Mining hydraulic pressure type hollow self-drilling anchor rod

Abstract

The utility model discloses a mining hydraulic hollow self-drilling anchor rod which comprises a hollow rod body, a self-locking mechanism arranged at the tail end of the hollow rod body, a drill bit arranged at the head of the hollow rod body, and a first piston, a second piston and an anchoring agent which are arranged in an inner cavity of an anchoring section of the hollow rod body, the first piston and the second piston are perforated in a staggered mode and arranged at intervals. By adopting the anchor rod and being matched with an onboard anchor rod drilling machine for a coal mine, drilling can be performed after the anchor rod is manually placed, an anchoring agent is immediately pushed out after drilling is completed, anchoring is completed, and manual intervention is not needed in the whole process; according to the anchor rod, automatic drilling and pre-tightening of the anchor rod can be achieved through the forward and reverse rotation function (forward rotation refers to right rotation facing the rock wall, and reverse rotation refers to left rotation facing the surrounding rock) of the onboard anchor rod drilling machine for the coal mine, resin anchoring agents are pushed out through high-pressure water, the procedures of drill rod dismounting, anchor rod mounting and anchor rod propelling in the traditional technology are omitted, and the production cost is reduced. And the construction process of the anchor rod is greatly optimized.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of coal mine roadway anchoring and supporting, and particularly relates to a mine water pressure type hollow self-drilling anchor rod, which helps to realize mechanized construction in the field of anchoring and supporting. BACKGROUND

[0002] Anchor rod support can effectively control the deformation of surrounding rock and is widely used in the fields of coal mines, metal mines and the like at home and abroad. Taking fast excavation support of a coal mine roadway as an example, 50 meters of the roadway can be excavated per day, about 14 sets of resin anchor rods are needed for support per 1 meter of excavation, and 700 sets of anchor rods need to be installed per day. The traditional manual support technology has a complicated construction process, and the process flow mainly includes the following 9 procedures: drill rod installation, step-by-step hole forming, drill rod dismounting, anchor agent loading, anchor rod loading, anchor rod advancing, anchor agent stirring, waiting for solidification and pre-tightening, and the anchor rod support cannot meet the requirements of excavation construction progress. In order to improve the efficiency of anchor rod support, a series of automatic construction equipment such as anchor rod support drilling machines and excavation-anchor integrated machines and the matching automatic anchor rods are developed. SUMMARY

[0003] In order to overcome the above-mentioned shortcomings of the prior art, the utility model provides a mine water pressure type hollow self-drilling anchor rod.

[0004] The utility model discloses a technical scheme that solves the technical problems: a mine water pressure type hollow self-drilling anchor rod, including hollow rod body and setting in the hollow rod body tail end's self locking mechanism, setting in the hollow rod body head's drill bit and setting in the hollow rod body anchoring section inner chamber's first piston, second piston and anchoring agent, first piston and second piston staggered hole and interval setting.

[0005] Further, the resistance increasing wire is arranged on the outside of the anchoring section of the hollow rod body.

[0006] Further, the resistance increasing wire is a metal spiral resistance increasing wire welded on the outside of the hollow rod body.

[0007] Further, a through hole is arranged in the center of the first piston, and a plurality of through holes are arranged on the outer ring of the second piston, and the through holes of the two are staggered.

[0008] Further, a plurality of through holes are arranged on the inner ring of the first piston, and a plurality of through holes are arranged on the outer ring of the second piston, and the through holes of the two are staggered.

[0009] Further, the self locking mechanism is a double nut self locking mechanism, including a self locking nut and a hexagonal nut.

[0010] Further, a conical seal is arranged at the end of the hollow rod body.

[0011] Further, left-handed threads are processed on the outer surface of the hollow rod body.

[0012] Further, the anchoring agent is wrapped with adhesive tape at both ends.

[0013] Compared with the prior art, the anchor rod has the following advantages:

[0014] The anchor rod is used with the machine-mounted anchor rod drill for coal mines, and the anchor rod can be placed manually and then drilled, and the anchoring agent is pushed out immediately after drilling to complete anchoring, and the whole process does not need manual intervention; the anchor rod can realize automatic drilling and pre-tightening by using the forward and reverse rotation functions of the machine-mounted anchor rod drill for coal mines (the forward rotation is right rotation facing the rock wall, and the reverse rotation is left rotation facing the surrounding rock), and the resin anchoring agent is pushed out by high-pressure water, so that the processes of disassembling the drill rod, loading the anchor rod and pushing the anchor rod in the traditional process are omitted, and the construction process of the anchor rod is greatly optimized.

