Reinforcing structure for steel pipe connection

Abstract

The utility model discloses a reinforcing structure for steel pipe connection, the reinforcing structure comprises an inner lining plate and an annular channel steel plate, the inner lining plate is fixed on the inner side of a subsection interface of a steel pipe, two ends of the inner lining plate respectively extend into the inner sides of the subsection interfaces of two adjacent steel pipes and are fixed, and the annular channel steel plate is fixed on the inner sides of the subsection interfaces of the two adjacent steel pipes. The annular groove steel plate is fixed to the butt joint welding seam of every two adjacent sections of segmented steel pipes, the annular groove steel plate comprises an upper semicircular groove steel plate and a lower semicircular groove steel plate, and the upper semicircular groove steel plate and the lower semicircular groove steel plate are symmetrically fixed to the two sides of the butt joint welding seam of every two adjacent sections of segmented steel pipes. The inner lining plates are fixed on the inner sides of the two adjacent sections of segmented steel pipes, the inner plastic-coated layers at the weld joints of the two adjacent sections of segmented steel pipes can be prevented from being damaged, and the annular groove steel plates are fixed at the weld joints of the two adjacent sections of segmented steel pipes, so that the strength of the weld joints of the two adjacent sections of segmented steel pipes can be improved, and the weld joints of the segmented steel pipes can be reinforced.

Description

Technical Field

[0001] The utility model relates to the technical field of steel pipe construction, in particular to a reinforcement structure for connecting steel pipes. Background Art

[0002] Drainage steel pipes buried in weak foundations are connected by welding. The damage to the steel pipes is often manifested as cracking of the welds at the steel pipe joints, which leads to failure of the overall steel pipe structure. Therefore, in order to increase the strength of the steel pipe welds, the welds need to be reinforced. The traditional method of reinforcing steel pipe welds is usually to evenly distribute steel plates around the steel pipe welds. During installation, the surface of the steel pipe connection welds is first smoothed, then the connection plates are installed, and finally the connection plates are welded around. The existing steel plate reinforcement method for steel pipes has the following shortcomings:

[0003] 1) The weld needs to be ground flat first, which will damage the original weld to a certain extent and is labor-intensive;

[0004] 2) The steel plate is flat, while the surface of the steel pipe is curved. The steel plate and the steel pipe surface are not closely fitted together, and there is a large gap between them.

[0005] 3) The steel plate is welded around the steel plate, forming a cross weld with the original installation weld, resulting in a large welding stress concentration. Utility Model Content

[0006] In view of the technical problems existing in the existing pipeline and flange welding construction process, the technical problem to be solved by the present invention is to provide a reinforcement structure for steel pipe installation, which solves the problems existing in the steel plate reinforcement structure, and can reinforce the steel pipe without destroying the original installation weld structure, thereby avoiding the generation of large stress concentration.

[0007] In order to solve the problems of the existing technology, the utility model provides a reinforcement structure for connecting steel pipes, wherein the steel pipe is composed of a plurality of segmented steel pipes, and two adjacent segmented steel pipes are connected to each other. The reinforcement structure includes an inner lining plate and an annular groove steel plate. The inner lining plate is fixed to the inner side of the segmented interface of the steel pipe. The two ends of the inner lining plate are respectively extended into the inner side of the segmented interface of the two adjacent segmented steel pipes and fixed. Then, the annular groove steel plate is fixed to the weld where the two adjacent segmented steel pipes are connected. The annular groove steel plate includes an upper semicircular groove steel plate and a lower semicircular groove steel plate. The upper semicircular groove steel plate and the lower semicircular groove steel plate are symmetrically fixed on both sides of the weld where the two adjacent segmented steel pipes are connected.

[0008] Furthermore, the upper semicircular groove steel plate is fixed to the upper half of the weld surface of two adjacent segmented steel pipes, and the lower semicircular groove steel plate is fixed to the lower half of the weld surface of two adjacent segmented steel pipes.

[0009] Furthermore, upper flanges are fixed on both sides of the upper semicircular groove steel plate, and the upper semicircular groove steel plate is fixed to the upper half of the weld surface of two adjacent segmented steel pipes through the upper flanges on both sides.

