JP3631939B2 - Kneading granulator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a kneading and granulating apparatus for granulating and forming raw materials such as clay agglomerates into small agglomerates, or granulating and forming into a small agglomerated particles by mixing a coagulant such as cement with the raw materials. In addition, when cement is mixed into a clay lump to form a small lump granule, it is used for embedding in the sea, for increasing various volumes, or for a concrete aggregate.
[0002]
[Prior art]
Since raw materials such as clay waste and building waste from the ceramic industry cannot be used as they are for landfill or concrete aggregate on the coast, it is necessary to solidify those raw materials with cement or coagulant. A twin-screw kneader was used that granulated and formed into small agglomerates while kneading the raw material and the coagulant by rotating a number of blades facing each other and rotating a number of blades attached to the rotation shaft. .
Moreover, the biaxial kneader was used also when the clay board shape | molded with the filter press was granulated to a small granule.
[0003]
According to this, small agglomerates are rapidly granulated and formed, but the soft material to be kneaded adheres to the rotating shaft of the blade and solidifies, and when this solid body grows, the blade collides with this. The weight increases due to wear, damage, and adhesion of solid bodies, causing a load on the drive source of the rotating shaft.
As a result, the impregnation of the coagulant and the raw material by the blades and the cutting function of the mixture are hindered, and the granulated particles are non-uniform in size and the mixing of the coagulant and the raw material is also inhomogeneous and high quality lump. It has the problem that a granule cannot be obtained.
In addition, if the solid material adhered and solidified on the rotating shaft as described above is allowed to stand and the kneading and granulating apparatus is operated, the growth of the solid material is promoted. Therefore, this solid material must be removed frequently. This work takes time and effort, is troublesome, and the operation of the kneader must be stopped each time the work is performed, resulting in poor production efficiency of the agglomerates.
[0004]
[Problems to be solved by the invention]
Accordingly, the present invention prevents blade breakage and the like by preventing the material to be kneaded from adhering to the rotating shaft and solidifying and growing, and reduces the load on the driving source of the rotating shaft, and is uniform with uniform particle size. The object is to obtain agglomerates.
[0005]
[Means for Solving the Problems]
In view of the above-mentioned problems, the present invention provides a multi-shaft kneading and granulating apparatus in which each blade is disposed between the front and rear of the blade of the other rotation shaft between the rotation shafts, and the tips of the blades are mutually connected. Are attached to each rotary shaft so as to be close to the other rotary shaft side, and an elastic material is provided around the rotary shaft, so that a solid body adhered and solidified on the outer peripheral surface (elastic material) of the rotary shaft grows. When the blade of the other rotating shaft comes into contact with the solid body, the elastic material to which the solid body adheres is elastically deformed, and the solid body is peeled off from the rotating shaft by this deformation, thereby solving the above problem.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described below with reference to the drawings.
1 to 4, reference numeral 1 denotes a fixing machine body of a kneading granulator according to the present invention, and a kneading tank housing part 2 having a concave cross section having a predetermined volume is provided at the front part of the fixing machine body 1. At the same time, a drive unit base 3 is provided at the rear of the kneading tank storage unit 2.
In the present embodiment, the kneading tank storage unit 2 is shown as having an upper opening, but actually, the opening is covered with a canopy (not shown).
[0007]
A kneading tank 4 made of plastic rubber, synthetic rubber or the like having flexibility and elasticity is accommodated in the inner periphery of the kneading tank accommodating portion 2.
The kneading tank 4 has peripheral walls (front and rear left and right side walls) 5, 5 a... And a bottom portion 6, and as shown in FIG. 2, a metal plate having an outward flange 7 projecting from the upper ends of the left and right side walls 5 and 5 a. It is fixed to the auxiliary 8.
The flange 7 is vertically opposed to the flange 9 projecting outward from the upper ends of the left and right side walls 2a, 2b of the kneading tank housing portion 2.
[0008]
A plurality of bearing brackets 10 are fixed to the lower portion of the flange 7 of the kneading tank 4 to support the rollers 11 in a rotatable manner, and roll on the upper end flange 9 of the kneading tank housing portion 2. ing.
Thereby, the kneading tank 4 is supported so as to be movable in the front-rear direction along the upper end flange 9 of the kneading tank accommodating portion 2.
Further, as shown in FIG. 2, the center portion of the bottom portion 6 in the lateral direction is a slightly middle-high portion 12, and the left and right sides of the bottom portion 6 are curved in an arc shape.
A plurality of rollers 13 are provided on the back surface of the middle-high portion 12 in the longitudinal direction (depth in FIG. 2), and a substantially triangular mountain cross section is formed at the central portion of the kneading tank housing portion 2 so as to correspond to the rollers 13. A protruding band rail 14 is projected, and a roller 13 is rolled on the top of the protruding band rail 14.
