Threaded steel connector

Abstract

The utility model discloses a high strength screw thread steel connector which is characterized by the following technical scheme: the screw thread steel connector comprises a locking sleeve, a wedge-shaped block and a clamping spring, the inner surface of the wedge-shaped block is provided with a pointed protrusion, the outer surface is an arc wedge surface with a wedge shape, a plurality of wedge-shaped blocks are enclosed to form a structure for clamping steel bars, the outer surface of the plurality of wedge-shaped blocks after being enclosed is a conical structure with a small upper part and a large lower part, the conical structure is wedge-shaped matched with a conical inner cavity in the locking sleeve, the locking sleeve is sleeved on the outer side of the conical structure, a plurality of wedge-shaped blocks are enclosed to form a clamping spring mounting groove, and the clamping spring is mounted at the clamping spring mounting groove.

Description

Technical Field

[0001] This utility model relates to the field of civil engineering construction technology. Background Technology

[0002] In existing civil engineering construction, when the main reinforcing bars in beams and columns need to be connected, mechanical connections can be made using welding or sleeves. Welding refers to welding the main reinforcing bars to be connected using electric welding or aluminothermic welding. Sleeve connections, depending on the sleeve structure, can be divided into grouted sleeves and threaded sleeves. Threaded sleeves involve threading the ends of the main reinforcing bars to form threaded connections, and then using the threaded sleeve to connect two column reinforcing bars. Grouting sleeves involve inserting both ends of the main reinforcing bars into a grouting sleeve and connecting the main reinforcing bars to the grouting sleeve through grouting. Each of these connection methods has its advantages and disadvantages. Grouting connections are relatively cumbersome and time-consuming. Threaded sleeve connections require mechanical processing such as threading the main reinforcing bars, resulting in higher implementation costs. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a threaded steel connector that overcomes the technical drawback of requiring threaded connections in existing threaded steel connectors.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: A threaded steel connector, comprising a locking sleeve, wedge blocks, and a retaining ring, characterized in that the inner surface of the wedge block has a pointed protrusion, and the outer surface is an arc-shaped wedge surface with a wedge shape. Multiple wedge blocks are enclosed to form a structure for clamping the steel bar. The outer surface of the multiple wedge blocks is a conical structure with a smaller top and a larger bottom. This conical structure engages with the conical inner cavity of the locking sleeve in a wedge shape. The locking sleeve is fitted on the outside of the conical structure. Multiple wedge blocks are enclosed to form a retaining ring mounting groove, and the retaining ring is installed in the retaining ring mounting groove.

[0005] Furthermore, the height of the pointed protrusion is between 0.5 and 2 millimeters.

[0006] Furthermore, the wedge-shaped block is made of cast iron.

[0007] Furthermore, the locking sleeve is made of ordinary carbon steel.

[0008] Furthermore, the retaining ring is an open retaining ring.

[0009] The beneficial effects of this utility model are: This threaded steel connector has a simple structure. The wedge block adopts a modular design and has only three types of parts, making it simple and easy to implement.

[0010] This threaded steel connector has strong axial tensile strength and strong transverse shear strength. The tensile and shear strength of the threaded steel connector will be described in detail below with reference to specific embodiments. Attached Figure Description

[0011] Figure 1 This is a diagram showing the components of a threaded steel connector.

[0012] Figure 2 This is a cross-sectional view of a threaded steel connector.

[0013] Figure 3 This is a 3D view of the wedge-shaped block.

[0014] Figure 4 This is a 3D view of the wedge-shaped block.

[0015] Figure 5 This is the first step in using this threaded steel connector.

[0016] Figure 6 This is step two of using this threaded steel connector.

[0017] Figure 7 This is step three of the steps for using this threaded steel connector.

[0018] Figure 8 This is step four of the steps for using this threaded steel connector.

[0019] In the picture: 00 Concrete, 01 Bottom Reinforcement, 02 Top Reinforcement, 03 Wedge Fit, 04 Interlocking Fit 10. Locking sleeve; 11. Conical inner cavity. 20. Wedge-shaped block; 21. Pointed protrusion; 22. Arc-shaped wedge surface; 23. Arc-shaped groove. 30 snap ring. Detailed Implementation

[0020] refer to Figures 1 to 4 The threaded steel connector includes a locking sleeve 10, a wedge block 20, and a retaining ring 30. The wedge block 30 consists of multiple standardized modules. Specifically, the inner surface of the wedge block 20 has an engagement part with a pointed protrusion 21, and the outer surface has an arc-shaped wedge surface 22. The side between the inner and outer surfaces is a straight surface. After multiple wedge blocks 30 are enclosed, they form a cylindrical structure that clamps the main steel bar. The outer surface of the multiple wedge blocks is a conical structure that is smaller at the top and larger at the bottom. This structure engages with the conical inner cavity 11 in the locking sleeve 10 in a wedge shape.

[0021] An arc-shaped groove 23 is provided on the lower outer surface of the wedge block 20. After multiple wedge blocks are enclosed, the arc-shaped groove forms an annular retaining spring mounting groove for installing the retaining spring 30. That is, the retaining spring temporarily locks the multiple wedge blocks.

