JPH0466769B2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a bucket elevator system.

(Prior art) Bucket elevators used for transporting powder and granular materials including rice grains have flat pulleys (also called internal wheels) supported by bearings at the upper and lower positions of the elevator housing, and the upper and lower flat pulleys are endless. A belt is suspended and supported, and a large number of bucket belts are attached to the outer surface of the endless belt at required intervals.Usually, by driving a flat pulley on the upper side with a motor, the belt is suspended and supported on the outer surface of the endless belt. The function and structure is such that the powder and granules flowing into the bottom of the housing from the input hopper are scooped up one after another into the bucket of the bucket conveyor and transported upwards, and then fed to the next process from the discharge chute at the top of the housing.

(Problem to be solved by the invention) However, when the granular material scooped into the bucket is emptied toward the discharge chute, that is, when the receiving port of the bucket changes direction from upward to downward and is discharged, , a part of the powder falls from the gap of about 10 to 20 mm formed between the bucket conveyor and the elevator housing, flows downward along the back side of the endless belt, and falls on the flat surface of the lower part. It gets caught between the pulley and the back of the belt. In addition, among the powder and granules that are scooped up by the bucket and conveyed upward, the powder and granules that fall from the bucket travel down the back side of the endless belt from between the endless belt and the conveyor housing, and also fall onto the bottom side. It is caught between the flat pulley and the back of the belt.

For this reason, if the conveyed object is rice grain, it will be crushed between the back of the belt and the flat pulley, or if it is other grains, it will be ground into powder, or the conveyed object will be crushed into powder. When the material is powder, transportation losses are unavoidable, such as the powder adhering to the outer peripheral surface of the flat pulley or the back surface of the belt.

(Means for Solving the Problems) Therefore, in the present invention, a discharge chute 14 and an input hopper 13 for the powder and granular material The conveyor pulleys 17, P are rotatably supported at the upper and lower positions of the housing H, and the upper and lower conveyor pulleys 17, P are provided with:
In a bucketed elevator device in which a bucketed conveyor B having a plurality of bucketed belts 16 attached to an endless belt 15 is suspended and supported, firstly, a rotary shaft 19 extending over a lower end of a conveyor housing H is The vane pulley P is inserted and supported, and the configuration of the vane pulley P is fixed at the inner base end portions 2A and 3A of the vane plates 2 and 3 at appropriate intervals on the circumference of the outer periphery on both sides of the rotary disk 1. , the outer end portions 2B of the vanes 2 and 3,
3B protrudes diagonally rearward, and the wing plates 2, 3
is formed into an L-shaped cross section by a vane plate portion 4 extending in the normal direction of the rotary disk 1 and a bottom plate portion 5 extending in a tangential direction of the rotary disk 1. The outermost diameter of the outer end portions 2B, 3B of the plates 2, 3 is smaller than the outermost diameter of the inner base end portions 2A, 3A of the plates 2, 3. A projecting piece 9 is formed at the distal end to protrude laterally, and a space 6 is provided between the bottom plate parts 5 of the front and rear adjacent vanes 2 and 3. , a bucket elevator device is provided which is provided with an air blowing device for blowing up powder and granular material X flowing down to the bottom of a conveyor housing H; A vane pulley P is inserted and supported in the
The configuration of the blade pulley P is arranged such that the inner base end portions 2A, 3A of the vane plates 2, 3 are arranged on the circumference of the outer periphery on both sides of the rotary disk 1.
are fixed at appropriate intervals, and the outer end portions 2B, 3B of the vanes 2, 3 are provided to protrude diagonally rearward, so that the vanes 2, 3 are arranged in a vane section facing in the normal direction of the rotary disk 1. 4 and a bottom plate portion 5 extending in the tangential direction of the rotary disk 1 to form an L-shaped cross section. It is curved into an arcuate shape with the outermost diameter of the outer end portions 2B, 3B smaller than the outermost diameter of the blade, and a space 6 is provided between the bottom plate portions 5 of the front and rear adjacent wing plates 2, 3. In addition, a rotating shaft 27 is supported directly above the rotating shaft 19 of the vane pulley P at a lower position of the conveyor housing H, and a pair of left and right impellers 28 are fitted and fixed to the rotating shaft 27. , a bucket elevator device is also provided, which is constructed so that, by rotating the impeller 28 and the vane pulley P, powder and granular material X flowing down to the bottom of the conveyor housing H is lifted up and collected. .

