Rope type flexible hoisting overspeed overtravel protection buffering braking system

Abstract

The invention discloses a rope flexible hoisting overspeed overwinding protection buffer braking system. A photoelectric encoder and / or an electromagnetic induction sensor of the system are / is connected with a computer control cabinet; the computer control cabinet is connected with a dynamic control cabinet of a clamping mechanism; the dynamic control cabinet is connected with a hoisting rope clamping mechanism, and the clamping mechanism is connected with a buffer device. If a hoisting machine runs with overspeed, mechanisms of the system can generate linkage action; finally the dynamic control cabinet controls the hoisting rope clamping mechanism, and allows the hoisting rope clamping mechanism to act on a press roll set so as to change the relative positions among the press roll set and clamp a hoisting wire rope passing through the press roll set; and the clamping mechanism is connected with a cross beam of the buffer device, thereby achieving the compulsory buffer braking of a hoisting container. The system is sensitive and reliable; and once the hoisting speed exceeds the set value, a loading mechanism (loading press roll set) acts immediately, so as to avoid the failure of a buffer braking device on the hoisting cycle terminal due to the fact that overspeed exceeds the applicable range of the speed, thereby preventing serious hoisting accidents caused by the overspeed overwinding, overspeed driving, and the like.

Description

technical field [0001] The present invention relates to the safety protection technology that plays a role when the speed exceeds the rated value during the operation of vertical and slope hoisting systems in mines or other industrial and civil projects, which may cause personnel and property losses, especially a kind of rope-type flexible hoisting overspeed and overwinding Protect the buffer braking system. Background technique [0002] At present, in order to ensure the safety of the mine hoisting system, the country has clearly stated in the "Safety Regulations for Coal Mine" and "Safety Regulations for Metallurgical Mine" that speed-limiting electrical switch protection must be installed, and anti-collision beams and overwinding buffer protection devices must be installed. . The hoist itself is also required to be equipped with a speed limit protection function. However, due to various factors such as brake failure, electrical signal or mechanical failure, static tensio...

AI Technical Summary

Problems solved by technology

Automatic power-off is to make the winch hoist lose its lifting power. When the tension difference of the hoisting wire ropes on both sides is very large, it will still cause the heavy side (full-loaded hoisting container) to accelerate downward, while the light side (empty-loaded hoisting container) will go up accordingly. dangerous

Therefore, it is necessary to cooperate with the simultaneous action of the winch brake; the braking force of the winch brake is applied to the drum of the winch, and friction braking is used; high-speed friction can easily cause a rapid rise in temperature and a rapid decrease in friction coefficient, resulting in brake failure

In actual accidents, the steel rim of the winch drum was burned until it turned blue and black and could not be braked, which eventually led to heavy losses.

However, in the overwind protection buffer device, the braking force can only be applied to the lifting container when the lifting container has been overwound and is close to the end of the lifting cycle, and then acts on the hoist through the lifting wire rope. At this time, the speed may have exceeded its ability to protect. range, causing the protection to fail

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