structure member A spray nozzle that sprays abrasives at high pressure, a recovery chamber connected to the ring brush to suck in the sprayed abrasives and scattering dust generated from the surface of the structure member by vacuum pressure, and abrasives sucked into the recovery chamber connected to the recovery chamber A dust collection chamber that filters and collects abrasives from scattering dust, and is connected to a spray nozzle to pressurize and supply abrasives, and is connected to the lower side of the recovery chamber to collect abrasives sucked into the recovery chamber so that they can be recycled. Having a chamber, but coupled to correspond to the inside of the ring brush in the form of a ring with upper and lower openings, and a brush in contact with the surface of the structure member is provided along the lower circumference and spaced apart from the lower part together with the ring brush It is configured to further include an auxiliary ring brush to form a double wall. Patent Application No. 10-2018-0048868 (2018.04.27) is my own invention, and it relates to an air blast machine for processing the surface of a structure before painting of a ship or structure, and more specifically, including a vacuum pump A supply unit for supplying grit, including a grit collection unit and an air pump generating high-pressure air, and a storage tank for storing grit constitute ground equipment that supports work while operating on the ground, and the ground equipment and In an air blast machine composed of a blast body connected by a supply pipe and a recovery pipe and attached to a work surface on the ground and working while moving, the blast body is equipped with a magnet generating magnetic force adjacent to the bottom surface and a tray equipped with wheels and; a base plate made of an alloy mounted on the tray and forming a spray tunnel; a waving block in which a supply hole made of strong wear-resistant steel and a nozzle are integrally formed on the upper side of the base plate and installed so that the nozzle is located in the spray tunnel; a waving means for performing a waving operation of rotating the waving block left and right; A working room composed of an inner body made of strong wear-resistant steel and an outer body made of an alloy integrally wrapped around the outer circumferential surface so that the grit sprayed from the nozzle formed in the waving block below the base plate is sprayed to the work surface through the mouse. class; It is composed of an inner body made of strong wear-resistant steel and an outer body made of an alloy to recover the grit worked on one side of the workroom by vacuum pressure, and the wavering block composed of the nozzle is around the spray tunnel of the base plate An arc-type pedestal and a guide bush for guiding the waving operation are installed, and a waving guide having a curved surface matching the arc of the pedestal and the guide bush is integrally installed at the bottom where the nozzle of the waving block is mounted, so that the waving block is integrated with the waving block. It is an air blast machine configured so that the guide guides the guide bush and operates left and right waving. Patent Application No. 10-2018-0082145 (2018.07.16) is a prior invention of the person, and relates to an air blast machine traveling device for processing the surface of a structure before painting of a ship or structure. , The blast machine is equipped with a magnet that generates magnetic force adjacent to the bottom surface and has a pair of front and rear wheels, each of which has a drive motor attached to the front wheel to receive power from the drive motor directly and drive it, and an electric spool to the drive motor The racket is integrally attached and the manual sprocket is attached to each rear wheel, and the electric sprocket and the manual sprocket are hung by an electric means such as a chain or timing belt to transmit the driving force of the driving motor attached to the front wheel to the rear wheel. make up the driving gear. Patent Application No. 10-2019-0070308 (2019.06.13) is a prior invention of the person, and relates to a blast machine composed of multiple impellers for polishing the surface made of steel sheet, driven by a high-frequency motor and grit on the work surface. It consists of a plurality of impellers that fire, but the right impeller is configured to rotate in the forward direction and the left impeller is configured to rotate in the reverse direction, and a rubber plate damper on the inside of the periphery of the working mouse of the shot blast head portion, and a brush curtain on the outside, A ventilation hole is formed on the inside of the curtain or damper to communicate with the outside, and a blast machine configured with a plurality of impellers is completed so that external air enters the inside of the working mouse of the shot blast head. Utility model registration application No. 20-2007-0017600 (October 31, 2007) is a prior invention of the person, which includes a grit storage tank in a body frame equipped with a transfer wheel at the bottom, and the grit stored in the grit storage tank is stored in a high frequency motor. It constitutes a shot blast head configured to remove the oxide layer by tapping on the surface of the work surface using the centrifugal force according to the high-speed rotation of the impeller driven by and then collect it again. It is easily configured, a grit guide socket is formed in the center of the impeller, and a magnetic body with magnetic force is configured at the lower part of the gearbox associated with the drive motor so that the transfer wheel increases the frictional force on the work surface by the magnetic force of the magnetic body, , The head part of the shot blasting was made to be smoothly replaced in case of failure of the impera housing by means of the impera housing assembled by bolts. Utility model registration application No. 20-2010-0005544 (May 27, 2010) is a body frame with moving means, a grit storage tank equipped with a dust collector and storing grit, and driven by a high frequency motor An impera that fires the grit supplied from the storage tank to the work surface, a shot blast head installed on the body frame and configured so that the grit fired from the impera hits the work surface and returns to the grit storage tank, and moves in close contact with the work surface In a shot blasting machine made of a magnetic material having a magnetic force, a moving means composed of a track driven by a moving motor and having a plurality of magnetic materials is installed as a shock absorber on the body frame, and a grit storage tank for storing the grit When working on the wall, the grit supply port is inclined downward and located at the upper tip, and the grit launch angle of the impeller for firing the grit supplied from the grit storage tank to the wall is configured to fire upward at 45 ° with the wall, The high-frequency motor installed at the lower end of the rear end so that the impeller launcher is located as close as possible to the wall surface and the impeller are driven by a 90° electric gear made of a bevel gear or a worm gear so that the rear end of the high-frequency motor is installed in a 45° direction from the wall surface. will be.

