KR101558157B1

KR101558157B1 - TIG Welding Torch

Info

Publication number: KR101558157B1
Application number: KR1020140115327A
Authority: KR
Inventors: 황원규
Original assignee: 황원규
Priority date: 2014-09-01
Filing date: 2014-09-01
Publication date: 2015-10-08
Also published as: WO2016035957A1; CN105364358A

Abstract

The present invention relates to a tungsten inert gas (TIG) welding torch. According to the present invention, the TIG welding torch comprises: a torch handlebar equipped with an operating switch; a coupling frame coupled to a coupling part bent to be rotated at a certain position outside the torch handlebar; a pair of side frames composed of a welding head coupled to the coupling frame to upwardly and downwardly be moved wherein a pair of supporting parts extended in parallel with the welding head are protruded on an end part of the coupling part, and the coupling frame is equipped with an engagement bolt engaged to the engagement holes formed on both sides of the coupling part; upper and lower frames respectively coupled to an upper part and a lower part of a pair of side frames to mutually connect a pair of side frames, and is equipped with a hollow through which the welding head may pass; a pair of coupling grooves divided to be coupled to a circumferential surface of the welding head and coupled to a pair of side frames; and a connecting block inserted between the upper frame and a pair of side frames.

Description

TIG Welding Torch

The present invention relates to a teg welding torch, and more specifically, to a teg welding torch capable of uniformly forming a gap between a membrane plate and a bead at a welded portion when welding a LNG carrier membrane.

In general, LNG carriers are high value-added vessels for transporting Liquefied Natural Gas (LNG) through sea. They are classified according to the type of Cargo Containment System. They are classified into Independent Tank Type, And membrane type LNG line. The independent tank type LNG carriers are independent of the cargo tanks, the supporting parts thereof, and the hull, which is the ship body, and are typically of the Moss Type and the Type S.P.B. The membrane type LNG carriers are made of gas transport (GT, NO96) type and Technigaz (TGZ, Mark-III) types by installing heat dissipation materials directly on the hull. It is widely recognized that the ship has a wide viewing area and low land area during operation. This membrane-type LNG line is effective for weight reduction and strength improvement in that it is made of a double plate as compared to a single plate material. Therefore, the insulation panel, which is a secondary barrier, and the membrane, which is a thin metallic material, To form a double structure.

As shown in FIG. 1, the plate-like materials 10 and 10 'forming the membrane are stacked and then manually spaced by manually adjusting the spacing between the plates using the manual jig 1. [ The welding is performed such as plasma automatic welding or manual TIG welding after forming the contact portion 11.

However, GTT, which has developed the membrane-type LNG wire for the first time, strictly requires that the gap between two plates formed during the membrane joint lap welding be within 0.3 mm. This is to minimize the defects generated in the welding process such as plasma automatic welding or manual TIG welding. If the gap between the plate materials is large, formation of weld beads at that portion is not smooth and defects are easy to occur . Accordingly, in order to maintain a predetermined distance between the plate materials, the interval between the plate materials is minimized by using a hammer or a block using a TIG welding machine, but it is very difficult to control the accuracy of the plate material.

Further, since the specification of the bead size of the welded portion is not specially designated, there is a problem that the welding quality varies depending on the skill of the operator. That is, welding defects due to quality deterioration of the abutment itself may occur depending on the skill level of the operator, or the bead size of the welded portion may be excessively large or small, resulting in weld joining in subsequent welding.

In other words, the welding of the LNG carrier membrane may determine the gap between the plate materials and the bead condition of the welded portion depending on the skill of the operator, and may adversely affect subsequent weldability due to the good or bad condition of the welded portion.

Accordingly, it is an object of the present invention to solve the above-mentioned problems, and it is an object of the present invention to improve the productivity and workability by uniformly forming the gap between the membrane plates and the bead at the welded portion without being greatly influenced by the skill of the operator in welding the LNG carrier membrane. The present invention relates to a welding torch for welding a welding torch.

