High-strength and corrosion-resistant composite hollow anchor rod structure

Abstract

The utility model relates to the technical field of anchor rods, in particular to a high-strength and corrosion-resistant composite hollow anchor rod structure which comprises a steel rod body, an inner hole is formed in the rod body to form a hollow structure, an outer spiral groove is formed in the outer wall of the rod body, and a glass fiber reinforced plastic strip is wound and compounded in the outer spiral groove. The internal rotation part of the glass fiber reinforced plastic strip is adaptively fixed in the external spiral groove, and the external rotation part of the glass fiber reinforced plastic strip protrudes out of the outer wall surface of the rod body; the anchor rod structure not only has high strength and high toughness, but also can ensure light weight and corrosion resistance.

Description

Technical Field

[0001] The utility model relates to the technical field of anchor rods, in particular to a high-strength and corrosion-resistant composite hollow anchor rod structure. Background Art

[0002] As is known, with the development of the industry, there are many types of self-drilling anchor rods. At present, steel products are the most widely used in the market. For some high-bearing capacity requirements, alloy steel materials will be selected. For some environments with high anti-corrosion requirements, surface protection treatment or stainless steel materials will be used. Although steel anchor rods are the most widely used, there are several problems, such as large size and weight of large-bearing rod bodies, high strength and high toughness of materials cannot be taken into account, low force value or brittle fracture is prone to occur, it is relatively heavy to use on the construction site, the comprehensive cost is high, the anchoring support effect is limited, it is easily affected by the corrosive environment, and there are certain safety hazards.

[0003] In addition to steel anchor rods, fiberglass is also used for temporary support of coal mines and tunnels, such as the fiberglass anchor rod disclosed in the Chinese invention patent with announcement number CN103867222A. Since fiberglass is a fiber-reinforced plastic, it has the characteristics of light weight and corrosion resistance. However, since the material is a composite material, it is resistant to tension but not bending, has poor plasticity and toughness, and is difficult to surpass alloy steel in torsion resistance and strength. Therefore, it is difficult to make a large-bearing-capacity rod body, and the usage scenarios are extremely limited. Therefore, there is a need for an anchor rod with a special structure that can integrate the advantages of the characteristics. Utility Model Content

[0004] In order to overcome the deficiencies in the background technology and solve the existing technical problems, the utility model discloses a high-strength and corrosion-resistant composite hollow anchor rod structure, which not only has high strength and high toughness, but also can ensure light weight and corrosion resistance.

[0005] In order to achieve the above-mentioned invention object, the utility model adopts the following technical solutions:

[0006] A high-strength and corrosion-resistant composite hollow anchor rod structure comprises a steel rod body, wherein the rod body is provided with an inner hole to form a hollow structure, an outer spiral groove is provided on the outer wall of the rod body, a glass fiber reinforced plastic strip is wound and composited in the outer spiral groove, an inner rotating portion of the glass fiber reinforced plastic strip is adapted and fixed in the outer spiral groove, and an outer rotating portion of the glass fiber reinforced plastic strip protrudes from the outer wall surface of the rod body.

[0007] Furthermore, the outer spiral groove is integrally distributed around the rod body.

[0008] Furthermore, the cross section of the fiberglass reinforced plastic strip is elliptical or shuttle-shaped, and the small curvature side of the cross section corresponds to the outer spiral groove.

[0009] Furthermore, the groove width of the outer spiral groove is 0.9 to 1.1 times the net distance between adjacent grooves.

[0010] Furthermore, the rod body is made of carbon steel, alloy steel or stainless steel.

[0011] Furthermore, the inner hole of the rod body is provided with an inner spiral groove corresponding to the position of the outer spiral groove.

[0012] Due to the adoption of the above-mentioned technical solution, the utility model has the following beneficial effects:

[0013] The disclosed high-strength and corrosion-resistant composite hollow anchor bolt structure of the utility model has a main rod body made of steel and a hollow structure. While reducing a certain weight, it retains the characteristics of high strength and high toughness of the steel rod body. The protruding threaded part that is most prone to corrosion in the traditional rod body can be replaced with a fiberglass material in the form of spiral clamping and composite bonding. On the basis of stable connection, the overall corrosion resistance of the anchor bolt is greatly improved, and the weight is further reduced at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a three-dimensional schematic diagram of the implementation structure of the utility model;

[0015] Figure 2 is Figure 1 the cross-sectional structure schematic diagram of

[0016] Figure 3 is a cross-sectional schematic diagram of another implementation structure of the utility model.

