JPS5823307B2 - Discharge device for bulk items, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a storage and discharge device using a conveyor screw used for transporting and discharging bulk materials, waste, and the like.

Conventionally, in this type of conveyor screw storage and discharge device,
A plurality of screws for transporting and dispersing loose materials are arranged in parallel above the conveyor screw for discharging inside the storage tank, so that the loose materials can be taken out of the tank by a conveyor installed under the discharge port. However, during operation, all of the waste in the storage tank moves to the discharge port, and although some of the waste is discharged from the discharge port, most of it hits the wall on the discharge side and is compressed and solidified. There was a risk that waste could get caught between the parts and damage various parts, causing problems with operation.

In order to eliminate this drawback, it has been proposed to provide a return conveyor screw above the discharge conveyor screw for transporting bulk materials in the opposite direction.

However, in conventional devices of this kind, the outer diameter of the return conveyor screw is almost in contact with the outer diameter of the discharge conveyor screw. Since both screws are pushed in opposite directions, there is a risk that both screws will experience increased resistance to conveyance, leading to overload and damage.

In addition, although the return conveyor screw does not have a trough around it and has poor conveyance efficiency, the outer diameter of the conventional return conveyor screw is smaller than the outer diameter of the discharge conveyor screw. It was not possible to secure a sufficient amount of return conveyance.

An object of the present invention is to provide a highly reliable conveyor screw storage and discharge device that can provide a sufficient amount of return conveyance to prevent bulk materials from being compressed and piled up near the discharge port, and can operate smoothly. This is the purpose.

The present invention includes a plurality of discharging conveyor screws provided in parallel to each other at the bottom of a storage tank for bulk materials; In an apparatus having return conveyor screws arranged in parallel, the number of the return conveyor screws is smaller than the number of discharge conveyor screws driven simultaneously, and the outer diameter D2 of the return conveyor screw is set to be smaller than the number of discharge conveyor screws that are driven simultaneously. the outer diameter D1 of the conveyor screw for return, and the outer circumference of the return conveyor screw and the outer circumference of the discharge screw are arranged so that there is a substantial distance H in the height direction. This is a discharge device for things, etc.

To explain the present invention with reference to the drawings in accordance with embodiments, in FIGS. 1 to 3, a storage tank 2 for storing and discharging bulk materials such as waste has walls 6, 7, an input side wall 3, and a discharge side wall 4. There is a sealed conveyor 1 at the top of the input side wall 3.
Two parallel transport and dispersion screws 5 are supported at an intermediate height and driven by a drive device 13.

This screw 5 has inclined blades 17 having a normal lead angle around an axis 16 and parallel blades 18 approximately parallel to the axis 16.
are arranged consecutively and alternately.

A plurality of troughs 20 are arranged in parallel at intervals on the floor 19 of the storage tank 2, and four parallel conveyor screws 8 for discharging are supported on the two troughs 20. It is driven by

The distal end of the conveyor screw 8 extends beyond the discharge side wall 4 and above the conveyor screw 10 below the discharge opening.

The conveyor screw 8 also has an inclined vane 22 having a normal lead angle around the shaft 21, while the upper distal end of the conveyor screw 10 is provided with a parallel vane 11 substantially parallel to the shaft 21.

Returning conveyor screws 23 are disposed above the discharging conveyor screw 8 at a substantial distance H and parallel to each other and parallel to the discharging conveyor screw 8, and the conveyor screws 23 are axially 24 and an inclined blade 25, and is driven by a drive device 26.

The direction of this drive is such that the waste is transported by the conveyor screw 23 towards the input side wall 3, ie in such a way that it is driven back in the opposite direction to the action of the discharge conveyor screw 8.

Further, disc-shaped restraining plates 27, 28, 29, which are slightly larger than the outer diameter of the screw blades, are provided at the end of each screw.

In the figure, 9 is the end wall of the discharge section, 12 is the conveyor screw 1
A discharge port cover for the handled items carried by the machine is provided so that it can be opened and closed freely.