In order to achieve the above and other objects of the present invention, according to an embodiment of the present invention, there is provided an image forming apparatus including a torch handle provided with an operation switch, a coupling frame rotatably coupled to a coupling portion formed at a predetermined position on an outer surface of the torch handle, And a pair of support portions extending in parallel with the welding head are formed at the ends of the coupling frame so as to protrude from both sides of the coupling portion, A pair of side frames provided with fastening bolts to be fastened to the fastening holes formed therein, and upper and lower portions of the pair of side frames, respectively, to interconnect the pair of side frames, An upper and a lower frame provided with a hollow and having a shape divided into two halves joined to the outer circumferential surface of the welding head, Of providing a TIG welding torch which comprises a connection block which is interposed between a pair of bonding sphere, the side frame of the pair and the top frame of which is coupled to the side frame.

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Wherein the pair of side frames are provided with guide grooves, and the pair of engagement holes are provided with guide protrusions slidably inserted into the guide grooves, wherein one of the pair of guide protrusions And the rotary shaft is screwed through the through hole formed in any one of the through holes, and the connection block is provided with a press hole for pressing the outer circumferential surface of the rotary shaft inserted through the through hole.

And a locking groove is formed at a predetermined position in the longitudinal direction of the rotary shaft.

And the supporting roller is slidably coupled to the coupling portion along the height direction.

And the auxiliary handle is formed on the torch handle.

According to the present invention having the above-described configuration, it is possible to uniformly form the gap between the membrane plates and the bead at the welded portion without being greatly influenced by the skill of the operator in welding the LNG carrier membrane, thereby improving the productivity and workability .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a state where a bonded portion is formed on a membrane plate for an LNG carrier. FIG.
2 is a side cross-sectional view schematically illustrating a teg welding torch according to an embodiment of the present invention.
3 is an exploded perspective view of the coupling frame shown in Fig.
4 is a sectional view showing slide movement of the welding head shown in Fig. 2;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

Fig. 2 is a side sectional view schematically showing a teg welding torch according to an embodiment of the present invention, Fig. 3 is an exploded perspective view of the coupling frame shown in Fig. 2, Fig.

Referring to FIGS. 2 to 4, the TG welding torch 100 according to an embodiment of the present invention includes a plurality of plate members for forming a membrane when welding a LNG carrier membrane, and then moves along the overlapped portion between the plate member and the plate member. A welding frame 120 and a welding head 140. The welding frame 110 is formed of a metal plate,

The torch grip 110 is a portion gripped by an operator during welding, and an operation switch 112 is provided at a predetermined position on the outer surface. In the inside of the torch handle 110, a power supply cable for supplying power to a welding head 140, which will be described later, and a gas supply pipe for supplying an inert gas to the welding head 140, (Not shown).

Here, the engaging portion 116 is bent at a predetermined position on the outer surface of the torch handle 110, and the engaging frame 120, which will be described later, is rotatably coupled to the engaging portion 116.

The coupling portion 116 is provided with a support roller 118 for supporting the torch handle 110 with respect to the plate material so that the welding torch 100 can be easily moved along the overlapping portion between the plate material 10 and the plate material 10 ' do.

At this time, the support roller 118 is preferably coupled to the elongated hole 116a formed in the engaging part 116 so as to be slidable along the height direction of the engaging part 116. [

The auxiliary handle 119 is formed on the torch handle 110. This allows the operator to grip the auxiliary handle 119 with the other hand after grasping the torch handle 110 with one hand, 100) can be stably held by the operator.

The coupling frame 120 is rotatably coupled to the coupling portion 116 formed in the torch handle 110 so that the welding head 140 described below is coupled to the coupling portion 116 of the torch handle 110.

The coupling frame 120 includes a pair of side frames 122 having fastening bolts 122a fastened to fastening holes 116b formed on both sides of the coupling portion 116 and a pair of side frames 122 And upper and lower frames 124 and 126 having hollows 124a and 126a to allow the welding head 140 to pass therethrough, A pair of coupling holes 128 formed in a shape divided into two halves so as to be coupled to the outer circumferential surface of the welding head 140 and coupled to the pair of side frames 122, And a connecting block 129 which is interposed between the connecting blocks.

A pair of support portions 127 extending in parallel with the welding head 140 to be described later are protruded from the lower frame 126 at an end of the coupling frame 120. The pair of supports 127 When the welding head 140 forms the welding portion 11 at a predetermined distance from the overlapping portion between the plate 10 and the plate 10 ', the distance between the welding head 140 and the overlapping portion between the plate and the plate 10' To be constantly maintained.