[0017] In the figure: 1. Rod body; 101. Outer spiral groove; 102. Inner hole; 103. Inner spiral groove; 2. Fiberglass strip. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following will combine the drawings in the embodiments of the utility model to describe the technical solutions of the utility model. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right", etc. indicating the orientation or position relationship, they are only corresponding to the drawings of the utility model for the convenience of describing the utility model, rather than indicating or implying that the device or element referred to must have a specific orientation: Embodiment 1:

[0019] Combined with the attached Figure 1 and 2The described high-strength and corrosion-resistant composite hollow anchor rod structure includes a steel rod body 1, and the rod body 1 can be made of carbon steel, alloy steel or stainless steel; an inner hole 102 is provided in the rod body 1 to form a hollow structure, thus greatly reducing the weight. An external spiral groove 101 is provided on the outer wall of the rod body 1, and the external spiral groove 101 uniformly covers the whole body of the rod body 1 to ensure the consistency of the characteristics of the whole rod body 1; a fiberglass strip 2 is wound and compounded in the external spiral groove 101, and the inner rotating part of the fiberglass strip 2 is adaptively fixed in the external spiral groove 101, generally by an adhesive fixing method. The outer rotating part of the fiberglass strip 2 protrudes from the outer wall surface of the rod body 1 to facilitate firm connection to the outside; as required, the cross-section of the strip segment of the fiberglass strip 2 is oval or fusiform, and the small curvature side of the strip segment cross-section corresponds to the external spiral groove 101. By increasing the contact fixing area, the compounding is ensured to be firm, and the exposed area is also larger, improving the corrosion resistance; in addition, the groove width of the external spiral groove 101 is 0.9 - 1.1 times the adjacent groove net distance. Generally, the groove width of the external spiral groove 101 is equal to the adjacent groove net distance to ensure the uniformity of the characteristics of the whole rod body 1.

[0020] For the high-strength and corrosion-resistant composite hollow anchor rod structure of the present utility model, the steel rod body 1 is formed by rolling, and then the fiberglass strip 2 is compounded and bonded according to the spiral shape of the spiral groove 101 of the rod body 1. The overall weight is lighter than that of the traditional steel rod body 1, and at the same time, it has a certain corrosion resistance effect, and has the high strength and high toughness characteristics of the traditional steel rod body 1. Embodiment Two:

[0021] As shown in the attached Figure 3 figure, on the basis of Embodiment One, an internal spiral groove 103 corresponding to the position of the external spiral groove 101 is provided in the inner hole 102 of the rod body 1, so that the overall thickness is uniform, and while further reducing the weight, the toughness and torsional requirements can be increased.

[0022] The parts not detailed in the present utility model are prior arts. For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model; therefore, from any point of view, the above-mentioned embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model, and any reference signs in the claims should not be regarded as limiting the content of the claims involved.

Claims

1. A high-strength and corrosion-resistant composite hollow anchor structure, characterized by: The invention comprises a steel rod body (1), wherein the rod body (1) is provided with an inner hole (102) to form a hollow structure, and an outer wall of the rod body (1) is provided with an outer spiral groove (101), a glass fiber reinforced plastic strip (2) is wound and compounded in the outer spiral groove (101), an inner spiral portion of the glass fiber reinforced plastic strip (2) is adapted to be fixed in the outer spiral groove (101), and an outer spiral portion of the glass fiber reinforced plastic strip (2) protrudes from the outer wall surface of the rod body (1).

2. The high-strength and corrosion-resistant composite hollow anchor structure according to claim 1 is characterized by: The outer spiral groove (101) is integrally formed all over the rod body (1).

3. The high-strength and corrosion-resistant composite hollow anchor structure according to claim 1 is characterized by: The bar segment cross section of the glass fiber reinforced plastic bar (2) is elliptical or shuttle-shaped, and the small curvature side of the bar segment cross section corresponds to the outer spiral groove (101).

4. The high-strength and corrosion-resistant composite hollow anchor structure according to claim 1 is characterized by: The groove width of the outer spiral groove (101) is 0.9 to 1.1 times the net distance between adjacent grooves.

5. The high-strength and corrosion-resistant composite hollow anchor structure according to claim 1 is characterized by: The rod body (1) is made of carbon steel, alloy steel or stainless steel.

6. The high-strength and corrosion-resistant composite hollow anchor structure according to claim 1 is characterized by: The inner hole (102) of the rod body (1) is provided with an inner spiral groove (103) corresponding to the position of the outer spiral groove (101).

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