Scraper conveyor load monitoring device and chain tension estimation method

Abstract

The invention discloses a scraper conveyor load monitoring device. The scraper conveyor load monitoring device comprises strain gauges, a half bridge circuit, a wireless signal transmitter, a power supply, a wireless signal receiver, a strain gauge retaining plate, pushing slide side channel steel, coal shoveling side channel steel, a middle plate, a bottom plate, a drive shaft and a hydraulic cylinder, wherein the middle plates is provided with two parallel transverse grooves, and the strain gauges are transversely adhered to the parallel transverse grooves. The invention further provides an on-load section chain tension estimation method. The method is characterized in that a signal is output through the half bridge circuit, the signal is wirelessly transmitted to a remote control center, the load of each middle groove of a scraper conveyor is calculated according to advance load calibration and a linear interpolation method to obtain the difference of chain tension on two sides of the middle grooves, and on-load section chain tension distribution is calculated according to drive shaft torque and hydraulic cylinder pressure. The scraper conveyor load monitoring device and the on-load section chain tension estimation method have the advantages that the device is convenient in distributed load monitoring, on-load section chain tension can be estimated easily, a sensor is less prone to failure, sensor positioning is easy, the power supply can be replaced easily, and the like.

Description

technical field [0001] The invention relates to a load monitoring device and a chain tension estimation method of a scraper conveyor, and is especially suitable for a load monitoring device and a chain tension estimation method of a loaded section of a scraper conveyor adopting automatic tensioning of a hydraulic cylinder. Background technique [0002] As the key equipment for mechanized coal mining in the fully mechanized mining face, the scraper conveyor undertakes the important tasks of transporting coal, providing the running track for the shearer, and providing the fulcrum for the hydraulic support. When the shearer and the scraper conveyor run in the same direction, if the amount of coal cut by the shearer per unit time suddenly increases, it will easily cause local accumulation of the load in the middle groove, increase the tension of the scraper chain, and reduce the load of the scraper chain. service life. If the load of the middle trough of the scraper conveyor ca...

AI Technical Summary

Problems solved by technology

The monitoring of the sprocket stress can reflect the driving force at the sprocket, but the sprocket is rotating, and the stress has periodic changes. At the same time, the monitoring of the sprocket stress is difficult to reflect the load distribution of the scraper conveyor and the change of the chain tension.

During the operation of the scraper chain, it is often eroded by coal dust and water seepage. Due to poor sealing, it is easy to cause the sensors installed in the scraper chain and the scraper to fail; in addition, the battery life of the wireless transmitter power supply is difficult to guarantee, but Due to the circular operation of the scraper chain, it is difficult to locate the replacement power supply

[0004] To sum up, the current load monitoring device for scraper conveyors has disadvantages such as difficult monitoring of distributed loads, difficult evaluation of chain tension in the loaded section, easy failure of sensors, difficult positioning, and difficult replacement of power supplies.

Images