JPH0873044A - Hopper equipped with screw conveyor - Google Patents

Abstract

PURPOSE: To provide a hopper equipped with a screw conveyor which can prevent the deflection of the treated substance in a hopper, permits the reduced biting even if stones, etc., are contained in a soft treated substance, and permits the small driving torque. CONSTITUTION: As for a hopper equipped with a screw conveyor which is equipped with a screw conveyor 11 for discharge at the bottom part, the outside diameter of a screw blade 14 on the counter-discharge port side of the screw conveyor 11 is made smaller than that of the screw blade 15 on the discharge port side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hopper with a screw conveyor for temporarily storing marine life including shellfish, sludge and the like, ballast or other powdery and granular materials and gradually cutting out from the lower part.

[0002]

2. Description of the Related Art Since a large amount of seawater is used in nuclear power plants and thermal power plants, shells, algae, etc. (hereinafter simply referred to as marine organisms or treated materials) adhere to the waterways, and are often used for periodic inspections. Although this was removed and the landfill was used for disposal in the past, incineration is being considered because the landfill is a problem. In this case, since it is difficult to incinerate a large amount of the collected marine organisms at the same time, it is preferable to put them in a hopper with a screw conveyor and gradually cut out and incinerate. 3 and 4 show general hoppers 50 and 51 with a screw conveyor according to a conventional example. Screw hoppers 54 and 55 having a power source (not shown) are provided below the hoppers 52 and 53, respectively. In the hopper 51 with a screw conveyor shown in FIG. 4, the pitch (P ′) of the screw blades on the side opposite to the discharge port
Is narrower than the pitch (P) of the screw blades on the discharge port side.

[0003]

However, in the hopper 50 with a screw conveyor shown in FIG. 3, the discharged products are mainly discharged from the rear part (that is, the side opposite to the discharge port), so that the processed products in the hopper 52 are discharged from the front part. There is a drawback in that the portion (that is, the discharge port side) becomes high and the rear portion becomes low, and the deposition state of the processed material becomes uneven. In the hopper 51 with a screw conveyor shown in FIG. 4, since the pitch (P ') of the screw blades 56 on the side opposite to the discharge port is smaller than the pitch (P) of the screw blades 57 on the discharge port side, the above-mentioned drawbacks are solved. However, similar to the hopper 50 with a screw conveyor, in the hopper 51 with a screw conveyor, the diameter D of the screw blades 56, 57 is
Has a disadvantage that the driving torque is large. In addition, in the hoppers 50 and 51 with a screw conveyor shown in FIGS.
Since there is a small gap between 6, 57 and the lower casing 58 that constitutes the bottom plate, there is also a drawback that if a hard material such as stone is mixed in the cut-out processed material, biting easily occurs. In addition, in JP-A-4-298410, there is proposed a screw feeder in which a pair of tapered screws are arranged in parallel in anti-parallel, but when the screw on the side opposite to the discharge port has a large diameter, the lower casing There is a case that stones and the like are bitten in as a result of a small gap between and, and further, since the screw conveyor of the large diameter portion has a larger carrying amount, there is a drawback that the state of accumulation of the processed material in the hopper is not uniform. The present invention has been made in view of such circumstances, it is possible to reduce the bias of the processed material in the hopper, biting is small even if stones or the like is contained in the soft processed material, further driving torque is small screw conveyor The purpose is to provide an attached hopper.

[0004]

A method according to the above-mentioned object.
The hopper with a screw conveyor described is a hopper with a screw conveyor provided with a screw conveyor for discharging at the bottom, the outer diameter of the screw blade on the side opposite to the discharge port of the screw conveyor, from the outer diameter of the screw blade on the discharge side. It is made smaller. A hopper with a screw conveyor according to a second aspect is the hopper with a screw conveyor according to the first aspect, wherein the screw conveyors are provided in parallel in a plurality of rows on the bottom of the hopper. In the above description, the discharge port side means the side where the discharge port, which is a drop port for the processed material, is provided on the screw conveyor, and the non-discharge port side means the side opposite thereto.

[0005]

In the hopper with a screw conveyor according to claims 1 and 2, since the outer diameter of the screw blade on the side opposite to the discharge port of the screw conveyor is smaller than the outer diameter of the screw blade on the side of the discharge port, Not only the processed product is scraped out of, but also the processed product is discharged from the discharge port side. Also,
The small outer diameter portion of the screw blade on the side opposite to the discharge port has a large gap with the lower casing of the screw conveyor, so that the inclusion of stones and the like contained in the processed material is reduced. Further, since the diameter of the screw blade on the side opposite to the discharge port is reduced, the friction torque between the object to be processed and the blade is reduced accordingly, and the drive torque is reduced.

[0006]

Embodiments of the present invention will now be described with reference to the accompanying drawings to provide an understanding of the present invention. 1 is a side sectional view showing a schematic configuration of a hopper with a screw conveyor according to an embodiment of the present invention, and FIG. 2 is a plan view of the same.

