Precise positioning device for main reinforcement of foundation pile reinforcement cage

Abstract

The utility model discloses a foundation pile reinforcement cage main reinforcement accurate positioning device which comprises a rotating shaft sleeve, an annular T-shaped groove is formed in the circumferential surface of the rotating shaft sleeve, T-shaped blocks are arranged in the T-shaped groove at intervals along the circumference, the T-shaped blocks and the T-shaped groove are in clearance fit, the T-shaped blocks can move in the T-shaped groove, the outer end of a stand column of each T-shaped block is a threaded section, and the outer end of the stand column of each T-shaped block is a threaded section. A locking nut is screwed on the threaded section, the outer end of the stand column of each T-shaped block is connected with the inner end of a telescopic rod, and a steel bar fixing device is arranged at the outer end of each telescopic rod. According to the utility model, the spacing of the main reinforcements can be accurately positioned, so that the ends of the main reinforcements are on the same section, the spacing of the main reinforcements of each section of the reinforcement cage is uniform, the reinforcement cage can be smoothly connected during straight thread connection, and the ends of the main reinforcements are completely aligned in the sleeve; and the problem of secondary processing of the screw head on a construction site due to irregular end heads is avoided, the construction quality is effectively improved, and the construction speed is increased.

Description

Technical Field

[0001] This utility model relates to a welding technology for foundation pile reinforcement cages, and in particular to a device for precise positioning of the main reinforcement bars of foundation pile reinforcement cages. Background Technology

[0002] Currently, the main connection methods for reinforcing cages in pile foundation construction are: 1. welding, 2. cold extrusion sleeve connection, and 3. straight thread connection. Compared with welding and cold extrusion sleeve connections, straight thread connections have the advantages of strong connection, convenient construction, and lower cost than cold extrusion sleeve connections, making them the best choice for pile foundation reinforcing cage connection construction.

[0003] However, in actual construction, two problems directly affect the quality of straight thread connections:

[0004] 1. During the production of the pile foundation reinforcement cage, the diameter of the positioning steel pipe on the reinforcement cage welding machine differs from the diameter of the main reinforcement by approximately 12mm. As the welding machine rotates, the main reinforcement moves within the positioning steel pipe due to gravity, with the main reinforcement positioned at the bottom of the pipe. The spot welding of the same reinforcement bar cannot guarantee that every spot weld is at the same horizontal height. This results in slight deviations in the position of each main reinforcement bar during the reinforcement cage processing, with the largest deviations at the ends. Consequently, the central axes of the reinforcement bars at both ends of the same section of the reinforcement cage are not aligned.

[0005] 2. During the connection process of different segments of the reinforcing cage for the same foundation pile, slight errors in the spacing of the main reinforcement bars between upper and lower segments can easily occur. This can prevent proper connection during threading and sleeve installation. Often, a grinder is needed to polish the threads before butt jointing; alternatively, an electric wrench is used to apply external force to slightly alter the position and direction of the reinforcing bar ends to achieve alignment and connection. These measures directly impact the quality of the reinforcing cage construction, increase the difficulty of construction for workers, reduce the installation speed of the reinforcing cage, and further affect the progress of the foundation pile construction.

[0006] Authorization announcement number CN 221019431 U discloses an auxiliary feeding device for a rebar cage welding machine, including a positioning mechanism and a feeding mechanism that cooperate with each other. The positioning mechanism includes a positioning frame and a positioning rotary cylinder. Multiple arc-shaped plates are arranged inside the positioning frame. The positioning rotary cylinder is coaxially arranged with the arc-shaped plates and has multiple sets of spacer rods along its axial direction. A positioning wheel is provided at every other end of the spacer rod, and the positioning wheel is connected to the inner side of the arc-shaped plate. This utility model positions the main reinforcing bars of the rebar cage in a circular shape through the positioning mechanism, and then, driven by the driving mechanism, pulls the main reinforcing bars into the feeding mechanism for welding. This effectively avoids rebar misalignment caused by the large diameter of the rebar cage and improves the production efficiency of the rebar cage.

