JP6456870B2 - Concrete slurry processing equipment - Google Patents

Description

  The present invention relates to a concrete slurry processing apparatus for appropriately processing a muddy water-like concrete slurry discharged together with cleaning water when a concrete mixer truck returned from a ready-mixed concrete delivery destination is cleaned.

As is well known, when ready-mixed concrete (referred to as return control) remains in the drum of the concrete mixer truck returned from the delivery destination in the ready-mix factory, when the concrete mixer truck is washed, a large amount of concrete slurry ( (Also called cement slurry) is discharged.
The processing apparatus shown in the following Patent Document 1 throws such a concrete slurry into a water tank, sinks solids such as gravel and sand to the bottom of the water tank, and scrapes the solids by driving a chain conveyor. On the other hand, a drain gate is formed by horizontally stacking a plurality of cylindrical members (hereinafter referred to as pipes) on one side of the water tank, and moisture in the concrete slurry is slightly spaced between the pipes. This water is re-used as washing water, and the solid content scraped by a chain conveyor is solidified by cement hydration so that it can be reused for roadbed materials.
Moreover, the processing apparatus shown by the following patent document 2 prevents the crevice between each pipe from being clogged by solid content by rotating the pipe which comprises the said drain gate, and expanding the clearance gap between each pipe. It ’s what you get.

Japanese Patent No. 4277057 Japanese Patent No. 5638487

By the way, in the above-mentioned conventional concrete slurry processing apparatus, since the concrete slurry thrown into the water tank flows directly to the part where the drainage gate is provided, there is no time for the solids to settle sufficiently, and from the drainage gate. There is a problem that a large amount of solid content is discharged, the problem that the drain gate is clogged frequently, and the entire water tank is stirred every time concrete slurry is added, so the solid content settles. There is a problem that is disturbed.
In addition, it is conceivable to increase the time in which the concrete slurry stays in the aquarium by enlarging the aquarium, but the size of the aquarium is limited by the size of the factory site and the manufacturing cost. There is a problem that you can not.
The present invention is intended to solve such problems.

  For this purpose, the concrete slurry processing apparatus according to the present invention forms an inclined surface portion that extends obliquely upward from the bottom surface portion of the water tank on one side of the water tank, and a chain conveyor equipped with a rake at an appropriate interval from the bottom surface portion of the water tank. On the other hand, a partition plate is provided upright in the center of the water tank so as to be parallel to the longitudinal direction of the water tank, and the water tank is provided in the first area and the second area. A draining gate formed by stacking a plurality of pipes in a horizontal manner so that the concrete slurry thrown into the first zone flows into the second zone by making a U-turn through the partition plate. Provided in the second zone so that moisture in the concrete slurry is discharged from the drain gate, and the chain conveyor is driven to move the rake from the bottom of the water tank along the inclined surface at a low speed. Let In wherein the solids precipitated in the first zone and the second zone of the water tank was set to be scraped fried on the inclined surface portion by the rake.

  The entire aquarium is prevented from being stirred, and the injected concrete slurry makes a U-turn on the partition plate and flows in the aquarium. Therefore, even if the aquarium is not so large, the solid content in the concrete slurry can be reduced. Sufficient residence time required for settling is obtained. For this reason, more solid content settles in the water tank, separation from moisture is promoted, and the supernatant water with less solid content is discharged smoothly from the drain gate, and the drain gate is clogged. Is prevented.

The longitudinal cross-sectional view of the concrete slurry processing apparatus which concerns on this invention. The top view of the concrete slurry processing apparatus which concerns on this invention. FIG. 3 is a sectional view taken along line AA in FIG. 2. BB sectional drawing of FIG. The CC arrow directional view of FIG.

  The water tank 1 of the illustrated processing apparatus is a flat rectangular shape composed of both side plates 2 and 3 made of steel plates, a rear side plate 4 and a horizontal bottom surface portion 5, and the upper surface is opened so that concrete slurry can be poured. . An inclined surface portion 6 is formed on the front side of the water tank 1 and extends obliquely upward from the bottom surface portion 5. The inclined surface portion 6 is inclined about 30 degrees with respect to a horizontal plane, side wall plates 7 a and 7 b are formed on both side edges of the inclined surface portion 6, and a discharge port 9 is opened at the upper end portion of the inclined surface portion 6. And the partition plate 10 which consists of a steel plate is provided in the standing shape so that it may become parallel to the longitudinal direction of this water tank 1 in the approximate center of this water tank 1, The inside of this water tank 1 is 1st area | region 1a and 2nd area | region 1b. Divide into two parts. Since the partition plate 10 does not reach the vicinity of the inclined surface portion 6 and is provided with a notch 11, the first zone 1 a and the second zone 1 b are connected to the notch 11. Communicate.

