JPH0334377B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a classifier that sediments and separates solids from a liquid mixture, and more particularly relates to a sand classifier.

Conventional sand classifiers include those that discharge using a spiral conveyor, and those that scrape out using a rake.
In addition to the belt conveyor, which collects the sediment in the drum on a belt conveyor, and the one that collects the sediment in the drum at one end using a spiral and takes it out using radial scraping blades and a conical chute, there are also belt conveyors. There are also known methods for taking out what has settled on the top.

These known methods have advantages and disadvantages in terms of fine sand recovery rate, amount of mud contained in the sand, moisture content in the sand, operation management, repair/replacement, durability, and upsizing, and are not necessary. I can't say it's perfect either.

An object of the present invention is to provide a classifier which greatly improves the processing efficiency and which can ideally classify fine particles.

A feature of the present invention is that a classifier is constructed from a water tank, a carry-out conveyor to the outside of the water tank, and a screw conveyor disposed inside the water tank and having a direction of transfer to the carry-out conveyor.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view, FIG. 2 is a side view, and FIG. 3 is a plan view. 1 is a water tank, 2 is a bucket conveyor,
3 and 3' are ribbon screw conveyors, and 4 is a drive source consisting of a motor. A bucket conveyor 2 for carrying out is vertically arranged in the center of the water tank 1, and the upper part of the bucket conveyor 2 is exposed to the upper part of the water tank 1. The bucket conveyor 2 has a driving sprocket 5 consisting of wheels placed in a water tank, driven sprockets 6 and 7 consisting of wheels arranged parallel to the upper part of the water tank, and a chain 8 with a bucket 9 attached thereto. The bucket bags 9 are attached continuously without any intervals in the front and back. Ribbon screw conveyors 3 and 3' are arranged on both the left and right sides of the bucket conveyor 2. The drive sprocket 5 of the bucket conveyor 2 and the ribbon screw conveyor 3, 3' are connected to one shaft 1.
0 in common, and when this shaft 10 rotates, the bucket conveyor 2 is arranged so that the bucket 9 scoops up the sediment in the water tank, and the left and right ribbon screw conveyors 3,
As for 3', the screw blade 3a is formed in a spiral shape so as to be transferred in the direction of the bucket conveyor 9. This shaft 10 is rotated by motion transmission from a drive source 4 outside the aquarium. The shaft 10 is supported by a bearing 10B, and the radius of the sprocket 5 is increased so that the bearing 10B is positioned above the water surface of the water tank 1. As the shaft 10 rotates, the bucket conveyor 2 scoops up the sediment with the bucket 9, and the bucket is further transferred to the upper part of the conveyor. A generator 11 applies vibration to the bucket cart 9, and a vibration generator 12 applies vibration to the bucket cart 9 on the way down from the sprocket 7. One vibrator may be used for both purposes. The shafts of the driven sprockets 6, 7 are fixed in mounting openings consisting of elongated holes 6', 7', so that the mounting positions of the sprockets 6, 7 can be changed. The width of the screw blades 3a of the ribbon screw conveyor 3 is gradually increased from the left toward the center, that is, in the transport direction, relative to the distance 3b from the shaft 10. In this embodiment, a ribbon screw conveyor was adopted as the screw conveyor because the width of the blade 3a constituting the screw was made as small as possible so as not to strongly agitate the liquid in the water tank. In the example, the width of the screw blade 3a is gradually increased toward the shaft 10 toward the center, that is, toward the transfer direction. That is, since the width of the screw blade 3a is made wider in the direction of the axis 10 (that is, the width is increased) in order from the outside of the tank where the amount of settled solids is small to the center of the tank where the amount of solids is large, Even if the solids are transferred toward the bucket conveyor 2 in the center of the tank, agitation in the tank 1 can be minimized. Reference numeral 13 denotes an input hopper for the solid-liquid mixture, and the liquid mixture falls at the front part (left side in FIG. 2) of the lower part of the bucket conveyor 2 where it is scooped up. Reference numeral 14 denotes a jamb board that suppresses disturbance of the liquid in the aquarium.

The wall board 14 partitions the inside of the water tank 1, and by blocking the flow of the liquid in the water tank 1, it calms the liquid, promotes the settling of solids in the liquid, and also makes it possible for fine particles to settle. It is something to do. Jiyama board 1
4 is provided inside the ribbon screw conveyor 3 in this embodiment and is shown as a disk that rotates integrally with the ribbon screw conveyor 3; It can also be composed of a semicircular plate.
15 is a gutter that receives water overflowing from tank 1;
Water is collected in the holes 16 and taken out to the outside. 17
is the discharge hopper.

One embodiment of the present invention configured as described above operates as follows.

