JP2521619B2 - Double turbine type Trommel - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for recovering aggregate such as sand and gravel from return concrete in which raw concrete remains in a concrete mixer truck and washing and drainage of the mixer truck. .

[0002]

As a conventional aggregate recovery methods, and that scoop up sand sand intersection Ri screw conveyor from the sludge tank after classifying the coarse aggregate a cylindrical wire mesh or the like to rotate (A), or, (B ) Inside a fixed horizontal semi-cylindrical tank, a classification drum in which screws are wound on both inner and outer surfaces of a concentric cylindrical wire net with a diameter slightly smaller than the cylinder is provided, and the outer screw slides on the inner surface of the semi-cylindrical tank. The inner screw is designed to transfer the coarse aggregate toward the outlet, and the outer screw pushes sand to one side, and it is lifted up by one of the raising blades on one side of the classification drum. There is an aggregate collecting device or the like that discharges to the outside or (C) the inside of a rotating horizontal cylindrical drum is partitioned by a donut-shaped partition plate, and a mixing washing tank, an overflow transfer chamber, and a trommel tank are sequentially formed from the upstream side. .

Further, as the prior art of the applicant relating to the present application, (D) a trommel for coarse aggregate and a trommel for fine aggregate are installed on the same frame with a step, and sludge containing coarse aggregate is mixed. 1990 patent application No. 418802 "Double water turbine type Trommel" for continuous classification and collection
There is

[0004]

[Problems to be Solved by the Invention] Conventional (A), (B)
The method of (1) is a one-tank type in which sludge directly flows into the main tank, so the aggregate that contains the trommel inside and is classified is sent to the surface of the water by a screw conveyor or scraping blades. . Therefore, when there is return concrete, the sludge concentration becomes extremely high, and the cement component adheres to the collected aggregate, so it cannot be reused as it is. In addition, since the one-tank type directly receives the washing wastewater of the mixer truck, there is a large difference in the inflow amount, and the trommel is constantly rotating in the tank. Turbulent flow occurs when the mixer truck drains, and fine sand drains. It will be caught in and discharged to the drainage port side, resulting in poor fine sand collection.

The type (C) is a two-tank type,
The sludge that flows in enters the first tank, where the aggregate is scooped with the blades and enters the second tank. This tank has a trommel built-in to perform the classification and rinsing of the aggregate, so that the recovered aggregate can be washed with water. There is an advantage that is sufficient, but since it rotates as one and two tanks integrally, turbulent flow occurs in the first tank,
There are drawbacks that the fine sand recovery is poor and that it is difficult to clog, maintain and replace the trommel wire net built in the second tank.

The method (D) is a double water turbine type trommel, and has an advantage that the aggregate to be collected can be automatically lifted upward, and the coarse aggregate is collected in the first tank and the turbine bucket in the second tank. It has the advantage of being able to reliably collect fine sand because it sinks into each bucket while draining it as overflow water while pumping it sequentially, but it lacks a washing process like the above (A) and (B) methods. .

In view of these drawbacks, in the present invention, an aggregate that can be reused as an aggregate for ready-mixed concrete with a small amount of make-up water for the purpose of complete recovery of fine sand and improvement of treatment capacity, and trommel. The present invention has been made for the purpose of reducing the clogging of No. 1 and easily cleaning the inside of the trommel, and the mechanism capable of coping with both the general car wash water treatment and the return concrete treatment.

[0008]

[Means for Solving the Problems] Horizontal draining drum 1
In the twin water turbine type trommel in which the classifying drum 2 and the classifying drum 2 are concentrically connected to each other on the one stand with the short pipe 8 interposed therebetween, the draining drum 1 is made rollable by the support roller 3 of the stand. A donut plate is used as both side plates 5.5 ', and a water turbine type continuous pumping bucket 11 is provided in the drum. An overflow receiving toy 12 with a downward slope in the direction of the classification drum is provided on the rear surface of each pumping bucket, and the overflow receiving toy 12 is provided near the classification drum.
The plate 5'is attached to the discharge port 13 and an overflow hole 14 is formed adjacent to the discharge port 13 of the side plate. Sludge inlet-side end of the overflow receiving toy 12 of leave receiving
A missing portion 23 is provided. Open the side plate inside the draining drum.
A fixed chute 19 inclined from the hole toward the classification drum is provided and held by a fixed chute support rod 20 from the outside of the drum.

