Drilling, bolting and grouting integrated energy absorption and pressure relief anchor rod

Abstract

The drilling, bolting and grouting integrated energy absorption and pressure relief anchor rod comprises a rod body, a drill bit, a tray, a wavy pipe and a locknut, a hollow cavity is formed in the rod body in the axial direction, a left-hand thread is arranged at the first end of the rod body, and a right-hand thread is arranged at the second end of the rod body; the drill bit is connected or welded to the first end of the rod body through threads, and a liquid outlet hole is formed in the drill bit in the axial direction. A through hole is formed in the center of the tray; the tray is sleeved from the second end of the rod body and is clamped at the right-hand thread through an inclination adjusting ball pad; the right-hand threads are sleeved with the corrugated pipe from the second end of the rod body, one end of the corrugated pipe is connected to the bottom of the inclination adjusting ball pad, the other end of the corrugated pipe abuts against the end face of the lock nut, and the lock nut is screwed to the second end of the rod body. The utility model solves the problem that the construction steps of the anchor rod of a coal mine tunnel or a tunnel are tedious, simplifies the construction steps of the anchor rod, reduces the cost, improves the working efficiency, realizes one-time completion of punching, hole washing, grouting and pre-tightening in the construction of the anchor rod, and has the characteristic of resisting rock burst.

Description

Technical Field

[0001] This utility model relates to the field of anchor bolt technology, and in particular to an integrated drilling, anchoring and injection energy-absorbing and pressure-relieving anchor bolt. Background Technology

[0002] Anchor grouting support technology has been widely used in tunnel and mine shaft engineering. Conventional anchor grouting support methods are achieved through hollow anchor bolts and hollow anchor cables. In the existing anchor bolt construction process, drilling, hole washing, grouting, and pre-tightening need to be completed using different equipment, which is relatively cumbersome and inefficient. Summary of the Invention

[0003] This utility model aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this utility model provide an integrated drilling, anchoring, and grouting energy-absorbing and pressure-relieving anchor bolt, which solves the problem of cumbersome anchor bolt construction steps in coal mine roadways or tunnels, simplifies anchor bolt construction steps, improves work efficiency, and enables anchor bolt construction—including drilling, hole cleaning, grouting, and pre-tightening—to be completed in one step, while also possessing resistance to impact pressure.

[0004] This utility model embodiment proposes an integrated drilling, anchoring, and injection energy-absorbing and pressure-relieving anchor bolt, comprising: a rod body, a drill bit, a tray, a corrugated tube, and a lock nut. The rod body has a hollow cavity along the axial direction and has a first end and a second end along the axial direction. The first end of the rod body has a left-hand thread, and the second end of the rod body has a right-hand thread. The second end of the rod body has a liquid inlet hole. The drill bit is connected to the first end of the rod body by thread or welding and has a liquid outlet hole along the axial direction, which is connected to the hollow cavity of the rod body. The tray has a through hole in the center, the diameter of which is larger than the outer diameter of the rod body. The tray is inserted into the second end of the rod body and is secured to the right-hand thread by an adjustment ball pad. The corrugated tube is inserted into the right-hand thread from the second end of the rod body. One end of the corrugated tube is connected to the bottom of the adjustment ball pad, and the other end of the corrugated tube abuts against the end face of the lock nut. The lock nut is screwed onto the second end of the rod body.

[0005] In some embodiments, the lock nut includes an outer nut and a tapered nut, which are respectively screwed into a right-hand thread. The threaded hole of the outer nut includes a straight threaded hole and a tapered hole that are connected. The tapered hole is located below the straight threaded hole, and the tapered nut is located inside the tapered hole, with the upper end of the tapered nut abutting against the inclined surface of the tapered hole.

[0006] In some embodiments, the angle of inclination between the inclined surface of the tapered hole and the horizontal plane is smaller than the angle of inclination of the inclined surface of the tapered nut.

[0007] In some embodiments, the rod body is provided with helical ribs.

[0008] In some embodiments, the outer nut is a stepped nut, including a first nut portion and a second nut portion, which are integrally formed. The first nut portion is located above the second nut portion, and the outer diameter of the first nut portion is larger than the outer diameter of the second nut portion. Both the straight threaded hole and the tapered hole are located inside the first nut portion.

