JPH02123017A - Conveyor belt cleaner - Google Patents

Abstract

PURPOSE: To improve cleaning ability and scraper cutter replacing ability by forming a scraper fame in a rotationally movable manner and arranging a plurality of slender scraper cutters to be apart from the axis of rotation of the scraper frame and to be slidable to the cross direction of the turning radius of the frame. CONSTITUTION: A cleaning device which consists of a scraper frame 12 secured to a supporting frame 11 in a rotationally movable manner and a plurality of slender scraper cutters 13 secured to the scraper frame 12 is provided downward from the return portion at the lower side of a belt 2. The axial center 14 of rotation of the scraper frame 12 is set perpendicular to the plane of the belt 2. Six scraper supporting members 15 are formed to be isolated from the center 14 to the radial direction, with one ends 18 connected to the adjacent supporting members 15 and the other ends 16 connected to hexagonal connecting members 17. The scraper cutters 13 are mounted on the supporting members 15 in a slidable manner. In such a structure, cleaning ability is improved and the scraper cutters are easily replaced.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) This invention relates to a cleaning device for cleaning a conveyor belt.

BACKGROUND OF THE INVENTION A conveyor belt is a commonly used type of material handling equipment that consists of a recirculating, flexible driven belt, usually made of rubber, neorene, or plastic material, which and a movable belt surface for transporting the belt from one location to another. Conveyor belts are used to convey materials between loading and unloading points over distances as small as one to two meters to distances of several kilometers. A belt conveyor consists of an upper conveying part that moves in the direction from the loading point to the unloading point and a lower return part that moves in the opposite direction. The belt extends between the return drums of the conveyor belt system and further includes a number of idle rollers to support the belt between the return drums.

Conveyor belts are commonly used for solid materials such as mineral ores, e.g. coal. The material is loaded onto the top of the belt and falls by gravity down the end of the conveyor. However, due to the nature of the material being conveyed, the belt surface carrying the material will usually leave some material behind after the point of unloading, when the material is removed at some point along the return portion of the belt. That is, the material temporarily ``sticks'' to the belt, thereby preventing it from falling at the desired unloading point.

Material that does not descend at the desired unloading point is then removed at some point along the return portion of the belt, thereby creating a build-up of unwanted material on the floor below the belt path.

For example, the accumulation of coal material under a belt conveyor would be detrimental in any case. Additionally, material that sticks to the belt is preferably removed and collected at a point near the unloading point to improve the material handling efficiency of the belt conveyor.

It is known to provide cleaning devices for removing sticky substances from the surface of the belt, which devices usually consist of a scraper and/or a brush to remove the sticky substances. However, known cleaning devices are not adapted to properly clean within the grooves formed in the belt after a period of use, which is usually detrimental to the clips that join the ends of the belt.

That is, when its opposing surfaces collide each time the clip passes through the cleaning device, the clip is scratched by the cleaning device, resulting in belt damage and production loss. During the operation of the conveyor, the quality of the belt also deteriorates, the cause of this is contact with the drive and support elements of the belt conveyor device, which creates longitudinal grooves in the belt. There are many types of belt cleaning devices available that operate reasonably well when the belt is in good condition and has a generally flat working surface. However, when the belt is worn and has an irregular surface, these known cleaning devices are unable to maintain contact across the entire width of the belt, and much of the material adhering to the belt escapes. and deposit along the conveyor system.

SUMMARY OF THE INVENTION It is an object of the present invention to overcome or substantially improve the problems and disadvantages of the prior art.

SUMMARY OF THE INVENTION In one broad form of the invention, there is provided a conveyor belt cleaning device for cleaning a flexible flat belt of a conveyor system, the above problems being addressed in the claims. In accordance with paragraph 1, this cleaning device comprises means for securing relative to the structure of the conveyor device, a scraper frame rotatably supported on support means, and at least three elongated scraper blades; Each scraper blade is resolved by extending in a plane generally parallel to the belt, generally away from the axis of rotation of the scraper frame, and in a direction transverse to the radius of rotation of the scraper frame.

(Example) A preferred example of the present invention will be described in detail below based on the drawings.

The illustrated cleaning device 10 consists of a support frame 11 secured to the belt conveyor device I and adapted to be located in the area below the lower return section of the belt 2. A scraper frame 12 is rotatably attached to the support frame 11, and in this case the axis of rotation is generally perpendicular to the plane of the belt 2. A plurality of longitudinal scraper blades 13 are attached to the scraper frame 12 and are arranged such that their longitudinal edges contact the surface of the belt 2.