  In addition, chain conveyors 13 a to 13 d with rakes 12 mounted at appropriate intervals are disposed so as to rotate from the bottom surface portion 5 of the water tank 1 to the inclined surface portion 6. That is, by providing bearings 14a and 14b on the side wall plates 7a and 7b at the upper end of the inclined surface portion 6, the rotary shaft 15 is rotatably supported, and the sprockets 16a to 16d are fixedly installed on the rotary shaft 15. A motor 19 and its speed reducer 20 are installed on a base 18, and a transmission chain 23 is wound around a sprocket 21 fixed to the rotary output shaft of the speed reducer 20 and a sprocket 22 fixed to one end of the rotary shaft 15. As a result, the drive unit 24 is configured, and chain conveyors 13a to 13d formed endlessly by linking a large number of links are wound around the sprockets 16a to 16d, and the bottom portion 5 of the water tank 1 The guide wheels 26a to 26d are rotatably supported by the rotation shaft 25 at the boundary with the inclined surface portion 6, and the chain conveyor 13 is provided below the guide wheels 26a to 26d. ˜13d are slidably contacted, and the rotating shaft 27 penetrating the partition plate 10 is rotatably supported by bearings 28a and 28b at the other end of the bottom surface portion 5 as shown in FIG. 27, the other portions of the chain conveyors 13a to 13d are wound around guide wheels 29a to 29d fixedly provided on the belt 27. As a result, when the drive unit 24 is operated, the chain conveyors 13a to 13d rotate in the direction indicated by the arrow in FIG. 1 across the bottom surface 5 and the inclined surface 6 of the water tank 1, and the rake 12 is moved. It moves slowly from the bottom surface portion 5 along the inclined surface portion 6 at a low speed.

  Also, as shown in FIGS. 4 and 5, a plurality of pipes 30 a to 30 g are stacked horizontally on a side of the second area 1 b and away from the notch 11. A draining gate 31 is provided, and the draining gate 31 forms one side wall of the second region 1b of the water tank 1. The drainage gate 31 is formed in a gate shape by setting up support columns 32a and 32b made of channel members at appropriate intervals, and by providing a horizontal support column 32c on the support columns 32a and 32b, and between the support columns 32a and 32b. The pipes 30a to 30g are loosely fitted to support the pipes 30a to 30g so that the pipes 30a to 30g can move up and down, and the pressing member 34 is attached downward by a bar 33a and a spring 33b fixed to the horizontal column 32c. Then, the pressing member 34 is brought into contact with the upper surface of the uppermost pipe 30a to elastically push down the pipes 30a to 30g, and further, a lever is attached to the outer peripheral surface of the pipes 30b to 30g located below the pipe 30a. 35b to 35g are projected, and the operating rods of the cylinders 36b to 36g supported by the horizontal column 32c are connected to the levers 35b to 35g via pins, and the cylinders 36b to 36g are connected. By stretching operation and respective pipe 30b~30g is so as to rotate. In addition, the wedge-shaped projections 37 are fixed to the outer peripheral surfaces near both ends of the pipes 30b to 30g, and the projections 37 intervene between the pipes 30a to 30f when the pipes 30b to 30g are rotated. A gap between the pipes 30a to 30g is appropriately enlarged. In addition, a drain guide member 38 is formed in a bowl shape projecting outward on the lower outer side of the drain gate 31, and a drain receptacle 39 is disposed outside the drain guide member 38.

  In the concrete slurry processing apparatus configured as described above, as shown in FIG. 2, the concrete mixer truck 40 is stopped beside the water tank 1 so as to face the first region 1 a, and the concrete mixer truck 40 is in a muddy water state. The concrete slurry is charged into the first zone 1a. In addition, the partition plate 10 is formed tall so that the concrete slurry discharged from the concrete mixer truck 40 does not directly enter the second region 1b. As shown by the arrow in FIG. 2, the concrete slurry charged into the first zone 1 a flows through the first zone 1 a toward the notch 11 along the partition plate 10, and makes a U-turn at the notch 11. Flows to the second zone 1b and reaches the drain gate 31 provided at the end of the second zone 1b. In this way, the concrete slurry flows by making a U-turn through the partition plate 10, so that the time until the concrete slurry reaches the drain gate 31 becomes longer. For this reason, even if the water tank 1 is not so large, a necessary and sufficient time for the solid contents such as gravel and sand in the concrete slurry to settle is obtained, and the solid contents 41 accumulate on the bottom surface portion 5 of the water tank 1. .

