CN218437817U - Novel combined steel bar butt joint sleeve - Google Patents

Abstract

The utility model relates to a novel combination reinforcing bar is to nipple. For overcoming the structure that prior art is difficult for forming mutual interlock, and the defect of cold extrusion resistance, this novel combination reinforcing bar butt joint cover includes the sleeve, still includes spiral endotheca mechanism, and this spiral endotheca mechanism includes two spiral billet that relatively spiral, welds jointly in the middle of two spiral billets on a circular basal disc, and this circular basal disc diameter equals the external diameter of treating the connecting reinforcement, and two reinforcing bars of treating to connect insert two spiral billets that relatively spiral respectively in two orientations from top to bottom, treat that the reinforcing bar terminal surface of connecting supports respectively on the upper and lower surface of circular basal disc, the muffjoint is outside two spiral billets that relatively spiral, and the reinforcing bar hardness = sleeve hardness of treating to connect < the hardness of two spiral billets that relatively spiral. This novel combination reinforcing bar butt joint cover has simple structure, laborsaving convenience, firm in connection's advantage, is fit for in the building engineering, uses when connecting the reinforcing bar, especially connecting the cylinder reinforcing bar.

Description

Novel combined steel bar butt joint sleeve

Technical Field

The utility model relates to a novel combination reinforcing bar is to nipple.

Background

2018.07.27, which is a chinese utility model with publication number CN 207660184U, discloses a steel bar cold extrusion sleeve connection structure, which comprises a cold extrusion sleeve connection; the first steel bar and the second steel bar are respectively inserted into the cold extrusion sleeve connection from two ends of the cold extrusion sleeve connection, and are fixedly connected with the cold extrusion sleeve connection by adopting a cold extrusion process; and the connecting axis of the cold extrusion sleeve, the axis of the first steel bar and the axis of the second steel bar are overlapped. The application provides a reinforcing bar cold extrusion sleeve connection structure easy operation relatively, and connection technology is stable, and the general personnel can the operation of going on duty with training slightly, need not skilled technician, and it is little influenced by environment and artificial operation factor to can avoid reinforcing bar axis skew and the difficult problem of on-the-spot reinforcing bar of connecing department of buckling.

The utility model discloses an adopt simple cold extrusion sleeve, the simple butt joint of two sections reinforcing bars through the cold extrusion realization is comparatively convenient. However, as shown in the figure, the sleeve is suitable for connecting with the threaded reinforcing steel bar.

When used for connecting common steel bars, the steel bars have the following two disadvantages: 1. the extrusion resistance is large; 2. the steel bars in the sleeve are compressed to shrink, but it is difficult to produce a significant mutual engagement structure, as shown in fig. 1, and the connection is not firm.

Disclosure of Invention

The to-be-solved technical problem of the utility model is how to overcome the above-mentioned defect of prior art, a novel combination reinforcing bar splicing sleeve is provided.

For solving above-mentioned technical problem, this novel combination reinforcing bar butt-joint sleeve includes the sleeve, and this sleeve both ends can be overlapped respectively on two reinforcing bars of treating the connection to cramp under outside cold extrusion power, the sleeve is made by the wrought iron, the reinforcing bar cross section of treating the connection is circular, makes its characterized in that by the wrought iron: the steel bar connecting device is characterized by further comprising a spiral inner sleeve mechanism, wherein the spiral inner sleeve mechanism comprises two spiral steel bars which are relatively spiral, the middle of each spiral steel bar is welded on a circular base plate together, the diameter of the circular base plate is equal to the outer diameter of a steel bar to be connected, the two steel bars to be connected are inserted into the two spiral steel bars which are relatively spiral from the upper direction and the lower direction respectively, the end faces of the steel bars to be connected are abutted to the upper surface and the lower surface of the circular base plate respectively, the sleeve is sleeved outside the two spiral steel bars which are relatively spiral, and the hardness of the steel bars to be connected = the hardness of the sleeve is less than the hardness of the two spiral steel bars which are relatively spiral.

In use, the sleeve is first taken out and sleeved on one reinforcing steel bar head, then the spiral inner sleeve mechanism is taken out, the lower parts of two spiral reinforcing steel bars which are oppositely coiled are sleeved on the reinforcing steel bar head, the top ends of the reinforcing steel bar heads are abutted on the lower surface of the circular base plate, then the other reinforcing steel bar head is taken out and inserted into the upper half parts of the two spiral reinforcing steel bars which are oppositely coiled, and the lower end of the other reinforcing steel bar head is pressed on the upper surface of the circular base plate, as shown in figure 4.

The sleeve is then moved up and completely over the two oppositely spiraled steel helical strips as shown in figure 5.

And finally, extruding the sleeve from the outer side by using a cold extruding tool (similar to a hydraulic clamp and the like) until the inner wall of the sleeve is contacted with the outer circumference of the steel bar. Through cold extrusion, the sleeve firmly cramps on two reinforcing bars, just sleeve and reinforcing bar are embedded into respectively to the inside and outside both sides of spiral billet, form the structure of interlock each other, as shown in fig. 6.

So design, the sleeve inside wall is crowded into to the outer fringe of spiral billet, and on the outer periphery wall of reinforcing bar was crowded into to the inner edge of spiral billet, formed mutual interlock structure, difficult pine takes off, and is more firm.

