A concrete rod with annular prestress and a manufacturing method thereof

Abstract

The present invention relates to a concrete rod with annular prestress and a manufacturing method thereof, comprising an outer concrete rod body, a plurality of longitudinal ribs uniformly distributed inside the concrete rod body, and prestressed annular ribs wound around the outer periphery of the longitudinal ribs, characterized in that a core mold support ring is mounted on the longitudinal ribs, the inner diameter of the core mold support ring is larger than the diameter of the longitudinal ribs, and the inner convex point of the core mold support ring is tangent to the core mold. The advantages are: since the inner hole of the core mold support ring is larger than the diameter of the longitudinal ribs, the core mold support ring can be smoothly passed on the longitudinal ribs, and can be smoothly distributed along the longitudinal ribs before winding the annular ribs, the longitudinal ribs can be leaned against the inner side of the inner hole of the core mold support ring due to the tensioning force of the annular ribs, and the prestress of the annular ribs is directly transferred to the core mold through the core mold support ring, and the annular prestress is more uniform, thereby improving product quality and production efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of manufacturing concrete electric poles, communication poles and wind power towers, and in particular relates to a concrete pole with annular prestress and a manufacturing method thereof. Background Art

[0002] The steel skeleton of traditional concrete poles is composed of a frame ring, longitudinal ribs and annular ribs. Since the frame ring only prevents the longitudinal ribs from bending due to gravity, it does not need to bear large radial forces. The frame ring itself has low rigidity and no rigid support inside. After being formed, it is located inside the concrete pole body, and there are no exposed inner convex points on the inner surface of the pole body. This frame ring cannot keep the longitudinal ribs unchanged when subjected to the pressure of the annular ribs.

[0003] In order to solve the above problems, Chinese patent ZL201410062493.1 discloses a concrete rod with circumferential prestress and a method for making the same. The structure includes a concrete rod body on the periphery, longitudinal ribs evenly distributed inside the concrete rod body, outer prestressed circumferential ribs wrapped around the periphery of the longitudinal ribs, and a core mold supporting circumferential ribs are provided along the inner side of the longitudinal ribs in a circumferential direction, and the inner convex point of the core mold supporting circumferential ribs is flush with the inner surface of the concrete rod body, and the longitudinal ribs are evenly distributed around the core mold supporting circumferential ribs. Its basic principle is to transfer the tension of the circumferential ribs to the core film supporting circumferential ribs through the longitudinal ribs, and finally to the core mold. After the concrete is solidified, the core mold is removed so that the circumferential stress is transferred to the concrete to achieve the circumferential prestress effect. Although this method can achieve the effect of generating circumferential prestress, the production of the core film supporting circumferential ribs is relatively complicated, and because the core mold is relatively smooth, it is also difficult to install and position the core film supporting circumferential ribs, especially when the core mold is installed inside the longitudinal ribs, the core film supporting circumferential ribs often shift, resulting in unstable product quality. Summary of the invention

[0004] The purpose of the present invention is to provide a concrete rod with annular prestress and a manufacturing method thereof, which not only simplifies the structure and manufacturing method of the concrete rod with annular prestress, but also makes the annular prestress more uniform and consistent, thereby improving product quality. At the same time, since the core membrane supporting annular reinforcement installation and manufacturing process is eliminated, the production efficiency is also improved.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] A concrete rod with annular prestressing force of the present invention comprises an outer concrete rod body, a plurality of longitudinal ribs evenly distributed inside the concrete rod body, and prestressed annular ribs wound around the outer periphery of the longitudinal ribs. The invention is characterized in that a core mold support ring is mounted on the longitudinal ribs, the inner diameter of the core mold support ring is larger than the diameter of the longitudinal ribs, the inner convex point of the core mold support ring is tangent to the core mold, and the longitudinal ribs are tangent to the inner side of the inner hole of the core mold support ring.

[0007] As a further optimization of the present invention, the core mold support ring is aligned and sleeved on multiple longitudinal ribs or staggered and sleeved on multiple longitudinal ribs, and the spacing between them is 0.3m to 1m.

[0008] As a further optimization of the present invention, the inner hole of the core mold support ring is circular, and the outer shape is circular or polygonal.

[0009] As a further optimization of the present invention, the core mold support ring is a closed core mold support ring or a core mold support ring with an opening.

[0010] As a further optimization of the present invention, when the core mold support ring is a closed core mold support ring, its material is metal, polymer material or concrete material.

[0011] As a further optimization of the present invention, when the core mold support ring is a core mold support ring with an opening, its material is a metal material.

