JPS6324895B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a granular material lifting device for lifting granular material stored in bulk in a ship's hold or the like.

[Background of the invention]

As this type of device, the one shown in FIG. 1 has been attempted. Inside the hold 10, powder and granular materials 12 are stacked in bulk. The lifting device 14 has a finned belt 22 installed between the upper and lower rotating drums 16 and 18, and drives an electric motor 20 to transport the upper rotating drum 16.
is rotated to rotate the finned belt 22 counterclockwise. The outside of the finned belt 22 is covered by a casing 24, and the casing 24 has an outlet 26 for discharging the granular material 12 at the upper part and an inlet 28 for receiving the granular material 12 at the lower part. In addition, a feeder 2 is provided at the receiving port 28 at the bottom of the casing 24.
The feeder 29 consists of a rotor 30 and a plurality of blades 34 erected around the outer circumference of the rotor 30, and the blades 34 rotate counterclockwise to feed the powder and granules 1.
2 due to its centrifugal force, the finned belt 22
The granular material 12 is supplied to. When the level of the bulk powder layer is lowered, the lifting device 14 is gradually lowered by its own weight and pushed into the powder layer 12. At this time, since the above operation is performed while rotating the rotor 30, the lifting device 14 can be easily lowered.

However, in the above device, the rotor 3
The uptake of the granular material 12 of 0 is carried out on the left side (back section) in FIG. 1, while the discharge of the granular material 12 is carried out on the right side (front section). Therefore, the distance from the intake of the powder and granular material 12 to its discharge in this rotor 30 becomes long, and during this time, the powder and granular material 12 as a sent object exists between the blades 34, and the particulate material 12 as a deposit exists at the outer circumferential position of the blade 34. The disadvantage is that the friction loss with the powder 12 is large and the power consumption of the rotor 30 is large.

[Purpose of the invention]

The purpose of the present invention is to reduce the power consumption of the rotor.
Another object of the present invention is to provide a powder and granule material lifting device that allows easy operation of lowering the device and plunging its tip into a powder and granule layer.

[Summary of the invention]

In order to achieve the above object, a pair of rotating drums are arranged above and below, a belt with fins is installed between the two rotating drums, and a feeder is arranged directly below this belt to supply powder and granular material to the belt. In the powder and granular material lifting device, the feeder includes a rotor, a plurality of blades that are erected on the outer periphery of the rotor and are longer than the width of the rotor in the axial direction of the rotor; and a case that surrounds the blade and has a powder intake port formed in a position in the axial direction of the rotor, and a powder excavation part that is attached to the lower part of the case.

As the excavating part, a fixed member having a pointed head or a screw driving part is preferably used.

[Embodiments of the invention]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the powder transport device according to the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 2 is a front sectional view of the main part of the powder and granular material lifting device according to the present invention. The finned belt 22 and casing 24 shown in FIGS. 2 and 3 have substantially the same configuration as the finned conveyor 22 and casing 24 shown in FIG. 1, so a detailed explanation thereof will be omitted. .

A feeder of the granular material lifting device according to the present invention is arranged below the casing 24, and a rotor 36 of the feeder is attached to a rotor shaft 42. Both ends of the rotor shaft 42 are rotatably supported by a pair of support members 39, 39, and upper ends of the pair of support members 39, 39 are fixed to the side surface of the casing 24, although not shown. Also, a belt 38 is attached to the left end of the rotor shaft 42.
The upper end of the belt 38 is wound around the shaft of a drive motor (not shown). Therefore, the rotor 36 is rotated by a drive motor (not shown) via the rotor shaft 42 and the belt 38.

On the outer periphery of the rotor 36 are rectangular blades 40, 40.
...... are arranged upright, and each blade 40 is formed to be longer than the width of the rotor 36 in the axial direction of the rotor 36. The rotor 36 and the blades 40, 40...... are surrounded by a case 44, the upper end of the case 44 is attached to the lower surface of the casing 24, and the casing 2
The lower surface of 4 is open and communicates with case 44. Further, openings 46, 46 for taking in the circular powder 12 are formed on both sides of the casing 44, and the diameter of the openings 46 is approximately the same as the diameter of the rotor 38. Further, the rotor shaft 42 passes through approximately the center of the side openings 46, 46.

Further, a fixing member 50 having a pointed head 48 is attached to the lower surface of the case 44 so that it can be pushed into the powder 12.

The operation of the apparatus of this embodiment will be explained below.

