KR20170028679A - Grinding apparatus for leg welding of jack-up rig - Google Patents

Grinding apparatus for leg welding of jack-up rig Download PDF

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Publication number
KR20170028679A
KR20170028679A KR1020150125612A KR20150125612A KR20170028679A KR 20170028679 A KR20170028679 A KR 20170028679A KR 1020150125612 A KR1020150125612 A KR 1020150125612A KR 20150125612 A KR20150125612 A KR 20150125612A KR 20170028679 A KR20170028679 A KR 20170028679A
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KR
South Korea
Prior art keywords
main body
core
grinding
rack
leg
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KR1020150125612A
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Korean (ko)
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KR101798015B1 (en
Inventor
김태곤
김성엽
김상준
권순도
Original Assignee
대우조선해양 주식회사
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Priority to KR1020150125612A priority Critical patent/KR101798015B1/en
Publication of KR20170028679A publication Critical patent/KR20170028679A/en
Application granted granted Critical
Publication of KR101798015B1 publication Critical patent/KR101798015B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00—Other grinding machines or devices
    • B24B27/0007—Movable machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00—Other grinding machines or devices
    • B24B27/0076—Other grinding machines or devices grinding machines comprising two or more grinding tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00—Other grinding machines or devices
    • B24B27/0084—Other grinding machines or devices the grinding wheel support being angularly adjustable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition

Abstract

The present invention relates to a leg-welded grinding apparatus of a jack-up rig capable of grinding a welded portion in a rack-in-rack and a chord in a jack-up rig, A driving means provided on the inside of the main body so as to move the main body, a grinding means provided on one side of the main body and grinding a weld portion of the rack and the core, And monitoring means installed in the main body for monitoring a work situation.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grinding apparatus for a jack-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grinding apparatus for a leg weld portion of a jack-up league, and more particularly to a grinding apparatus for a leg-welded portion of a jack-up league capable of grinding a welded portion inside a rack and a chord of a jack- will be.

In general, the offshore facility for crude oil drilling consists of a platform equipped with various drilling equipments and a leg supporting the platform. The platform is positioned according to the depth of the seabed to be drilled by crude oil in a large linear gear rack installed on the leg The leg is a large steel structure manufactured by using a rear plate, and the straightness should be maintained so that the platform can be raised and lowered.

In addition, the legs are to be welded by welding two pieces of semicircular chords and a rectilinear saw-shaped rack, and the legs must be repeatedly rotated and rotated after a certain amount of welding in order to prevent welding deformation of the single leg legs.

Conventionally, in order to weld the legs, as shown in Fig. 1, in a state in which two semicircular cores C and C 'and a rectilinear saw-like rack R are assembled, The upper joining portion obtained by joining the upper joints C and C 'is inserted into the ends of both sides of the rack R after the two-pass welding, and the square jigs 40 and 40' The wire rope W (W ') is fastened to the lugs 41 and 41' installed at the upper and lower ends of the upper and lower ends 40 and 40 ' And the leg welding operation was performed while repeating the operation of performing the leg welding.

Since the conventional leg welding operation is repeated while rotating the core C and the rack R 180 over a plurality of times, the rectangular jig 40 is attached to both ends of the heavy and long leg, (W ') is rotated alternately up and down by an overhead crane, which may cause a risk of a safety accident due to a fall of a leg, There is a problem such that a large amount is injected.

Also, in the conventional racks and cores, it is necessary to perform the weld inspection using non-destructive testing (NDT) to check the quality of the weld after the welding operation.

For the accuracy of welding defect inspection, it is necessary to perform welding inspection by removing spatter and foreign matter from the welding part. Since the inside of the rack and the core is very narrow and the welding part is long, ) Becomes very difficult.

If the rack and the core are manufactured in a delayed manner, errors in the welding defect inspection may occur due to the spatters and foreign matter not completely removed. As a result, Leading to a process delay and causing a great loss.

Korean Patent Publication No. 10-2013-0139613 (published on December 23, 2013)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in order to solve the above-mentioned problems, and its object is to grind the welds while moving inside the racks and chord of the legs, thereby completely removing the spatter and foreign matter Up leg welded portion grinding device capable of maximizing the reliability of welding defect inspection.

Another object of the present invention is to provide a traveling apparatus for cleaning a welded portion inside a rack and a core, comprising: a traveling apparatus corresponding to an inner surface; a cleaning unit for minimizing damage to the base material and simultaneously working with the plurality of surfaces; The present invention also provides a leg-welded grinding apparatus of a jack-up rig capable of performing work in a narrow and long member through monitoring and monitoring of work conditions through monitoring cameras and lighting mounting .

