Ladder special for butt welding of large pipelines

Abstract

The utility model discloses a special ladder for butt welding of a large pipeline, which comprises a support plate, a support leg frame and a bottom plate, insertion frames are inserted at two ends of the support plate, arc-shaped bumps are arranged at the end parts of the insertion frames, first guide wheels are arranged on the outer walls of the arc-shaped bumps, the bottom of the support plate is connected with the support leg frame through bolts, and the support leg frame is connected with the bottom plate through bolts. Bottom plates are fixedly connected to the bottoms of the supporting leg frames, and the bottom plates are distributed in an arc shape. The arc-shaped bottom plate is arranged at the bottom of the supporting leg frame, the contact face between the bottom plate and a pipeline is enlarged, the stability of the scaffold is guaranteed, the idler wheels are arranged on the side faces of the supporting leg frame, the first guide wheels are arranged on the outer walls of the arc-shaped protruding blocks, the supporting plate and the supporting leg frame can be transported separately, time and labor are saved, and the construction efficiency is improved. And the burden of workers is relieved, and popularization is easy.

Description

Technical Field

[0001] The utility model relates to a pipeline internal construction frame, in particular to a special ladder for large-scale pipeline butt welding, belonging to the technical field of pipeline welding. Background Art

[0002] At present, when performing internal welding construction on the pipeline joints of large thermal power generating units, since the inner wall at a high place is difficult to contact, the workers will move the construction frame to the inside of the pipeline to perform welding construction on the pipe wall. Since the bottom of the pipeline is an arc structure, the stability of the traditional construction frame cannot be guaranteed when it is placed inside the pipeline, which causes certain safety hazards to the construction and is not conducive to the smooth progress of the welding work. In addition, during the transportation process, the construction frame requires the cooperation of multiple workers to lift it, which is time-consuming, labor-intensive and inefficient. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a special ladder for large-scale pipeline butt welding, which ensures the stability of the construction frame and facilitates the workers to move the construction frame, and is easy to use and simple to operate.

[0004] The technical solution adopted by the utility model to solve the technical problem is:

[0005] A special ladder for butt welding of large pipelines comprises a support plate, a leg frame and a bottom plate, wherein the two ends of the support plate are provided with a plug-in frame, the ends of the plug-in frame are provided with an arc-shaped protrusion, the outer wall of the arc-shaped protrusion is provided with a first guide wheel, the bottom of the support plate is connected to the leg frame by bolts, the bottom of the leg frame is fixedly connected to the bottom plate, and the bottom plate is distributed in an arc shape.

[0006] The bottom surface of the bottom plate is in close contact with the inner wall of the pipeline, and a second guide wheel is arranged in the middle of the front side surface of the bottom plate.

[0007] There are two leg frames distributed in a U shape, and a limiting groove is arranged at the position of the top of the leg frame corresponding to the bottom of the support plate. The top of the leg frame is inserted into the limiting groove and fixed by bolts.

[0008] The front side of the leg support is provided with rollers.

[0009] The inserting frame is fixedly connected with the supporting plate through bolts.

[0010] The curvature of the outer wall of the arc-shaped protrusion matches the curvature of the inner wall of the pipeline.

[0011] The positive beneficial effects of the utility model are:

[0012] 1. The utility model provides a bottom plate at the bottom of the leg frame, and the bottom plate is distributed in an arc shape and is closely attached to the inner wall of the pipeline, thereby increasing the contact surface between the bottom plate and the pipeline, ensuring the stability of the construction frame, and facilitating the smooth progress of the construction.

[0013] 2. The support plate and the leg frame of the utility model are detachable structures. After the outer wall of the ladder is used, it can be disassembled. By arranging rollers on the front side of the leg frame and arranging a second guide wheel on the front side of the base plate, it is convenient to move the leg frame and the base plate, saving time and effort and reducing the burden on the staff.

[0014] 3. The utility model provides a rack at both ends of the support plate, and an arc-shaped protrusion with a guide wheel at the end of the rack. After the ladder is used and disassembled, the length of the rack can be adjusted to make the arc-shaped protrusion close to the inner wall of the pipe, and the first guide wheel outside the arc-shaped protrusion can be used to move the support plate out of the pipe, so that the staff can quickly move the ladder. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the support plate of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the leg support frame of the utility model;

[0018] Among them: 1-support plate, 2-insertion frame, 3-arc-shaped protrusion, 4-first guide wheel, 5-limiting groove, 6-leg support, 7-bottom plate, 8-roller, 9-second guide wheel. DETAILED DESCRIPTION

[0019] The utility model is further explained and illustrated below in conjunction with the accompanying drawings:

[0020] For example, see Figure 1-Figure 3 A special ladder for large-scale pipeline butt welding comprises a support plate 1, a leg frame 6 and a bottom plate 7. A plug-in frame 2 is inserted at both ends of the support plate 1, an arc-shaped protrusion 3 is arranged at the end of the plug-in frame 2, a first guide wheel 4 is arranged on the outer wall of the arc-shaped protrusion 3, a leg frame 6 is connected to the bottom of the support plate 1 by bolts, and a bottom plate 7 is fixedly connected to the bottom of the leg frame 6, and the bottom plate 7 is distributed in an arc shape.

