Mining telescopic anchor rod

Abstract

The utility model discloses a mining telescopic anchor rod which comprises a hollow rod body and a hexagonal rod body, the hollow rod body is a cylindrical pipe, a slurry mixing pipe and the hexagonal rod body are arranged in the hollow rod body, one end of the hexagonal rod body is upset to be used for limiting, and a drill bit is installed at the other end of the hexagonal rod body. The hollow rod body is connected with the hexagonal rod body through extrusion; and a self-locking mechanism is arranged at the tail end of the hollow rod body. The anchor rod is provided with the drill bit and can replace a drill rod for drilling; the rod body can actively extend so as to meet the construction requirements of narrow roadways; and a slurry mixing pipe is integrated inside, so that the pumped grouting type anchor rod anchoring agent can be uniformly mixed. And after drilling is completed, a pouring type anchor rod anchoring agent is pumped immediately, anchoring is completed, rod replacement and rod connection are not needed in the whole process, and the construction time is saved. According to the anchor rod, drilling and pre-tightening are achieved through the forward and reverse rotation function of a machine-mounted anchor rod drilling machine for a coal mine, extension of the rod body is achieved through the advancing and retreating function of the drilling machine, and dependence of the anchor rod on the equipment model is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of coal mine roadway anchoring support, specifically relates to a mine telescopic anchor rod, which helps to realize mechanized construction in the field of anchoring support. BACKGROUND

[0002] The tunneling footage of China has exceeded 13000km / year, and the anchoring support rate reaches more than 90%, with the use of a series of automatic construction equipment such as anchoring support drilling machines and drilling and anchoring integrated machines, the installation and construction of anchoring rods gradually change from manual support to mechanized construction, and hollow grouting anchoring rods and other automatic construction products are derived in the industry. According to research, the automatic anchoring rod products on the market are designed around large-section roadways, and the roadway design size meets the length support requirements of anchoring rods, but only more than 1000 intelligent mining working faces have been built in the country, and the remaining roadway excavation spaces basically cannot meet the working requirements of drilling and anchoring integrated machines, especially in the support construction of anchoring rods, customized modification of equipment or the use of joint rods are needed for construction. There is no self-drilling anchoring rod with elongation function on the market at present, which leads to the failure to realize automatic construction. CONTENT OF THE UTILITY MODEL

[0003] In order to overcome the above-mentioned shortcomings of the prior art, the utility model provides a mine telescopic anchor rod.

[0004] The utility model solves the technical problems thereof by adopting the technical scheme of a mine telescopic anchor rod, which comprises a hollow rod body and a hexagonal rod body, the hollow rod body is a cylindrical pipe, a grouting pipe and the hexagonal rod body are arranged in the hollow rod body, one end of the hexagonal rod body is upset for limiting, and the other end is provided with a drill bit; the hollow rod body and the hexagonal rod body are connected through extrusion; a self-locking mechanism is arranged at the end of the hollow rod body.

[0005] Further, a pressing ring is arranged at the extrusion matching position of the hollow rod body and the hexagonal rod body.

[0006] Further, two column pins are arranged at the upset end of the hexagonal rod body, and a spring is arranged between the two column pins.

[0007] Further, a limiting hole accommodating the two column pins is arranged on the inner wall of the end of the hollow rod body.

[0008] Further, threads are machined on the exposed end of the hollow rod body, and the grouting pipe is installed in the thread inner hole.

[0009] Further, the self-locking mechanism comprises a limiting ring and a hexagonal nut.

[0010] Further, the limiting ring is welded on the hollow rod body.

[0011] Further, the mixing pipe is a wheat-shaped mixing pipe.

[0012] Compared with the prior art, the anchor rod has the following advantages:

[0013] The anchor rod is provided with a drill bit, and can replace a drill rod for drilling; the rod body can be actively elongated to adapt to the construction requirement of a narrow roadway; the internal mixing pipe can uniformly mix the pumped grouting anchor rod anchoring agent; after drilling, the grouting anchor rod anchoring agent is immediately pumped in to complete anchoring, and the whole process does not need to change or connect rods, thereby saving construction time.

[0014] 1. The anchor rod is provided with a drill bit, and can replace a drill rod for drilling; the rod body can be actively elongated to adapt to the construction requirement of a narrow roadway; the internal mixing pipe can uniformly mix the pumped grouting anchor rod anchoring agent; after drilling, the grouting anchor rod anchoring agent is immediately pumped in to complete anchoring, and the whole process does not need to change or connect rods, thereby saving construction time.