A guide groove 122b is formed in the pair of side frames 122 and a guide protrusion 128a is formed in the pair of engagement holes 128 to be slidably inserted into the guide groove 122b. So that the welding head 140 coupled to the coupling portion 128 of the pair is slid along the height direction of the coupling frame 120.

Here, the rotation shaft 130 is screwed into one of the pair of guide protrusions 128a through the through hole 129a formed in any one of the connection blocks 129, and the connection block 129 is provided with a through hole And a pushing portion 129b for pushing the outer circumferential surface of the rotating shaft 130 inserted through the through hole 129a.

At this time, it is preferable that a locking groove portion 130a is formed at a predetermined position in the longitudinal direction of the rotary shaft 130 so that the end portion of the pressing hole 129b is engaged.

4, one end of the rotation shaft 130 is brought into contact with the lower frame 126, and then the rotation shaft 130 is rotated clockwise The pair of engagement openings 128 are slid toward the upper frame 124. In this way,

In contrast, when the pair of coupling holes 128 are slid toward the lower frame 126, the coupling groove 129 formed at a predetermined position in the longitudinal direction of the rotary shaft 130 is inserted into the connection block 129 When the rotary shaft 130 is rotated in the counterclockwise direction after the pressing groove 129a is pressed and the pressing groove 129a is rotated by positioning the rotary shaft 130a in the same line as the hole 129b, (Not shown).

That is, the pair of coupling holes 128 are slid toward the upper and lower frames 124 and 126 in accordance with the rotation direction of the rotary shaft 130, so that the welding heads 140 Are also moved up and down while sliding along the height direction of the coupling frame 120.

The welding head 140 is formed as a welded portion spaced apart from the plate material by a predetermined distance. The welding head 140 is coupled to the coupling frame 120 through a pair of coupling holes 128 so as to be movable up and down. As such, the welding head 140 is a well-known technique, and a detailed description thereof will be omitted.

Accordingly, the TIG welding torch according to one embodiment of the present invention can improve the productivity and workability by uniformly forming the gap between the membrane plates and the bead at the welded portion without being greatly affected by the skill of the operator at the time of welding the LNG carrier membrane. There is an effect that can be made.

Although the preferred embodiments of the present invention have been described with reference to the accompanying drawings, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit of the invention It can be understood that it is possible.

110; Torch handle 127; Support
112; Operation switch 130; Rotating shaft
114; Space portion 130a; [0035]
116; A coupling portion 140; Welding head
116a; Long hole
116b; Fastening hole
118; Support roller
119; Auxiliary handle
120; Coupled frame
122; Side frame
122b; Guide groove
122a; Fastening bolt
124, 126; The upper and lower frames
124a; 126a; Hollow
128; Junction
128a; Guide projection
129; Connection block
129a; Through hole
129b; Pressurizer

Claims

A torch handle with an actuation switch;
A coupling frame rotatably coupled to a coupling portion formed at a predetermined position on an outer surface of the torch handle; And
And a welding head vertically movably coupled to the coupling frame,
A pair of support portions extending in parallel to the welding head are formed at the ends of the coupling frame,
The coupling frame includes:
A pair of side frames each having a fastening bolt to be fastened to a fastening hole formed on both sides of the fastening portion and a pair of side frames connected to the upper and lower portions of the pair of side frames, And a pair of coupling members coupled to the pair of side frames so as to be coupled to the outer circumferential surface of the welding head and being divided into two halves so as to allow the head to pass therethrough, And a connecting block interposed between the pair of side frames.

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The method according to claim 1,
A guide groove is formed in the pair of side frames, and a guide protrusion is formed in the pair of engagement openings so as to be slidably inserted into the guide groove,
Wherein one of the pair of guide protrusions is screwed to a rotating shaft through a through hole formed in any one of the connecting blocks, and the connecting block is provided with a pushing means for pressing an outer circumferential surface of the rotating shaft inserted through the through hole Wherein the torsionally deformable member is provided with a torsion spring.

The method of claim 3,
And a latching groove portion is formed at a predetermined position in the longitudinal direction of the rotary shaft so that an end portion of the pressing tool is engaged.

The method according to claim 1,
And the supporting roller is slidably coupled to the coupling portion along the height direction.

The method according to claim 1,
And an auxiliary handle portion is formed on the torch handle.