CN103276906A - Steel bar connection method and matched fastener thereof - Google Patents

Abstract

The invention relates to a method for connecting steel bars, which mainly includes the following process steps: straightening the steel bars; cutting a tenon at the end of the steel bars; tenon jointing of the steel bars, and fitting matching fasteners on the tenon joints of the steel bars and tightening bolts. The present invention also provides a fastener used in conjunction with the above method, which is composed of two symmetrical steel semi-cylindrical bodies. One side of the two bodies is connected together by a hinge, and the other side is provided with a flange. The invention has simple operation, fewer processing procedures, reduces labor intensity of workers, improves production efficiency and saves cost. At the same time, the fastener used in conjunction with the method of the present invention has a simple structure and is easy to use, which can improve loading and unloading speed and connection reliability, improve construction quality, and facilitate construction management.

Description

Steel bar connection method and supporting fasteners

technical field

The invention relates to a building construction method, in particular to a steel bar connection method. The invention also relates to a building component, especially a fastener for connecting steel bars.

Background technique

At present, there are mainly three types of mechanical connection methods for large-diameter steel bars:

1. Steel sleeve extrusion connection: Insert the ribbed steel bar to be connected into a special sleeve, and use a hydraulically driven extruder to press several times laterally to cause plastic deformation of the steel sleeve and plastic deformation of the sleeve After that, it will be tightly occluded with the ribbed steel bar to achieve the effect of connection. The crimping force must be able to protect the tight bite between the sleeve and the steel bar. Therefore, the matching degree of the sleeve and the steel bar and the quality of the sleeve are high. When using this method, the processing equipment is cumbersome, the labor intensity of the workers is high, the connection speed is slow, and the sleeve is large and the cost is high;

2. Rebar tapered thread sleeve connection: it uses the mechanical occlusal force of the thread to transmit tension or pressure, and uses a tapered threaded sleeve to butt the ends of two steel bars together. When using this method, the quality of the joint is not stable enough, and the pitch is single, and the connection strength is not ideal for steel bars that are too thick or too thin. Moreover, a certain tightening torque must be applied when the steel bar is connected with the sleeve to ensure the quality of the connection. If the worker neglects to tighten it for a while, or the steel bar is bent or has a horseshoe-shaped cut, it is easy to produce incomplete threads, leaving hidden dangers to the quality of the connection;

3. Steel bar straight thread sleeve connection: The end of the steel bar to be connected is rolled into a regular straight thread with a rolling process, and then the two steel bars are relatively tightened with a matching straight thread sleeve to realize the connection. The upsetting straight thread connection is not only a complicated process, but also the metallographic structure of the head of the steel bar after upsetting will change. If it is not tempered, it will produce stress concentration and reduce ductility, which is not conducive to improving the stress of the joint. Moreover, when the steel bar itself is rolling threads, the tolerance is relatively large, the processing quality control of the thread head is difficult, the stress condition of the thread rolling wheel is harsh, and the working life is low.

In summary, the above three connection technologies are all connected by sleeves, and the requirements for steel bars of different diameters

There are sleeves of different diameters used in conjunction with it, and there are many specifications required for the sleeve. When operating, first install one end of the connecting sleeve on the end of the basic steel bar and tighten it in place with a pipe wrench, then clamp the connecting sleeve in different directions, and pass the steel bar to be connected through the different direction clamps. The hole is centered, screwed into the connecting sleeve and tightened in place. The construction is relatively difficult and the quality is not easy to guarantee.                 

Contents of the invention

The purpose of the present invention is to provide a technical solution capable of overcoming the above-mentioned defects of the prior art.

The technical solution of the present invention is: a steel bar connection method, mainly comprising the following process steps:

Straightening steel bars;

Cut tenon at the end of the bar;

Butt the steel bars to be connected through the tenon, set the matching fasteners on the tenon joints, and tighten the bolts passing through the through holes of the fasteners.

The preparation method of the tenon at the end of the steel bar is as follows: at the end of the steel bar, cut the steel bar from the middle along the axial direction, with a length of 100mm, and then remove half of the cut steel bar to form the tenon.

The present invention also provides a fastener that is used in conjunction with the above steel bar connection method and is simple to operate and reliable in connection. The fastener consists of two symmetrical steel semi-cylindrical bodies. One side of the two bodies is connected together by a hinge, and the other side is provided with a flange.

The size and shape of the flanges of the two bodies are the same, and a number of through holes are arranged on them, and bolts can be arranged in the through holes.

Beneficial effects of the present invention: the steel bar connection method of the present invention is simple in operation, less in processing steps, reduces labor intensity of workers, and improves production efficiency. The fastener used in conjunction with the method of the present invention has a simple structure and is convenient to use, which can improve loading and unloading speed and connection reliability, improve construction quality, and facilitate construction management.

Description of drawings

Figure 1 is a schematic diagram of a tenon of a steel bar.

Figure 2 is a schematic diagram of the fastener.

Figure 3 is a schematic diagram of a steel bar connection.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

The present invention mainly comprises following processing steps:

1. Straighten the steel bar;

2. Cut the tenon at the end of the steel bar: as shown in Figure 1, first cut the end of the steel bar 1 from the middle along the axial direction of the steel bar, with a length of 100mm, and then remove half of the cut to form the tenon 2;

3. Butt the tenons of the two steel bars, use the matching fasteners to fit the butt joints of the steel bars, and tighten the bolts on the fasteners.

The present invention also provides a fastener that can be used in conjunction with the above method. As shown in FIG. 2 , the fastener is composed of two symmetrical steel semi-cylindrical bodies 3 . One side of the two bodies is connected together by a hinge 4 , and flanges 5 are provided on the other side. The flanges have the same size and shape, and are provided with some through holes 6, and bolts can be arranged in the through holes. When in use, as shown in Figure 3, the fasteners are set on the mortise joints of the steel bars 7 to be connected, and the bolts are tightened, which makes the construction operation easier. At the same time, due to the tenon connection, the steel bars interlock with each other, which increases the connection performance of the steel bars. Especially when the vertical steel bars are connected, the joints are seated and interlocked with each other. After the fasteners are tightened, the connection quality is stable and reliable.

The parts not involved in the present invention are the same as the prior art or can be realized by adopting the prior art.

Claims (4)

1. connecting method for reinforcing bars is characterized in that comprising following processing step:

The straightening reinforcing bar;

At the end reinforced tenon that cuts out;

With reinforcing bar tenon butt joint, be sleeved on the reinforcing bar junction and tighten with supporting fastener.

2. connecting method for reinforcing bars according to claim 1 is characterized in that the preparation method of end reinforced tenon is: vertically reinforcing bar is cut open from the centre earlier, length is 100mm, will cut half removal of reinforcing bar then open, forms tenon.

3. a fastener that is applied to the described connecting method for reinforcing bars of claim 1 is characterized in that this fastener is made of the body of the steel semicircle tubular of two symmetries; One side of two bodies is connected through the hinge together, and another side is equipped with flange.

4. according to the described fastener of claim 3, it is characterized in that the flange size of described two bodies is all identical with shape, which is provided with some through holes.

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