JPS6324894B2 - - 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 rotating drums 16 and 18 arranged above and below, and drives an electric motor 20 to move the upper and lower rotating drums 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
granular material 12 is supplied. 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). For this reason, the distance from the intake of the powder and granular material 12 in this rotor 30 to its discharge becomes longer, and during this period, the powder and granular material 12 as a sent object exists between the blades 34 and the outer circumferential position of the blade 34 as a deposit. 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, the present invention includes a pair of rotating drums arranged above and below, a finned belt installed between both the rotating drums, and a finned belt arranged directly below the finned belt to transport powder and granular material to the In a powder and granular material lifting device equipped with a feeder for supplying to a belt, the feeder includes a rotor and a plurality of granular materials that are erected around the outer circumference of the rotor and are formed to be longer than the width of the rotor in the axial direction of the rotor. A lower surface has a plurality of slits surrounding the blades, the rotor and the blades, and has a powder intake port formed in a position in the axial direction of the rotor, and a plurality of slits that take the powder into the powder layer when thrust into the powder layer. It is characterized by consisting of a case formed in

[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 36 of the granular material lifting device according to the present invention is arranged below the casing 24 , and a rotor 38 of the feeder 36 is attached to a rotor shaft 42 . Both ends of the rotor shaft 42 are connected to a pair of supporting members 39, 3.
9, and a pair of supporting members 39, 3
Although not shown, the upper end of 9 is fixed to the side surface of the casing 24. A belt 41 is wound around the left end of the rotor shaft 42, and the upper end of the belt 41 is wound around a drive motor shaft (not shown). Therefore, the rotor 38 is rotated by a drive motor (not shown) via the rotor shaft 42 and the belt 41.

On the outer periphery of the rotor 38 are rectangular blades 40, 40.
. Rotor 38 and blades 40, 40
...... is surrounded by the case 44, and the case 44
The upper end is attached to the lower surface of the casing 24, and the lower surface of the casing 24 is opened to communicate with the case 44. Furthermore, circular openings 46, 46 are formed on both sides of the case 44 to take in the powder and granular material 12, and the diameter of the side openings 46 is approximately the same as the diameter of the rotor 38. The rotor shaft 42 passes through approximately the center of the side openings 46, 46.
Further, a plurality of slits (rectangular holes) 50, 50, . . . are formed on the lower surface of the case 44.

Incidentally, as shown in FIG. 3, a part of the back surface of the case 44 is opened and louvers 52, 52, . . . are provided therein.

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, the powder 12 near the lower outer periphery of the case 44 is pushed into the case 44 through the slit 50. The powder 12 that has entered the case 44 reaches between the blades 40 of the rotor 38, is accelerated by its rotation, and is ejected upward along the inner surface of the case 44. Since the speed of the discharged granular material 12 is approximately equal to the peripheral speed of the tip of the blade 40, a sufficient discharge speed can be given to the granular material 12 by appropriately setting the rotation speed of the rotor 3. Released powder 12
is received by the finned belt 22 and transported.
By continuing the above operation, the lifting device can be easily pushed into the 12 layers of powder and granular material.

When the side opening 46 of the case 44 is buried to such an extent that it is buried in a layer of powder and granules, the powder and granules 12 reach between the blades 40 of the rotor 38 in the case 44 through the side opening 46 due to natural flow due to gravity, and as described above. Similarly, it is ejected upward and received by the finned belt 22.
In this case, since the blades 40 are formed to extend longer than the width of the rotor 38, they easily enter the powder and granules, and the powder and granules 12 naturally fall from the center side of the blades 40 toward the outside in the radial direction. , case 4
It flows into 4 without resistance. Further, the average position at which the powder or granular material 12 is taken in is the lower part of the rotor 38. Therefore, the distance from the intake of the powder or granular material 12 in the rotor 38 to its discharge is approximately one-half that of the apparatus shown in FIG. 1 above. Therefore, the friction loss between the particles during this period is halved, and the rotor 38
It is possible to reduce the power consumption of the pump and, by extension, the power consumption of the entire lifting device.

In addition, in order to improve the workability when lifting the powder and granular material 12 in bulk, this lifting device generally requires a swing function that swings the angle back and forth using its upper end as a fulcrum. Adjust the swing angle from -15° to +
In the case of a range of 15 degrees, as shown in FIG. It will be done. When the side opening 46 is filled, the poking is stopped, and the granular material 12 is taken in from the side opening 46 and supplied to the finned belt 22. At this time, the louver 52 is arranged so that the powder and granular material 12 is exposed to the case 44 from the back side of the rotor 38.
This prevents it from flowing into the interior. This louver 5
The height and pitch of 2 are determined by the minimum swing angle and the angle of repose of the powder 12.

On the other hand, when swinging +15°, the powder 12 is pushed into the slit 50 and the louver 5 as shown in Figure 5.
The opening of No. 2 is pushed up into the case 44 and taken into the rotor 38. When the thrusting is stopped in this state, the powder 12 near the opening of the louver 52
Since the angle of repose is below the angle of repose, the powder 12 near the louver 52 will not flow into the case. Therefore, the intake of the powder and granular material 12 from the side opening 46 can be stably maintained. In this way, in any swing state, the plunging can be performed smoothly, and after the plunging amount is sufficient and the plunging is stopped, the powder and granule material can be removed from the back side of the rotor 38. The granular material 12 can be taken in only from the side opening 46 without flowing in.

The embodiment described above has the lever 52, but this louver 52 is not essential, and when the powder 12 is taken into the case 44 from the side opening 46, the rotor 38 is Any material may be used as long as it prevents the powder or granular material 12 from flowing into the case 44 from the back surface, and may be a flat plate, for example. Note that the present device is not limited to the above-mentioned operation, and may be operated so as to simultaneously perform the thrusting and the taking in of the powder or granular material 12 from the side opening 46.

〔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 intake port is formed on the side surface of this case and the plurality of holes are formed on the bottom surface. At the time of plunging, the holes function to facilitate plunging, and
When transporting powder and granules, the powder and granules are taken in through the intake port on the side, so power consumption is low.

[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 longitudinal sectional view showing an embodiment of the present invention, and FIG. Figures 4 and 5 are also views in the - arrow direction of Figure 2,
FIG. 4 is a diagram showing a different operating state from FIG. 3; 16, 18... Rotating drum, 22... Belt with fins, 36... Rotor, 40... Blade, 44...
Case, 46... side opening, 50... slit,
52...Luba.

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 that surrounds the blade and has a powder intake port formed at a position in the rotor axial direction, and a plurality of slits formed on the lower surface to take the powder into the interior when thrust into the powder layer. A powder and granule material lifting device comprising: