CN111878133A - Integrated resin anchor rod assembly and mounting method thereof - Google Patents

Abstract

The invention discloses an integrated resin anchor rod assembly and an installation method thereof. The anchor rod assembly comprises: a hollow rod body, a slurry stopper, a backing plate, a spherical nut and a push-out device. Resin anchoring agent and sealing piston, the sealing piston comprises bolts, nuts and large and small sealing washers, the sealing washer and the inner wall of the hollow rod adopt interference fit. Compared with the prior art, the positive effect of the present invention is: the present invention realizes the complete delivery of the resin anchoring agent to the predetermined position through the cooperation of the thrust ring, the sealing piston and the pushing device, so as to ensure the best anchoring effect. In addition, the structure is simple and the cost is low; the spherical nut of the present invention can be used for two purposes, making the bolt installation process more simple and convenient;

Description

Integrated resin anchor rod assembly and installation method thereof

technical field

The invention relates to an integrated resin anchor rod assembly and an installation method thereof.

Background technique

At present, when the resin bolt is actually used, the installation sequence is: after drilling the hole, manually install the anchoring agent into the hole, then drive the bolt body to rotate and stir the coil through the bolt drill to realize the anchoring, and then screw the nut to pre-tighten the bolt. Due to factors such as many resin coils, poor hole formation on the top plate, and low torque of the machine tool, the bolt is easy to fail during installation; at the same time, the interface between the rotating bolt body and the screw nut is inconsistent, and the interface needs to be replaced. The overall installation process is many, the operation is complicated and time-consuming, and it is difficult for workers to operate.

There is also an integrated resin anchor rod, which uses air pressure or water pressure to push out the resin anchoring agent inside the hollow rod body, but in actual use, the air pressure or water pressure and the hollow rod body have poor sealing performance, which is easy to release pressure, resulting in insufficient thrust and unable to remove the resin. The anchoring agent is pushed out; or the sealing performance of the piston is insufficient, causing water to penetrate into the resin anchoring agent and reducing the anchoring performance.

SUMMARY OF THE INVENTION

In order to overcome the above shortcomings of the prior art, the present invention proposes an integrated resin anchor rod assembly and an installation method thereof.

The technical solution adopted by the present invention to solve the technical problem is: an integrated resin anchor rod assembly, comprising: a hollow rod body, a slurry stopper, a backing plate, a spherical nut and a push-out device, and thrusts are sequentially arranged in the hollow rod body A ring, a resin anchoring agent and a sealing piston, the sealing piston includes bolts, nuts and large and small sealing washers, the sealing washer and the inner wall of the hollow rod adopt interference fit.

The present invention also provides an integrated resin anchor rod installation method, comprising the following steps:

Step 1. After forming the hole, send the anchor rod to the top of the anchor hole and fix it;

Step 2, using a push-out device to push out the resin anchoring agent, and at the same time using the anchor trolley mechanical arm to rotate the spherical nut to fully mix the resin anchoring agent;

Step 3: After the resin anchoring agent is solidified, rotate the spherical nut and push it forward at the same time, break through the tail of the spherical nut to make it screw in, and pre-tighten the anchor rod to complete the installation.

Compared with the prior art, the positive effects of the present invention are:

(1) The present invention realizes the complete delivery of the resin anchoring agent to the predetermined position through the cooperation of the thrust ring, the sealing piston and the push-out device, so as to ensure the best anchoring effect, and the structure is simple and the cost is low;

(2) The spherical nut of the present invention can be used for two purposes, making the bolt installation process simpler and more convenient;

(3) The pushing device of the present invention occupies a small space and is very convenient to use in the narrow environment of the coal mine roadway.

Description of drawings

The invention will be described by way of example and with reference to the accompanying drawings, in which:

Figure 1 is an overall diagram of an integrated resin anchor;

Fig. 2 is the structural representation of the integrated resin bolt;

Fig. 3 is the structural representation of sealing piston;

Figure 4 is a schematic structural diagram of a thrust ring;

Fig. 5 is the structural representation of spherical nut;

Fig. 6 is the structural representation of the push-out device;

Figure 7 is a schematic diagram of the push rod working.

Detailed ways

An integrated resin anchor rod assembly, as shown in Figure 1, includes: a thrust ring 1, a resin anchoring agent 2, a hollow rod body 3, a sealing piston 4, a slurry stopper 5, a backing plate 6, a spherical nut 7, and a roller set 8. Wire rope 9, winding drum 10, etc., of which:

The structure of the integrated resin anchor rod is shown in FIG. 2 , including: a thrust ring 1 , a resin anchoring agent 2 , a hollow rod body 3 , a sealing piston 4 , a slurry stopper 5 , a backing plate 6 , and a spherical nut 7 .

The structural design features of the main components of the integrated resin bolt are described in detail as follows:

(1) Structure design of hollow rod body 3

The existing hollow rod body has corrugated threads inside due to the processing technology, which is not conducive to sealing; and if only the thread at the end of the spherical nut is processed, the wave thread is not processed at the anchoring end, which will cause the resin anchoring agent and the hollow rod body. Decreased performance, resulting in lower anchoring force.

The new processing technology is adopted, so that the outside is all corrugated threads, and the inside is straight through holes, which can not only ensure good sealing performance but also ensure sufficient anchoring force.

