KR102004880B1 - The wet type preprocessing method of Oil tank using Robot - Google Patents

Abstract

The present invention relates to a wet type pretreatment method of a crude oil storage tank using a robot for maintenance of the crude oil storage tank, i.e., the robot which can remove crude oil or sludge coated on a wall surface of the crude oil storage tank by spraying washing water or high-pressure water. The wet type pretreatment method of the present invention comprises: a crude oil removing step of discharging crude oil stored in the crude oil storage tank to the outside; a first surface treatment step of removing foreign materials formed on the surface of a welding portion or a weak portion formed on the wall surface of the crude oil storage tank while moving a movable high pressure spray unit capable of being driven along the wall surface of the crude oil storage tank from which the crude oil has been removed in the crude oil removing step; a second surface treatment step of removing foreign materials formed on the wall surface of the crude oil storage tank while moving the movable high pressure spray unit along the wall surface of the crude oil storage tank including the welding portion or the weak portion formed on the wall surface of the crude oil storage tank in the first surface treatment step; and a painting step of spraying a paint while moving the movable high pressure spray unit along the wall surface of the crude oil storage tank from which the foreign materials have been removed in the second surface treatment step.

Description

[0001] The present invention relates to a wet type preprocessing method of an oil tank using a robot,

The present invention relates to a wet pretreatment method for a crude oil storage tank using a robot, and more particularly to a wet pretreatment method for a crude oil storage tank using a robot, The present invention relates to a wet pretreatment method for a crude oil storage tank using a robot.

In general, the crude oil storage tanks that are used for a long period of time are required to be periodically maintained. In order to perform such maintenance, the crude oil in the crude oil storage tank must be transferred to an extra storage tank and the remaining crude oil (CRUDE OIL) and sludge SLUDGE) must be cleaned from the tank.

In particular, sludge accumulates on the bottom of a storage tank storing crude oil, which is very difficult to clean by a conventional method. Techniques relating to a crude oil storage tank automatic washing apparatus that automatically cleans the washing process of crude sludge have been proposed.

Among such automatic cleaning apparatuses, air short blast machines are mainly used in a shipyard and a painting workshop intended for surface treatment, and are work equipment for spraying abrasive material on a substrate with high-pressure air to give roughness to the surface.

At this time, the air short blast is used as a device of a room structure that can be operated only at a designated place, and it is divided into a mobile device for the purpose of moving to a necessary point of the object and working in a close vicinity, Is designed on the basis of productivity and maintenance in the initial planning, the inconvenience problem is not frequent, but the movable air blast device should be easy to move, have a limited place to be placed, have a simple structure .

1, a conventional movable air blast apparatus includes a blasting tank 15 for a blasting operation, a storage hopper 14 for storing and supplying an abrasive material, an auto damper 11 for recovering the used abrasive material A bucket elevator 12 for transferring the abrasive accumulated in the auto dumper 11 to the storage hopper 14, a bucket elevator 12 for transferring the abrasive accumulated in the auto dumper 11 to the storage hopper 14, The drum separator 13 is constituted by a device for filtering the residue before the abrasive material raised by the elevator 12 is put into the storage hopper 14 and the abrasive material is again supplied to the storage hopper 14. [ (14), the above-mentioned device is placed on one frame (16) for movement, and performs work for blasting as a mobile device.

The above-described portable air-blast device is constructed in a complicated structure, in which various devices are mounted on one frame 16, and the area of the frame 16 and the volume of the device are large, There is a problem in that labor and time loss are large.

In addition, the air blast machine is provided with a problem in that the worker directly exposes the surface of the fuel tank wall surface by moving directly into the fuel tank and directly spraying the fuel tank, thereby exposing the operator to fine dust caused by dust, there was.

In addition, there is a problem that the surface of the wall surface of the fuel storage tank is thinned (reduced in thickness) due to the strong pressure at which the abrasive is sprayed.