And because spiral billet inner edge, outer fringe are all thinner, and the spiral billet is greater than reinforcing bar and sleeve hardness, consequently, during cold extrusion, the resistance is littleer, and is more laborsaving.

Preferably, the cross section of the spiral steel bar is prismatic, and one diagonal line of the prismatic shape is parallel to the axial lead of the sleeve. So design, the sleeve and the reinforcing bar of the spiral billet of being convenient for imbed both sides simultaneously, and extrusion resistance is little.

This novel combination reinforcing bar butt joint cover has simple structure, laborsaving convenience, firm in connection's advantage, is fit for in the building engineering, uses when connecting the reinforcing bar, especially connecting the cylinder reinforcing bar.

Drawings

The novel combined steel bar butt-joint sleeve is further explained by combining the attached drawings as follows:

FIG. 1 is a schematic cross-sectional view of a conventional sleeve-connected steel bar (half of the bar is cut along the axial line);

fig. 2 is a schematic three-dimensional structure diagram of a spiral inner sleeve mechanism in the novel combined reinforcing steel bar butt-joint sleeve;

fig. 3 is a schematic perspective view of a sleeve in the novel combined reinforcing bar splicing sleeve;

fig. 4 is a schematic perspective view of two reinforcing bars to be connected inserted into two oppositely spiraled spiral steel bars;

FIG. 5 is a schematic cross-sectional view (half cut along the axial center line) of the sleeve of FIG. 4 after being pushed over the two bars to be connected;

fig. 6 is a schematic cross-sectional view (half of which is cut along the axial line) of the new combined steel bar butt-joint sleeve shown in fig. 5, which is sleeved on the ends of two steel bars and fixed by extrusion.

In the figure: 1 is a sleeve, 2 is a reinforcing steel bar, 3 is two spiral steel bars which are relatively coiled, and 4 is a circular base plate.

Detailed Description

The first implementation mode comprises the following steps: as shown in fig. 2-6, the novel combined steel bar butting sleeve comprises a sleeve 1, two ends of the sleeve 1 can be respectively sleeved on two steel bars 2 to be connected and tightened under external cold extrusion force, the sleeve 1 is made of wrought iron, the cross section of each steel bar 2 to be connected is circular and is made of wrought iron, and the novel combined steel bar butting sleeve is characterized in that: it still includes spiral endotheca mechanism, and this spiral endotheca mechanism includes two spiral billet 3 that relatively spiral, and the joint welding is on a circular base plate 4 in the middle of two spiral billet 3, and this circular base plate 4 diameter equals the external diameter of treating connecting reinforcement 2, and two treat that connecting reinforcement 2 inserts two spiral billet 3 that relatively spiral from two upper and lower directions respectively, treat that the 2 terminal surfaces of connecting reinforcement are supported respectively on the upper surface of circular base plate 4, the lower surface, sleeve 1 cover is outside two spiral billet 3 that relatively spiral, and the 2 hardness = sleeve 1 hardness of the reinforcing bar of treating the connection < the hardness of two spiral billet 4 that relatively spiral.

The cross section of the spiral steel bar 4 is prismatic, and one diagonal line of the prismatic shape is parallel to the axial lead of the sleeve.

The wrought iron refers to relatively pure iron refined from pig iron. The carbon content is below 0.02%, and the steel is called forged iron or pure iron. The wrought iron has the advantages of soft texture, good plasticity, good ductility, wire drawing, low strength and hardness, and easy forging and welding. The hardness of the spring steel is generally not more than HB321, and can reach HRC60 after heat treatment.

The hardness of the steel bar 2 is smaller, and the hardness after quenching can be slightly improved compared with that before quenching. After quenching, the hardness increases with the increase of the carbon content, is approximately HRC 20-30 and is still far lower than the hardness of the spiral steel strip 3.

Claims (2)

1. The utility model provides a novel combination reinforcing bar butt joint cover, includes the sleeve, this sleeve both ends can be overlapped respectively on two reinforcing bars of treating to connect to cramp under the outside cold extrusion power, the sleeve is made by the wrought iron, the reinforcing bar cross section of treating to connect is circular, makes its characterized in that by the wrought iron: the spiral steel bar connecting device further comprises a spiral inner sleeve mechanism, the spiral inner sleeve mechanism comprises two spiral steel bars which are relatively coiled, the middle of the two spiral steel bars are welded on a circular base plate together, the diameter of the circular base plate is equal to the outer diameter of a steel bar to be connected, the two steel bars to be connected are inserted into the two spiral steel bars which are relatively coiled from the upper direction and the lower direction respectively, the end faces of the steel bars to be connected are respectively abutted to the upper surface and the lower surface of the circular base plate, the sleeve is sleeved outside the two spiral steel bars which are relatively coiled, and the hardness of the steel bars to be connected = the hardness of the sleeve is less than the hardness of the two spiral steel bars which are relatively coiled.

2. The novel combined reinforcing bar butt joint sleeve of claim 1, wherein: the cross section of the spiral steel bar is prismatic, and one diagonal line of the prismatic is parallel to the axial lead of the sleeve.

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