Tension device for belt conveyer

Abstract

The invention discloses a tension device for a belt conveyer, which comprises a movable bracket, fixed base frames fixedly arranged behind and on two sides of the movable bracket, a first reversing pulley and a second reversing pulley which are arranged on the fixed base frames horizontally along the axial line and positioned on two sides of the movable bracket respectively, a first movable pulleyand a second movable pulley which are arranged on the back end face of the movable bracket vertically along the axial line respectively, a first fixed pulley and a second fixed pulley which are arranged on the fixed base frames vertically along the axial line respectively, and a first rope and a second rope, wherein a first end of the first rope is fixed on the fixed base frames, while a second end rounds over the first movable pulley, the first fixed pulley and the first reversing pulley in turn and then is connected with a balance weight; and a first end of the second rope is fixed on the fixed base frames, while a second end rounds over the second movable pulley, the second fixed pulley and the second reversing pulley and then is connected with the balance weight. The tension device has the advantages of large and stable tension range, small floor space, simple and reliable structure, convenient maintenance, lowered weight of the balance weight, and small stress on the ropes.

Description

technical field [0001] The invention relates to a tensioning device for a belt conveyor, in particular to a tensioning device for a belt conveyor which can reduce the space required for installation, has a large and stable tension range and a simple structure. Background technique [0002] Belt conveyors are widely used in mining, metallurgy and other fields. The tensioning device is an important part of the belt conveyor. The tensioning device is used to ensure sufficient tension of the conveyor belt, and to ensure sufficient friction between the drive rollers during the startup, braking, and normal operation of the conveyor. Prevent slipping etc. Additionally, limit belt sag to prevent material from spilling off the belt. [0003] Usually the form of the tensioning device is a screw tensioning device, a vertical weight tensioning device, etc. These tensioning devices have their limitations. For example, the screw tensioning device is only suitable for small tensions, a...

AI Technical Summary

Problems solved by technology

[0005] However, in the above-mentioned patent application, since the hydraulic cylinder is used to generate tension, the range of tension is small, and very large tension cannot be generated.

For example, in mining, the force of the material in the intermediate silo on the conveyor belt can reach tens to tens of tons. Therefore, the required tension cannot be generated with a hydraulic cylinder.

In addition, under poor working conditions, such as an environment with a lot of dust, the components of the hydraulic system are prone to failure

At the same time, the control of the hydraulic system is very complicated, the tension adjustment is complicated, and the tension is unstable, which leads to the complex structure of the entire tension device, which leads to increased costs and high failure rates

[0006] Secondly, for the use of hydraulic cylinders and hydraulic valves, the strength of hydraulic cylinders such as pistons is required to be very large. A failure of a hydraulic valve may cause the entire tensioning device to fail to generate tension. Therefore, the reliability of hydraulic cylinders and hydraulic valves is very high. High, high production cost, frequent maintenance

[0007] In addition, the hydraulic system used in the above patent application requires a separate hydraulic station. During the operation of the conveyor, the hydraulic system needs to work all the time, so the cost is high

Moreover, a large space is required for the hydraulic station to be arranged behind the conveyor, resulting in a very large space occupied by the entire tensioning device

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