JPH08244933A - Belt conveyor device - Google Patents

Abstract

PURPOSE: To provide a belt conveyor device capable of carrying a large quantity at a high speed and having small noises, vibrations, causing less environmental pollution and having low running costs and initial costs. CONSTITUTION: An air floating type belt conveyor for floating a belt by means of compressed air is constructed in such a manner that a carrier side trough 10 is formed arc or semicircular with its sectional surface becoming recessed downward, a return side trough 20 is formed arc or semicircular with its sectional surface projecting upward, a cover 7 is provided, the sides of both troughs 10 and 20 are hermetically sealed by a side wall 8, air filling holes 10a and 20a are created in the centers of both troughs 10 and 20 and these are connected to air ducts 12 and 22 for compressed air.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt conveyor device, and more particularly to a belt conveyor device which can convey both carrier side and return side belts by air levitation, and can convey a large amount of conveyed objects over a long distance. It is intended that the conveyor device can be supplied at a low equipment cost.

[0002]

2. Description of the Related Art In a conventional belt conveyor device, a belt for loading and transporting a conveyed object rolls on a central support roller and a pair of left and right side rollers arranged at a plurality of substantially equal intervals in the belt running direction. While being moved, the transported object is transferred. Similarly, the return-side belt also rolls on the return rollers arranged at a plurality of positions.

[0003]

However, in such a conventional belt conveyor device, a large amount of power is required to convey a large amount of conveyed articles over a long distance, and various rollers are used. Due to the restriction of rotation resistance and rotation speed, there were the following problems. It was difficult to increase the speed due to the restriction of the belt conveyance speed. The generation of noise associated with the rotation of the roller deteriorates the working environment. It took a lot of effort to maintain many rollers. There was vibration of the equipment due to the rotation of the roller.

[0004]

SUMMARY OF THE INVENTION In order to solve the above problems and to supply a belt conveyor device with low equipment cost, in the present invention, in the first invention, an endless belt and a carrier side of the belt are provided. And a belt bearing trough having a plurality of compressed air injection holes for levitating the belt in the belt traveling direction on both the return side and the return side, wherein the carrier side belt bearing trough has a lower cross section. Formed in an arc shape or semi-circular shape that is concave on the side,
The return side belt bearing trough is formed in an arcuate shape or semicircular shape having a convex upward cross section, and the carrier side belt bearing trough is provided with a covering cover that surrounds and seals the carrier side belt, and The belt bearing trough and the return side belt bearing trough are connected and sealed by a pair of left and right side walls along the belt running direction, and a pressure source is connected to the lower center of the carrier side trough and the carrier side bearing trough. A compressed air pipe for supplying compressed air to the injection hole is connected, and an exhaust port for compressed air is provided at one end of the cover and the side wall. In the second invention, the belt conveyor trough on the carrier side and the belt support trough on the return side are both formed by cutting a cylindrical tube having the same diameter into a semicircular cross section. Further, according to the third aspect of the invention, the belt conveyor device according to claim 1 or 2, wherein a plurality of mine discharge outlets are provided in the belt running direction on both sides of the return side belt bearing trough.

[0005]

In the present invention, compressed air is supplied to the belt bearing trough on the carrier side and the belt bearing trough on the return side during operation of the belt conveyor device to form an air film layer of compressed air between the belt and the trough. Since the belt is levitated, the power consumption for transporting the conveyed material on the belt is remarkably reduced. Further, the trough and the side wall for accommodating the belt have a simple structure and the facility cost is low, and the hermetically sealed structure significantly reduces environmental pollution, noise and vibration at the installation place as compared with the conventional one. Further, in the second invention, since the carrier side trough and the return side trough can be manufactured by one cylindrical pipe (which may be either a resin pipe or a steel pipe) which is a commercial product, it is particularly useful for reducing the facility cost. is there. Further, in the third aspect of the present invention, the fallen ore that falls and accumulates on the return side trough can be easily and easily discharged by air transfer, so that maintainability is improved.

[0006]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 4 relate to an embodiment of the present invention, FIG. 1 is an overall vertical sectional view of a belt conveyor device, FIG. 2 is a lateral sectional view taken along line AA of FIG. 1, and FIG. 3 is another embodiment. FIG. 4 is a cross-sectional view showing another embodiment.
As shown in FIGS. 1 and 2, in the belt conveyor device 100, an endless smooth belt 1 is wound between a head pulley 2 and a tail pulley 3 which are rotationally driven by a belt driving device (reduction motor) 2a, At the intermediate portion between the head pulley 2 and the tail pulley 3, as shown in FIG. 2, the belt 1 is placed on a carrier side belt bearing trough (hereinafter abbreviated as carrier side trough) 10 on the carrier side, and then returned. On the side, it is in a state of being placed on a return side belt bearing trough (hereinafter abbreviated as a return side trough) 20. The carrier-side trough 10 is formed in an arcuate shape or a semi-circular shape whose section is recessed downward, and has an injection hole 10 a and an air duct 12 for injecting upward compressed air supplied from a blower 30 which is a compressed air source at the lowermost portion. It is provided and forms a boundary film layer of compressed air between the lower surface of the belt 1 on which the transported goods are loaded and the carrier-side trough 10 to float the belt 1 while transferring the belt. A cover 7 for wind and rain prevention is laid on the upper side of the carrier-side trough 10 on which the belt 1 is placed. On the other hand, the return-side trough 20 is located below the carrier-side trough 10 and has a cross section formed in an arc shape or a semi-circular shape having an upward convex shape. Injection hole 20
An air duct 22 for introducing compressed air to a is provided, and the belt 1b on the return side is floated and transferred. Also,
Both ends of the carrier-side trough 10 and both ends of the return-side trough 20 are connected by a pair of left and right side walls 8 to form a hermetically sealed structure inside.

