CN-116480021-B - Rigid connecting piece and cavity combination unit thereof

Abstract

The invention relates to a rigid connecting piece for a structure, in particular to a rigid connecting piece and a cavity combination unit thereof, which comprises a hollow pipe (1), wherein the hollow pipe (1) comprises a pipe body section (11), one end or two ends of the pipe body section (11) are provided with connecting sections (2), and the pipe wall thickness of the connecting sections (2) is larger than the thickness t of the pipe body section (11). The rigid connecting piece for structural connection can be used for direct rotary friction welding with a single steel plate or simultaneous friction welding with an upper double steel plate and a lower double steel plate, and has the advantages of simple manufacturing and construction, high connecting strength of the manufactured cavity combined unit and the like.

Inventors

• SUN TIANMING
• JIN XIANG

Assignees

• 浙江中隧桥波形钢腹板有限公司

Dates

Publication Date

20260505

Application Date

20230427

Claims (7)

1. 1. A rigid connecting piece comprises a hollow pipe (1) and is characterized in that the hollow pipe (1) comprises a pipe body section (11), one end or two ends of the pipe body section (11) are provided with a connecting section (2), the pipe wall thickness of the connecting section (2) is larger than the thickness T of the pipe body section (11), the connecting section (2) comprises a thickening ring (21) connected with the pipe body section (11), the thickening ring (21) is connected with an embedding section (22), the end face of the embedding section (22) is a connecting end face (23), the pipe wall thickness of the embedding section (22) is N, the pipe wall thickness N of the embedding section (22) is unchanged or gradually reduced from the pipe body section (11) to the connecting end face (23), and the wall thickness T of the thickening ring (21) gradually reduces from the connecting end face (23) to the pipe body section (11).
2. 2. A rigid connection according to claim 1, wherein the connection section (2) comprises a turned-up section (24) formed by everting the wall of the pipe section (11).
3. 3. A rigid connection according to claim 2, characterized in that the flanging section (24) is bent to form the reinforcing section (25).
4. 4. A rigid connection according to claim 1, wherein the hollow tube (1) is made of one or more of steel, aluminum alloy or titanium alloy.
5. 5. A rigid connection according to claim 1, wherein the diameter of the tangent circle of adjacent hollow tubes (1) is between 0.3 and 1.3 times the outer diameter of the hollow tubes (1).
6. 6. A cavity combination unit comprising a rigid connection according to claim 1, characterized in that it comprises at least one panel (4), the connection section (2) of the hollow tube (1) being welded to the panel (4) by rotational friction.
7. 7. A cavity combination unit according to claim 6, further comprising a top plate (5), wherein the hollow tube (1) is disposed between the top plate (5) and the panel (4), and wherein the hollow tube (1) is welded to the panel (4) and the top plate (5) by friction welding.

Description

Rigid connecting piece and cavity combination unit thereof Technical Field The present invention relates to a rigid connector for a structure, and more particularly, to a rigid connector and a cavity assembly unit thereof. Background The existing rigid connecting pieces used for single steel plates and double steel plates are mostly welded, clamped or joggled. The common welding has higher requirements on the distance between the double steel plates, if the distance between the double steel plates is too small, the welding workpiece or a person cannot enter the welding, but the common clamping or joggling has particularly high requirements on the butt joint and connection between the double steel plates, and the connection stability is poor. Disclosure of Invention Aiming at the problems that most of connecting pieces between single steel plates or double steel plates in the prior art are rods or connecting blocks, sectional clamping connection or joggling connection is adopted, the butt joint process and the process are complex, time and labor are wasted, and the invention provides a rigid connecting piece and a cavity combination unit thereof, wherein the rigid connecting piece can be used for directly rotating and friction welding with the single steel plate or simultaneously friction welding with an upper steel plate and a lower steel plate. In order to solve the technical problems, the invention is solved by the following technical scheme: A rigid connecting piece comprises a hollow pipe, wherein the hollow pipe comprises a pipe body section, one end or two ends of the pipe body section are provided with connecting sections, and the pipe wall thickness of each connecting section is larger than the thickness t of the pipe body section. The pipe wall thickness of the pipe body section is t, and the pipe wall thickness of the connecting section is increased firstly and then reduced or kept unchanged from the pipe body section to the connecting section. The end structure of this patent makes hollow tube and face roof form rigid connection body through the connection, through the parallel limit of inside and outside wall and shrink limit embedding face roof, make the shrinkage stress of its junction reduce, increase the compressive stress of junction, because the welding fatigue fracture mainly by tensile stress initiation, so the connection rigidity and the shearing capacity of this patent are general connection promotion, the production of first buckling half-wave is the earliest most sensitive stage when shearing or bearing of pipe casing, the rigidity of junction increases, compressive stress increases, tensile stress reduces, can postpone the emergence of hollow tube Guan Keti first buckling half-wave, thereby improve the ultimate bearing capacity and the shearing capacity of pipe casing. Preferably, the cross section of the hollow tube is regular hexagon or regular dodecagon. The pipe section has higher bearing capacity under thinner wall thickness, but the pipe section is more sensitive to defects, and is easy to form under bifurcation buckling and sudden buckling caused by the defects. This patent provides a middle section regular polygon when preparing high accuracy circular tube body section, and both ends are circular tube body section still, regular polygon is more than regular hexagon, actual optimization be 12, 16 limit. The pipe wall shape of the surface and the angle is formed by rolling the regular polygon in the middle section, the pipe wall shape is insensitive to initial defects, the buckling-resistant edges are formed by rolling each angle, the bearing capacity is further improved, and the cold working resistance of the metal is improved by rolling. Preferably, the connecting section comprises a thickening ring connected with the pipe body section, the thickening ring is connected with the embedded section, and the end face of the embedded section is a connecting end face. The thickness of the pipe wall of the thickening ring is T, and the thickness of the pipe wall of the embedded section is N. The end of the connecting section is provided with a thickening ring and an embedding section, a mechanical jogged shearing-resistant structure is formed when the embedding section is welded with the panel or the top plate, a welded body and mechanical jogged joint shearing-resistant structure is formed, the sensitivity of a welding defect of a connecting point can be weakened, the double thickening rings of the panel or the top plate increase the transition area of the thickness of the pipe section and the panel or the top plate, a constraint effect is formed on a first buckling half-wave when the pipe section bears, the 'foot-like' effect of the general pipe section when the pipe section yields is avoided, the occurrence of the first buckling half-wave is delayed, the bearing capacity is increased, and the occurrence probability of sudden buckling of the pipe section is weakened. Preferably, t