JP3657758B2 - Equipment for dewatering and discharging sediment such as sand - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to an apparatus for draining precipitates such as sand which are drained and forcedly dehydrated to reduce the water content.
[0002]
[Prior art]
Conventionally, bucket type, spiral type and rotary type classifiers are known, but in all cases, the sand drains poorly and the mud sand is treated just by separating the sediment such as sand from the water. It was difficult. Therefore, the inventor of the present application has developed a device for scooping up the sediment with a scooping bucket at the tip of the dewatering pipe provided radially, draining it with a draining net, forcibly dewatering with vacuum suction, and dropping it at the reversing part. .
[0003]
However, before forced dehydration by vacuum suction, the separated water that has passed through the drainage net is drained from the drainage section of the drainage chamber below the drainage net. Because it is short, the drainage cannot be sufficiently performed, so a lot of separated water remains in the drainage chamber. If vacuum suction is performed in a state where there is a large amount of residual water, water between the precipitates is sucked and the separated water is stored in the draining chamber, so the separated water is guided to the vacuum suction suction hose, resulting in poor vacuum suction. is there.
[0004]
To solve this problem, it is sufficient to drain the separated water sufficiently by slowly rotating the scooping bucket and increasing the time from the water surface to the vacuum suction. It was.
[0005]
[Problems to be solved by the invention]
Therefore, the present invention provides an apparatus for dewatering and discharging a precipitate that can improve the drainage and dewatering of the precipitate using vacuum suction and can perform the drainage process quickly.
[0006]
[Means for Solving the Problems]
For this reason, the present invention has a scooping bucket formed by opening the upper surface and attaching a draining body inside to make a scooping mounting portion above the draining body, and dividing the bottom of the draining body into a draining chamber, A drainage tank that is fixed to the scooping bucket and communicates with the draining chamber to guide the drained water, a rotating device that rotates a plurality of scooping buckets arranged radially in the radial direction, and each scooping bucket is almost In the range of rotational displacement upward from the horizontal state to the vertical state, suction means for sucking negative pressure in the drain tank, and during each suction operation, the drain hole of the drain tank is closed and each scooping bucket settles Lid opening / closing means that opens the drainage hole immediately after the object is scooped up from the water surface until the suction operation starts, and the excess separation water in the drainage tank connected to the drainage tank is suctioned Sometimes led An auxiliary tank for water storage, a dewatering discharge device deposits such as sand structure that includes a the discharging chute feed discharged undergoing precipitate falling from scooping bucket reversed.
[0007]
The sediment that has settled in the sedimentation chamber such as a sedimentation tank is scooped up by each scooping bucket that is rotated by a rotating device, and the sediment is drained and retained by the draining body. By draining and draining from the drainage hole of the drainage tank into the settling tank immediately after coming out of the water surface until vacuum suction, each of the scooping buckets rises and vacuums the inside of the drainage tank until it reverses Forcibly dewatering the sediment that is held in a vacuum at the bottom of the communicating scooping bucket, and the separated water is stored in the auxiliary tank, and the sediment is dropped to the discharge chute at the reversing section. . In addition, the drain hole is closed during the vacuum suction operation, and the separated water in the auxiliary tank passes through the drainage body and drains into the sedimentation tank before the inverted scooping bucket enters the water surface. It is.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, details of the present invention will be described with reference to illustrated examples. The apparatus shown in FIG. 1 to FIG. 4 is arranged in a sand settling tank 1, and the settling sand is continuously sent from a settling sand supply tank 11 connected to the settling tank 1.
[0009]
Reference numeral 2 denotes a rotating cylinder supported at the upper end of the sedimentation tank 1, which is fixed to a rotating shaft 20 that rotates continuously by a motor 21 provided at the rear portion and rotates in the vertical direction. A disc-shaped mounting body 22 is fixed to the center of the rotating cylinder 2 in the axial direction, and the scooping bucket 4 in which the drainage tank 3 is connected to the mounting body 22 through a large number of mounting arms 23 extending in the radial direction. Is fixed.
[0010]
That is, as shown in FIG. 3, the scooping bucket 4 is fixed to one end of the mounting arm 23 and the drainage tank 3 is fixed to the other side, and the drainage tank 3 is connected to the rear lower part of the scooping bucket 4. The drainage tank 3 is communicated with through a water passage hole 42 formed in a lower part of the bucket 4. Further, since the scooping bucket 4 is connected to one side of the drainage tank 3, it is in a state of projecting forward as shown in FIG.
