Grouting anchor rod with movable barbs of hinged structure

Abstract

The utility model relates to a grouting anchor rod with movable barbs of a hinged structure. The grouting anchor rod comprises an inner core device, a shell device and a hinged supporting rod device. The inner core device comprises an inner core main rod body, a fixed block and an expansion column head; the shell device comprises a shell rod body, an anchor tip barb body, an anchor body barb body, a fixing hook, a fixing transverse edge and an expansion round shell. The hinged supporting rod device comprises a hinged structure and a supporting rod. The outer shell rod body and the inner core main rod body are both cylindrical, and the anchor tip barb bodies and the anchor body barb bodies are located at quartering points of the outer shell rod body. The fixing transverse edges are evenly arranged in the rod body cavity and placed corresponding to the fixing blocks, hinge structures on the fixing blocks are connected with supporting rods, and the other ends of the supporting rods are of barb structures and matched with hook teeth of the fixing hooks. External force is applied to the tail end of the inner core main rod body, the expansion column head enters the expansion round shell, the anchor tip barb body is squeezed by the rod body front cavity to pierce out, the anchor body barb body is unfolded under the action of the hinged supporting rod device, and the overall anchoring stability and tensile strength of the anchor rod are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of support anchor rod, concretely relates to a grouting anchor rod with hinged structure movable barb. BACKGROUND

[0002] Anchor rod occupies an important position in the coal mine roadway support system, it utilizes the self characteristics to combine the roadway surrounding rock closely, realized the self support of surrounding rock. Anchor rod is not only widely used in mining, but also plays an important role in the field of engineering technology. As the key component of bearing tension in the underground, one end of anchor rod is firmly connected with engineering structure, and the other end is deeply embedded in stratum or rock soil layer. The overall structure of anchor rod is divided into free section and anchoring section, wherein the free section bears the important task of conducting the tension of anchor rod head to anchoring body, thereby realizing the prestress loading of anchor rod.

[0003] The traditional anchor rod connection mode mainly relies on screwing into rock and soil, and the anchor rod and rock and soil are only connected through thread engagement, the connection form is relatively single, the fixing point is not flexible enough, the firmness of the overall structure cannot be guaranteed, and problems such as loosening may occur. In order to overcome these deficiencies, relevant technical personnel innovatively developed a new type of grouting anchor rod with hinged structure movable barb. SUMMARY

[0004] The utility model provides a grouting anchor rod with hinged structure movable barb.

[0005] Among them, the inner core main rod body, the fixed block and the expansion column head combine to form an inner core device; the anchor rod shell rod body, the anchor tip barb body, the anchor body barb body, the fixed hook, the fixed horizontal edge and the expansion round shell form an outer shell device; the hinged structure and the support rod combine to form a hinged support rod device; the interaction between the hinged support rod device and the fixed block and the fixed horizontal edge connects the inner core device and the outer shell device together to form an anchor rod whole.

[0006] The utility model provides a new type of anchor rod with hinged structure movable barb, the shell rod body and the inner core main rod body of anchor rod are all cylindrical, the anchor tip barb body and the anchor body barb body on the outer shell device are respectively located on the four equal division points of the anchor tip and the anchor body fixed position of the shell rod body. The fixed horizontal edge connected with the outer shell device is evenly arranged in the rod body cavity, and is placed in correspondence with the four equal division fixed block on the corresponding position, the hinged structure on the fixed block is connected with the support rod, and the other end of the support rod is in the form of a barb structure and is engaged with the fixed hook hook tooth on the inner side of the corresponding anchor body barb body, and is connected in engagement. The hinged support rod device connects the anchor rod inner core device and the outer shell device together to form an anchor rod whole through the engagement connection of the support rod barb and the fixed hook, and the interaction between the fixed block on the inner core device and the fixed horizontal edge in the outer shell device longitudinally restricts the relative movement of the inner core device and the outer shell device, and ensures the overall stability of the anchor rod in the initial state.

[0007] The initial state anchor rod is driven into the pre-prepared hole, an external force is applied to the tail end of the inner core main rod body, the expanding column head is forced to enter the expanding cylindrical shell, the expanding cylindrical shell expands outward, and the surrounding rock mass is extruded to increase the stability of the anchor head. The anchor tip barb body is pressed into the interior of the rock-soil body under the action of the inner core main rod body front cavity under the action of the external force, thereby enhancing the stability of the anchor tip. The anchor body barb body is away from the anchor rod body under the action of the hinged strut device, the barb is unfolded, and the anchor body is deeply embedded in the rock-soil interior, thereby improving the anchoring stability and tensile strength of the anchor body. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 is an initial state anchor rod overall structure schematic diagram;

[0009] Figure 2 is a force state anchor rod overall structure schematic diagram;

[0010] Figure 3 is an anchor rod inner core device schematic diagram;

[0011] Figure 4 is an anchor rod outer shell device schematic diagram;

[0012] Figure 5 is an expanding head device schematic diagram;

[0013] Figure 6 is a hinged strut device detail schematic diagram.

