A tail chain tightening device for a scraper conveyor

Abstract

The invention discloses a scraper conveyor tail chain fastening device. The device comprises a steering chain wheel shaft mounted on a bearing base A; the steering chain wheel shaft is in key joint with a steering chain wheel; multifunctional wheels are mounted on two sides of the steering chain wheel; one sides of the multifunctional wheels are gears, and the other sides are chain wheels; an adjusting shaft is parallel to the steering chain wheel shaft, and is mounted on a bearing base B; an adjusting handle is connected with the adjusting shaft; the adjusting shaft is provided with an adjusting chain wheel; the adjusting chain wheel is connected with the chain wheels of the multifunctional wheels through chains; the gears of the multifunctional wheels are engaged with racks; locking blocks are arranged in the engaged places between the gears of the multifunctional wheels and the racks; the racks are fixed with slide rails; the slide rails are provided with dovetail grooves; slide blocks are arranged in the dovetail grooves; and the bearing base A and the bearing base B are both fixed on the slide blocks. The device adjusts the position of the tail steering chain wheel shaft through mechanical transmission to adjust the center distance of head and tail chain wheels so as to realize the chain tensioning, is lower in cost and high in reliability, and can prevent the oil leakage problem caused by tensioning of a hydraulic cylinder.

Description

technical field [0001] The invention relates to the field of mining transportation equipment, in particular to a tail chain tightening device for a scraper conveyor. Background technique [0002] As an important conveying equipment in the coal mining face, the scraper conveyor's reliable, safe and efficient operation has an important impact on the mining efficiency of the coal mine and the economic benefits of the enterprise. With the increase of coal mining volume, the scraper conveyor must increase the conveying capacity by increasing the laying length. As the traction mechanism of the scraper conveyor, the scraper chain needs to bear a large load during the working process. In addition, the scraper chain is not an absolute rigid body, the action of the load will cause the scraper chain to deform and elongate, and the long-term accumulation will lead to the loosening of the scraper chain. If the loose scraper chain is not tensioned in time, problems such as chain droppin...

AI Technical Summary

Problems solved by technology

The chain tightening method has low efficiency and high labor intensity, and the scraper machine must be stopped during the manual chain tightening process, which seriously affects work efficiency

The hydraulic automatic chain tightening adopts the way of hydraulic cylinder to drive the telescopic tail to realize the tensioning of the scraper chain. This method can achieve the effect of automatic tensioning in theory, but due to the harsh underground conditions, the hydraulic control components are prone to failure, and the actual use effect not ideal

In addition, the structure of the hydraulic chain tightening system is complicated, and the purchase cost and maintenance cost are relatively high, so it has not been well promoted in small and medium coal mines.

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