[0011]
The scooping bucket 4 has an upper surface, a drainage body 41 inside, and is divided into upper and lower parts. The upper part of the scooping bucket 4 serves as a sediment placing part, and the lower part from the drainage body 41 serves as a drainage chamber 40 as a falling part of separated water. Yes. The tip shape of the scooping bucket 4 is inclined so that it can be easily scooped. Further, the drainage tank 3 is fixed to the scooping bucket 4 in a state where it is slightly lowered and inclined so that the separated water that has passed through the draining body 41 is easily passed.
[0012]
A drain hole 31 is provided at the lower end of the rear part of the drain tank 3, and a rubber lid 5 is provided in the drain hole 31 so as to be openable and closable. The lid 5 is fixed to the tip of a leaf spring arm 51 whose rear end is fixed to the mounting body 22 and is lightly pressed against the drain hole 31 to be closed.
[0013]
Further, an auxiliary tank 7 is connected to the rear portion of the drainage tank 3 through a water conduit 71, and the auxiliary tank 7 is supported by a support plate 221 of the attachment body 22.
[0014]
Reference numeral 6 denotes suction means, which operates the suction of the drainage tank 3 and the drainage chamber 40 in a vacuum state within a range in which each scooping bucket 4 is rotationally displaced upward from a substantially horizontal state to a vertical state. That is, as shown in FIG. 4, the suction pipe 62 connected to the suction side of the blower 61 that performs the vacuum suction action is connected to the fixed cylinder 63 in which the rotary shaft 20 is accommodated. The conduction groove 640 of the suction plate 64 is in a vacuum state. The conduction groove 640 is provided in a position from the substantially horizontal state to the vertical state in the suction plate 64, and the conduction groove 640 is opened on the front end surface.
[0015]
The control plate 25 is fixed to the rear end of the rotary cylinder 2, and through holes 250 that are equally spaced in the circumferential direction are passed through the control plate 25 to contact the suction plate 64. Reference numeral 33 denotes a suction hose, which is connected to each through hole 250 on the front surface of the control plate 25 and is open-connected to the front portion of the drainage tank 3 .
[0016]
In addition, 8 is the discharge chute installed in the center upper part, and is located under the scooping bucket 4 which raises and reverses.
[0017]
Next, the operation of this embodiment apparatus will be described. First, the rotating cylinder 2 is slowly rotated by the drive of the motor 21, and each scooping bucket 4 scoops the sand 9 settled at the bottom as shown in FIG. 1, and the separated water that has passed through the draining body 41 as shown in FIG. Falls into the draining chamber 40 and is stored in the drain tank 3 through the water passage hole 42. In this state, since the auxiliary tank 7 faces downward, the separated water does not flow into the auxiliary tank 7.
[0018]
When the scooping bucket 4 goes up from the water surface, as shown in FIG. 6, the lid 5 is pushed down by the weight of the separated water, the drain hole 31 is opened, and the separated water is drained and dropped into the sedimentation tank 1. Even at this time, the auxiliary tank 7 is in a downward or horizontal state, so that the separated water does not flow into the auxiliary tank 7.
[0019]
When the scooping bucket 4 rotates further upward, the conducting groove 640 of the suction plate 64 that is conducted to the suction pipe 62 by the operation of the blower 61 is always in a vacuum state. Within the rotational displacement range of the range S, the through hole 250 of the control plate 25 communicates with the conduction groove 64 by the suction hose 33. That is, the control plate 25 rotates integrally with the rotary cylinder 2 while contacting the suction plate 64, and the through hole 250 communicates with the conduction groove 64.
[0020]
As a result, the drainage chamber 40 is evacuated through the drainage tank 3 and the water passage hole 42, so that air from the outside passes between the sands 9 held by the scooping bucket 4, and water remaining between the sands 9 is removed. The sand 9 is wiped off and guided to the drainage tank 3, and the sand 9 is forcibly dehydrated.
[0021]
At this time, in the rotational displacement range of the arrow range S of FIG. 1 that is the suction action range, the lid 5 is strongly pressed against the drain hole 31 of the drain tank 3 by the restoring force and suction force of the leaf spring arm 51 as shown in FIG. As a result of the blockage, the outside air does not enter and good suction dehydration can be achieved. Further, the separated water dehydrated by vacuum suction is accumulated in the auxiliary tank 7 through the water guide pipe 71 which is directed upward at the lower position of the drainage tank 3.
[0022]
When the forced dehydration by vacuum suction is completed and the reversal starts, as shown in FIG. 2, the sand 9 falls to the discharge chute 8, and at this time, the water remaining in the drainage tank 3 and the auxiliary tank 7 is Since the drain hole 31 is closed by the lid 5, it does not fall into the sedimentation tank 1. Even when the lid 5 is opened by water pressure, the separated water in the drain tank 3 only falls into the sedimentation tank 1 and does not fall into the discharge chute 8.