33 is a single drive device that drives the conveyor screw 10 once.

The shape of the return conveyor screw 23 in the illustrated embodiment can be determined in various ways, such as the screw outer shape and pitch, so that it can return the same amount as the discharge amount of the discharge conveyor screw 8 that is driven at the same time.
In order to maximize the effect of item 3 and to simplify the mechanism, ease of maintenance, and economic efficiency, the number of return conveyor screws 23 is smaller than the number of 80 discharge conveyor screws that are simultaneously driven. It is better to do so.

In practice, the discharge conveyor screws 8 are driven at the same time.
The number of returning conveyor screws 23 is preferably N-1.

That is, if N-1 is used, one return conveyor screw 23 can be arranged above the middle of adjacent discharge conveyor screws 8, and the return action can be made uniform.

Further, as shown in FIG. 3, one return conveyor screw 23 may be arranged above the middle of the two sets of discharge conveyor screws 8.

In addition, the outer diameter D2 of the return conveyor screw 23 is designed to move loose objects near the return conveyor screw 23 along with it, and to reduce the load of accumulated loose objects on the discharge conveyor screw 8. For both reasons of smooth discharge, it is desirable that the outer diameter D2 of the return conveyor screw 23 is larger than the outer diameter D1 of the discharge conveyor screw 8.

- In other words, since there is no trough around the return conveyor screw 23, the conveyance efficiency is extremely poor, and the number of return conveyor screws is also smaller than that of the discharge conveyor screw, so the amount of return conveyance is likely to decrease, but D2>Dl. This ensures a sufficient amount of return conveyance and prevents loose materials from accumulating on the discharge port side.

Furthermore, the position of the return conveyor screw 23 in the cross-sectional direction is determined at the same time as the outermost discharge conveyor screw 8 which is driven in order to move the bulk material in the vicinity of the return conveyor screw 23; Conveyor screw 2 for returning inside from the center of conveyor screw 8
It is effective that the return conveyor screws 23 are located at symmetrical positions with reference to the two centers of the two outermost discharge conveyor screws 8.

Note that by providing a substantial distance H between the outer diameter D2 of the return conveyor screw 23 and the outer diameter D□ of the discharge conveyor screw 8, the discharge conveyor screw 8 allows the conveyor to be conveyed along its periphery. The loose things that will be done,
The loose items conveyed around the return conveyor screw 23 are less likely to interfere with each other.
Overload and damage due to interference or pinching can be prevented.

However, if this interval H is too large, the effect of the return conveyor screw 23 will be halved, and the operating situation will be the same as with the conventional discharge conveyor screw alone, causing operational problems such as increased power and damage to equipment, so this is desirable. It is important that the distance H is within a range of % or less of the outer diameter D10 of the discharge conveyor screw 8.

Further, the screw pitch P1 of the conveyor screws, that is, the return conveyor screw 23 and the discharge conveyor screw 8. P2 is a screw whose pitch gradually becomes dog-like toward the feeding direction in order to prevent drifting of loose materials and compression and solidification of loose materials at the upper part of the discharge port.

□In this case, the screw pitch P is 0 of the screw outer diameter.
．． If the screw pitch is smaller than 5 times, adhesive loose materials will easily solidify between the screw pitches and between the pipes, and if the screw pitch is larger than 1.2 times the screw outer diameter, the discharge amount will fluctuate. , the pitch range is 0.5 to 1.2 times the outer diameter of the screw, more preferably 0.6 to 1.2 times the outer diameter of the screw.
Vary within a range of 1.0 times.

In addition, the screw 5 and the return conveyor screw 23
, discharging conveyor screws 8, at least one or both of which are protrudingly provided with loose object prevention members 30, 31, 32 such as circular I plates or hemispherical shapes on the upper part of the inner wall surface of the storage tank corresponding to the ends of the screw blades; This is a structure that can appropriately prevent loose objects from getting caught up or intruding between the screw blade end and the wall surface.

