Integrated resin anchor assembly and installation method thereof

Abstract

The present invention discloses an integrated resin anchor assembly and an installation method thereof. The anchor assembly comprises: a hollow rod body, a slurry stopper, a pad, a spherical nut and a push-out device. A thrust ring, a resin anchor and a sealing piston are sequentially arranged in the hollow rod body. The sealing piston comprises a bolt, a nut and large and small sealing washers. The sealing washers are interference-fitted with the inner wall of the hollow rod body. Compared with the prior art, the present invention has the following positive effects: the present invention achieves complete delivery of the resin anchor to a predetermined position through the cooperation of the thrust ring, the sealing piston and the push-out device, thereby ensuring the best anchoring effect, and has a simple structure and low cost; the spherical nut of the present invention can serve two purposes, making the anchor installation process simpler and more convenient; the push-out device of the present invention occupies a small space and is very convenient to use in the narrow environment of coal mine tunnels.

Description

Technical Field

[0001] The invention relates to an integrated resin anchor rod assembly and an installation method thereof. Background Art

[0002] At present, the installation sequence of resin anchor rods in actual use is: after drilling the hole, manually install the anchoring agent into the hole, then use the anchor drill to drive the anchor rod body to rotate and stir the drug roll to achieve anchoring, and then screw the nut to pre-tighten the anchor rod. Due to factors such as too many resin drug rolls, poor top plate hole formation, and low torque of the machine, the anchor rod is prone to failure during installation; at the same time, the interface between the rotating anchor rod body and the screwing nut is inconsistent, and the interface needs to be replaced. The overall installation process is multi-step, the operation is complicated and time-consuming, and it is difficult for workers to operate.

[0003] There are also integrated resin anchor rods that use air pressure or water pressure to push the resin anchor out of the hollow rod body. However, in actual use, the joint between the air pressure or water pressure and the hollow rod body is poorly sealed, and pressure release is easy to result in insufficient thrust to push the resin anchor out; or the sealing performance of the piston is insufficient, causing water to penetrate into the resin anchor and reduce the anchoring performance. Summary of the invention

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the present invention proposes an integrated resin anchor assembly and an installation method thereof.

[0005] The technical solution adopted by the present invention to solve its technical problems is: an integrated resin anchor rod assembly, including: a hollow rod body, a slurry stop plug, a pad, a spherical nut and a push-out device, a thrust ring, a resin anchor and a sealing piston are arranged in sequence in the hollow rod body, the sealing piston includes a bolt, a nut and large and small sealing washers, and the sealing washers are interference fit with the inner wall of the hollow rod body.

[0006] The present invention also provides an integrated resin anchor installation method, comprising the following steps:

[0007] Step 1: After the hole is formed, the anchor rod is sent into the top of the anchor hole and fixed;

[0008] Step 2: Use the push-out device to push out the resin anchoring agent, and use the anchor trolley mechanical arm to rotate the ball nut to fully mix the resin anchoring agent;

[0009] Step 3: After the resin anchor solidifies, rotate the ball nut and push it forward at the same time to break through the tail of the ball nut and screw it in. Pre-tighten the anchor rod to complete the installation.

[0010] Compared with the prior art, the present invention has the following positive effects:

[0011] (1) The present invention achieves complete delivery of the resin anchoring agent to a predetermined position through the cooperation of the thrust ring, the sealing piston and the ejection device, thereby ensuring the best anchoring effect, and has a simple structure and low cost;

[0012] (2) The ball nut of the present invention can be used for two purposes, making the anchor installation process simpler and more convenient;

[0013] (3) The ejection device of the present invention occupies little space and is very convenient to use in the narrow environment of a coal mine tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will now be described by way of example with reference to the accompanying drawings, in which:

[0015] Figure 1 This is the overall diagram of the integrated resin anchor;

[0016] Figure 2 It is a schematic diagram of the structure of the integrated resin anchor;

[0017] Figure 3 It is a structural schematic diagram of the sealing piston;

[0018] Figure 4 A schematic diagram of the structure of the thrust ring;

[0019] Figure 5 It is a schematic diagram of the structure of a ball nut;

[0020] Figure 6 It is a schematic diagram of the structure of the ejection device;

[0021] Figure 7 This is a schematic diagram of the push rod working. DETAILED DESCRIPTION

[0022] An integrated resin anchor assembly, such as Figure 1 As shown, it includes: a thrust ring 1, a resin anchor 2, a hollow rod body 3, a sealing piston 4, a slurry stopper 5, a pad 6, a ball nut 7, a roller group 8, a steel cable 9, a winding drum 10, etc., wherein:

[0023] The structure of the integrated resin anchor is as follows: Figure 2 As shown, it includes: a thrust ring 1, a resin anchor 2, a hollow rod body 3, a sealing piston 4, a slurry stopper 5, a gasket 6, and a spherical nut 7.

[0024] The structural design features of the main components of the integrated resin anchor are described in detail below:

[0025] (1) Hollow rod 3 structure design

[0026] The existing hollow rod body has corrugated threads inside due to processing reasons, which is not conducive to sealing; and if only the threads at the end where the spherical nut is located are processed and the corrugated threads are not processed at the anchoring end, the bonding performance between the resin anchor and the hollow rod body will be reduced, thereby reducing the anchoring force.

[0027] The new processing technology is adopted to make the exterior of the product fully corrugated with thread and the interior with straight holes, which can ensure both good sealing and sufficient anchoring force.