Among the blast machines that have been developed and implemented so far, the blast machine, which is separated into a blast body that performs work in close contact with the work structure and ground equipment that supports work while operating on the ground, is generated by an electrically operated root blower. The vacuum pressure of the blast body acts on the working chamber of about 300 ~ 400mmhg, and the blast body is adsorbed to the working structure and travels to perform short work.

However, in this configuration, when the vacuum pressure applied to the working chamber of the blast body is lower than 250 mmhg due to power failure or other accidents, an accident in which the blast body falls occurs.

In view of the above problems, the present invention is a blast machine that has been developed and implemented so far, a blast body that performs work in close contact with a work structure, and a blast that is separated into ground equipment that supports work while driving on the ground. In the machine, when the vacuum pump stops operating due to power failure or other accidents during work, the purpose is to prevent the blast machine from falling by compensating for the vacuum pressure so that the blast body does not fall away from the work surface. .

The present invention is a blast body having a working chamber for blasting operation while being attached to the working surface of the structure; A blast tank communicating with the working chamber of the blast body to store and supply working grit, a collection tank for collecting working grit, a dust collector for collecting working dust, and a collection tank connected to the dust collector by a vacuum line, It consists of a root blower, which is a vacuum pump that creates vacuum pressure in the workroom, an air tank connected to the existing air line, and a control means that controls various air supply, supporting the work of the blast body on the ground. In configuring the blast machine composed of equipment,

In order to generate vacuum pressure in the collection tank and dust collector connected to the workroom of the blast body, an ejector that generates vacuum pressure in case of power failure is configured in one of these places or in one place in the vacuum line connecting them to fall in case of power failure. Complete the blast machine that compensates for the vacuum pressure for prevention.

Here, the ejector forms a venturi part with a small volume between the air inlet part and the discharge part, forms an intake hole for generating vacuum pressure on the side wall of the venturi part, and connects it to one part of the vacuum line, and the air inlet part is connected to the air line Connected to, when the power is cut off or the vacuum pressure in the working room is lower than 300mmhg, the control valve is opened to generate vacuum pressure in the intake hole.

Here, the ejector constitutes a control valve that regulates the air inlet and the intake hole at the same time, and constitutes a shut-off valve between the blast tank and the work chamber and on the line opposite to the work chamber at the location where the ejector is connected, the control valve of the ejector The shut-off valve is configured to block at the same time as the opening operation.

