To mine coal, coal miners need to dig it out of the pit and transport it. The traditional mining area basically relies on the belt conveyor to transmit, the advantage of the belt conveyor is that it can be continuously transmitted and the transmission distance is long. The existing coal mine conveying structure includes: active and driven roller, 2 fixed plates and conveying belt. The two fixed plates are respectively installed on both sides of the frame, and the conveying belt is arranged on the active and driven roller, and the rotating shaft of the active and driven roller is arranged on the corresponding fixed plate. When working, active and driven rolling rotation drives the conveyor belt to move; After working for a period of time, the conveyor belt in the active and driven drum will appear to deviate, once the conveyor belt deviates, it is necessary to adjust the position of the driven roll, over time, the conveyor belt will be deformed, affecting the operation of the conveyor belt. This paper analyzes the cause and harm of belt conveyor deviation and puts forward a kind of deviation adjusting device which can automatically correct the deviation of belt. Through the device can be produced coal and coal gangue fast transport, enhance the rapid response capacity while ensuring production efficiency, improve the safety of equipment.
1. Analysis of running deviation
When there are quality defects at the end of the delivery with joint, improper maintenance, the accumulation of goods is too heavy, will cause the conveyor belt run off; In addition, in the process of transporting coal mines or coal gangue, if the conveyor belt is improperly installed and used for a period of time, the belt is easy to run off, that is, the belt does not follow the original route. Belt deviation will bring great influence to the conveyor, such as will increase the load of the conveyor, or accelerate the wear degree of the conveyor belt, affect the service life of the conveyor belt, and then lead to the normal work of the conveyor. Therefore, operators need to stop maintenance, adjust the support of the conveyor mixed height, but also overhaul the belt walking track, the belt conveyor guide to the correct track. In the actual production process, the shutdown and maintenance caused by conveyor belt deviation affect production efficiency, increase labor costs, consume a lot of materials, and reduce the service life of the conveyor. If you need conveyor belt repair technical support, please click
2. Initial design of deflector
At the beginning of the project, the steel plate was selected as the lower support frame. The thickness of the steel plate was 15 mm, the width was cut to 80 mm, and the length was 1 000 mm. The thickness was 5 mm and the width was 50 mm. 50 mm, 180 mm length of support mixing as the bottom support mixing, this support mixing is also known as the support mixing, which has an intermediate shaft; Choose 15 mm thickness, 65 mm width, length of 200 mm steel plate as a side support rod installation frame, the upper end of the steel plate bending 110° upward and outward, the lower end of the steel plate is fixed on the side wall of the conveyor; The steel plate of the side supporting rod frame is the same as that of the lower supporting rod frame, and the material and size of the side supporting wheel are the same as those of the lower supporting wheel, which is convenient for the replacement and procurement of parts. The side support is installed on the side support rod installation frame, and the Angle between the axis of the rear side support and the belt plane is 70°, and the two sets of the same mechanism is installed on both sides of the conveyor, and set symmetrically, and the prototype of the equipment is completed.
Will the device on the conveyor every 1 set of 4 m assembly, under the two support rod hold on the belt, side rod and the conveyor belt side edge contact, to prevent the conveyor belt running deviation, when conveyor belt due to uneven when moving to one side, side supporting rod block corresponding side of the belt running deviation, rotating set side support stick will have a great friction and belt side, Avoid the adverse impact on production caused by frequent shutdown maintenance due to conveyor belt running deviation. It can effectively reduce belt deviation and reduce downtime.
3. Improvement of deflecting device
After improvement in the later stage of the project, the effect of deviation adjustment device is better. The deflection bracket can be reciprocally and movably installed on the fixed frame; The deflection supporting rod is rotationally installed on the deflection support, and the top of the deflection supporting rod is used to support the conveyor belt; The driving mechanism is connected with the deflecting bracket and can drive the deflecting bracket to carry out deflecting in the direction of thickness and width of the conveyor belt without affecting the reciprocating movement of the conveyor belt. The bottom and side parts of the deflection bracket are respectively installed on the fixed frame through the bottom spring and the side spring, so that the deflection bracket can be reset to install on the fixed frame, and the deflection bracket can reciprocate in the thickness direction and width direction of the conveyor belt. The deflection bracket is installed with a limited position device at the front and back end of the conveying direction of the conveyor belt, and the limit device comprises a limit slot installed in the fixed frame and a limit wheel connected in the limit slot to limit the movement of the deflection bracket in the conveying direction of the belt.