[0012] As a further optimization of the present invention, the height H of the inner convex point where the core mold support ring is tangent to the core mold is smaller than the wall thickness of the rod body.

[0013] As a further optimization of the present invention, the height h of the cross-sectional solid at the inner convex point where the core mold support ring is tangent to the core mold is greater than 5 mm.

[0014] Compared with the existing technology, the advantages of the invention are:

[0015] The present invention eliminates the original core mold supporting annular ribs and adopts a core mold supporting ring to replace the core mold supporting annular ribs. Since the inner hole of the core mold supporting ring is larger than the diameter of the longitudinal ribs, it can ensure that the core mold supporting ring can be smoothly passed onto the longitudinal ribs and can smoothly distribute the annular ribs evenly along the longitudinal ribs before winding them around. Due to the tensioning force of the annular ribs, the longitudinal ribs can be leaned against the inner side of the inner hole of the core mold supporting ring, that is, in a state of being tangent to the inner side of the inner hole. The prestress of the annular ribs is directly transmitted to the core mold through the core mold supporting ring. Compared with the original scheme, the operation is more flexible and convenient, the force transmission is more direct, the annular prestress is more uniform, the product quality is improved, and the production efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1A local diagram of a steel bar skeleton aligned with the core mold support ring arranged at the periphery of the core mold of the present invention.

[0017] Figure 2 A partial diagram of a staggered steel bar skeleton of a core mold support ring arranged on the periphery of the core mold of the present invention.

[0018] Figure 3 It is a cross-sectional view of a rod body whose outer periphery shape of the core mold support ring of the present invention is a polygon.

[0019] Figure 4 It is a cross-sectional view of a rod body whose outer periphery shape of the core mold support ring of the present invention is circular.

[0020] Figure 5 The core mold support ring of the present invention is a circular ring with an opening.

[0021] Figure 6 The cross-sectional view is a circular cross-sectional view of the core mold support ring of the present invention.

[0022] Figure 7 The cross-sectional view is a polygonal shape of the cross-sectional entity of the core mold support ring of the present invention. DETAILED DESCRIPTION

[0023] like Figures 1 to 7 As shown, a concrete rod with annular prestressing of the present invention comprises an outer concrete rod body 4, a plurality of longitudinal ribs 1 evenly distributed inside the concrete rod body 4, and prestressed annular ribs 3 wound around the periphery of the longitudinal ribs, and is characterized in that a core mold support ring 2 is mounted on the longitudinal ribs 1, the inner diameter of the core mold support ring 2 is larger than the diameter of the longitudinal ribs 1, the inner convex point of the core mold support ring 2 is tangent to the core mold, and the longitudinal ribs 1 are tangent to the inner side of the inner hole of the core mold support ring 2.

[0024] like Figure 1 and Figure 2 As shown, according to different longitudinal ribs, the core mold support ring 2 of the present invention is aligned and sleeved on multiple longitudinal ribs 1 or staggered and sleeved on multiple longitudinal ribs 1, and the spacing between them is 0.3m to 1m.

[0025] like Figure 3 and Figure 4 As shown, as a further optimization of the present invention, the inner hole of the core mold support ring 2 is circular, and the outer shape is circular or polygonal. When the outer shape is polygonal, the inner convex point of the polygonal core mold support ring 2 is a plane.

[0026] like Figure 5 As shown as a further optimization of the present invention, the core mold support ring 2 is a closed core mold support ring or a core mold support ring with an opening.

[0027] When the core mold support ring 2 is a closed core mold support ring, the core mold support ring 2 of the present invention is made of metal, polymer material or concrete material, and can be die-cast or forged.

[0028] When the core mold support ring 2 is a core mold support ring with an opening, the core mold support ring 2 of the present invention is made of metal material and can be formed by winding a rod.

[0029] like Figure 6 and Figure 7 As shown, as a further optimization of the present invention, the height H of the inner convex point where the core mold support ring is tangent to the core mold is less than the wall thickness of the rod body, and the height h of the cross-sectional entity at the inner convex point where the core mold support ring 2 is tangent to the core mold 5 is greater than 5 mm.