When the drive source 4 rotates, the shaft 10 rotates and the bucket conveyor 2 and ribbon screw conveyors 3, 3' operate. When the mixed liquid is inputted from the input port 13, solids having a relatively larger specific gravity than the liquid sink to the bottom of the water tank 1, are scooped up by a bucket 9, and transferred to the upper part of the conveyor by a chain 8. To Bucket 9 when Bucket 9 rises,
Since vibration is applied from the vibrator 11, the liquid scooped up together with the solids in the bucket 9 is separated to the upper part of the bucket, and at the same time, the solids are solidified in the bucket 9 at a high density. This is because when sand containing a large amount of water is vibrated, the distance between the sand particles narrows.
This phenomenon occurs because the water contained in the sand is forced out, and since the specific gravity of the sand is greater than the water, the water collects above the sand, and in the end only water collects on the top surface of the sand.

Next, when the bucket is transferred from the sprocket 6 to the sprocket 7, the liquid in the bucket 9 will fall out of the bucket, but the solid will not fall out of the bucket 9 because it is solidified in the bucket at a high density. For this reason, sprocket 6
The transition from sprocket 7 to sprocket 7 can be referred to as a dewatering or draining process, and its lateral length is determined to ensure sufficient drainage.

Next, when the bucket 9 reverses down the sprocket 7, the bucket 9 is vibrated by the vibrator 12, and the solids in the bucket 9 after draining are discharged outside the bucket 9. are attached to the chain 8 continuously without gaps, the curve of the receiving surface of the bucket 9 in front serves as a chute, and the solid falls in a parabola. The solid after draining is discharged from the chute 17 to the outside of the machine. Since the sprockets 6 and 7 can be repositioned by the slotted holes 6' and 7', the angle of the chain 9 between the sprockets 6 and 7 can be changed to ensure proper water drainage, and at the same time the tension of the chain can be adjusted. I can do it. On the other hand, if the solids in the mixed liquid that has spread to the left and right sides of the water tank 1 are transferred to the central bucket conveyor 2 by the ribbon screw conveyors 3 and 3', respectively.
It is transferred to the position and carried out of the machine by the bucket conveyor 2. In this way, the solids in the water tank 1 are forcibly transferred to the bucket conveyor 2 by the ribbon screw conveyors 3, 3', so that the effective volume of the water tank can be increased. The fact that ribbon screw conveyors 3 and 3' are used as the screw conveyor, and that the screw blades 3a are formed to be narrower as the distance from the bucket conveyor 2 increases, and that there is a wall plate 7 is that This suppresses disturbance and further contributes to preventing the flow away of fine particles. Under the conditions of the water tank 1 having such a large effective volume and no disturbance, the fine particles are efficiently settled and transported out of the machine by the bucket conveyor 2 via the ribbon screws 3, 3'. The precipitated solid and the separated liquid flow from the water tank through the overflow gutter 15 and are taken out of the machine through the hole 16.

The present invention, which is configured and operates as described above, has the following effects. In the present invention, since the aquarium is provided with a conveyor for carrying out out of the aquarium and a screw conveyor placed inside the aquarium and having a direction of transfer to the above-mentioned carrying out conveyor, the effective volume of the aquarium can be increased, and therefore the classification processing efficiency can be increased. can be improved. Furthermore, when the screw conveyor is placed deep in the water tank, there is no disturbance near the liquid surface, which prevents the particles from being washed away, resulting in high sedimentation efficiency, and the particles can be carried out efficiently. When a ribbon screw conveyor is used as the screw conveyor, when the conveyor blades of the ribbon screw are gradually narrowed from the center of the aquarium toward the outside, or when a wall plate is installed, each It is possible to suppress the disturbance of the liquid in the water tank as much as possible and contribute to the precipitation and recovery of fine particles. When the buckets of a bucket conveyor are installed continuously at intervals, solids can be discharged from the buckets by drawing a parabola using the curve on the back of the conveyor just before. If a plurality of sprockets are provided at the top of the bucket conveyor, the liquid will fall out when the bucket moves over the top of the bucket conveyor, so only the solids can be efficiently taken out. If vibrations are applied to the bucket while it is moving to the top of the bucket conveyor, solids and liquids will be separated in the bucket, which will further increase the density of the solids and cause the bucket to move over the top of the bucket conveyor. During the transfer, the liquid easily escapes, and the solids solidify in the bucket, so the solids do not escape. If vibrations are applied when the buckets of the bucket conveyor are reversed downwards, the solids can be discharged more completely from the buckets. If the multiple sprockets at the top of the bucket conveyor are equipped with elongated holes so that the sprocket positions can be adjusted, the transition angle of the bucket can be changed to better drain water from the top of the bucket conveyor. . When screw conveyors are placed on both sides of the central bucket conveyor, solids can be forcibly conveyed from the other side, which increases the efficiency of taking out solids, compared to a system where the screw conveyors are forced to convey from only one side to the bucket conveyor. will improve accordingly. The structure is simple because the left and right screw conveyors and the central bucket conveyor are connected and operated by a single shaft. It is possible to realize a classifier with a simple and compact structure that has good classification efficiency and fine particle recovery efficiency as described above.