[0007] However, in this patent, one end of each spacer is fixedly connected to the positioning rotating cylinder. Therefore, its position is fixed and cannot be adjusted. When the spacing of the reinforcing bars changes, the positioning rotating cylinder can only be replaced, which is costly, laborious, and time-consuming. Utility Model Content

[0008] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a well-designed, adjustable and easy-to-operate device for precise positioning of the main reinforcement bars of a foundation pile steel cage.

[0009] The technical solution of this utility model is:

[0010] A precise positioning device for the main reinforcement bars of a foundation pile steel cage includes a rotating bushing. An annular T-groove is provided on the circumferential surface of the rotating bushing. T-blocks are arranged at intervals along the circumference in the T-groove, and the two are fitted with a clearance fit. The T-blocks can move in the T-groove. The outer end of the column of each T-block is a threaded section, and a locking nut is screwed onto the threaded section. The outer end of the column of each T-block is connected to the inner end of a telescopic rod, and the outer end of each telescopic rod is provided with a steel bar fixer.

[0011] Furthermore: the telescopic rod and the column are connected by a thread, allowing for disassembly and assembly; the rotating bushing is fitted onto the rotating shaft, and the two are connected by a spline or a flat key, or the rotating bushing is fitted onto the rotating shaft, and the two are connected by a top-pressing screw that passes through the rotating bushing.

[0012] Furthermore: the rebar fixer is an elastic clamp that can clamp the rebar, or the rebar fixer is a magnet that can attract the rebar, or the rebar fixer is a hook that can hook the rebar.

[0013] The beneficial effects of this utility model are:

[0014] 1. This utility model can be equipped with multiple telescopic rods along the circumference on a rotating bushing, which facilitates the adjustment of the spacing between adjacent steel bars. Furthermore, the extension length can be adjusted using telescopic rods to make it suitable for welding steel cages of different diameters, thus having a wide range of applications.

[0015] 2. This utility model adopts a structure of T-slot and T-block, which makes it easy for the T-block to be placed into the T-slot and to be positioned, and allows for quick assembly and disassembly when adding or removing T-blocks.

[0016] 3. This utility model uses a locking nut, which can fix the T-block in place, thereby ensuring the precise position of the reinforcing bar. At the same time, the locking nut can be loosened to move the position, making it easy to operate.

[0017] 4. The inner end of the telescopic rod of this utility model is fixedly connected to the T-block or threadedly connected. When the threaded connection is used, the inner end of the telescopic rod is provided with a threaded section to meet the use of the locking nut, thereby reducing the manufacturing cost.

[0018] 5. This utility model has a reasonable design, can be adjusted in position and is easy to operate, easy to promote and implement, and has good economic benefits. Attached Figure Description

[0019] Figure 1 A schematic diagram of a device for precisely positioning the main reinforcement bars of a foundation pile steel cage;

[0020] Figure 2 for Figure 1 The axial sectional view of the rotating bushing shown;

[0021] Figure 3 for Figure 1 The diagram shows the structure of the moving block and the telescopic rod. Detailed Implementation

[0022] Example 1: See Figure 1 -- Figure 3 In the figure, 1-rotating bushing, 2-T-slot, 3-T-block, 4-locking nut, 5-telescopic rod, 6-rebar fixer.

[0023] A precise positioning device for the main reinforcement of a foundation pile steel cage includes a rotating bushing 1. The rotating bushing 1 has an annular T-groove 2 on its circumferential surface. T-blocks 3 are spaced apart along the circumference of the T-groove 2, with a clearance fit between them. The T-blocks 3 can move within the T-groove 2. Specifically, the width of the T-block 3 is less than its length. The width allows the T-block 3 to fit into the T-groove 2, while the length allows it to be secured within the T-groove 2. The outer end of the column of the T-block 3 is a threaded section, on which a locking nut 4 is screwed. The outer end of the column of each T-block 3 is connected to the inner end of a telescopic rod 5, and the outer end of each telescopic rod 5 is equipped with a reinforcement fixing device 6.

