JP2001114417A - Scraper type belt cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scraper type cleaner that is efficient in scraping work or that is improved in the close contact of its cleaner edge portions with a belt conveyor and is protected against an accumulation of such deposits as ore on its cleaner edge faces in scraping work. SOLUTION: The scraper type cleaner for a belt conveyor presses its scrapers against the belt surface of the belt conveyor to remove deposits therefrom. The scrapers having an edge at the point are arranged in an oblique relation to the direction of belt travel. A snap pulley and a pressure roller are disposed upstream and downstream of the scrapers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scraper type belt cleaner for scraping off deposits attached to a belt surface of a belt conveyor used for transporting raw materials.

[0002]

2. Description of the Related Art Conventionally, raw materials such as ore, cement, coal, coke and the like have been transported in the form of powder and / or granules on a belt conveyor. This is a phenomenon that cannot be achieved. The deposits not only reduce the amount of transport of the belt conveyor, but also cause the deposits on the surface of the return belt to fall, deteriorating the working environment due to dust, and causing the accumulated deposits to accumulate and damage the belt. Occurred. In addition, it is necessary to perform a process of collecting fallen objects, resulting in an increase in cost.

[0003] For this reason, it is common practice to provide a belt cleaner in order to remove deposits on the belt surface of the belt conveyor.

[0004] As this type of belt cleaner, a scraper type in which a fixed scraping plate is pressed against the belt to scrape off the deposits with the scraper plate, a brush type in which a brush is brought into contact with the belt to remove the deposits, or the like, is used. Although there is a fluid type that removes deposits by spraying a high-pressure fluid, each has its own advantages and disadvantages, and there is no satisfactory belt cleaner yet.

FIG. 1 is a view showing a conventional scraper type belt cleaner.

As shown in FIG. 1A, a conventional scraper-type cleaner is provided with a cleaner 1 (a scraping plate) under a return belt 2 perpendicular to a traveling direction of a belt conveyor indicated by an arrow. The ore and the like adhering to the belt surface are scraped off by the cutting edge of the blade.

However, in this type of cleaner, if the contact force between the cutting edge and the belt is increased in order to increase the scraping efficiency, the frictional force becomes too strong and the belt breaks, so that the contact force between the cutting edge and the belt is increased. Working with weakness. Therefore, as shown in FIG. 1 (b), as the adhered material is scraped off by the blade edge, the adherence 4 such as ore or the like is accumulated on the cleaner blade front surface because the contact force is weak, and the belt 2 is pushed up to make contact with the belt surface. Adhesion with the cutting edge is reduced, the cleaning effect of the cleaner is reduced, and no result can be obtained. Alternatively, as shown in FIG. 1 (c), as the scraping effect of the cleaner is reduced, the ore 4 or the like stagnating at the blade edge of the cleaner causes the blade edge surface 3 of the cleaner to fall, and the blade edge stays without abrasion. Ore or the like serves as a cleaner blade edge, and there is a problem that a problem occurs in that no scraping result is obtained at all.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and has an object to improve the adhesion of a cleaner blade tip to a belt conveyor and to provide a cleaner blade with a cleaner blade tip during scraping. An object of the present invention is to provide a scraper-type cleaner having a high scraping efficiency and capable of preventing stagnation of deposits such as ores.

[0009]

SUMMARY OF THE INVENTION The present invention is to obliquely move the belt conveyor in the traveling direction in order to reduce the resistance when scraping ore or the like adhered to the belt surface and to suppress the load on the blade edge. The present invention was completed by paying attention to providing a cleaner blade tip.

The gist of the present invention is as follows.

(1) A scraper-type cleaner for a belt conveyor for pressing a scraping plate against the belt surface of a belt conveyor to remove deposits adhered to the belt surface, wherein a plurality of scraping plates each having a blade at a tip end. A scraper type cleaner characterized by arranging at a slant with respect to the traveling direction of the belt and arranging a snap pulley and a pressing roller before and after the scraping plate.

(2) The plurality of scraping plates are supported by a supporting member, and the supporting member is supported by an elastic body such that the plurality of scraping plates press the belt surface. The scraper-type cleaner according to the above (1), which is characterized in that:

(3) The scraper type as described in (1) or (2) above, wherein the scraping plate is detachably mounted and has a plurality of blade edges divided in the width direction. cleaner.

