Efficient connecting structure for building assembly construction reinforcing steel bars

Abstract

The utility model relates to an efficient connecting structure for building assembly construction reinforcing steel bars, and effectively solves the problems of high difficulty and low efficiency of end connection of assembly type building reinforcing steel bars. According to the technical scheme, the device comprises two first connecting pipes and a second connecting pipe, external threads are arranged on the outer walls of the first connecting pipes, the screwing directions of the external threads on the two first connecting pipes are opposite, a first internal thread matched with the external threads is arranged at each end of the inner wall of the second connecting pipe, and the screwing directions of the two first internal threads are opposite; an axial avoiding groove is formed in the side wall of the first connecting pipe, one end of the avoiding groove is an open end, the other end of the avoiding groove is a closed end, and the open end is communicated to one end face of the first connecting pipe; the steel bar connecting device greatly improves the steel bar connecting speed, obviously reduces the connecting difficulty, is simple and practical, and has higher axial limiting strength.

Description

A high-efficiency connection structure for steel bars in prefabricated building construction Technical Field

[0001] This utility model relates to the field of prefabricated building construction, specifically a high-efficiency steel reinforcement connection structure for prefabricated building construction. Background Technology

[0002] In prefabricated building construction, the reinforcing bars between precast components need to be connected end-to-end. Currently, welding is the main method used. However, in-situ welding has problems such as slow construction speed, high welding difficulty, and high skill requirements for workers, which affects construction efficiency. Therefore, the sleeve connection method has emerged.

[0003] The invention patent with application number CN200810040489.X connects the reinforcing bars by tapping the ends of the reinforcing bars and then connecting them with threaded sleeves.

[0004] The utility model patent with application number CN92215686.7 fixes the sleeve to the end of the steel bar by cold pressing, and then connects them by threads between the sleeves;

[0005] The utility model patent with application number CN201220225965.7 axially limits the sleeve by processing an enlarged part at the end of the steel bar, and then connects it by a threaded sleeve;

[0006] The above methods, which involve tapping and expanding the ends of the reinforcing bars, are all special treatments for the reinforcing bars. They have poor process convenience and low efficiency. In particular, the expansion treatment is more complicated. On the other hand, the cold pressing method has limited tensile strength and is prone to slippage. Summary of the Invention

[0007] This utility model provides an efficient connection structure for steel bars in prefabricated building construction, aiming to solve the problems of difficult and inefficient connection of steel bar ends in prefabricated buildings.

[0008] The technical solution includes two first connecting pipes and one second connecting pipe. The outer wall of the first connecting pipe is provided with external threads, and the external threads on the two first connecting pipes have opposite directions. Each end of the inner wall of the second connecting pipe is provided with a first internal thread that matches the external threads, and the two first internal threads have opposite directions. An axial clearance groove is opened on the side wall of the first connecting pipe. One end of the clearance groove is an open end, and the other end is a closed end. The open end is opened to one end face of the first connecting pipe.

[0009] The second connecting pipe has a radial through hole on its middle section sidewall.

[0010] The length of the second connecting pipe is greater than twice the length of the clearance groove.

[0011] It also includes a temporary limiting ring, the inner wall of which is provided with a second internal thread that is adapted to the external thread on the first connecting pipe.

[0012] When connecting steel bars, this invention only requires rotating the second connecting pipe, eliminating the need for welding, which greatly improves the connection speed and significantly reduces the connection difficulty. In addition, compared to connecting steel bars to the connecting pipe through processes such as tapping, expanding, and cold pressing, bending the end of a steel bar only takes 5 to 10 seconds. Bending steel bars is simpler, more practical, faster, and has higher axial limiting strength. Attached Figure Description

[0013] Figure 1 is a perspective view of this utility model.

[0014] Figure 2 is a perspective view of the present invention with partial cross-section.

[0015] Figure 3 is a three-dimensional view of the device equipped with a temporary limiting ring.

[0016] Figure 4 is a three-dimensional view of the first connecting pipe.

[0017] Figure 5 is a two-dimensional view of the first connecting pipe.

[0018] Figure 6 is a three-dimensional view of the second connecting pipe.

