Novel anti-bending and anti-torsion cement wire pole

Abstract

The utility model discloses a novel anti-bending and anti-torsion cement wire pole which comprises a reinforcement cage and a cement filling body which is poured and wrapped on the reinforcement cage, the reinforcement cage is of a three-layer spiral reinforcement composite structure and comprises a middle connecting framework, a first composite spiral body is fixed on the inner side of the middle connecting framework, and a second composite spiral body is fixed on the outer side of the middle connecting framework. The first composite spiral body and the second composite spiral body are both formed by spirally winding a plurality of steel bars, the inner-layer steel bars and the outer-layer steel bars are evenly distributed, the corresponding steel bars are coaxially and synchronously wound, and the rotating directions of the steel bars of the first composite spiral body and the second composite spiral body are the same and are opposite to the rotating directions of the steel bars of the middle connecting framework. The utility model solves the problems of insufficient bending resistance and torsion resistance of the existing telegraph pole, complex construction process of a steel reinforcement framework and long processing time.

Description

Technical Field

[0001] This utility model relates to the field of power transmission, specifically to a cement pole with bending and torsion resistance. Background Technology

[0002] Traditional concrete poles consist only of vertical steel bars and cement, with no lap joints between the longitudinal bars, relying solely on cement bonding. This results in a low section modulus of bending, making them prone to bending and breakage under unilateral stress. Balance is maintained by symmetrical cable routing or additional reinforcement (such as ground anchors or guy wires). Furthermore, traditional concrete poles have poor torsional resistance. When the cables on both sides are not aligned or when the cables collide, the lack of a torque-balancing structure causes the concrete pole to tilt and become unstable. In severe cases, the torque is transmitted through the pole, triggering a chain reaction of adjacent poles toppling, ultimately leading to regional power outages.

[0003] Utility model patent CN217924438U discloses a steel reinforcement cage for a partially prestressed concrete communication tower, comprising prestressed steel bars, several support rings, and spiral reinforcement. The prestressed steel bars are arranged circumferentially to form a cylindrical shape, and the support rings are arranged along the length of the prestressed steel bars and located inside the prestressed steel bars. The support rings are fixedly installed to the prestressed steel bars to support them and prevent deformation of the steel reinforcement cage. The spiral reinforcement is fixed to the outside of the prestressed steel bars and spirally wound along their length to enhance the bending and torsional resistance of the steel reinforcement cage. However, this patent also has shortcomings: relying solely on spiral reinforcement wound around the outside of the prestressed steel bars along their length to enhance the bending and torsional resistance of the steel reinforcement cage is clearly insufficient. Moreover, the support rings and spiral reinforcement need to be installed in stages during installation, resulting in complex construction procedures and long processing time. Utility Model Content

[0004] This utility model proposes a new type of bending and torsion resistant cement pole, the purpose of which is to solve the problem of insufficient bending and torsion resistance of existing poles, as well as the problem of complex construction procedures and long processing time for steel reinforcement cages.

[0005] The technical solution of this utility model is as follows:

[0006] A novel type of bending and torsion resistant cement pole includes a reinforcing cage and a cement filling body cast and wrapped around the reinforcing cage. The reinforcing cage is a three-layer spiral reinforcing steel composite structure, including an intermediate connecting skeleton with a first composite spiral fixed on its inner side and a second composite spiral fixed on its outer side. The intermediate connecting skeleton is a spiral formed by winding a single reinforcing steel bar. The first and second composite spirals are both formed by spirally winding multiple reinforcing steel bars. The inner and outer layers of reinforcing steel bars are evenly distributed and wound coaxially and synchronously. The reinforcing steel bars of the first and second composite spirals have the same spiral direction and are opposite to the spiral direction of the reinforcing steel bars of the intermediate connecting skeleton.

[0007] As a further improvement of this utility model, the first composite spiral and the second composite spiral are welded and fixed to the intermediate connecting skeleton to form a steel cage.

[0008] As a further improvement of this utility model, the intermediate connecting skeleton adopts a gradient pitch design; the pitch gradually increases from the bottom to the top.

[0009] As a further improvement of this utility model, the winding pitch of the intermediate connecting skeleton is 150mm-250mm, and the pitch of the first composite spiral and the second composite spiral are both 800mm-1200mm.

[0010] As a further improvement of this utility model, the intermediate connecting skeleton, the first composite spiral and the second composite spiral are all made of φ8mm-φ12mm cold-drawn round steel.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] (1) This utility model forms a three-layer spiral steel cage by welding the intermediate connecting skeleton with the inner first composite spiral and the outer second composite spiral, thus forming a composite force system. This effectively improves the bending section modulus, and the spatial network structure formed by the three-layer spiral structure also enhances the stability of the overall structure. At the same time, the torsional stiffness is greatly improved by forming a torque balance system through the reverse spiral between the inner and outer spiral steel mesh and the intermediate connecting skeleton.

[0013] (2) This utility model uses cold-drawn round steel with a simple manufacturing process, and construction and maintenance are relatively simple. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a cement pole in one embodiment of the present invention;

[0015] Figure 2 This is a schematic diagram of the steel cage structure in one embodiment of the present invention;

[0016] Figure 3 This is a schematic diagram of the cross-sectional structure of a cement pole in one embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures:

[0018] 1. Cement filling body; 2. Reinforcing cage; 2-1. First composite spiral; 2-2. Intermediate connecting skeleton; 2-3. Second composite spiral. Detailed Implementation

[0019] The technical solution and effects of this utility model will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0020] like Figure 1 A novel type of bending and torsion resistant cement pole includes a reinforcing cage 2 and a cement filling body 1 cast and wrapped around the reinforcing cage 2. The reinforcing cage 2 is a three-layer spiral reinforcing steel composite structure, including an intermediate connecting skeleton 2-2, a first composite spiral 2-1 fixed on its inner side, and a second composite spiral 2-3 fixed on its outer side.

