A steel bar butt welding connection structure

Abstract

The present invention provides a steel bar butt welding connection structure, comprising a connected steel bar with a flat end, a connecting member and a butt weld, wherein the flat end is integrated with the connected steel bar, and the connected steel bar and the connecting member are connected together by welding the flat end and the connecting member with a butt weld. The present invention proposes a steel bar butt welding connection scheme to solve the problems of insufficient space, low connection strength and inconvenient operation of the steel bar butt connection between the existing prefabricated structure and other components. The technical scheme can complete the welding of steel bars while ensuring the connection strength in a small connection space. The scheme is compact in structure, safe and reliable, easy to install and economical, and can be widely used in construction projects, with great value.

Description

Technical Field

[0001] This patent belongs to the field of construction engineering, and in particular relates to a connection structure of steel bars. Background Art

[0002] Prefabricated buildings meet the requirements of building industrialization and green environmental protection, especially my country's industrial policies on green buildings and building industrialization, and the demand for prefabricated buildings is increasing. The steel bar connection between prefabricated components is one of the important contents of prefabricated buildings. In engineering applications, it is necessary to connect the steel bars of beams, columns, walls and other components, and between steel bars and embedded steel plates on site.

[0003] At present, the connection methods between steel bars include nut sleeve butt connection ( Figure 1 ), electroslag pressure welding, strip welding, lap welding ( Figure 2 ) etc. There is a T-shaped welding between the steel bar and the steel plate ( Figure 3 ) or side lap welding ( Figure 4 ). The implementation of these steel bars requires a relatively large connection size (especially along the connection length direction), and T-type welding is often impossible to operate. At the same time, it is also impossible to meet the requirement that the strength of the connection node is not less than the strength of the connected steel bars. This brings difficulties in the application of prefabricated components in assembled buildings. A better solution for connecting in a relatively small space is to use butt welding, and it is ideal to complete the welding on one side at one time. However, since the cross-section of the steel bar is circular, it is impossible to achieve welding with equal strength on one side. Therefore, it is very meaningful to invent a steel bar connection method with a simple connection structure, easy operation and high strength. Summary of the invention

[0004] The technical problem to be solved by the present invention is to propose a steel bar butt welding connection scheme to solve the problems of insufficient space, low connection strength and inconvenient operation of steel bar butt connection between existing prefabricated structures and other components.

[0005] In this technical solution, the steel bar connection end is converted into a flat end, thereby adopting a butt connection scheme that is the same as the steel plate butt welding method.

[0006] The present invention is achieved through the following technical solutions:

[0007] A butt welding connection of steel bars comprises a connected steel bar with a flat end, a connecting member and a butt weld, wherein the flat end and the connected steel bar are integral, and the connected steel bar and the connecting member are connected together by welding the flat end and the connecting member with a butt weld. The upper and lower surfaces of the flat end are planes.

[0008] As a preferred solution, the flat end is made by flattening one end of the connected steel bar or flattening after roughing. Flattening after roughing can obtain a larger welding section. The purpose of flattening is to obtain the welding length size of the butt weld. In particular, after roughing, flattening, the cross-sectional size of the weld can be made larger as needed, so as to achieve a stronger connection strength and ensure that the connection strength is greater than the strength of the connected steel bar. The steel bar flattening solution is suitable for industrial large-scale processing.

[0009] As a preferred solution, the flat end is a steel plate welded to one end of the connected steel bar. This structure is suitable for small-scale applications.

[0010] As a preferred solution, the connecting member is the connected steel bar with a flat end. This situation belongs to butt connection of two steel bars, such as connecting steel bars at the same position of two upper and lower columns, upper and lower wall panels, two sections of beams, etc.

[0011] As a preferred solution, the connecting member is a steel plate. The connection between the steel bar and the steel plate can be butt welding in the thickness direction of the steel bar and the steel plate, or a T-shaped connection between the steel bar and the steel plate.

