JPH0655097A - Twin water wheel type trommel - Google Patents

Abstract

PURPOSE:To provide the device with which the complete recovery of fine sand, the sufficient washing of aggregate and equipment management are easy as the device for washing and draining cement sludge water and recovering the aggregate contained in the return concrete, etc. CONSTITUTION:This trommel consists of a draining drum 1 and a classifying drum 2. While sludge is ladled up like a water wheel by radial buckets, the sludge is subjected to draining of water in the draining drum 1. The sludge flowing excessively therein is released by an overflow draining hole 14. The classifying drum 2 is disposed into a fixed circular tank 15 in the state of immersing the drum in water. The drum is constituted freely and integrally rotatably with the draining drum. Sand feed screw vanes 18 provided on the outer periphery of the drum are bisected and are constructed independently from the frame body of the classifying drum.

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]

2. Description of the Related Art As a conventional method for collecting aggregates, (A) scooping sand with a screw conveyor from a sand squeezing sludge tank after classifying coarse aggregate with a rotating cylindrical wire net, or (B) Inside the fixed horizontal semi-cylindrical tank, there is provided a classification drum in which screws are wound on both inner and outer surfaces of a concentric cylindrical wire net having a diameter slightly smaller than the cylinder, 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, and then the outside of the tank. Or an aggregate collecting device in which (C) 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 aggregate collecting trommel in which the classifying drum 2 and the classifying drum 2 are concentrically connected to each other via the short tube 8 on one stand, 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 having a gradient in the downstream direction is provided on the back surface of each pumping bucket, and the overflow receiving toy 12 is attached to the discharge port 13 of the downstream side plate, and an overflow hole 14 is formed adjacent to the discharge port. The end portion 23 of the overflow receiving toy in the sludge charging direction is missing. A fixed chute 19 inclined in the direction of the classification drum from the charging port is provided in the draining drum, and is held by a fixed chute support rod 20 from the outside of the drum.

In the classification drum 2, a trommel 6 in which a cylindrical frame body is wound with a wire mesh or the like is placed in a fixed semi-circular water tank 15 in a submerged state. The end of the classification drum is a circular truncated cone 9
Are fixed, and the tip thereof is axially supported by the support ring 10. On the outer periphery of the classifying drum, independent two-divided external feed screw-shaped blades 18 are formed by sandwiching a plurality of stop rods to form a screw frame body 17, which is formed on the edges of the classifying drum. The claws (not shown) and driven claws (not shown) formed on both end edges of the screw frame 17 are provided so as to be rotatable.

[0010]

In the first aspect of the present invention, the aggregate is forcibly pumped up in the draining drum by the water wheel-shaped pumping bucket in a fixed amount, so that the sedimentation action occurs in each pumping bucket and the fine sand is reliably collected. In addition, the sludge thrown in through the inlet serves to prevent the sludge from flowing directly into the toy due to the lack of the overflow toy's inlet direction. Secondly, since it is a pumping type with a continuous bucket, it is possible to constantly supply a fixed amount, so that there is no difficulty in the trommel. Thirdly, since the drained aggregate is put into the classification drum, it is sufficient to use makeup water in the submerged aquarium. Fourthly, even if a large amount of sludge flows into the draining drum from the outside, the overflow holes cause a certain amount of water to be discharged to the outside of the tank, which does not hinder the recovery efficiency. Fifth, since the sand feeding screw outside the classification drum is independent of the classification drum body and is divided into two parts, and the trommel tank is a semi-circular fixed tank, the upper half can be opened and wire mesh etc. There is an effect that work such as clogging removal and replacement 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 mounted in a ring and rotatable by a drive motor.

Both side plates 5 and 5'of the draining drum are donut-shaped. A trommel 6 having the same axis is provided on the downstream side of the draining drum and connected by a short pipe 8.

The other end of the trommel is fixed with a circular truncated cone 9 and the other end is pivotally supported by a support ring 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. Further, the overflow holes 1 are provided between the adjacent outlets, respectively.
4 is provided.

A semicircular water tank 15 is provided so as to be in sliding contact with the lateral feed blades on the outer circumference of the trommel. On the inner surface of the trommel and the truncated cone 9, there are provided feed vanes 22 for feeding in the exit direction.

Sand feeding screw blades, scraping blades 16
It is arranged so that it can be fed laterally, and is independent of the trommel and is divided into two parts.

A fixed chute 19 that slides into the trommel when the aggregate lifted by the lifting bucket falls due to gravity is provided in the draining tank, and is held by the 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, the fine sand can be completely recovered. Secondly, it is possible to collect aggregates that can be used immediately with reliable water washing. 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]

FIG. 1 Front internal structure diagram

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 Trommel 8 Short Tube 9 Frustum 10 Support Ring 11 Pumping 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 Feeding blade 23 Missing part

Claims (2)

[Claims] 1. A trommel for collecting aggregates, wherein a horizontal draining drum and a classifying drum are connected on a single frame with a short pipe interposed therebetween, and are concentrically rotatably provided, the draining drum is a donut. As a side plate, a water turbine type continuous pumping bucket is provided on the inner surface of the drum. An overflow-type toy with a gradient in the downstream direction is provided on the back surface of each pumping bucket, and is attached to the drain port of the side plate on the downstream side. An overflow hole is drilled adjacent to the drain port. A fixed chute inclined from the charging port toward the classification drum is provided in the draining drum, and is supported by a fixed chute support rod from the outside of the drum. In the classification drum, a cylindrical frame body is wound with a wire mesh or the like, and is placed in a fixed semicircular tank in a water-filled state. A truncated cone of a perforated plate is fixed to the other end of the classification drum, and the tip end thereof is axially supported by a support ring. Screw-shaped blades are arranged on the outer circumference of the classification drum. A double-turbine type trommel having the above-mentioned configuration. 2. A screw-shaped blade provided on the outer periphery of the classifying drum is formed into two independent parts, which are formed by sandwiching a plurality of stop rods, and are formed on both end edges of the classifying drum. A double-water turbine type trommel in which driven claws formed on both edges of the screw frame are engaged with the claws and are freely rotatable.