[0021] To provide stable support, the intermediate connecting frame 2-2 is a spiral formed by winding a single steel bar with a pitch of 150mm-250mm. In one embodiment of this invention, the intermediate connecting frame 2-2 is formed by continuously spirally forming a single φ10mm cold-drawn round steel bar with a pitch of 200mm. Furthermore, the intermediate connecting frame 2-2 adopts a gradient pitch design, that is, the bottom uses a denser pitch of 150mm to enhance bending resistance, while the top uses a more sparse pitch of 250mm to reduce the weight at the top. The pitch gradually increases from the bottom to the top.

[0022] Specifically, the first composite spiral 2-1 and the second composite spiral 2-3 each comprise six spirals. To ensure that the winding direction and pitch of the spirals remain consistent, the first composite spiral 2-1 and the second composite spiral 2-3 are wound coaxially and synchronously. The inner and outer layers of reinforcing bars are evenly distributed (with a spatial phase difference of 60° between adjacent reinforcing bars), and their pitch is 1000mm. The first composite spiral 2-1 and the second composite spiral 2-3 are welded and fixed to the lap joints of the reinforcing bars of the intermediate connecting skeleton 2-2 to form a reinforcing cage 2.

[0023] Furthermore, the reinforcing bars of the first composite spiral 2-1 and the second composite spiral 2-3 have the same spiral direction and are opposite to the spiral direction of the reinforcing bars of the intermediate connecting skeleton 2-2. The torque balance system is formed by the reverse spirals between the inner and outer composite spirals and the intermediate connecting skeleton 2-2, which greatly improves the torsional stiffness.

[0024] Preferably, the steel bars used in the first composite spiral 2-1 and the second composite spiral 2-3 are both cold-drawn round steel bars with a diameter of φ10mm.

[0025] The cement filling body 1 is a ring structure with an inner diameter of 300mm, an outer diameter of 400mm, and a height of 6000mm.

[0026] The following example illustrates the method for manufacturing cement poles in this embodiment:

[0027] First, cut six round steel bars of appropriate length and simultaneously wind them around a smooth outer cylinder, starting from the bottom (…). Figure 1The steel cage 2 (left side) spirals counterclockwise upwards to form a first composite spiral 2-1 consisting of six non-contacting spirals. Then, a round steel bar is wound around the outside of the first composite spiral 2-1 as an intermediate connecting frame 2-2, with the winding direction spiraling clockwise upwards from the bottom. Next, six round steel bars of appropriate length are simultaneously wound around the outside of the intermediate connecting frame 2-2 to form a second composite spiral 2-3 consisting of six non-contacting spiral structures, with the winding direction spiraling clockwise upwards from the bottom. The first composite spiral 2-1 and the second composite spiral 2-3 are welded and fixed to the intermediate connecting frame 2-2 at their overlaps. Finally, using hoisting equipment and steel wire rope traction, the fabricated steel cage 2 is unloaded from the cylinder, completing the fabrication of the steel cage 2.

[0028] Place the completed reinforcing cage 2 into the mold and pour concrete. Pour the mixed concrete slurry into the mold, ensuring that the concrete fully fills the interior of the reinforcing cage 2. The filling should be even to avoid creating voids and to form a complete cement pole. After curing, remove the cement pole from the mold and clean the mold to complete the production of the cement pole.

[0029] It should be noted that, as will be apparent to those skilled in the art, this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. The scope of this utility model is defined by the claims rather than the foregoing description.

Claims

1. A new type of bending and torsion resistant cement pole comprising a reinforcement cage (2) and a cement filling (1) cast and wrapped around the reinforcement cage (2), characterized in that: The reinforcing cage (2) is a three-layer spiral reinforcing composite structure, comprising a middle connecting framework (2-2), a first composite spiral body (2-1) fixed inside the middle connecting framework (2-2), and a second composite spiral body (2-3) fixed outside the middle connecting framework (2-2); the middle connecting framework (2-2) is a spiral body formed by winding a single reinforcing bar, the first composite spiral body (2-1) and the second composite spiral body (2-3) are both formed by winding a plurality of reinforcing bars, the inner and outer layers of reinforcing bars are uniformly distributed and are synchronously wound in the same axis, the reinforcing bars of the first composite spiral body (2-1) and the second composite spiral body (2-3) have the same rotation direction and are opposite to the rotation direction of the reinforcing bar of the middle connecting framework (2-2).

2. The new and improved bend and twist resistant cement pole as claimed in claim 1, wherein: The first composite spiral body (2-1) and the second composite spiral body (2-3) are respectively welded and fixed with the middle connecting framework (2-2) to form the reinforcing cage (2).

3. The new and improved bend and twist resistant cement pole as claimed in claim 1, wherein: The middle connecting framework (2-2) is designed with a gradient pitch; the pitch gradually increases from the bottom to the top.

4. The new and improved bend and twist resistant cement pole as claimed in claim 1, wherein: The winding pitch of the middle connecting framework (2-2) is 150mm-250mm, and the pitch of the first composite spiral body (2-1) and the second composite spiral body (2-3) is both 800mm-1200mm.

5. The new and improved bend and twist resistant cement pole as claimed in claim 1, wherein: The middle connecting framework (2-2), the first composite spiral body (2-1), and the second composite spiral body (2-3) all adopt φ8mm-φ12mm cold-drawn round steel.

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