Screw anchor with band saw blade anchor head

Abstract

The utility model discloses a spiral anchor with sawtooth type anchor head, which comprises an anchor pipe, anchor discs and a sawtooth type anchor head. The anchor pipe is a hollow anchor pipe. The anchor discs are multiple and fixed on the outer periphery of the anchor pipe along the axial direction of the anchor pipe. The sawtooth type anchor head is fixedly connected to the bottom of the anchor pipe, and a soil passing gap is formed between the sawtooth type anchor head and the anchor pipe. The spiral anchor has a reasonable structure, can increase the agitation of the soil body, is beneficial to the destruction of the firm cementation bond between soil particles, and can make the dispersed soil particles enter the anchor pipe through the soil passing gap, thereby releasing the rotation space of the anchor disc, reducing the torque resistance of the spiral anchor, and facilitating the smooth penetration of the spiral anchor into the designed depth.

Description

Technical Field

[0001] This utility model relates to the field of power transmission line foundations, and specifically provides a spiral anchor with a serrated anchor head, which is suitable for tower sites with hard soil that are difficult to drill into. Background Technology

[0002] In arid and semi-arid climates, soils are prone to salinization, and alkaline environments (high pH values) can very easily and universally cause sandy soils to harden and cement. In cemented soils, cementing substances bridge at the contact points of soil particles, forming strong cementing bonds. These bonds connect multiple particles into a stable three-dimensional network structure, which macroscopically manifests as soil hardening and increased strength.

[0003] In existing technologies, the lower end of the spiral anchor is usually designed as an anchor tip structure. If this structure is used in the above-mentioned cemented areas, when the spiral anchor rotates to a certain depth, it will spin freely because it needs to break the strong cemented bonds between soil particles, and will not be able to be driven into the designed depth smoothly.

[0004] Therefore, proposing a novel spiral anchor structure that can be easily driven into the designed depth in hard soil areas has become an urgent problem to be solved. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a spiral anchor with a serrated anchor head to solve the problems existing in the prior art.

[0006] This utility model provides a sawtooth anchor head, comprising: an anchor tube, an anchor plate, and a sawtooth anchor head, wherein the anchor tube is a hollow anchor tube, the anchor plates are multiple and fixed at intervals along the axial direction of the anchor tube on the outer periphery of the anchor tube, and the sawtooth anchor head is fixedly connected to the bottom of the anchor tube and a soil-passing gap is formed between the sawtooth anchor head and the anchor tube.

[0007] Preferably, the serrated anchor head includes a central tooth tip and a plurality of circumferential tooth tips, wherein the circumferential tooth tips are arranged at circumferential intervals along the central tooth tip.

[0008] Further preferably, the length of the circumferential tooth tip is less than the length of the central tooth tip.

[0009] Further preferably, the serrated anchor head is composed of multiple serrated plates connected together, wherein the middle of each plate is fixedly connected, and the outer side of each plate is fixedly connected to the bottom of the anchor pipe.

[0010] Further preferably, the anchor disc closest to the serrated anchor head includes a spiral anchor disc with a smooth outer periphery and an involute anchor disc with serrations on its outer periphery. The involute anchor disc is fixedly connected to the free end of the spiral anchor disc at its lower part and is fixedly connected to the outer periphery of the anchor pipe.

[0011] The serrated anchor provided by this utility model can increase the agitation of the soil through the serrated structure on the serrated anchor head, which is conducive to breaking the strong cement bonds between soil particles. After agitation, the dispersed soil particles can enter the anchor tube through the soil gap, thereby releasing the rotation space of the anchor plate, reducing the twisting resistance of the serrated anchor, and facilitating the smooth driving of the serrated anchor into the designed depth. Attached Figure Description

[0012] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments: Figure 1 A schematic diagram of the spiral anchor with a serrated anchor head provided by this utility model; Figure 2 A schematic diagram of the structure of the sawtooth anchor head; Figure 3 This is a side view of a sawtooth anchor head. Detailed Implementation

[0013] The present invention will be further explained below with reference to specific implementation schemes, but it is not limited to the present invention.

[0014] To address the issue that existing helical anchors cannot smoothly descend to their designed depth in hard soil areas, such as... Figure 1 , Figure 2 As shown, this utility model provides a spiral anchor with a serrated anchor head, including: an anchor tube 1, an anchor plate 2, and a serrated anchor head 3. The anchor tube 1 is a hollow anchor tube, and the anchor plates 2 are multiple and fixed at intervals along the axial direction of the anchor tube 1 on the outer periphery of the anchor tube 1. The serrated anchor head 3 is fixedly connected to the bottom of the anchor tube 1, and a soil-passing gap 4 is formed between the serrated anchor head 3 and the anchor tube 1.

