KR20030050749A - Auto welding assembly for anchoring flat bar welding of LNG Carrier - Google Patents

Abstract

The present invention relates to an anchoring bar automatic welding device for LNG ships configured to allow continuous welding and intermittent welding in both sides of the anchoring bar attached to the inner wall of the cargo hold to perform the insulation work of the LNG carrier cargo hold.

The present invention has a box-shaped shape while the driving motor 50 and the carrying handle 200 are installed on the upper side, and the front and rear wheel shafts 80 and 70 are symmetrically on the front and rear portions of the lower side. It is formed and the lower side of the central portion is a permanent trolley (190) is mounted to the left and right symmetrically running bogie 40, the bevel gear is mounted in the middle portion, and both ends are provided with a first belt pulley (62) symmetrically installed The driven shaft 60 connected to the driving unit of the motor 50, the lower side rear portion of the traveling truck 40 is formed symmetrically on both sides with respect to the center axis, and one side is provided with wheels 74 and bearings at both ends. 78 is inserted into the rear wheel shaft 70, the second belt pulley 72 is mounted on the other side, the lower side of the front side of the running cart 40 is formed symmetrically on both sides, the rear wheel shaft The third belt pulley 82 connected with the second belt pulley 72 of 70 The front wheel axle 80 is mounted, the fixed roller 90 is mounted on the left side with respect to the center axis in the middle front portion of the traveling cart 40, and the center axis in the middle front portion of the traveling cart 40 is referred to. Pressing roller 100 is mounted to be able to reciprocate to the left and right on the left side, having a cross-sectional shape of the 'ㅓ' shape is formed on the body threaded pressure handle 110 is coupled to the pressure roller 100, X-axis symmetrically installed on both sides of the upper side of the pressing spring 120, the driving bogie 40, which is installed to increase the buffering force and fixing force to the coupling portion of the pressure handle 110 and the pressure roller 100 Weaving motor 130 and the symmetrical mounting on both sides of the upper surface of the conveying device 210 and the Y-axis conveying device 220, the traveling bogie 40 to enable the reciprocating circular motion of the welding torch 160 and Weaving gear box 140, mounted on the drive of the weaving gear box 140 Characterized in that it is composed of a torch clamp 150 formed to be coupled to the welding torch 160.

Description

Auto welding assembly for anchoring flat bar welding of LNG Carrier}

The present invention relates to an automatic welding device for attaching an anchoring bar to an inner wall of a cargo hold of an LNG carrier, and more particularly, two-sided welding and continuous welding and intermittent welding operations are performed while moving along the anchoring bar in the shape of a plate bar. The present invention relates to an anchoring bar automatic welding device for LNG carriers, which is configured to be possible.

In general, natural gas carriers (hereinafter referred to as LNG carriers) store liquefied natural gas (LNG, Liquefied Natural Gas, hereinafter referred to as LNG) by liquefying gaseous natural gas at -163 ° C. It is a ship to transport.

The cargo hold of the LNG carrier is made of aluminum only because of the property of maintaining rigidity even at extremely low temperatures.

The cargo carrier formation method of the LNG carrier is used a lot of the old independent tank method and membrane type (aka diaphragm type), the old independent tank method is named Moss (Moss), the membrane type is named after the developer's name It's called Technigas and Gas Transport.

The spherical independent tank method is a method of manufacturing a ball-shaped tank having a diameter of 40 m with aluminum after it is first dried, and supporting a waist of medium height to fix the vessel to the vessel. It has the advantage of low stress concentration point in manufacturing or use.

However, since the ground height of the vessel is increased and receives a lot of wind during the operation of the vessel, the steering and mooring mooring device has to be strengthened.

The membrane method is a good way to keep warm on the inner wall of the cargo hold of the ship without making a separate tank, and the heat insulating surface is sealed with a thin metal plate, while the hull is reduced to an optimized size and the installation of special equipment is unnecessary It has the disadvantages that many stress concentration points are used during fabrication or use, and damage factors such as stranding in case of collision outside the hull are to be avoided.

The difference between the membrane type technigas formula and the gas transport formula lies in the construction and construction method of the insulation.