The adjusting bracket has the first side and the second side relative to each other, and the driving mechanism includes the left and right eccentric CAM parts and right eccentric CAM parts respectively arranged on the left and right of the adjusting bracket, and the corresponding left eccentric CAM parts and right eccentric CAM parts transmission connected with the left driving parts. The left drive can include left motor and left reducer, the right drive can include right motor and right reducer, and the left side of the deflection bracket is provided with the left side of the left eccentric CAM parts and the peripheral surface of the left side of the driving wheel and the left end face of the driving wheel; The right side of the deflection bracket is provided with the right eccentric CAM parts of the peripheral surface and the end face of the right peripheral surface of the driving wheel and the right end face of the driving wheel. Left and right end of eccentric CAM driven wheel to stand to end with a height difference, the right and the right end of eccentric CAM driven wheel to stand to end with a height difference, so that they can cope with the belt respectively different toward the migration drives through the left and right drive parts to drive the eccentric CAM from left and right eccentric CAM parts rotating; Makes left week surface driven pulley, left to face are driven wheel and right to weeks surface driven pulley, the right to end are driven wheel separately to follow eccentric CAM from left and right eccentric CAM parts and the corresponding mobile, driving adjusting bracket on the direction of the direction of the thickness and width of the belt to adjust the reciprocating movement of the conveyor belt to realize rectification.
In addition, when the left drive to drive the left eccentric CAM rotation, the left drive bracket reciprocating in turn up, to the left side, down, to the left side of the movement or reciprocating in turn up, to the left side, down, to the left side of the movement; When the right drive to drive the right eccentric CAM parts rotation, the right reciprocating bracket in turn up, to the right of the lateral, down, to the right of the inside of the movement or reciprocating in turn up, to the right of the inside, down, to the right of the lateral movement. The purpose of the deviation support moving upward is to increase the friction between the deviation support rod and the belt, so that in the process of the deviation support moving outward, the belt has different displacement, so as to achieve correction.
4. Optimization of deflector
Optimization scheme: the coal mine belt conveyor drum deviation adjustment device also includes a controller and a conveyor belt deviation detection device installed on the left and right of the deviation adjustment support respectively. The driving mechanism and the left and right conveyor belt deviation detection device are electrically connected with the controller respectively. If on the left side of the conveyor belt running deviation detection device to the conveyor belt running deviation occurs, the controller to the right to drive a signal launch, make right drive a drive right eccentric CAM rotation, the rotation of the eccentric CAM thing right makes the adjusting bracket on the right side of the reciprocating in turn up, to the right of the lateral movement of the medial, downward and to the right, the reality of the conveyor belt deviation; If on the right side of the conveyor belt running deviation detection device detects the belt running deviation occurs, set the controller to the left of the drive signal, make left drive a drive left eccentric CAM rotation, the rotation of the eccentric CAM pieces left makes adjusting bracket on the left, and in turn up, medial to the left, down, left lateral movement and the conveyor roller adjusting.
Belt conveyor is the main transport equipment in coal mine production, which costs a lot. In this paper, the design of coal mine belt conveyor roller deflection device can effectively prevent the phenomenon of belt running deviation, reduce downtime maintenance time, improve production efficiency, increase the service life of the conveyor, has considerable economic and social benefits. Through the device can be produced coal and coal gangue fast transportation, enhance the rapid response capacity while ensuring production efficiency, so that enterprises in the domestic and foreign market competition to occupy a favorable position, for the further development of enterprises lay a good foundation.
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