Coal mine main shaft prevent heavy bucket lowering protection device

Abstract

A mine main shaft protection device capable of preventing a heavy skip from downward falling comprises a shaft and the skip provided with a coaling opening and a unloading door and is characterized in that a protective box is fixed to the outer wall of the shaft, a fixed frame, a laser sensor and a control circuit board are arranged in the protective box, the laser sensor is arranged on the fixed frame, a laser transmission hole is formed in the wall of the shaft, a transmitting and receiving probe of the laser sensor is arranged in the laser transmission hole, and the coaling opening formed in the wall of the skip is used as the transmission route of a laser bundle. The mine main shaft protection device has the advantages of being suitable for any coal mine elevating electric control system which utilizes the skip, capable of accurately monitoring the true changing condition of the coal level in the skip, accurate in detection, high in safety and reliability, capable of normally working in places where much dust is produced when main shaft skip unloading is conducted, suitable for the complex electromagnetic environment on a coal mine spot, stable in motion, easy to inhaul and maintain, and capable of effectively preventing the heavy skip from downward falling, eradicating occurrence of heavy skip downward-falling accidents and guaranteeing safe elevating of a main shaft.

Description

technical field [0001] The invention relates to a safety protection device for an electric control system of a hoist in a main shaft of a coal mine, in particular to a protection device for preventing the lowering of a heavy bucket in a main shaft. Background technique [0002] In the process of coal mine production, the main shaft is likened to the throat of the human body in the entire transportation and hoisting system because of its importance and particularity. [0003] With the continuous advancement of automation control technology for large-scale fixed equipment in coal mines, the safety requirements for the electrical control system of the hoist are very high. However, affected by the on-site environment and other unfavorable factors, the application of automatic control is often limited because of the possibility of unsafe conditions in a certain link. For example, in the unloading link of the hoist in the main shaft, affected by various factors such as coal quali...

AI Technical Summary

Problems solved by technology

However, it can be seen from its principle that when the figure 1 It is still possible to run the winch when the two coals shown are not fully unloaded

As a result, the protection device for preventing the lowering of the heavy bucket (coal slipping protection) cannot prevent the lowering of the heavy bucket, which may cause accidents when the heavy bucket is lowered.

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