Korean Registered Utility Model No. 20-2009-0003467 'Simple Blasting Device' (Registration date: April 18, 2011)

SUMMARY OF THE INVENTION The present invention has been conceived in order to solve the above-described problems, and it is an object of the present invention to provide a fuel tank for an automobile, which is capable of preventing an operator from being exposed to dust of an abrasive material, A wet pretreatment method for a crude oil storage tank using a robot using a traveling movable high pressure injection unit.

Another object of the present invention is to provide a dry process using a conventional abrasive (grit, sand, or other surface treatment material) by wet process using water and a water-soluble rust inhibitor to prevent dust generation, The present invention provides a wet pretreatment method for a crude oil storage tank using a robot.

The wet pretreatment method for a crude oil storage tank using a robot according to the present invention includes a crude oil removal step for discharging crude oil stored in a crude oil storage tank to the outside, a mobile high pressure injection unit capable of traveling on a wall surface of the crude oil storage tank removed in the crude oil removal step, A first surface treatment step of removing a foreign substance formed on a surface of a welded portion or a weakened portion formed on a wall surface of the crude oil storage tank while moving the crude oil storage tank, A second surface treatment step of removing foreign substances formed on a wall surface of the crude oil storage tank while the movable high pressure injection unit moves on a wall surface of the storage tank; and a second surface treatment step of removing foreign matters formed on the wall surface of the crude oil storage tank, As the spraying unit moves, Which it is characterized in that it comprises a coating step.

Preferably, in the first surface treatment step and the second surface treatment step, when the movable high-pressure injection unit removes foreign substances formed on the wall surface of the crude oil storage tank, the water-soluble solution containing water is injected pneumatically .

Preferably, the first surface treatment step injects a first aqueous solution containing water and a water-soluble rust preventive agent when the movable high pressure injection unit removes foreign matter formed on the wall surface of the crude oil storage tank.

Preferably, between the first surface treatment step and the second surface treatment step, there is further provided a nondestructive inspection step of measuring cracks or defects on the surface of the welded portion or the weakened portion formed on the wall surface of the crude oil storage tank in the first surface treatment step .

Preferably, the second surface treatment step includes moving the movable high pressure injection unit to a wall surface of the crude oil storage tank including a welded portion or a weak portion formed on the wall surface of the crude oil storage tank in the first surface treatment step, A water-soluble rust preventive agent and a foreign matter removing unit for spraying a second water-soluble solution containing water on the wall surface of the crude oil storage tank while the movable high pressure spray unit is moving after the foreign matter removing step, The method comprising the steps of:

The wet pretreatment method of the crude oil storage tank using the robot according to the present invention is characterized in that the crude oil remaining on the wall of the crude oil storage tank and the foreign matter contained in the crude oil are stored in the crude oil storage tank As the tank wall is treated, the operator does not directly clean the wall. This saves the scaffolding installation cost and the time required for scaffolding installation, eliminates the risk of safety accidents that may arise in the operator , Saving labor costs and saving working time.

Further, since the surface of the entirety of the wall surface of the crude oil storage tank including the welded portion or the weakened portion is treated after the surface of the welded portion or the weakened portion having relatively weak connection relation is treated first on the wall surface of the crude oil storage tank, Accordingly, the rigidity of the crude oil storage tank can be grasped, thereby providing the effect of treating the surface of the crude oil storage tank while maintaining the stability of the entire structure of the crude oil storage tank.

Further, when the surface of the wall surface of the crude oil storage tank is treated, the surface is treated by spraying the aqueous solution containing water with air pressure, so that the conventional dry blasting, particularly, the abrasive dust generated during the surface treatment using the abrasive (Wall thickness reduction) of the wall surface of the crude oil storage tank due to the abrasive and the deterioration of the health condition of the worker due to the abrasive dust can be prevented.

In addition, since the water-soluble solution containing water and the water-soluble rust inhibitor is sprayed at the time of processing the welded portion of the wall surface of the crude oil storage tank and the surface of the fragile portion, the injection pressure for spraying the aqueous solution in the movable high pressure injection unit can be set relatively low, It is possible to prevent the durability of the crude oil storage tank from being reduced due to the strong injection pressure applied to the fragile portion.

