JPH0461924A - Mixer for mixing lumpy substances marked in specific gravity difference - Google Patents

Abstract

PURPOSE:To efficiently mix lightweight stable soils to be treated by providing the outer and inner spiral strip blades fixed to a common shafts in a container and cutting the outer and inner spiral strip blades in the vicinity of the central parts thereof to respectively form the right and left parts of the spiral strip blades in specific directions. CONSTITUTION:Outer and inner spiral strip blades 17, 17', 18, 18' fixed to a common rotary shaft 13 are provided in a container 11 having a supply port and a discharge port provided to its upper and lower parts at the central part thereof and respectively cut in the vicinity of the central parts thereof so that the left and right parts 17, 17' of the outer spiral strip blades have reverse spiral directions and the left and right parts 18, 18' of the inner spiral strip blades are reverse in direction and have spiral directions reverse to those of the left and right parts 17, 17' of the outer spiral strip blades. As a result, lightweight stable soils to be treated {e.g. materials different in specific gravity by about 100 times (soil and other foamed styrol)} hard to mix can uniformly be mixed in large quantities without using a grinding pretreatment apparatus.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mixer for mixing lumpy materials with significant differences in specific gravity, and in particular to a mixer for mixing lightweight stabilized soil (Stabiliz
The present invention relates to a mixer that rapidly mixes civil engineering materials such as ed Light 5 oil (hereinafter referred to as SLS) in large amounts without using a crushing device.

SLS has a true specific gravity of 2, 3-2, 8 gf/c
m3 bulk specific gravity 1, 3~1, 9 g f/c
m' of soil, coal ash, garbage incineration ash, slag, etc., are mixed with extremely light particles (1 to 30 mm in diameter) such as foamed polystyrene with a bulk specific gravity of 0.01 to 0.03 gf/cm3 to reduce the weight of cement, A civil engineering material made by adding a small amount of lime etc. to adjust its strength.It is used as embankment material on soft ground, roadbed material, soil freezing prevention material, excavation backfilling material, liquefaction countermeasure material,
Used as backfill material behind structures, etc. Since the lightness, shear, and compressive strength of SLS can be adjusted by mixing, it is possible to satisfy the lightness and strength required in the design depending on the properties of the raw material soil, etc., and it can be used extremely effectively in civil engineering. It is a material, and if various waste materials are used, it can also be an environmental measure. However, the time and amount needed for civil engineering work to handle materials with specific gravity that differs by a factor of 100 (10 times per day)
Although it is extremely difficult to produce a homogeneous mixture that satisfies the requirements of 0 to 500 m''), this could be achieved for the first time using the simple batch mixer with special mixing blades of the present invention.

[Prior Art] Conventionally, stirring devices have been used to stir and mix fluids such as high viscosity liquids or slurry substances to obtain a uniform product.
For example, the invention disclosed in Japanese Unexamined Patent Publication No. 2-40228 has been disclosed. The invention includes outer and inner helical band blades fixed to a common rotation axis and having opposite helical directions within a container having an inlet and an outlet.

[Problems to be Solved by the Invention] In the above-mentioned conventional stirring device, it is possible to uniformly stir and mix fluids when processing fluids, but as in the present invention, it is possible to uniformly stir and mix fluids. It is almost impossible to crush and crush a lumpy material such as slag while mixing it evenly and in large quantities with particles such as styrofoam, which is 100 times lighter.

The object of the present invention is to provide a mixer with a simple structure that can evenly mix these hard-to-collapse SLS materials in a large amount without using a crushing or crushing pretreatment device.

C Means for Solving the Problem j The mixer for mixing lumpy substances with a significant difference in specific gravity according to the present invention has the following configuration as a means for achieving the above object.

(1) In a container that has a supply port and a takeout port above and below the center,
Outer and inner helical band blades are fixed to a common rotation axis, and each of the outer and inner helical band blades is cut near the center, and the outer helical band blade left valve and the outer helical band blade cloth are respectively cut. have a helical direction opposite to the left part of the inner spiral band blade and the inner spiral band blade cloth part, and have a helical direction opposite to the left and right parts of the respective outer spiral band blades6. (2) In the container, the outer spiral band blade left part and right part transfer the contents from the left and right ends toward the center, and the inner spiral band blade left part and right part transfer the contents in the opposite direction. The rotational direction of the rotating shaft and the spiral direction of each spiral band blade are defined so that the object is transferred from the center toward the left and right ends.