[0012] Beneficial effects of the invention: The connection of steel bars between prefabricated components is one of the main contents of prefabricated assembled buildings. The invention provides an effective technical solution for solving the problem of equal-strength butt welding of steel bars between prefabricated components or between steel bars and steel plates in engineering. The technical solution can complete the welding of steel bars while ensuring the connection strength in a small connection space. The solution is compact in structure, safe and reliable, easy to install, and economical. It can be widely used in construction projects and has great value. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the nut sleeve butt connection between steel bars;

[0014] Figure 2 This is a schematic diagram of lap welding between steel bars;

[0015] Figure 3 This is a schematic diagram of welding between steel bars;

[0016] Figure 4 This is a schematic diagram of T-shaped welding between steel bars and steel plates;

[0017] Figure 5 It is a schematic diagram of the side lap welding butt joint between the steel bar and the steel plate;

[0018] Figure 6 Schematic diagram of connected steel bars with flat ends;

[0019] Figure 7 for Figure 6 A top view of

[0020] Figure 8 It is a schematic diagram of the connected steel bars at the flat end of the pier strip;

[0021] Fig. 9 for Figure 8 A top view of

[0022] Fig.10 The figure is a schematic diagram of the connected steel bars at the flat end of the steel plate;

[0023] Fig.11 for Fig.10 A top view of

[0024] Fig.12 This is a schematic diagram of the steel bar and steel bar connection structure of Example 1.

[0025] Fig.13 for Fig.12 A top view of

[0026] Fig.14 This is a schematic diagram of the butt connection structure between the steel bar and the steel plate in Example 2;

[0027] Fig.15 for Fig.14 A top view of

[0028] Fig.16 This is a schematic diagram of the T-shaped butt connection structure between the steel bar and the steel plate in Example 3;

[0029] Fig.17 for Fig.16 Top view of the . DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with the embodiments.

[0031] Embodiment 1

[0032] like Figures 6 to 13A steel bar butt welding connection shown in the figure comprises a connected steel bar 1 with a flat end 2, a connecting member 3 and a butt weld 4. The flat end 2 of the connected steel bar is obtained by flattening or welding a steel plate after flattening or roughening one end of the steel bar. The connected steel bar 1 and the connecting member 3 are connected together by welding the flat end 2 and the connecting member 3 with a butt weld 4, which increases the contact area of ​​the connection, thereby improving the welding firmness and achieving the purpose of ensuring the welding firmness in a small space. The connecting member 3 in this embodiment is a connected steel bar 1 with a flat end 2, that is, two steel bars are directly welded. In this embodiment, the width of the flat end is greater than the diameter of the connected steel bar, so that it has a larger welding contact surface. In this embodiment, the butt weld is an inclined surface processed at the flat end, so that a gap is formed after the flat end and the connecting member contact. By welding at the weld position, the welding contact surface is further increased, so that the welding firmness can be ensured by only single-sided welding, and the welding is more convenient and quick.

[0033] Embodiment 2

[0034] like Fig.14 and Fig.15 As shown, the difference between this embodiment and the first embodiment is that the connecting member 3 in this embodiment is a flat steel plate. In this embodiment, the flat end of the connected steel bar is connected to one side end of the steel plate in a vertical state. A butt weld is also provided at the end of the flat end. By welding at the butt weld position, the welding firmness between the two is ensured. In this embodiment, in order to make the connection between the two more firmly, the thickness of the steel plate should be greater than or equal to the thickness of the flat end.

[0035] Embodiment 3

[0036] like Fig.16 and Fig.17 As shown, the difference between this embodiment and the first embodiment is that the connecting member 3 in this embodiment is a vertically placed steel plate, and the flat end of the connected steel bar in this embodiment is connected to the side surface of the steel plate, and the two are also in a vertical state. A butt weld is also set at the end of the flat end, and welding at the butt weld position ensures the welding firmness between the two.

Claims

1. A steel bar butt welding connection structure, comprising connected steel bars and a connecting member, characterized in that: The connected steel bars have flat ends, which are integral with the connected steel bars. A butt weld is provided on the end face of the flat end of the connecting steel bar. The butt weld is provided between the flat end and the connecting member to weld the connected steel bars and the connecting member together at the weld. The upper and lower surfaces of the flat end along the length direction of the weld are plane.

2. A steel bar butt welding connection structure according to claim 1, characterized in that: The flat end is made by flattening one end of the connected steel bar or by flattening it after being thickened.

3. A steel bar butt welding connection structure according to claim 1, characterized in that: The flat end is a steel plate welded to one end of the connected steel bar.

4. A steel bar butt welding connection structure according to claim 1, characterized in that: The connecting member is a connected steel bar with a flat end.

5. A steel bar butt welding connection structure according to claim 1, characterized in that: The connecting member is a steel plate.

6. A steel bar butt welding connection structure according to claim 1, characterized in that: The butt weld is an inclined surface arranged on the end surface of the flat end, so that a gap is generated between a part of the flat end and the connecting member.

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