[0019] Figure 7 is a cross-sectional view of the second connecting pipe. Detailed Implementation

[0020] Referring to the accompanying drawings, this utility model includes two first connecting pipes 1 and one second connecting pipe 2. The outer wall of each first connecting pipe 1 is provided with an external thread 3, and the external threads 3 on the two first connecting pipes 1 rotate in opposite directions. Each end of the inner wall of the second connecting pipe 2 is provided with a first internal thread 4 adapted to the external thread 3, and the two first internal threads 4 rotate in opposite directions. The two first connecting pipes 1 can be screwed onto the two ends of the second connecting pipe 2 respectively. When the second connecting pipe 2 is rotated, the two first connecting pipes 1 can move simultaneously towards each other or simultaneously away from each other. An axial... The clearance groove 5 has an open end and a closed end. The open end extends to one end face of the first connecting pipe 1. The first connecting pipe 1 is fitted onto the end of the reinforcing bar with the open end of the clearance groove 5 facing outward. Then, the end of the reinforcing bar is bent, and the bent part of the reinforcing bar is located inside the clearance groove 5. The outer end of the first connecting pipe 1 extends a distance past the bending point of the reinforcing bar and connects to the second connecting pipe 2. The two ends of the second connecting pipe 2 are connected to the two first connecting pipes 1, thereby completing the connection of the two reinforcing bars. The axial limit is achieved by the bent part of the reinforcing bar, preventing the reinforcing bar from moving axially.

[0021] Rebar bending can be done before the precast component is poured, or it can be done on the precast component after it has solidified and before assembly, or it can be bent in place after the precast component is assembled and hoisted into position. A handheld hydraulic rebar bending machine can be used to bend the rebar. Since it is the most convenient and efficient method to bend the rebar in batches before it is inserted into the precast component, this method can be given priority.

[0022] The second connecting pipe 2 has a radial through hole 6 on its middle section side wall. When rotating the second connecting pipe 2, a pry bar can be inserted into the radial through hole 6 for rotation. In addition, when pouring concrete, concrete slurry enters the second connecting pipe 2 through the radial through hole 6 to fill the pipe and form a permanent connection, while improving the compressive strength of the connecting pipe.

[0023] The length of the second connecting pipe 2 is more than twice the length of the clearance groove 5. When connecting, it can ensure that the end of the second connecting pipe 2 abuts against the bent section of the reinforcing bar, thereby axially limiting the reinforcing bar.

[0024] Since the first connecting pipe 1 needs to be fitted onto the end of the reinforcing bar before bending it, if the reinforcing bar is bent in advance before the precast component is poured, the first connecting pipe 1 may slide along the reinforcing bar to the pouring section and be buried in the concrete when the precast component is poured. Therefore, this utility model also includes a temporary limiting ring 7. The inner wall of the temporary limiting ring 7 is provided with a second internal thread that matches the external thread 3 on the first connecting pipe 1. After the reinforcing bar is bent, the first connecting pipe 1 is slid to the end of the reinforcing bar so that the outer end of the first connecting pipe 1 extends out of the bending point of the reinforcing bar. Then, the temporary limiting ring 7 is screwed onto the outer end of the first connecting pipe 1 to fix the first connecting pipe 1 to the end of the reinforcing bar. Since the temporary limiting ring 7 is only used for temporary limiting of the first connecting pipe 1 and is not used as a load-bearing component, it can be made of PVC material.

[0025] When using this utility model for rebar connection, after the precast component is hoisted into place, if the ends of the rebar have been pre-bent, the temporary limiting ring 7 on the first connecting pipe 1 is removed directly. Then, the second connecting pipe 2 is placed between the two first connecting pipes 1, and the second connecting pipe 2 is rotated so that its two ends are connected to the two first connecting pipes 1 via threads. The second connecting pipe 2 is then screwed until its two ends abut against the bent section of the rebar, thus completing the rebar connection. If the rebar has not been pre-bent, the first connecting pipe 1 is sleeved on the rebar, and then a handheld hydraulic bending machine is used to bend the rebar before connecting it with the second connecting pipe 2.

[0026] This invention greatly improves the speed of rebar connection, significantly reduces the connection difficulty, is simple and practical, and has higher axial limiting strength.

Claims

1. A high-efficiency connection structure for steel reinforcement in prefabricated building construction, characterized in that, It includes two first connecting pipes (1) and one second connecting pipe (2). The outer wall of the first connecting pipe (1) is provided with an external thread (3). The external threads (3) on the two first connecting pipes (1) are rotated in opposite directions. Each end of the inner wall of the second connecting pipe (2) is provided with a first internal thread (4) that is adapted to the external thread (3). The two first internal threads (4) are rotated in opposite directions. An axial clearance groove (5) is opened on the side wall of the first connecting pipe (1). One end of the clearance groove (5) is an open end and the other end is a closed end. The open end is opened to one end face of the first connecting pipe (1).

2. The efficient steel reinforcement connection structure for prefabricated building construction according to claim 1, characterized in that, The second connecting pipe (2) has a radial through hole (6) on the side wall of the middle section.

3. The efficient steel reinforcement connection structure for prefabricated building construction according to claim 1, characterized in that, The length of the second connecting pipe (2) is greater than twice the length of the clearance groove (5).

4. The efficient steel reinforcement connection structure for prefabricated building construction according to claim 1, characterized in that, It also includes a temporary limiting ring (7), the inner wall of which is provided with a second internal thread that is adapted to the external thread (3) on the first connecting pipe (1).

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