[0023]
Then, the separated water remaining in the drainage tank 3 and the auxiliary tank 7 is reversed and when the scooping bucket 4 faces downward, as shown in FIG. It passes through and falls into the settling tank 1.
[0024]
Thus, according to this example, drainage and dewatering by vacuum suction are performed, and sand 9 without stickiness is obtained. What is characteristic in this example is that the separated water from the scooping bucket 4 is immediately returned to the settling tank 1 from the drain hole 31 and drained, but the scooping bucket 4 has a high rotational speed and all the separated water is drained. Even if it remains in the drainage tank 3, it flows into the auxiliary tank 7 and is stored together with the separated water sucked during the next suction action, so that the amount of water in the drainage tank 3 can be kept at a constant small amount. Therefore, the vacuum state in the draining chamber 40 can always be satisfactorily secured through the water passage hole 42, and the separated water does not enter the suction hose 33.
[0025]
Further, since the drainage tank 3 is disposed at the rear portion of the scooping bucket 4, the separated water falling from the drainage hole 31 is not positioned on the scooping bucket 4 below, so that it is not drained onto the scooping bucket 4 below. Since the suction hose 33 is connected to the drainage tank 3 side, the separated water is not directly sucked into the suction hose 33.
[0026]
Although the present embodiment is configured as described above, the present invention is not limited to this. For example, the shape of the scooping bucket and the material of the drainage body are not limited. Further, the shape of the drain tank and the auxiliary tank is also appropriate, and the auxiliary tank may be arranged so that the separated water in the drain tank can be guided and stored only during the suction action.
[0027]
In addition, the structure of the suction means for performing the suction operation in the drainage tank within the range in which each scooping bucket is rotationally displaced upward from the substantially horizontal state to the vertical state is also arbitrary. Furthermore, the structure of the lid opening / closing means that closes the drainage hole during the suction operation and opens the drainage hole during other than the suction operation is not limited, and may be opened and closed by an electromagnet. A rotating device that rotates the scooping bucket up and down is also appropriate, and a configuration of a discharge chute that receives and discharges the sediment falling from the reversing scooping bucket is also appropriate.
[0028]
【The invention's effect】
According to the first aspect of the present invention, the secondary vacuum dehydration is performed by air suction, and the precipitate having a high dewatering rate is discharged. Even if the separated water remains in the drainage tank before the vacuum suction action, the suction is performed. Since the separated water flows into the auxiliary tank during operation, the amount of water in the drainage tank can be kept at a constant small amount, so that the vacuum state in the draining chamber can be properly secured and good vacuum dehydration can be secured.
[Brief description of the drawings]
FIG. 1 is a partially cutaway rear view showing an embodiment of the present invention.
FIG. 2 is a side view partially cut vertically.
FIG. 3 is an enlarged perspective view of the scooping bucket and drain tank section.
FIG. 4 is a partially cutaway perspective view of the suction means.
FIG. 5 is a partially cutaway rear view just before the scooping bucket comes out of the settling tank.
FIG. 6 is a partially cutaway rear view of the scooping bucket in a state where it protrudes from the water surface of the settling tank.
FIG. 7 is a partially cutaway rear view showing a state where forced dehydration is performed by vacuum suction.
FIG. 8 is a partially cut-out rear view immediately before the scooping bucket is in a vertical state and the sand is dropped.
FIG. 9 is a partially cutaway rear view just before the scooping bucket is reversed and enters the water surface.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Precipitation tank 2 Rotating cylinder 253 Control board 3 Drain tank 31 Drain hole 4 Scoop bucket 41 Drainage body 42 Water drain hole 5 Cover body 51 Lid arm 6 Blower 64 Control plate 7 Auxiliary tank 71 Conduit pipe 8 Discharge chute 9 Sand

Claims (1)

The upper surface is opened and a draining body (41) is attached inside, so that the upper part of the draining body is scooped and placed, and the lower part of the draining body is divided into a draining chamber (40) (4) ), A drainage tank (3) that adheres to the scooping bucket (4) and communicates with the draining chamber and guides the drained water, and a plurality of scooping buckets (4) arranged radially in the radial direction. Rotating rotating device, suction means for sucking negative pressure in the drainage tank within the range in which each scooping bucket (4) is rotationally displaced upward from a substantially horizontal state to a vertical state, and drainage between each suction operation The drainage hole (31) of the tank (3) is closed and the drainage hole (31) is opened immediately after each scooping bucket (4) scoops up the sediment and rises from the surface until the suction operation starts. Opening / closing means for opening the lid, and drainage connected to the drainage tank (3) An auxiliary tank (7) that guides and stores excess separated water in the tank during suction operation, and a discharge chute (8) that receives and discharges the sediment falling from the reversing scooping bucket (4) An apparatus for dewatering and discharging sediments such as sand.

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