Large-stroke valve-controlled recoverable hydraulic yielding anchor rod
A technology of yielding bolts and large strokes, which is applied in the installation of bolts, mining equipment, earthwork drilling and mining, etc., can solve the problems of small yielding strokes and one-time damage, and achieve the effect of large yielding displacement
Active Publication Date: 2021-09-03
NANTONG INST OF TECH
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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.
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[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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The invention discloses a large-stroke valve-controlled recoverable hydraulic yielding anchor rod, and relates to the technical field of geotechnical engineering. The large-stroke valve-controlled recoverable hydraulic yielding anchor rod comprises a hydraulic sleeve, a pull-out end cover, an anchoring end cover, a piston body, a piston rod and a valve-controlled part, wherein the hydraulic sleeve is filled with hydraulic oil above the piston body, the piston rod vertically penetrates through a through opening and is connected with the piston body, a cylindrical through groove is formed in the piston body, and the valve-controlled part is arranged in the through groove and specifically comprises a lifting piece, a compression spring, a stop block, a sealing block, a pressure bearing piece and a transmission pipe. When the rock pressure is increased and the piston rod is tensioned, the pressure of a hydraulic chamber is increased until an overflow channel is in connection, the hydraulic oil is discharged through the overflow channel, one-time yielding is completed, and when the rock pressure is stable, the overflow channel is blocked again, so that the overflow channel has rock pressure resistance bearing capacity, and the maximum yielding displacement can be realized by repeating multiple times.
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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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