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A Large Stroke Valve-Controlled Retrievable Hydraulic Yield Anchor

A technology of yielding bolts and large strokes, which is applied in the installation of bolts, mining equipment, earthwork drilling and mining, etc. It can solve the problems of small yielding strokes and one-time damage, and achieve the effect of large yielding displacement

Active Publication Date: 2022-05-20
NANTONG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the existing physical yielding bolts have a small yielding stroke and a physical damping structure with one-time destruction, etc., and there are certain reliability and adaptability problems.

Method used

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  • A Large Stroke Valve-Controlled Retrievable Hydraulic Yield Anchor
  • A Large Stroke Valve-Controlled Retrievable Hydraulic Yield Anchor
  • A Large Stroke Valve-Controlled Retrievable Hydraulic Yield Anchor

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Embodiment Construction

[0014] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0015] Such as Figure 1 to Figure 5 As shown, a large-stroke valve-controlled recoverable hydraulic pressure relief anchor rod includes a hydraulic sleeve 10, a pull-out end cover 20, an anchor end cover 40, a piston body 50, a piston rod 60 and a valve control component 70. The sleeve 10 is arranged vertically, the pull-out end cap 20 and the anchor end cap 40 are respectively fixed on the upper and lower ends of the hydraulic sleeve 10, and the center of the pull-out end cap 20 is provided with a circular through-hole 20a, so The piston body 50 is slidably arranged inside the hydraulic sleeve 10, the hydraulic sleeve 10 is filled with hydraulic oil above the piston body 50, and the piston rod 60 vertically passes through the through-hole 20a an...

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Abstract

The invention discloses a large-stroke valve-controlled recoverable hydraulic yielding bolt, which relates to the technical field of geotechnical engineering and includes a hydraulic sleeve, a pull-out end cover, an anchoring end cover, a piston body, a piston rod and a valve control component. The hydraulic sleeve is filled with hydraulic oil above the piston body. The piston rod passes through the through hole vertically and is connected with the piston body. There is a cylindrical through groove on the piston body. Including lifting sheet, compression spring, blocking block, sealing block, pressure-bearing sheet and transfer tube. When the rock pressure increases and the piston rod is stretched, the pressure in the hydraulic chamber increases until the overflow channel is connected, and the hydraulic oil will be discharged through the overflow channel to complete a pressure relief. When the rock pressure is stable, The overflow channel is blocked again, making it resistant to rock pressure. Repeat many times to achieve the maximum pressure displacement.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a large-stroke valve-controlled recoverable hydraulic yielding bolt. Background technique [0002] Yield anchors are generally called prestressed yield anchors. Simply put, they are a support and protection tool used to increase the binding force on rocks. They are mainly used in high-strength support for large deformation roadways in high ground pressure mines. . [0003] At present, the existing physical yielding bolts have a small yielding stroke and a physical damping structure with one-time destruction, etc., and there are certain reliability and adaptability problems. Contents of the invention [0004] The object of the present invention is to provide a large-stroke valve-controlled recoverable hydraulic pressure relief bolt to solve the above-mentioned defects caused by the prior art. [0005] A large-stroke valve-controlled recoverable hydraulic press...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D21/00
CPCE21D21/008E21D21/0093E21D21/0026E21D21/00
Inventor 王海超姜大志李世荣姜佩弦周默超彭胜男
Owner NANTONG INST OF TECH