Butt joint positioning device for reinforcement cage

Abstract

The utility model belongs to the field of reinforcement cage construction, and particularly relates to a reinforcement cage butt joint positioning device which comprises an upper positioning circular ring and a lower positioning circular ring which are identical, a plurality of arc-shaped protruding blocks are evenly arranged on the circumference of the inner wall of each positioning circular ring, and the distance between the arc-shaped protruding blocks is the distance between vertical main reinforcements of a reinforcement cage. The two semicircular rings are fixed together through a bolt A; the width of the positioning ring is equal to the thickness of the steel bar protection layer; a plurality of telescopic rods are connected between the upper and lower positioning rings; and magic tape ribbons are fixed at the upper parts and the lower parts of the telescopic rods. The device can be used for butt joint positioning of pier column steel bars with different lengths, has the function of controlling a steel bar protection layer and meets the requirement for steel bar construction precision.

Description

Technical Field

[0001] This utility model belongs to the field of steel cage construction, and in particular relates to a steel cage docking and positioning device. Background Technology

[0002] Circular support columns are crucial components in building construction, bearing significant loads. The reinforcing cage within the column is a vital element ensuring strength and stability. However, aligning the lap joints of the reinforcing bars during the construction of circular column reinforcing cages is challenging, as is accurately positioning the upper and lower vertical reinforcing bars, leading to difficulties in ensuring the quality of the cage connection. Furthermore, controlling the thickness of the concrete cover for the tall vertical circular columns is also difficult; traditional methods using spacers are prone to deformation and result in large errors in the cover thickness. Summary of the Invention

[0003] The problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a rebar cage docking and positioning device.

[0004] This invention is achieved through the following technical solution:

[0005] A rebar cage docking and positioning device includes two identical positioning rings, one above the other. Several arc-shaped protrusions are evenly distributed around the inner wall of each positioning ring, with the spacing between the arc-shaped protrusions equal to the spacing between the vertical main bars of the rebar cage. Each positioning ring comprises two semi-circular rings, each with a circular hole at its end. The two semi-circular rings are fixed together by bolts A passing through the circular holes. The width of the positioning ring is equal to the thickness of the rebar protective layer. Several telescopic rods connect the upper and lower positioning rings, with Velcro straps fixed to the upper and lower parts of each telescopic rod.

[0006] Preferably, the telescopic rod includes an upper rod and a lower rod. The upper end of the upper rod is threadedly connected to the lower surface of the upper positioning ring, and the lower end of the lower rod is threadedly connected to the upper surface of the lower positioning ring. The lower rod is a hollow rod, and the upper rod can slide up and down inside the lower rod. Several adjustment holes are provided on the upper rod from top to bottom, and a fixing hole is provided on the lower rod. The upper rod and the lower rod are fixed together by bolts B passing through the adjustment holes and the fixing holes.

[0007] Preferably, the arc-shaped protrusion is a semi-circular protrusion.

[0008] Preferably, four telescopic rods are connected between the upper and lower positioning rings.

[0009] The device of this invention has an adjustable length and can be used for positioning at different docking lengths. At the same time, the device of this invention has the function of controlling the protective layer of the reinforcing bars, which meets the requirements of the construction accuracy of the reinforcing cage. It is simple to manufacture, low in cost, easy to install, and simple to operate, making it suitable for widespread promotion. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0011] Figure 2 This is a schematic diagram of the positioning ring structure in this embodiment;

[0012] Figure 3 This is a partial structural diagram of the positioning ring at the bottom in this embodiment.

[0013] In the diagram, 1 is the positioning ring, 2 is the arc-shaped protrusion, 3 is the round hole, 4 is the bolt A, 5 is the Velcro strap, 6 is the upper rod, 7 is the lower rod, 8 is the adjustment hole, 9 is the fixing hole, and 10 is the bolt B. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0015] This embodiment includes two identical positioning rings 1, which are used to position the vertical main reinforcement bars of the steel cage. Several arc-shaped protrusions 2 are evenly distributed around the inner wall of the positioning rings 1. In this embodiment, the arc-shaped protrusions 2 are semi-circular protrusions. The spacing between the arc-shaped protrusions 2 is the designed spacing between the vertical main reinforcement bars of the steel cage. The vertical main reinforcement bars are inserted between adjacent arc-shaped protrusions 2, thereby positioning the vertical main reinforcement bars and effectively controlling the spacing between them. The width of the positioning rings 1 is equal to the thickness of the steel reinforcement protective layer, thus allowing for precise control of the steel reinforcement protective layer thickness, replacing traditional spacers.