First, the configuration of the vane pulley P used in the present invention will be explained with reference to the accompanying drawings.

(Example of vane pulley) In FIGS. 1 to 3, reference numeral 1 denotes a disc-shaped rotary disc, which functions as a core disc of the vane pulley P.

Reference numerals 2 and 3 denote vane plates having a substantially L-shaped cross section, and the inner base end portions 2A and 3A of the vane plates 2 and 3 are arranged at appropriate intervals on the circumference of the left and right outer peripheral surfaces of the rotary disk 1. The wing plates 2 and 3 are fixed with outer end portions 2B and 3B projecting diagonally rearward.

The vanes 2 and 3 are composed of a substantially vertical blade portion 4 extending in the normal direction of the rotary disk 1 and a substantially horizontal bottom plate portion 5 extending in the tangential direction of the rotary disk 1. In order to provide the upper end edge 4A of 4 with a pulley function, the outermost diameter of the distal end portions 2B and 3B of the vanes 2 and 3 is made slightly smaller than the outermost diameter of the base end portions 2A and 3A of the vanes 2 and 3. The upper end edge is curved into a small, gentle arc shape, and the plate shapes of the vane plate portion 4 and the bottom plate portion 5 are similarly curved in a slightly twisted shape.

As a result, the falling powder and granular material X is received by the blades 2 and 3, and as the powder and granular material X is rotated, the powder and granular material X is guided diagonally downward while the outer ends of the blades 2 and 3 Discharge from 2A and 3A.

Reference numeral 9 denotes a projecting piece formed at the outer end of the blade plate 4, and is bent and protrudes laterally from the end of the blade plate 4.

6 is the bottom plate part 5 of the wing plates 2 and 3 which are adjacent to each other on the outer circumference.
The powder and granular material X that flows down in the space formed between
This makes it possible to pass downwards.

Reference numeral 7 denotes a shaft cylinder protruding from the front and rear of the axis position of the rotary disk 1, and 8 is a fixing screw screwed into the shaft cylinder 7, which is used to tighten the rotating shaft 19 fitted into the shaft cylinder 7 as described later. Fix it.

Alternatively, keys may be driven into key grooves formed in the shaft tube 7 and the rotating shaft 19 (described later) to fix the two.

An endless belt 15 in a bucket elevator device, which will be described later, is suspended and supported within the width of the left and right vane plate portions 4 of the blade pulley P, and by using it, crushed rice in the bucket elevator device is prevention, prevention of pulverization, prevention of solidification of powder,
Furthermore, the powder particles that tend to remain at the bottom of the hanging can be blown up and collected.

(Modification of vane pulley) In the above case, the vane pulley P was provided with the protruding piece 9 at the outer end of the vane plate portion 4, but in the case of the vane pulley P shown in FIGS. 4 and 5, is the vane plate part 4
It has a structure in which there is no protruding piece 9 at the outer end portion of.

Therefore, unlike the above case, although there is no effect due to the presence of the protrusion 9, the falling powder and granules
is allowed to pass downward from the space 6 formed between the bottom plate portions 5 of the front and rear adjacent vanes 2 and 3, and the powder and granular material X flowing down is received by the vanes 2 and 3. As the pulley P rotates, the granular material X is guided obliquely downward and discharged from the outer end portions 2A and 3A of the vanes 2 and 3.

Therefore, it can contribute to preventing broken rice, pulverization, and solidification of powder in bucket elevators. This provides usefulness that combines the advantages of the cage-type pulley described above.

(Example of bucket elevator device) Next, among the blade pulleys P described above, FIGS.
A vane pulley P with a projected piece 9 shown in the figure
A case will be explained in which this is configured as a bucket elevator system.

First, in FIG. 6 showing the overall structure of the bucket elevator system, H is a conveyor housing, which is composed of an ascending passage 11 and a descending passage 12.

Reference numeral 13 denotes a charging hopper for the granular material X, which is formed at the lower part of the huffing H on the ascending passage 11 side.

Reference numeral 14 denotes a discharge chute, which is formed on the downward passage 12 side of the upper end of the housing H.

B is a bucket conveyor with a large number of buckets 16 attached to an endless belt 15, and 17 is a housing H.
A flat pulley disposed at the upper end of the housing H, which is pivoted on a rotating shaft 18 that is supported by a bearing across the upper end of the housing H, and supports the upper end of the endless belt 15 by hanging from the flat pulley 17. .