(3) A double-lining waveform blade or intermittent protrusions such as a hammer are provided on the outer periphery of the outer spiral band blade so that it can be used without special crushing or crushing pretreatment equipment. thing.

(4) The container and rotating shaft are each installed with some play.

(5) An appropriate number of holes are provided in the outer spiral band blade.

[Function] The mixer configured as described above can have a production capacity corresponding to civil engineering work due to the mutual relationship between capacity and cycle time.
．． 0m3. It is a shaft-rotating mixer with a cycle time of 2 to 4 minutes (varies slightly depending on the properties of the raw material soil, etc.). The mixing blades are provided symmetrically on the outside and inside, and the number of revolutions is 10 to 30 times/min. (The number of rotations varies somewhat depending on the quality of the raw material soil, and should be selected appropriately.) The above-mentioned cycle time consists of the measuring, premixing, main mixing, and discharge times of the raw materials.

Premixing involves evenly mixing a lightweight material such as 1-foamed polystyrene with lime or cement through a small amount of water.

Main mixing is to further add raw materials such as soil and mix evenly.

The mixing mixer of the present invention is provided with a special single-shaft double rotary blade as described below, and performs the following four functions simultaneously.

(1) Pulverize the raw material, such as soil. Pulverizes compacted soil, highly viscous clumps like clay, and clumps obtained by dewatering and pressing various types of sludge into fine particles.
Huggs. It is the primary function between the folds carved on the outside of the outer rotating band and the outer skin of the mixer vessel. It acts like a saw between the folds and the outer panel.

In addition, these folds are useful when a lump of debris such as concrete or concrete that is difficult to crush gets mixed in, so that it can slip between the folds with a slight movement to prevent it from getting wedged between the wing and the outer panel and causing damage. ing. For this reason, the folds are made of ultra-hard material.

(2) Forcibly move the soil lower at the left and right ends of the mixer container upwards in the center. To this end, the outer spiral band blades create this movement in both the rotational and rotational directions.

(3) Materials gathered above the center of the mixer container by the outer spiral band blades are forcibly moved toward the left and right ends by the inner spiral band blades. The pitches of the spirals of the outer and inner wings are set to equalize their respective feed amounts.

Due to both of the above-mentioned movements (2) and (3), the contents repeat the outward-inward movement and the downward-upward movement with some help from gravity at various locations. Left and right swapping is done by wrapping the outer and inner wings in the center.

This movement occurs regardless of the specific gravity of the material.

(4) To prevent uneven movement, the outer wings are perforated to create a difference in speed of movement and create shear within the material, enhancing the mixing effect.

In the mixing mixer of the present invention, the rotation speed is adjusted for the following purpose.

(1) Uniform the torque generated during loosening, crushing, and mixing of raw materials. If the torque is small, it will be faster; if the torque is large, it will be slower.

(2) Torque generation differs depending on the mixing ratio of heavy material and light material 4. Adjust the rotation accordingly.

The reason why the outer spiral band blade moves inward (toward the center) is that the discharge port for the mixture is provided at one location below the center, so that it also has the function of collecting the mixture there.

[Embodiment] An embodiment will be described with reference to the drawings. Fig. 1 shows the overall layout of an example of a lightweight soil plant having a mixing mixer of the present invention, in which 1 is a mixer 2 is a mixer power board, 3 is a light soil plant having a mixing mixer according to the present invention.
is a sediment measuring tank, 4 is a cement measuring tank, 5 is a water measuring tank, 6 is a
are bins for E, P, and S grains (styrofoam grains); 7 is also a capacity measuring tank; 8 is a belt conveyor for transporting earth and sand; 9
is the operation panel, and lO is the cement silo.

Figure 2 shows an example of a timetable showing the work of the lightweight soil plant in Figure 1, in which the measurement of EPS, cement, and water takes 4 minutes to 220 seconds, and the discharge mixing takes 80 seconds.
Add and mix the weighed earth and sand for 0 seconds to 220 seconds.16
The discharge will be completed in 0 seconds and the next batch will be accepted.

FIG. 3 is a partially cutaway plan view, a front view, and a partially cutaway side view showing an example of the mixing mixer of the present invention. 11 in the diagram
is a container, which, although not shown, has a supply port above the center and a discharge port also below.

