Intermittent self-locking type chain fastening device for scraper machine and chain fastening method

Abstract

The invention provides an intermittent self-locking type chain fastening device for a scraper machine. The intermittent self-locking type chain fastening device comprises a connecting hood barrel andan intermittent hydraulic chain fastening mechanism. The intermittent hydraulic chain fastening mechanism is installed in the connecting hood barrel. The hydraulic chain fastening mechanism comprisesa hydraulic cylinder, a rack, a ratchet-gear wheel, a first pawl, a first ratchet, a coupling, a second ratchet and a second pawl. One end of the rack is fixedly connected with one end of the hydraulic cylinder. The rack and the ratchet-gear wheel are engaged. According to the intermittent self-locking type chain fastening device, the hydraulic cylinder is adopted as a power part, and the intermittent self-locked type chain fastening device can better adapt to a downhole emulsified liquid working environment; the working position of the hydraulic cylinder is accurate, and the tensioning degreeof a chain can be controlled accurately; self-locking of the two sets of ratchets and pawls at any time is achieved , and locking reliability is high; the hydraulic cylinder is arranged to be perpendicular to the transmission direction of the power part, the sizes of the ratchet-gear wheel and the rack are adjusted conveniently, and the size of the chain fastening device can be reduced effectively; the ratchet and pawl structure is achieved, torque is large, and the transmission efficiency is high. The invention further provides a chain fastening method of the intermittent self-locking type chain fastening device for the scraper machine.

Description

technical field [0001] The invention relates to the technical field of chain tightening, in particular to an intermittent self-locking chain tightening device and a chain tightening method for scraper machines. Background technique [0002] The most commonly used chain tensioners for scraper conveyors in domestic coal mines are brake disk chain tensioners and hydraulic motor chain tensioners. Although hydraulic motor chain tensioners have a good chain tightening effect, because the underground hydraulic power source is emulsion , causing the hydraulic motor to be prone to corrosion and seal damage during use, resulting in a low service life of the hydraulic motor chain tensioner and the need for frequent maintenance; and the maintenance of the hydraulic motor is difficult and costly, resulting in certain economic losses. [0003] The brake disc chain tensioner is only suitable for low torque, and requires frequent start and stop of the motor, and the motor speed is high, whi...

AI Technical Summary

Problems solved by technology

[0002] The most commonly used chain tensioners for scraper conveyors in domestic coal mines are brake disk chain tensioners and hydraulic motor chain tensioners. Although the hydraulic motor chain tensioners have a good chain tightening effect, because the underground hydraulic power source is emulsion , causing the hydraulic motor to be prone to corrosion and seal damage during use, resulting in a low service life of the hydraulic motor chain tensioner and the need for frequent maintenance; and the maintenance of the hydraulic motor is difficult and costly, resulting in certain economic losses

[0003] The brake disc chain tensioner is only suitable for low torque, and requires frequent start and stop of the motor, and the motor speed is high, which cannot accurately control the tension of the chain; and the use of the brake disc chain tensioner requires manual jogging evenly The action should be slight and uniform, improper action may easily cause chain breakage, and the service life is low

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