Mechanical quick connecting device for large-diameter steel bars

Abstract

The utility model relates to the technical field of reinforcing steel bars, in particular to a mechanical quick connecting device for large-diameter reinforcing steel bars. The mechanical quick connecting device for the large-diameter steel bars comprises a middle connecting cylinder A and a middle connecting cylinder B which can be connected and locked with the middle connecting cylinder A; an inserting square column is fixedly embedded in one end of the middle connection cylinder A, tangent planes are arranged on the four side faces of the inserting square column, and limiting holes are formed in the tangent planes; an inserting cavity is formed in one end of the middle connection cylinder B, mounting cavities are formed in the four inner cavity walls of the inserting cavity, and lock catch assemblies are mounted in the mounting cavities. According to the large-diameter reinforcing steel bar, the inserting square column on the middle connecting cylinder A is inserted into the inserting cavity formed in the middle connecting cylinder B through the mechanical rapid connecting device, the locking rod is inserted into the limiting hole formed in the inserting square column, and therefore locking of the middle connecting cylinder A and the middle connecting cylinder B is completed, two large-diameter reinforcing steel bars can be rapidly connected in a butt joint mode, and the connecting efficiency is improved. And the whole operation is simple only through direct insertion.

Description

Technical Field

[0001] The utility model relates to the technical field of steel bars, in particular to a mechanical quick connection device for large-diameter steel bars. Background Art

[0002] Some large buildings will construct circular extended foundations with a foundation concrete strength of C40. The main force-bearing bars of the foundation are HRB400E steel bars, most of which have diameters between 16mm and 32mm. To ensure the bearing capacity of the foundation under dynamic loads, the upper longitudinal reinforcement of the foundation needs to be made of a complete steel bar. The existing formed steel bars are generally connected by binding, lap joints, welding, extrusion sleeves and grouting sleeves to achieve a combined connection of the steel cage, which is costly and has low labor efficiency.

[0003] Therefore, it is necessary to provide a new large-diameter steel bar mechanical quick connection device to solve the above technical problems. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a mechanical quick connection device for large-diameter steel bars.

[0005] The large diameter steel bar mechanical quick connection device provided by the utility model comprises:

[0006] Zhonglian A tube, and

[0007] A middle link B tube that can be connected and locked with the middle link A tube;

[0008] One end of the central link A tube is fixedly embedded with an inserted square column, and the four sides of the inserted square column are provided with cut surfaces, and each of the cut surfaces is provided with a limiting hole;

[0009] One end of the central link B tube is provided with an insertion cavity, and four inner cavity walls of the insertion cavity are provided with installation cavities, and a locking assembly is installed in each of the installation cavities;

[0010] Wherein, the locking assembly includes a locking rod, which is inserted into the installation cavity and elastically connected to the installation cavity.

[0011] Preferably, a spring is fixedly mounted on one end of the locking rod, and the other end of the spring is fixedly connected to the inner cavity wall of the mounting cavity.

[0012] Preferably, the other end of the locking rod extends to the middle of the installation cavity, and the rod head of the locking rod facing the insertion cavity is provided with an inclined surface.

[0013] Preferably, the insertion square column and the insertion cavity match each other.

[0014] Preferably, a threaded connection A hole is provided at the other end of the central link A tube.

[0015] Preferably, a threaded connection B hole is provided at the other end of the central link B tube.

[0016] Compared with the related art, the large diameter steel bar mechanical quick connection device provided by the utility model has the following beneficial effects:

[0017] The utility model utilizes a central link A tube and a central link B tube to be respectively fixedly connected with two large-diameter steel bars by threads, and then the insertion square column on the central link A tube is inserted into the insertion cavity provided in the central link B tube, and the locking rod is inserted into the limiting hole provided in the insertion square column, thereby completing the locking of the central link A tube and the central link B tube. Therefore, the two large-diameter steel bars can be quickly butt-jointed, and the overall operation is simple by only direct insertion, which solves the problem of high cost and low labor efficiency of the existing large-diameter steel cage combined connection of steel bars through binding overlap, welding, extrusion sleeve and grouting sleeve connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic structural diagram of a preferred embodiment of a mechanical quick connection device for large diameter steel bars provided by the utility model;

[0019] Figure 2 for Figure 1 Schematic diagram of the explosion structure shown;

[0020] Figure 3 for Figure 2 The structural schematic diagram of the A tube of the middle link is shown;

[0021] Figure 4 for Figure 3 The cross-sectional structure diagram of the middle link A tube is shown;

[0022] Figure 5 for Figure 2 The cross-sectional structure diagram of the middle link B tube is shown.

