JP2019156634A - Bucket conveyor device - Google Patents

Abstract

To provide a bucket conveyor device capable of avoiding the risk of heat generation, combustion, etc. by removing powder remaining in a bottom part of a casing without manual operation.SOLUTION: A bucket conveyor device 10 of the present invention comprises: a box-shaped casing 12; a driving part set at an upper part of the casing 12; a driven part 14 set at a lower part of the casing 12; a chain 16 which is connected to the driving part and the driven part 14 to move circularly; and a bucket 18 set at the chain 16. The casing 12 has a bottom part 20 which is formed into a curved shape along a rotary locus of a tip end of the bucket 18 below the driven part 14. The bottom part 20 is constituted by bendably connecting a plurality of plates 22, and further gaps 24 through which powder passes are provided each between the plates 22.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a lifting-type bucket conveyor device capable of continuously conveying powder particles such as coal, gypsum, and wood.

There is a bucket conveyor (or a bucket elevator) as a device that conveys powdered coal, gypsum, wood flour, cereals and the like in the vertical direction.
In the bucket conveyor, a pair of pulleys are arranged side by side in the vertical direction of the casing, and an endless chain or belt is annularly attached along the outer periphery of the pulleys. A plurality of buckets are attached to the chain at predetermined intervals. When the pair of upper and lower pulleys are rotated, the chain is rotated in the vertical direction, and the bucket is also rotated in the rotation direction of the pulley.

If the bucket conveyor of such a structure receives the granular material used as a conveyed product in the bucket which moves to the upper part from the lower part of a casing, it can convey a conveyed product upward with the movement of a bucket.
Since the conveyed product is granular at this time, the granular material which did not enter the bucket remains at the bottom of the casing. A gap is provided between the bucket tip and the casing bottom so as not to contact the metal. Moreover, the same clearance gap is provided also in the both sides of the rotating bucket, The granular material which did not enter into the above-mentioned bucket penetrate | invades in this clearance gap, and it remains on the bottom part of a casing.

For this reason, the granular material remaining on the bottom of the casing has to be discharged by scraping or the like at the end of the conveying operation.
In particular, when the granular material is ignitable, such as wood powder or coal powder, it will deteriorate due to frictional heat of the granular material remaining on the bottom of the casing and the rotating bucket, etc., and deposit or adhere to the bottom of the casing. There was a risk of fire. For this reason, not only after the operation is finished but also during the operation, the powder particles remaining on the bottom of the casing must be discharged and cleaned.

Therefore, conventionally, an air outlet is attached to the bottom of the casing, and compressed air is blown onto the remaining powder during operation or stop, or a discharge outlet that can be opened and closed is provided at a part of the bottom. The powder particles remaining from the discharge port are discharged to the outside so that the powder particles do not accumulate.
The bucket conveyor device disclosed in Patent Document 1 is formed such that the bottom portion of the casing is curved so as to follow the rotation trajectory of the bucket tip, and is divided, and the granular material remaining by opening and closing the bottom portion is exposed to the outside. It is discharging.

Japanese Patent No. 3050503

However, the structure of the bottom portion of the casing of Patent Document 1 is a configuration in which a gap is provided so as not to contact the tip of the bucket, as in the conventional structure of the fixed bottom portion. There is a risk of being damaged by being caught between the tip and the bottom, or that the motor is overloaded and automatically stops (trips). In particular, when the granular material is a pellet or the like, when it is sandwiched, it becomes a powder and becomes a powder, and if it remains on the bottom, it causes heat generation or ignition.
Further, in the configuration in which the air outlet is provided at the bottom of the casing, a power source such as a compressor that covers the amount of air blown over the entire bottom is required, which increases the operating cost. Furthermore, the blown-up powder may adhere to the sliding portions of the chain and machine parts, causing wear, and the powder that has absorbed the lubricating oil may easily promote combustion.

  Therefore, in view of the above-described problems of the prior art, an object of the present invention is to provide a bucket conveyor device that can remove dust remaining on the bottom of a casing without human intervention and avoid dangers such as heat generation and combustion.