1 is a view showing the interior of the LNG carrier cargo hold is attached to the anchoring bar, Figure 2a is a view showing the attachment state of the anchoring bar, Figure 2b is a cross-sectional view showing part A-A of Figure 2a.

As shown in the figure, in order to construct a Cargo Tank so Containment to install the insulation material in the LNG carrier cargo hold (1) to the outer surface and bottom surface of the cargo hold (1) plate bar-shaped anchoring bar (2) is attached in the vertical direction.

Since the material of the base material 3 forming the cargo hold 1 is a general steel material and the material of the anchoring bar 2 is a stainless steel material, carbon dioxide welding is used to weld dissimilar metals.

The anchoring bar attached to the inside of the cargo hold with the configuration as described above takes too much work time because the operator performs the welding work manually, delaying the subsequent process after welding of the anchoring bar, and welding both sides of the member at the same time Due to the deformation of the member generated during single-sided welding due to the impossibility of double-sided welding, correction work is inevitable after the welding operation, and excessive post-processing work is generated.

In addition, when the worker performs welding work using both hands alternately in a narrow work space, the welding work cannot be performed accurately, and thus the welding work cannot be performed correctly, resulting in a poor welding condition, resulting in decreased productivity. Since welding work must be performed with the welding machine in a narrow space, there is a problem that a safety accident may be caused by an unsafe element of the working environment.

An object of the present invention devised to solve the above problems is to configure the two-sided welding, continuous welding and intermittent welding while automatically moving along the anchoring bar, so that the operator does not work directly in a narrow space. Since the work is carried out by button manipulation, the welding work is precisely performed to improve the welding quality and to prevent safety accidents during the welding work.

In order to achieve the object of the present invention as described above, the welding torch is mounted on both ends of the traveling bogie and the welding bogie formed to enable the front and rear reciprocating movement along the anchoring bar and the joint surface of the anchoring bar at the same time; An anchoring bar automatic welding device for an LNG carrier comprising a weaving mechanism part and a control unit for controlling the traveling cart and the welding mechanism part.

BRIEF DESCRIPTION OF THE DRAWINGS The figure which shows the internal view of the LNG carrier cargo hold with an anchoring bar attached.

2A is a view showing an attachment state of an anchoring bar.

FIG. 2B is a sectional view of a portion A-A in FIG. 2A;

Figure 3 is a front view showing the anchoring bar automatic welding device of the LNG carrier according to an embodiment of the present invention.

4 is a view showing a fastening state of the automatic welding device and the anchoring bar according to an embodiment of the present invention.

5 is a plan view of FIG.

6 is a side view of FIG. 3;

7 shows the weaving operation of a welding torch.

8 is a view showing the operation of the anchoring bar automatic welding device of the LNG carrier according to an embodiment of the present invention.

<Brief description of symbols for the main parts of the drawings>

10: cargo hold 20: anchoring bar

22: base material 30: automatic welding device

40: running cart 50: running motor

60: driven shaft 62: first belt pulley

70: rear wheel axle 72: second belt pulley

74: wheel 78: bearing

80: front wheel axle 82: third belt pulley

90: fixed roller 100: pressure roller

110: pressure handle 120: pressure spring

130: weaving motor 140: weaving gear box

150: torch clamp 160: welding torch

170: control unit 180: timing belt

190: permanent magnet 200: carrying handle

210: X axis feeder 220: Y axis feeder

With reference to the accompanying drawings will be described in detail with respect to the automatic welding device anchoring bar of the LNG carrier according to an embodiment of the present invention.

3 is a front view showing an anchoring bar automatic welding device of the LNG carrier according to an embodiment of the present invention, Figure 4 is a view showing a fastening state of the automatic welding device and the anchoring bar according to an embodiment of the present invention, 5 and 6 are a plan view and a side view of FIG.

As shown in the figure, the anchoring bar 20 of the plate bar shape is attached to the inner surface of the cargo hold 10 in the preceding process for constructing the insulation work in the LNG carrier cargo hold 10, the anchoring bar ( In order to fix 20, an automatic welding device 30 is formed which is capable of vertical, horizontal and back welding.

