JPH11322037A - Belt conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the noise and vibration while insuring the stabilized traveling of a belt by incorporating a magnetic body in at least one part of a loop- like belt, and arranging magnets for applying the magnetic force to the belt so as to float the belt at a constant height. SOLUTION: As a loop-like belt, a belt 11, in which a magnetic body (a thin iron plate or the like) is embedded inside, is used, and this belt 11 is wrapped around pulleys 2, 3 provided at both ends for orbital movement, and a cargo is placed on a carrier side top surface (a carrying surface 11A) of the belt 11 for carrying. At this stage, the belt 11 is supported for traveling at the carrier side thereof by rollers 5, and on the other hand, electromagnets 7 are arranged in an upper side of the return side belt 11 (a surface 11B opposite to the carrying surface) so as to float the belt 11 at a constant height in the return side of the belt 11, and the magnetic body 11 embedded in the belt 11 is attracted. Space holding rollers 9 are arranged at appropriate positions in the surface 11B opposite to the carrying surface so as to prevent the generation of contact of the belt 11 with the electromagnets 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt conveyor for transporting bulk materials such as ore and coal.

[0002]

2. Description of the Related Art Roller type belt conveyors and air levitation type belt conveyors are generally known as belt conveyors for transporting ore and coal.

FIGS. 3 and 4 show a roller type belt conveyor. The roller-type belt conveyor drives the loop-shaped belt 1 wound around pulleys 2 and 3 at both ends while supporting the belt 1 with rollers 5 and 6 disposed on a carrier side (upper side) and a return side (lower side). It was made. In this conveyor, a load such as coal is placed on one end of the belt 1 on the carrier side as shown by an arrow A, conveyed to the other end, and then discharged to the outside as shown by an arrow B. Here, since both rollers 5 and 6 support the belt 1 from below, the roller 5 on the carrier side rolls on the opposite to the conveying surface 1B of the belt 1, while the roller 6 on the return side conveys the belt 1. Transfer contact with surface 1A.

FIG. 5 shows an example of an air floating type belt conveyor. This air-floating belt conveyor has a large number of air holes 17 arranged in the longitudinal direction at the center in the width direction of the troughs 12 and 13 on the carrier side and the return side which support the belt 1, and the troughs 12 and 13 Each air hole 1 on the bottom
7 is provided, and air is supplied from a blower 18 to the air duct 16 so that each trough 12,
Air is ejected upward from the air holes 17 of the thirteen to form an air layer between the belt 1 and the troughs 12 and 13 so that the moving belt 1 floats. Reference numeral 14 denotes a conveyor frame that supports the troughs 12 and 13. Also in this case, as in the case of the roller type belt conveyor, the opposite side 1B of the belt 1 faces the trough 12 on the carrier side, whereas the side 1A of the belt 1 faces the trough 13 on the return side. In this state, the belt 1 moves while being levitated by air.

[0005] With this configuration, the air levitation type belt conveyor can greatly reduce the resistance acting on the belt and can reduce the driving load as compared with the roller type belt conveyor. In addition, there is an advantage that noise and vibration can be reduced by eliminating the roller.

[0006]

By the way, in the conventional roller type belt conveyor, as shown in FIGS. 3 and 4, the roller 6 is a conveying surface (dirty surface) 1A of the belt 1 on the return side.
As a result, there is a problem that the conveyed material remaining on the surface of the belt 1 adheres to the outer peripheral surface of the roller 6 and collects, thereby causing meandering of the belt 1 and generating noise and vibration. Was. Although it is conceivable to eliminate the return roller 6, the return belt 1 may be bent, thereby increasing the tension of the belt 1.

On the other hand, even in the case of an air-floating belt conveyor, as shown in FIG. Falls into the trough 13 and the air hole 1
7 may be blocked. In this case, there is a problem in that the air that caused the belt 1 to float cannot be jetted out, so that the belt 1 cannot float and the belt 1 cannot run stably.

In consideration of the above circumstances, the present invention ensures stable running of the belt, reduces noise and vibration, and reduces the belt tension by eliminating as much as possible the one that comes into contact with the conveying surface of the belt that is easily soiled. It is an object of the present invention to provide a belt conveyor capable of preventing an increase and reducing a driving load.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a belt conveyor for driving a loop-shaped belt to circulate and load and convey a load on the belt. In addition to incorporating the body, a magnet is arranged on the return side of the belt to apply a magnetic force to the belt so that the magnet floats at a certain height. That is, on the return side, the belt is levitated to a certain height by the magnetic force of the magnet arranged, so when applied to a roller type belt conveyor, the rollers on the return side can be eliminated or at least the number can be reduced,
When applied to an air-floating belt conveyor, there is no need to provide a trough on the return side, and in any case, it is possible to reduce as much as possible those that come into contact with the conveying surface, which is the dirty surface of the belt. Accordingly, it is possible to stably drive the belt, to reduce the driving load, and to reduce noise and vibration. In addition, since the belt is maintained at a constant height by the magnetic force, it is possible to prevent the tension of the belt from increasing.

In this case, the lifting of the belt on the return side is performed by the magnet disposed above the belt on the return side, so that the space below the belt is opened, and the conveying surface (dirty surface).
It is possible to freely arrange a mechanism or the like for removing extraneous matter.

