Steel bar mechanical anchoring structure

Abstract

The utility model relates to a reinforcing steel bar mechanical anchoring structure which comprises a reinforcing steel bar, a sleeve, an anchor plate and a bolt. The inner wall of the sleeve is provided with an internal thread matched with the thread; external threads matched with the internal threads are arranged at the tail end of the reinforcing steel bar, and the tail end of the reinforcing steel bar is in threaded connection with the first end of the sleeve; the anchor plate is provided with a bolt through hole, the bolt penetrates through the bolt through hole in the anchor plate to be in threaded connection with the second end of the sleeve, and the bolt presses and fixes the anchor plate to the second end of the sleeve. According to the reinforcing steel bar mechanical anchoring structure, the tail end of the reinforcing steel bar is connected with the sleeve in a threaded mode, the anchor plate is pressed and fixed to the sleeve through the common bolt, and therefore the reinforcing steel bar mechanical anchoring structure is formed, and the reinforcing steel bar, the sleeve and the anchor plate can be manufactured in batches in a machining factory. And during field assembly, mounting can be quickly completed only by screwing a bolt through an electric torque wrench, convenience and rapidness are achieved, and the manual construction cost can be saved.

Description

Technical Field

[0001] The utility model relates to the technical field of civil engineering, and more specifically, to a steel bar mechanical anchoring structure. Background Art

[0002] According to the G101 series of drawings of "Drawing Rules and Structural Details of Plane Overall Representation Methods of Concrete Structure Construction Drawings", there are three main commonly used mechanical anchoring forms for the ends of steel bars: 1. Welded anchor bars at the ends of steel bars (on one side or both sides); 2. Through-hole plug welding between the ends of steel bars and steel plates; 3. Bolt anchor heads at the ends of steel bars. Among them, the first two types of mechanical anchoring structures for the ends of steel bars require a lot of welding work at the construction site, which is time-consuming, labor-intensive, and difficult to control the quality of on-site welding; while the latter type of mechanical anchoring structure for the ends of steel bars using bolt anchor heads requires customized bolts that meet the cross-sectional area requirements (i.e., the bearing area of ​​the bolt anchor head should not be less than 4 times the cross-sectional area of ​​the anchored steel bar). Common bolts on the market cannot meet the requirement that the bearing area of ​​the bolt anchor head is greater than 4 times the cross-sectional area of ​​the steel bar, and special bolts need to be customized and purchased. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide a steel bar mechanical anchoring structure, aiming to solve the problems existing in the prior art.

[0004] According to the utility model, a steel bar mechanical anchoring structure is provided, which comprises: a steel bar, a sleeve, an anchor plate and a bolt; wherein:

[0005] The inner wall of the sleeve is provided with an internal thread matching the bolt;

[0006] The end of the steel bar is provided with an external thread matching the internal thread, and the end of the steel bar is threadedly connected to the first end of the sleeve;

[0007] The anchor plate is provided with a bolt through hole, and the bolt passes through the bolt through hole on the anchor plate and is threadedly connected to the second end of the sleeve, and the bolt presses and fixes the anchor plate to the second end of the sleeve.

[0008] Preferably, the anchor plate is made of a steel plate, and the thickness of the anchor plate is greater than or equal to the diameter of the steel bar.

[0009] Preferably, the anchor plate is a square plate.

[0010] Preferably, the bolt through hole is located at the center of the anchor plate.

[0011] Preferably, the area of ​​the anchor plate is greater than or equal to 5 times the cross-sectional area of ​​the steel bar.

[0012] Preferably, the bolt is a full-thread bolt, and the difference between the length of the screw rod of the bolt and the thickness of the anchor plate is equal to half the length of the sleeve.

[0013] Preferably, the length of the external thread at the end of the steel bar is greater than or equal to half the length of the sleeve.

[0014] Preferably, the bolt is a hexagonal head bolt.

[0015] Preferably, the sleeve is made of a seamless steel pipe.

[0016] Preferably, the external thread at the end of the steel bar is formed by rolling with a thread rolling machine.

[0017] The utility model provides a mechanical anchoring structure for steel bars, which is formed by applying a threaded connection to the end of the steel bar, and then pressing and fixing the anchor plate on the sleeve with ordinary bolts. The steel bars, sleeves and anchor plates can be mass-produced in a machining plant, and during on-site assembly, the installation can be quickly completed by tightening the bolts with an electric torque wrench, which is convenient and fast and can save labor construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings.

