KR-20260067042-A - A welding jig for a large pipe

Abstract

The present invention relates to a welding jig for connecting large pipes by welding them together, and is a technology for a welding jig for large pipes that allows for quick and easy welding work even without a skilled worker, as the alignment of the pipes can be done simply by a single worker and welding defects are minimized, and the motor rotates the pipes slowly while the stopper prevents the pipes from shaking. The main configuration of the present invention is implemented by including: a base placed on the ground; a post installed on the upper part of the base, with rollers installed horizontally side by side; a transfer post installed on the upper part of the base, with rollers installed horizontally side by side; a support roller installed on the post to prevent the pipe from sliding; and a motor installed on the post to slowly rotate the pipe.

Inventors

• 조성훈

Assignees

• 주식회사 가온

Dates

Publication Date

20260512

Application Date

20241105

Claims (5)

1. A base (10) placed on the ground; a post (20) installed on the upper part of the base (10) and having rollers (22)(23) installed horizontally side by side; a transfer post (30) installed on the upper part of the base (10) and having rollers (32)(33) installed horizontally side by side; a support roller (40) installed on the post (20) to prevent the pipe (100) from sliding; and a motor (50) installed on the post (20) to slowly rotate the pipe (100); comprising The above base (10) has a rail (11) installed on one side of the upper portion, and the rail (11) is installed in an elongated manner in the left-right direction, while being installed side by side at a predetermined distance from the front and rear sides. A welding jig for a large pipe, characterized in that the above post (20) and transfer post (30) are installed as a pair at a predetermined distance apart on the front and rear sides, a horizontally elongated mounting bracket (21)(31) is formed on the upper part, and rollers (22)(23)(32)(33) are installed elongatedly on the mounting brackets (21)(31) on the front and rear sides so as to face each other.
2. In paragraph 1, The above transfer post (30) is, A welding jig for a large pipe, characterized in that it is installed vertically on the upper part of a transfer base (35), and transfer blocks (36) are installed on both sides of the lower part of the transfer base (35), and the transfer blocks (36) are installed so as to be movable left and right by engaging with a rail (11) placed on the upper part of the base (10).
3. In paragraph 2, A welding jig for a large pipe, characterized in that it is equipped with a stopper (60) that inhibits left and right movement of the transfer post (30), and the stopper (60) is installed on one side of the transfer base (35).
4. In paragraph 1, The above support roller (40) is, A welding jig for a large pipe, characterized by being installed on the upper part of a post (20), positioned below the middle part of rollers (22) (23) located on the front and rear sides, and installed horizontally parallel to said rollers (22) (23).
5. In paragraph 1, The above motor (50) is, A welding jig for a large pipe, characterized by being installed on the upper part of a post (20) located on the rear side and driving a rear side roller (23) to slowly rotate the pipe (100).

Description

A welding jig for a large pipe The present invention relates to a welding jig for connecting large pipes by welding them together. More specifically, it relates to a welding jig for large pipes in which multiple rollers are installed to support two pipes horizontally, thereby making pipe alignment work easy even for a single worker and minimizing welding defects, and in which a motor slowly rotates the pipes while a stopper prevents shaking of the pipes, so that welding work can be carried out quickly and easily even by a non-skilled worker. Generally, to install long, large pipes used in plant facilities, semiconductor equipment, and ships, it is necessary to weld two pipes together. When welding two pipes in this manner, alignment is required to adjust the height difference and spacing between them. Recently, in the case of butt welding connecting two pipes, pipe alignment must be performed prior to the welding process to ensure welding quality. However, in most cases, the two pipes are placed on a fixed support, and the welding is carried out while visually inspecting the pipe ends using a conventional jig. As such, when a worker performs welding while visually checking the alignment of the pipes using a conventional jig, welding defects occur due to uneven pipe alignment, and there are problems such as the welding process taking a long time and requiring a high level of worker skill. In this regard, Korean Registered Patent No. 10-2146341 (Clamping Jig for Pipe Welding) has been presented as a prior art that fixes the joint position of two existing pipes and allows for simple and rapid alignment of the pipes. This prior art is installed between two pipes joined by welding to hold the joint position in place during the welding process. Since it allows for simple and rapid alignment of the two pipes, it provides the effect of minimizing welding defects and reducing the time required for the welding operation. In addition, Korean Registered Patent No. 10-2202963 (Jig for Pipe Welding) has been presented as prior art for a jig that allows a single worker to easily align pipes and facilitates convenient work by exposing the welded area. This prior art not only reduces the weight of the jig itself but also provides a support means and a separation means to support heavy metal pipes on the jig, thereby enabling a single worker to align two pipes and, once the pipe alignment is complete, exposes the entire welded area, providing the effect of performing the welding work in one go. However, the "pipe welding jig" presented in the prior art has problems such as being somewhat difficult to accurately align the pipes for non-skilled workers, requiring a relatively long time for pipe alignment even for skilled workers, and threatening the safety of workers during installation and dismantling due to structural impact and heavy weight. In addition, even if welding is performed after chucking the pipe onto a rotator or jig, the pipe shakes slightly during the welding process, making precise work difficult and resulting in welding defects, while the welding process takes a long time. FIG. 1 is a perspective view showing an embodiment of the present invention. FIG. 2 is a perspective view showing the usage state of an embodiment in the present invention. FIG. 3 is a cross-sectional view showing the operating state of an embodiment in the present invention. FIG. 4 is a side cross-sectional view showing the operating state of an embodiment in the present invention. FIG. 5 is a side cross-sectional view of a key part showing the operating state of the support roller in the present invention. FIG. 6 is a side cross-sectional view of a key part showing the operating state of the motor in the present invention. FIG. 7 is a side cross-sectional view of a key part showing the installation state of the stopper in the present invention. FIG. 8 is a plan cross-sectional view of a key part showing the installation state of the stopper in the present invention. FIG. 9 is a plan cross-sectional view of a key part showing the operating state of the stopper in the present invention. FIG. 10 is a side cross-sectional view of a key part showing the operating state of the stopper in the present invention. Before explaining the technical concept of the present invention in more detail using the attached drawings, the terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings. Instead, based on the principle that the inventor can appropriately define the concepts of the terms to best describe his invention, they must be interpreted in a meaning and concept consistent with the technical concept of the present invention. Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are merely one preferred embodiment of the present invention and do not represent all of the technical concept of the present invention; th