Mine sealing wall body anchor pipe

Abstract

The present application provides a kind of mine sealing wall body anchor pipe, including pipe body, pipe body includes: spiral section and locking section, the outer periphery of spiral section is equipped with spiral structure;Locking section is connected with spiral section along the axial direction and is integrally formed, the outer periphery of locking section is equipped with multiple one-way elastic barbs, wherein, when pipe body rotates along first direction, elastic barb can be laid flat and adhere to the outer surface of locking section, when pipe body rotates along second direction opposite to first direction, elastic barb can be opened and clamped and the inner wall of anchor hole that pipe body is penetrated is clamped.The present application provides stronger shear and bending support for wall body, prevents loosening due to vibration or stress change, and improves the reliability of anchoring.By adopting the structure of hollow pipe body, compared with the same diameter solid screw steel, the bending section modulus of pipe body is larger, and the weight is lighter.

Description

Technical Field

[0001] This invention relates to the field of coal mining technology, and in particular to an anchoring bolt for sealed walls in mines. Background Technology

[0002] In existing technologies, when installing sealing walls in tunnels, to ensure the stability of the sealed walls, a trenching process is typically carried out on the tunnel sidewalls, with the wall embedded within the trench. This trenching and anchoring process is labor-intensive, inefficient, and costly, and can also damage the original tunnel structure. Traditional tunnel sealing walls, especially in inclined tunnels, are prone to microscopic separation or uneven stress distribution between the wall, infill layer, and support structure due to the influence of gravity, resulting in poor overall wall integrity. Some anchoring components may fail prematurely due to stress concentration. Existing anchor bolts used for support are mostly made of threaded steel bars, whose design primarily considers axial tensile strength, but their bending and shear resistance is relatively weak. In the stress environment of sealed walls, which is mainly subjected to shear force and bending moment, traditional anchor bolts are not the optimal choice, and they are also quite heavy. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention provide an anchoring bolt for sealed mine walls, providing shear and bending resistance to the wall and preventing loosening due to vibration or stress changes.

[0004] This invention provides an anchoring bolt for sealed walls in mines, comprising a pipe body, which includes a spiral section and a locking section. The spiral section has a spiral structure on its outer periphery. The locking section is axially connected to the spiral section and integrally formed. The locking section has multiple unidirectional elastic barbs on its outer periphery. When the pipe body rotates in a first direction, the elastic barbs can bend down and fit against the outer surface of the locking section. When the pipe body rotates in a second direction opposite to the first direction, the elastic barbs can open and clamp the inner wall of the anchor hole into which the pipe body is inserted.

[0005] In some embodiments, the outer periphery of the locking section is provided with a plurality of openings, and an elastic barb is connected to one side of each opening. Each opening is located on the side of the corresponding elastic barb facing the first direction. When the tube rotates along the first direction, the elastic barb can bend down and fit against the corresponding opening.

[0006] In some embodiments, one side edge of each opening extends outward from the tube body along a first direction to form an elastic barb. The elastic barb is stamped from the tube wall material in the area where the opening is located, and the shape of the elastic barb matches the shape of the opening.

[0007] In some embodiments, the helical segment has a head end and a tail end along the axial direction, a locking segment is connected to the head end of the helical segment, and a mounting structure is fixedly connected to the tail end of the helical segment. The mounting structure is adapted to be detachably connected to the output end of the drive mechanism.

[0008] In some embodiments, a protrusion is connected to the spiral structure to increase the friction between the spiral structure and the inner wall of the anchor hole when the tube is screwed in.

[0009] In some embodiments, the protrusion structure is a tooth-like structure.

[0010] In some embodiments, a plurality of resilient barbs are evenly arranged on the outer periphery of the locking section.

[0011] In some embodiments, the tube body is hollow inside, and the opening is connected to the internal cavity of the tube body.

[0012] In some embodiments, the first end of the locking section has a grouting port.