It is also possible to measure the crack or bond on the surface of the weld or weak portion which is relatively durable on the wall of the crude oil storage tank and adjust the jet pressure or the weight ratio of water sprayed in the first surface treatment step and water- The surface of the wall surface can be treated while maintaining the rigidity of the storage tank.

The second surface treatment step is a step of treating the surface of the entire wall surface including the welded portion or the weakened portion of the crude oil storage tank and spraying the first aqueous solution mixed with water and the water soluble antirust agent to remove the foreign matter And a washing step of removing water-soluble rust inhibitor remaining on the wall surface of the crude oil storage tank in the foreign matter removing step and removing the foreign matter on the wall surface of the crude oil storage tank so as to prevent deterioration of characteristics of the crude oil to be stored later Provides a possible effect.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an exemplary view showing a conventional movable air blast apparatus. Fig.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a crude oil storage tank wet pretreatment method using a robot.
3 is a conceptual view illustrating a wet pretreatment method of a crude oil storage tank using a robot according to a preferred embodiment of the present invention.
4 is a schematic perspective view showing a movable high-pressure injection unit according to a preferred embodiment of the present invention.
5 is an exemplary view showing the use state of the movable high-pressure injection unit of the present invention.
6 is a view showing a rotary rock of a movable high-pressure injection unit according to another embodiment of the present invention.
7 is an operational view of Fig.
8 is a view showing a state in which the scattering prevention portion is coupled to the supply pipe according to another embodiment of the present invention.
9 is a front view of the scattering prevention portion.
10 is a sectional view of Fig.
11 is a schematic cross-sectional view of the jetting portion of the present invention

Hereinafter, the technical idea of the present invention will be described more specifically with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the technical concept of the present invention, are incorporated in and constitute a part of the specification, and are not intended to limit the scope of the present invention.

In the following description of the present invention, however, the well-known functions or constructions will not be described in order to simplify the gist of the present invention.

FIG. 2 is a flowchart illustrating a wet pretreatment method of a crude oil storage tank using a robot according to a preferred embodiment of the present invention, FIG. 3 is a conceptual view illustrating a wet pretreatment method of a crude oil storage tank using a robot according to a preferred embodiment of the present invention to be.

2 and 3, the crude oil storage tank wet pretreatment method using the robot according to the present invention includes a crude oil removing step S100, a first surface treating step S200, a nondestructive testing step S300, (S400), a drying step (S500), and a painting step (S600).

The present invention relates to a surface treatment method for treating a surface of a crude oil storage tank by spraying a surface treatment liquid on the surface of a crude oil storage tank while moving the movable high pressure injection unit (1000) in contact with the surface of a wall surface of the crude oil storage tank.

First, to treat the surface of the inner wall of the crude oil storage tank 10, crude oil stored in the crude oil storage tank 10 is discharged to the outside (S100).

Generally, an outlet is formed in the lower portion of the crude oil storage tank 10, and the outlet is opened to discharge the crude oil stored in the crude oil storage tank 10 to another storage space or to the outside. In the process of discharging the crude oil, Crude oil or sludge remains on the inner wall of the tank (10).

At this time, when treating the surface of the outer wall of the crude oil storage tank 10, it is obvious that the crude oil can be carried out from the first surface treatment step (S200) to be described later by omitting step S100.

The movable high pressure injection unit 1000 is moved into the crude oil storage tank 10 after the crude oil stored in the crude oil storage tank 10 is removed and the movable high pressure injection unit 1000 is moved to the crude oil storage tank 10, The crude oil or sludge remaining on the surface of the welded portion or the weakened portion 11 formed on the inner wall of the crude oil storage tank 10 is removed.

4 and 5, the mobile high pressure injection unit 1000 includes a main body 100, a driving unit 200, a tight fitting unit 300, a jetting unit 400, a water storage unit 500 And a rust preventive storage unit 600.

The main body 100 includes a control unit (not shown) for controlling the injection amount of the water-soluble solution and the running speed of the driving unit 200. The main body 100 includes a main body 100, It is preferable to be made of a metal material having resistance corresponding to the surface of the substrate.