[0010] Furthermore, the inner diameter of the upper semicircular groove steel plate matches the outer diameters of two adjacent segmented steel pipes.

[0011] Furthermore, lower flanges are fixed on both sides of the lower semicircular groove steel plate, and the lower semicircular groove steel plate is fixed to the side walls of the lower halves of two adjacent segmented steel pipes through the lower flanges on both sides.

[0012] Furthermore, the inner diameter of the lower semicircular groove steel plate matches the outer diameters of two adjacent segmented steel pipes.

[0013] Furthermore, the annular channel steel plate is processed and bent into a ring shape by channel steel.

[0014] Furthermore, the inner lining plate is a stainless steel inner lining plate, and the thickness of the inner lining plate is 6 mm.

[0015] Compared with the prior art, the solution of the present invention has at least the following beneficial effects:

[0016] The reinforcement structure of the present invention includes an inner lining plate and an annular groove steel plate. The inner lining plate is fixed to the inner side of the segmented interface of the steel pipe. After the two ends of the inner lining plate are respectively extended into the inner side of the segmented interface of the adjacent two segmented steel pipes and fixed, the annular groove steel plate is fixed to the weld where the adjacent two segmented steel pipes are butted together. The annular groove steel plate includes an upper semicircular groove steel plate and a lower semicircular groove steel plate. The upper semicircular groove steel plate and the lower semicircular groove steel plate are symmetrically fixed to both sides of the weld where the adjacent two segmented steel pipes are butted together. The present invention fixes an inner lining plate to the inner side of the adjacent two segmented steel pipes to prevent the inner plastic coating layer at the weld where the adjacent two segmented steel pipes are butted together. The annular groove steel plate is fixed to the weld where the adjacent two segmented steel pipes are butted together to improve the strength of the installation weld between the adjacent two segmented steel pipes and reinforce the weld of the segmented steel pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings of the embodiments are briefly introduced below.

[0018] Figure 1 This is a schematic elevation diagram of the reinforcement structure and steel pipe of the utility model;

[0019] Figure 2 This is a schematic cross-sectional elevation diagram of the utility model of an annular groove steel plate welded to a steel pipe weld;

[0020] Figure 3 This is a partial enlarged schematic diagram of the upper semicircular groove steel plate welded to the weld of the steel pipe in the utility model;

[0021] Figure 4 This is a partial enlarged schematic diagram of the weld seam of the lower semicircular groove steel plate welded to the steel pipe of the utility model;

[0022] Figure 5 This is a schematic elevational cutaway view of the upper semicircular groove steel plate of the present invention;

[0023] Figure 6 This is a schematic elevational cutaway view of the lower semicircular groove steel plate of the present invention;

[0024] Figure 7 It is a partially enlarged schematic diagram of the horse plate and the inclined iron adjusting ring groove steel plate of the utility model.

[0025] In the figure: segmented steel pipe 1, reinforcement structure 2, annular groove steel plate 21, upper semicircular groove steel plate 211, upper flange 2111, lower semicircular groove steel plate 212, lower flange 2121, inner lining plate 22, horse plate 3, inclined iron 4. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] like Figure 1-6As shown, the first embodiment of the present invention provides a reinforcement structure 2 for connecting steel pipes. The steel pipe is composed of a plurality of segmented steel pipes 1. Two adjacent segmented steel pipes 1 are connected to each other. The reinforcement structure 2 includes an inner lining plate 22 and an annular groove steel plate 21. The inner lining plate 22 is fixed to the inner side of the segmented interface of the steel pipe. The two ends of the inner lining plate 22 are respectively extended into the inner side of the segmented interface of the adjacent two segmented steel pipes and fixed. The annular groove steel plate 21 is fixed to the weld where the two adjacent segmented steel pipes 1 are connected. The annular groove steel plate 21 includes an upper semicircular groove steel plate 211 and a lower semicircular groove steel plate 212. The upper semicircular groove steel plate 211 and the lower semicircular groove steel plate 212 are symmetrically fixed on both sides of the weld where the two adjacent segmented steel pipes 1 are connected. In specific implementation, the inner lining plate 22 of the present invention is a stainless steel inner lining plate 22 with a thickness of 6 mm. By setting the inner lining plate 22, the inner plastic coating layer at the weld of the steel pipe will not be damaged. The annular groove steel plate 21 of the present invention is arranged along the axial direction of the steel pipe. The steel pipe of the present invention is manufactured in sections in a processing plant. The inner lining plate 22 is fixed to the inner side of the segmented interface of the two adjacent segmented steel pipes 1 by welding. The inner lining plate 22 is welded to the inner side of the segmented interface by a stainless steel welding rod. Finally, the weld between the two adjacent segmented steel pipes 1 is welded. After the welding is completed, the installation position control line of the annular groove steel plate 21 is marked with the center of the weld as the center. The lower semicircular groove steel plate 212 is installed first, and then the upper semicircular groove steel plate 211 is installed.