(4) The scraper-type cleaner according to the above (3), wherein at least a tip portion of the cutting edge portion is formed of a wear-resistant material.

(5) The scraper-type cleaner according to the above (3) or (4), wherein both sides of the blade edge portion are rounded.

(6) The scraper according to any one of (1) to (5), wherein the scraping plate is disposed obliquely with respect to a belt traveling direction and obliquely with respect to a vertical direction. The scraper type cleaner according to any one of the above.

(7) The scraper according to any one of (1) to (6), wherein the scraper is disposed at a fixed angle within a range of 40 to 50 degrees with respect to a belt traveling direction. A scraper-type cleaner described in Crab.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is a diagram showing the general outline of a scraper type cleaner for a belt conveyor according to the present invention. FIG.
FIG. 1 is a sectional view showing an outline of a whole of a scraper type cleaner of a belt conveyor.

As shown in FIGS. 2 and 3, the belt 2 of the belt conveyor is driven by a driving pulley 5, and the belt that has transported the raw material such as ore is turned as a return belt. A scraper-type cleaner 1 is provided below the return belt to remove extraneous matter adhering to the belt surface. The belt is pushed up below the belt in front of the cleaner to make the curved surface of the belt flat. Snap pulley 6 acting to correct
Is installed, and on the upper side of the belt behind the cleaner,
A pressing roller 7 that presses the belt to flatten the curved surface of the belt and adjusts the adhesion between the belt and the blade edge of the cleaner is provided. Blade edge 8
Are supported by the support member 10 and are disposed obliquely with respect to the traveling direction of the belt.

The support member 10 is made of an elastic material (such as a spring).
11 and is suspended by the holding frame 12 of the gantry.
The column 1 is provided via the arm member 13 so as to be movable up and down.
4 attached.

FIG. 4 is a diagram showing an example of a mounting structure of a support member for supporting a scraping plate to a holding frame.

As shown in FIG. 4, an end of the support member 10 is inserted into a cylindrical holding member 15 joined to the tip of the arm member 13, and 10 is rotatably held by the arm member 13.
The other end of the arm member 13 is rotatably attached to a support at a fulcrum 16 of the arm member. Further, the support member is held by the holding member 15 by tightening a bolt 17 so that the support member does not fall off the holding member. Also, the hook 10 provided on the cylindrical holding member,
When the spring 19 attached to the holding frame 12 is hooked, the support member is hung by the holding frame via the spring, becomes vertically movable, and is urged upward by the spring. Therefore, the scraping plate 9 provided on the support member presses the belt surface, and can effectively scrape off the deposits on the belt surface. In addition, the pressing force on the belt surface of the scraper, which affects the scraping efficiency, can be easily adjusted by adjusting the strength of the spring, and the cleaner cutting edge is prevented from being naturally worn by use. Although the pressing force has to be finely adjusted according to the wear, it can be automatically adjusted by using a spring.

In the conventional cleaner, the pressing force cannot be increased due to belt damage or the like, and it is difficult to easily adjust the pressing force. It was causing deterioration.

In the above example, a spring is used as the elastic body. However, the elastic body may be any material having elasticity, such as rubber or a leaf spring. Alternatively, the pressing force can be electrically adjusted. Further, instead of suspending the support on the holding frame, the support may be supported from below.

Next, a description will be given of one of the features of the present invention, in which a plurality of scraping plates each having a blade provided at the tip end are arranged obliquely to the traveling direction of the belt.

As described with reference to FIG. 1, in the cleaner in which the scraping plate is arranged perpendicular to the traveling direction of the belt, deposits such as ore and the like adhered to the belt surface stay at the edge of the blade to push up the belt and adhere. Or the blade edge face was tilted, so that good scraping efficiency could not be achieved.

In view of this, the present invention focuses on reducing the load applied to the blade edge, and by arranging the scraper of the cleaner obliquely with respect to the traveling direction of the belt, a scraper-type cleaner having good scraping efficiency can be obtained. completed.

FIG. 5 is a schematic view showing the flow of the deposit on the belt surface to the diagonal scraping plate.

As shown in FIG. 5, since the scraping plate provided with the cutting edge is arranged diagonally, the adhered matter flows in the direction of the arrow when it comes into contact with the scraping plate 9. For this reason, stagnation of the adhering matter at the cutting edge is reduced, and the scraping plate can reduce the pushing force received from the adhering matter. Further, abrasion resistance between the belt and the cutting edge can be reduced.

