Anti-self-locking anchor-bolt support plate

Abstract

The invention provides an anti-self-locking anchor-bolt support plate. A self-aligning ball pad is arranged below an arched tray of the anchor-bolt support plate, the upper part of the self-aligning ball pad is provided with a central rotary component, and the internal rotary surface of the central rotary component and the external rotary surface of a circular arch part are cooperatively arranged. According to the invention, by adopting a design of cooperatively arranging the internal rotary surface of the central rotary component and the external rotary surface of the circular arch part, the occurrence of a phenomena that the self-aligning ball pad is self-locked because a stress generated by the downward bending of a steel belt acts on the self-aligning ball pad can be effectively prevented.

Description

technical field [0001] The invention relates to an anti-self-locking anchor supporting plate, in particular to an anchor supporting plate which can prevent the self-locking of self-aligning ball pads and is applied to the support system of underground roadways in coal mines. Background technique [0002] At present, the use of bolt support technology is the most common form of support for underground coal mine roadways in my country. And the bolt supporting plate is indispensable in the bolt support technology; figure 1 Among them is the most commonly used anchor supporting plate structure at present. The anchor supporting plate has a high-strength arched tray 101, and a steel belt 102 is arranged on the arched tray. The steel belt is provided with an anchor hole 103. An anchor rod 104 is provided in the anchor rod hole; a central rotating part 105 with a hole in the center is provided at the bottom of the arched tray, and a self-aligning ball pad 106 is installed in the ce...

AI Technical Summary

Problems solved by technology

The anchor supporting plate with the above structure can play a good role in supporting the underground roadway; however, the shortcomings of the anchor supporting plate of this structure are also quite obvious; it is mainly reflected in that when the steel belts on both sides of the anchor are When under pressure, a certain degree of deformation and bending will occur, forcing the anchor support plate at the lower end of the steel strip to squeeze against the central rotating part at the bottom, and the stress generated by the extrusion is transmitted to the outer rotating surface of the self-aligning ball pad through the inner rotating surface , and conduct through the self-aligning ball pad to the center line of the lower part of the anchor rod; eventually the self-aligning ball pad is stuck between the central rotating part of the anchor rod support plate and the anchor rod and cannot rotate, which is commonly referred to as self-locking phenomenon; the self-aligning ball pad immediately loses its function of adjusting the centerline position of the anchor rod and relieving the force on the lower part of the anchor rod; Damage, what's more, directly leads to the breakage of the anchor rod, which greatly reduces the service life of the anchor support plate

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