JPS6111845B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a screw conveyor for transporting waste materials from coal stores, ship holds, etc., and more particularly to a screw conveyor equipped with a material excavation and scraping device.

Conventionally, a screw conveyor consisting of a conduit and a screw inserted axially inside the conduit is used for coal storage,
It is used to carry out materials to be removed from ship holds, etc. The waste is guided into the conduit through an opening formed at the bottom of the conduit, and transported upward by a rotating screw.

The screw conveyor having such a configuration has the following problems.

○B If the material to be handled is limestone or potassium chloride, etc., which harden easily when exposed to moisture, the slope of the material will not collapse even if the angle of repose exceeds the angle of repose and the material will not be taken into the pipe. This resulted in a significant drop in processing efficiency.

○B This is true of any material to be handled, but especially in the case of light and small materials such as grains, they are blown to the outer periphery by the rotation of the screw, and cannot be transported upwards by the screw. Nakatsuta.

○C When cargo handling materials are fully loaded in a cargo hold, etc., they are surrounded by surrounding materials, so they are not thrown away by the screws, and the weight of the surrounding materials prevents the materials from getting inside the conduit. The material is pushed and transported upwards, but when there is not enough material left at the bottom of the stowage, the material no longer enters the inside of the conduit, or the material does not fill up to the top of the opening, causing the material to leak through the gap. It had spilled and could no longer be transported. Therefore, a large amount of material remains at the bottom of the stowage, and a great deal of time and effort is expended in transporting it.

The present invention will be described in detail below based on embodiments shown in the drawings.

In the figure, 1 is a conduit, 2 is a screw rotatably inserted into the conduit, and the lower end of the shaft 3 is supported by a bearing 5 fixed to the lower end opening of the conduit 1 via an arm 4. 6 is screw shaft 3
The tip of the blade, which extends horizontally, reaches directly below the material confinement space 9e, which will be described later. Reference numeral 7 denotes a lower material intake port opened between the arms 4; 8 an upper material intake port opened in the peripheral wall of the lower end of the conduit 1; 9 an excavation and scraping device rotatably supported on the conduit 1; The screw 2 is rotated in a direction opposite to that of the screw 2 via a driving electric motor 10 and transmission mechanisms 11, 12, and 13 mounted on the screw 2.

The excavating and scraping device 9 includes a side wall forming frame 9a, excavating and scraping blades 9b, and a receiving plate 9c.

A plurality of side wall forming frames 9a are arranged so as to surround the conduit 1 at a predetermined distance from each other and also away from the outer peripheral surface of the conduit 1. The space between the outer peripheral surface of the conduit 1 and the side wall forming frame 9a is configured as a material confinement space 9e.

The excavating and scraping blades 9b are continuous to the front side of the side wall forming frame 9a in the rotational direction. The excavating and scraping blades 9b cover the opening that is the gap between the side wall forming frame 9a and the outer periphery of the conduit 1, and cover the opening that is the gap between the side wall forming frame 9a and the outer periphery of the conduit 1, and cover the other side wall forming frame 9 located on the front side in the rotational direction.
a Extends to the outer periphery. The excavating and scraping blades 9b and the side wall forming frame 9a are spaced apart from each other by a predetermined distance, and open toward the front in the rotational direction.

The space between the side wall forming frame 9a and the excavating and scraping blades 9b is partitioned by a plurality of receiving plates 9c.
The receiving plates 9c are horizontally installed between the side wall forming frame 9a and the excavating and scraping blades 9b, and a plurality of plates are fixed at appropriate intervals, and a vertically long space is partitioned into a plurality of upper and lower stages.

Next, the unloading operation using the screw conveyor having the above configuration will be described.

While the screw 2 is rotated, the excavating and scraping device 9 is rotated in the opposite direction. Lower the screw conveyor into the material to be handled.

Even if the material being handled is a material that hardens easily due to moisture, such as limestone, the material is broken down by the cutting blade 6 that rotates together with the screw 2 and the excavating and scraping blade 9b that rotates, making it easier to take it into the conduit 1. .

Furthermore, if the screw conveyor is moved in the horizontal direction, the material will be actively taken in by the excavating and scraping blades 9b.