According to one aspect of the present invention, there is provided an apparatus for grinding a leg weld portion of a jack-up rig, comprising: a main body for grinding a weld portion of a rack and a core while moving into a rack and a core of the leg; And a grinding means provided on one side of the main body for grinding the welded portion of the rack and the core.

The main body is installed in the form of a square bar so as to enter and move into the rack and the core, and a plurality of grooves may be formed through the upper and lower portions so that the traveling means can be installed.

A lateral guide may be installed on the outer side of the main body so as to be in close contact with the inner wall surface of the core so as to enhance safety during traveling of the inside of the rack and the core.

The side guide may include a support base mounted on the main body, and a support plate attached to an end of the support base to closely contact the core inner wall surface.

The side guides may be provided on the upper and side surfaces of the main body.

The main body may be provided with a width adjusting unit to adjust the width of the core according to the size of the core.

The traveling means includes a rotating shaft provided in a groove portion of the main body, a motor electrically connected to the rotating shaft to rotate the rotating shaft, a traveling wheel installed on the rotating shaft and capable of moving the main body by a rotating shaft, . ≪ / RTI >

The traveling wheel may be provided with a magnet that maintains an air gap so that the main body can travel stably.

The grinding means includes a work table provided on the side of the main body, a grinding pad connected to the work table by a shaft to grind the weld portion of the rack and the core, and a motor electrically connected to the shaft to rotate the grinding pad .

The work table of the grinding unit may be provided with an angle adjusting unit for adjusting the grinding angle according to the inner shape of the rack and the core.

The angle adjuster is provided with an upper work table and a lower work table that divides the work table into upper and lower parts, and a guide groove is provided on the inner side of the lower work table, And guide rollers guided along the guide grooves by driving of the guide rollers.

The grinding pads may be installed in a plurality of positions above and below the work table so that multiple faces of the welds can be simultaneously operated.

The main body may be provided with monitoring means for monitoring the operation status of the grinding apparatus.

The monitoring means includes a camera installed in the main body for photographing a work situation, a lamp for illuminating the inside of the rack and the core, a control unit electrically connected to the camera and the illumination lamp, and a controller And a monitoring unit capable of confirming the situation.

The camera and the illumination lamp may be installed in the main body so as to accurately grasp the work situation of the welding part of the rack and the core.

According to another aspect of the present invention, the welded portion of the rack and the core of the jack-up leg is grinded by a grinding device, and the multiple faces of the welded portion are moved simultaneously by the grinding means, And can be provided with an offshore structure having a leg welding portion grinding device of a jack-up rig so as to grasp a working situation in real time through monitoring means.

As described above, according to the grinding apparatus for a leg welded portion of a jack-up rig according to the present invention, since the multiple surfaces of the welded portion can be grinded simultaneously while freely moving the inside of the rack and the core, the welded portion can be quickly and completely grinded, It is possible to secure the reliability of the inspection and minimize the construction period due to the inspection result.

1 is a structural schematic view of a conventional leg rotating device.
2 is a perspective view illustrating a grinding apparatus for a leg weld according to the present invention.
3 is a front view showing a grinding apparatus for a leg weld according to the present invention.
4 is a front view showing a width-adjusted state of a grinding apparatus for a leg weld according to the present invention.
5 is an operational state view showing an example of a leg welding portion grinding apparatus according to the present invention.
6 is a front view showing a traveling means of a grinding apparatus for a leg weld according to the present invention.
7 is a front view showing a grinding means of a grinding apparatus for a leg weld according to the present invention.
8 is a flow chart showing the monitoring means of the grinding apparatus of the leg weld according to the present invention.
9 is a perspective view showing an operation state of a grinding apparatus for a leg weld according to the present invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a perspective view illustrating a grinding apparatus for a leg weld according to the present invention, FIG. 3 is a front view showing a grinding apparatus for a leg weld according to the present invention, FIG. 4 is a cross- 6 is a front view showing a running means of a leg welded part grinding apparatus according to the present invention, and Fig. 7 is a front view showing a leg welding portion grinding apparatus according to the present invention, FIG. 8 is a flow chart showing the monitoring means of a grinding apparatus for a leg weld according to the present invention, and FIG. 9 is a flowchart showing the operation of a grinding apparatus for a leg welded portion according to the present invention Fig.