[0013] In some embodiments, the helical structure is an external thread or a helical rib structure. Attached Figure Description

[0014] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings. in: Figure 1 This is a schematic diagram of the structure of the anchor bolt for the sealed wall of a mine in an embodiment of the present invention; Figure 2 This is a front view of the anchor bolt for the mine sealed wall in an embodiment of the present invention; Figure 3 for Figure 2 Sectional view of plane AA in the middle; Figure label: 1. Mounting structure; 2. Spiral section; 201. Spiral structure; 3. Locking section; 301. Elastic barbs; 4. Protruding structure; 5. Grouting port. Detailed Implementation

[0015] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0016] The following describes an embodiment of the present invention using an anchor bolt for a sealed mine wall, with reference to the accompanying drawings.

[0017] like Figures 1-3As shown in the figure, an embodiment of the present invention proposes an anchoring screw for a sealed wall in a mine, comprising a pipe body, which includes a spiral section 2 and a locking section 3. The spiral section 2 has a spiral structure 201 on its outer periphery. The locking section 3 is axially connected to the spiral section 2 and integrally formed. The locking section 3 has a plurality of unidirectional elastic barbs 301 on its outer periphery. The elastic barbs 301 open outward at a certain angle in their natural state. When the pipe body rotates in a first direction, the elastic barbs 301 can be bent down and attached to the outer surface of the locking section 3. When the pipe body rotates in a second direction opposite to the first direction, the elastic barbs 301 can open and clamp the inner wall of the anchor hole into which the pipe body is inserted.

[0018] This invention employs a helical friction mechanism and a mechanical self-locking mechanism to provide strong shear and bending resistance to the wall, preventing loosening due to vibration or stress changes and improving the reliability of the anchorage. By using a hollow tube structure, compared to solid threaded steel of the same diameter, the tube has a larger bending section modulus and is lighter. The helical structure 201 significantly increases the friction and mechanical engagement force with the anchor hole wall, preventing the tube from being pulled outwards axially; it also acts as a reinforcing rib, improving the overall axial compressive and bending stiffness of the tube.

[0019] In use, the output end of the drive mechanism (such as an anchoring device, a drilling and anchoring machine, or an anchor drilling and injection machine) is connected to the tail end of the spiral section 2. The drive tube is screwed into the anchor hole in the first direction (clockwise) until the designed depth is reached. After it is in place, the drive mechanism drives the tube to rotate in the second direction (counterclockwise) by about 1 / 4 to 1 / 2 turn. At this time, the elastic barbs 301 at the top of the tube open and engage with the inner wall of the anchor hole, completing the self-locking.

[0020] It should be noted that when the drive tube is screwed into the anchor hole in the first direction, the elastic barb 301 is pressed by the anchor hole wall, causing the elastic barb 301 to fall down and adhere to the outer surface of the locking section 3, allowing it to pass smoothly. After the tube is installed in place, the drive tube rotates slightly in the second direction, causing the engagement between the spiral structure 201 and the hole wall to loosen slightly, while simultaneously releasing the circumferential constraint on the elastic barb 301. Under the action of its own elastic restoring force, the elastic barb 301 instantly springs outward, its tip violently pressing against and slightly embedding into the rough surface of the rock or tiny cracks in the inner wall of the anchor hole. At this time, the elastic barb 301 constitutes a highly efficient mechanical check lock, strongly preventing the tube from rotating counterclockwise or being pulled out axially, forming a double safety mechanism together with the spiral structure 201.

[0021] Furthermore, the pipe body is made of seamless steel pipe.

[0022] Furthermore, different arrangements of the pipes on the sidewalls of the tunnel can provide support of varying strengths to the sidewalls.

[0023] In some embodiments, such as Figure 1 As shown, the outer periphery of the locking section 3 has multiple openings, and an elastic barb 301 is connected to one side of each opening. Each opening is located on the side of the corresponding elastic barb 301 facing the first direction. When the tube rotates along the first direction, the elastic barb 301 can bend down and fit towards the corresponding opening.

[0024] In some embodiments, such as Figure 1 As shown, each opening extends outward from one side edge along the first direction to form an elastic barb 301. The elastic barb 301 is stamped from the pipe wall material in the area where the opening is located, and the shape of the elastic barb 301 matches the shape of the opening.

