Piston and anchor rod for preventing anchor agent from returning and method

Abstract

The invention discloses a piston and an anchor rod for preventing an anchor agent from returning and a method. The piston for preventing the anchor agent from returning comprises a bolt, a spring buckle, two sealing washers and nuts, wherein the spring buckle, the two sealing washers and the nuts are arranged on the bolt; the spring buckle is arranged at the tail end of the bolt; the first nut is arranged between the two sealing washers; and the second nut is arranged at the head of the bolt. The piston can prevent the anchor agent from flowing back into the rod and avoid the reduction of the anchoring length; the anchor agent is prevented from flowing back into the rod body by adopting the spring buckle, the structure is simple, and the effect is stable and reliable; double-layer sealing can effectively seal high-pressure water and keep the piston rod centered, so that the piston is prevented from being eccentric in the rod and influencing the use; a barb of the spring buckle is helpful to scratch the anchor agent in the stirring process of the anchor agent, so that the stirring effect of the anchor agent is improved; and the piston sealing structure adopts an isolated double-rubber flat washer, so that on the one hand, when the anchor rod is floating, the piston can be well matched with the inner hole of the rod body without influencing the sealing.

Description

technical field [0001] The invention relates to an anti-anchoring agent retreating piston, an anchor rod and a method. Background technique [0002] The structure of the existing built-in resin anchoring agent bolt assembly is as follows: figure 1 As shown, it includes: rubber plug 11, thrust ring 12, resin anchoring agent 13, rod body 14, sealing piston 15, disc tray 16, hex nut 17, etc. When anchoring, put the rod body 14 into the anchor hole, Use high-pressure water to push the sealing piston 15 in the rod body to push out the bagged resin anchoring agent 13 from the rod body, the anchoring agent enters the anchor hole, and then the drilling rig sleeve drives the anchor rod body to rotate and advance until it reaches the bottom of the anchor hole. The resin anchoring agent 13 is crushed and stirred while the anchor rod is advancing, and after the anchoring agent is solidified, the nut is tightened to complete the installation of the anchor rod. In the actual installatio...

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Problems solved by technology

[0003] In order to overcome the above-mentioned shortcomings of the prior art, the present invention proposes an anti-anchoring agent retraction piston, anchor rod and method to solve the problem of the reduction in anchorage length caused by the retraction of the piston during the anchoring process of the existing built-in resin anchoring agent anchor rod. small problem

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