As the inclination angle of the scraping plate increases from 0 ° to 90 ° with respect to the traveling direction of the belt, the force which the scraping plate receives from the attached matter increases. Therefore, considering only the force received from the adhered substance, it is preferable that the inclination angle of the scraping plate is small, but it becomes necessary to dispose a very large number of scraping plates in order to scrape the entire belt, which greatly increases the cost. In addition, there are significant disadvantages in terms of device design.

In view of the ease of maintenance of the apparatus and the scraping efficiency, it is preferable that the number of scraping plates is 2 to 3 corresponding to the width of the belt, and the inclination angle is 40 to 50.
Degree, particularly preferably 45 degrees. However, this value varies depending on the strength of the adhesion of the transport material to the belt, and is not limited to this value.

FIG. 6 is a view showing an example in which three scrapers are obliquely arranged on the cleaner.

As shown in FIG. 6, the scraping plate is
And three pieces are joined so that the entire belt width can be scraped off. This joining method can be carried out by commonly used welding or mechanical joining means. The scraper is provided with a holder 20 and a blade portion 8, and the blade portion is detachably mounted on the holder. That is, the blade edge portion 8 is fitted into the groove 21 formed in the holder, and is fixed by the bolt 22. In addition, if the structure of the replaceable cutting edge portion is configured by dividing the cutting edge portion into a plurality of pieces in the width direction, when the cutting edge portion of a specific portion is worn out, only the cutting edge portion of that portion can be replaced. It is preferable from the viewpoint of maintenance and cost to adopt a structure in which the entire blade edge portion is divided into a plurality of blades rather than one.

In addition, since the blade edge is inclined with respect to the traveling direction of the belt, the belt may be damaged by both sides of the blade edge. Therefore, as shown in FIG. 6B, it is preferable to insert the roundness 23 on both sides of the cutting edge 8.

As the material for the cutting edge, a soft material such as rubber is easily deformed and cannot be used, and a known wear-resistant material such as steel or hard alloy having excellent wear resistance can be used. Further, as shown in FIG. 6C, it is preferable that the base of the cutting edge is made of an inexpensive steel plate 24 and the like and the tip 25 is made of a wear-resistant material joined to the cutting edge, because the cost is low and the cost is low.

As shown in FIG. 6A, when the scraper is disposed obliquely, the cleaner can be used regardless of whether the belt rotates forward or backward.

Further, in the present invention, the scraping plate is disposed obliquely in the traveling direction of the belt. However, as shown in FIG. 8, the scraping plate may be further disposed obliquely inclined with respect to the vertical direction.
By tilting the scraper vertically in this way,
Deposits on the scraped belt surface can be easily removed from the cutting edge 8.

Next, the adhesion between the scraper and the belt will be described.

FIG. 7A is a cross-sectional view showing a curved state of the belt conveyor during normal transportation, and FIG. 7B is a cross-sectional view showing a bent state of the return belt.

As shown in FIG. 7A, the belt of the belt conveyor curves in a concave shape during normal transportation, moves on the roller 26 so that the raw material (ore) 4 is not spilled, and returns to the return belt. Even after that, as shown in FIG. 7B, it moves while maintaining its curved shape.

Therefore, even if the scraper is pressed against the lower surface of the return belt in a direction perpendicular to the traveling direction of the belt, a gap 27 exists between the belt and the scraper, and the adhesiveness of the scraper is poor and the scraper is inefficient. The belt cannot be scraped off.

However, when the scraping plate is arranged obliquely to the traveling direction of the belt as in the present invention, a gap is hardly formed between the blade edge of the scraping plate and the belt even if the belt is curved, and the blade edge and the belt are hardly formed. And the contact time between the belt and the blade edge portion is prolonged, so that the scraping efficiency is significantly improved.

For example, the belt speed is 2 m / sec, the belt width is 1800 mm, the transported material is ore (Karajas F),
A comparison is made between a vertical cleaner having a blade edge perpendicular to the belt traveling direction and an oblique cleaner having a blade edge inclined at an angle of 45 degrees under a condition of a cleaner blade edge width of 3.0 mm. The contact time between the cleaner and the belt is 1.4 times longer with the oblique cleaner, and the scraping efficiency is improved. Also, the oblique-type cleaner has about 30% more pressing force of the blade edge of the cleaner against the powder adhering to the belt.
As a result, the cleaner blade tip is less likely to twist or fall, so that the pressing force against the belt can be increased and the scraping efficiency can be improved.