As a first means for solving the above problems, the present invention includes a box-shaped casing, a drive unit installed at the upper part of the casing, a driven unit installed at the lower part of the casing, the drive unit, and the A chain connected to the follower and moving around, and a bucket installed on the chain,
The casing has a bottom formed in a curved shape along a rotation trajectory of the tip of the bucket below the follower,
An object of the present invention is to provide a bucket conveyor device characterized in that the bottom portion connects a plurality of plates so as to be bendable and provides a gap between the plates for allowing powder to pass therethrough.
According to the first means, powder can be discharged downward from the gap between the bucket tip and the bottom of the casing during operation, without relying on human hands. Therefore, it is possible to avoid a risk that the powder remaining on the bottom portion generates heat and burns, and a stable operation can be performed. Moreover, the reaction force can be weakened by receiving this reaction force with a bendable plate at a point where the reaction force at the bucket tip that scoops up the granular material is the highest.

As a second means for solving the above-mentioned problems, the present invention provides the bucket conveyor according to the first means, wherein the plate at the bottom is provided at a location where the bucket scoops up the granular material. To provide an apparatus.
According to the second means, the reaction force can be weakened by receiving this reaction force with a bendable plate at the point where the reaction force at the tip of the bucket that scoops up the powder particles is the highest, and the powder particles in the gap It can be avoided that the body is caught and damaged, or that the motor of the drive unit is overloaded and the operation is stopped.

As a third means for solving the above problem, in the first or second means of the present invention, an abrasion-resistant protrusion is provided on the upper surface of the plate along the rotation locus of the bucket. It is providing the bucket conveyor apparatus characterized by these.
According to the third means, it is possible to avoid or reduce the breakage or wear of the bucket tip contacting the upper surface of the plate due to the elongation of the chain, thereby prolonging the operation time.

As a fourth means for solving the above-mentioned problem, in the first to third means, the present invention is characterized in that the casing receives the powder falling from the gap below the bottom portion and is inclined. And providing a bucket conveyor device characterized in that a chute that can be discharged to the outside is provided.
According to the fourth means, since the powder generated during the driving operation can be automatically discharged without relying on the outside, there is no work to stop and discharge the apparatus, and the operation time can be prolonged. . Further, the dust in the gap can be removed during operation without stopping the apparatus.

  According to the present invention having the above-described configuration, powder can be discharged downward from the gap between the bucket tip and the bottom of the casing during operation, without relying on human hands. Therefore, it is possible to avoid a risk that the powder remaining on the bottom portion generates heat and burns, and a stable operation can be performed.

It is explanatory drawing of the bucket conveyor apparatus of this invention. It is explanatory drawing of the plate of this invention.

  An embodiment of a bucket conveyor device of the present invention will be described below in detail with reference to the drawings. The granular material used as the transported material of the present invention is a biomass pallet formed by solidifying wood powder, crushed thinned wood, crushed wood chips, wood pellets, wood scrap, wood building waste, coal powder, flammable plastic Intended for flammable materials such as paper.

[Bucket conveyor device 10]
FIG. 1 is an explanatory view of a bucket conveyor device of the present invention. The bucket conveyor apparatus 10 shown in the figure is a cross-sectional view of the lower part of the casing 12.
The conveyor device 10 of the present invention is connected to a box-shaped casing 12, a drive unit (not shown) installed at the upper part of the casing 12, a driven unit 14 installed at the lower part of the casing 12, and the drive unit and the driven unit 14. The casing 12 is provided with a chain 16 that circulates and a bucket 18 that is installed on the chain 16, and the casing 12 is provided with a bottom portion 20 that is formed in a curved shape along the rotational locus of the tip of the bucket 18 below the driven portion 14. Yes. A predetermined gap is provided so that the tip of the bucket 18 that circulates around the driven portion 14 does not contact the bottom portion 20.

