JPS586489Y2 - Screen kettle dehydration equipment - Google Patents

Description

[Detailed description of the invention] This invention relates to a dewatering device for screen scum that accumulates on a screen such as a bar screen installed in a waterway, is scraped up by an automatic dust remover, and is transferred for incineration, etc. It is something.

Various miscellaneous things are deposited and removed on the bar screen provided in the waterway.

Generally, the deposits on the screen are mostly made up of fibers, mixed with aggregates such as stones.

These deposits are generally incinerated, but since these deposits are mainly composed of fibers and contain a large amount of water, incineration and transportation become difficult. Dehydrated using a press etc.

However, although such dewatering treatment is easy to apply in large-scale facilities, it is difficult to employ in small-scale facilities due to the high construction cost.

The purpose of this invention is that it can be installed at low cost,
Moreover, the present invention provides a screen waste dehydration process that can achieve excellent dehydration effects and is suitable for small-scale facilities.

The screen dregs dewatering device according to this invention includes a rotatable receiving roller installed horizontally and at right angles to the screen dregs transfer direction, and a loaded roller shaft provided approximately vertically above and parallel to the receiving roller. The roller includes a plurality of adjacent load rollers having the same diameter and are loosely fitted in a center hole having a diameter larger than the shaft diameter.

The natural hanging position of the load roller is therefore a position in contact with the receiving roller or a position slightly above this, such that the screen can be passed over the receiving roller directly or via a transfer member.

In the device embodiment of the invention, the screen scraps are passed over receiving rollers via a belt of a belt conveyor, which belt is inclined upward in the direction of transport of the screen scraps.

In another embodiment of the device of the invention, the screen particles are passed directly over a receiving roller, which is rotated by a drive.

On the other hand, in a preferred embodiment of the device of this invention, skirts are provided on both sides of the screen scum transfer path near the receiving roller.

In another preferred embodiment of the device of this invention, the axis of the load roller is adjustable up and down.

In yet another preferred embodiment of the device of this invention, the shaft of the load roller is urged downward by a spring.

This invention will be explained in detail below based on drawings of embodiments.

Figures 1 and 2 show an embodiment of the device of this invention in which the screen is passed over the receiving roller via the belt of the belt conveyor, and the belt is inclined upward in the direction of conveyance of the screen. 1 is a schematic side view, and FIG. 2 is a sectional view taken along the line II-II in FIG. 1.

Screen dregs accumulated on the bar screen and scraped up by an automatic dust remover are dropped from a chute 1 onto an endless belt 2 of a belt conveyor.

The belt 2 is stretched between a drive pulley 3 and a tail pulley 4.

The belt 2 is inclined upward in the direction in which the screen is transported, and its width direction is horizontal.

A rotatable receiving roller 7 is provided on a frame 6 that is integral with the frame of the belt conveyor, at the lower side of the middle of the screen scum transfer side of the belt 2, in contact with the belt 2 at right angles to the screen scum transfer direction. It is rare.

A load roller shaft 8 is attached to the frame 6 along with the receiving roller 7 vertically above the receiving roller 7 or slightly forward of the vertically above the receiving roller 7 in the direction in which the screen scraps are transferred.

The load roller shaft 8 is fixed to the frame 6, or is attached so as to be vertically adjustable, and/or is urged downward by a spring.

Since the vertical adjustment means and the biasing means are means commonly used in general industrial equipment, they are omitted from the drawings and their description will also be omitted.

The load roller shaft 8 has a center hole 10 larger than the diameter of the shaft 8.
A plurality of load rollers 9 having the same diameter are loosely fitted in contact with each other.

The natural hanging position of the load roller 9 is a position in contact with the belt 2 or a position slightly above this.

The natural hanging position of the load roller 9 is selected depending on the layer thickness of the transfer screen.

The load roller shaft 8 is either fixed, vertically adjustable, or further biased by a spring to maintain the load roller 9 in this position so that its natural hanging position is at the above-mentioned position. be done.

Therefore, when screen scraps are inserted between the receiving roller 7 (belt 2) and the load roller 9, the load roller 9 is rotated because the load roller 9 is loosely fitted to the load roller shaft 8 through its center hole 10. At the same time, it is lifted up a little, and its own weight acts on the screen scum, causing the screen scum to be dehydrated.

The dehydrated water is sent to the rear by the inclination of the belt 2.

The receiving roller 7 rotates because the rotatable and moving belt 2 is brought into pressure contact with the receiving roller 7.

The load roller 9 is loosely fitted onto the shaft 8, and is rotated so that the screen scum is released in the transport direction, so that the shaft 8 of the load roller is positioned slightly before the screen is vertically above the shaft of the receiving roller 7 in the transport direction. It is better to

Skirts 5 may be provided on both sides of the belt 2, particularly in the vicinity of the receiving roller, in order to prevent screen scum from falling.

The skirt 5 may be fixedly provided so that its lower edge is always in sliding contact with the belt 2, or it may be integrated with the belt 2, taking measures against curvature at the drive and tail sections I73 and 4.