A pair of wire loops 110 may be coupled to the main body 100 and a wire rope 120 may be connected to the wire loops 110 as needed.

5, a lifting device such as an electric winch is installed on the upper part of the crude oil storage tank 10 in order to prevent a possible accident, and the wire rope 120 wound on the lifting equipment After being coupled to the wire loop 110, an aqueous solution injection operation is performed.

Fig. 5 exemplifies a state of treating the surface of the outer wall of the crude oil storage tank 10, and it is obvious that the treatment of the surface of the inner wall is performed in the same manner.

The driving unit 200 includes a driving wheel provided on a bottom surface of the main body 100 and a driving motor for driving the driving wheel so that the main body 100 can move along the wall surface of the object. do.

Next, the close contact part 300 makes at least one of the magnetic force and the vacuum attraction force to make the body part 100 come into close contact with the wall surface of the crude oil storage tank 10.

In the present invention, a magnetic force is used as an embodiment, and the main body 100 is closely contacted with the wall surface of the crude oil storage tank 10 in a movable state by a magnetic force generated by supplying power to the electromagnet do.

The pair of magnetic attraction belts are provided adjacent to the outer circumferential surface of the driving wheel, and the magnetic belt is configured to be linked with driving of the driving wheels. The main body 100 is fixedly supported on the wall surface of the crude oil storage tank 10 so that the magnetic attraction belt is rotated in a predetermined orbit.

The jetting unit 400 includes a rotatable arm 410 coupled to the main body 100 and rotated in the left and right directions with respect to the longitudinal direction of the rotatable arm 410, And a rotation injection nozzle 430 installed at an end of the supply pipe 420 and rotated by a motor to form a plurality of injection holes.

The rotary rocking arm 410 is coupled to the main body 100 and is rotated in the left and right directions with respect to the longitudinal direction. The rotary rocking arm 410 is configured to be rotated by a driving motor or a cylinder, 410 are rotated, the extent to which the aqueous solution is injected onto the surface of the structure is determined, and the efficiency of the operation is improved.

In addition, a vertical cross section of the rotary rocking arm 410 is formed in a rectangular shape, and a supply hose 424 for supplying a water-soluble solution to the supply pipe 420 is installed therein.

In addition, the rotary rocking arm 410 is made of a titanium alloy having high strength.

In the present invention, as shown in FIGS. 6 and 7, a portion of the rotary rocking arm 410 is flexibly formed by linking a plurality of connecting members 412.

A plurality of connecting members 412 are linked to the end portion of the rotary rocking arm 410 so that the rotary rocking arm 410 can bend in the left and right directions with respect to the longitudinal direction of the rotary rocking arm 410.

That is, a portion of the rotary rocking arm 410 is configured to have joints.

Accordingly, when the water is sprayed on the deteriorated rocks 410 in the process of spraying the water-soluble solution, the impact is relieved by being flexed flexibly when the water is sprayed on the detent rocks 410.

In addition, as the swash plate 410 flexes flexibly, the jet range in which the aqueous solution is sprayed on the surface of the crude oil storage tank 10 is expanded, thereby improving the efficiency of the operation.

More specifically, a plurality of the connecting members 412 are formed in the same shape, and the vertical cross section of the connecting member 412 is formed to have a rectangular shape at one end and a rounded curved surface at the other end, And the curved portion of the other end is forwardly coupled.

(For convenience of explanation, the direction of the side of the supply pipe 420 coupled to the connecting member 412 is referred to as forward)

One end and the other end of the connecting member 412 are partially overlapped and hinged to each other, and the connecting member 412 connected to the front is in contact with the outer side of the front side of the connecting member 412 connected to the rear, So that the angle is limited.

A spring 414 is mounted on the joint between the connecting members 412 so that even if the connecting member 412 is bent by an impact, the spring 414 is returned to its original position by the elastic force of the spring 414.

The spring 414 may be mounted on the connecting member 412 in a state in which the spring seating groove is formed in the spring seating groove and is inserted into the prong seating groove 411. The spring 414 may form a supporting protrusion on the connecting member 412, The spring 414 may be mounted only on the joint portion between the connecting members 412 and may be mounted along the side surface of the connecting member 412 as long as necessary.