[Bottom 20]
FIG. 2 is an explanatory view of the plate. A part of the bottom portion 20 of the present embodiment is formed so that it can be bent by connecting a plurality of plates 22. As shown in the figure, the plate 22 is a flat steel material having a predetermined rigidity, and a plurality of plates 22 are connected to each other in a curved shape along the rotation locus of the tip of the bucket 18 with a predetermined gap 24 therebetween. ing. Although six plates 22 shown in FIG. 1 are used as an example, the number of the plates 22 can be arbitrarily changed depending on the diameter of the driven portion 14 and the width of the plate 22.

  The gap 24 is set to a length that allows the powder produced by the granular material sandwiched between the tip of the bucket 18 and the bottom 20 to pass through. Adjacent plates 22 are connected to both end surfaces by connecting plates 26 so as to be rotatable about an axis along the longitudinal direction of the plate 22. Thereby, a part of the bottom portion 20 formed using a plurality of plates can be bent along the rotation locus of the bucket 18 tip.

The plate 22 of the bottom portion 20 of the present embodiment is provided at a location where the bucket 18 scoops up the granular material.
Here, the positional relationship of the bucket 18 that moves around the axis of the driven portion 14 will be described below by way of a clock face with the axis as the center of the hand. The bucket 18 rotates from a descending direction to a rising direction from 9 o'clock to 6 o'clock via 6 o'clock. At this time, the bucket 18 crawls and conveys the powder particles accumulated in the bottom portion 20 in the process of going from descending to ascending. Then, when the bucket 18 is reversed in the process of passing through the drive unit at the upper part of the casing 12, the internal granular material falls in the direction of gravity and is delivered to the subsequent process. The bucket 18 is continuously conveyed by the continuous movement.

The empty bucket 18 performs an operation of scraping the granular material accumulated in the range from 3 o'clock to 6 o'clock at the bottom in the process of rotating from the 3 o'clock position to the 6 o'clock position. At this time, the gravity direction of the granular material and the traveling direction of the bucket 18 are the same direction and move in the direction of 6 o'clock.
Next, in the process in which the bucket 18 rotates from the 6 o'clock position to the 9 o'clock position, the powder particles are squeezed into the interior. In the range from 6 o'clock to 9 o'clock, the bucket 18 rotates in the direction opposite to the gravitational direction of the granular material, so that the larger the amount of accumulated particles combined with the scraped granular material, the more it can be scooped inside. . Here, the reaction force for scooping up the granular material acting on the tip of the bucket 18 increases from the 6 o'clock position to the approximately 8 o'clock position. At this time, the rotational force of the bucket 18 is transmitted to the bottom portion 20 through the granular material. In other words, the rotational force at the tip of the bucket 18 is applied to the granular material in the tangential direction and the centrifugal direction of the driven portion, and the granular material enters the bucket 18 by the reaction force of the bottom portion 20.
In the range from the 8 o'clock position to the 9 o'clock position, the bucket 18 rotates in the direction opposite to the gravitational direction of the powder and the force for pressing the bottom portion 20 disappears. Even when pebbles or the like are sandwiched, the upper surface of the bottom portion 20 is moved upward while sliding.

In the conventional fixed bottom portion, the granular material easily moves in the centrifugal direction at the position from 6 o'clock to 8 o'clock and easily enters the bucket 18. And when pebbles or the like are caught, they often bite in this range. In addition, the sandwiched granular material is shattered to generate a large amount of powder.
On the other hand, the bottom portion 20 of the present invention is provided with a plurality of plates 22 at positions from 5 o'clock to 8 o'clock. The plurality of plates 22 are configured to bendable by providing gaps 24 between the plates 22. For this reason, in the range from 6 o'clock to 8 o'clock when the force (rotational power) for pressing the bottom is increased, it is difficult for the bottom to move in the centrifugal direction and the powder particles to be compressed and to be shattered. Further, only the tip of the bucket 18 is close to the bottom due to the bent shape of the bottom 20, and the plate 22 approaches between the buckets 18 in the axial direction of the driven portion. 18 is easily picked up.

