Full-thread anchor rod pre-tightening force exerting device capable of achieving automatic anchor unloading and operation method

Abstract

The invention discloses a full-thread anchor rod pre-tightening force exerting device capable of achieving automatic anchor unloading and an operation method. The full-thread anchor rod pre-tightening force exerting device comprises a front transverse beam, a rear transverse beam and an anchor unloading device for clamping and releasing an anchor rod, the front transverse beam and the rear transverse beam are respectively connected with two hydraulic telescopic oil cylinder supporting columns, the middle of the front transverse beam is provided with a cone-shaped nut, and the end portion of the cone-shaped nut is provided with a sleeve which is movably matched with the anchor unloading device; the front transverse beam is attached to a tray of the anchor rod; the rear transverse beam is matched with the anchor unloading device; the middle of the rear transverse beam is matched with the anchor unloading device, the telescopic oil cylinder supporting columns are driven by a pneumatic oil pressure pump, and the output end of the pneumatic oil pressure pump is connected with a controller. The full-thread anchor rod pre-tightening force exerting device achieves automatic anchor unloading, is convenient to operate and use, high in pre-tightening force exerting efficiency, and beneficial to giving full play to supporting potential of the high-strength full-thread anchor rod, and guarantees safe and efficient production of coal mine enterprises.

Description

[0001] technical field [0002] The invention relates to the field of mine bolt support, in particular to a fully threaded bolt pretightening force application device and an operation method capable of automatically withdrawing the anchor. Background technique [0003] With the development of the national economy, the country's energy demand is increasing day by day, and the depletion of shallow coal resources forces coal mining to go deep. Under the conditions of deep high ground stress, high ground temperature, high karst water pressure and strong mining, roadway support faces many new challenges. Bolts play an important role in the mine support system. In order to meet various practical needs, the performance and technology of bolts are constantly being updated, and the types of bolts are also emerging in endlessly. For example, the bolts used in mine shaft engineering include ordinary Round steel anchors, twist anchors, ribbed threaded steel anchors, fully threaded anch...

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to solve the problem of low torque conversion coefficient, easy deformation of the thread and difficulty in withdrawing the anchor, low and unquantifiable pre-tightening force applied value, low pre-tightening force after the side of the pre-tightening force, etc. Due to the problems of difficult secondary application, complex construction technology, and high labor intensity, a fully threaded bolt pretightening force application device and operation method that can automatically withdraw the anchor are proposed to fully utilize the mine bolt support potential and ensure safe and efficient mining of coal mines.

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