[0015] 2. The anchor rod is provided with a drill bit, and can replace a drill rod for drilling; the rod body can be actively elongated to adapt to the construction requirement of a narrow roadway; the internal mixing pipe can uniformly mix the pumped grouting anchor rod anchoring agent; after drilling, the grouting anchor rod anchoring agent is immediately pumped in to complete anchoring, and the whole process does not need to change or connect rods, thereby saving construction time.

[0016] 3. The anchor rod is provided with a drill bit, and can replace a drill rod for drilling; the rod body can be actively elongated to adapt to the construction requirement of a narrow roadway; the internal mixing pipe can uniformly mix the pumped grouting anchor rod anchoring agent; after drilling, the grouting anchor rod anchoring agent is immediately pumped in to complete anchoring, and the whole process does not need to change or connect rods, thereby saving construction time.

[0017] 4. The anchor rod is provided with a drill bit, and can replace a drill rod for drilling; the rod body can be actively elongated to adapt to the construction requirement of a narrow roadway; the internal mixing pipe can uniformly mix the pumped grouting anchor rod anchoring agent; after drilling, the grouting anchor rod anchoring agent is immediately pumped in to complete anchoring, and the whole process does not need to change or connect rods, thereby saving construction time.

[0018] 5. The anchor rod is provided with a drill bit, and can replace a drill rod for drilling; the rod body can be actively elongated to adapt to the construction requirement of a narrow roadway; the internal mixing pipe can uniformly mix the pumped grouting anchor rod anchoring agent; after drilling, the grouting anchor rod anchoring agent is immediately pumped in to complete anchoring, and the whole process does not need to change or connect rods, thereby saving construction time. BRIEF DESCRIPTION OF DRAWINGS

[0019] The utility model will be through example and refer to the mode of the attached drawing, wherein:

[0020] Figure 1 It is the whole composition schematic view of the utility model;

[0021] Figure 2 This is a schematic diagram showing the position of the components in the retracted state of this utility model;

[0022] Figure 3 This is a schematic diagram showing the position of the components in the extended state of this utility model;

[0023] Figure 4 This is a schematic diagram of the channel through which the drilling water supply and injection anchoring agent of this utility model flows;

[0024] Figure 5 This is a schematic diagram of the self-locking mechanism of this utility model, wherein: (1) self-locking is formed; (2) self-locking is disengaged;

[0025] The attached diagram includes the following labels: 1. Mixing pipe; 2. Limiting ring; 3. Hexagonal nut; 4. Washer plate; 5. Hollow rod; 6. Pressure ring; 7. Hexagonal rod; 8. Drill bit; 9. Spring; 10. Pin. Detailed Implementation

[0026] A type of telescopic anchor bolt for mining, such as Figure 1 As shown, it includes: 1. grout mixing pipe; 2. limiting ring; 3. hexagonal nut; 4. washer; 5. hollow rod; 6. pressure ring; 7. hexagonal rod; 8. drill bit; 9. spring; 10. pin, etc., wherein:

[0027] The hollow rod 5 is made of seamless steel pipe, with threads machined on the exposed end for pre-tightening. A "cross-shaped" mixing pipe 1 is installed in the threaded inner hole for mixing the anchoring agent. The remaining part is left unmachined. The internal cavity accommodates the hexagonal anchoring section rod 7. The anchoring section rod is a hollow hexagonal rod, with one end upset for positioning and the other end fitted with a drill bit 8 for drilling. The regular hexagonal shape is used to transmit torque, and an internal hole supplies water for slag removal. The hollow rod 5 and the hexagonal anchoring section rod 7 are connected by extrusion. A pressure ring 6 is added at the extrusion fit to prevent the hexagonal rod 7 from being pulled out of the hollow rod 5. During operation, the hexagonal rod 7 is pushed or pulled out of the cavity of the hollow rod 5 by liquid, and then the pin 10 pops out and locks, allowing the rod to extend.

[0028] Figure 2 This is a schematic diagram of the position of the components in the retracted state of this utility model (the pad is not shown). The mixing pipe 1 is stuck in the internal thread of the hollow rod 5. The hexagonal rod 7 is built into the cavity of the hollow rod. The pin 10 is compressed at the end of the hexagonal rod 7. At this time, it is only necessary to supply high-pressure water or pull the hexagonal rod 7 outward to achieve elongation.