[0022] The following is in conjunction with the instruction manual appendix. Figure 5 To be continued Figure 8 This document provides a detailed explanation of how to use this threaded steel connector.

[0023] First, take ten wedge blocks 20 and initially place them at the connecting end of the lower reinforcing bar 01. Use snap rings 30 to initially fix the ten wedge blocks. After initial fixation, the ten wedge blocks 20 are initially connected to the lower reinforcing bar 01 through the pointed protrusions 21 on their inner surfaces. At this time, the pointed protrusions are not inserted into the lower reinforcing bar; they are maintained by friction. Then, place the locking sleeve on the upper reinforcing bar. At the same time, slowly insert the lower connecting end of the upper reinforcing bar 02 into the space formed by the ten wedge blocks from top to bottom, and forcefully insert it until it abuts against the lower reinforcing bar 01. Quickly place the locking sleeve from top to bottom onto the cone formed by the ten wedge blocks, and use a special hammering tool, such as a hammer, to strike the locking sleeve 10 from top to bottom. Through striking, the locking sleeve has a closing and locking action on the wedge blocks, i.e., continuous striking. During the process of closing the wedge blocks, the locking sleeve 10 generates a horizontal component force from the vertical striking force through the wedge fit. This horizontal component force causes the pointed protrusions on the inner surface of the wedge blocks to gradually penetrate the surface of the upper and lower reinforcing bars. The upper and lower reinforcing bars are threaded steel bars. Through continuous striking, the pointed protrusions penetrate the surface of the threaded steel bars, realizing the engagement of the wedge blocks with the upper and lower reinforcing bars. Moreover, the locking sleeve provides circumferential constraint on the ten wedge blocks around the perimeter, thereby realizing the engagement connection of this connector with the upper and lower reinforcing bars.

[0024] After the above mechanical connection is completed, concrete is poured into the mold cavity where the threaded steel connector is located. After pouring, the periphery of the threaded steel connector is filled with concrete, and then it is cured. The cured concrete fixes and constrains the threaded steel connector, further enhancing the connection reliability of the threaded steel connector.

[0025] Connection strength analysis of this threaded steel connector: As shown in the above connection process, after the concrete is poured and cured, a wrapping structure is formed around the threaded steel connector. The reinforced concrete within it forms a limiting structure in the axial and circumferential three-dimensional space of the locking sleeve. Axially, the locking sleeve is restricted and will not experience axial displacement. When the upper reinforcing bar 02 is subjected to tension, due to the interlocking connection between the upper reinforcing bar and the ten wedge-shaped blocks, the upper reinforcing bar 02 exerts an upward pulling force on the wedge-shaped blocks. The wedge-shaped constraints of the locking sleeve decompose the axial tension into horizontal expansion force and axial tension. The circumferential tension of the locking sleeve is transferred to the concrete, while the horizontal expansion force is released by the locking sleeve itself. Therefore, the implementation of this threaded steel connector has excellent reliability.

[0026] This invention enables rapid mechanical connection of main reinforcing bars through the combined use of locking sleeves and wedge blocks. This connection process eliminates the need for threading the main reinforcing bars, saving threading costs. Furthermore, it eliminates the need for threaded connections during use, improving construction efficiency and reducing connection difficulty.

[0027] The wedge fit 03 between the locking sleeve and the wedge block, and the pointed protrusion engagement 04 between the wedge block and the main reinforcing bar in this invention significantly improve the axial anti-slip performance of the connector.

[0028] In this utility model, the threaded steel connector forms an enlarged structure at the connection point of the upper and lower steel bars, which has stronger shear resistance, thereby improving the resistance to transverse shear force between the upper and lower steel bars and thus improving the connection strength.

[0029] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Without departing from the spirit of the present utility model, all modifications and improvements to the present utility model by those skilled in the art should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A threaded steel connector, comprising a locking sleeve, a wedge block, and a retaining spring, characterized in that, The inner surface of the wedge block has a pointed protrusion, and the outer surface is an arc-shaped wedge surface with a wedge shape. Multiple wedge blocks are enclosed to form a structure that clamps the reinforcing bar. The outer surface of the multiple wedge blocks is a conical structure that is smaller at the top and larger at the bottom. This conical structure is wedge-shaped and fits into the conical inner cavity of the locking sleeve. The locking sleeve is sleeved on the outside of the conical structure. Multiple wedge blocks are enclosed to form a retaining spring mounting groove, and the retaining spring is installed in the retaining spring mounting groove.

2. The threaded steel connector according to claim 1, characterized in that, The height of the pointed protrusion is between 0.5 and 2 millimeters.

3. The threaded steel connector of claim 1, wherein, The wedge-shaped block is made of cast iron.

4. The threaded steel connector of claim 1, wherein, The locking sleeve is made of ordinary carbon steel.

5. The threaded steel connector of claim 1, wherein, The retaining ring is an open retaining ring.

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