That is, the loose materials are pressed against the screw 5, the return conveyor screw 23, the discharge conveyor screw 8, and the surrounding walls 3, 4, and the screw blade ends and the walls 3,
This prevents fibers or string-like objects from falling onto the screw shaft located between the winding devices or from being piled up or loose, which would be extremely inconvenient in terms of maintenance of the winding device.

In this case, the members 30, 31, and 32 for removing loose objects are conical members made of conical plates, but the angle of inclination is set to be greater than the angle of repose, which is effective to prevent loose objects from accumulating, and curved plates may also be used. A cover or a sloped plate of a shape and size that protects from loose objects is selected and used.

In the specific example shown in FIG. 3, instead of the example shown in FIG. 2 in which four discharge conveyor screws 8 are driven simultaneously, two discharge conveyor screws 8 are driven simultaneously, and multiple sets are installed in parallel as one-to-one pairs. be.

Thus, the waste thrown into the storage tank 2 by the conveyor 1 is dispersed left and right by the screw 5, falls on the floor 19, is transferred by the discharge conveyor screw 8, and is discharged to the conveyor screw 10.

When the amount supplied by the conveyor 1 increases, some waste accumulates in the storage tank 2, and the waste is piled up on the discharge side wall 4 by the conveyor screw 8, but is returned to the opposite direction by the action of the return conveyor screw 23. You can prevent it from piling up.

If the capacity of the conveyor screw 23 is determined appropriately relative to the capacity of the conveyor screw 8, waste will not be unevenly distributed.
Furthermore, the discharge capacity is ensured and stable operation can be performed.

Further, restraining plates 27 and 2B are provided at the end of each screw.

29 and loose deflecting members 30, 31 and 32 as necessary, the waste transferred near the end will not be pressed against the wall and there is no risk of it getting caught in the screw shaft penetration part ( Smooth and stable operation can be achieved.

According to the present invention, the mutual interference of loose items conveyed by both the return conveyor screw and the discharge conveyor screw is reduced, overload and damage are prevented, and there is no trough near the return conveyor screw, which improves conveyance efficiency. It is possible to ensure a sufficient amount of return despite the bad conditions, and prevent loose objects in the storage tank from being pushed toward the discharge port, causing problems such as damage to various parts and operation stoppages, and stable and smooth movement. It is possible to create a reliable conveyor screw storage and discharge device that can perform the following tasks.Moreover, it can reduce power consumption and properly prevent equipment damage, simplify the mechanism and maintenance, and greatly improve the discharge function. It is possible to achieve the effect of ensuring economical and safe driving.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view showing an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line I--I in FIG. 1, and FIG. 3 is a cross-sectional view of another embodiment. 1...Conveyor, 2...Storage tank, 3.
...Input side wall, 4...--Discharge side wall, 5...
...Screw, 6,7...Side plate, 8...
... Compare screw, 9- ... End wall, 1
0...Compare screw, 11...-
Parallel blades, 12... Lid, 13, 14...
- Drive device, 15... Lower end, 16...
・Axis, 17... - Inclined blade, 18... Parallel blade, 19... Floor, 20... Trough, 21... - Axis , 22... inclined blade,
23・・・Compare screw, 24・−・−・
Shaft, 25... Inclined blade, 26... Drive device, 27, 28, 29... Suppression plate, 30, 3
1, 32... Member to prevent loose items, 33...
- Drive device.

Claims (1)

[Scope of Claims] 1. A plurality of discharging conveyor screws provided in parallel to each other at the bottom of a storage tank for bulk materials; In a device having return conveyor screws arranged in parallel, the number of the return conveyor screws is smaller than the number of discharge conveyor screws that are simultaneously driven, and the outer diameter of the return conveyor screws is D2 is the discharge conveyor screw. A loose item, etc., characterized in that the outer diameter D□ is smaller than the outer diameter D□, and the outer periphery of the return conveyor screw and the outer periphery of the discharge screw are arranged so that there is a substantial distance H in the height direction. ejection device.