Referring to FIG. 11, a feed pipe 420 is installed at an end of the rotary carpet 410, and the feed pipe 420 is fixedly supported by a support fixing member 422.

Since the supply hose 424 for supplying the water-soluble solution to the supply pipe 420 is installed inside the rotary carpet 410, the connection member 412 also has a space formed therein, .

It is preferable that the supply hose 424 and the supply pipe 420 are coupled by a connecting portion 426 such as an air gucci that can withstand ultrahigh pressure.

The support fixture 422 is formed in a pair of square plates and is connected to the end of the rotary rocker 410 with a supply pipe 420 therebetween to supply the rotary member 410 with the supply pipe 420, To be fixed firmly.

The supply pipe 420 is connected to the water storage 500 where the water is stored through the supply hose 424 and the rust inhibitor storage 600 and the compressed air tank (not shown) And is selectively supplied to the water storage part 500 and the rustproofing agent storage part 600.

That is, the rotary injection nozzle 430 receives the compressed air from the supply hose 424, and injects the water and the water-soluble rust preventive liquid by the jetting pressure of the compressed air.

A rotation injection nozzle 430 having a plurality of injection holes formed at the bottom surface thereof is rotatably coupled to an end of the supply pipe 420.

4, the rotary injection nozzle 430 is formed into a rod shape, and a plurality of injection holes are formed on the bottom surface thereof.

The rotary injection nozzle 430 is coupled to the motor and rotated by the driving force of the motor.

In the present invention, the rotary injection nozzle 430 is rotated by a motor. However, the rotary injection nozzle may be rotated (rotated) by the injection pressure.

When the rotation injection nozzle 430 is rotated by the injection pressure, it is preferable that the rotation injection hole is formed to have a curvature so as to be easily rotated.

In the present invention, the rotary injection nozzle 430 is limited to the rod shape for the sake of convenience of explanation. However, if necessary, the pair of rods may be coupled to each other in the direction crossing each other. No.

The movable high pressure injection unit 1000 described above is a wet water-soluble solution injection unit that injects a water-soluble solution onto the surface of the crude oil storage tank 10 by high-speed injection into the wall surface of the crude oil storage tank 10, It is possible to secure the merits such as improvement in workability, shortening of working air, and ensuring uniform quality.

Meanwhile, as shown in FIGS. 8 to 10, the scattering prevention part 440 is coupled to the supply pipe 420 to improve the injection efficiency.

The scattering prevention part 440 includes a scattering prevention cover 442 installed on the lower side of the supply pipe 420 and coupled to surround the rotation injection nozzle 430, A suction pipe 444 for transferring the suction force to the vacuum pump, and a vacuum pump.

The scattering-preventing cover 442 is formed in a hollow shape with its bottom opened. A spray nozzle for rotation is disposed in the inner space of the scattering-preventing cover 442, and the scattering- And discharges fugitive dust generated during spraying work, foreign matter and various fragments separated from the surface of the object, and discharges them to the outside.

8, the shatterproof bucker 442 is installed on the lower side of the high-grade pipe 420 and is fixed by the fixing bracket 441. As shown in Fig.

One end of the pair of fixing brackets 441 is coupled to the outer surface of the supply pipe 420 and the other end of the pair of fixing brackets 441 is coupled to the upper surface of the scatter prevention cover 442 , And the scatter preventing cover 442 is fixed to the supply pipe 420.

More specifically, the fixing bracket 441 includes a vertical piece coupled vertically and an inclined piece coupled to the lower portion of the vertical piece and coupled obliquely toward the outer side toward the lower portion, The slope pieces are coupled to the upper surface of the scatter preventive cover 442 so that the supply pipe 420 and the scatter preventive cover 442 are firmly coupled to each other.

The dust cover 442 is connected to the suction pipe 444 and the suction pipe 444 is provided to communicate with the inside of the dust cover to prevent scattered dust and various fragments And discharging it to the outside.

