JP2003088742A - Continuous kneader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a continuous kneader capable of stably and continuously kneading. SOLUTION: This continuous kneader 10 is equipped with a casing 34 in the shape of a conical cylinder of which at least the downstream-side section converges toward the downstream side, a fluid supply means 36 which continuously supplies a fluid in a state of flowing in the peripheral direction of the casing 34 from its upstream side, a powder supply means 38 which continuously supplies a powder at least containing a solidifying agent from the upstream side of the casing toward the inside axis of the casing, and a discharge port which can discharge a kneaded material comprising the fluid supplied by the fluid supply means and the powder supplied by the powder supply means and is formed at the downstream-side end 34C of the casing 34.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous kneading device for continuously kneading a fluid and a powder containing at least a solidifying material.

[0002]

2. Description of the Related Art Conventionally, there has been a continuous kneading apparatus for kneading water, an aggregate, a solidifying material and other kneading materials when continuously producing mortar, concrete and the like in construction and civil engineering sites. A conventional continuous kneading device includes, for example, a casing and a kneading shaft that is provided in the casing and has kneading blades, and continuously mix kneading materials such as water, a solidifying material, and an aggregate from the upstream side of the casing. It is configured to knead these kneading materials while rotating the kneading shaft and moving it downstream by the kneading blades.

[0003]

However, in such a concrete continuous kneading apparatus, since the kneading blades rotate on the same plane, the kneading material adheres to the kneading blades, the kneading shaft and the inner wall of the casing to grow. As a result, the driving means is stopped due to blockage in the casing or overload, and stable continuous kneading cannot be performed.

Further, in the continuous kneading device, since it is necessary to knead the kneading material while continuously moving it, when the kneading material has high viscosity, the driving means for rotating the kneading shaft is overloaded. However, there is a problem that stable continuous kneading cannot be performed.

Therefore, it is an object of the present invention to provide a continuous kneading apparatus capable of performing stable continuous kneading.

[0006]

In order to achieve the above object, the present invention provides a casing having a conical tubular shape in which at least the downstream side converges in the downstream direction, and the casing from the upstream side to the circumferential direction thereof. A fluid supply means for continuously supplying a fluid in a flowing state; a powder supply means for continuously supplying powder containing at least a solidifying material in the downstream direction from the upstream side of the casing; and the fluid supply means. And a discharge port formed at the downstream end of the casing, capable of discharging a kneading material composed of the fluid supplied by the powder and the powder supplied by the powder supply means. It is preferable that the downstream side of the casing is installed facing downward, particularly vertically downward.

When the continuous kneading apparatus according to the present invention is installed so that the downstream side thereof faces downward, the fluid supplied into the casing flows in the circumferential direction of the casing, so that the casing is discharged. It flows to the outlet while forming a vortex along the inner peripheral surface of the casing. That is, in the slurry supplied into the casing, a downward vector consisting of its own weight and a vector acting in the circumferential direction of the casing are combined to form a spiral vector, so that the inner peripheral surface of the casing is formed. It flows toward the outlet while forming a vortex along it. Then, the powder supplied from the upstream side of the casing in the axial direction is added to the fluid flowing while forming a vortex, so that the powder does not stay or float as floating, The kneading material composed of the fluid and the powder can be uniformly and sufficiently mixed.

As described above, the continuous kneading apparatus according to the present invention is
Since no kneading blade or driving means is used, stable continuous kneading can be performed without impairing stability due to overload. Further, since the casing of the continuous kneading apparatus according to the present invention is formed in a tubular shape and is not provided with a kneading blade or a kneading shaft, cleaning or the like can be easily performed.

In the continuous kneading apparatus according to the present invention, it is preferable that a suction means for continuously sucking the kneading material is connected to the discharge port. By connecting the discharge port to the suction means in this way, even a highly viscous fluid can be stably guided toward the discharge port and made to flow in a spiral shape.

Further, in the continuous kneading apparatus according to the present invention, the fluid supply means includes a fluid guide portion for guiding the supplied fluid into the casing, and the fluid guide portion has a peripheral portion near an upper end of the casing. It is preferable that it is provided along the surface and communicates with the inside of the casing so that the supplied fluid flows along the inner peripheral surface of the casing.

Further, in the continuous mixing apparatus according to the present invention, the fluid includes water, muddy water, etc. In particular, by utilizing bentonite waste liquid, industrial waste which is difficult to process can be effectively reused. This makes it possible to reduce the cost of waste liquid treatment and disposal. Further, in the continuous kneading apparatus according to the present invention, the powder may contain an aggregate and the like in addition to the solidifying material.

