KR-200500326-Y1 - Clamping Unit and Welding Equipment having the same

KR200500326Y1KR 200500326 Y1KR200500326 Y1KR 200500326Y1KR-200500326-Y1

Abstract

The clamping unit of the present invention is a clamping unit that is fixed to a corrugated intersection provided in the barrier of a liquefied gas storage tank and has a travel rail installed to guide the movement of the welded part of a welding device, and may include: a body part on which the travel rail is installed; a gripping part that holds both sides of the corrugated intersection by means of a fixed block fixed to the body part and a movable block capable of moving forward or backward relative to the body part; a compression part that compresses the gripping part to the corrugated intersection; and a guide pin, one side of which is slidably connected to the fixed block and the other side of which is fixedly connected to the movable block, which prevents the up-down and left-right shaking of the movable block when the movable block moves forward or backward according to the operation of the compression part.

Inventors

황상수
최유환
조원제
김성수

Assignees

에이치디현대중공업 주식회사
에이치디현대삼호 주식회사
주식회사 티엠씨

Dates

Publication Date: 20260511
Application Date: 20240509

Claims (8)

A clamping unit that is fixed to a corrugated intersection provided in the barrier of a liquefied gas storage tank and has a travel rail installed to guide the movement of the welded part of a welding device, A body part on which the above-mentioned driving rail is installed; A gripping part that holds both sides of the corrugated intersection by means of a fixed block fixed to the body part and a movable block capable of moving forward or backward relative to the body part; A pressing part that presses the above-mentioned gripping part against the above-mentioned wrinkle intersection; and A clamping unit comprising a guide pin, one end of which is slidably connected to the fixed block and the other end of which is fixedly connected to the movable block, thereby preventing up-down and left-right shaking of the movable block when the movable block moves forward or backward according to the operation of the compression part.
In paragraph 1, the body part is, A clamping unit comprising guide rails formed on both sides to guide the above-mentioned fluid block to move forward or backward relative to the body part.
In paragraph 2, A clamping unit further comprising a guide plate that is movable in the forward and backward directions along the guide rail and is fixedly connected to the movable block.
In paragraph 1, the fixed block is, It includes a guide hole that allows sliding with the above guide pin inserted, and The above guide hole is, A clamping unit having an inner diameter corresponding to the outer diameter of the guide pin and formed to penetrate from the inner side to the outer side of the fixed block.
In paragraph 4, the above fixed block is, It includes a guide tube that prevents the guide pin from escaping from the guide hole to the outside, The above guide tube is, A clamping unit that protrudes a certain length from the guide hole on the inner side of the fixed block and has an inner diameter equal to the inner diameter of the guide hole.
In paragraph 4, the above-mentioned fluid block is, It includes an insertion groove and a coupling hole for fixing the guide pin slidably inserted into the guide hole, and The above insertion groove is, It has an inner diameter corresponding to the outer diameter of the guide pin and is formed to a certain depth from the inner side to the outer side of the flow block, and The above coupling hole is, A clamping unit formed to penetrate from the insertion groove to the outside of the fluid block to fix the guide pin inserted into the insertion groove by means of a fastening means.
In paragraph 1, the guide pin is, At least one gripping groove is provided on a part of the outer surface, and The above gripping groove is, A clamping unit capable of holding the guide pin with a gripping means so as not to move when the guide pin is fixed to the movable block.
A welding device equipped with the clamping unit according to any one of claims 1 to 7.

Description

Clamping Unit and Welding Equipment having the same The present invention relates to a clamping unit and a welding device including the same. Among storage tanks for storing liquefied gases such as LNG, a structure consisting of a primary barrier and a secondary barrier is widely used. The primary barrier of the liquefied gas storage tank comprises a protruding corrugated membrane sheet with corrugations protruding upwardly, applied to a flat portion of the liquefied gas storage tank; a corner plate having a folded portion applied to a corner portion of the liquefied gas storage tank; and a corner corrugated connecting member having a folded portion applied to a corner portion of the liquefied gas storage tank. Here, in the protruding corrugated membrane sheet, the corrugations are formed in a grid shape having horizontal corrugations, vertical corrugations, and corrugation intersections. The membrane sheet, corner plate, and corner corrugated connecting member can be formed from metal materials such as Invar or stainless steel. The primary barrier of the liquefied gas storage tank is formed by connecting protruding corrugated membrane sheets in a flat section by overlapping welding using a welding device, connecting a corner plate to a protruding corrugated membrane sheet in a flat section by overlapping welding in a corner section, and connecting a corner corrugated connecting member to a protruding corrugated membrane sheet and a corner plate by overlapping welding in a corner section. Welding devices can be broadly classified into flat welding devices applied to flat parts and corner welding devices applied to corner parts. A welding device for a flat surface or a welding device for a corner may include a welding section configured to control various axes, such as a travel axis (X-axis) that moves along a travel rail, a height axis (Y-axis) that controls the height of the welding head by adjusting the height of the protruding corrugated membrane sheet or simultaneously adjusting the height of the welding head and the welding torch to control the arc length, a rotation axis (R-axis) that controls the rotation angle of the welding head and the welding torch, a width axis (Z-axis) that controls the position of the welding torch in the width direction of the welding line, a weaving axis (W-axis) that detects a step difference by weaving a laser displacement sensor to detect the welding line, and a height axis (AC-axis) that controls the arc length of the welding torch. In addition, a flat welding device or a corner welding device may include a clamping unit fixed to a corrugated intersection to guide the movement of the weld, and a traveling rail installed on the clamping unit to form a movement path of the weld. The clamping unit includes a gripping part consisting of a fixed block and a movable block so as to grip both sides of the corrugated intersection of the primary barrier. Excellent welding quality can be obtained by stably fixing the welding device to the corrugated intersection during welding operations; to this end, research is underway to improve the fixing force of the gripping part that holds both sides of the corrugated intersection. FIG. 1 is a schematic diagram of a welding device for a flat surface or a corner according to one embodiment of the present invention. FIG. 2 is a perspective view of a barrier membrane sheet to be welded by a welding device according to one embodiment of the present invention. Figure 3 is a plan view of the clamping unit illustrated in Figure 1. Fig. 4 is a front view of the clamping unit illustrated in Fig. 1. FIG. 5 is a drawing for explaining the guide pin of the clamping unit according to the present invention. FIG. 6 is a drawing showing the open state of the clamping unit according to the present invention. FIG. 7 is a drawing illustrating the closed state of the clamping unit according to the present invention. The purpose, specific advantages, and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments in conjunction with the accompanying drawings. It should be noted that in assigning reference numerals to the components of each drawing in this specification, identical components are assigned the same number whenever possible, even if they are shown in different drawings. Furthermore, in describing the present invention, detailed descriptions of related prior art are omitted if it is determined that such detailed descriptions would unnecessarily obscure the essence of the present invention. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. FIG. 1 is a schematic diagram of a welding device for a flat surface or a corner according to one embodiment of the present invention, FIG. 2 is a perspective view of a barrier membrane sheet to be welded by a welding device according to one embodiment of the present