A rubber portion 446 of a bellows shape (bellows) is formed in a part of the scatter preventing cover 442 and a brush member 448 is attached to a lower side of the rubber portion 446, Scattered dust or the like in the air inlet 442 is easily sucked through the suction pipe 444 and discharged to the outside.

The rubber portion 446 is made of a material having elasticity such as rubber or urethane and has a thickness of at least 5 mm or more. The rubber portion 446 has a buffering effect on shock or vibration generated during the operation of spraying the aqueous solution solution, To prevent scattering, and to be able to suck in scattered dust inside.

The shatterproof cover 442 and the fixing bracket are preferably made of lightweight aluminum.

In addition, the present invention is characterized by a joystick for adjusting the operation of the movable high-pressure injection unit 1000 at a position spaced apart from the movable high-pressure injection unit 1000, and an operation remote controller having a display window for displaying the state adjusted by the joystick. And the like so that the operator can operate the apparatus of the present invention at a position spaced apart by a certain distance.

2 and 3, the movable high-pressure injection unit is moved along the wall surface of the crude oil storage tank 10, and the surface of the welded portion or the weakened portion having a relatively low durability among the wall surfaces of the crude oil storage tank 10 And a water-soluble rust inhibitor (S200).

At this time, if a high pressure is injected into the welded portion or the fragile portion of the crude oil storage tank 10, a gap may be generated in the wall surface, so that the first aqueous solution mixed with water and a water- . ≪ / RTI >

In the present invention, the blasting process (dry process) for spraying an abrasive material is changed to a process (spraying process) for spraying a water-soluble solution so that the risk of fire explosion due to the abrasive dust generated in the abrasive material, It is possible to prevent deterioration of the worker's health condition due to wall thinning (thickness reduction) and abrasive dust.

Here, the first water-soluble solution in which water and the water-soluble antirusting agent are mixed is mixed with the water-soluble rust inhibitor in a weight ratio of 7 to 10 per weight ratio of water.

When the weight ratio of the water-soluble rust inhibitor to the water-to-water ratio is less than 7, the concentration of the first aqueous solution is low and a strong injection pressure is required when the water-soluble rust-inhibitive agent is sprayed on the welded portion or the weakened portion.

When the weight ratio of the water-soluble rust inhibitor to the water-to-water ratio is more than 10, the concentration of the first aqueous solution is high, so that the surface remains in the space between the rough welds, It is preferable that the water and the water-soluble rust preventive are mixed in a weight ratio of 1 to 7 to 1 to 10, since the surface treatment time is increased.

Next, after the first aqueous solution is sprayed to the welded portion or the weakened portion 11 of the wall surface of the crude oil storage tank 10, cracks or defects are measured on the surface of the welded portion or the weakened portion 11 of the wall surface of the crude oil storage tank 10 A non-destructive inspection step S300 is performed.

At this time, cracks or bonds of the surface can be measured by various methods. However, in the movable high pressure injection unit 1000 of the present invention, an ultrasonic sensor unit (not shown) is installed to move along the welded portion or the weakened portion 11, The strength and durability of the battery 10 can be measured.

In the second surface treatment step (S400), the moving type high pressure injection unit (1000) moves the wall surface of the crude oil storage tank including the welding portion or the weak portion formed on the wall surface of the crude oil storage tank (10) Water or a water-soluble rust-preventive agent mixed with water to remove the water-soluble solution.

At this time, the second surface treatment step (S400) includes a foreign substance removal step (S420) and a cleaning step (S440).

First, in step S420, the movable high-pressure injection unit 1000 moves to a wall surface of the crude oil storage tank 10 including a welded portion or a weak portion formed on the inner wall of the crude oil storage tank after the non-destructive inspection step S300, (440) is a step of spraying a first water-soluble solution containing a rust preventive agent, and the cleaning step S440 is performed after the foreign matter removal step (S420) The water-soluble solution is sprayed to remove residual water-soluble rust inhibitor, crude oil and sludge on the wall surface of the crude oil storage tank 10.