The present invention described above is a blast machine that is separated into a blast body that performs work in close contact with a work structure and ground equipment that supports work while operating on the ground. When stopping, the blast body compensates for the vacuum pressure so that the blast body does not fall away from the work surface to prevent the fall of the blast machine, thereby preventing damage to the equipment as well as preventing secondary accidents due to the fall is a novel invention that creates

1 is an exemplary view of the overall configuration of the present invention.
2 is an exemplary view of another configuration state of the present invention;
3 is an exemplary configuration of an ejector, which is a main part of the present invention;
Figure 4 is a cross-sectional side view of Figure 3;
Figure 5 is an exemplary embodiment of the present invention.

The configuration of the present invention will be described in detail based on the accompanying drawings.

The present invention includes a blast body 10 having a working chamber 11 for blasting while being attached to the working surface of the structure;

A blast tank 21 communicating with the working chamber 11 of the blast body 10 to store and supply working grit, a collection tank 22 collecting working grit, and a dust collector 23 collecting working dust ), a root blower 24 which is a vacuum pump that is connected to the dust collector 23 and the vacuum line 25 to generate vacuum pressure in the collection tank 22 and the workroom 11, and an existing air line ( 27) and an air tank 26 connected to it, and a control means 28 for controlling various air supply, which supports the operation of the blast body 10 on the ground. Blast composed of ground equipment 20 In configuring the machine,

To generate vacuum pressure in the collection tank 22 and the dust collector 23 connected to the working chamber 11 of the blast body 10, either one of them or one of the vacuum lines 25 connecting them , The ejector 30 that generates vacuum pressure in case of power failure is configured to complete the blast machine that compensates for the vacuum pressure to prevent falling in case of power failure.

The ejector 30 forms a venturi part 33 with a small volume between the air inlet part 31 and the discharge part 32, and the intake hole 35 generates vacuum pressure on the sidewall of the venturi part 33. ) is formed and connected to one place of the vacuum line 25, and the air inlet 31 is connected to the air line 27 so that when the power is cut off or the vacuum pressure in the workroom 11 is lower than 300mmhg, the control The valve 36 is opened to generate vacuum pressure in the intake hole 35.

Here, the ejector 30 constitutes a control valve 36 that regulates the air inlet 31 and the intake hole 35 at the same time, and between the blast tank 21 and the work chamber 11, the ejector 30 is configured to configure a shutoff valve 37 on the line opposite to the working chamber 11 at the connected position, so that the control valve 36 of the ejector 30 is opened and the shutoff valve 37 is blocked at the same time.

Looking at the embodiment of the present invention configured as described above is as follows.

A blast that moves the grit stored in the air blast tank 21 supplied through the air line 27 connected to the air tank 26 in which high-pressure air is stored, attached to the work surface of the structure through the grit pressure transfer line 29 When the blasting operation is performed by supplying it to the body 10 and spraying it on the work surface at high pressure in the workroom 11, the root blower 24, which is a vacuum pump that generates vacuum pressure installed in the ground equipment 20, operates, The vacuum pressure generated in the dust collector 23 that collects the working dust sequentially connected to the vacuum line 25 to communicate with the root blower 24 and the collection tank 22 that collects the worked grit causes the blast body 10 to communicate with the root blower 24. Acts on the working chamber 11 of the working chamber 11 to absorb the working grit and working dust, the grit is stored in the collection tank 22, the working dust is collected in the dust collector 23, and the filtered air is discharged to the outside.

At this time, the vacuum pressure generated by the root blower 24 acts on the working chamber 11 at about 300 to 400 mmhg to recover the grit and dust to the collection tank 22, as well as the blast body 10 is a working structure stick to it and make it move.

During the work in the above state, when all equipment is stopped due to a power failure, the control valve 36, which was kept off by electromagnetic force when power is supplied, is opened by the elasticity of the spring, and the air tank 26 High-pressure air flows into the air inlet 31 of the ejector 30 connected to the air line 27, passes through the venturi 33 at high speed, and is discharged to the outlet 32.

As described above, as air passes through the venturi part 33 at high speed, vacuum pressure is generated in the intake hole 35, and the dust collector 23 collects working dust through the vacuum line 25 connected to the intake hole 35. ), the collection tank 22 for recovering the worked grit, and the vacuum pressure acting on the working chamber 11 of the blast body 10.

