JP6936446B2 - Bucket conveyor device - Google Patents

Description

The present invention relates to a lifting bucket conveyor device capable of continuously transporting powders and granules such as coal, gypsum, and wood.

A bucket conveyor (also called a bucket elevator) is a device that vertically conveys powdered coal, gypsum, wood flour, grains, and the like.
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 attached in an annular shape along the outer circumference of the pulleys. A plurality of buckets are attached to the chain at predetermined intervals. Then, when the pair of upper and lower pulleys are rotated, the chain rotates in the vertical direction, and the bucket also rotates along the rotation direction of the pulleys.

When the bucket conveyor having such a configuration receives the powder or granular material to be the conveyed material inside the bucket that moves from the lower part to the upper part of the casing, the conveyed material can be conveyed upward with the movement of the bucket.
At this time, since the conveyed material is powdery or granular, the powdery or granular material that did not enter the bucket remains at the bottom of the casing. A gap is provided between the tip of the bucket and the bottom of the casing to prevent metal contact. Similar gaps are provided on both sides of the rotating bucket, and the powder particles that did not enter the bucket invade the gaps and remain at the bottom of the casing.

For this reason, the powder or granular material remaining on the bottom of the casing had to be scraped out at the end of the transport operation.
In particular, when the powder or granular material is flammable such as wood powder or coal powder, it is altered by the frictional heat between the powder or granular material remaining on the bottom of the casing and the rotating bucket, and is deposited or stuck to the bottom of the casing, or in the worst case. There was a risk of ignition. Therefore, it is necessary to discharge and clean the powder or granular material remaining on the bottom of the casing not only after the operation is completed but also during the operation.

Therefore, conventionally, an air outlet is attached to the bottom of the casing to blow compressed air onto the remaining powder or granular material during operation or stop, or a discharge port that can be opened and closed is provided in a part of the bottom, and this is performed after the work is completed. The powder or granular material remaining from the discharge port was discharged to the outside to prevent the powder or granular material from accumulating.
The bucket conveyor device disclosed in Patent Document 1 has a structure in which the bottom of the casing is formed in a curved shape along the rotation locus of the tip of the bucket and is divided, and the bottom is opened and closed to allow the remaining powder or granular material to be exposed to the outside. It is discharging.

Japanese Patent No. 30050503

However, the structure of the bottom of the casing of Patent Document 1 is similar to the structure of the conventional fixed bottom, and has a structure in which a gap is provided so as not to come into contact with the tip of the bucket. There was a risk that it would be pinched between the tip and bottom and bitten and damaged, or that the motor would be overloaded and automatically stopped (tripped). In particular, when the powder or granular material is a pellet or the like, if it is pinched, it shatters into 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 to the entire bottom is required, which increases the operating cost. Further, the blown-up powder may adhere to the sliding parts of the chain or machine parts and cause wear, and the powder that has absorbed the lubricating oil may easily promote combustion.

Therefore, in view of the above-mentioned problems of the prior art, it is an object of the present invention to provide a bucket conveyor device capable of removing powders remaining on the bottom of the casing without manpower and avoiding dangers such as heat generation and combustion.

As a first means for solving the above problems, the present invention presents a box-shaped casing, a drive unit installed above the casing, a driven unit installed below the casing, the drive unit, and the above. It is equipped with a chain that is connected to the driven part and moves around, and a bucket that is installed on the chain.
The casing has a bottom portion formed in a curved shape along the rotation locus of the tip of the bucket below the driven portion.
It is an object of the present invention to provide a bucket conveyor device characterized in that a plurality of plates are flexibly connected to each other and a gap through which powder passes is provided between the plates.
According to the first means, the powder can be discharged downward from the gap between the tip of the bucket and the bottom of the casing during the operation without manpower. Therefore, stable operation can be performed by avoiding the danger that the powder remaining on the bottom generates heat and burns. Further, the reaction force can be weakened by receiving this reaction force with a bendable plate at the position where the reaction force at the tip of the bucket for scooping the powder or granular material is the highest.

As a second means for solving the above-mentioned problems, the present invention is characterized in that, in the first means, the plate at the bottom is provided at a position where the bucket scoops powder or granular material. To provide the equipment.
According to the second means, the reaction force can be weakened by receiving the reaction force at the position where the reaction force at the tip of the bucket for scooping the powder or granular material is the highest with a bendable plate, and the powder particles can be formed in the gap. It is possible to prevent the body from being pinched and damaged, or the motor of the drive unit being overloaded and stopping operation.