  Then, the chain conveyors 13a to 13d are driven, and the solid content 41 accumulated on the bottom surface portion 5 is slowly moved at a low speed toward the inclined surface portion 6 by the rake 12, and the solid content 41 is lifted up on the inclined surface portion 6. . In addition, by slowly moving the rake 12 at such a low speed, the solid content 41 settled in the water tank 1 is prevented from rising again, and the solid content 41 slowly moves upward on the inclined surface portion 6. Thus, the moisture in the solid content 41 flows down on the inclined surface portion 6 and returns to the water tank 1. For this reason, draining is improved, and the solid content 41 with a small water content is discharged from the discharge port 9. In addition, since the solid content 41 discharged from the discharge port 9 is hardened into a hard lump by the hydration reaction of the cement, it is disposed of as a stable waste or is crushed with a crusher and then used for applications such as roadbed materials. be able to.

  On the other hand, the supernatant water in the concrete slurry flows to the drain gate 31 and is discharged from the gaps between the pipes 30a to 30g to the drain receptacle 39 outside the water tank, and the discharged water is temporarily stored in a tank (not shown). After being stored, the concrete mixer truck 40 is reused as washing water when washing. The drainage gate 31 is stacked so that the pipes 30a to 30g are in line contact with each other, and is pressed down elastically by the pressing member 34 from above, so that the solid content in the concrete sludge passes through the gap. While damming without being carried out, moisture flows out from a slight gap between the pipes 30a to 30g. Further, by expanding and contracting the cylinders 36b to 36g, the pipes 30b to 30g rotate, and the protrusions 37 are sandwiched between the pipes 30a to 30g, so that gaps between the pipes 30a to 30g are obtained. Therefore, by appropriately expanding and contracting the cylinders 36b to 36g, solid contents such as fine sand adhered to the gap are discharged, and clogging is eliminated.

  Since the concrete slurry processing apparatus which concerns on this invention partitions off the inside of the water tank 1 by providing the partition plate 10 as mentioned above, it can sink more solid content in concrete slurry to the bottom face part 5. FIG. That is, the partition plate 10 is provided upright in the center of the aquarium 1 so as to be parallel to the longitudinal direction of the aquarium 1, and the concrete slurry is poured into the first zone 1a from the concrete mixer truck 40 or the like. Thus, since the fast flow of the concrete slurry in the water tank 1 when the concrete slurry is charged hits the partition plate 10, the entire water tank 1 is not stirred at the time of charging, and the concrete slurry is Since the partition plate 10 is U-turned from the first zone 1a and flows to the second zone 1b and reaches the draining gate 31, more solid content 41 is allowed to settle on the bottom surface 5 of the water tank 1 in the meantime. Can do. For this reason, even if the water tank 1 is not enlarged, the solid-liquid separation performance can be remarkably improved, moisture is always discharged smoothly from the draining gate 31, and the draining gate 31 is frequently clogged as in the past. Disappear.

  The concrete slurry processing apparatus according to the present invention is not limited to the ready-mix factory, but also to the cement produced when cleaning equipment such as mixers, hoppers and molds in concrete secondary product factories such as fume pipes, utility pole piles, and concrete blocks. It can be used to treat the wastewater contained and to treat excess concrete slurry.

DESCRIPTION OF SYMBOLS 1 Water tank 1a 1st area | region 1b 2nd area | region 5 Bottom face part 6 Inclined surface part 9 Outlet port 10 Partition plate 11 Notch part 12 Rake 13a-13d Chain conveyor 24 Drive part 30a-30g Pipe 31 Drain gate 40 Concrete mixer truck 41 Solid content

Claims (1)

  An inclined surface portion that extends obliquely upward from the bottom surface portion of the water tank is formed on one side of the water tank, and a chain conveyor equipped with a rake is disposed so as to rotate from the bottom surface portion of the water tank to the inclined surface portion. On the other hand, a partition plate is provided upright in the center of the water tank so as to be parallel to the longitudinal direction of the water tank, and the water tank is partitioned into a first area and a second area, and the water tank is put into the first area. The concrete slurry is U-turned through the partition plate and flows to the second area, and a draining gate formed by stacking a plurality of pipes horizontally is provided in the second area. The water in the slurry is discharged, and the chain conveyor is driven to move the rake from the bottom surface portion of the water tank along the inclined surface portion at a low speed, thereby allowing the first region and the second region of the water tank to be discharged. The solids settled in the area掻揚 type cement sludge treatment apparatus being characterized in that as fried scraping on the inclined surface portion by.

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