[0024] The telescopic rod 5 can adopt a pull-out antenna structure, with each segment tightly fitted in sequence and equipped with node limits, so that it can extend and retract without being pulled off.

[0025] Alternatively, the telescopic rod 5 adopts a pipe fitting structure with adjacent pipe fittings in a gap fit, allowing it to extend and retract, and is fixed by a set screw that penetrates the pipe wall.

[0026] Alternatively, the telescopic rod 5 adopts a rod-joint structure, with adjacent pipes connected by threads or snaps, allowing it to be lengthened and shortened.

[0027] Preferred solution: The telescopic rod 5 is connected to the column by a thread, which can be disassembled and assembled; the rotating bushing 1 is fitted on the rotating shaft, and the two are connected by a spline or a flat key (the figure shows a spline structure; if a flat key connection is used, at least two keyways are provided along the circumference to accommodate the flat key).

[0028] Preferred options: The rebar fastener 5 is an elastic clip (which can be an inwardly curved spring or a scissor clamp) that can clamp the rebar; or the rebar fastener is a magnet (which can be a magnet or a semi-circular ring with a magnet on it) that can attract the rebar; or the rebar fastener is a hook that can hook the rebar.

[0029] In use, first, the rotating bushing 1 is fitted onto the rotating shaft and can rotate with the rotating shaft. Then, according to the number of axial main bars in the steel cage, the same number of T-blocks 3 are placed into the T-slots 2 along the circumference and fixed with locking nuts 4, so that each telescopic rod 5 corresponds to one axial main bar. Next, the length of the telescopic rod 5 is adjusted according to the diameter of the steel cage. Finally, the axial main bars are placed on the corresponding steel bar fixing devices 6 to form a uniform distribution along the circumference. The ends of all the axial main bars are aligned and can be welded and fixed to the end plate or the end radial steel bars. Then, the radial steel bars at different positions are welded in sequence to form an integral steel cage.

[0030] T-block 3 can be made into a standard part, making it easy to add or replace at any time.

[0031] Example 2: This example is basically the same as Example 1, and the similarities will not be repeated. The difference is that the rotating bushing is fitted on the rotating shaft, and the two are connected by a top-pressing screw that passes through the rotating bushing.

[0032] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications made based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A device for accurately positioning a main reinforcement of a pile cage, comprising a rotating shaft sleeve, characterized in that: The circumferential surface of the rotating shaft sleeve is provided with an annular T-shaped groove, and T-shaped blocks are arranged in the T-shaped groove at intervals along the circumference and are in clearance fit, the T-shaped blocks can move in the T-shaped groove, the outer end of the column of the T-shaped block is a threaded segment, a lock nut is screwed on the threaded segment, the outer end of the column of each T-shaped block is connected with the inner end of an expansion rod, and the outer end of each expansion rod is provided with a reinforcing bar fixer. ​ 2. The precision positioning device for the main reinforcement of a pile cage according to claim 1, characterized in that: The expansion rod and the column are connected by threads and can be disassembled, the rotating shaft sleeve is sleeved on the rotating shaft, and the two are connected by splines or flat keys, or the rotating shaft sleeve is sleeved on the rotating shaft, and the two are connected by penetrating top pressure screws.

3. The precision positioning device for the main reinforcement of a pile cage according to claim 1, characterized in that: The reinforcing bar fixer is an elastic clamp capable of clamping a reinforcing bar, or the reinforcing bar fixer is a magnet capable of attracting a reinforcing bar, or the reinforcing bar fixer is a hook capable of hooking a reinforcing bar.

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