Reference numeral 19 denotes a rotating shaft which is supported by a bearing across the lower end of the housing H. The blade pulley P is fixed to the rotating shaft 19, and the lower end of the endless belt 15 is hung around the blade pulley P. It is supported by a rack.

Reference numeral 20 denotes a drive motor for the bucket conveyor B, which is fixedly installed on a motor base 21 at the upper end of the housing H.

22 is a drive pulley fixed to the rotating shaft of the drive motor 20, 23 is a driven pulley fixed to the rotating shaft 18 of the flat pulley 17 on the upper side, and 24 is a belt suspended between the driving pulley 22 and the driven pulley 23. ,
25 is an air pressure generator such as a blower or compressor, 2
Reference numeral 6 denotes an air supply pipe, one end of which is connected to the discharge port 25A of the air pressure generator, the other end facing directly above the vane pulley P, and air is supplied from an appropriate position of the housing H toward the rear of the vane pulley P. The pipes are connected so that it blows out.

In this case, the air pressure generator 25 is directly fixed to the appropriate position of the housing H directly above the vane pulley P shown in FIGS. 7 and 8, and its discharge port 25A directs air to the rear of the vane pulley P in the same manner as described above. You can also do it like this.

(Function) Then, if the bucket conveyor B is operated by the drive motor 20 and the gate of the input hopper 13 is opened to pour the powder and granular material X into the housing H, the powder and granular material Most of them are Bucket 1
6, they are scooped up one after another and ascend in the ascending passage 11, and are discharged to the outside from the discharge chute 14 to the next process.

At this time, the granular material X scooped into the bucket 16
When the powder is emptied toward the discharge chute 14, that is, when the receiving port of the bucket 16 changes direction from upward to downward and is discharged, a part of the powder and granular material X is transferred to the bucket conveyor B and the elevator housing H. It spills from the gap C of about 10 to 20 mm formed between the two, flows downward along the back surface of the endless belt 15, and falls between the blade pulley P on the lower side and the back surface of the endless belt 15. In addition, among the powder and granular materials Then, it also falls between the blade pulley P on the lower side and the back surface of the endless belt 15.

However, some of the granular material X that has passed through the flow path is located on the left and right sides of the blade pulley P, which has a substantially L-shaped cross section.
3, and a part of it passes through the space 6 of the blade pulley P and is attached to the endless belt 15.
However, as the vane pulley P rotates, it is guided by the vanes 2 and 3 and moves from its left and right outer end portions 2B and 3B toward the inner wall surface of the conveyor housing H in that part. Once discharged, it drops to the bottom of the housing H.

At this time, since the blade pulley P with the projecting piece 9 projecting out is fixed to the rotating shaft 19 extending over the lower end of the housing H, when the rotation speed of the blade pulley P is relatively high, the blade Protrusions 9 protruding from the left and right outer ends of the pulley P generate an appropriate rotational wind force, exerting a blow-up action on the powder and granules X that is about to flow downward, and remains at the bottom of the housing. This contributes to the recovery of powder and granular materials.

Furthermore, when the rotational speed of the vane pulley P is low, if the air pressure generator 25 is operated in tandem with the rotation of the bucket conveyor B, the pressurized air Y flows from the end of the air supply pipe 26 to the vane pulley. An air flow towards the rear of P is formed.

This functions to compensate for the insufficient ejection force due to only the vane pulley P, and the housing H
The air flow that blows up the granular material X that has fallen to the bottom of the housing H is reinforced, so that the granular material By blowing up, it is scooped into the bucket 16 and the powder and granules
This means that it can be recovered without leaving any residue behind.

(Other embodiments of the bucket elevator device) In the case of FIG. 6, the air pressure generator 25 and the air supply pipe 26 are used, and in the cases of FIGS. 7 and 8, only the air pressure generator 25 is used. However, the powder and granular material
It is also possible to use a blow-up recovery device.

In the figure, reference numeral 27 denotes a rotating shaft that is supported by bearings across the left and right walls of the lower part of the conveyor housing H, and 28 is a pair of left and right impellers that are fitted and fixed to the rotating shaft 27. It is arranged between the wall surface and the left and right sides of the endless belt 15. 29 is an arc-shaped cover that covers the upper half of the impeller 28, 30 is a driven pulley fitted and fixed to the outer protruding shaft of the rotating shaft 27, and 31 is installed and fixed at the lower end position of the central space of the conveyor housing H. A drive motor; 32 is a drive pulley fitted and fixed to the rotating shaft of the drive motor 31; 33 is a drive pulley 32;
This is a belt suspended and supported between the driven pulley 30 and the driven pulley 30.