[0009] In some embodiments, the cross-section of the second nut portion is circular or regular hexagonal.

[0010] In some embodiments, the tapered nut has a wide end and a narrow end along the axial direction, and the narrow end of the tapered nut has a contraction groove.

[0011] In some embodiments, the tray is a butterfly tray or a flat tray.

[0012] In some embodiments, the edge of the upper end face of the first nut portion is rounded.

[0013] In some embodiments, a mixing mechanism is provided in the liquid inlet. Attached Figure Description

[0014] The above and / or additional aspects and advantages of this invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings.

[0015] in:

[0016] Figure 1 This is a schematic diagram of the integrated drilling, anchoring, and injection energy-absorbing and pressure-relieving anchor bolt in an embodiment of this utility model;

[0017] Figure 2 for Figure 1 A schematic diagram of the internal structure of the lock nut in the diagram;

[0018] Figure 3 for Figure 1 The diagram shows the structure when the pallet is a flat pallet; Attached image description:

[0020] 1. Drill bit; 2. Rod body; 21. Spiral rib; 3. Tray; 4. Inclined ball pad; 5. Wave tube; 6. Anti-loosening nut; 61. First nut section; 62. Second nut section; 7. Tapered nut; 71. Shrinkage groove. Detailed Implementation

[0021] The embodiments of the present invention are described in detail below, examples of which are shown 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.

[0022] The following describes an embodiment of the drill-anchor-injection integrated energy-absorbing and pressure-relieving anchor bolt of this utility model with reference to the accompanying drawings.

[0023] like Figure 1-3 As shown in the figure, this utility model embodiment proposes an integrated drilling, anchoring, and injection energy-absorbing and pressure-relieving anchor rod, including: a rod body 2, a drill bit 1, a tray 3, and a corrugated tube 5. The rod body 2 has a hollow cavity along the axial direction. The rod body 2 has a first end and a second end along the axial direction. The first end of the rod body 2 has a left-hand thread, and the second end of the rod body 2 has a right-hand thread. The second end of the rod body 2 has a liquid inlet hole. The drill bit 1 is connected to the first end of the rod body 2 by thread or welding. The drill bit 1 has a liquid outlet hole along the axial direction, which is connected to the hollow cavity of the rod body 2. The tray 3 has a through hole in the center. The diameter of the through hole is larger than the outer diameter of the rod body 2. The tray 3 is inserted from the second end of the rod body 2 and is locked at the right-hand thread by an adjusting ball pad 4. The corrugated tube 5 is inserted from the second end of the rod body 2 at the right-hand thread. One end of the corrugated tube 5 is connected to the bottom of the adjusting ball pad 4, and the other end of the corrugated tube 5 abuts against the end face of the anti-loosening nut 6. The anti-loosening nut 6 is screwed onto the second end of the rod body 2.

[0024] This utility model embodiment solves the problem of cumbersome construction steps for anchor bolts in coal mine roadways or tunnels by setting up a rod body 2, a drill bit 1, a tray 3, a corrugated pipe 5 and an anti-loosening nut 6, and setting a liquid outlet hole in the drill bit 1. It simplifies the anchor bolt construction steps, reduces costs, improves work efficiency, and realizes the completion of anchor bolt construction drilling, hole washing, grouting and pre-tightening in one go, and has the performance of resisting impact ground pressure.

[0025] Specifically, in this embodiment of the invention, a liquid outlet hole is provided in the drill bit 1 to facilitate water flow and to facilitate anchoring with liquid anchoring agent.

[0026] This embodiment of the invention incorporates a corrugated pipe 5, which possesses sufficient strength exceeding the preload, enabling it to absorb energy and resist impacts. This allows the anchor bolts to be applied in mines with a high risk of rockburst. The corrugated pipe 5 absorbs some of the rockburst energy. The flared end of the corrugated pipe 5 abuts against the anti-loosening nut 6. When the rockburst pressure is high, the corrugated pipe 5 compresses, further absorbing energy and preventing impact. Simultaneously, the corrugated pipe 5 also functions as a mine pressure indicator. Given a fixed strength for each section of the corrugated pipe, the degree of compression can be used to determine the intensity of the rockburst, allowing for timely reinforcement or pressure relief in roadways severely affected by rockburst. It should be noted that the corrugated pipe is intended for roadways with rockburst potential; it is not necessary for roadways without rockburst.