[0028] (2) Structural design of sealing piston 4

[0029] Sealing piston structure Figure 3 As shown, it includes: a nut 41, a small sealing washer 42, a nut gasket 43, a large sealing washer 44, and a bolt 45, wherein: two nuts 41 are arranged in parallel on the bolt 45, a small sealing washer 42 is arranged between the two nuts, a nut gasket 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.

[0030] Since the sealing gasket and the inner wall of the hollow rod body are interference fit, and a sealing piston is equipped with two sealing gaskets, one large and one small. The large gasket is located at the back and its main function is sealing, while the small gasket is located in the middle and its function is to keep the sealing piston centered and assist in 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 gasket is larger than the inner diameter of the anchor rod body, the excess part of the sealing gasket turns outward, ensuring that the sealing piston still has good sealing performance when moving, preventing the resin anchor from flowing back after being broken, and ensuring that all the resin anchor enters the gap between the anchor rod body and the anchor hole.

[0031] At the same time, except for the sealing gasket, the sealing piston adopts national standard parts, which is easy to assemble and has low manufacturing cost.

[0032] (3) Structural design of thrust ring 1

[0033] Thrust ring structure Figure 4 As shown, the main body is an iron ring 11, on which are arranged three or four blades 12. The blades have a certain sharpness of the cutting edge, so that they will not scratch the resin anchor during the transportation and storage of the resin anchor, but can easily and effectively pierce the resin anchor when the sealing piston pushes out the resin anchor.

[0034] At the same time, the blade can also prevent the sealing piston from being pushed out of the hollow rod body.

[0035] (4) Structural design of ball nut 7

[0036] Spherical nut structure diagram Figure 5As shown, the existing spherical nuts are all threaded through, while the tail of the spherical nut of the present invention has a thickness of 2 mm and is not threaded, but is a through hole 71 which is slightly smaller than the inner diameter of the hollow rod and larger than the flexible steel cable.

[0037] Its advantages are as follows: after assembly, it can prevent the resin anchor and the sealing piston from leaking out from one end of the ball nut.

[0038] At the same time, during installation, the anchor trolley mechanical arm only screws the ball nut and does not move forward. In this way, the ball nut will not be screwed forward due to the obstruction of the tail, but it will drive the hollow rod body to rotate, thereby achieving the function of stirring the resin anchor. After the resin anchor solidifies, the mechanical arm moves forward while screwing the ball nut, breaking through the tail of the ball nut, and moving the ball nut forward to achieve the function of pre-tightening the hollow rod body.

[0039] (6) Design of ejection device

[0040] The structure of the ejection device is as follows Figure 6 As shown, a flexible steel cable 9 is used, and a motor drives a roller group 8 to send the steel cable 9 into the hollow rod body, push the piston and the resin anchor, and after reaching the position, the roller group clamps the steel cable to prevent it from slipping. After the hollow rod body is pre-tightened, the roller group releases the steel cable, and the motor drives the winding drum 10 to retract the steel cable.

[0041] The push-out device takes up little space and is very suitable for use in the narrow environment of coal mine tunnels.

[0042] The supporting process of the present invention is as follows:

[0043] After the hole is formed, the anchor rod is sent to the top of the anchor hole and fixed. At this time, the resin anchoring agent is pushed out by the steel cable 9. The working process of the push rod is as follows: Figure 7 shown.

[0044] The resin anchor 2 is broken under the action of the thrust ring 1, the sealing piston 4 and the steel cable 9; while being pushed out, the ball nut is rotated to fully mix the resin anchor.

[0045] Wait for two minutes for the resin anchor to solidify, then rotate the ball nut and push it forward at the same time to break through the tail of the ball nut and screw it in. The pre-tightened anchor rod is now installed.

Claims

1. An integrated resin anchor assembly, characterized in that: include: A hollow rod body, a slurry stopper, a pad, a spherical nut and an ejection device, wherein a thrust ring, a resin anchor and a sealing piston are sequentially arranged in the hollow rod body, and the sealing piston comprises a bolt, a nut and large and small sealing washers, wherein: two nuts are arranged in parallel on the bolt, a small sealing washers is arranged between the two nuts, a nut gasket is arranged between the small sealing washers and the second nut, a large sealing washers is arranged between the large end of the bolt and the nut, and the sealing washers are interference fit with the inner wall of the hollow rod body.

2. The integrated resin anchor assembly according to claim 1, characterized in that: The pushing device comprises a roller group, a steel cable and a winding drum. One end of the steel cable is wound around the winding drum, and the other end is sent into the hollow rod body through the roller group to push the sealing piston.

3. The integrated resin anchor assembly according to claim 1, characterized in that: The outside of the hollow rod body is completely corrugated threaded, and the inside is a straight hole passing through.

4. The integrated resin anchor assembly according to claim 1, characterized in that: The thrust ring body is an iron ring on which a blade is fixed.

5. The integrated resin anchor assembly according to claim 1, characterized in that: The tail of the spherical nut is provided with a through hole whose diameter is smaller than the inner diameter of the hollow rod body.

6. An integrated resin anchor installation method, characterized in that: The steps include: Step 1: After the hole is formed, the anchor rod is sent into the top of the anchor hole and fixed; Step 2: Use the push-out device to push out the resin anchoring agent, and use the anchor trolley mechanical arm to rotate the ball nut to fully mix the resin anchoring agent; Step 3: After the resin anchor solidifies, rotate the ball nut and push it forward at the same time to break through the tail of the ball nut and screw it in. Pre-tighten the anchor rod to complete the installation.

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