The automatic welding device 30 is largely fixed to the upper side of the anchoring bar 20, the traveling bogie 40 capable of reciprocating back and forth, the welding mechanism unit equipped with the weaving device and the welding torch 160 and the traveling It is formed of a control unit 170 for controlling the cart 40 and the welding mechanism.

In addition, the traveling cart 40 may include a traveling part and a pressure roller 100 and a fixed roller that reciprocate in the front and rear direction using the driving motor 50, the driven shaft 60, the timing belt 180, and the belt pulley. 90) and the permanent magnet 190 is formed as a fixing portion for fixing to the anchoring bar (20).

In the traveling part configuration of the traveling cart 40, a traveling motor 50 is installed on the upper side of the traveling cart 40 having a box shape, and a bevel gear is mounted on the driving part of the traveling motor 50.

A driven shaft 60 having a bevel gear mounted therein is connected to a driving unit of the driving motor 50, and first belt pulleys 62 are provided at both ends of the driven shaft 60 in both symmetrical directions.

The driven shaft 60 is connected to the second belt pulley 72 of the rear wheel shaft 70 formed at the lower rear portion of the traveling cart 40 using the timing belt 180.

A wheel 74 is installed at one side of the rear wheel axle 70, and bearings 78 are inserted at both ends fixed to the traveling cart 40 for smooth rotation, and at the other side, the driven shaft 60. And a second belt pulley 72 connected to the third belt pulley 82 formed on the front wheel shaft 80.

The second belt pulley 72 of the rear wheel axle 70 is connected to the first belt pulley 62 of the driven shaft 60 to drive the rear wheel axle 70, and at the same time the driving cart 40. It is formed to be connected to the third belt pulley 82 of the front wheel shaft 80 is installed in both sides symmetrical to the front of the four wheels can be driven simultaneously.

The front and rear wheel shafts 80 and 70 are formed symmetrically on both sides with respect to the central axis of the travel truck 40.

The carrying handle 200 is attached to the upper side of the traveling cart 40 for the operator to carry the automatic welding device 30.

An operation of the driving unit of the automatic welding device 30 drives the driving motor 50 installed at the center of the upper side of the driving truck 40, and the driven shaft connected to the driving unit of the traveling motor 50 using the bevel gear. 60 is rotated, and as the driven shaft 60 is rotated, the rear wheel shaft 70 connected to the timing belt 180 is rotated in conjunction, and the timing is obtained by rotating the rear wheel shaft 70. The front wheel shaft 80 connected by using the belt 180 is driven to form a reciprocating movement in the front-rear direction.

Permanent magnet 190 in the left and right symmetrical to the central portion of the lower side of the traveling cart 40 to be fixed to the anchoring bar 20 and the base material 22 attached to the vertical and rear and horizontally of the cargo hold 10 to prevent the fall. ) Is mounted.

The permanent magnet 190 is installed at regular intervals from the base material 22 is attached to the base material 22 with a magnetic force in a non-contact state.

However, since only the magnetic force of the permanent magnet 190 does not track the welding line during the welding operation, the anchoring bar 20 can be completely fixed to both sides of the anchoring bar 20 so as to completely fix the automatic welding device 30. Thus, the fixing roller 90 is mounted on the left side and the pressure roller 100 is mounted on the right side.

The fixed roller 90 is mounted on the left side with respect to the center axis in the middle front portion of the traveling cart 40, and the pressure roller 100 is mounted on the right side so as to reciprocate from side to side.

The pressure roller 100 has a cross-sectional shape having a 'ㅓ' shape and is coupled to a pressure handle 110 in which a thread is formed in the body, thereby reciprocating left and right as the pressure handle 110 is rotated.

A coupling spring 120 is installed at the coupling portion of the pressure handle 110 and the pressure roller 100 to increase the buffering force and the fixing force.

The fixing of the automatic welding device 30 having the above configuration is to attach the traveling cart 40 to the anchoring bar 20 and then contact the fixing roller 90 to one side of the anchoring bar 20. In this state, the pressure handle 110 is adjusted to fix the pressure roller 100 to the other side of the anchoring bar 20.