The container 11 is only placed on four support frames 12 and has a degree of freedom. Inside the container 11 there is a rotating shaft 13, supported by bearings 14 (fixed) and connected to a reducer 15 (suspended and with a considerable degree of freedom). The speed reducer 15 is driven by a belt from a motor 16. The rotating shaft 13 has a large-diameter outer spiral band blade left portion 17 and a right portion 1.
7' is fixed by a support piece (not shown). The left portion 17 and the right portion 17' face each other leaving a lap portion in the center, and have opposite spiral directions. Further, a left portion 18 and a right portion 18' of a small-diameter inner helical band blade are fixed to the rotating shaft 13 by support pieces (not shown).

The left portion 18 and the right portion 18' face each other leaving a lapped portion in the center, and have opposite helical directions6.The left portion 17 and the left portion 18, and the right portion 17' and the right portion I8 also have opposite helical directions. It has a helical direction of During operation, the contents are transferred from both ends of the container 3 toward the center by the outer spiral band blades 17, 17', and the contents are transferred from the center to both ends of the container by the inner spiral band blades. As shown in FIG.
, 18.18' spiral direction is specified to increase the mixing effect. 9 is a hole provided in the outer helical band blade 17, 17', by means of which it is possible to adjust the transport speed of the contents, to produce a burrowing effect, and to further increase the mixing effect.

FIG. 4 is a front view and a perspective view showing an example of the outer helical band blade 17, 17', in this case a double-lined inner and outer wing.
The blades 17a, 17a each have a corrugated outer circumference, and are used to loosen viscous and lumpy soil using the rotating saw-like blades. 19 is the hole mentioned above.

FIG. 5 is a front view and a perspective view showing another example of the outer spiral band blade 17, 17'. Demonstrates ability for crushing.

[Effects of the invention 1 The effects achieved by the present invention are as follows.

(1) Lightweight and stable processing Materials (±others and Styrofoam, etc.) that differ in specific gravity by a factor of OO can be processed in a time and amount suitable for civil engineering work (100 to
500m3).

(2) No preliminary equipment for crushing or crushing is required.

[Brief explanation of drawings]

Figure 1 is an overall layout diagram showing one example of a Beniokido plant, Figure 2
The figure shows an example of a time table, FIG. 3 is a partially cutaway plan view, front view and partially cutaway side view showing an example of the mixing mixer of the present invention, and FIGS. 4.5 and 4.5 respectively show the outer spiral band of the present invention. They are a front view and a perspective view showing one example of a wing. 1 Mixer 3, earth and sand measuring tank 5: water measuring tank 7: E, P, S grains 8: capacity measuring tank of belt conveyor for transporting earth and sand 9: operation panel 11: container 13: rotating shaft 15, reducer 17.17 '18.18' 19, Hole 17b: Hammer mixer power panel 4゜Cement measuring tank 6・E, P, S grain bin 1O: Cement silo 12・Support frame 14: Bearing 16: Motor: Outer spiral band blade: Inside Spiral band blade 17a Waveform outer periphery blade centroid 50 m m - Dub 1 Rano procedure amendment January 31, 1991

Claims (1)

[Claims] 1. Outer and inner spiral band blades fixed to a common rotating shaft are provided in a container having a supply port and a take-out port above and below the central portion, and the outer and inner spiral band blades are They are each cut near the center, and the left part of the outer spiral band blade and the right part of the outer spiral band blade have opposite helical directions, and the left part of the inner spiral band blade and the right part of the inner spiral band blade have opposite spiral directions. 1. A mixer for mixing bulk materials having a significant difference in specific gravity, characterized in that the spiral direction is opposite to the left and right portions of the respective outer spiral band blades. 2. In the container, the left and right portions of the outer spiral band blades transfer the contents from the left and right ends toward the center;
The rotational direction of the rotating shaft and the helical direction of each spiral band blade are defined so that the contents are transferred from the center toward the left and right ends, contrary to the left and right parts of the inner spiral band blade. The mixer for mixing bulk materials with significant differences in specific gravity according to claim 1. 3. The outer circumference of the outer spiral band blade is provided with intermittent protruding pieces (folds) such as a double lining waveform blade or a hammer so that it can be used without special crushing or crushing pretreatment equipment. The mixer for mixing lumpy substances having a significant difference in specific gravity according to claim 1 or 2. 4. The mixer for mixing lumpy substances with significant differences in specific gravity according to claims 1 to 3, wherein the container and the rotating shaft are each attached with some play. 5. The mixer for mixing bulk materials having a significant difference in specific gravity according to claims 1 to 4, wherein the outer spiral band blade is provided with an appropriate number of holes.