[0028] When the embodiment of the present invention is specifically implemented, the upper semicircular groove steel plate 211 is fixed to the upper half of the weld surface of the two adjacent segmented steel pipes 1, and the lower semicircular groove steel plate 212 is fixed to the lower half of the weld surface of the two adjacent segmented steel pipes 1. Upper flanges 2111 are fixed on both sides of the upper semicircular groove steel plate 211. The upper semicircular groove steel plate 211 is fixed to the upper half of the weld surface of the two adjacent segmented steel pipes 1 through the upper flanges 2111 on both sides. The inner diameter of the upper semicircular groove steel plate 211 matches the outer diameter of the two adjacent segmented steel pipes 1.

[0029] The utility model has lower flanges 2121 fixed on both sides of the lower semicircular groove steel plate 212. The lower semicircular groove steel plate 212 is fixed to the side walls of the lower halves of the two adjacent segmented steel pipes 1 through the lower flanges 2121 on both sides. The inner diameter of the lower semicircular groove steel plate 212 matches the outer diameter of the two adjacent segmented steel pipes 1.

[0030] In specific implementation, the upper semicircular groove steel plate 211 of the present invention is fixed to the upper half of the weld surface of two adjacent segmented steel pipes 1 by welding, and the lower semicircular groove steel plate 212 is fixed to the lower half of the weld surface of two adjacent segmented steel pipes 1 by welding.

[0031] The annular channel steel plate 21 of the present invention is a channel steel 16a, with a size of 160×63×6.5 mm. The annular channel steel plate 21 is processed and bent into a ring shape by the channel steel, and the inner arc diameter of the annular channel steel plate 21 is ф820-ф825 mm.

[0032] like Figure 7 As shown, the reinforcement structure 2 of the present invention is used for connecting steel pipes, and the specific installation process is as follows:

[0033] The buried drainage steel pipe of a certain project is a plastic-coated steel pipe ф820×15, installed on the alluvial plain;

[0034] To ensure that the inner plastic coating layer at the steel pipe weld is not damaged, it is necessary to fix the reinforcement structure 2 at the steel pipe. An inner lining plate 22 is set in the weld area of ​​the steel pipe. The inner lining plate 22 is 304 stainless steel with a thickness of 6 mm.

[0035] The steel pipes are manufactured in sections at the processing plant. The inner lining plates 22 are welded to the inner side of the section interfaces of two adjacent section steel pipes 1. At the construction site, the steel pipes are first aligned, then the welds between the inner lining plates 22 are welded, and finally the welds between the two adjacent section steel pipes 1 are welded. After welding is completed, the installation position control line of the annular groove steel plate 21 is marked with the center of the weld as the center. The lower semicircular groove steel plate 212 is installed first, and then the upper semicircular groove steel plate 211 is installed.