[0027] This utility model embodiment uses a threaded connection or welding between the drill bit 1 and the rod body 2. When drilling in areas with high rock hardness coefficients, the use of a threaded connection can prevent the welded joint of the drill bit 1 from breaking off.

[0028] This embodiment of the invention achieves drilling and pre-tightening functions by setting an anti-loosening nut 6 at the tail of the rod 2. Turning the anchor rod to the left is forward rotation; the anti-loosening nut 6 drives the rod 2 to turn left to achieve the drilling function. Reversing the anti-loosening nut 6 to the right moves it upwards on the rod 2 to achieve the pre-tightening function.

[0029] This embodiment of the invention uses an adjusting ball pad 4 to connect the tray 3, allowing the tray 3 to fit snugly against the rock surface at the top of the tunnel, thus providing pre-tensioning and load-bearing functions. It should be noted that a certain angle may form between the anchor bolt and the rock surface; in this case, the adjusting ball pad 4 can be used to fine-tune the tilt angle of the tray 3, and the adjusting ball pad 4 also acts as a buffer for the tray 3.

[0030] Furthermore, products with different strength specifications can be produced according to demand.

[0031] Furthermore, the tilting ball pad 4 and the wave tube 5 can be fixedly connected or abut against each other.

[0032] In some embodiments, such as Figure 2 As shown, the anti-loosening nut 6 includes an outer nut and a conical nut 7. The outer nut and the conical nut 7 are respectively screwed into a right-hand thread. The screw hole of the outer nut includes a straight screw hole and a conical hole that are connected. The conical hole is located below the straight screw hole. The conical nut 7 is located inside the conical hole and the upper end of the conical nut 7 abuts against the inclined surface of the conical hole.

[0033] The tapered nut 7 is screwed upwards into the tapered hole of the outer nut from the bottom. During drilling, the tapered nut 7 restricts the outer nut from turning left and downwards through friction self-locking, thereby driving the rod 2 to turn left to drill the hole. After drilling is completed, the outer nut turns right and moves upwards to achieve the pre-tightening function.

[0034] Furthermore, the tapered nut 7 can be replaced with a straight nut or other nuts of similar shape that can achieve the same effect.

[0035] In some embodiments, such as Figure 2 As shown, the angle of inclination between the inclined surface of the tapered hole and the horizontal plane is smaller than the angle of inclination of the inclined surface of the tapered nut 7. This causes the tapered nut 7 to press against the inclined surface of the tapered hole, increasing the locking force between the tapered nut 7 and the outer nut.

[0036] In some embodiments, the rod body 2 is provided with a spiral rib 21. The spiral rib 21 is formed on the rod body by cold rolling or hot rolling technology. The spiral rib 21 forms a spiral rib pattern on the outside of the rod body, which facilitates the outward discharge of powder during drilling and facilitates the bonding of the anchoring agent to the wall during anchoring.

[0037] Furthermore, the spiral ribs 21 can be distributed throughout the entire rod 2, or they can be set locally on the rod, for example, only in the front half, middle section, or rear half of the rod 2, and can be designed according to actual needs.

[0038] Furthermore, the spiral rib 21 is processed by cold rolling or hot rolling, which can increase the elongation of the anchor bolt and prevent the anchor bolt from being broken by impact pressure.

[0039] In some embodiments, such as Figure 2 As shown, the outer nut is a stepped nut, including a first nut part 61 and a second nut part 62. The first nut part 61 and the second nut part 62 are integrally formed. The first nut part 61 is located above the second nut part 62. The outer diameter of the first nut part 61 is larger than the outer diameter of the second nut part 62. The straight threaded hole and the tapered hole are both located inside the first nut part 61.

[0040] In some embodiments, the cross-section of the second nut portion 62 is circular, hexagonal, or other shapes.

[0041] In some embodiments, such as Figure 2 As shown, the tapered nut 7 has a wide end and a narrow end along the axial direction, and the narrow end of the tapered nut 7 has a contraction groove 71. This facilitates the mutual locking between the tapered nut 7 and the outer nut.