Rubber, steel, etc. are suitable for the belt 2.

The screen residue dehydrated by the load roller 9 falls from the belt 2 on the drive pulley 3 side.

When a solid object 11 such as a stone is interposed in the screen scraps and is transferred, the load roller 9 is divided and there is a gap between the center hole 10 and the shaft 8, so that the solid object 11 is caught on top of the solid object 11. Only the loaded roller 9 is lifted upwards, and the solid material 11 is allowed to pass through.

The other load rollers 9 continue to dewater the screen residue in their normal positions.

The size of the center hole 10 of the load roller 9 is set so that when the expected largest solid object 11 is pinched, the load roller 9 can pass through the solid object by reaching its top dead center.

The larger the expected size of the solids 11, the larger the center hole 10 of the load roller 9 must be.

This reduces the weight of each load roller 9, and also increases the escape distance during rotational dehydration, reducing the load on the screen.

In this case, the center hole 10 of the load roller 9 should be made thick enough to allow a normal solid object 11 to pass through, so that if an abnormally large solid object 11 enters, the load roller shaft 8 will resist the spring. It may be lifted so that abnormally large solid objects 11 can pass through.

However, in this case, dehydration will be temporarily interrupted.

However, it is desirable to prevent accidents. Note that if the shaft 8 of the load roller 9 is urged downward by a spring,
Since there may be a question as to whether it is not necessary to provide the load roller 9 with the center hole 10 larger than the shaft diameter, this point will be explained.

If the load roller 9 is not provided with a center hole 10 that is larger than the shaft diameter, even if a solid object such as a stone of a normal size enters, the spring will be compressed and the shaft 8 will lift up, causing the socket to become rough. Since the load roller 9 is lifted over the entire width of the container, there is a drawback that dewatering of the portion where no solid material is present is insufficient.

That is, providing the center hole 10 with a diameter larger than the shaft diameter in the load roller 9 is closely related to providing a plurality of load rollers 9. This is an essential requirement because it has the effect of sufficiently dehydrating the water.

The reason why the shaft 8 of the load roller 9 is urged downward by a spring is that when a particularly large solid object is mixed in, the shaft 8
It is an emergency safety device, so to speak.

A device that allows the screen to pass directly over the receiving roller without using a transfer member will be described with reference to FIG. 3 of the block diagram.

In this case, the receiving roller 7 is rotated in the direction of the arrow by the drive device.

The screen scraps are fed from a chute 1 onto a rotating receiving roller 7.

The screen dregs are dehydrated between the receiving roller 7 and the load roller 9, the dehydrated water returns to the rear, and the dehydrated screen dregs fall from the left side of the receiving roller 7.

If solid matter 11 enters, load roller 9 at that location
only is lifted.

The screen sludge dewatering device according to this invention is as described above, and is an extremely simple device that can be easily installed on the screen sludge transfer path, requires only a small equipment cost, and prevents solid matter such as stones from entering. Even if the load roller in that part is released, the solid material can be passed through, and normal dewatering can be continued in other parts.

Therefore, it is effective when applied to small-scale equipment.

[Brief explanation of the drawing]

Figures 1 and 2 are a schematic side view of one embodiment of the device according to this invention and a cross-sectional view taken along arrows -■■ in Figure 1, and Figure 3 is a configuration diagram of another embodiment of the device. . In the drawing, 1 is a chute, 2 is a belt, 3 is a drive pulley, 4 is a tail pulley, 5 is a skirt, 6 is a frame, and 7
is a receiving roller, 8 is a load roller shaft, 9 is a load roller, 10
is a central hole, and 11 is a solid substance.

Claims (6)

[Scope of utility model registration request] (1) A rotatable receiving roller provided horizontally and at right angles to the transport direction of screen scraps, and a load roller shaft provided approximately vertically above and parallel to the receiving roller,
It consists of a plurality of adjacent load rollers of the same diameter that are loosely fitted in a center hole with a diameter larger than the shaft diameter, and the natural hanging position of the load roller is a position in contact with the receiving roller or slightly above this. 1. A device for dewatering screen scum, characterized in that the screen scum is passed over a receiving roller directly or via a transfer member. (2) Claims for registration of a utility model characterized in that the transfer member interposed between the screen scum and the receiving roller to be passed is a belt of a belt conveyor, and the belt slopes upward in the direction in which the screen scum is transferred. The screen sludge dewatering device of paragraph (1). (3) The screen scum dewatering device according to claim (1), wherein the screen scum is directly passed over a receiving roller, and the receiving roller is rotated by a drive device. (4) The screen scum dewatering device according to claim (2) or (3), characterized in that skirts are provided on both sides of the screen scum transfer path near the receiving roller. (5) The screen dregs dewatering device according to claim (2) or (3), wherein the axis of the load roller is vertically adjustable. (6) Utility model registration claim No.
The screen sludge dewatering device according to item 2) or item (3).