CN104314240A - Grouting anchor type rebar connection sleeve and manufacturing method thereof - Google Patents

Abstract

A slurry-anchor steel bar connection sleeve and its manufacturing method, characterized in that: a through hole is arranged in the sleeve body, elastic rubber rings are installed at both ends of the through hole, and a grouting material inlet and a grouting material inlet are arranged on the sleeve body. Material outlet. The processing method of the slurry-anchored steel bar connection sleeve includes the following steps: (1) the processing raw material is low-carbon steel or low-alloy steel seamless steel pipe; (2) the internal thread is machined from both sides of the steel pipe from the outside to the inside by a processing machine tool; ( 3) Drill a material inlet and outlet with a diameter of about 10mm at the two ends of the steel pipe at a distance of about 20mm from the end; (4) Put rubber sealing rings on both ends of the steel pipe. The invention adopts seamless steel pipe, which not only has high strength and good plasticity, but also has stable quality and less material consumption, and adopts the method of processing thread on the inner wall of the steel pipe. Compared with foreign casting technology and domestic steel rod cutting technology, the degree of mechanization High, less processing, high production efficiency, which can greatly reduce the cost of the sleeve.

Description

Slurry-anchored steel bar connecting sleeve and manufacturing method thereof

Technical field

The invention relates to the technical field of reinforced concrete, in particular to a slurry-anchored steel bar connecting sleeve and a manufacturing method thereof.

Background technique

In traditional cast-in-place concrete structures, mechanical connection methods such as lap joints, welded connections, or extruded sleeves are often used to connect steel bars. The construction method is relatively complicated and must be completed before pouring concrete. The connection of steel bars cannot be assembled. style construction. At present, in the actual prefabricated concrete buildings, the steel bar connecting sleeves used are steel castings, iron castings, and steel rods or thick-walled steel pipes processed by mechanical cutting. If the corresponding technical requirements are to be met, the processing and manufacturing costs are higher.

  Contents of the invention

The object of the present invention is to provide a steel bar connection between a single steel bar connection and a fabricated concrete building prefabricated component. The butt ends of the two connecting steel bars are combined through the connecting sleeve and the cement mortar poured into the internal space. A slurry-anchored steel bar connecting sleeve for a connecting body and a manufacturing method thereof.

The present invention is realized in this way, it comprises sleeve body, elastic rubber sealing ring, grouting material inlet hole and grouting material outlet hole, it is characterized in that: a through hole is arranged in the sleeve body, elastic rubber is installed at both ends of the through hole The ring is provided with a grouting material inlet and a grouting material outlet on the sleeve body.

The internal thread of the slurry-anchor steel bar connecting sleeve is helical and processed by a machine tool. The internal thread has a thread height of 1-5 mm and a thread pitch of 1-5 mm.

The processing method of the slurry anchor type steel bar connection sleeve comprises the following steps:

(1) Low-carbon steel or low-alloy steel seamless steel pipes are used as raw materials for processing;

(2) Use a processing machine tool to carve out the internal thread from both sides of the steel pipe from the outside to the inside;

(3) Drill the inlet and outlet with a diameter of about 10mm at the two ends of the steel pipe about 20mm away from the end;

(4) Put rubber sealing rings on both ends of the steel pipe.

The invention adopts a slurry-anchor type steel bar connecting sleeve to connect single steel bars or steel bars of prefabricated assembled concrete components. Its characteristic is that the sleeves for connecting steel bars of the same diameter series and similar diameter series are made of low-carbon steel or low-alloy steel seamless steel pipes, and internal threads are processed on the inner wall of the steel pipes by special turning tools to form slurry-anchored steel bar connection sleeves . Compared with the cast iron used abroad and the steel bars currently used in China, the seamless steel pipe used in the present invention not only has high strength and good plasticity, but also has stable quality and less material consumption, and adopts the method of processing threads on the inner wall of the steel pipe, which is different from foreign countries. Compared with the domestic steel rod cutting process, the advanced casting process has a high degree of mechanization, less processing and high production efficiency, which can greatly reduce the cost of the sleeve.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing:

Fig. 1 is a schematic structural view of a slurry-anchored steel bar connecting sleeve;

Figure 2 is a schematic diagram of the dimensions of each part of the slurry-anchored steel bar connection sleeve.