[0042] Furthermore, the number of shrinkage grooves 71 can be one or more, and the size of the shrinkage grooves 71 can be designed according to the actual situation.

[0043] In some embodiments, such as Figure 3 As shown, tray 3 is a butterfly tray 3, a flat tray 3, or other shapes.

[0044] In some embodiments, such as Figure 2 As shown, the edge of the upper end face of the first nut part 61 is rounded.

[0045] In some embodiments, a mixing mechanism is provided within the liquid inlet. This allows for thorough mixing and reaction of the anchoring agent.

[0046] Furthermore, the mixing mechanism is an auger. This allows for self-mixing of the anchoring agent, eliminating the need for additional drive devices such as motors.

[0047] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model.

[0048] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0049] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," 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 utility model according to the specific circumstances.

[0050] In this utility model, 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," "on top of," and "over" 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.

[0051] In this utility model, 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 this utility model. 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.

[0052] 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. A drill-anchor-injection integrated energy-absorbing and pressure-relieving anchor bolt, characterized in that, include: The rod body has a hollow cavity along the axial direction inside. The rod body has a first end and a second end along the axial direction. The first end of the rod body has a left-hand thread, and the second end of the rod body has a right-hand thread. The second end of the rod body has a liquid inlet hole. A drill bit is connected to the first end of the rod body by a thread or welding. The drill bit has a liquid outlet hole along the axial direction, and the liquid outlet hole is connected to the hollow cavity of the rod body. The tray has a through hole in the center, the diameter of which is larger than the outer diameter of the rod. The tray is inserted into the second end of the rod and secured to the right-hand thread by an adjusting ball pad. A wave tube is fitted onto the right-hand thread from the second end of the rod body. One end of the wave tube is connected to the bottom of the tilting ball pad, and the other end of the wave tube abuts against the end face of the anti-loosening nut, which is screwed onto the second end of the rod body.

2. The integrated drill-anchor-injection energy-absorbing and pressure-relieving anchor bolt according to claim 1, characterized in that, The anti-loosening nut includes an outer nut and a tapered nut. The outer nut and the tapered nut are respectively screwed into the right-hand thread. The screw hole of the outer nut includes a straight screw hole and a tapered hole that are connected. The tapered hole is located below the straight screw hole. The tapered nut is located inside the tapered hole and the upper end of the tapered nut abuts against the inclined surface of the tapered hole.

3. The integrated drill-anchor-injection energy-absorbing and pressure-relieving anchor bolt according to claim 2, characterized in that, The angle of inclination between the inclined surface of the tapered hole and the horizontal plane is smaller than the angle of inclination of the inclined surface of the tapered nut.

4. The integrated drill-anchor-injection energy-absorbing and pressure-relieving anchor bolt according to claim 1, characterized in that, The rod body is provided with helical ribs.

5. The integrated drill-anchor-injection energy-absorbing and pressure-relieving anchor bolt according to claim 2, characterized in that, The outer nut is a stepped nut, comprising a first nut portion and a second nut portion, which are integrally formed. The first nut portion is located above the second nut portion, and the outer diameter of the first nut portion is larger than the outer diameter of the second nut portion. Both the straight threaded hole and the tapered hole are located inside the first nut portion.

6. The integrated drill-anchor-injection energy-absorbing and pressure-relieving anchor bolt according to claim 5, characterized in that, The cross-section of the second nut portion is circular or regular hexagonal.

7. The integrated drill-anchor-injection energy-absorbing and pressure-relieving anchor bolt according to claim 2, characterized in that, The tapered nut has a wide end and a narrow end along the axial direction, and the narrow end of the tapered nut has a contraction groove.

8. The integrated drill-anchor-injection energy-absorbing and pressure-relieving anchor bolt according to claim 1, characterized in that, The tray is either a butterfly tray or a flat tray.

9. The integrated drill-anchor-injection energy-absorbing and pressure-relieving anchor bolt according to claim 5, characterized in that, The edge of the upper end face of the first nut part is rounded.

10. The integrated drill-anchor-injection energy-absorbing and pressure-relieving anchor bolt according to claim 9, characterized in that, The liquid inlet is equipped with a mixing mechanism.

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