Here, the intake hole 35 of the ejector 30 is either one of them to generate vacuum pressure in the collection tank 22 and the dust collector 23 connected to the work chamber 11 of the blast body 10, or It may be connected to any one of the vacuum lines 25 connecting them, but it is directly connected to the working chamber 11 of the blast body 10, or the vacuum line 25 connecting the working chamber 11 and the collection tank 22 ) would be more effective.

In addition, it is preferable that the control valve 36 included in the ejector 30 controls the air inlet 31 and the intake hole 35 at the same time.

In addition, a shut-off valve 37 is configured on the line opposite to the working chamber 11 between the blast tank 21 and the working chamber 11, which shoots grit into the working chamber 11, and at the location where the ejector 30 is connected. If the control valve 36 of the ejector 30 is blocked simultaneously with the opening operation, the effect will be doubled.

At this time, the shutoff valve 37 maintains an open state by electromagnetic force when power is supplied, and when the power is cut off, it is turned off by the elasticity of a spring, and is preferably configured to act opposite to the control valve 36.

Here, the power source for operating the control valve 36 and the shut-off valve 37 is directly connected to the power source for operating the root blower 24, which is a vacuum pump that generates vacuum pressure, so that even if power is supplied to other equipment, the root blower 24 ) is preferably configured to interlock when the power supplied to the root blower 24 is cut off due to a failure.

In addition, the operation of the control valve 36 and the shut-off valve 37 is configured to operate by a sensor that detects the vacuum pressure acting inside the working chamber 11 of the blast body 10, so that the vibration inside the working chamber 11 It can also be configured to operate when the air pressure is lower than 300mmhg.

10: blast body 11: workroom
20: ground equipment 21: blast tank 22: collection tank
23: dust collection 24: root blower 25: vacuum line
26: air tank 27: air line 28: control means
29: grit pressure transfer line
30: ejector 31: air inlet 32: discharge
33: venturi part 35: intake hole 36: control valve
37: shutoff valve

Claims (3)

A blast body 10 having a working chamber 11 for blasting while being attached to the working surface of the structure;
A blast tank 21 communicating with the working chamber 11 of the blast body 10 to store and supply working grit, a collection tank 22 collecting working grit, and a dust collector 23 collecting working dust ), a root blower 24 which is a vacuum pump that is connected to the dust collector 23 and the vacuum line 25 to generate vacuum pressure in the collection tank 22 and the workroom 11, and an existing air line ( 27) and an air tank 26 connected to it, and a control means 28 for controlling various air supply, which supports the operation of the blast body 10 on the ground. Blast composed of ground equipment 20 In configuring the machine,
To generate vacuum pressure in the collection tank 22 and the dust collector 23 connected to the working chamber 11 of the blast body 10, either one of them or one of the vacuum lines 25 connecting them , Blast machine for compensating for vacuum pressure to prevent fall during power failure, characterized in that it constitutes an ejector 30 that generates vacuum pressure during power failure. According to claim 1,
The ejector 30 forms a venturi part 33 with a small volume between the air inlet part 31 and the discharge part 32, and the intake hole 35 generates vacuum pressure on the sidewall of the venturi part 33. ) is formed and connected to one place of the vacuum line 25, and the air inlet 31 is connected to the air line 27 so that when the power is cut off or the vacuum pressure in the workroom 11 is lower than 300mmhg, the control A blast machine that compensates for vacuum pressure for fall prevention in case of power failure, characterized in that the valve 36 is opened to generate vacuum pressure in the intake hole 35. According to claim 1,
The ejector 30 constitutes a control valve 36 that regulates the air inlet 31 and the intake hole 35 at the same time, and between the blast tank 21 and the work chamber 11, the ejector 30 In the connected position, the shutoff valve 37 is configured on the line opposite to the work chamber 11, and the control valve 36 of the ejector 30 is opened and the shutoff valve 37 is blocked at the same time. Characterized in that A blast machine that compensates for vacuum pressure to prevent falls in case of power outage.

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