[0030] The manufacturing method of the concrete rod with annular prestressing of the present invention is: first, the core mold support ring 2 is respectively mounted on a plurality of longitudinal ribs 1 according to the specified number, and then the two ends of the longitudinal ribs 1 are respectively fixed on the hanging rib plates at the two ends, the core mold 5 is passed inside the longitudinal ribs 1, and the hanging rib plates at the two ends are fixed to the two ends of the core mold 5, and at the same time, the longitudinal ribs 1 are straightened, the core mold support ring 2 is aligned or staggered along the longitudinal ribs 1 to be evenly adjusted, and then the outer layer of annular ribs 3 is wound around the periphery of the longitudinal ribs 1 under tension. Due to the tension of the annular ribs 3, the longitudinal ribs 1 can be leaned against the inner side of the inner hole of the core mold support ring 2, that is, in contact with the core mold support ring 2. The inner side of the inner hole is tangent to the inner side of the inner hole, and the prestress of the annular reinforcement 3 is directly transferred to the surface of the core mold 5 through the core mold support ring 2 to form a concrete rod steel skeleton with annular prestress. The core mold 5 with the steel skeleton is installed into the outer mold of the rod, and concrete 4 is poured between the core mold 5 and the outer mold of the rod. After the concrete 4 solidifies, the core mold 5 is pulled out, and the pressure acting on the surface of the core mold 5 will be transferred to the concrete rod body 4. The hanging bar plates at both ends are removed, and a concrete rod with annular prestress is produced, forming a concrete rod with annular prestress composed of the core mold support ring 2, longitudinal reinforcement 1, outer prestressed annular reinforcement 3 and concrete rod body 4. The outer mold is not shown in the figure. Compared with the original scheme, it is more flexible and convenient to operate, the force transmission is more direct, the annular prestress is more uniform, and the product quality and production efficiency are improved.

Claims

1. A concrete rod with annular prestressing, comprising an outer concrete rod body, a plurality of longitudinal bars evenly distributed inside the concrete rod body, and prestressed annular bars wrapped around the outer periphery of the longitudinal bars, characterized in that: A core mold support ring is mounted on the longitudinal rib, the inner diameter of the core mold support ring is larger than the diameter of the longitudinal rib, the inner convex point of the core mold support ring is tangent to the core mold, and the longitudinal rib is tangent to the inner side of the inner hole of the core mold support ring.

2. The concrete rod with annular prestressing according to claim 1, characterized in that: The core mold support ring is aligned and sleeved on multiple longitudinal ribs or staggered and sleeved on multiple longitudinal ribs, and the spacing between them is 0.3m to 1m.

3. The concrete rod with annular prestressing according to claim 1, characterized in that: The inner hole of the core mold support ring is circular, and the outer shape is circular or polygonal.

4. The concrete rod with annular prestressing according to claim 1, characterized in that: The core mold support ring is a closed core mold support ring or a core mold support ring with an opening.

5. The concrete rod with annular prestressing according to claim 4, characterized in that: When the core mold support ring is a closed core mold support ring, its material is metal, polymer material or concrete.

6. The concrete rod with annular prestressing according to claim 4, characterized in that: When the core mold support ring is a core mold support ring with an opening, its material is metal.

7. The concrete rod with annular prestressing according to claim 1, characterized in that: The height H of the convex point in the core mold support ring is smaller than the wall thickness of the rod body.

8. The concrete rod with annular prestressing according to claim 1, characterized in that: The height h of the cross-section entity at the inner convex point where the core mold support ring is tangent to the rod body core mold is greater than 5mm.

9. A method for manufacturing a concrete rod with annular prestress, using any one of the concrete rods with annular prestress according to claims 1 to 8, characterized in that: First, the core mold support rings are respectively mounted on multiple longitudinal ribs according to the specified number, and then the two ends of the longitudinal ribs are respectively fixed on the hanging rib discs at both ends, the core mold is passed inside the longitudinal ribs, and the hanging rib discs at both ends are fixed to the two ends of the core mold, and at the same time, the longitudinal ribs are straightened, and the core mold support rings are evenly aligned or staggered along the longitudinal ribs, and then the outer layer of annular ribs are wrapped around the periphery of the longitudinal ribs under tension. Due to the tension of the annular ribs, the longitudinal ribs can be pressed against the inner side of the inner hole of the core mold support ring, that is, they are tangent to the inner side of the inner hole of the core mold support ring. The prestress of the annular reinforcement is directly transferred to the surface of the core mold through the core mold support ring to form a steel skeleton of a concrete rod with annular prestress. The core mold with the steel skeleton is installed into the outer mold of the rod, and concrete is poured between the core mold and the outer mold of the rod. After the concrete solidifies, the core mold is pulled out, and the pressure acting on the surface of the core mold will be transferred to the concrete rod body. The hanging bar plates at both ends are removed to produce a concrete rod with annular prestress, forming a concrete rod with annular prestress composed of a core mold support ring, longitudinal reinforcement, outer prestressed annular reinforcement and a concrete rod body.

Images