[0015] This spiral anchor with a serrated anchor head can increase the agitation of the soil through the serrated structure on the anchor head, which helps to break the strong cement bonds between soil particles. After agitation, the dispersed soil particles can enter the anchor tube through the soil gap, thereby releasing the rotation space of the anchor plate, reducing the twisting resistance of the spiral anchor, and making it easier for the spiral anchor to be driven into the designed depth.

[0016] As an improvement to the technical solution, such as Figure 2 As shown, the sawtooth anchor head 3 includes a central tooth tip 31 and a plurality of circumferential tooth tips 32, wherein the circumferential tooth tips 32 are arranged at circumferential intervals along the central tooth tip 31. By dispersing the position of the teeth, the agitation of the soil can be effectively increased. Preferably, there are 4 circumferential tooth tips 32.

[0017] As an improvement to the technical solution, such as Figure 2 As shown, the length of the circumferential tooth tip 32 is less than the length of the central tooth tip 31, preferably, as... Figure 3 As shown, the length of the circumferential tooth tip 32 is equal to 1 / 3 of the length of the central tooth tip 31, and the expansion angle of the central tooth tip 31 is 40 degrees.

[0018] As an improvement to the technical solution, such as Figure 2 As shown, the serrated anchor head 3 is composed of multiple serrated plates connected together. The middle of each plate is fixedly connected to form a central tooth tip. The outer side of each plate is fixedly connected to the bottom of the anchor pipe 1. The free end of the outer side of each plate is cut with a circumferential tooth tip. Preferably, each circumferential tooth tip does not protrude from the cylindrical space corresponding to the outer circumference of the anchor pipe. The tooth tip and the plate are an integral structure and do not protrude from the main body of the serrated anchor head. Compared with protruding teeth, it is not easily damaged.

[0019] As an improvement to the technical solution, such as Figure 2 As shown, the anchor plate 2 closest to the serrated anchor head 3 includes a spiral anchor plate 21 with a smooth outer circumference and an involute anchor plate 22 with serrations on its outer circumference. The involute anchor plate 22 is fixedly connected to the free end of the spiral anchor plate 21 at the lower part and is fixedly connected to the outer circumference of the anchor pipe 1. By adding an involute anchor plate to the existing spiral anchor plate and designing its outer circumference as serrated, it is easier to cut the surrounding soil and loosen the soil. With the help of the hollow anchor pipe to discharge the soil, the twisting resistance can be reduced.

[0020] The specific embodiments of this utility model are written in a progressive manner, emphasizing the differences between each implementation scheme, and the similar parts can be referred to each other.

[0021] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A spiral anchor with a serrated anchor head, characterized in that, include: Anchor pipe (1), anchor plate (2) and sawtooth anchor head (3), wherein the anchor pipe (1) is a hollow anchor pipe, the anchor plate (2) is multiple and fixed at intervals along the axial direction of the anchor pipe (1) on the outer periphery of the anchor pipe (1), and the sawtooth anchor head (3) is fixedly connected to the bottom of the anchor pipe (1) and a soil gap (4) is formed between the sawtooth anchor head (3) and the anchor pipe (1).

2. The helical anchor with a serrated anchor head according to claim 1, characterized in that: The sawtooth anchor head (3) includes a central tooth tip (31) and a plurality of circumferential tooth tips (32), wherein the circumferential tooth tips (32) are arranged at circumferential intervals along the central tooth tip (31).

3. The helical anchor with a serrated anchor head according to claim 2, characterized in that: The length of the circumferential tooth tip (32) is less than the length of the central tooth tip (31).

4. The helical anchor with a serrated anchor head according to claim 1, characterized in that: The serrated anchor head (3) is composed of multiple serrated plates connected together, wherein the middle of each plate is fixedly connected and the outer side of each plate is fixedly connected to the bottom of the anchor pipe (1).

5. The helical anchor with a serrated anchor head according to claim 1, characterized in that: The anchor plate (2) closest to the sawtooth anchor head (3) includes a spiral anchor plate (21) with a smooth outer periphery and an involute anchor plate (22) with sawtooth on its outer periphery. The involute anchor plate (22) is fixedly connected to the free end of the spiral anchor plate (21) at the lower part and is fixedly connected to the outer periphery of the anchor pipe (1).

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