Device for preventing slippage of belt of belt conveyor

Abstract

The invention relates to the technical field of belt conveying, in particular to a device for preventing slippage of a belt driven by a variable frequency motor. The device comprises a first patch mounted on a driving wheel of a belt conveyor, a first proximity switch mounted on one side out of the driving wheel, a second patch mounted on a driven wheel of the belt conveyor, a second proximity switch mounted on one side out of the driven wheel, and a PLC control system; the first proximity switch and the second proximity switch are electrically connected with the PLC control system; and the PLC control system detects a real-time pulse frequency P1t of the first proximity switch and a real-time pulse frequency P2t of the second proximity switch. The device realizes protection on belt slippage, protects the driving wheel driven by the variable frequency motor, and can realize perfect protection.

Description

technical field [0001] The invention relates to the technical field of belt transmission, in particular to a device for preventing a belt driven by a variable frequency motor from slipping. Background technique [0002] The belt conveyor is the main equipment for mine transportation, and the slip protection of the belt conveyor can effectively prevent the belt from being worn out or even caught on fire after the belt conveyor slips. Because of the constant belt speed of the belt conveyor driven by industrial frequency, it is relatively easy to realize the slip protection. At present, there are two commonly used ways to realize skid protection: contact type and non-contact type. These two kinds of slipping protection are based on the constant speed of the belt and are adjusted at a certain constant speed. However, for the belt conveyor driven by the variable frequency motor, when the running speed of the belt drops, a slipping fault will be falsely reported. In fact, more a...

AI Technical Summary

Problems solved by technology

[0004] The working principle of the tape slip measuring device currently used in production is based on comparing the actual speed of the tape with the rated speed of the tape. When the actual speed is lower than a certain value of the rated speed, the slip protection will act and send an alarm or trip signal. However, once the rated speed of the tape machine is set, it cannot be changed during operation. If it is used for a tape machine driven by a variable frequency motor, when the frequency decreases and the belt speed decreases, it will be mistaken for slipping.

The slip protection device currently in use cannot provide slip protection during the period when the tape machine is most likely to slip when starting and braking.

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