JPS6129763B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a sand lifting device.

For example, a conventional sand pumping device in a sewage treatment facility will be explained based on FIGS. 3 and 4 are screens provided on the upstream and downstream sides of the settling basin 1, and 5 is a settling basin working room formed above the settling basin 1, A trolley 7 is placed on the rail 6 laid along the longitudinal direction of the sand settling basin 1 on the floor of the work room 5 in the direction of arrows A and B.
A jib crane 8 is disposed on the truck 7 so as to be movable in directions C and D, which are orthogonal to the traveling direction of the truck 7 (directions of arrows A and B). . 9 is a sand transporter.

In the above configuration, when removing the sediment accumulated on the bottom surface of the sand settling basin 1, the bucket 10 of the jig crane 8 is lowered and the bucket 10 grabs the sediment, and then the sediment is transferred to the hopper of the sand settling machine 9. 9a, and is carried out to a predetermined location by the carrying out machine 9.

In such a conventional sand pumping device, the structure is complicated because the jib crane 8 must be moved not only in the directions of arrows A and B but also in the directions of arrows C and D in order to remove the earth and sand on the entire bottom surface of the sand settling basin 1. Therefore, it is economically expensive, and it is necessary to increase the height of the work chamber 5.

Therefore, it is conceivable to arrange a screw conveyor on the bottom of the settling basin 1 to collect the sediment in one place, and then lift the sand with a bucket elevator or suck it up with a pump. If the conveyor is underwater and a large amount of earth and sand flows into the settling basin 1 at once due to a flood, etc., the conveyor may become buried and become inoperable.

The present invention provides a sand lifting device that solves these problems.

An embodiment of the present invention will be described below with reference to FIGS. 3 and 4. This embodiment relates to a sand pumping device in a sewage treatment facility, and a guide rail 11 is disposed along the longitudinal direction of each settling basin 1 on the ceiling of a settling basin working room 5 above each settling basin 1. A monorail bucket sand lifter 12 is suspended from a guide rail 11. In addition, the lower part of the side wall 21 of the sand settling tank 1 is connected to the bottom part 1 of the sand settling tank directly below the guide rail 11.
It is formed on a tapered surface 1b that tapers downward toward a. The width α of the sand bottom portion 1a is set to be slightly larger than the width β of the bucket 13 in the open state, and the inclination angle θ of the tapered surface 1b is set to be larger than the angle of repose. Note that 14 is the gate, 1
5 is a sand settling machine, and 16 is a skip hoist. Further, a top plate 22 is formed in the upper part of the sand settling basin 1 and continues to the side wall 21, and an opening 23 having a width slightly larger than the width β of the bucket 13 in an open state is formed in the top plate 22.

In the above configuration, when removing the sediment accumulated in the sand settling basin 1, the monorail bucket sand lifter 12
The bucket 13 is lowered from the state shown by the solid line in FIG. 4 as shown by the imaginary line in the same figure, and
to grab the earth and sand on the bottom part 1a, and then lift the bucket 13 and move the sand lifter 12 in the direction of arrow A to remove it from the hopper 9a of the sand transporter 9.
What is necessary is to bring it upward and open the bucket 13.

By the way, when the dirt on the bottom part 1a is removed by the bucket 13, the dirt on the tapered surface 1b slides down and is brought onto the bottom part 1a.
The bucket 13 only needs to be moved in the directions of arrows A and B.

In addition, since the top plate 22 was formed on the upper part of the sand bed 1, and the opening 23 with a width slightly larger than the width β of the bucket 13 was formed in this top plate 22, the portion of the top plate 22 other than this opening 23, i.e. The portion of the top plate 22 corresponding to the upper end of the side wall 21 can be made wider. As a result, a sufficiently wide working passage can be secured on the top surface of the top plate 22, and when it is necessary to close the opening 23, the lid member can be made small.

In the above embodiment, independent guide rails 11 were provided above each sand settling basin 1, and a monorail bucket sand lifter 12 was provided on each guide rail 11, but the guide rails 11 were connected. One zigzag-shaped guide rail may be formed, one monorail bucket sand lifter 12 may be suspended from the guide rail, and this sand lifter 12 may be moved in a zigzag shape.

As described above, according to the sand lifting device of the present invention,
The mechanical part consists of only a guide rail and a bucket sand lifter, and the configuration is very simple. It can be made smaller. In addition, the lower part of the side surface of the settling basin is formed into a tapered surface that tapers down toward the bottom of the settling basin directly below the guide rail, and the width of the bottom part is made slightly larger than the width of the bucket when it is open. ,
When the earth and sand on the bottom surface of the settling basin is removed by the bucket, the earth and sand on the tapered surface slides down and is brought onto the bottom surface of the settling basin. Therefore, all the sediment in the sediment basin can be removed simply by moving the bucket along the bottom of the settling basin and removing the sediment, and there is no need to move it back and forth and left and right like the conventional jig crane mentioned at the beginning. There isn't. In addition, a top plate was formed on the top of the settling basin, and an opening with a width slightly larger than the width of the frontage of the bucket was formed in this top plate, so the top plate other than this opening could be made wider. Not only can a sufficiently wide working path be secured on the upper surface of the top plate, but also the lid member can be made smaller when it is necessary to close the opening. Also, the mechanical part is located above the settling basin, so
Even if earth and sand enters the sand settling basin all at once, the sand lifting device will not malfunction.

[Brief explanation of the drawing]

1 and 2 show a conventional example, with FIG. 1 being a longitudinal sectional view and FIG. 2 being a sectional view taken along the line - in FIG. 3 and 4 show an embodiment of the present invention, with FIG. 3 being a longitudinal sectional view and FIG. 4 being a sectional view taken along the line - in FIG. 1...Sand settling basin, 1a...Bottom portion, 1b...Tapered surface, 5...Sand settling basin work room, 11...Guide rail, 12...Bucket sand lifter, 13...Bucket.

Claims (1)

[Claims] 1. A guide rail is provided above the sand settling basin, a bucket sand lifter is suspended from the guide rail so that it can run freely, and the bottom of the side wall of the sand settling basin is lowered toward the bottom of the sand settling basin directly below the guide rail. A tapered surface is formed, the width of the bottom part of the sand settling basin is formed to be slightly larger than the width of the bucket of the bucket sand pump in an open state, and a top plate that is continuous with the side wall is formed on the upper part of the sand settling basin, A sand pumping device characterized in that an opening having a width slightly larger than the width of the bucket in an open state is formed in the plate.