The classification drum 2 is a cylindrical trommel 6 in which a cylindrical frame body 24 is wound with a wire mesh or the like, and is a cone of a perforated plate.
It is called a classification drum including the stand 9. The cylindrical trommel,
It is arranged in a fixed semi-circular water tank 15 in a waterlogged manner. The cylindrical g
End of Rommel fixing a truncated cone 9 of the perforated plate, the tip is rotatably supported by the support rod 10. On the outer circumference of the cylindrical trommel , independent two-part external feed screw-shaped blades 18 are formed by sandwiching a plurality of connecting rods to form a screw frame body 17, which is formed at the edges of both ends of the cylindrical frame body 24. A driving claw (not shown) and a driven claw (not shown) formed at both end edges of the screw frame 17 are rotatably provided. The water from the classification drum discharge port 25 merges with the water from the discharge port 13.
I do.

[0010]

The function of the present invention is that aggregate-containing sludge flows in from the outside.
It flows into the draining drum 1 through a pipe 24, and here it is mostly
Minute cement sludge is separated and the remaining water mixed solid
The object advances to the classification drum through the fixed chute 19.
Since the washing water is full in the semi-circular aquarium,
Aggregate washed completely with water is divided into gravel and sand, and each is discharged.
28, 29 is discharged to the outside of the machine. Firstly, in the draining drum, the aggregate is forcibly pumped up in a fixed amount by a water wheel-shaped pumping bucket, so that a sedimentation action occurs in each pumping bucket and fine sand is collected. Be certain. Also,
The sludge flowing in from the inflow pipe 24 is directly sunk into the toy due to the lack 23 of the overflow toy in the direction of the inlet.
It works to prevent the inflow of mixed sludge. Secondly, since it is a pumping type with a continuous bucket, it is possible to always supply a fixed amount to the classification drum, so that there is no difficulty in trommel. Thirdly, since the drained aggregate is put into the classification drum, it is sufficient to use makeup water in the submerged aquarium. In addition, since the makeup water can be easily adjusted, the cleaning is always reliable. Fourth, temporarily remove the bucket from the inflow pipe.
When a large amount of sludge more than the pumped-up amount is flowed in, the water level rises, so that a certain amount or more of water is discharged to the outside of the tank by the overflow hole 14 and the recovery efficiency is not hindered. Fifthly, the sand feeding screw on the outside of the cylindrical trommel is independent of the cylindrical frame and is divided into two parts, and the cylindrical trommel is immersed in the semicircular fixed tank, so the upper half is open. Therefore, there is an effect that work such as clogging removal and replacement of the wire mesh is very easy.

[0011]

Embodiments of the present invention will be described with reference to the drawings. 1 is a front internal structural view, FIG. 2 is a plan view, FIG. 3 is a side view along AA ′ direction, and FIG. 4 is a side view along BB ′ direction.

A water turbine type water draining drum 1 is provided on a horizontally installed frame, a rail is wound around the outer periphery of the water draining drum 1 and pivotally mounted on a support roller 3 on the frame, and a sprocket wheel is provided adjacent to the rail. It is made to circulate and can be rotated by a drive motor via a winding chain 4 .

Both side plates 5 and 5'of the draining drum are donut-shaped. On the downstream side of the draining drum, the same classification core
A ram 2 is provided and is connected by a short pipe 8.

The rear end of the cylindrical frame 24 is a truncated cone 9 of a perforated plate.
And the end portion is pivotally supported by the support rod 10 .
The draining drum forms a large number of radial pumping tanks by means of a water wheel type pumping bucket 11.

