Circular stockyard scraper chain tensioning hydraulic system

Abstract

The invention discloses a circular stockyard scraper chain tensioning hydraulic system. The circular stockyard scraper chain tensioning hydraulic system comprises an electric hydraulic pump and a pump opening protection one-way valve, an energy accumulator branch, a first pressure relay and the second pressure relay, and an oil return stop valve, wherein the electric hydraulic pump and the pump opening protection one-way valve are arranged between an oil outlet of an oil tank and an oil way of a hydraulic cylinder; the energy accumulator branch is used for achieving the shock absorption and pressure maintaining functions of an oil supply main path; the first pressure relay and the second pressure relay are arranged between a pump opening of the electric hydraulic pump and an inlet of the hydraulic cylinder, the first pressure relay is used for controlling the oil injection amount of the electric hydraulic pump, the second pressure relay is used for collecting pressure signals of the system, and when the pressure value of the system is smaller than a preset pressure value, the electric hydraulic pump is controlled to supply oil to the system for pressure maintaining; and the oil return stop valve is arranged on an oil return path between the hydraulic cylinder and the oil return port of the oil tank and is used for closing the oil return path when the oil injection amount of the system reaches a preset value. According to the system provided by the invention, by simplifying the composition of a control valve of a main oil way, the pressure maintaining mechanism of the system and the purpose of an energy accumulator loop are changed, the defects of an original system are overcome, and intelligent control is more favorably realized.

Description

technical field [0001] The invention relates to the field of bulk material loading and unloading equipment, in particular to a hydraulic system for tensioning a scraper chain in a circular stock yard. Background technique [0002] The circular stock yard is a bulk material conveying equipment with a high level of automation control, and its scraper chain tensioning device is an important unit to ensure the normal transmission and operation of the scraper chain. At present, the power drive mode of the tensioning device is mostly hydraulic drive, and the hydraulic drive is divided into manual and electric modes according to the different power sources. [0003] Among them, the manual method is to use the manual pump to supply oil to drive the extension of the single-acting hydraulic cylinder to realize the chain tension. It is characterized by simple structure and easy operation, but it requires a lot of manual investment in the working process, and it is impossible to realize...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a circular stockyard scraper chain tensioning hydraulic system to solve the problems caused by the chain's own weight and working load in the existing tensioning hydraulic system when the scraper boom drives the chain to vary to different angles of work. The impact is large, and the tension provided by the system does not match the required ones, causing the chain to be too loose or too tight, which affects the normal operation of the equipment

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