Since the tip of the cutting blade 6 reaches just below the material confined space 9e, it also breaks the material immediately below the material closed space 9e, making it easier to take it into the space 9e.

Material entering the conduit 1 from the lower material inlet 7 at the lower end of the conduit 1 is conveyed upward by the screw 2.

The material taken in from the opening of the excavating and scraping blade 9b completely fills the material confinement space 9e between the outer peripheral surface of the conduit 1 and the side wall forming frame 9a. Then, from the upper material intake port 8 at the lower end of the conduit 1, the material is transferred to the conduit 1.
Since the material is pushed into the pipe from behind, the material in the material confinement space prevents it from splashing out in the outer circumferential direction due to the screw, allowing for smooth removal. becomes.

When the material at the stowage bottom is running low, the top end of the pile of material may not reach the top end of the opening of the excavating and scraping wing 9b. Therefore, even if the excavating and scraping device 9 is rotated, material cannot be taken in from the upper part of the opening of the excavating and scraping blade 9b. That is, the material located at the upper part of the material confinement space 9e is no longer pushed from behind, and the material collapses toward the opening. However, since the collapsed material is received by each receiving plate 9c,
It does not collapse significantly, still closes the opening, and maintains the material confinement space 9e to be filled with the material. Therefore, even if there is little material left at the bottom of the stowage, it is possible to carry out the goods in a satisfactory manner.

Furthermore, even when the screw conveyor is temporarily stopped and restarted, the excavating and scraping device 9 rotates several times in order to fill the material confinement space 9e with the material by the receiving plate 9c. There is no need to wait for the space 9e to be filled with materials, and the unloading work can be resumed immediately.

Since the present invention has the above configuration, the following effects can be obtained.

○The Iscrew and excavation scraping device are rotated, and the cutting blades and excavation scraping blades break up the material and actively take it in, which reduces processing efficiency even for materials that harden easily, such as limestone. Never.

○B Since the space between the outer periphery of the conduit and the side wall forming frame is configured as a material confinement space, the material taken in from the opening of the excavating and scraping blade fills the material confinement space, making it lightweight and Even if the material is small, it can be taken into the conduit by being pushed from behind, making it possible to carry it out easily.

○C The space between the excavation raking blade and the side wall forming frame is divided into upper and lower stages by a receiving plate, so that even if there is little material left at the bottom of the stowage, the material in the space will be supported by the receiving plate. It maintains the material in the material confinement space without collapsing significantly. Therefore, the amount of material left behind can be kept to a small amount without reducing the ability to carry out the material.

Moreover, even when the screw conveyor is restarted, it becomes possible to immediately resume carrying out.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a partially sectional side view taken along the line - in FIG. 4, FIG. 2 is a sectional view taken along the line - in FIG. 1, and FIG. 1, FIG. 4 is a sectional view taken along the line ``-'' in FIG. 1, and FIG. 5 is a sectional view taken along the line ``-'' in FIG. 1. 1... Conduit, 2... Screw, 3... Screw shaft, 4... Arm, 5... Screw bearing, 6... Cutting blade, 7... Lower material intake port, 8... Upper material intake port,
9... Excavation and scraping device, 9a... Side wall forming frame, 9b... Excavation and scraping blade, 9c... Receiving plate, 9e... Material confinement space section,
10...Electric motor, 11, 12, 13... Transmission mechanism.

Claims (1)

[Claims] 1. In a screw conveyor consisting of a conduit and a screw inserted in the internal axial direction, a material intake port is provided at the lower end of the conduit and the peripheral wall of the lower end, and the conduit is surrounded at intervals and surrounding the conduit. A rotatable side wall forming frame is provided, and the side wall forming frame includes:
An opening along the longitudinal direction of the conduit, an excavating and scraping blade that covers the opening and opens toward the front in the rotational direction, and a plurality of receiving plates that partition the inside of the scraping blade into a plurality of upper and lower stages, and the A material excavation and scraping device, characterized in that a material confinement space is formed between the side wall forming frame and the lower end of the conduit, and cutting blades are provided at the bottom of the conveyor, the blade tips of which reach directly below the material confinement space. Screw conveyor with.