Further, even if pebbles or the like mixed in the granular material are sandwiched between the front end and the bottom portion 20 of the bucket 18, the plate 22 does not move and lock in the direction away from the axis of the driven portion 14. Can be moved in the range from 8 o'clock to 9 o'clock with less pressing force (rotational power) of the bottom portion 20. Thereby, damage, abrasion, etc. of the bottom part 20 or the bucket 18 can be avoided or reduced, and operation time can be prolonged.
Further, the powder content of the granular material is not dropped from the gap 24 between the plates 22 and remains at the bottom. Thereby, the heat generation and combustion of the powder remaining on the bottom 20 can be avoided.

A wear-resistant projection 28 is provided on the upper surface of the plate 22. The protrusion 28 is provided on the upper surface of the plate 22 along the rotation locus of the tip of the bucket 18. The protrusion 28 can be made of a material having low wear resistance or slip resistance, for example, metal, wear-resistant synthetic resin, or the like.
With such a configuration of the protrusion 28, it is possible to avoid or reduce the breakage or wear of the bucket tip contacting the plate upper surface due to the elongation of the chain, thereby extending the operation time.

[Shoot 30]
The casing 12 is provided with a chute 30 below the bottom portion 20 that can receive powder falling from the gap 24 and discharge it to the outside along the slope. The chute 30 uses a member with low sliding resistance to make it easy to move the powder that has fallen at a predetermined angle by moving it downward. The chute 30 is provided with a collection container 32 for the powder discharged downward.
It is also possible to employ a configuration in which an air outlet is provided for blowing the powder that has fallen onto the upper surface of the chute 30 downward along the slope. In addition to this, it is also possible to adopt a configuration in which an air blowing port is attached so as to blow compressed air from below the bottom portion 20 toward the gap 24 and the powder content is pushed back onto the bottom portion 20.
With such a configuration of the chute 30, the powder generated during the driving operation can be automatically discharged to the outside without relying on human hands, so there is no work to stop and discharge the device, and the operating time can be prolonged. . Further, the dust in the gap can be removed during operation without stopping the apparatus.

[Height position adjustment section]
A height position adjusting unit that can move up and down by connecting the bearing portion of the driven portion 14 and the bottom portion 20 is provided. The height position adjusting unit is configured such that a frame in which the bearing unit and the bottom unit 20 of the driven unit 14 are integrally formed is movable up and down in the vertical direction.
With such a configuration of the height position adjustment unit, when the driven unit is moved when the chain is stretched and adjusted due to long-term operation, the bottom can be easily adjusted without changing the gap with the preset bottom. It can be moved with.

According to the present invention as described above, powder can be discharged downward from the gap between the bucket tip and the bottom of the casing during operation, without relying on human hands. Therefore, the dust remaining on the bottom avoids dangers such as heat generation and combustion, and stable operation can be performed.
The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
Moreover, the present invention is not limited to the combinations shown in the embodiments, and can be implemented by various combinations.

10 ......... Bucket conveyor device, 12 ... ... Casing, 14 ... Driven part, 16 ... Chain, 18 ... Bucket,
20 ......... Bottom, 22 ......... Plate, 24 ......... Gap, 26 ......... Connecting plate, 28 ......... Protrusions,
30 ... chute, 32 ... collection container.

Claims (4)

A box-shaped casing; a drive unit installed at the upper part of the casing; a driven unit installed at the lower part of the casing; a chain connected to the drive unit and the driven unit; With a bucket,
The casing has a bottom formed in a curved shape along a rotation trajectory of the tip of the bucket below the follower,
A bucket conveyor device, wherein the bottom portion connects a plurality of plates in a bendable manner, and a gap is provided between the plates to allow powder to pass therethrough.   The bucket conveyor device according to claim 1, wherein the plate at the bottom portion is provided at a location where the bucket scoops up the granular material.   The bucket conveyor device according to claim 1 or 2, wherein a wear-resistant protrusion is provided on the upper surface of the plate along the rotation trajectory of the bucket.   4. The chute according to claim 1, wherein the casing is provided with a chute that receives the powder falling from the gap and can be discharged to the outside along a slope. Bucket conveyor device.

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