A belt conveyor tensioning system

Abstract

The invention discloses a belt conveyor tensioning system, which belongs to the technical field of belt conveyors. The constant pressure pump and the emergency pump are connected to the two-position three-way valve I, the mechanical three-position four-way valve and the two-position three-way valve III after being isolated by the one-way valve; Two-way proportional valve I and two-position two-way proportional valve II; the speed regulating valve is connected with a hydraulically controlled two-position two-way valve II, and the hydraulically controlled two-position two-way valve II is connected to the first oil inlet of the double balance valve II; The two-position two-way proportional valve I is connected to a pressure compensator I, and the pressure compensator I is respectively connected to a first two-position three-way valve II and a second two-position three-way valve II. The present invention adopts the form of proportional valve + pressure compensator to improve the controllability of the combined action of the winch system and the tensioning oil cylinder; real-time control of the overflow pressure of the electric proportional overflow valve to reduce the impact of the winch system in real time, and the lifting system is stable Reliability; real-time oil replenishment for the system through back pressure to prevent a cavity of the winch motor from being sucked empty under the action of load.

Description

technical field [0001] The invention relates to the technical field of belt conveyors, in particular to a belt conveyor tensioning system. Background technique [0002] Long-distance belt conveyors have the advantages of high degree of automation, low environmental pollution, and low transportation costs, and are widely used in many fields such as coal mining. Since the conveyor belt is a viscoelastic body, most of the energy stored or released by the belt during the start and stop of the conveyor forms a large stress fluctuation in the belt, and these stress fluctuations will cause the tension and deflection of the conveyor belt to occur. Variety. During use, when the tension decreases to a certain value, it will cause the conveyor belt to slip and fail to work normally. In addition, the elastic deformation and plastic deformation of the tape will cause the tape to become loose, causing serious accidents such as material spillage, coal accumulation, tape damage, etc., and...

AI Technical Summary

Problems solved by technology

[0017] 1. When tensioning, the winch motor moves while the tensioning cylinder also moves. Since the speed is affected by the load, and the loads of the motor and the cylinder are different, it is difficult to control the running speed of the motor and the cylinder, and it is difficult to accurately control the movement position of the cylinder;

[0018] 2. After the tension force is reduced, the winch is used for tensioning. Due to the viscoelastic characteristics of the conveyor belt, the winch will be turned on and off when the tension is fine-tuned, and the brake needs to be turned on the motor first when the winch moves. When it moves again, it is difficult to match the opening of the brake with the action of the motor, and it is prone to impact;

[0019] 3. Use the motor to fine-tune the tension, the micro-movement of the motor is not easy to control, and the phenomenon of motor suction may occur; when there is a problem with the oil pump or the motor, the winch cannot be used for emergency use

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