Further, in the present invention, since the curved surface of the return belt is corrected to be a flat surface, as shown in FIGS.
The snap pulley 6 is installed in front of the cleaner, and the press roller 7 is installed behind the cleaner. The return belt is pushed up from below by the snap pulley, and the return belt is pressed down by the press roller. That is, when the belt is pushed up by the snap pulley, tension is applied to the belt between the drive pulley and the snap pulley, and the belt is flattened by correcting its curvature. Since the flattened belt is pressed by the pressing roller, it does not return to the curved state. Therefore, the blade tip of the scraper, which is arranged diagonally, can come into contact with the flat return belt, and the belt keeps its position and tension constant by the snap pulley and the holding roller, and the belt sags. Since no rubbing occurs, the pressing force between the blade edge of the scraping plate and the belt can be made constant, the adjustment of the pressing force becomes easy, and the scraping efficiency can be further improved.

[0046]

According to the present invention, the adhesiveness of the cleaner blade tip to the belt conveyor can be improved, and the accumulation of deposits on the cleaner blade tip during scraping can be prevented, and the load on the blade tip can be reduced. It is possible to obtain a scraper-type cleaner having a high removal efficiency.

Further, according to the present invention, it is easy to adjust the pressing force of the cutting edge against the belt surface, and even if the cutting edge is worn, only the cutting edge of the worn portion can be replaced. Since the tip is made of a wear-resistant material, the cutting edge is hardly worn. Further, since the both sides of the cutting edge are rounded, there is an effect that the belt is not damaged.

[Brief description of the drawings]

FIG. 1 is a view showing a conventional scraper type belt cleaner.

FIG. 2 is a diagram showing an overall outline of a scraper type cleaner for a belt conveyor according to the present invention.

FIG. 3 is a cross-sectional view showing the general outline of a scraper type cleaner of a belt conveyor.

FIG. 4 is a diagram showing an example of a mounting structure of a support member supporting a scraping plate to a holding frame.

FIG. 5 is a schematic diagram showing a flow of a deposit on a belt surface with respect to a diagonal scraping plate.

FIG. 6 is a diagram showing an example in which three scrapers are arranged diagonally on a cleaner.

FIG. 7A is a cross-sectional view illustrating a curved state of the belt conveyor during normal transportation, and FIG. 7B is a cross-sectional view illustrating a bent state of the return belt.

FIG. 8 is a diagram showing an example in which a scraping plate is arranged obliquely in the belt traveling direction and obliquely in the vertical direction.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cleaner 2 Belt 3 Blade tip surface 4 Ore (adhered matter) 5 Drive pulley 6 Snap pulley 7 Holding roller 8 Blade tip 9 Scraper 10 Support member 11 Elastic body 12 Holding frame 13 Arm member 14 Support 15 Holding member 16 Support point 18 Support point 18 Bolt 19 Hook 20 Spring 21 Groove 22 Bolt 23 Roundness 24 Steel plate 25 Tip 26 Roller 27 Clearance

Claims (7)

[Claims] 1. A scraper-type cleaner for a belt conveyor, which presses a scraping plate against a belt surface of a belt conveyor to remove deposits adhering to the belt surface. A scraper-type cleaner characterized by being disposed obliquely to a belt traveling direction, and having a snap pulley and a pressing roller disposed before and after a scraping plate. 2. The method according to claim 1, wherein the plurality of scraping plates are supported by a supporting member, and the supporting member is supported by an elastic body so that the plurality of scraping plates presses a belt surface. The scraper-type cleaner according to claim 1, wherein: 3. The scraper-type cleaner according to claim 1, wherein the scraper is detachably mounted and has a plurality of blade edges divided in a width direction. 4. The scraper-type cleaner according to claim 3, wherein at least a tip portion of said cutting edge portion is formed of a wear-resistant material. 5. The scraper-type cleaner according to claim 3, wherein both sides of the blade edge portion are rounded. 6. The scraper according to claim 1, wherein the scraper is disposed obliquely with respect to a belt traveling direction and obliquely with respect to a vertical direction. The described scraper-type cleaner. 7. The scraper according to claim 1, wherein the scraper is disposed at a constant angle within a range of 40 to 50 degrees with respect to a belt traveling direction. Scraper type cleaner.