[0012]

Embodiments of the continuous kneading apparatus according to the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram of a continuous kneading system including a continuous kneading device 10 according to this embodiment.

The continuous kneading system comprises a continuous kneading device 10
And, for example, a demolition device 12 for removing gravel or the like having a predetermined particle size or more as a residue from a mixed fluid including generated soil and bentonite waste liquid, and a specific gravity of the slurry from which the residue has been removed by the demolition device 12 are adjusted. Slurry tank 14
And a solidifying material supplying device 16 for feeding the solidifying material to the continuous kneading device 10, and a mixing chute 18 for feeding the kneading material kneaded by the continuous kneading device 10 and further kneading the kneading material.

A hopper 20 is provided in the disintegrator 12, and the generated soil, bentonite waste liquid, and the like are supplied from the hopper 20 into the disintegrator 12. The disintegrator 12 is equipped with a sieve having a predetermined mesh size, and the mixed fluid composed of the generated soil and bentonite waste liquid, which has been introduced, is mixed with the residue and slurry such as gravel having a predetermined particle size or more by the sieve. And the slurry is supplied to the slurry tank 14 and the residue is discharged.

The slurry tank 14 includes the slurry supply pipe 2
2 and the slurry kneading device 1 through the slurry supply pump 24
It is connected to 0. Further, the slurry tank 14 includes a pycnometer for measuring the specific gravity of the slurry in the slurry tank 14, and a specific gravity adjuster for adjusting the specific gravity of the slurry in the slurry tank 14 based on the value measured by the pycnometer. In order to continuously supply the slurry in the slurry tank 14 to the continuous mixing device 10, the specific gravity is always adjusted to a predetermined specific gravity. The slurry whose specific gravity is adjusted is configured to be supplied to the continuous kneading device 10 through the slurry supply pipe 22 by the operation of the slurry supply pump 24.

The solidifying material supplying device 16 continuously supplies a fixed amount of solidifying material among the solidifying material silo 26 holding the solidifying material and the solidifying material in the solidifying material silo 26 to the continuous kneading device 10. And a solidifying material measuring device 28. The solidifying material metering device 28 is configured to supply the solidifying material to the continuous kneading device 10 while adjusting the amount of the solidifying material according to the specific gravity and amount of the slurry supplied to the continuous kneading device 10.

The mixing chute 18 is connected to the continuous kneading device 10 via a kneading material discharge pipe 30 and a kneading material discharge pump 32, and the kneading material kneaded by the continuous kneading device 10 is supplied to the kneading material discharge pump 32. It is configured to be discharged from the continuous kneading device 10 by the operation and supplied to the mixing chute 18 via the kneading material discharge pipe 30. The kneading material discharge pump 32 adjusts the amount of the kneading material discharged according to the amount of the slurry continuously supplied to the continuous kneading device 10 and the amount of the solidifying material,
For example, it is configured so that the same amount of the supplied slurry and the solidifying material are discharged and the operation is performed. The mixing chute 18 divides the entrance part into two parts in the vertical direction,
A plurality of chutes for discharging the halved kneading materials in a laterally divided state are connected, and the kneading materials can be further kneaded only by passing the kneading materials through the mixing chute 18. Yes (Japanese Patent Application Laid-Open No. 2
001-54908).

The continuous kneading device 10 is, as shown in FIG.
A casing 34 which is formed in a conical cylinder shape in which at least the downstream side converges in the downstream direction, and a slurry guide portion which guides the slurry supplied from the slurry tank 14 through the slurry supply pipe 22 and the slurry supply pump 24 into the casing 34. 36, and a solidified material guide portion 38 for guiding the solidified material supplied from the solidified material supply device 16 into the casing 34.

The upstream side 34A of the casing 34 is formed in a cylindrical shape, and the downstream side 34B is formed in a conical cylindrical shape that converges in the downstream direction. The lower end 34C of the downstream portion 34B of the casing formed in a conical cylinder shape is connected to the kneading material discharge pipe 30.