The scraper frame 2 consists of a central portion 14 and six elongated scraper support members 15 each extending generally tangentially away from a generally equally peripherally and radially spaced position with respect to the central portion 14. Each support member 15
One end I8 is connected to an intermediate position between adjacent support members 15. The other end 16 of the support member I5 is connected by a hexagonal connecting member 17. Supporting member 15 and connecting member 17
form a rigid structure, each support member 15 being connected to the central portion 14 by a radially extending spoke 19. A scraper blade 13 extends lengthwise away from each support member 15 and into the same space as the upper surface 15 of the support member 15.
a It is arranged and attached so as to protrude into the upper area.

In this way the scraper blades 13 generally extend outwardly from the central portion I4.

The scraper frame 12 is mounted at a central portion 14 to the support frame so as to be rotatable with respect thereto.

The support frame 11 consists of two transversely spaced, parallel and coextensive beam members 20, the mountings supported by the beam members 20 being plates 21. Beam member 2
0 are supported at their ends by a vertically extending suspension device 22 which is supported by a belt conveyor device I. The suspension device 22 is attached to the scraper frame 12. The scraper blade 15 is thus adapted to come into contact with the surface of the return portion of the belt 2 and to shift into a resiliently biased position.

The beam member 20 is suspended on two tJ-shaped bolts 23 having threaded ends 24 with coil springs 25 placed between the belt conveyor structure and a nut 26 that engages the U-shaped bolts. This arrangement provides for pressure regulation of the scraper frame 12 below the return section of the belt 2. Spring 2
5 keeps the pressure of the scraper blade 13 against the belt 2 constant.

(Function) Since the scraper frame 12 is rotatably supported by the support frame 11, the scraper blade 13 is movable with respect to the support frame 11, so that when in use the scraper blade 13 is
in line with the worn parts. Worn belt surfaces are usually
It has a tank-like part in the length direction. This trough is caused by the wear of guides placed on the belt to prevent material from spilling out.

The scraper blade 13 tends to move in line with this trough. This means that the contact pressure with the belt 2
This is because the contact pressure is lower than the contact pressure with respect to the residue on the surface.

The scraper blade 13 is arranged on the scraper frame 12 so as to perform the operation at a location where a tank-like portion is most likely to occur in the belt 2.

The scraper blade 13 is also adapted to minimize damage to the clips connecting the ends of the belt 2.

That is, the distal end of the scraper blade 13 is chamfered to allow easy passage of a clip across the scraper blade. Moreover, the scraper blade 13 is arranged so that it does not present a flat opposite surface to the approaching clip. The scraper blade 13 is movable with respect to the support frame 11, and when the scraper blade 13 collides with the clip, it contacts the belt 2 and is elastically shifted to a biased state, so that the impact of the collision is generally absorbed and transferred to the clip. damage is reduced.

The preferred embodiment described above includes six scraper blades 13. However, the object of the invention can also be achieved with as few as three scraper blades 13 arranged in the same way.

(Effect of the invention) The scraper blade 13 is slidably mounted on the supporting member I in the longitudinal direction.
5 and secured in place.

Thereby, replacing the scraper blade 13 is easy and convenient.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conveyor belt cleaning device according to the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a side view thereof.

Claims (6)

[Claims] (1) In a device for cleaning a flexible flat belt of a conveyor device, a support means by which the cleaning device is secured relative to the structure of the conveyor device, and a scraper rotatably supported on the support means. a frame, and at least three elongated scraper blades, with each scraper blade extending in a plane generally parallel to the belt, generally spaced from the axis of rotation of the scraper frame, and within a radius of rotation of the scraper frame. A conveyor belt cleaning device characterized in that it extends in a transverse direction. (2) The conveyor belt cleaning device according to claim 1, wherein the scraper blade of the scraper frame comes into contact with the conveyor belt and is shifted to a biased state by the support means. (3) The scraper frame comprises a central portion and a plurality of scraper supporting members attached to the central portion to support the scraper blade and extending in the same space together with the central portion. Conveyor belt cleaning equipment. (4) that each support member is attached to the central portion via a radially extending spoke having a predetermined length, and that the support members generally extend perpendicularly to the spokes and communicate with each other; The conveyor belt cleaning device according to claim 3, characterized in that: (5) One end of each support member is connected to the intermediate portion of the adjacent support member, and the other end of the support member protruding outward is connected to the other end of the adjacent support member by a connecting member. The conveyor belt cleaning device according to claim 4, characterized in that: (6) Conveyor belt cleaning according to claim 3 or 4, characterized in that the scraper blade is removably attached to the support member and is removable in a direction generally parallel to the plane of the belt. Device.