The welding mechanism part of the automatic welding device 30 is X-axis feeder 210 and Y at both ends of the traveling cart 40 so as to simultaneously weld both mating surfaces of the base material 22 and the anchoring bar 20. The shaft feeder 220 is installed, the weaving motor 130 and the weaving gear box 140 capable of weaving the welding torch 160 are installed symmetrically with respect to the central axis, and the weaving gear box ( The torch clamp 150 to which the welding torch 160 is fastened is installed at the driving unit of the 140.

As shown in FIG. 7, which shows the weaving operation of the welding torch, the welding bead does not flow during welding of the anchoring bar 20 attached to the weaving motor 130 and the weaving gear box 140 vertically or rearward. In order to improve the welding quality, the torch clamp 150 is connected to the drive shaft of the weaving gear box 140 so that the welding torch 160 may be repeatedly arced at regular intervals.

A control unit 170 for controlling the traveling trolley 40 and the welding mechanism portion having the above configuration is formed on the rear side of the traveling trolley 40.

The controller 170 may be configured to perform intermittent welding at predetermined intervals by counting a pulse signal of an encoder connected to the driving motor 50 so as to enable intermittent welding by setting a non-welding section and a welding section in advance.

In addition, by forming the weaving width and the weaving speed, the left and right stop time of each weaving device in advance is formed to enable vertical welding and back welding of the anchoring bar.

The anchoring bar automatic welding device of the LNG carrier according to an embodiment of the present invention having the configuration described above, as shown in Figure 8 showing the operation of the anchoring bar automatic welding device of the LNG carrier, the outer surface of the cargo hold 10 The welding work is performed while moving along the anchoring bar 20 vertically, horizontally and rearwardly attached to the floor and the bottom surface. In the horizontal fillet welding operation, the welding bend is blocked while the welding bead is not vertical, and the vertical block is blocked. The welding torch 160 can be weaved only during welding or back welding.

The present invention having the configuration as described above can be automatically welded during the welding operation of the anchoring bar to reduce the working time, double-sided welding is possible to eliminate the correction work by the thermal deformation of the welding member, It has the effect of solving the welding quality and the inconvenience of the welding operator.

Claims (1)

It has a box-shaped shape and the driving motor 50 and the carrying handle 200 are installed on the upper side, and the front and rear wheel shafts 80 and 70 are symmetrically formed on the front and rear portions of the lower side. The lower side center portion is provided with a traveling trolley 40 in which the permanent magnet 190 is symmetrically attached, and a bevel gear is mounted in the middle portion thereof, and a first belt pulley 62 is provided at both ends in symmetrical manner. Driven shaft 60 is connected to the driving unit of the), the lower side rear portion of the traveling truck 40 is formed symmetrically on both sides with respect to the central axis, and one side is provided with a wheel 74 and a bearing 78 at both ends. The rear wheel shaft 70 is inserted into the other side and the second belt pulley 72 is mounted, the rear wheel shaft 70 is formed on both sides of the lower side front portion of the traveling cart 40 to be symmetrical. Front with third belt pulley 82 connected to second belt pulley 72 of Wheel axle 80, a fixed roller 90 is mounted on the left side with respect to the center axis in the middle front portion of the travel cart 40, the middle of the front side of the travel cart 40 on the left side relative to the central axis Pressing roller 100, which is mounted to be reciprocated from side to side, having a cross-sectional shape of 'ㅓ' shape, the thread is formed on the body and the pressure handle 110 is coupled to the pressure roller 100, the pressure handle Pressing spring 120 is installed in the coupling portion of the 110 and the pressure roller 100 to increase the buffering force and fixing force, the X-axis feeder is installed symmetrically on both sides of the upper side of the traveling truck 40 ( Weaving motor 130 and the weaving gear box 210 and the Y-axis feeder 220, symmetrically mounted on both sides of the upper surface of the traveling bogie 40 to enable the reciprocating circular motion of the welding torch 160, 140 is mounted to the drive of the weaving gear box 140 welding torch (16) Anchor bar automatic welding device of the LNG carrier, characterized in that consisting of a torch clamp 150 is formed to enable the coupling of 0).