As shown in FIGS. 2 and 3, the slurry guide portion 36 is provided along the outer peripheral surface near the upper end of the upstream side 30A of the cylindrical casing 34. The base end side of the slurry guide portion 36 is provided with the slurry supply pipe 2
2, and the inside of the tip is opened toward the inside of the casing 34. Therefore, since the slurry guide portion 36 is provided along the outer peripheral surface near the upper end of the upstream side 30A of the cylindrical casing 34, it is supplied through the slurry supply pipe 22 by the operation of the slurry supply pump 24. The slurry thus produced is supplied into the casing 34 while flowing in the circumferential direction of the casing 34. Then, the downstream side 34B of the casing 34
However, since it is formed in a conical shape and its lower end is connected to the kneading material discharge pump 32 through the kneading material discharge pipe 30, the slurry supplied in the circumferentially flowing state is stored in the casing 34. Casing 3 to the bottom
It flows while forming a vortex along the inner peripheral surface of 4. That is, the slurry supplied into the casing 34 has its own weight and a vertically downward vector composed of the suction force of the kneading material discharge pump 32 connected to the kneading material discharge pipe 30 and the circumferential direction of the casing 34. The working vector and the working vector are combined to form a vortex vector, so that the vortex flows along the inner peripheral surface of the casing 34 while forming a vortex.

The solidifying material guide portion 38 is provided in an open state on the upper surface of the upstream side 34A of the casing 34,
The solidified material supplied from the solidified material supply device 16 is supplied into the casing 34 in a state of flowing in the axial direction of the casing 34, that is, in the vertical direction by its own weight and suction of the kneading material discharge pump 32, forming a vortex. It is adapted to be added to a flowing slurry.

Next, the operation of the continuous kneading apparatus 10 according to this embodiment will be described. First, the generated soil and bentonite waste liquid are put into the demolition apparatus 12 through the hopper 20, and the demolition apparatus 12 removes residue such as gravel having a predetermined particle size or more, and the slurry from which the residue is removed is a slurry. It is supplied to the tank 14. The slurry supplied to the slurry tank 14 is adjusted to a specific gravity by a specific gravity meter and a specific gravity adjuster, and is continuously supplied to the continuous kneading device 10 via the slurry supply pipe 22 by the operation of the slurry supply pump 24.

On the other hand, the solidifying material supplying device 16 continuously supplies a predetermined amount of solidifying material out of the solidifying material held in the solidifying material silo 26 to the continuous kneading device 10 by the solidifying material measuring device 28.

The slurry supplied to the continuous kneading apparatus 10 through the slurry supply pipe 22 is the slurry guide section 3
It is guided via 6 into the casing 34. At this time, since the mixed material discharge pump 32 is operating, the slurry flows in the downstream direction of the casing 34 while forming a vortex along the inner peripheral surface of the casing 34 as described above. At the same time, since the solidifying material is supplied into the casing 34 by the solidifying material supply device 16, the solidifying material is added to the slurry which is flowing in a spiral shape. At this time, since the slurry flows in a spiral shape, the solidifying material and the slurry are discharged while being kneaded.

[0025]

As described above, since the continuous kneading apparatus according to the present invention is not provided with the kneading blade and the driving means for driving the same, stable kneading can be performed.

[Brief description of drawings]

FIG. 1 is a schematic view of a continuous kneading system including an embodiment of a continuous kneading device according to the present invention.

FIG. 2 is a front sectional view of a continuous kneading device according to this example.

3 is a sectional view taken along line II-II of FIG.

[Explanation of symbols]

10 Continuous kneading equipment 34 casing 34C Downstream end of casing 36 Slurry guide section 38 Solidified material guide part

Claims (4)

[Claims] 1. A casing having at least a downstream side formed into a conical cylinder shape that converges in a downstream direction, and a fluid supply means for continuously supplying a fluid in a state of flowing in the circumferential direction from the upstream side of the casing. Powder supply means for continuously supplying powder containing at least a solidifying material from the upstream side to the downstream side of the casing, the fluid supplied by the fluid supply means, and the powder supplied by the powder supply means. A continuous kneading device comprising a body and a discharge port formed at an end portion on the downstream side of the casing, capable of discharging a kneading material. 2. The continuous kneading apparatus according to claim 1, wherein suction means for continuously sucking the kneading material is connected to the discharge port. 3. The fluid supply means includes a fluid guide portion for guiding the supplied fluid into the casing, the fluid guide portion being provided along a peripheral surface near an upper end of the casing, The continuous kneading device according to claim 1 or 2, which is communicated with the inside of the casing so that the supplied fluid flows along the inner peripheral surface of the casing. 4. The continuous kneading apparatus according to claim 1, wherein the fluid contains bentonite waste liquid.