As a third means for solving the above-mentioned problems, in the first or second means, the upper surface of the plate is provided with wear-resistant protrusions along the rotation locus of the bucket. It is an object of the present invention to provide a bucket conveyor device characterized by the above.
According to the third means, it is possible to prevent or reduce the bucket tip from coming into contact with the upper surface of the plate due to the elongation of the chain to be damaged or worn, and to prolong the operating time.

As a fourth means for solving the above-mentioned problems, in the first to third means, the casing receives the powder falling from the gap below the bottom portion and has a slope. It is an object of the present invention to provide a bucket conveyor device characterized in that a chute capable of discharging to the outside is provided along the line.
According to the fourth means, since the powder generated during the operation can be automatically discharged to the outside without human intervention, the work of stopping and discharging the device is eliminated, and the operating time can be extended. .. In addition, the powder in the gap can be removed during operation without stopping the device.

According to the present invention according to the above configuration, the powder can be discharged downward from the gap between the tip of the bucket and the bottom of the casing during the operation without manpower. Therefore, stable operation can be performed by avoiding the danger that the powder remaining on the bottom generates heat and burns.

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

An embodiment of the bucket conveyor device of the present invention will be described in detail below with reference to the drawings. The powder or granular material to be transported according to the present invention is a biomass pallet formed by solidifying wood powder, crushed thinned wood, crushed wood chips, wood pellets, wood waste, wood construction waste, coal powder, flammable plastic. , Paper and other flammable materials are targeted.

[Bucket conveyor device 10]
FIG. 1 is an explanatory view of the bucket conveyor device of the present invention. The bucket conveyor device 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 above the casing 12, a driven unit 14 installed below the casing 12, and a drive unit and a driven unit 14. A chain 16 that moves around the chain 16 and a bucket 18 that is installed on the chain 16 are provided, and the casing 12 is provided with a bottom portion 20 that is formed in a curved shape along the rotation locus of the tip of the bucket 18 below the driven portion 14. There is. A predetermined gap is provided so that the tip and bottom 20 of the bucket 18 that orbits the driven portion 14 do not come into contact with each other.

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

The gap 24 is set to a length through which the powder particles generated by the powder particles sandwiched between the tip end and the bottom portion 20 of the bucket 18 can pass. As for the connection between the adjacent plates 22, the connecting plates 26 are rotatably connected to both end surfaces around the axis along the longitudinal direction of the plates 22. As a result, a part of the bottom portion 20 formed by using the plurality of plates has a structure that can be bent along the rotation locus of the tip of the bucket 18.

The plate 22 of the bottom 20 of the present embodiment is provided at a position where the bucket 18 scoops the powder or 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 comparing it to a clock face centered on the axis. The bucket 18 rotates from the 3 o'clock direction to the 9 o'clock direction from the descending direction to the ascending direction via 6 o'clock. At this time, the bucket 18 scoops the powder or granular material accumulated in the bottom 20 in the process from the descent to the ascending direction and conveys it upward. Then, when the bucket 18 is inverted in the process of passing through the drive unit on the upper part of the casing 12, the powder or granular material inside falls in the direction of gravity and is handed over to the subsequent process. The bucket 18 is continuously transported by the continuous motion.

The empty bucket 18 performs an operation of scraping the powder or granular material accumulated in the range of 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 direction of gravity of the powder or granular material and the direction of travel of the bucket 18 are the same, and the powder or granular material moves in the direction of 6 o'clock.
Next, in the process of rotating the bucket 18 from the 6 o'clock position to the 9 o'clock position, the powder or granular material is scooped inside. In this range from 6 o'clock to 9 o'clock, the bucket 18 rotates in the direction opposite to the direction of gravity of the powder or granular material, so that the larger the accumulated amount of the powder or granular material combined with the abducted powder or granular material, the more it can be scooped inside. .. Here, the reaction force of scooping the powder or granular material acting on the tip of the bucket 18 increases between the 6 o'clock position and the approximately 8 o'clock position. At this time, the rotational power of the bucket 18 is transmitted to the bottom 20 via the powder or granular material. In other words, as for the rotational force at the tip of the bucket 18, the force acts on the powder or granular material in the tangential direction and the centrifugal direction of the driven portion, and the powder or granular material enters the inside of the bucket 18 by the reaction force of the bottom portion 20.
Then, 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 direction of gravity of the powder or granular material, and the force for pressing the bottom portion 20 is also lost. Even when pebbles or the like are sandwiched, the upper surface of the bottom portion 20 is slid and moved upward.

