KR20220155104A - Scraper having prevention damage to conveyor belt - Google Patents

Abstract

The present invention relates to a scrapper having a function for preventing damage when a conveyor belt is moved backward. The scrapper, which is a scrapper of a cleaner installed below a head pulley of a conveyor belt, incudes: a lower body formed to be thick with a support protrusion installed by being inserted into a support groove formed between supports of the cleaner; a middle body having narrow recess parts formed on left and right waist parts, and having a medium thickness of the lower body in a slightly curved shape to be bent forward and backward along a progressing direction of the belt with predetermined elastic strength; and an upper body formed to be relatively thin and having a publicized carbide tip attached to one side of an upper end part to scrap a belt surface. Also, the scrapper includes an auxiliary body coupled to both ends of the scrapper through a fixture and a coupling screw.

Description

Scrapper with anti-damage function when conveyor belt reverses {SCRAPER HAVING PREVENTION DAMAGE TO CONVEYOR BELT}

The present invention relates to a scrapper having a function of preventing damage during reverse movement of a conveyor belt.

Conveyor belts, for example, are very useful for transporting various industrial products, coal, sand, cement, ore, coal ash, grain, garbage, and various loads.

Conveyor belts are used for short-distance transportation in industries or docks, and for long-distance transportation of thousands of meters from mines to transportation points.

In addition, the conveyor belt carries a load of about 1500 kg / ㎥ while maintaining an appropriate concave surface by a drive roller and a plurality of idle rollers, and travels at a high speed of about 0.48 m / sec (100 feet / min) along the track Therefore, the conveyor belt must be provided with robustness corresponding to the load and tension, and therefore, since the equipment is expensive, careful attention is required for safety management.

However, as objects or dust attached to the belt fall due to vibration generated when moving, there is a problem in that the driving mechanism of the belt may be damaged or malfunctioned, and maintenance is required from time to time.

In addition, there is a problem that dust or the like repeatedly falls from the belt around the track through which the belt passes, causing damage to the environment.

As one of means to solve this problem, a cleaner for cleaning the conveyor belt is essentially installed on the conveyor belt.

① A cleaner is installed on the side of the drum-type head pulley of the conventional conveyor belt, and the plate-shaped scrapper of the cleaner contacts the belt at a right angle at the horizontal position of the shaft center of the head pulley, so that when the conveyed object falls from the end point of the head pulley, The object was cleaned. However, when a transported object such as ore falls, it strongly collides with the scrapper, so the scraper is easily damaged and cannot be used for a long time.

② In order to solve this problem, the conventional cleaners shown in FIGS. 6 and 7 have been used. The cleaner (c) has an arm (a) to which the scrapper (s) is attached and a support lever (r) that presses the arm with a constant pressure by an adjusting screw (v) so that the scraper is kept in contact with the belt (b) surface. ) is composed of a ∠ shape and installed on the support frame (f), and a plurality of through holes (h) are arranged in the middle surface of the scrapper (s) so that ore powder can pass through and fall, and the upper end of the scrapper (s) A carbide tip t is attached to increase wear resistance.

The conventional cleaner described above has an advantage in that the ore powder and the like can pass through the through hole (h) formed in the scrapper (s) and fall, compared to the previous cleaner, thereby reducing the collision damage rate. However, since the carbide tip (t) attached to the scrapper (s) is in contact with the surface of the belt (b) at right angles and is strongly pressed and held by the lever (r) and the arm (a) supported by the adjusting screw (v), When the conveyor belt moves in the normal direction, dust attached to the belt may be cleaned. However, when the conveyor is stopped, the belt is pulled down by the load of the object loaded on the upper belt, and when the belt pulley is reversed at a slight angle, the reversed belt is caught on the carbide tip (t) and torn. Repairing or replacing the ruptured belt is very cumbersome and difficult because a load proportional to the length of the belt is applied. Therefore, damage to the belt will give a fatal economic loss.