[0023] Numbers in the figure: 1. Central link A tube; 1a. Threaded connection A hole; 11. Inserted square column; 12. Section; 12a. Limit hole; 2. Central link B tube; 2a. Threaded connection B hole; 2b. Insertion cavity; 2c. Installation cavity; 3. Locking assembly; 31. Locking rod; 311. Inclined surface; 32. Spring; 4. Large diameter steel bar; 5. Threaded connection section. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0025] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0026] See also Figures 1 to 5 The embodiment of the utility model provides a large diameter steel bar mechanical quick connection device, and the large diameter steel bar mechanical quick connection device comprises: a central link A tube 1 and a central link B tube 2.

[0027] In the embodiments of the present invention, please refer to Figure 2 , Figure 3 , Figure 4 and Figure 5 The central tube A 1 and the central tube B 2 can be connected and locked, and one end of the central tube A 1 is fixedly embedded with an inserted square column 11, and the four sides of the inserted square column 11 are provided with cut surfaces 12, each of which is provided with a limiting hole 12a, and the other end of the central tube A 1 is provided with a threaded connection A hole 1a;

[0028] One end of the central B tube 2 is provided with an insertion cavity 2b, and the insertion square column 11 matches the insertion cavity 2b, and the four inner cavity walls of the insertion cavity 2b are provided with installation cavities 2c, and a locking assembly 3 is installed in each of the installation cavities 2c, specifically, a spring 32 is fixedly installed on one end of the locking rod 31, and the other end of the spring 32 is fixedly connected to the inner cavity wall of the installation cavity 2c, and the other end of the locking rod 31 extends to the middle of the installation cavity 2c, and the rod head of the locking rod 31 facing the insertion cavity 2b is provided with a slope 311, and the other end of the central B tube 2 is provided with a threaded connection B hole 2a.

[0029] It should be noted that: when two large-diameter steel bars 4 are quickly butted together, a threaded connection section 5 is firstly provided at the butted ends of the two large-diameter steel bars 4, so that the two large-diameter steel bars 4 are respectively threadedly connected to the middle link A tube 1 and the middle link B tube 2;

[0030] After the intermediate A tube 1 and the intermediate B tube 2 are respectively threadedly fixedly connected with the two large-diameter steel bars 4, the insertion square column 11 on the intermediate A tube 1 is inserted into the insertion cavity 2b opened in the intermediate B tube 2. Since the four sides of the insertion square column 11 are provided with cut surfaces 12, and the rod heads of the four locking rods 31 facing the insertion cavity 2b are provided with inclined surfaces 311, the four cut surfaces of the insertion square column 11 abut against the corresponding locking rods 31. As the insertion square column 11 is deeply inserted along the insertion cavity 2b, the cut surfaces of the insertion square column 11 abut against the locking rod 31, and the spring 32 is compressed until the locking rod 31 corresponds to the limiting hole 12a opened in the insertion square column 11. Then, under the action of the spring, the locking rod 31 is inserted into the limiting hole 12a opened in the insertion square column 11, thereby completing the locking of the intermediate A tube 1 and the intermediate B tube 2 (as shown in the attached figure). Figure 1As shown), the two large-diameter steel bars 4 can be quickly connected, and the overall operation is simple by simply plugging them in, which solves the problem of high cost and low labor efficiency caused by the existing large-diameter steel cages that achieve combined connection of steel bars through binding overlap, welding, extrusion sleeves and grouting sleeves.

[0031] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A mechanical quick connection device for large diameter steel bars, characterized in that: include: Central A tube (1), and A middle link B cylinder (2) which can be connected and locked with the middle link A cylinder (1); One end of the central link A tube (1) is fixedly engaged with an inserted square column (11), and four side surfaces of the inserted square column (11) are provided with cut surfaces (12), and each of the cut surfaces (12) is provided with a limiting hole (12a); One end of the central link B tube (2) is provided with an insertion cavity (2b), and four inner cavity walls of the insertion cavity (2b) are provided with installation cavities (2c), and a locking assembly (3) is installed in each of the installation cavities (2c); Wherein, the locking assembly (3) comprises a locking rod (31), and the locking rod (31) is inserted into the installation cavity (2c) and elastically connected to the installation cavity (2c).

2. The large diameter steel bar according to claim 1 adopts a mechanical quick connection device, characterized in that: A spring (32) is fixedly mounted on one end of the locking rod (31), and the other end of the spring (32) is fixedly connected to the inner cavity wall of the mounting cavity (2c).

3. The large diameter steel bar according to claim 2 adopts a mechanical quick connection device, characterized in that: The other end of the locking rod (31) extends to the middle of the installation cavity (2c), and the rod head of the locking rod (31) facing the insertion cavity (2b) is provided with an inclined surface (311).

4. The large diameter steel bar mechanical quick connection device according to claim 1 is characterized in that: The insertion square column (11) and the insertion cavity (2b) match each other.

5. The large diameter steel bar mechanical quick connection device according to claim 1 is characterized in that: The other end of the middle link A cylinder (1) is provided with a threaded connection A hole (1a).

6. The large diameter steel bar mechanical quick connection device according to claim 1 is characterized in that: The other end of the central link B tube (2) is provided with a threaded connection B hole (2a).

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