On the base 3, a hydraulic cylinder 15 for moving the kneading tank 4 back and forth is installed, and the tip of the cylinder rod 15a is fixed to a base 16 standing upright on the upper end of the rear wall 5d of the kneading tank 4. The kneading tank 4 is moved forward and backward by driving the hydraulic cylinder 15.
[0009]
In addition, a discharge hole 17 is provided in front of the bottom 6 of the kneading tank 4, and a discharge chute 18 communicating with the discharge hole 17 is installed at the lower portion of the front wall 2 c of the kneading tank storage unit 2.
Further, a supply chute 19 is installed at the rear upper part of the kneading tank 4, and a conveying conveyor 20 for the clay filter cake W and a supply hopper 20 a for the cement C are provided above the supply chute 19.
[0010]
In the kneading tank 4, an impeller 22 provided with a plurality of blades 21 having cutting edges 21a and an impeller 24 provided with a plurality of bent blades 23 having an arcuate curved surface 23a are rotatably provided. Yes.
The impellers 22 and 24 are alternately attached to a pair of machine shafts 25 and 26 arranged in parallel to the left and right in the kneading tank 4.
Further, the machine shafts 25 and 26 are configured to pass through the front and rear walls 5c and 5d of the kneading tank 4 and extend over the front and rear of the kneading tank housing part 2, and the rear ends of the machine shafts 25 and 26 are arranged in the kneading tank housing part 2. The rear wall 2d is penetrated to protrude onto the base 3, and the gears 27 and 28 that are pivotally attached to the respective axles 25 and 26 are engaged with the base 3, and one of the axles 25 is placed on the base 3. The drive shaft is connected to the installed geared motor 29.
Then, the gear 27 of one axle 25 is made larger in diameter than the gear 28 of the other axle 26 so that the rotation ratio is different, and the rotation of the other axle 26 is made faster.
The machine shafts 25 and 26 are rotatably supported by bearings 30 and 30a provided on the front end portion and the base 3 in the kneading tank housing portion 2, and the rotation ratios of the machine shafts 25 and 26 are set appropriately. doing.
The machine shafts 25 and 26 have their front portions slightly inclined downward, and the bottom portion 6 of the kneading tank 4 is also inclined so that the front portion is slightly inclined downward (see FIG. 3). .
In the present embodiment, the two axles 25 and 26 are shown. However, a multi-shaft in which three or more axles are juxtaposed in the left-right direction may be used.
[0011]
The impellers 22 and 24 are formed by radially projecting the blades 21 and 23 from the boss 31 provided at the center thereof, and the boss 31 is fitted and fixed to the axles 25 and 26.
The machine shafts 25 and 26 fitted with the bosses 31 are formed as rotation shafts 32 and 33, and the rotation shafts 32 and 33 are made of plastic rubber or synthetic rubber having flexibility and elasticity over the entire length direction. An elastic material 34 made of
When the solid body WC1 is pressed from the outside in a state where the solid body WC1 is adhered and solidified on the rotating shafts 32 and 33, the elastic material 34 is elastically deformed, and the elastic material 34 serving as a base to which the solid body WC1 is adhered is The solid body WC1 cannot cope with the elastic deformation and is set to have a sufficient thickness to peel off.
[0012]
As shown in FIG. 5, the blade 21 provided in the impeller 22 is curved in a bow shape toward the tip, and a cutting edge 21 a is provided on the bay side, and the tip 21 b is bent.
Further, as shown in FIG. 6, the blade 23 provided in the impeller 24 is formed such that a rectangular plate is curved in an arc shape and a curved surface 23a is directed outward.
Further, the clearance S between the inner peripheral surfaces 5, 5 a... 6 of the kneading tank 4 and the impellers 22, 24, that is, the tip 21 b of the blade 21 and the inner peripheral surfaces 5, 5 a. 24, the clearance S between the curved surface 23a of the blade 23 and the inner peripheral surfaces 5, 5a,...
[0013]
And in the blade | wing 21 of the impeller 22, the to-be-kneaded material (the filter cake W and the cement C) WC is mainly sheared with the cutting edge 21a, and the inner peripheral surfaces 5, 5a,. It is made to compress between.
The blades 23 of the impeller 24 are mainly configured to compress, roll and fold the material to be kneaded WC between the curved surface 23a and the inner peripheral surfaces 5, 5a,. .
As shown in FIGS. 1 and 4, the impellers 22 and 24 fixed to the left and right axles 25 and 26 are arranged in a state of being bitten between the left and right sides of the impellers 22 and 24, respectively. As shown, the tips of the blades 21 and 23 are close to each other on the side of the other rotating shafts 32 and 33.
[0014]
According to this embodiment, the clay filter cake W dehydrated and filtered by the filter press is conveyed by the conveyor 20 and dropped from the supply chute 19 to the rear end of the kneading tank 4, and at the same time, the cement C is supplied to the supply chute 19 by the supply hopper 20a. From the blades 21, 23 of the impellers 22, 24 driven by the motor 29, and between the blades 21, 23 and between the inner peripheral surfaces 5, 5 a, 6 of the kneading tank 4, Rolled, folded and kneaded while being compressed and gradually becomes a lump.