It goes without saying that the present invention is not limited to the one embodiment described above. For example, the conveyor for carrying out the water out of the aquarium is not limited to a bucket conveyor, and may be replaced with other means such as a spiral conveyor, rake conveyor, belt conveyor, etc., which can be considered as carrying out means. Furthermore, in the case of a bucket conveyor, the number of sprockets is 1 at the top and bottom.
One by one is fine. In addition, screw conveyors are not limited to ribbon screw conveyors, but also include all screw conveyors such as spiral screw conveyors, as well as equivalent means.
It also includes the installation of a screw conveyor and other means to transport the solids in the aquarium to the aquarium removal device.
The number of these screw conveyors etc. may be any number.

Further, in this embodiment, the baskets were attached continuously, but the present invention also includes a case where the baskets are attached at intervals. The vibrator may or may not be provided as appropriate. The present invention is not limited to the above-mentioned embodiments, as the shape of the water tank and other points can be adopted as appropriate.

In addition, when the radius of the lower sprocket 5 is made larger than the water surface of the water tank 1, and the shaft 10 and its bearings are located above the water surface, there is no wear of the bearings due to sand-containing water, and durability and reliability are improved. However, this requirement is not necessarily the essence of the present invention and is merely a more preferred embodiment.

Also, the cutting board is Rivoscrew Conveyor 3,
It may be attached to the inner side of the blade 3' in the form of a disk or an annular disk, but it may also be attached in the form of a semi-disc or a semi-annular disk suspended from the shaft 10. If possible, it is preferable to attach a rotation bearing to the shaft 10 and suspend it from this.

Furthermore, the present invention can also be applied to the sorting of low specific gravity substances in sand, such as pumice, wood chips, etc., as shown in FIG. That is, sand mixed with pumice is sent into the hopper 22 by the belt conveyor 21, and then thrown into the guide passage 23. On the other hand, there is an inlet 24 for supplying fresh water into the tank, and fresh water is supplied from here. The overflow outlet 25 is the guide passage 2
3, the overflow flow flows upward through the guide passage 23. Therefore, pumice, wood chips, etc. flow out from the outlet 25 along with the water flow, and only sand accumulates at the bottom of the tank. This sand scooping process is as described above, so the explanation will be omitted.

[Brief explanation of drawings]

FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is a side view, FIG. 3 is a plan view, and FIG. 4 is a side sectional view showing an embodiment of a low specific gravity material sorting device. 1: Water tank, 2: Bucket conveyor, 3, 3':
Ribbon screw conveyor.

Claims (1)

[Scope of Claims] 1. A water tank into which muddy water is introduced, a bucket conveyor that scoops and discharges sediment accumulated at the bottom of the tank, and a bucket conveyor that collects the sediment to a position where it is scooped out. What is claimed is: 1. A classifier comprising: a screw conveyor provided as shown in FIG. 2. In claim 1, the bucket conveyor is provided vertically, and the radius of the lower foil is increased so that the bearing of the lower foil is positioned higher than the water level of the water tank. Classifier. 3. The classifier according to claim 1, characterized in that the bucket conveyor moves in the horizontal direction while being guided by two upper foils above. 4. The classifier according to claim 3, characterized in that one or both of the two upper foils are provided to be movable in the vertical direction. 5 A water tank into which muddy water is introduced, a bucket conveyor that scoops and discharges sediment accumulated at the bottom of the tank, and a ribbon provided to collect the sediment at a position where it is scooped out by the bucket conveyor. 1. A classifier comprising a screw conveyor, a vibrator that applies vibration to the bucket conveyor, and a shim plate provided inside the ribbon screw conveyor. 6. In claim 5, the bucket conveyor is provided vertically, and the radius of the lower foil is increased so that the bearing of the lower foil is located at a higher position than the water level of the water tank. Classifier. 7. The classifier according to claim 5, characterized in that the bucket conveyor is guided upwardly by two upper foils to perform horizontal movement. 8. The classifier according to claim 7, characterized in that one or both of the two upper foils are provided to be movable in the vertical direction. 9 A water tank, a raw material guide passage provided in the water tank, an overflow and floating outlet provided above the raw material guide passage, a water inlet for supplying fresh water into the water tank, and the raw material guide passage. a hopper for feeding raw materials into the water tank; a bucket conveyor for scooping and discharging the sediment accumulated at the bottom of the water tank; a screw conveyor for collecting the sediment at a position where it is scooped by the bucket conveyor; A classifier characterized by comprising a vibrator that applies vibration to a bucket conveyor.