In the figure, L-the length of the sleeve, L1-the distance between the grout outlet or the grouting hole and the end of the sleeve, t-the thickness of the sleeve before processing, D1-the distance between the concave points of the thread, D2-the distance between the convex points of the thread The distance, a- is the thread pitch.

Detailed ways

As shown in Figure 1-2, the prefabricated reinforced concrete structure steel bar connection sleeve includes a sleeve body 1, a steel bar to be connected 2, a rubber sealing ring 3, an internal thread 4, a grouting material inlet 5 and a grouting material outlet 6. There is a through hole in the sleeve body 1, and elastic rubber rings 3 are installed at both ends of the through hole. The grouting material inlet 5 and the grouting material outlet 6 are arranged on the sleeve body 1. The sleeve body 1 is a low-carbon steel or low-alloy steel seamless steel pipe, and the internal thread is turned out by a turning tool. The internal thread of the slurry-anchored steel bar connection sleeve is helical and processed by a machine tool. Structure, thread height 1~5mm, thread pitch 1~5mm; said prefabricated reinforced concrete structure steel connection sleeve, the sleeve body 1 is low carbon steel or low alloy steel seamless steel pipe. The purpose of increasing the bonding strength between the grouting material and the sleeve is achieved by adjusting the thread height and thread spacing. The through holes at both ends of the sleeve body 1 are equipped with elastic rubber sealing rings 3 with holes, which pass through at a certain distance from the end of the through hole. Drilling grouting material inlet 5 and grouting material outlet 6. When connecting the specific steel bars, first put the two steel bars 2 to be connected into the sleeve through the rubber sealing ring from both sides of the sleeve body 1, and then pour the grouting material from the grouting material inlet 5, after there is no porosity inside the sleeve The grouting material will flow out of the grouting material outlet 6, indicating that the grouting is completed, and after a certain period of maintenance and hardening, the steel bars to be connected can be connected into a whole, and the effect of equal-strength connection can be achieved. The internal thread of the slurry-anchor steel bar connecting sleeve is helical and processed by a machine tool. The internal thread structure has a thread height of 1-5 mm and a thread pitch of 1-5 mm. The processing method of the prefabricated reinforced concrete structure steel bar connection sleeve includes the following steps:

(1) Low-carbon steel or low-alloy steel seamless steel pipes are used as raw materials for processing;

(2) Use a processing machine tool to carve out the internal thread from both sides of the steel pipe from the outside to the inside;

(3) Drill a feed port and a discharge port with a diameter of about 10 mm at the two ends of the sleeve body 1 about 20 mm away from the end;

(4) Put rubber sealing rings on both ends of the sleeve body 1 .

Claims (3)

1. A slurry-anchor type steel bar connecting sleeve, which comprises a sleeve body, an elastic rubber seal ring, a grouting material inlet hole and a grouting material outlet hole, is characterized in that: a through hole is arranged in the sleeve body, and the two through holes The end is equipped with an elastic rubber ring, and a grouting material inlet and a grouting material outlet are arranged on the sleeve body. 2. The slurry-anchored steel bar connection sleeve according to claim 1, characterized in that: the internal thread is spiral, the height of the internal thread is 1-5 mm, and the thread pitch is 1-5 mm. 3. The slurry-anchored steel bar connection sleeve according to claim 1, characterized in that: the processing method of the slurry-anchored steel bar connection sleeve comprises the following steps: (1) Low-carbon steel or low-alloy steel seamless steel pipes are used as raw materials for processing; (2) Use a processing machine tool to carve out the internal thread from both sides of the steel pipe from the outside to the inside; (3) Drill the inlet and outlet with a diameter of about 10mm at the two ends of the steel pipe about 20mm away from the end; (4) Put rubber sealing rings on both ends of the steel pipe.