[0015] 1. Compared with the traditional anchor rod, the hollow anchor rod is used to replace the solid rod body, the resin anchoring agent is integrated in the inner cavity of the rod body, water pressure is used as power to push out the resin anchoring agent, a drill bit is installed at the tail end for drilling, and the double-nut self-locking mode is used to realize driving of the rod body rotation and nut pre-tightening by using the forward and reverse rotation operations of the equipment, so that the product has the functions of drilling, anchoring and pre-tightening, and has the basis of automatic construction.

[0016] 2. The anchor rod uses a new piston pushing structure, a double-piston design is used, the pistons are staggered and arranged, water flow can pass normally in the low-pressure water supply process to realize drilling water supply, and the pistons are arranged in close contact in the high-pressure water supply process, at this time, the staggered drainage holes form a sealing condition, the pistons are automatically sealed and push out the resin anchoring agent under the pushing of high-pressure water flow. The resin anchoring agent is pushed and squeezed by high-pressure water, and the requirement for the construction equipment is greatly reduced.

[0017] 3. The anchor rod uses an increased resistance structure, the inner cavity of the hollow rod body needs to meet the sealing piston movement, and the outer surface of the rod body cannot be rolled to increase the friction pattern, so that the anchoring success rate is low. The anchor rod is welded with a metal spiral resistance wire on the outer side of the anchoring section rod body, which can make up for the defects of the smooth rod body in anchoring adhesion, increase the stirring effect of the anchoring agent, and significantly improve the anchoring success rate of the product.

[0018] 4. The anchor rod adopts a one-step construction process, the processes of disassembling the drill rod, loading the anchor rod and pushing the anchor rod in the traditional process are omitted, the construction process of the anchor rod is greatly optimized, the labor intensity of workers is reduced, the influence of hole collapse on construction is reduced, and the efficiency of support construction is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] The anchor rod will be illustrated by examples and with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the overall composition of this utility model;

[0021] Figure 2 for Figure 1 AA section view;

[0022] Figure 3 for Figure 1 BB section view;

[0023] Figure 4 This is a schematic diagram of the drilling water supply of this utility model;

[0024] Figure 5 This is a schematic diagram of the self-locking mechanism of this utility model, wherein: (1) is the state of forming a self-lock; and (2) is the state of disengaging from the self-lock.

[0025] Figure 6 This is a schematic diagram illustrating the introduction of the anchoring agent of this utility model;

[0026] The reference numerals in the figure include: 1. conical seal, 2. self-locking nut, 3. hexagonal nut, 4. washer, 5. resistance-increasing wire, 6. first piston, 7. second piston, 8. anchoring agent, 9. hollow rod, 10. drill bit, 11. high-pressure water. Detailed Implementation

[0027] A type of hydraulically operated hollow self-drilling anchor bolt for mining, such as Figure 1 As shown, it includes: a conical seal 1, a self-locking nut 2, a hexagonal nut 3, a washer 4, a resistance-increasing wire 5, a first piston 6, a second piston 7, an anchoring agent 8, a hollow rod body 9, and a drill bit 10, etc., wherein:

[0028] A self-locking nut 2, a hexagonal nut 3, and a washer 4 are sequentially fitted onto the tail end of the hollow rod 9, and a conical seal 1 is installed at the end of the hollow rod. A metal spiral resistance-increasing wire 5 is welded to the outside of the anchoring section of the hollow rod. A first piston 6, a second piston 7, and an anchoring agent 8 are sequentially installed inside the anchoring section of the hollow rod. A drill bit 10 is installed at the front end of the anchoring section of the hollow rod. A through hole is provided in the center of the first piston 6, and several through holes are provided on the outer ring of the second piston 7. The openings of the two pistons are staggered, such as... Figure 2 and Figure 3 As shown.

[0029] like Figure 4 As shown, the working principle of the drilling water supply of this utility model is as follows: During operation, drilling cooling water is supplied. The water flows through the inner hole of the rod body and flows to the position of the first piston 6. It passes through the center hole of the first piston 6 and flows out through the outer ring hole of the second piston 7, and is supplied to the position of the drill bit 10 (the water pressure is insufficient to drive the piston to move).