In the conventional fixed bottom, the powder or granular material 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 pinched, they are often bitten within this range. In addition, the sandwiched powder or granular material is shattered and a large amount of powder is generated.
On the other hand, the bottom 20 of the present invention has a plurality of plates 22 installed at positions from 5 o'clock to 8 o'clock. The plurality of plates 22 are configured to be bendable by providing a gap 24 between the plates 22. Therefore, in the range from 6 o'clock to 8 o'clock when the force for pressing the bottom portion (rotational power) becomes large, the bottom portion moves in the centrifugal direction and the powder or granular material is compressed, and it becomes difficult to generate powder that shatters. Further, due to the bent shape of the bottom portion 20, only the tip of the bucket 18 approaches the bottom portion, and the plate 22 approaches the axial direction of the driven portion between the buckets 18, so that the powder or granular material of the bottom portion 20 moves and the bucket It becomes easy to be scooped up by 18.

Further, even if pebbles or the like mixed in the powder or granular material are sandwiched between the tip and the bottom 20 of the bucket 18, the plate 22 does not move in the direction away from the axial center of the driven portion 14 and does not lock, and the bucket 18 does not lock. It is possible to move the bottom portion 20 from 8 o'clock to 9 o'clock when the pressing force (rotational power) is small by the rotation of. As a result, damage, wear, etc. of the bottom 20 or the bucket 18 can be avoided or reduced, and the operating time can be extended.
Further, the powder content of the powder or granular material is not dropped downward from the gap 24 between the plates 22 and the powder content does not remain on the bottom. As a result, heat generation and combustion of the powder remaining on the bottom 20 can be avoided.

A wear-resistant protrusion 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. For the protrusion 28, a material having low wear resistance or slip resistance, for example, a metal, a wear-resistant synthetic resin, or the like can be applied.
With such a configuration of the protrusion 28, it is possible to prevent or reduce the bucket tip from coming into contact with the upper surface of the plate due to the elongation of the chain and being damaged or worn, so that the operating time can be extended.

[Shoot 30]
The casing 12 is provided with a chute 30 below the bottom portion 20 that receives powder falling from the gap 24 and can discharge the powder to the outside along the slope. The chute 30 uses a member having a low slip resistance and is tilted at a predetermined angle to facilitate the downward movement of the fallen powder. Further, the chute 30 is provided with a powder collection container 32 discharged downward.
It is also possible to adopt a configuration in which an air outlet is provided to blow compressed air downward along the slope for the powder that has fallen on the upper surface of the chute 30. In addition to this, it is also possible to adopt a configuration in which the air outlet is attached so as to blow compressed air from below the bottom 20 toward the gap 24, and the powder is pushed back onto the bottom 20.
With such a configuration of the chute 30, the powder generated during the operation can be automatically discharged to the outside without human intervention, so that the work of stopping and discharging the device is eliminated and the operating time can be extended. .. In addition, the powder in the gap can be removed during operation without stopping the device.

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

According to the present invention as described above, the powder can be discharged downward from the gap between the tip of the bucket and the bottom of the casing during the operation without manpower. Therefore, the powder remaining on the bottom avoids dangers such as heat generation and combustion, and stable operation can be performed.
The preferred embodiment of the present invention has been described above. However, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention.
Further, 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 ……… Protrusion,
30 ……… Shoot, 32 ……… Collection container.

Claims (4)

A box-shaped casing, a drive unit installed on the upper part of the casing, a driven part installed on the lower part of the casing, a chain connected to the drive part and the driven part and moving around, and a chain installed on the chain. Equipped with a bucket
The casing has a bottom portion formed in a curved shape along the rotation locus of the tip of the bucket below the driven portion.
The bottom portion is a bucket conveyor device characterized in that a plurality of plates are flexibly connected and a gap through which powder passes is provided between the plates. The bucket conveyor device according to claim 1, wherein the plate at the bottom is provided at a position where the bucket scoops powder or granular material. The bucket conveyor device according to claim 1 or 2, wherein wear-resistant protrusions are provided on the upper surface of the plate along the rotation locus of the bucket. The casing according to any one of claims 1 to 3, wherein the casing is provided below the bottom portion with a chute capable of receiving the powder falling from the gap and discharging it to the outside along a slope. Bucket conveyor device.

Images