[0014] Legend, 1, anchor rod outer shell rod body, 2, anchor tip barb body, 3, anchor body barb body, 4, fixed hook, 5, fixed horizontal edge, 6, fixed block, 7, inner core main rod body, 8, hinged structure, 9, strut, 10, expanding column head, 11, expanding cylindrical shell. DETAILED DESCRIPTION

[0015] The utility model patent will be further clearly and completely described below in combination with the drawings and specific embodiments. All other embodiments obtained by the person skilled in the art without creative labor based on the implementation of the utility model patent belong to the scope of protection of the utility model patent.

[0016] As Figures 1-6 shown, the utility model relates to a grouting anchor rod with hinged structure movable barb, include: inner core device, outer shell device, hinged strut device;

[0017] The inner core device comprises an inner core main rod body (7), fixed blocks (6) and expansion column heads (10); the shell device comprises an anchor rod shell rod body (1), anchor tip barb bodies (2), anchor body barb bodies (3), fixed hooks (4), fixed horizontal edges (5) and expansion round shells (11); the articulated support rod device comprises an articulated structure (8) and support rods (9); the above-mentioned components are combined to form an anchor rod as a whole.

[0018] The inner core main rod body (7) is in a cylindrical shape, the rod body head is connected with the expansion column head (10), the fixed blocks (6) are provided in plurality and are placed on the four equal division points of the fixed positions of the inner core main rod body (7). The fixed horizontal edges (5) are provided in plurality and are uniformly arranged in the cavity of the shell rod body (1) and are placed in correspondence with the fixed blocks (6) at the corresponding positions. The shell rod body (1) is in a cylindrical shape, the anchor tip barb bodies (2) and the anchor body barb bodies (3) are provided in plurality and are respectively located on the four equal division points of the fixed positions of the anchor tip and the anchor body of the shell rod body (1). The articulated structure (8) is located above the fixed blocks (6), the end hooks of the support rods (9) connected with the articulated structure (8) are respectively connected with the fixed hooks (4) on the inner sides of the corresponding anchor body barb bodies (3). The expansion round shell (11) is located at the tip of the shell rod body (1) and the expansion column head (10) is located at the tip of the inner core main rod body (7).

[0019] Before the anchor rod is used, the articulated support rod device inside the anchor rod is connected with the anchor rod shell device to form an anchor rod as a whole through the engagement of the hooks of the support rods (9) and the fixed hooks (4), the interaction between the fixed blocks (6) on the inner core device and the fixed horizontal edges (5) in the shell device longitudinally restricts the relative movement of the inner core device and the shell device, thereby strengthening the overall stability of the anchor rod in the initial state.

[0020] When the anchor rod is used, the anchor hole is pre-drilled on the rock mass, the anchor rod in the initial state is drilled into the hole, an external force is applied to the tail end of the inner core main rod body (7), the expansion column head (10) is forced to enter the expansion round shell (11), the expansion round shell (11) is expanded outward to extrude the surrounding rock mass, thereby increasing the stability of the anchor head. The anchor tip barb bodies (2) are extruded by the front cavity of the inner core main rod body (7) and are pierced into the interior of the rock-soil body under the action of the external force, thereby enhancing the stability of the anchor tip. The anchor body barb bodies (3) are driven away from the anchor rod body by the articulated support rod device, the barbs are unfolded and deeply penetrate into the rock-soil interior, thereby improving the anchoring stability and tensile strength of the anchor body.

[0021] The above describes the grouting anchor rod with articulated structure movable barbs provided by the present application, for ordinary skilled persons in the art, the embodiments can be variously changed, modified, replaced and transformed without departing from the principles and spirits of the present application, and the adjustment should be covered in the protection scope of the present application.

Claims

1. A grouting anchor rod with a hinged structure movable barb, comprising a core device, a shell device and a hinged strut device, characterized in that: The inner core device is arranged inside the outer shell device, and the articulated support rod device is arranged between the inner core device and the outer shell device; The inner core device comprises an inner core main rod body (7), fixing blocks (6) and expansion column heads (10), the inner core main rod body (7) is in a cylindrical shape, the rod body head is connected with the expansion column heads (10), and the fixing blocks (6) are provided in multiple numbers and are arranged at four equal division points of the fixed positions of the inner core main rod body (7); The outer shell device comprises an outer shell rod body (1), anchor tip barb bodies (2), anchor body barb bodies (3), fixing hooks (4), fixing horizontal edges (5) and expansion round shells (11), the outer shell rod body (1) is in a cylindrical shape, the rod body head is connected with the expansion round shell (11), the anchor tip barb bodies (2) and the anchor body barb bodies (3) are provided in multiple numbers and are respectively arranged at four equal division points of the fixed positions of the anchor tip and the anchor body of the outer shell rod body (1), and the fixing horizontal edges (5) are provided in multiple numbers and are uniformly arranged in the rod body cavity; The articulated support rod device comprises an articulated structure (8) and a support rod (9), the articulated structure (8) is arranged above the fixing blocks (6) and is connected with the support rod (9) in a hinged manner.

2. A grouting anchor rod with a hinged structure movable barb according to claim 1, characterized in that: The fixing horizontal edges (5) at different positions in the outer shell device are correspondingly arranged with the four equal division fixing blocks (6) at different positions in the inner core device.

3. The grouting anchor rod with the hinged structure movable barb according to claim 1, characterized in that: The other end of the support rod (9) is in a reverse hook structure and is connected with the fixing hook (4) in the inside of the anchor body barb body (3) in a hooking and biting manner.

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