By activating the mechanical blow-up collection device for such falling powder and granules, it is possible to proactively blow up and collect the powder and granules X that tend to remain at the bottom of the housing H, thereby achieving a first-in, first-out effect on the powder and granules. is carried out smoothly.

(Effects of the Invention) As described above, the present invention forms a powder discharge chute and an input hopper at both the upper and lower ends of the conveyor housing, and forms an ascending passage and a descending passage therein. In a bucket elevator system in which a conveyor pulley is rotatably supported at a position, and a bucket conveyor having a plurality of buckets attached to an endless belt is suspended and supported on the upper and lower conveyor pulleys, first, a first In this case, a vane pulley is inserted and supported through the rotating shaft that spans the lower end of the conveyor housing, and the configuration of the vane pulley is adjusted so that the inner base end of the vane plate is placed on the circumference of the outer periphery on both sides of the rotary disk. The blades are fixed at intervals of , and the outer ends of the blades are protruded diagonally rearward, and the blades are divided into a blade part facing the normal direction of the rotary disk and a bottom plate part facing the tangential direction of the rotary disk. It is formed into an L-shaped cross section, and the upper edge of the blade part has an arcuate shape in which the outermost diameter of the outer end part is smaller than the outermost diameter of the inner base end side of the blade part. The vane plate is curved, and a protruding piece is formed on the outer end of the vane plate so as to protrude laterally, and a space is provided between the bottom plate parts of the front and rear adjacent vane plates. We have provided a bucket elevator device that is equipped with an air blowing device on the top that blows up the powder and granules that flow down to the bottom of the conveyor housing. It can contribute to prevention of solidification, etc., and
The wing pulley described in Publication No. 5908 and Utility Model No. 1977-
This provides usefulness that combines the advantages of the cage pulley described in Publication No. 22373.

In particular, the projecting pieces protruding from the left and right outer end portions of the vane plate portion generate a rotating wind force as the vane pulley rotates, which functions usefully for discharging falling powder and granular material and blowing it up.

Second, a vane pulley is inserted and supported on the rotating shaft extending over the lower end of the conveyor housing, and the configuration of the vane pulley is arranged on the inner base of the vane plate on the circumference of the outer periphery on both sides of the rotary disk. The ends are fixed at appropriate intervals, the outer ends of the blades are protruded diagonally rearward, and the blades are connected to the blades facing in the normal direction of the rotating disk and in the direction of contact between the rotating disks. It is formed into an L-shaped cross section with the bottom plate facing toward the bottom plate, and the outermost diameter of the outer end portion of the upper edge of the wing plate is smaller than the outermost diameter of the inner proximal end of the wing plate. It is curved into an arcuate shape, with a space provided between the bottom plate parts of the front and rear adjacent blade plates, and the rotating shaft is supported directly above the rotating shaft of the blade pulley at the lower part of the conveyor housing. A pair of left and right impellers are fitted and fixed on the rotating shaft, and by rotating the impellers and the blade pulley, the powder and granules falling to the bottom of the conveyor housing are lifted up and collected. The company also provided a bucket elevator system.

Therefore, it is useful for preventing broken rice, crushing, and solidifying powder in bucket elevators, and since the left and right impellers rotate in conjunction with the blade pulley, relatively low rotation speed is possible. This functions to compensate for the insufficient evacuation force provided by the vane pulley and to enhance the wind force generated by its rotation, and at the same time, an air flow is actively created to blow up the powder and granules that have fallen to the bottom of the housing.

Therefore, the powder and granules that have fallen to the bottom of the housing without being scooped up by the bucket conveyor can be thrown up and scooped into the bucket, and can be recovered without leaving any powder or granules at the bottom.

Therefore, the residue that cannot be scooped up into the bucket is postponed without remaining until the end, and the first-in, first-out effect is also excellent in the sense that the powder and granules that were put in first are taken out first.