[0036] Check the fitting of lower semicircular groove steel plate 212 and steel pipe surface and the fitting of upper semicircular groove steel plate 211 and steel pipe surface with feeler gauge. When the gap exceeds 1mm, set horse plate 3 at the larger gap. First, weld horse plate 3 and steel pipe surface, then knock and extrude channel steel with oblique iron 4, so that the fitting of channel steel inner camber surface and steel pipe surface is tight and seamless. Spot welding of annular groove steel plate 21 is fixed to steel pipe surface. When the gap of annular groove steel plate 21 and steel pipe surface is 1mm in all positions, first weld upper semicircular groove steel plate 211 and lower semicircular groove steel plate 212, finally weld the weld seam of lower semicircular groove steel plate 212 and steel pipe surface and the weld seam of upper semicircular groove steel plate 211 and steel pipe surface. When the bending radian of upper and lower semicircular groove steel plates 212 is inconsistent with the deviation position of steel pipe, upper and lower semicircular groove steel plates 212 and steel pipe can be fitted tightly by horse plate 3.

[0037] Compared with the prior art, the technical solution disclosed in the above embodiment has the following beneficial effects:

[0038] In the above embodiment, the reinforcement structure 2 of the present invention can prevent the inner plastic coating layer at the weld of the two adjacent segmented steel pipes 1 from being damaged by fixing an inner lining plate 22 on the inner side of the two adjacent segmented steel pipes 1. The weld where the two adjacent segmented steel pipes 1 are butt-jointed is fixed with an annular groove steel plate 21, which can improve the strength of the installation weld of the two adjacent segmented steel pipes 1, reinforce the weld of the segmented steel pipe 1, and avoid the brittleness of the weld from being damaged. In addition, the annular groove steel plate 21 of the present invention is configured as upper and lower semicircular groove steel plates 212, which facilitates the installation of the upper and lower semicircular groove steel plates 212 and the steel pipes. The annular groove steel plate 21 is fixed to the outer side of the inner lining plate 22 through the two adjacent segmented steel pipes 1.

[0039] The above disclosure is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A reinforcement structure for connecting steel pipes, characterized in that: The steel pipe is composed of several segmented steel pipes, and two adjacent segmented steel pipes are connected to each other. The reinforcement structure includes an inner lining plate and an annular groove steel plate. The inner lining plate is fixed to the inner side of the segmented interface of the steel pipe. The two ends of the inner lining plate are respectively extended into the inner side of the segmented interface of the two adjacent segmented steel pipes and fixed. Then, the annular groove steel plate is fixed to the weld where the two adjacent segmented steel pipes are connected. The annular groove steel plate includes an upper semicircular groove steel plate and a lower semicircular groove steel plate. The upper semicircular groove steel plate and the lower semicircular groove steel plate are symmetrically fixed on both sides of the weld where the two adjacent segmented steel pipes are connected.

2. The reinforcement structure for connecting steel pipes according to claim 1, characterized in that: The upper semicircular groove steel plate is fixed to the upper half of the weld surface of two adjacent segmented steel pipes, and the lower semicircular groove steel plate is fixed to the lower half of the weld surface of two adjacent segmented steel pipes.

3. The reinforcement structure for connecting steel pipes according to claim 2, characterized in that: Upper flanges are fixed on both sides of the upper semicircular groove steel plate, and the upper semicircular groove steel plate is fixed to the upper half of the weld surface of two adjacent segmented steel pipes through the upper flanges on both sides.

4. The reinforcement structure for connecting steel pipes according to claim 3, characterized in that: The inner diameter of the upper semicircular groove steel plate matches the outer diameters of two adjacent segmented steel pipes.

5. The reinforcement structure for connecting steel pipes according to claim 2, characterized in that: Lower flanges are fixed on both sides of the lower semicircular groove steel plate, and the lower semicircular groove steel plate is fixed to the side walls of the lower halves of two adjacent segmented steel pipes through the lower flanges on both sides.

6. The reinforcement structure for connecting steel pipes according to claim 5, characterized in that: The inner diameter of the lower semicircular groove steel plate matches the outer diameters of two adjacent segmented steel pipes.

7. The reinforcement structure for connecting steel pipes according to claim 1, characterized in that: The annular channel steel plate is processed and bent into an annular shape by channel steel.

8. The reinforcement structure for connecting steel pipes according to claim 4, characterized in that: The inner lining plate is a stainless steel inner lining plate, and the thickness of the inner lining plate is 6 mm.

Images