[0021] The bottom surface of the bottom plate 7 is in close contact with the inner wall of the pipeline, and a second guide wheel 9 is arranged in the middle of the front side surface of the bottom plate 7 .

[0022] There are two leg frames 6, which are distributed in a U shape. A limiting groove 5 is set at the top of the leg frame 6 corresponding to the bottom of the support plate 1. The top of the leg frame 6 is inserted into the limiting groove 5 and fixed by bolts.

[0023] Rollers 8 are arranged on the front side of the leg support frame 6 .

[0024] The inserting frame 2 is fixedly connected to the supporting plate 1 by bolts.

[0025] The curvature of the outer wall of the arc-shaped projection 3 matches the curvature of the inner wall of the pipeline.

[0026] In the above description, the length of the support plate is smaller than the diameter of the pipe. By moving the bracket, the outer wall of the arc-shaped protrusion can be tightly attached to the inner wall of the pipe, so that the support plate is stuck in the middle of the pipe. The staff can use the first guide wheel outside the arc-shaped protrusion to move the support plate until the support plate moves to the outside of the pipe.

[0027] In the above description, the leg frame and the base plate are an integrated structure. When the ladder is used, the leg frame can be removed from the bottom of the support plate and laid down. The leg frame and the base plate can be moved by the rollers and the second guide wheels until the leg frame and the base plate move to the outside of the pipe.

[0028] In the above description, by arranging a second guide wheel on the front side of the base plate, friction damage to the base plate can be avoided during the transportation of the leg frame.

[0029] In the above description, the outer wall of the bottom plate is in close contact with the inner wall of the pipe.

[0030] When in use, personnel can move the support plate and the leg frame separately to the pipeline construction site and assemble them inside the pipeline. The leg frame and the support plate are inserted together through the limit groove and fixed with bolts. After the installation is completed, the staff can stand on the support plate to carry out welding construction. During welding construction, the frame is retracted inward, and the outer wall of the arc-shaped protrusion does not contact the inner wall of the pipeline.

[0031] The utility model increases the contact area between the bottom plate and the pipeline by arranging an arc-shaped bottom plate at the bottom of the outrigger frame, thereby ensuring the stability of the construction frame; and facilitates the separate transportation of the support plate and the outrigger frame by arranging rollers on the side of the outrigger frame and arranging a first guide wheel on the outer wall of the arc-shaped protrusion, thereby saving time and effort, reducing the burden on the staff, and being easy to promote.

Claims

1. A special ladder for large-scale pipe butt welding, comprising a support plate (1), a leg frame (6) and a bottom plate (7), characterized in that: Insertion racks (2) are inserted at both ends of the support plate (1), arc-shaped protrusions (3) are arranged at the ends of the insertion racks (2), and first guide wheels (4) are arranged on the outer walls of the arc-shaped protrusions (3). The bottom of the support plate (1) is connected to a leg frame (6) by bolts, and the bottom of the leg frame (6) is fixedly connected to a bottom plate (7), and the bottom plate (7) is distributed in an arc shape.

2. A special ladder for large-scale pipeline butt welding according to claim 1, characterized in that: The bottom surface of the bottom plate (7) is in close contact with the inner wall of the pipe, and a second guide wheel (9) is provided in the middle of the front side surface of the bottom plate (7).

3. A special ladder for large-scale pipeline butt welding according to claim 1, characterized in that: There are two leg supports (6) distributed in a U-shape, and a limiting groove (5) is provided at the top of the leg support (6) at a position corresponding to the bottom of the support plate (1), and the top of the leg support (6) is inserted into the limiting groove (5) and fixed by bolts.

4. A special ladder for large-scale pipeline butt welding according to claim 3, characterized in that: A roller (8) is provided on the front side of the leg support (6).

5. The special ladder for large-scale pipeline butt welding according to claim 1 is characterized by: The inserting frame (2) is fixedly connected to the supporting plate (1) by means of bolts.

6. The special ladder for large-scale pipeline butt welding according to claim 1 is characterized by: The curvature of the outer wall of the arc-shaped protrusion (3) matches the curvature of the inner wall of the pipeline.

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