[0029] Figure 3 This is a schematic diagram of the position of the components in the extended state of this utility model (the pad is not shown). When the end of the hexagonal rod 7 travels to the position of the limiting hole opened on the inner wall of the end of the hollow rod, the pin 10 loses its limiting position and is popped out by the spring 9, and gets stuck between the hollow rod 5 and the hexagonal rod 7, thus restricting the retraction of the hexagonal rod 7 during subsequent drilling.

[0030] Figure 4 is the present utility model drills in for water, the flow path for showing of perfusion type anchor rod anchoring agent, water flow or pumping resin flows through mixing pipe 1, hollow rod body 5 inner chamber, hexagonal rod body 7 inner chamber and the water outlet hole of drill bit 8 reaches rock surface in turn;

[0031] Figure 5 is the present utility model self-locking mechanism structure schematic diagram, this part working principle is as follows: drive anchor rod drilling machine hydraulic motor positive rotation, hexagonal nut 3 retreat and abut against limit ring 2 (the left-hand thread of rod body processing) form self-locking, drive hollow rod body 5 rotation drilling, as shown in (1) of Figure 5 , drive hydraulic motor reverse rotation, hexagonal nut 3 along hollow rod body rotation drilling, disengage from the self-locking of limit ring 2, realize pre-tightening function, as shown in (2) of Figure 5 .

[0032] The construction technology of the anchor rod of the present utility model is:

[0033] 1) drilling preparation: the remaining accessories are assembled except the pad of rod body factory, place the anchor rod in the anchor rod drilling machine drill sleeve, and place the pad 4 in front of the support plate, then push the drilling machine to abut against the coal wall, at this time, deliver drilling cooling water, the water flows into the hole of rod body after mixing pipe, and is delivered to the position of drill bit;

[0034] 2) drilling: drive anchor rod drilling machine hydraulic motor positive rotation, drive hexagonal nut 3 retreat and abut against limit ring 2 (the left-hand thread of rod body exposed end processing) form self-locking, drive hollow rod body 5 rotation drilling;

[0035] 3) rod body elongation: first stage anchor rod drilling in place (hexagonal nut 3 is close to pad 4), at this time, drive the drilling machine to retreat and pass in high-pressure water flow, use the resistance of residual rock-soil in hole and water flow thrust to push out hexagonal rod body 7, after reaching the limit hole, column pin 10 is ejected, complete rod body elongation, continue to operate the drilling machine to cut drilling;

[0036] 4) ester injection: after anchor rod drilling in place, perfusion type anchor rod anchoring agent A, B component is pumped into drill sleeve along the axis of rotation (at this time, A, B liquid has not been mixed evenly), after perfusion type anchor rod anchoring agent is mixed fully through mixing pipe 1 arranged in anchor rod, flows into the bottom of anchor hole from hollow anchor rod inner hole, ester injection is completed;

[0037] 5) pre-tightening: after waiting for a period of time, drive hydraulic motor reverse rotation, at this time, because rod body has been anchored, hexagonal nut 3 cannot drive rod body to rotate, is forced to rotate in along rod body, realizes pre-tightening function (there is no activity space between nut and rock wall, in the process of driving nut rotation, rod body is pulled outwards, realizes pre-tightening).

Claims

1. A mining telescopic rock bolt, characterized in that: The hollow rod body is a cylindrical pipe, a mixed slurry pipe is arranged in the hollow rod body, and a hexagonal rod body is arranged in the hollow rod body, one end of the hexagonal rod body is upset for limiting, and the other end is provided with a drill bit; the hollow rod body and the hexagonal rod body are connected through extrusion; a self-locking mechanism is arranged at the end of the hollow rod body.

2. A telescopic mine anchor according to claim 1, characterised in that: A press ring is arranged at the extrusion matching position of the hollow rod body and the hexagonal rod body.

3. A telescopic mine anchor according to claim 1, characterised in that: Two column pins are arranged at the upset end of the hexagonal rod body, and a spring is arranged between the two column pins.

4. A telescopic mine anchor according to claim 3, characterised in that: A limiting hole for accommodating the two column pins is arranged on the inner wall of the end of the hollow rod body.

5. A telescopic mine anchor according to claim 1, characterised in that: A thread is machined on the exposed end of the hollow rod body, and the mixed slurry pipe is arranged in the thread inner hole.

6. A telescopic mine anchor according to claim 1, characterised in that: The self-locking mechanism comprises a limiting ring and a hexagonal nut.

7. A telescopic mine anchor according to claim 6, characterised in that: The limiting ring is welded on the hollow rod body.

8. A telescopic mine anchor according to claim 1, characterised in that: The mixed slurry pipe is a rice-shaped mixed slurry pipe.

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