The compressed air after the carrier side belt 1a is floated is discharged from both sides of the belt 1a, passes through the covering cover 7, and is discharged to the atmosphere through the exhaust port 14. The compressed air after the return side belt 1b is floated is also discharged to the atmosphere from the exhaust port 24 through the space of the closed structure surrounded by the side wall 8 described above. These structures are fixedly installed at the installation place via a pair of left and right column bases 6 which are erected substantially evenly in the belt running direction.

[0008] Also, since the transported material attached to the transported material carrying surface of the return belt 1b drops during the return at both ends of the return trough 20, the left and right pair of falling ore discharge outlets are collected and eliminated. 26 and a valve 27 are arranged at required positions in the longitudinal direction, and the valve 27 is opened so that the exhaust gas is partly ventilated and discharged by air conveyance.

FIG. 3 shows another embodiment of the present invention.
Only the points different from FIG. 2 are described. The return-side trough 20 is formed in a semicircular shape like the carrier-side trough 10, and the radius thereof is the same as that of the carrier-side trough 10 or substantially the same. Instead of the air duct 22, a bottom plate 9 is provided on the lower surface of the return-side trough 20, and the space surrounded by the return-side trough 20 and the bottom plate 9 is used as a substitute for the air duct 22. In addition, the cover 7 is also the trough 1 on the carrier side.
The structure is made simpler by the flat plate suspended at both ends of 0, and the carrier side trough 10 and the return side trough 20 are manufactured using commercially available resin pipes or steel pipes, and the facility cost is greatly reduced. Is achieved (if the carrier side trough 10 and the return side trough 20 are used by cutting the same cylindrical tube into half sections, there is no waste and the material cost is low).

Further, in another embodiment shown in FIG. 4, the covering cover 7 and the carrier side trough 10 are integrated to further reduce the equipment cost. Although the cylindrical pipe forming the covering cover 7 and the carrier side trough 10 and the side wall 8 are welded to each other in the embodiment of FIG. 4, they may be joined to each other by a flange in consideration of disassembly and inspection.

[0011]

In the belt conveyor device of the present invention described above, a large amount of high-speed transfer is possible, conventional problems such as noise generation and work environment pollution are solved, maintenance is facilitated, and maintainability is improved. In addition to the improvement, it is possible to significantly reduce running cost and initial cost. In addition, the return-side belt bearing trough has a chevron shape that is convex upward, which reduces contact wear at the belt end and facilitates discharge of fallen mine that has fallen onto the upper surface of the return-side belt bearing trough, and compression. Air circulation is stabilized, belt fluttering is reduced, and belt life is extended.

[Brief description of drawings]

FIG. 1 is an overall vertical sectional view of a belt conveyor device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line AA of FIG.

FIG. 3 is a cross-sectional view of a belt conveyor device according to another embodiment of the present invention.

FIG. 4 is a cross-sectional view of a belt conveyor device according to another embodiment of the present invention.

[Explanation of symbols]

1 Belt 1a Carrier Side Belt 1b Return Side Belt 2 Head Pulley 2a Belt Drive Device (Reduction Motor) 3 Tail Pulley 4 Inlet 5 Chute 6 Pillar Base 7 Cover Cover 8 Side Wall 9 Bottom Plate 10 Carrier Side Belt Bearing Trough (Carrier Side Trough) 10a Air injection hole 12 Air duct 14 Exhaust port 20 Return side belt bearing trough (return side trough) 20a Air injection hole 22 Air duct 24 Exhaust port 26 Falling ore discharge port 27 Valve 30 Blower 32 Valve 100 Belt conveyor device M Transported goods

Claims (3)

[Claims] 1. An air levitation belt having an endless belt and a belt bearing trough having a plurality of compressed air injection holes for levitation of the belt on the carrier side and the return side of the belt in the belt running direction. In the conveyor device, the carrier side belt bearing trough is formed in an arc shape or a semi-circular shape whose cross section is concave downward, and the return side belt bearing trough is formed in an arc shape or a semi-circular shape whose cross section is convex upward. At the same time, the carrier-side belt bearing trough includes a covering cover that surrounds and seals the carrier-side belt, and the carrier-side belt bearing trough and the return-side belt bearing trough form a pair of left and right along the belt running direction. The side wall is connected and hermetically sealed, and the carrier side bearing trough and the center of the lower side of the carrier side bearing trough are connected to the compressed air source, and A belt conveyor device, to which compressed air piping for supplying compressed air to the inlet is connected, and an exhaust port for compressed air is provided at one end of the covering cover and the side wall. 2. The belt conveyor device according to claim 1, wherein the carrier side belt bearing trough and the return side belt bearing trough are both formed by cutting a cylindrical tube having the same diameter into a semicircular cross section. 3. The belt conveyor device according to claim 1, wherein the return side belt bearing trough is provided with a plurality of falling ore discharge outlets on both sides in the belt running direction.