Since crude oil is stored in the wall surface of the crude oil storage tank 10, particularly, on the inner wall of the crude oil storage tank 10, if the water soluble antirust agent remains on the inner wall of the crude oil storage tank 10, the crude oil is stored in the crude oil storage tank 10 Therefore, it is preferable that the second water-soluble solution used in the cleaning step S440 is only water, and the wall surface of the crude oil storage tank 10 is sprayed along with the high-pressure compressed air, .

Next, in the wet pretreatment method of the crude oil storage tank using the robot according to the present invention, the second aqueous solution is sprayed on the wall surface of the crude oil storage tank 10 in the second surface treatment step (S400) to remove remaining water, (S500) for drying the wall surface of the substrate (10).

In the drying step S500, the movable high pressure injection unit 1000 moves along the wall surface of the crude oil storage tank 10 to dry the wall surface of the crude oil storage tank 10, and the movable high pressure injection unit 1000 It is preferable that a heating unit (not shown) is installed and the wall surface is dried by the heat generated in the heating unit while traveling along the wall surface of the crude oil storage tank 10.

In addition, a separate water suction unit (not shown) may be installed in the mobile high pressure injection unit 1000 in addition to the heating unit to remove moisture from the wall surface of the crude oil storage tank 10 by suction.

When the moisture is dried in the drying step S500, the sprayed paint is easily sprayed on the wall surface of the crude oil storage tank 10 in order to prevent the wall surface of the crude oil storage tank 10 from being corroded in the coating step S600 do.

In the painting step S600, the movable high pressure spraying unit 1000 moves along the wall surface of the crude oil storage tank 10 from which the remaining crude oil, sludge and water-soluble rust preventive agent are removed in the second surface treatment step S400, Spraying step.

The movable high pressure injection unit 1000 moves along the wall surface of the crude oil storage tank 10. The movable high pressure injection unit 1000 includes a paint storage unit (not shown) in which the paint is stored, a paint spraying unit And performs the painting operation while traveling along the wall surface of the crude oil storage tank 10. [

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

10: Crude oil storage tank 11: Welded portion or weak portion
1000: Mobile High Pressure Injection Unit
100: main body part 120: wire rope
200: driving part 300:
400: jetting part 410:
412: connecting member 414: spring
420: supply pipe 422:
424: Supply hose 430: Rotary spray nozzle
440: scattering prevention part 441: fixing bracket
442: Shatterproof cover 443: Suction pipe
446: Rubber part 448: Brush member
500: water storage part 600: rustproofing agent storage part
S100: Crude oil removing step S200: First surface treatment step
S300: Nondestructive inspection step S400: Second surface treatment step
S420: foreign matter removing step S440: washing step
S500: drying step S600: painting step

Claims (5)

A crude oil removing step of discharging the crude oil stored in the crude oil storage tank to the outside;
The moving high pressure injection unit capable of traveling on the wall surface of the crude oil storage tank removed in the crude oil removal step is sprayed with a first aqueous solution containing water and a water soluble antirust agent so that the surface of the welded portion or the weak portion formed on the wall surface of the crude oil storage tank A first surface treatment step of removing the formed foreign matters;
A non-destructive inspection step of measuring cracks or defects while the movable high pressure injection unit moves on a surface of a welded portion or a weakened portion formed on a wall surface of the crude oil storage tank after the first surface treatment step;
A foreign matter removing step of spraying a first aqueous solution containing water and a water-soluble rust inhibitor on the wall surface of the crude oil storage tank including a welded portion or a weak portion formed on the wall surface of the crude oil storage tank in the first surface treatment step, A second surface treatment step of spraying a second aqueous solution containing water on the wall surface of the crude oil storage tank while the mobile high pressure injection unit is moving after the foreign matter removal step to remove the water soluble rust preventing agent and the foreign matter;
A drying step of allowing the movable high-pressure injection unit to dry the water-soluble solution injected on the wall surface of the crude oil storage tank in the second surface treatment step while moving the wall surface of the crude oil storage tank; And
And a painting step of spraying the painting material while moving the movable high pressure spraying unit along the wall surface of the crude oil storage tank from which foreign matter has been removed in the second surface treatment step. delete delete delete delete

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