[0025] In some embodiments, such as Figure 1 As shown, the spiral segment 2 has a head end and a tail end along the axial direction. The locking segment 3 is connected to the head end of the spiral segment 2. The spiral segment 2 is fixedly connected to the mounting structure 1 at the tail end. The mounting structure 1 is detachably connected to the output end of the drive mechanism to realize forward and reverse drive of the tube body.

[0026] In some embodiments, such as Figure 3 As shown, a protruding structure 4 is connected to the spiral structure 201 to increase the friction between the spiral structure 201 and the inner wall of the anchor hole when the tube is screwed in.

[0027] In some embodiments, such as Figure 3 As shown, the protrusion structure 4 is a tooth-like structure.

[0028] In some embodiments, such as Figure 1 As shown, multiple elastic barbs 301 are evenly arranged on the outer periphery of the locking section 3. This improves the locking effect of the locking section 3.

[0029] In some embodiments, the tube body is hollow inside, and the openings are connected to the internal cavity of the tube body. This is used to achieve the grouting function of the anchor bolts. The liquid anchoring agent can diffuse evenly into the surrounding rock mass through multiple axial openings, seeping into the cracks and improving the uniformity of the grouting.

[0030] In some embodiments, such as Figure 1 As shown, the first end of the locking section 3 has a grouting port 5, which is used to inject liquid anchoring agent into the rock mass at the front end of the pipe.

[0031] Furthermore, the first end of the locking section 3 has a conical constriction structure, which facilitates the insertion of the tube into the anchor hole.

[0032] In some embodiments, the spiral structure 201 is an external thread or a high-pitch spiral rib structure.

[0033] Preferably, the spiral structure 201 is a high-pitch spiral rib structure, which can further increase the friction and mechanical engagement force with the anchor hole wall.

[0034] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0039] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An anchor bolt for sealed walls in mines, characterized in that, Including a pipe body, the pipe body includes: A spiral segment, wherein the outer periphery of the spiral segment is provided with a spiral structure; The locking section is integrally formed and axially connected to the spiral section. The outer periphery of the locking section is provided with a plurality of unidirectional elastic barbs. When the tube rotates in a first direction, the elastic barbs can be bent down and fit against the outer surface of the locking section. When the tube rotates in a second direction opposite to the first direction, the elastic barbs can open and clamp the inner wall of the anchor hole into which the tube is inserted.

2. The anchor bolt for sealed mine walls according to claim 1, characterized in that, The outer periphery of the locking section has multiple openings, and one side of each opening is connected to an elastic barb. Each opening is located on the side of the corresponding elastic barb facing the first direction. When the tube rotates along the first direction, the elastic barb can bend down and fit against the corresponding opening.

3. The anchor bolt for sealed mine walls according to claim 2, characterized in that, Each of the openings extends outward from one side edge along the first direction to form the elastic barb, which is formed by stamping the tube wall material in the area where the opening is located, and the shape of the elastic barb matches the shape of the opening.

4. The anchor bolt for sealed mine walls according to claim 1, characterized in that, The spiral segment has a head end and a tail end along the axial direction. The locking segment is connected to the head end of the spiral segment. The spiral segment is fixedly connected to a mounting structure at the tail end. The mounting structure is adapted to be detachably connected to the output end of the drive mechanism.

5. The anchor bolt for sealed mine walls according to claim 1, characterized in that, The spiral structure is connected to a protruding structure to increase the friction between the spiral structure and the inner wall of the anchor hole when the tube is screwed in.

6. The anchor bolt for sealed mine walls according to claim 5, characterized in that, The protruding structure is a tooth-like structure.

7. The anchor bolt for sealed mine walls according to claim 1, characterized in that, Multiple elastic barbs are evenly arranged on the outer periphery of the locking section.

8. The anchor bolt for sealed mine walls according to claim 2, characterized in that, The tube is hollow inside, and the opening is connected to the internal cavity of the tube.

9. The anchor bolt for sealed mine walls according to claim 1, characterized in that, The locking section has a grouting port at its first end.

10. The anchor bolt for sealed mine walls according to claim 1, characterized in that, The spiral structure is an external thread or a spiral rib structure.

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