③ In order to solve this problem, US Patent Registration No. 5310042, Conveyor belt stripper (registration date: May 10, 1994) has been disclosed as prior art. In this invention, the scraper of the cleaner is installed at about 60 degrees below the horizontal axis of the head pulley of the conveyor belt, and the stripper, which is an assembly of this scrapper, is made of a polyurethane resin block body, and this block body is a conveyor belt. When the belt is reversed, it is considered so that it can be flexibly deformed in the retracting direction at the contact angle. That is, an annular hole is formed at an eccentric position in the middle of the stripper block body, so that the narrow width of the block body due to the hole in the block body is easily bent in the reverse direction of the belt when the belt moves backward. In addition, there is an embodiment in which an ∩-shaped leg is formed at the lower end of the block body so that one leg is placed in a free state so that the block body is easily sagged backward.

The conventional prior art described above has the advantage of being installed on the lower side of the head pulley, avoiding the direct drop collision of the conveying object, and the advantage of preventing damage to the belt by bending the stripper block backward when the conveyor belt moves backward. It is true that there is

However, the stripper block body of the conveyor belt according to the above-described invention has insufficient restoring force in which the block deformed in the reverse direction according to the reverse movement of the belt returns to the original position when the belt advances. Therefore, due to the normal return of several blocks and those that did not, the belt surface could not be kept in uniform contact, and the scraping function was deteriorated, making it difficult to cleanly remove dust.

In addition, U.S. Patent No. 5797477, Conveyor belt scraper blade (registration date: August 25, 1998) is a flat plate-shaped support plate integrally formed on the triangular head formed on a flat blade that cleans the conveyor belt, formed at the lower end of the support plate It is installed side by side by inserting the support part into the crossbar. Since the support plate is in the form of a plate, it elastically bends according to the cleaning load of the conveyor belt. There is a problem.

US Patent No. 5310042, Conveyor belt stripper (registration date: May 10, 1994) US Patent No. 5797477, Conveyor belt scraper blade (registration date: August 25, 1998)

In the above invention, the present invention maintains the advantage of avoiding the drop collision of the conveying object by installing the cleaner on the lower side of the head pulley of the conveyor belt in the above invention, while the stopped conveyor belt is deformed in the reverse direction when the conveyor belt is slightly reversed by the load. In order to correct the problem that the scrapper does not return to normal, in the cleaner installed on the lower side of the head pulley of the conveyor belt, the structure of the cleaner's scrapper made of polyurethane material is replaced with a support formed between the supports of the cleaner. A thicker lower body with support jaws for installation in a row in the groove, and a well-rounded inlet on both sides of the waist, in a slightly curved shape so that it can bend back and forth according to the forward and backward movement of the belt while maintaining a certain elastic strength. It was composed of a middle body with a medium thickness and a thin upper body to which a known carbide tip was attached to make good contact with the belt and to scrape the dust attached to the belt.

The cleaner of the present invention is installed on the lower side of the head pulley of the conveyor belt so that the scrapper contacts the belt surface at an inclination angle of about 10 ° C in the moving direction of the belt. At this time, the contact end of the scrapper maintains high wear resistance by the carbide tip, and since the belt is relatively elastic, the belt surface is flexibly scraped by the scrapper as the belt progresses, and dust adhered to the belt surface. This is cleaned cleanly. In addition, since the scrapper bounces with appropriate elasticity in response to the moving vibration of the belt, the contact part between the belt and the scrapper can continue the scraping action without separation.

In addition, when the conveyor stops operating, there is a case where the belt wound on the pulley reverses within a slight range due to the sinking operation by the weight of the object loaded on the upper belt. As it sags in the reverse direction by the carbide tip, the soft end of the opposite upper end is in contact with the belt. Therefore, since there is no unreasonable reverse scripting shape on the surface of the belt during the deformation process of the scrapper, damage to the belt can be prevented. In addition, when the belt progresses in the forward direction, the scrapper is accurately restored to its original state in the forward direction from being deformed in the reverse direction by the elasticity of the heavy body, and the upper body of the scrapper always maintains contact with the belt surface during the restoration process. Provided is a scrapper having a damage prevention function when the belt reverses.

As an embodiment, in the scrapper of the cleaner installed below the head pulley of the conveyor belt, the scrapper having a function of preventing damage when the conveyor belt moves backwards, the support jaw that can be installed in the support groove formed between the supports of the cleaner Thickly formed lower body with; A middle body having a medium thickness of the lower body in a slightly curved shape so that well-rounded indentations are formed in the left and right waist portions, have a predetermined elastic strength, and can be bent back and forth according to the traveling direction of the belt; And a relatively thin upper body to which a known carbide tip is attached to one side of the upper end to scrap the belt surface, and an auxiliary body fastened to both ends of the scrapper through fixtures and fastening screws.