This device is suspended by a crane (not shown), and by operating the device, the bottom case 4
The portion 4 is gradually pushed into the layer of powder 12. At this time, since the fixing member 50 is attached to the lower outer part of the case 44, the powder 12 directly below the case 44 is scraped away by the pointed head 48 of the fixing member 50. Therefore, the thrusting operation can be performed easily.

After performing this thrusting operation to some extent, case 44
When the side opening 46 of the granular material 12 is inserted to such an extent that it is buried in the layer of the granular material 12, the granular material 12 flows through the lateral opening 46 through the rotor 36 in the case 44 due to natural flow due to gravity.
The length of the blade is 40. Also, the blades 40 are connected to the rotor 36.
Since the width of the granular material 12 is longer than the width of the case 44, the powder 12 can be easily taken into the rotating blade 40 through the side opening 46 of the case 44.

The powder 12 is accelerated by the rotation of the rotor 36, and is ejected upward along the inner surface of the case 44. The speed of the ejected powder 12 is approximately equal to the tip circumferential speed of the blade 40, so by appropriately setting the rotation speed of the rotor 36, the powder 12 is given an appropriate ejection speed, and the fins are formed. It is received by the belt 22 and transported. At this time, the powder 12 naturally falls from the inside to the outside of the blade 40, so that the average position at which the powder 12 is taken in becomes the lower part of the rotor 36. For this reason, the rotor 36
The distance from the intake of the powder 12 to the discharge thereof is approximately one-half that of the apparatus shown in FIG. 1 above. Therefore, during this period, the powder and granular material 1
The friction loss between the two members is reduced by half, and the power consumption of the rotor 36 and, by extension, the power consumption of the entire lifting device can be reduced.

FIG. 4 shows another embodiment of the invention. In this embodiment, the rotor is divided into two parts, and the rotor 36
A: 36B, each rotor has a case 44
It is surrounded by A and 44B. Each case is provided with a fixing member 50A, 50B having a side opening 46A, 46B and a pointed head, respectively.
Rotors 36A, 36B are rotated via a common axis. According to this embodiment, the rotor is divided into two parts: cases 44A, 44B, fixing member 50A,
The width of 50B can be reduced. Therefore, the thrusting operation can be performed easily. Moreover, the fixing member 5
Since the height dimensions of 0A and 50B can be made relatively small, the lifting device can be inserted into the lower part of the 12 layers of powder and granular material.

Still other embodiments of the present invention are shown in FIGS. 5 and 6. A screw feeder 52 is disposed on both sides of a fixed member 50C having a pointed head on the lower outer side of the case 44C, and the powder and granular material 12 located directly below the case 44C can be forcibly removed. Therefore, the thrusting operation becomes easier than in each of the embodiments described above.

〔Effect of the invention〕

As described above, in the powder and granular material lifting device according to the present invention, the outer periphery of the rotor located at the lower position is surrounded by a case, and the case is provided with a side opening and a powder and granular material digging means in the lower part of the case. Because of this, the excavation part functions to facilitate thrusting, and when transporting powder and granules, the powder and granules are smoothly moved through the side opening of the case. Since the power is taken into the engine, power consumption is reduced.

[Brief explanation of drawings]

Fig. 1 is a side sectional view showing a schematic configuration of a conventional powder and granular material lifting device, Fig. 2 is a front sectional view showing an embodiment of the present invention, Fig. 3 is a side view thereof, and Fig. 4 is a main part of the present invention. FIG. 5 is a front sectional view showing another embodiment of the invention, FIG. 5 is a side view showing still another embodiment of the invention, and FIG. 6 is a front sectional view thereof. 16, 18... Rotating drum, 22... Belt with fins, 36, 36A, 36B... Rotor, 40...
...Blade, 44, 44A, 44B, 44C...Case, 46...Side opening, 50, 50A, 50B,
50C...fixing member, 52...screw feeder.

Claims (1)

[Claims] 1. A pair of rotating drums arranged above and below, a belt with fins installed between the two rotating drums, and a supply device arranged directly below the belt with fins to supply powder and granular material to the belt. A powder and granular material lifting device comprising: a rotor; a plurality of blades standing upright on the outer periphery of the rotor and formed longer than the rotor width in the axial direction of the rotor; and the rotor. and a case surrounding the blade and having a powder intake port formed in a position in the rotor axis direction, and a powder excavation part attached to the lower part of the case. Lifting device. 2. The powder/grain material lifting device according to claim 1, wherein the powder/grain material excavation section is a fixed member having a pointed head. 3. The powder/grain material lifting device according to claim 1, wherein the powder/grain material excavation section is equipped with a screw drive section.