Further, by using an electromagnet as the magnet, the magnetic force of the electromagnet can be easily adjusted in consideration of the weight of the belt.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing the configuration of a roller type belt conveyor to which the present invention is applied, and FIG.
It is II sectional drawing. The first feature of this belt conveyor is that a belt 11 having a magnetic material (such as a thin iron plate) 10 embedded therein is used. In this conveyor, the carrier-side belt 11 is supported by rollers 5. By driving the loop-shaped belt 11 wound around the pulleys 2 and 3 at both ends to rotate, the upper surface of the carrier-side belt 11 (conveying surface 11A). ) And transport it. Arrows A and B indicate loading and discharging operations.

The second feature is that, in order to float the belt 11 at a constant height on the return side, instead of the rollers arranged on a normal roller type belt conveyor, the upper side of the return side belt 11 Electromagnet 7 on transfer surface 11B side)
That is, is used. The electromagnet 7 is fixed to the lower surface of the iron plate 8 serving as a yoke so that the magnetic force can efficiently reach the belt 11. Further, the space holding roller 9 is disposed at an appropriate position on the side opposite to the conveying surface 11B so that the belt 11 does not come into contact with the electromagnet 7 by being pulled more than necessary by the electromagnet 7, and an appropriate space is provided between the belt 11 and the electromagnet 7. Holding a great space. In this case, the strength of the magnetic force of the electromagnet 7 can be adjusted by a control device (not shown), and is adjusted so that the belt 11 can be held at an appropriate height.

In this belt conveyor, the magnetic force of the electromagnet 7 is applied to the belt 11 on the return side, so that the belt is kept at a certain height by the balance between the magnetic force and the weight of the belt 11. Therefore, as in the case of the air levitation type, the belt 11 can be run almost without contact, and low noise, low vibration, and low driving load can be realized. Further, since the belt 11 is held at a constant height by the electromagnet 7, it is possible to prevent the belt 11 from being bent, and to suppress an increase in belt tension.

Further, since the device (roller) on the lower side (conveying surface 1 side) of the return side belt 11 is eliminated and the lower side is opened, a cleaning mechanism for the conveying surface 11A is freely disposed below the belt 11. Thus, the deposit M on the transfer surface 11A can be removed cleanly.

In the above embodiment, the magnetic material 10 is embedded in the belt 11, but the belt may be made of a material in which the magnetic material is mixed or the magnetic material itself.
Further, the magnetic material may be provided only on a part of the belt corresponding to the electromagnet. Further, a permanent magnet can be used instead of the electromagnet. In addition, a preliminary support means may be provided below the belt 11 in case the lifting force of the belt is interrupted for some reason. Even in such a case, the belt 11 floats during normal operation,
There is no contact of the belt 11 with the support means, and there is no hindrance to driving.

In the above embodiment, the case where the belt 11 is floated by the magnetic force of the electromagnet has been described. However, the permanent magnet is embedded in the belt, and the magnet exerting the magnetic force on the belt is located below the return side belt (dirt surface side). It is also possible to arrange and to float the belt by the repulsive force of the magnet.

In the above embodiment, the case where the present invention is applied to a roller type belt conveyor has been described. However, the present invention may be applied to an air floating type belt conveyor. In this case, the configuration on the carrier side may be the same as that shown in FIG. 5, and the configuration on the return side may be the same as that in FIG. That is, the trough may be omitted on the return side, and a magnet may be provided instead.

[0019]

As described above, according to the magnetic levitation type belt conveyor of the present invention, the belt is levitated to a certain height by the force of the magnet arranged on the return side, so that it is applied to the roller type belt conveyor. In this case, it is possible to eliminate or at least reduce the number of rollers on the return side.
In addition, in the case of applying the air levitation type, the return side belt can be run without contacting the transport surface without providing the return side trough. Accordingly, it is possible to stably drive the belt, to reduce the driving load, and to reduce noise and vibration. In addition, since the belt is maintained at a constant height by the magnetic force, it is possible to prevent the tension of the belt from increasing.

Further, since the belt is lifted by the magnetic force of the magnet disposed above the return side belt, the space below the belt can be opened, and the mechanism for removing the deposits on the transfer surface (dirty surface) can be freely set. Can be arranged.

Further, since the belt is floated by the magnetic force of the electromagnet, the magnetic force can be easily adjusted, and the belt can be supported at a constant height in a well-balanced manner.

[Brief description of the drawings]

FIG. 1 is a side view showing a belt conveyor according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a side view showing a conventional roller type belt conveyor.

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3;

FIG. 5 is a perspective sectional view showing a conventional air levitation type belt conveyor.

[Explanation of symbols]

 7 Electromagnet 10 Magnetic body 11 Belt containing magnetic body

Claims (3)

[Claims] 1. A belt conveyor for driving a loop-shaped belt to circulate and carrying a load on the belt, wherein a magnetic material is incorporated in at least a part of the belt, and a magnetic force is applied to the belt on a return side of the belt. A belt conveyor, wherein magnets for causing the belt to float at a certain height by applying a force are arranged. 2. The belt conveyor according to claim 1, wherein the magnet is disposed above the return side belt, and the belt is levitated by the attraction of the magnet. 3. The belt conveyor according to claim 1, wherein an electromagnet is used as the magnet, and the magnetic force of the electromagnet is set so as to balance with the weight of the belt.