Since the scrapper made of polyurethane resin has the structure as described above, it can be installed and fixed very easily in the support groove between the supports of the cleaner and the installed scrapper does not move or fall out due to stress when it is bent back and forth and maintains a secure state.

In addition, the middle part of the scrapper can be bent back and forth according to the running conditions of the belt while maintaining elastic strength suitable for cleaning, so that the belt is not scratched and damaged, and the scraping function can be maintained for a long time due to good restoring force.

In addition, the carbide tip attached to the upper body of the scrapper comes into contact with the belt only when the belt moves forward and is separated from the belt when the belt moves backward, so that the clipping action is good when the belt moves forward and at the same time it safely protects the belt when the belt moves backward. do.

In addition, since the structure is simple, precision manufacturing is easy, and the use is simple, it has an effect that can be used more safely and conveniently for a long time compared to the conventional ones.

1 is a perspective view of a cleaner of the present invention.
2 is a perspective view of a scrapper of the same cleaner.
3 is a sectional view of the same scraper.
4 is an example of use in which the cleaner of the present invention is installed.
Figure 5a is an exemplary view showing the normal contact state of the scrapper of the present invention to the belt.
Figure 5b is an exemplary view showing the deformation state of the scrapper according to the reverse movement of the belt.
6 is a partial plan view of a conventional cleaner.
7 is an exemplary side view of a conventional cleaner.

The present invention described below may apply various transformations and may have various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description.

However, it should be understood that this is not intended to limit the present invention to specific embodiments, and includes all transformations, equivalents, and substitutes included in the spirit and scope of the present invention. In describing the present invention, if it is determined that a detailed description of related known technologies may obscure the gist of the present invention, the detailed description will be omitted.

Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "include" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

In addition, terms such as first and second may be used to classify and describe various components, but the components should not be limited by the terms. These terms are only used for the purpose of distinguishing one component from another.

In addition, when at least two different embodiments are described in the present application, all or part of the components of each embodiment can be merged and mixed with each other, even if there is no specific description, within the scope of not departing from the technical spirit of the present invention. .

1 is a perspective view of a cleaner of the present invention. 2 is a perspective view of a scrapper of the same cleaner. 3 is a sectional view of the same scraper. 4 is an example of use in which the cleaner of the present invention is installed. Figure 5a is an exemplary view showing the normal contact state of the scrapper of the present invention to the belt. Figure 5b is an exemplary view showing the deformation state of the scrapper according to the reverse movement of the belt.

1 to 5, in the scrapper 4 of the cleaner 3 installed below the head pulley 2 of the conveyor belt 1 to remove dust attached to the belt 1a , The scrapper 4 made of polyurethane resin has a substantially rectangular shape with a support jaw 5a that can be installed in the support groove 3b of the support rod 3a installed in the frame 3f of the cleaner 3. The thick lower body 5 and the well-rounded indentations 6a are formed on the left and right waist portions to maintain a predetermined elastic strength while bending in the direction of the belt in the middle of the lower body in a slightly curved shape. It consists of a middle body 6 having a thickness and a relatively thin upper body 7 in which a carbide tip 7t is attached to one side of the upper end 7a to scrape dust attached to the belt 1a surface. .

In the drawings, reference numeral 8 denotes an auxiliary body of a scrapper, 8a a fixture, 8b a fastening screw, 9 a clamp, 9a a lever, 9b a ring, 9c a hook, and 10 a lift-adjusting screw.

As shown in FIG. 1, the present invention thus formed supports the support step 5a formed on the lower body 5 of the scrapper 4 to the support rod 3a installed on the frame 3f of the cleaner 3. It is inserted into the groove (3b) in a row in turn and installed, and the auxiliary body (8) is inserted together with the fixture (8a) at both ends of the scrapper (4) to fasten and fasten with the fastening screw (8b), and then the conveyor as shown in FIG. The lower side of the head pulley 2 of the belt 1, that is, it is installed inclined in the direction of travel at an angle θ of about 10 ° C from the vertical line ι of the axial center of the head pulley 2.

In addition, the contact strength of the scrapper 4 with respect to the conveyor belt 1a is adjusted by the lifting adjusting screw 10 as in the prior art.