2 to 9, a leg welding portion grinding apparatus for a jack-up leg according to the present invention includes a main body 100, a traveling means 200, a grinding means 300, and a monitoring means 400 .

The main body 100 moves into the racks 10 and the chord 20 according to the operation of the driving means 200 and is installed in the form of a square bar.

The main body 100 is provided with a plurality of grooves 101 through which the traveling means 200 can be installed.

As shown in FIG. 4, the main body 100 is provided with a width adjusting unit 110 to adjust the width of the main body 100 according to the size of the core 20.

The width adjusting unit 110 can adjust the width of the body 100 in an antenna manner while the body 100 is divided into a plurality of units and can fix the plurality of bodies 100 by a bolting method.

At this time, the bolting method is a method of fastening and fixing a general bolt, and a detailed description thereof will be omitted.

That is, the main body 100 can be provided in a rectangular bar shape, and the width of the main body 100 can be adjusted by the width adjusting part 110, so that it can be adjusted to the internal area of the core 20.

A side guide 120 is installed in the main body 100 so that the main body 100 can safely run without moving during the traveling of the inside of the rack 10 and the core 20 by the operation of the traveling means 200, .

The side guide 120 includes a support base 121 installed on the main body 100 and a support plate 122 installed at an end of the support base 121 to be in close contact with a wall surface of the core die 20. [ do.

Since the side guide 120 is installed on the main body 100, the support plate 122 installed on the support base 121 is brought into close contact with the inner wall surface of the core die 20, When the main body 100 travels in the core 20, the side guides 120 hold the main body 100 so that the main body 100 does not shake.

The side guides 120 may be installed on the upper and side surfaces of the main body 100 to maximize the safety of the main body 100 when traveling.

That is, since the side guides 120 are provided on the upper and the side surfaces of the main body 100, when the main body 100 is running while grinding the welded portion with the grinding means 300, the main body 100 is prevented from being pushed or shaken from the welded portion .

The traveling means 200 can be installed in the main body 100 to move the main body 100 within the rack 10 and the core 20.

6, the traveling means 200 includes a rotating shaft 210 installed in the groove portion 101 of the main body 100, a motor M, and a traveling wheel 220. As shown in FIG.

The rotary shaft 210 is installed through the left and right grooves 101, respectively.

The motor M is electrically connected to the rotating shaft 210.

The traveling wheel 220 is installed outside the rotary shaft 210 and protrudes outside the groove 101.

A rotating shaft 210 is electrically connected to the motor M and a traveling wheel 220 is installed on the rotating shaft 210 so that the rotating shaft 210 rotates according to the driving of the motor M, And the main body 100 can be moved while the traveling wheel 220 is rotated by the rotation of the rotating shaft 210.

Also, as shown in FIG. 5, the traveling wheel 220 is provided with a magnet 230 that maintains a gap so that the main body 100 can travel stably.

The grinding means 300 is installed on one side of the main body 100 to grind the welded portion between the rack 10 and the core 20.

7, the grinding unit 300 includes a work table 310 installed on the main body 100, a grinding pad 320, and a motor M for rotating the grinding pad 320 .

The work table 310 is installed on the side of the main body 100 and is divided into upper and lower work bases 310a and 310b.

The angle of the grinding unit 300 may be adjusted by guiding the grinding pad 320 according to the inner shape of the rack 10 and the core 20, Respectively.

The angle adjuster 340 includes a guide groove 341 provided on the inner surface of the lower work table 310b and a guide groove 341 provided below the upper work table 310a0, And a guide roller 342 connected to the motor M and guided along the guide groove 341 by driving of the motor M.

At this time, the guide groove 341 and the guide roller 342 can be installed in a gear shape.

When the motor M is driven, a guide roller 342 connected to the motor M is guided along the guide groove 341 so that the upper work table 310a can be guided in the lower work table 310b The grinding angle of the grinding means 300 can be adjusted by adjusting the position of the grinding pad 320.

The grinding pad 320 is installed on the work table 310 and connected to the shaft 330 so as to be rotated by driving the motor M.

That is, the shaft 330 is connected to the work table 310 and the grinding pad 320 is installed on the shaft 330, so that the shaft 330 is rotated according to the driving of the motor M, So that the welded portion between the rack 10 and the core 20 is grinded.

In addition, the grinding pad 320 is installed in the work table 310 to grind multiple surfaces of the welded joint at the same time.

That is, the grinding pads 320 are installed on the upper workbench 310a and the lower workbench 310b, respectively.