The pumping bucket 11 is inclined to the downstream side, and an overflow receiving toy 12 is provided on the back surface thereof and is connected to the discharge port 13 of the downstream side plate. The overflow receiving toy 12 is provided with a missing portion 23 at a part of the upstream side. Also between the adjacent outlet are provided respectively overflow hole 14.

A semi-circular water tank 15 is provided so as to be in sliding contact with the lateral feed blades on the outer circumference of the cylindrical frame . On the inner surfaces of the cylindrical frame and the truncated cone 9, feed vanes 22 are provided to feed in the exit direction.

The sand feeding screw blade 18 is arranged so as to be fed laterally in the direction of the scraping blade 16, and is independent of the classification drum and is divided into two parts.

In the draining drum , when the aggregate lifted by the pumping bucket falls due to gravity,
A fixed chute 19 that slides into the classification drum is provided, and is held by a fixed chute support rod 20 on the gantry side. The other end is slidably supported by the receiving roller 21 on the short pipe side.

[0019]

As is apparent from the above detailed description, the two major goals, which cannot be achieved by the conventional equipment, can be achieved. That is, first, fine sand can be efficiently collected. Secondly, it is possible to collect aggregates that can be reused reliably and with water. In addition, it is a double-turbine type trommel that has various effects such as a marked improvement in treatment efficiency.

[Brief description of drawings]

[Figure 1] Front partial cutaway internal structure diagram

FIG. 2 is a plan view

FIG. 3 is a side view taken along the line AA ′.

FIG. 4 is a side view of the BB ′ direction.

[Explanation of symbols]

1 Draining Drum 2 Classifying Drum 3 Support Roller 4 Winding Chain 5 Side Plate 5'Side Plate 6 Cylindrical Trommel 8 Short Tube 9 Frustum 10 Support Rod 11 Lifting Bucket 12 Overflow Receiving Toy 13 Discharge Port 14 Overflow Hole 15 Semi-Circular Water Tank 16 Raising Blade 17 Screw frame 18 Sand feeding screw blade 19 Fixed chute 20 Fixed chute support rod 21 Receiving roller 22 Feed blade 23 Missing part 24 Inflow pipe 25 Wire mesh 26 Groove for scraping blade 27 Semicircular water tank overflow hole 28 Gravel outlet 29 Sand Receiving chute

Claims (2)

(57) [Claims] 1. A horizontal draining drum 1 and a classification drum 2
Preparative, connected by interposing a short tube 8 on a platform, drained drum
In the twin turbine type trommel, which is concentrically and rotatably provided so that
The draining drum 1 is a donut-shaped side plate, and a water wheel type continuous pumping bucket 11 is provided on the inner surface of the drum, and the back of each pumping bucket has a downward slope in the direction of the classification drum.
The overflow receiving toy 12 is installed ,
Attach to the discharge port 13 provided on the side plate 5'on the classification drum side ,
An overflow hole 14 is formed in the side plate 5'adjacent to the discharge port 13, and the stock solution feeding side is provided in the draining drum.
A fixed chute 19 inclined downward from the opening of the side plate 5 in the direction of the classification drum is provided and supported by a fixed chute support rod 20 from the outside of the drum .
The clew frame body 17 is wound with a wire mesh, and is placed in a fixed semi-circular tank 15 in a water-immersed state. A circular truncated cone 9 of a perforated plate is fixed to the other end of the cylindrical trommel, and the tip thereof is supported by a support rod 10. Then, a sand feeding screw blade 18 is arranged on the outer periphery of the screw frame 17. A double-turbine type trommel having the above-mentioned configuration. 2. The sand feeding screw blades 18 provided on the outer periphery of the screw frame 17 are formed into two independent parts,
It is formed by sandwiching a plurality of stop rods, and driven claws formed on both edges of the screw frame 17 are engaged with the driving claws formed on both edge portions of the cylindrical frame body to roll. Double water turbine type trommel, which is characterized by being movable.