(2) Structural design of sealing piston 4

The sealing piston structure is shown in Figure 3, including: nut 41, small sealing washer 42, nut washer 43, large sealing washer 44, bolt 45, wherein: two nuts 41 are arranged side by side on the bolt 45, and between the two nuts A small sealing washer 42 is arranged between, a nut washer 43 is arranged between the small sealing washer 42 and the second nut, and a large sealing washer 44 is arranged between the large end of the bolt 45 and the nut.

Because the sealing washer and the inner wall of the hollow rod adopt an interference fit, and a sealing piston is equipped with two sealing washers, one large and one small. Among them, the large dense washer is located at the back, and its main function is to seal, and the small dense washer is located in the middle, and its function is to keep the sealing piston centered and auxiliary sealing. This ensures the sealing performance of the sealing piston in a static state; when the sealing piston is moving, since the outer diameter of the sealing washer is larger than the inner diameter of the anchor rod, the excess part of the sealing washer is turned outwards, ensuring that the sealing piston still has good sealing performance during movement. The tightness can prevent the resin anchoring agent from flowing back after being broken, and ensure that the resin anchoring agent all enters the gap between the bolt body and the anchor hole.

At the same time, except for the sealing gasket, the sealing piston adopts the national standard parts, which is convenient to assemble and has low manufacturing cost.

(3) Structural design of thrust ring 1

The structure of the thrust ring is shown in FIG. 4 , its main body is an iron ring 11 , and three or four blades 12 are arranged on the iron ring. The blade has a certain sharp edge, so that it will not cut the resin anchoring agent during the transportation and storage of the resin anchor rod, but can easily and effectively pierce the resin anchoring agent when the sealing piston pushes out the resin anchoring agent.

At the same time, the blade can also prevent the sealing piston from being pushed out of the hollow rod.

(4) Structural design of spherical nut 7

The structure diagram of the spherical nut is shown in Figure 5. The existing spherical nut is all threaded through, while the spherical nut of the present invention has a thickness of 2 mm at the tail and is not threaded. Large through hole 71.

The advantages are as follows: After assembly, the resin anchoring agent and the sealing piston can be prevented from leaking from one end of the spherical nut.

At the same time, during installation, the mechanical arm of the anchor trolley only twists the spherical nut and does not move forward, so that the spherical nut will not be screwed forward due to the hindrance of the tail, but will drive the hollow rod to rotate, so as to realize the function of stirring resin anchoring agent . After the resin anchoring agent is solidified, the manipulator moves forward while screwing the spherical nut, breaking through the tail of the spherical nut, making the spherical nut move forward, and realizing the function of pre-tightening the hollow rod body.

(6) Design of push-out device

The structure of the push-out device is shown in Figure 6. The flexible steel cable 9 is used. The motor drives the roller group 8 to send the steel cable 9 into the hollow rod body, pushes the piston and the resin anchoring agent. After reaching the position, the roller group clamps the steel cable to prevent its slipped. After the hollow rod body is pre-tightened, the roller group loosens the wire rope, and the motor drives the winding drum 10 to retract the wire rope.

The push-out device takes up little space and is very suitable for use in the narrow environment of coal mine tunnels.

The support process of the present invention is as follows:

After the hole is formed, the anchor rod is sent to the top of the anchor hole and fixed. At this time, the steel cable 9 is used to push out the resin anchoring agent. The working process of the push rod is shown in Figure 7.

The resin anchoring agent 2 is broken under the action of the thrust ring 1, the sealing piston 4 and the wire rope 9; the spherical nut is rotated while being pushed out to fully mix the resin anchoring agent.

Wait for two minutes, and after the resin anchoring agent solidifies, rotate the spherical nut and push it forward at the same time, break through the tail of the spherical nut to make it screw in, and pre-tighten the anchor rod to complete the installation.

Claims (6)

1. An integrated resin anchor rod assembly is characterized in that: comprising: a hollow rod body, a pulp stopper, a backing plate, a spherical nut and a push-out device, and a thrust ring, a resin anchoring agent and a seal are sequentially arranged in the hollow rod body The sealing piston comprises bolts, nuts and large and small sealing washers, and the sealing washers and the inner wall of the hollow rod adopt interference fit. 2 . The integrated resin bolt assembly according to claim 1 , wherein the push-out device comprises a roller set, a wire rope and a wire reel, one end of the wire rope is wound around the wire reel, and the other end passes through the wire reel. 3 . The roller group is sent into the hollow rod body to push the sealing piston. 3 . The integrated resin anchor rod assembly according to claim 1 , wherein the hollow rod body is full of corrugated threads on the outside, and straight through holes on the inside. 4 . 4 . The integrated resin bolt assembly according to claim 1 , wherein the main body of the thrust ring is an iron ring, and a blade is fixed on the iron ring. 5 . 5 . The integrated resin anchor rod assembly according to claim 1 , wherein a through hole with a diameter smaller than the inner diameter of the hollow rod is provided at the tail of the spherical nut. 6 . 6. An integrated resin anchor rod installation method, characterized in that: comprising the following steps: Step 1. After forming the hole, send the anchor rod to the top of the anchor hole and fix it; Step 2, using a push-out device to push out the resin anchoring agent, and at the same time using the anchor trolley mechanical arm to rotate the spherical nut to fully mix the resin anchoring agent; Step 3: After the resin anchoring agent is solidified, rotate the spherical nut and push it forward at the same time, break through the tail of the spherical nut to make it screw in, and pre-tighten the anchor rod to complete the installation.

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