[0030] like Figure 5As shown in the self-locking mechanism working principle as follows: the driving anchor rod drill hydraulic motor positive rotation, drive hex nut 3 retreat and resist tight self-locking nut 2 (rod body processing left-hand thread), forming double nut self-locking, drive rod body rotation drilling, such as Figure 5 (1) shown; drive hydraulic motor reverse rotation, at this time the hex nut along the rod forward rotation into the self-locking nut, realize the pre-tightening function, such as Figure 5 (2) shown;

[0031] As shown in the self-locking mechanism working principle as follows: the driving anchor rod drill hydraulic motor positive rotation, drive hex nut 3 retreat and resist tight self-locking nut 2 (rod body processing left-hand thread), forming double nut self-locking, drive rod body rotation drilling, such as Figure 6 (1) shown; drive hydraulic motor reverse rotation, at this time the hex nut along the rod forward rotation into the self-locking nut, realize the pre-tightening function, such as

[0032] The utility model discloses a coal mine with machine -mounted anchor rod drill which is matched with the utility model, and the coal mine with machine -mounted anchor rod drill is composed of long feeding mechanism, short feeding mechanism, roof mechanism and slide assembly rotating mechanism, wherein: the roof mechanism is controlled by a single cylinder, and the roof mechanism is stretched and supported on the coal wall to be drilled when in use, and has the functions of stabilizing the anchor rod drill and supporting the rod; the long and short feeding oil cylinders are connected in parallel by two oil cylinders, are controlled by one way of hydraulic oil, the short feeding oil cylinder makes the rotary drill part slide on the square guide rail, and the long feeding oil cylinder makes the square guide rail slide on the slide assembly; the rotating mechanism is composed of a motor and a water jacket, transmits torque through an output shaft, the back sealing in the water jacket guarantees the sealing of the slag water and gas, and two bearings are used for offsetting the axial and radial loads.

[0033] The specific process flow is as follows:

[0034] 1) drilling preparation: the hollow rod body is shipped out of the tray (i.e. the base plate 4), and the remaining accessories are assembled, the anchor rod is placed in the anchor rod drill sleeve, then the tray is placed, the drill is pushed to the coal wall, at this time the drilling cooling water is supplied, the water flows through the hollow rod body hole, flows through the first piston 6, and flows out through the second piston 7, and is delivered to the position of the drill bit 10 (the water pressure is not enough to drive the piston to move);

[0035] 2) Drilling: drive the anchor rod drill hydraulic motor positive rotation, hex nut 3 retreat to close self-locking nut 2 (rod body processing left-hand thread), forming double nut self-locking, drive the rod body rotation drilling, cutting coal rock;

[0036] 3) Push out the anchoring agent: anchor rod drilling in place (hex nut 3 close to the pad 4, pad 4 close to the coal wall), at this time, high pressure water is input, the first piston 6 is impacted and moved, tightly sealed with the second piston 7, and moves together with the second piston to the drill bit 10 direction, the second piston 7 extrudes the resin anchoring agent 8 (the end buckle of the anchoring agent is removed in advance and wrapped with adhesive tape, which can be easily broken), the anchoring agent flows out through the slurry outlet hole at the position of the drill bit 10, and is anchored after stirring through the rod body;

[0037] 4) Pre-tightening: after waiting for a period of time, drive the hydraulic motor reverse rotation, at this time, since the hollow rod body 9 has been anchored, the hex nut 3 cannot drive the rod body to rotate, the hex nut 3 is separated from the self-locking and rotates along the rod body, realizing the pre-tightening function.

Claims

1. A mine water pressure type hollow self-drilling anchor rod, characterized in that: The hollow rod body, the self-locking mechanism arranged at the tail end of the hollow rod body, the drill bit arranged at the head of the hollow rod body, the first piston and the second piston arranged in the inner cavity of the anchoring segment of the hollow rod body, and the anchoring agent.

2. A mine water-pressured hollow self-drilling anchor rod according to claim 1, characterized in that: A resistance increasing wire is arranged outside the anchoring segment of the hollow rod body.

3. A mine water-pressured hollow self-drilling anchor rod according to claim 2, characterized in that: The resistance increasing wire is a metal spiral resistance increasing wire welded outside the hollow rod body.

4. The mine hydraulic hollow self-drilling anchor rod according to claim 1, characterized in that: A through hole is arranged at the center of the first piston, and a plurality of through holes are arranged at the outer ring of the second piston, and the through holes of the two are staggered.

5. The mine hydraulic hollow self-drilling anchor rod according to claim 1, characterized in that: A plurality of through holes are arranged at the inner ring of the first piston, and a plurality of through holes are arranged at the outer ring of the second piston, and the through holes of the two are staggered.

6. The mine hydraulic hollow self-drilling anchor rod according to claim 1, characterized in that: The self-locking mechanism is a double-nut self-locking mechanism, which comprises a self-locking nut and a hexagonal nut.

7. The mine hydraulic hollow self-drilling anchor rod according to claim 1, characterized in that: A tapered seal is arranged at the tail end of the hollow rod body.

8. A mine hydraulic hollow self-drilling anchor rod according to claim 7, characterized in that: A left-handed thread is processed on the outer surface of the hollow rod body.

9. The mine hydraulic hollow self-drilling anchor rod according to claim 1, characterized in that: The anchoring agent is wrapped with adhesive tape at both ends.

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