When the conveyor belt 1 is driven and the belt 1a moves forward, the carbide tip 7t of the scrapper 4 contacts the surface of the belt 1a, as shown in FIG. Since the main surface of the solid head pulley 2 serves the belt 1a, the adhesion between the belt 1a and the carbide tip 7t of the scrapper 4 is good, so that the belt is attached to the belt as the belt progresses. Dust is scraped off and removed cleanly.

In addition, the scrapper 4 has a predetermined elastic strength and is in contact with the belt 1a, so that the belt and the scraper are elastically maintained in contact with each other without separation even in the rotational vibration of the head pulley, thereby improving the scraping function. The well-maintained and removed dust falls into the hopper (h) and is collected downward.

When the driving conveyor belt 1 is stopped, the upper belt is pushed downward by the load of the conveying object on the upper belt, and the lower belt is reversed within a slight range by the tensile force. At this time, when the upper end of the scrapper 4 is in close contact with the belt 1a and the belt 1a is reversed together with the head pulley 2, the reverse direction is indicated by the solid line in the normal state indicated by the dotted line in FIG. 5(b). While being refracted, the other corner of the upper end 7a of the upper body 7 of the scrapper 4 comes into contact with the belt. Unlike the carbide tip, this part does not scratch the contact surface of the belt 1a because it is made of a soft polyurethane material. In addition, since concave portions 6a are formed at the left and right waist portions of the middle body 6 of the scrapper 4 and maintain a predetermined elasticity, the curved shape of the scrapper 4 itself facilitates the reverse direction of the belt. It is bent so that it is not scratched, damaged or ruptured by excessive friction with the belt.

When the belt 1a is forwarded forward by the driving of the conveyor belt 1 again, as shown in FIG. The carbide tip 7t attached to the upper body 7 of the ) is in close contact with the surface of the belt 1a to exhibit a cleaning function by scraping. Since the resilience is still maintained despite the scraper's repetitive bending and stretching, there is almost no deterioration in the scrapping function even after long-term use.

The scraper ( 4) keeps the scrapper safely fixed without the lower body 5 falling out of the support groove 3b or moving due to the stress when it bends back and forth.

According to the above described in detail, the scrapper for preventing damage when the conveyor belt moves backward according to the present invention is made of polyurethane resin, and since it has the structure as described above, it is extremely easy to fit into the support groove between the supports of the cleaner. It can be installed and fixed, and the installed scraper does not move or fall out due to stress when it is bent back and forth and maintains a safe state.

In addition, the middle part of the scrapper can be bent back and forth according to the running conditions of the belt while maintaining elastic strength suitable for cleaning, so that the belt is not scratched and damaged, and the scraping function can be maintained for a long time due to good restoring force.

In addition, the carbide tip attached to the upper body of the scrapper comes into contact with the belt only when the belt moves forward and is separated from the belt when the belt moves backward, so that the clipping action is good when the belt moves forward and at the same time it safely protects the belt when the belt moves backward. do.

In addition, since the structure is simple, precision manufacturing is easy, and the use is simple, it has an effect that can be used more safely and conveniently for a long time compared to the conventional ones.

On the other hand, the embodiments disclosed in the drawings are only presented as specific examples to aid understanding, and are not intended to limit the scope of the present invention. It is obvious to those skilled in the art that other modified examples based on the technical idea of the present invention can be implemented in addition to the embodiments disclosed herein.

3...Cleaner 4...Scrapper
5 ... lower body 5a ... supporting jaw
6... Middle body 6a: concave inlet
7... upper body 7t... carbide tip
8... Auxiliary body

Claims (1)

In the scrapper of the cleaner installed on the lower side of the head pulley of the conveyor belt,
A thick lower body having a support jaw that can be inserted into a support groove formed between supports of the cleaner;
A middle body having a medium thickness of the lower body in a slightly curved form so that it can be bent back and forth according to the direction of travel of the belt with a well-rounded concave portion formed in the left and right waist portions and having a predetermined elastic strength; and
A relatively thinly formed upper body with a known carbide tip attached to one side of the upper end to scrape the belt surface,
A scrapper having a function of preventing damage during reverse movement of the conveyor belt further comprising auxiliary bodies fastened to both ends of the scrapper through fixtures and fastening screws.

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