As shown in FIGS. 1 and 2, screw conveyors 11 and 12 are provided in parallel at the bottom of the hopper 10. The screw conveyors 11 and 12 have screw shafts 16 and 17 to which screw blades 14 and 15 having different outer diameters are fixed, and screw shafts 16 and 1, respectively.
Bearings 18 to 21 for rotatably supporting both sides of 7, and power transmission means 22 equipped with gears or sprockets attached to one end of the screw shafts 16 and 17 for rotating them in opposite directions, and the power transmission means 22. It has the deceleration motor 23 connected.

The outer diameter of the screw blade 14 mounted on the side opposite to the discharge ports of the screw shafts 16 and 17 is 1 / out of the outer diameter of the screw blade 15 mounted on the side of the discharge port.
The length of the portion where the screw blade 15 having a large outer diameter is about 5 to 4/5 (preferably 1/3 to 2/3) is 1 of the length of the effective screw blade.
It is about / 2 to 1/5. This ensures a sufficient gap between the small-diameter screw blade 14 and the lower casing 24 that constitutes the bottom plate, and has a structure in which stones and the like are unlikely to be caught inside.

Therefore, in the hopper with a screw conveyor, when the deceleration motor 23 is driven, the processed products such as sea life accumulated in the hopper 10 move toward the discharge port 25 by the rotation of the screw blades 14 and 15. To do. In this case, since the outer diameter of the screw blade 14 is smaller than the outer diameter of the screw blade 15, the carry amount (A) is small, and since the screw blade 15 has a large outer diameter, the carry amount (B) is large. The conveyance amount of the portion newly added from the upper part of the screw blade 15 is (BA), and the scraped-out processed matter enters the screw conveyor not only from the side opposite to the discharge port but also from the discharge port side. The processed material can be scraped out not only from the rear side but also from the front side, and thus the processed material can be scraped out more uniformly.

Further, since the screw blades 14 have a sufficient gap between them and the lower casing 24, there is an advantage that even if a hard object such as stone or iron piece is contained in the object to be processed, it is difficult to bite it. Since the outer diameter of the screw blade 14 is small, the driving torque is small and less power is required than the conventional screw conveyor as a whole.

In the above embodiment, the outer diameter of the screw blade is 2
Although the case of changing the number of steps has been described, it is also possible to change the number of steps further. Further, in the above-mentioned embodiment, the case where two screw conveyors are arranged side by side has been described, but it is also possible to use one screw or three or more. In this case, it is preferable to alternately rotate the screw shafts. As a result, the processed material in the hopper can be scraped out more evenly.

[0012]

As is apparent from the above description, the hopper with a screw conveyor according to claims 1 and 2 not only scrapes the processed product from the side opposite to the discharge port of the hopper, but also discharges the processed product from the side of the discharge port. Since it is scraped out, the processed material can be discharged more evenly. In addition, since the screw blade has a small diameter, the driving torque is correspondingly reduced, and further, even if stones or the like are mixed in the processed material, there is an advantage that biting does not easily occur. Further, since it can be performed only by changing the outer diameter of the screw blade, the manufacturing cost is low and there is an advantage that the existing screw conveyor having a single blade diameter can be easily modified.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a schematic configuration of a hopper with a screw conveyor according to an embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a sectional view of a hopper with a screw conveyor according to a conventional example.

FIG. 4 is a sectional view of a hopper with a screw conveyor according to a conventional example.

[Explanation of symbols]

 10 Hopper 11 Screw Conveyor 12 Screw Conveyor 14 Screw Blade 15 Screw Blade 16 Screw Shaft 17 Screw Shaft 18 Bearing 19 Bearing 20 Bearing 21 Bearing 22 Power Transmission Means 23 Reduction Motor 24 Lower Casing 25 Discharge Port

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshihiro Ono 46-59, Nakahara, Tobata-ku, Kitakyushu, Fukuoka Prefecture Machinery & Plant Division, Nippon Steel Corporation (72) Inventor Takashi Ando Kaminomachi, Takamatsu City, Kagawa Prefecture 3 1-4, Shiden Engineering Co., Ltd. Machinery Department (72) Inventor Yukishige Asada 3 1-4, Kaminomachi, Takamatsu City, Kagawa Prefecture 4 Denshi Engineering Co., Ltd. Machinery Department (72) Inventor Masahiro Nitta Kagawa Machinery Department, Shinden Engineering Co., Ltd.

Claims (2)

[Claims] 1. A hopper with a screw conveyor having a discharge screw conveyor at the bottom, wherein the outer diameter of the screw blade on the side opposite to the discharge port of the screw conveyor is smaller than the outer diameter of the screw blade on the side of the discharge port. Hopper with screw conveyor. 2. The hopper with a screw conveyor according to claim 1, wherein a plurality of rows of the screw conveyor are provided in parallel at the bottom of the hopper.