[Brief explanation of drawings]

1 to 3 are views showing an embodiment of the vane pulley, in which FIG. 1 is a perspective view, FIG. 2 is a front view, and FIG. 3 is a side view. 4 and 5 are a perspective view and a front view showing a modified example of the vane pulley.
Fig. 6 is a schematic side view showing the bucket elevator system, Figs. 7 and 8 are enlarged side views and front views of main parts showing the case where the vane pulley is configured on the lower side of the bucket conveyor, and Fig. 9. FIG. 10 is a side view and a front view showing a blow-up collection device for powder and granular material formed at the lower part of the bucket elevator device. Code list, P...Blade pulley, H...Housing, B...Bucket conveyor, X...Powder, Y
... Air, 1 ... Rotating disk, 2, 3 ... Vane plate, 2
A, 3A... Inner base end, 2B, 3B... Outer end, 4... Feather plate part, 4A... Upper edge, 5...
Bottom plate part, 6...Space part, 7...Shaft cylinder, 8...Fixing screw, 9...Protrusion piece, 11...Rising passage, 12...
Descending passage, 13... Input hopper, 14... Discharge chute, 15... Endless belt, 16... Bucket, 17... Flat pulley, 18, 19, 27... Rotating shaft, 20, 31... Drive motor, 21... Motor base, 22, 32... Drive pulley, 23, 30
... Driven pulley, 24, 33 ... Belt, 25 ...
... Air pressure generator, 26 ... Air supply pipe, 28 ... Impeller, 29 ... Cover.

Claims (1)

[Claims] 1. A discharge chute 14 and an input hopper 13 for the powder and granular material Conveyor pulleys 17, P are rotatably supported at upper and lower positions, and a bucket conveyor B, in which a large number of bucket belts 16 are attached to an endless belt 15, is suspended and supported on the upper and lower conveyor pulleys 17, P. In a bucket elevator device, a blade pulley P is inserted and supported on a rotary shaft 19 extending across the lower end of a conveyor housing H, and the configuration of the blade pulley P is arranged such that blades are formed on the circumference of both outer peripheries of a rotary disk 1. Inner base end portion 2A of plates 2 and 3,
3A are fixed at appropriate intervals, and the outer end portions 2B, 3B of the wing plates 2, 3 are provided to protrude diagonally rearward,
The vane plates 2 and 3 are formed into an L-shaped cross section with a vane plate portion 4 extending in the normal direction of the rotary disk 1 and a bottom plate portion 5 extending in the tangential direction of the rotary disk 1.
The upper edge 4A of the inner base end 2A, 3 of the blade plate 2, 3
Compared to the outermost diameter of the A side, the outer end portions 2B, 3
B is bent into an arcuate shape with a smaller outermost diameter, and a protruding piece 9 is formed at the outer end of the vane plate part 4 so as to protrude laterally, and between the bottom plate parts 5 of the front and rear adjacent vane plates 2 and 3. A bucket having a configuration in which a space 6 is provided in the bucket, and an air blowing device is provided directly above the blade pulley P to blow up the powder and granular material X flowing down to the bottom of the conveyor housing H. elevator equipment. 2. A discharge chute 14 and an input hopper 13 for the powder and granular material , P rotatably supported, upper and lower conveyor pulleys 17, and a bucketed conveyor B having a plurality of bucketed conveyors 16 attached to an endless belt 15 are suspended from the upper and lower conveyor pulleys 17. A blade pulley P is inserted into and supported by a rotary shaft 19 extending across the lower end of the housing H.
The configuration of the blade pulley P is arranged such that the inner base end portions 2A, 3A of the vane plates 2, 3 are arranged on the circumference of the outer periphery on both sides of the rotary disk 1.
are fixed at appropriate intervals, and the outer end portions 2B, 3B of the vanes 2, 3 are provided to protrude diagonally rearward, so that the vanes 2, 3 are arranged in a vane section facing in the normal direction of the rotary disk 1. 4 and a bottom plate portion 5 extending in the tangential direction of the rotary disk 1 to form an L-shaped cross section. It is curved into an arcuate shape with the outermost diameter of the outer end portions 2B, 3B smaller than the outermost diameter of the blade, and a space 6 is provided between the bottom plate portions 5 of the front and rear adjacent wing plates 2, 3. In addition, a rotating shaft 27 is supported directly above the rotating shaft 19 of the vane pulley P at a lower position of the conveyor housing H, and a pair of left and right impellers 28 are fitted and fixed to the rotating shaft 27. A bucket elevator device characterized in that the powder and granular material X flowing down to the bottom of the conveyor housing H is lifted up and collected by rotating the impeller 28 and the vane pulley P. 3. The bucket elevator apparatus according to claim 2, wherein a projecting piece 9 is formed on the outer end of the vane plate portion 4 of the vane pulley P so as to project laterally.