The motor M is electrically connected to the shaft 330 to which the grinding pad 320 is connected to rotate the shaft 330 to rotate the grinding pad 320.

The monitoring means 400 may be installed in the main body 100 to monitor the operation status of the grinding apparatus in real time.

8, the monitoring means 400 may include a camera 410 installed in the main body 100 and configured to photograph a work situation of a welding portion between the rack 10 and the core 20, A lamp 420 which is electrically connected to the camera 410 and the illumination lamp 420 to control the image captured by the camera 410, And a controller 430 for turning on / off the power of the illumination lamp 420.

The monitoring unit 400 further includes a monitoring unit 440 that allows the camera 410 to check the operation status of the camera 410 in real time under the control of the controller 430.

The camera 410 and the illumination lamp 420 are installed at least one or more in the main body 100 so as to accurately and efficiently grasp and carry out the grinding operation situation of the welding portion welded between the rack 10 and the core 20 Respectively.

According to another aspect of the present invention, a rack 10 and a core 20 are welded and a rack 10 and a core 20 are welded to each other, The grinding means 300 grinds the welded portion while traveling inside the core 10 and the core 20 so that the spatters and foreign matter of the welded portion can be quickly and completely removed. .

In other words, a running means 200 is installed in the main body 100 which is moved into the rack 10 and the core 20 to move the main body 100 and to adjust the angle of the main body 100 The grinding means 300 for grinding the welded portion of the rack 10 and the core 20 is provided while the angle of the grinding means 300 is adjusted while the angle of the grinding means 300 is adjusted by the angle of the grinding means 300, 20 can be smoothly run, and the entire surface of the welded portion can be grinded and monitored according to the operation of the grinding means 300 while adjusting the grinding angle by the angle adjusting portion 340, thereby performing the grinding operation efficiently It can be applied to all marine structures that can minimize the reliability and construction period of welding defect inspection.

The operation of the jack-up leg grinding apparatus of the present invention having the above-described structure will be described below.

The grinding apparatus according to the present invention is installed inside the rack 10 and the core 20 to grind welds to inspect welding defects in the welds between the rack 10 and the cored 20.

At this time, the driving wheel 220 is rotated while the rotation shaft 210 is rotated by the driving of the motor M, and the main body 100 is rotated by the rotation of the traveling wheel 220 to rotate the rack 10 and the core 20, And is moved inside.

When the main body 100 is moved according to the operation of the traveling means 200, the grinding pad 320 is rotated by the driving of the motor M so that the welding position between the rack 10 and the core 20 Spatter, foreign matter, etc. of the fuel cell.

When the grinding means 300 grinds the welded portion of the core 10 and the rack 10 while the main body 100 moves, the angle of the grinding pad 320 is adjusted by the angle adjusting portion 340 The inner shape of the rack 10 and the core 20 can be matched to maximize the grinding efficiency.

When the main body 100 is loaded into the rack 10 and the core 20 for grinding the welded portion of the rack 10 and the core 20 with the grinding means 300, The left and right widths of the main body can be adjusted by the width adjusting portion, so that it is possible to perform work with a single grinding apparatus regardless of the size of the cores.

When the main body 100 is moved by the operation of the traveling means 200, the gap is maintained by the magnets 230 and the side guides 120 installed on the traveling wheels 220, The work can be performed even if the inside of the rack 10 and the inside of the core 20 are narrow and long through the side guide 120 and the traveling wheel 220.

The grinding means 300 may operate to grind the welded portion of the rack 10 and the cored 20 so that the illumination lamp 420 illuminates the welding portion and the camera 410 photographs the welding operation, The control unit 430 controls the monitoring unit 440 to monitor the photographed image of the camera 410 so that the operator can grasp the operation status in real time.

As described above, the present invention is not limited to the above-described specific preferred embodiments, and any person skilled in the art can make various modifications without departing from the gist of the present invention. It is to be understood that such changes and modifications are intended to fall within the scope of the appended claims.