Further, the impellers 22 and 24 rotate to solidify while rolling between the blades 21 and 23 and the inner peripheral surfaces 5, 5a,. It falls from the discharge hole 17 at the inclined front end and is discharged from the discharge chute 18.
The obtained agglomerate W1 has such a size that the gap S between the blades 21 and 23 and the inner peripheral surfaces 5, 5a,.
[0015]
At this time, on the inner peripheral surfaces 5, 5a,... 6 of the kneading tank 4, the material WC to be kneaded adheres to the portions corresponding to the distance between the front and rear of the impellers 22 and 24, but the cylinder 15 is always fixed. Since the kneading tank 4 supported in the kneading tank accommodating portion 2 is reciprocated back and forth and moved relative to the machine shafts 25 and 26 in the axial direction, the inner peripheral surfaces 5, 5a,. , 6, before the material to be kneaded WC grows greatly, it is scraped off by the blades 21 and 23 which are moved back and forth relative to the kneading tank 4 or slides down due to the vibration of the kneading tank 4.
Further, since the kneading tank 4 is made of a material having flexibility and elasticity, the material to be kneaded WC is pressed against the inner peripheral surfaces 5, 5a,. Even after bending, after the blades 21, 23 are separated from the material to be kneaded WC, the inner peripheral surfaces 5, 5a,... 6 are scattered from the inner peripheral surfaces 5, 5a,. Fly away.
In addition, the advancing / retreating distance of the kneading tank 4 may be at least half of the distance between the front and rear impellers 22 and 24, and normally it may be moved by 10-15 cm.
Further, it is desirable that the kneading tank 4 is always moved back and forth, but it may be moved back and forth intermittently and may be selected according to the raw material.
[0016]
In addition, the blades 21 and 23 of the rotary shafts 32 and 33 bite into the front and back of each other, the end portions of the blades 21 and 23 are close to the rotary shafts 32 and 33 side, and the blades of the rotary shafts 32 and 33 Since the blades 21 and 23 rotate at different speeds, the blades 21 and 23 are rotated so as to be close to each other on the other rotation shafts 32 and 33 side in a wide range.
Then, in a state where the material to be kneaded WC adheres around the rotary shafts 32 and 33 and the material to be kneaded WC is cured (solid body WC1), the blades 21 and 23 are solid bodies WC1 around the other rotary shafts 32 and 33. At this time, the elastic material 34 that is the basis of the solid body WC1 is elastically deformed, and the solid body WC1 cannot respond to this elastic deformation, and the solid body WC1 is cracked and shattered. It peels off from the rotating shafts 32 and 33 and falls.
[0017]
【The invention's effect】
In short, the present invention supports the impellers 22 and 24 in the kneading tank 4 so as to be rotatable in multiple axes, and between the rotary shafts 32 and 33, the blades 21 and 23 are mutually connected to the other rotary shaft 32, The blades 21 and 23 are arranged before and after the blades 21 and 23, and are attached to the rotary shafts 32 and 33 so that the tips of the blades 21 and 23 are close to the other rotary shafts 32 and 33, respectively. Since the elastic material 34 is provided around the elastic members 34 and 33, the material to be kneaded WC adheres to and cures on the elastic material 34 around the rotary shafts 32 and 33, and the blades 21 and 23 collide with the solid body WC1. Since the solid body WC1 can not cope with the elastic deformation of the crushed and breaks down, the solid body WC1 is not accumulated and solidified on the outer periphery of the rotary shafts 32 and 33, and the blades 21 and 23 can be prevented from being broken, damaged, etc. The material to be kneaded adheres to the rotating shaft and solidifies and grows. According conventional can eliminate the problem, its practical effect very large, or the like can be obtained homogeneous mass granules with a uniform particle size.
[Brief description of the drawings]
FIG. 1 is a plan view of an embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along the line AA of FIG.
3 is a cross-sectional view taken along the line BB in FIG.
4 is an enlarged cross-sectional view taken along the line CC in FIG. 3. FIG.
FIG. 5 is an enlarged perspective view of a blade.
FIG. 6 is an enlarged perspective view of a blade.
FIG. 7 is a diagram showing a state where a solid body attached to a rotating shaft is peeled off.
[Explanation of symbols]
4 Kneading tank 21 Blade 22 Impeller 23 Blade 24 Impeller 32 Rotating shaft 33 Rotating shaft 34 Elastic material

Claims (1)

An impeller is rotatably supported in multiple axes in the kneading tank, and between the rotating shafts, the respective blades are arranged between the front and rear of the other rotating shaft, and the tips of the respective blades are mutually connected. The kneading and granulating apparatus is characterized in that it is attached to each rotating shaft so as to be close to the other rotating shaft, and an elastic material is provided around the rotating shaft.

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