[0016] When the diameter of the cylindrical steel reinforcement cage is large, it is difficult to fit a standard one-piece positioning ring 1 onto the cage. Therefore, this embodiment designs a split positioning ring 1, which consists of two semi-circular rings. Each semi-circular ring has a corresponding circular hole 3 at both ends. After aligning the circular holes 3 of the two semi-circular rings vertically, the two semi-circular rings can be fixed together by bolts A4 passing through the circular holes 3. Several telescopic rods are connected between the upper and lower positioning rings 1. In this embodiment, four telescopic rods are connected between the upper and lower positioning rings 1. The telescopic rods can extend and retract vertically to change their length, adapting to different docking length controls. In this embodiment, a detachable telescopic rod is selected. Specifically, the telescopic rod includes an upper rod 6 and a lower rod 7, which can be sleeved together. The lower rod 7 is a hollow rod, and the upper rod 6 can slide up and down inside the lower rod 7. Threaded holes are provided on the lower surface of the upper positioning ring 1 and the upper surface of the lower positioning ring 1. The upper rod 6 or the lower rod 7 is connected through the threaded holes. The upper end of the upper rod 6 is threadedly connected to the lower surface of the upper positioning ring 1, and the lower end of the lower rod 7 is threadedly connected to the upper surface of the lower positioning ring 1. Thus, both the upper rod 6 and the lower rod 7 are detachable. Several adjusting holes 8 are provided on the upper rod 6 from top to bottom, and fixing holes 9 are provided on the lower rod 7. The total length of the upper rod 6 and the lower rod 7 is adjusted through the adjusting holes 8 and the fixing holes 9. The upper rod 6 and the lower rod 7 are fixed together by bolts B10 passing through the adjusting holes 8 and the fixing holes 9.

[0017] To ensure that the upper and lower positioning rings 1 are more securely fastened to the steel cage, it is preferable to fix Velcro straps 5 at both the upper and lower parts of the telescopic rod. The Velcro straps 5 can be used to tie the telescopic rod to the vertical main reinforcement, preventing the upper and lower positioning rings 1 from slipping during the docking process.

[0018] During construction, the lower positioning ring 1 can be used to assist in tying the reinforcing cage and positioning the vertical main bars. When a butt joint is required, first place the lower positioning ring 1 on the upper part of the reinforcing cage without the ring hoop. Use one of the semi-circular rings to hold the vertical main bars in sequence, with the vertical main bars inserted between the adjacent arc-shaped protrusions 2. Then, close and fix the two semi-circular rings together. Insert the other part of the vertical main bars between the adjacent arc-shaped protrusions 2. Then, screw the upper and lower rods 7 onto the lower positioning ring 1, insert the upper rod 6 into the lower rod 7, and adjust the total length so that the upper rod 6 reaches the position of the upper butt joint, preferably extending upwards beyond the upper part. Connect the bottom 20-30cm of the main reinforcement bar, then thread the upper rod 6 to the upper positioning ring 1, and then fix the upper rod 6 to the lower rod 7. Close and fix the two halves of the upper positioning ring 1 together. Use the Velcro strap 5 of the lower rod 7 to tie the lower rod 7 to the lower vertical main reinforcement bar. Then start the connection of the vertical main reinforcement bars. The vertical main reinforcement bars that are connected downwards are inserted into the adjacent arc-shaped protrusions 2 in sequence to connect with the lower vertical main reinforcement bars. During the process, the upper Velcro strap 5 can be used to tie the upper rod 6 to the vertical main reinforcement bars. After the vertical main reinforcement bars are connected, tie the other vertical bars and ring bars to complete the connection. Before pouring concrete, put the circular outer formwork over the reinforcement cage so that the inner surface of the outer formwork is in close contact with the outer surface of the positioning ring 1. This can effectively control the thickness of the reinforcement protective layer. During concrete pouring, the device of this invention can be removed or not removed and poured together with the concrete.

[0019] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; those skilled in the art should understand that modifications can still be made to the technical solutions described in the above embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A rebar cage docking and positioning device, characterized in that: It includes two identical positioning rings (1) on the top and bottom. Several arc-shaped protrusions (2) are evenly arranged around the inner wall of the positioning ring (1). The spacing between the arc-shaped protrusions (2) is the spacing between the vertical main bars of the steel cage. The positioning ring (1) includes two semi-circular rings. The ends of the two semi-circular rings are provided with circular holes (3). The two semi-circular rings are fixed together by bolts A (4) passing through the circular holes (3). The width of the positioning ring (1) is equal to the thickness of the steel reinforcement protective layer. Several telescopic rods are connected between the upper and lower positioning rings (1). The upper and lower parts of the telescopic rods are fixed with Velcro straps (5).

2. The rebar cage docking and positioning device according to claim 1, characterized in that: The telescopic rod includes an upper rod (6) and a lower rod (7). The upper end of the upper rod (6) is threadedly connected to the lower surface of the upper positioning ring, and the lower end of the lower rod (7) is threadedly connected to the upper surface of the lower positioning ring. The lower rod (7) is a hollow rod, and the upper rod (6) can slide up and down inside the lower rod (7). Several adjustment holes (8) are provided on the upper rod (6) from top to bottom, and a fixing hole (9) is provided on the lower rod (7). The upper rod (6) and the lower rod (7) are fixed together by bolts B (10) passing through the adjustment holes (8) and the fixing holes (9).

3. The rebar cage docking and positioning device according to claim 2, characterized in that: The arc-shaped protrusion (2) is a semi-circular protrusion.

4. The rebar cage docking and positioning device according to claim 2, characterized in that: Four telescopic rods are connected between the upper and lower positioning rings (1).

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