CN201933614U - Welded steel bar threaded joint - Google Patents

Abstract

The utility model discloses a welded steel bar threaded joint. One end of the welded steel bar threaded joint is welded with a steel plate, and the other end of the welded steel bar threaded joint is provided with a threaded hole in threaded connection with the tip of a steel bar; the threaded hole is a blind hole; and the bottom of the threaded hole is provided with a tool recess. When the welded steel bar threaded joint is used for connecting the steel bar with the steel plate, the tip of the steel bar can be pressed against the bottom surface of the tool recess, so that the pre-tightening force of the tip is increased, and the connecting quality is enhanced.

Description

Welded steel threaded joints

technical field

The utility model relates to the technical field of building construction, in particular to a welded steel bar thread joint.

Background technique

In the construction of construction projects, sleeves are often used to connect steel bars to steel plates or steel beams and columns. There are two common connection methods. The first method uses a tapered thread sleeve for connection. As shown in Figure 1, the end of the steel bar 12 is provided with an external tapered thread 121, and the end of the tapered thread sleeve 11 provided with an internal tapered thread 111 is connected through a tapered thread. , the other end of the taper threaded sleeve 11 is welded on the specified position of the steel plate 13 through the weld seam 14 . The mechanical connection between the steel bar 12 and the steel plate 13 is realized by welding and taper screw connection. The disadvantage of this connection method is that the steel bar 12 and the tapered thread sleeve 11 are connected through a tapered thread, which cannot achieve equal strength connection.

Another way is to use a straight thread sleeve for connection. As shown in FIG. 2 , the end of the steel bar 22 is provided with an external straight thread 221 . The straight thread sleeve 21 is a through-hole type, and its inner side is provided with an internal straight thread 211. One end of the straight thread sleeve 21 is connected with the steel bar 22 through a straight thread, and the other end of the straight thread sleeve 21 is welded to the steel plate through a weld seam 24. 23 at the designated position. This method of welding and straight thread connection can also realize the mechanical connection between the steel bar 22 and the steel plate 23 . The shortcoming of this connection method is that, because the straight thread sleeve 21 is a through-hole type, the end of the steel bar 22 may push against the steel plate 23, thereby reducing the bearing capacity of the weld 24; 23 welded parts are relatively thin, and the wall of the straight thread sleeve 21 is easy to penetrate, which affects the connection quality.

Utility model content

In view of the above-mentioned defects in the prior art, the technical problem to be solved by the utility model is to provide a welded steel bar threaded joint, so as to realize a stable connection between the steel bar and the steel plate or the steel beam column.

The utility model provides a welded steel bar threaded joint, one end of the joint is used for welding with a steel plate, and the other end of the joint is provided with a threaded hole for threaded connection with the end of the steel bar. The hole is a blind hole, and the bottom of the threaded hole is provided with an undercut.

Preferably, a through hole is provided at the bottom of the threaded hole, and the diameter of the through hole is smaller than that of the threaded hole.

Preferably, the thread is a straight thread.

When the welded steel bar threaded joint of the utility model is used for connecting steel bars and steel plates, the ends of the steel bars can abut against the bottom surface of the undercut groove, increasing the pretightening force of the ends, thereby improving the connection quality.

Description of drawings

Fig. 1 is the structural schematic diagram when the tapered thread sleeve in the prior art is used for the connection between steel bars and steel plates;

Fig. 2 is the structural schematic diagram when the straight thread sleeve in the prior art is used for the connection between steel bar and steel plate;

Fig. 3 is a structural schematic diagram of a welded steel bar threaded joint and a steel plate welded in Embodiment 1 of the present invention;

Fig. 4 is the structural representation when the welded steel bar threaded joint in Fig. 3 is connected with the steel bar;

Fig. 5 is the structure diagram when the welded steel bar threaded joint and the steel plate are welded in the second embodiment of the utility model:

Fig. 6 is a structural schematic view of the welded steel bar threaded joint in Fig. 5 when it is connected to a steel bar.

Detailed ways

Describe the embodiment of the present utility model in detail below with reference to accompanying drawing.

Fig. 3 is a schematic diagram of the structure of the welded steel bar threaded joint in Embodiment 1 of the present invention when it is welded to a steel plate; Fig. 4 is a schematic structural diagram of the joint in Fig. 3 when it is connected to a steel bar.

As shown in Fig. 3 and Fig. 4, in the welded steel bar threaded joint 3 of an embodiment of the present invention, one end of the joint 3 is welded and connected with the steel plate 33 to form a weld 34, and the other end of the joint 3 is connected with the steel bar 32 by thread . As preferably, the present embodiment adopts straight threaded connection, the other end of joint 3 is provided with the straight threaded hole 35 that is used for connecting with reinforcing bar 32, and threaded hole 35 is provided with inner straight thread 311, and the end of reinforcing bar 32 is provided with outer straight threaded hole 35. The thread 321, the inner straight thread 311 and the outer straight thread 321 coincide. Straight thread connection is adopted between joint 3 and steel bar 32, and straight thread hole 35 is a blind hole, and the bottom of straight thread hole 35 is provided with relief groove 37.

In this embodiment, the connection between the joint 3 and the steel bar 32 is through a straight thread, which can achieve equal strength connection. After the end of the steel bar 32 is screwed into the straight threaded hole 35 of the joint 3, it can lean against the bottom surface of the undercut 37 to form a certain pre-tightening force and improve the strength of the connection. In addition, since the straight threaded hole 35 is a blind hole, it can effectively prevent the parts around the weld seam 34 from being penetrated, thereby improving the welding quality.

Fig. 5 is a schematic diagram of the structure of the welded steel bar threaded joint and the steel plate in the second embodiment of the present invention; Fig. 6 is a structural schematic diagram of the welded steel bar threaded joint in Fig. 5 when it is connected to the steel bar.

As shown in Figures 5 and 6, the difference between the second embodiment and the first embodiment is that the bottom of the straight threaded hole 35 is provided with a through hole 38 communicating with the undercut 37, and the diameter of the through hole 38 is smaller than that of the straight threaded hole 35. diameter. The purpose of setting the through hole 38 is in order to reduce the weight of the joint 3. The diameter of the through hole 38 is smaller than the straight threaded hole 35, so that the end of the steel bar 32 can lean against the bottom of the straight threaded hole 35, and it can also prevent welding seams in addition. The area around 34 is penetrated to ensure welding quality.

When the welded steel bar thread joint of the embodiment of the present invention is used to connect steel bars and steel plates, only straight threads need to be processed at the ends of the steel bars during on-site construction, and only a few small equipment are needed on the construction site, which saves space and manpower. Conducive to on-site construction.

The straight thread of the welded steel bar of the utility model can also be used for the connection between the steel bar, the steel beam and the steel column, which is obvious to those skilled in the art, and will not be repeated here.

Certainly, what is described above is the preferred embodiment of the present utility model, and it should be pointed out that for those of ordinary skill in the art, some improvements and modifications can be made without departing from the principle of the present utility model. And retouching are also regarded as the scope of protection of the present utility model.

Claims (3)

1. A welded steel bar threaded joint, one end of the joint is used for welding with the steel plate, and the other end of the joint is provided with a threaded hole for threaded connection with the end of the steel bar, it is characterized in that the threaded hole is a blind hole, the bottom of the threaded hole is provided with an undercut. 2. The welded steel bar threaded joint according to claim 1, wherein a through hole is provided at the bottom of the threaded hole, and the diameter of the through hole is smaller than the diameter of the threaded hole. 3. The welded steel bar threaded joint according to claim 1 or 2, characterized in that the thread is a straight thread.

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