[0019] Figure 1 A structural schematic diagram of a steel bar mechanical anchoring structure according to an embodiment of the utility model is shown.

[0020] Figure 2 A schematic structural diagram of an anchor plate in a reinforcement mechanical anchoring structure according to an embodiment of the utility model is shown.

[0021] In the figure: 1, steel bar; 11, external thread; 2, sleeve; 3, anchor plate; 31, bolt through hole; 4, bolt; 41, screw rod. DETAILED DESCRIPTION

[0022] Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. In each of the accompanying drawings, the same elements are represented by the same or similar reference numerals. For the sake of clarity, the various parts in the accompanying drawings are not drawn to scale.

[0023] The utility model provides a steel bar mechanical anchoring structure, see Figure 1The steel bar mechanical anchoring structure includes: a steel bar 1, a sleeve 2, an anchor plate 3 and a bolt 4; wherein, the inner wall of the sleeve 2 is provided with an internal thread matching the bolt 4; the end of the steel bar 1 is provided with an external thread 11 matching the internal thread, and the end of the steel bar 1 is threadedly connected to the first end of the sleeve 2; a bolt through hole 31 is provided on the anchor plate 3, and the bolt 4 passes through the bolt through hole 31 on the anchor plate 3 and is threadedly connected to the second end of the sleeve 2, and the bolt 4 presses and fixes the anchor plate 3 to the second end of the sleeve 2.

[0024] Specifically, the steel bar 1, sleeve 2, and anchor plate 3 can all be mass-produced and manufactured in a machining plant, and the bolt 4 can be directly purchased from a commonly used ordinary standard bolt 4. In specific implementation, the external thread 11 at the end of the steel bar 1 is formed by rolling with a thread rolling machine. Compared with manual thread rolling with a die and thread turning with a machine tool, the external thread 11 at the end of the steel bar 1 processed by a thread rolling machine has higher strength and higher production efficiency due to the use of rolling processing, which is suitable for mass production. The anchor plate 3 is made of steel plate, and the thickness of the anchor plate 3 is greater than or equal to the diameter of the steel bar 1, see Figure 2 , the anchor plate 3 is a square plate, and the bolt through hole 31 is located at the center of the anchor plate 3. Designing the anchor plate 3 as a square plate can improve the utilization rate of the steel plate material during processing and manufacturing, and facilitate the clamping of the anchor plate 3 to facilitate the processing of the bolt through hole 31 on the anchor plate 3. In specific implementation, the anchor plate 3 can first be made into a square plate by laser cutting or shearing, and then the bolt through hole 31 at the center of the anchor plate 3 is processed on a drilling machine. The diameter of the bolt through hole 31 is larger than the diameter of the screw 41 of the bolt 4 by 1~2mm, so as to facilitate the bolt 4 to pass through the bolt through hole 31. The sleeve 2 is made of seamless steel pipe. In specific production, a seamless steel pipe with a suitable inner diameter is selected, a certain length is cut, and then the internal thread on the inner wall of the sleeve 2 is processed on the machine tool.

[0025] According to the structural requirements of mechanical anchoring of the end of the steel bar, when using an anchoring method with a bolt anchor head, the pressure bearing area of ​​the bolt anchor head should not be less than 4 times the cross-sectional area of ​​the anchored steel bar. In this embodiment, a bolt through hole 31 is opened at the center of the anchor plate 3, and the bolt through hole 31 is used to pass the screw 41 of the bolt 4 with the same diameter as the steel bar 1. In order to ensure that the anchor plate 3 meets the prescribed standards in terms of pressure bearing capacity and ensure the stability and safety of the structure, the area of ​​the anchor plate 3 is not less than 5 times the cross-sectional area of ​​the steel bar 1.