10: rack 20: cored
100: main body 101:
110: width adjuster 120: side guide
121: support member 122:
200: traveling means 210: rotating shaft
220: traveling wheel 230: magnet
300: grinding means 310: work table
310a: Upper workbench 310b: Lower workbench
320: Grinding pad 330: Shaft
340: Angle adjusting portion 341: Guide groove
342: guide roller 400: monitoring means
410: camera 420: illumination light
430: control unit 440:

Claims (15)

A body for grinding the welds of the rack and the cores while moving into the racks and cores of the legs;
A traveling means provided inside the main body and capable of moving the main body within the rack and the core; And
A grinding means installed at one side of the main body for grinding a welded portion of the rack and the core;
Up leg of the jack-up rig. The method according to claim 1,
Wherein the main body is provided in the form of a square bar so as to enter and move into the rack and the core, and a plurality of grooves are formed so that the traveling means can be installed up and down. The method according to claim 1,
Wherein a side guide closely attached to the inner wall surface of the core is installed on the outer side of the main body so as to increase the safety during traveling of the inside of the rack and the core. The method of claim 3,
The side-
A support table installed on the main body; And
A support plate installed at an end of the support and being in close contact with the inner wall of the core;
Up leg of the jack-up rig. The method of claim 3,
Wherein a plurality of side guides are installed on the top and side surfaces of the main body. The method according to claim 1,
Wherein the main body is provided with a width adjuster for adjusting the width of the main body in accordance with the size of the core. The method according to claim 1,
The traveling means comprises:
A rotating shaft installed in the groove of the main body;
A motor electrically connected to the rotating shaft to rotate the rotating shaft; And
A traveling wheel installed on the rotating shaft to move the main body by a rotating shaft rotated by driving of the motor;
Up leg of the jack-up rig. 8. The method of claim 7,
Wherein the traveling wheel is provided with a magnet for maintaining a gap so that the main body can travel stably. The method according to claim 1,
Wherein the grinding means comprises:
A work table provided on a side of the main body;
A grinding pad connected to the work table by a shaft to grind welds of the rack and the cored; And
A motor electrically connected to the shaft to rotate the grinding pad;
Up leg of the jack-up rig. 10. The method of claim 9,
Wherein the work table is provided with an angle adjusting portion for adjusting the grinding angle according to the inner shape of the rack and the core. 11. The method of claim 10,
The angle adjuster is provided with an upper work table and a lower work table that divides the work table into upper and lower parts, and a guide groove is provided on the inner side of the lower work table, And a guide roller guided along the guide groove by driving of the guide groove. 10. The method of claim 9,
Wherein the plurality of grinding pads are installed on the top and the bottom of the work table so that multiple surfaces of the welding portion of the rack and the core can be simultaneously operated. The method according to claim 1,
Wherein the main body is provided with monitoring means for monitoring the operation status of the grinding apparatus. 14. The method of claim 13,
Wherein the monitoring means comprises:
A camera installed in the main body and photographing a work situation;
An illuminating lamp for illuminating the inside of the rack and the core;
A control unit electrically connected to the camera and the illumination lamp; And
A monitoring unit which can check a work situation photographed by a camera under the control of the control unit;
Up leg of the jack-up rig. 15. The method of claim 14,
Wherein the camera and the illumination lamp are installed in at least one or more than one of the main body and the main body so as to accurately grasp the work situation of the welding part of the rack and the core.
KR1020150125612A 2015-09-04 2015-09-04 Grinding apparatus for leg welding of jack-up rig KR101798015B1 (en)

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KR1020150125612A KR101798015B1 (en) 2015-09-04 2015-09-04 Grinding apparatus for leg welding of jack-up rig

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Application Number Priority Date Filing Date Title
KR1020150125612A KR101798015B1 (en) 2015-09-04 2015-09-04 Grinding apparatus for leg welding of jack-up rig

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KR101798015B1 KR101798015B1 (en) 2017-11-15

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112518463A (en) * 2020-11-30 2021-03-19 湖北宜翔建设有限公司 Terrazzo surface polishing treatment equipment
KR102235220B1 (en) * 2019-10-25 2021-04-01 오창윤 Sink bowl welding part grinding machine
CN113021147A (en) * 2021-03-06 2021-06-25 韩鸿羽 LED lamp processing system and processing method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130139613A (en) 2012-06-13 2013-12-23 삼성중공업 주식회사 Grinding device for pipe welding part

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3631897B2 (en) * 1998-02-03 2005-03-23 三菱重工業株式会社 Grinding equipment

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130139613A (en) 2012-06-13 2013-12-23 삼성중공업 주식회사 Grinding device for pipe welding part

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102235220B1 (en) * 2019-10-25 2021-04-01 오창윤 Sink bowl welding part grinding machine
CN112518463A (en) * 2020-11-30 2021-03-19 湖北宜翔建设有限公司 Terrazzo surface polishing treatment equipment
CN113021147A (en) * 2021-03-06 2021-06-25 韩鸿羽 LED lamp processing system and processing method

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