[0026] In order to make the steel bar 1 and the bolt 4 have a sufficient length of threaded connection with the sleeve 2 to improve the reliability after assembly and connection, the screw rod 41 of the bolt 4 and the external thread 11 at the end of the steel bar 1 are screwed into the sleeve 2 by half of the length. Preferably, the bolt 4 is a full-thread bolt, and the difference between the length of the screw rod 41 of the bolt 4 and the thickness of the anchor plate 3 is equal to half of the length of the sleeve 2; the length of the external thread 11 at the end of the steel bar 1 is greater than or equal to half of the length of the sleeve 2. When the steel bar mechanical anchoring structure is installed, the screw rod 41 of the bolt 4 is first screwed into the sleeve 2, so that the bolt head of the bolt 4 presses and fixes the anchor plate 3 on the second end of the sleeve 2, and then the bolt 4 is screwed. Since the screw rod 41 of the bolt 4 cannot be screwed into the sleeve 2, the sleeve 2 will be driven to rotate when the bolt 4 is screwed, so that the external thread 11 at the end of the steel bar 1 is screwed into the sleeve 2 until the end of the steel bar 1 abuts against the screw rod 41 of the bolt 4 and cannot be screwed in further, and the installation of the steel bar mechanical anchoring structure is completed.

[0027] In this embodiment, the bolt 4 is a hexagonal head bolt, and the full-threaded hexagonal head bolt required by the GB / T5783-2016 standard can be directly purchased. When screwing the bolt 4, a hexagonal socket 2 matching the hexagonal head bolt is connected to the output end of the electric torque wrench to tighten the bolt 4.

[0028] The specific assembly operation of the steel bar mechanical anchoring structure is as follows: first, screw the first end of the sleeve 2 into the external thread 11 at the end of the steel bar 1 for two turns, then pass the bolt 4 through the bolt through hole 31 on the anchor plate 3, and screw the screw 41 of the bolt 4 into the second end of the sleeve 2 for two turns. Use an electric torque wrench to clamp the hexagonal bolt head of the bolt 4 and tighten it until the bolt 4 and the end of the steel bar 1 are both screwed into the sleeve 2 and cannot be screwed further, thus completing the installation of the steel bar mechanical anchoring structure.

[0029] In summary, the steel bar mechanical anchoring structure provided by the utility model is applied by threading at the end of the steel bar, and then the anchor plate is pressed and fixed on the sleeve by ordinary bolts, so as to form a steel bar mechanical anchoring structure. The steel bars, sleeves and anchor plates can be mass-produced in a machining plant. During on-site assembly, the installation can be quickly completed by screwing the bolts with an electric torque wrench, which is convenient and fast, and can save labor construction costs. Compared with the existing steel bar mechanical anchoring structure, the steel bar mechanical anchoring structure provided by the utility model does not require welding at the construction site, saving labor. The processing of each component is completed in the machining plant, the quality is easy to control, and there is no need to customize and purchase special bolts, which is convenient to obtain materials.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0031] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A steel bar mechanical anchoring structure, characterized in that: include: Steel bars, sleeves, anchor plates and bolts; of which, The inner wall of the sleeve is provided with an internal thread matching the bolt; The end of the steel bar is provided with an external thread matching the internal thread, and the end of the steel bar is threadedly connected to the first end of the sleeve; The anchor plate is provided with a bolt through hole, and the bolt passes through the bolt through hole on the anchor plate and is threadedly connected to the second end of the sleeve, and the bolt presses and fixes the anchor plate to the second end of the sleeve.

2. The steel bar mechanical anchoring structure according to claim 1, characterized in that: The anchor plate is made of a steel plate, and the thickness of the anchor plate is greater than or equal to the diameter of the steel bar.

3. The steel bar mechanical anchoring structure according to claim 1, characterized in that: The anchor plate is a square plate.

4. The steel bar mechanical anchoring structure according to claim 1, characterized in that: The bolt through hole is located at the center of the anchor plate.

5. The steel bar mechanical anchoring structure according to claim 1, characterized in that: The area of ​​the anchor plate is greater than or equal to 5 times the cross-sectional area of ​​the steel bar.

6. The steel bar mechanical anchoring structure according to claim 1, characterized in that: The bolt is a full-thread bolt, and the difference between the length of the screw rod of the bolt and the thickness of the anchor plate is equal to half the length of the sleeve.

7. The steel bar mechanical anchoring structure according to claim 6, characterized in that: The length of the external thread at the end of the steel bar is greater than or equal to half the length of the sleeve.

8. The steel bar mechanical anchoring structure according to claim 1, characterized in that: The bolts are hexagonal head bolts.

9. The steel bar mechanical anchoring structure according to claim 1, characterized in that: The sleeve is made of a seamless steel pipe.

10. The steel bar mechanical anchoring structure according to claim 1, characterized in that: The external thread at the end of the steel bar is formed by rolling with a thread rolling machine.

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