JP2001321650A - Kneading/granulating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To hinder the subject to be kneaded from adhering to a rotary shaft, solidifying and growing. SOLUTION: In this multi-axis kneading/granulating device, each blade 21 of one of the adjacent rotary shafts 32, 33 is disposed to come before and behind each blade 23 of the other of the adjacent rotary shafts 32, 33 so that the tip of each blade 21 or 23 of one rotary shaft 33 or 32 comes closely to the other rotary shaft 32 or 33 side. An elastic material 34 is disposed around each of the rotary shafts 32, 33. When a solidifying body WC1, which adheres onto the outer peripheral surface of one rotary shaft 32 or 33 and solidifies, grows and comes into contact with the blade 21 or 23 of the other rotary shaft 33 or 32, the material 34 to which the body WC1 is adhered is elastically deformed and the body WC1 is peeled off from one rotary shaft 32 or 33 by this deformation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of granulating a raw material such as a clay lump into small agglomerates, or a method of mixing a raw material with a coagulant such as cement to form a granule. The present invention relates to a kneading and granulating apparatus, and when cement is mixed into a clay ingot to form a small agglomerate, it is used for embedding in the sea, for increasing the volume of various kinds, or for concrete aggregate.

[0002]

2. Description of the Related Art Raw materials such as clay waste and construction waste from the ceramic industry cannot be used as such as landfills along the coast or concrete aggregate, so it is necessary to solidify the raw materials with cement or a coagulant. Conventionally, a twin-screw kneading machine is used in which a pair of rotating shafts are opposed to each other, and a number of blades attached to the rotating shafts are rotated to knead the raw material and the coagulant and granulate and form small agglomerates. It was being done. Also, when a clay plate formed by a filter press is granulated into small granules, a biaxial kneader has been used.

According to this method, 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 the solid grows, the blade is added to the solid. The weight increases due to the wear and damage caused by the collision and the adhesion of the solid body, and a load is generated on the drive source of the rotating shaft. as a result,
The kneading of the coagulant and raw materials by the blades and the cutting function of the mixture are hindered, and the granules that have been erected are not uniform in size.
The mixing of the coagulant and the raw material is also inhomogeneous and has the problem that good quality agglomerates cannot be obtained. Also, when the kneading and granulating apparatus is operated while leaving the solid adhered and solidified on the rotating shaft as described above,
Since the growth of solids increases, the work of removing the solids must be performed frequently.However, this work requires time and effort, is extremely troublesome, and the kneading machine must be stopped every time the work is performed. However, there is a problem that the production efficiency of the agglomerates is poor.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present invention prevents damage to blades and the like by preventing the material to be kneaded from adhering to the rotating shaft and solidifying and growing, and also reduces the load on the drive source of the rotating shaft. It is an object of the present invention to obtain a uniform agglomerate with a reduced particle size and a uniform particle size.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and in a multi-shaft kneading and granulating apparatus, respective blades are arranged between rotary shafts before and after a blade of the other rotary shaft. At the same time, the blades are attached to each rotating shaft such that the tips of the blades are close to each other on the other rotating shaft side, and an elastic material is provided around the rotating shaft so that the blade adheres to the outer peripheral surface (elastic material) of the rotating shaft. When the solidified solid body grows and 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 this deformation causes the solid body to be separated from the rotating shaft. To solve the above problem.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. In the embodiment shown in FIGS.
Is a stationary body of the kneading and granulating machine according to the present invention, which is provided with a kneading tank accommodating section 2 having a concave cross section having a predetermined volume at a front portion of the stationary machine body 1 and a driving section at a rear portion of the kneading tank accommodating section 2. A base 3 is provided. In the present embodiment, the kneading tank housing 2 is shown as having an opening at the top, but the opening is actually covered with a canopy (not shown).

A kneading tank 4 made of plastic rubber, synthetic rubber, or the like having flexibility and elasticity is accommodated and arranged inside the kneading tank housing section 2. The kneading tank 4 has peripheral walls (front and rear left and right side walls) 5, 5a,... And a bottom portion 6, and as shown in FIG. It is fixed to the attachment 8. The flange 7 is vertically opposed to a flange 9 projecting outward from upper ends of the left and right side walls 2a and 2b of the kneading tank housing 2.

A plurality of bearing brackets 10 are fixed to the lower portion of the flange 7 of the kneading tank 4 along the length direction thereof,
Is rotatably supported, and the upper end flange 9 of the kneading tank housing portion 2 is supported.
Rolling arrangement above. Thereby, the kneading tank 4 is supported movably in the front-rear direction along the upper end flange 9 of the kneading tank housing 2. Further, as shown in FIG. 2, the center of the bottom 6 in the lateral direction becomes a slightly higher middle portion 12, and the left and right of the bottom 6 are curved in an arc shape. Then, a plurality of rollers are provided on the back surface of the middle / high section 12 in the longitudinal direction (depth in FIG. 2).
In order to correspond to the rollers 13, a projecting rail 14 having a substantially triangular mountain cross section is protruded at the center of the kneading tank housing 2, and the rollers 13 are rolled and arranged at the top of the projecting rail 14. ing. A hydraulic cylinder 15 for moving the kneading tank 4 back and forth is installed on the base 3, and the tip of the cylinder rod 15 a is fixed to a base 16 erected on the upper end of the rear wall 5 d of the kneading tank 4. The kneading tank 4 is moved forward and backward by driving the hydraulic cylinder 15.

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 provided below the front wall 2c of the kneading tank housing 2. Further, a supply chute 19 is provided at an upper rear portion of the kneading tank 4, and a conveyer 20 for the clay cake W and a supply hopper 20 a for the cement C are provided above the supply chute 19.

In the kneading tank 4, an impeller 22 provided with a plurality of blades 21 having cutting blades 21a and an impeller 24 provided with a plurality of curved blades 23 having an arcuate curved surface 23a are rotatable. Is provided. The impellers 22 and 24 are alternately mounted on a pair of machine shafts 25 and 26 arranged in parallel on the left and right in the kneading tank 4, respectively. In addition, the axes 25 and 26 are the front and rear walls 5c and 5d of the kneading tank 4.
The rear ends of the machine shafts 25 and 26 penetrate the rear wall 2d of the kneading tank housing 2 and protrude onto the base 3, Gears 27 and 28 are attached to the machine shafts 25 and 26, respectively, on the base 3, and one of the machine shafts 25 is connected to a geared motor 29 installed on the base 3 to form a drive shaft. The gear 27 of one of the machine shafts 25 has a larger diameter than the gear 28 of the other machine shaft 26 to have a different rotation ratio, and the other machine shaft 26 rotates faster. The shafts 25 and 26 are rotatably supported by bearings 30 and 30a provided on the front end of the kneading tank housing 2 and the base 3, and the rotation ratio of the shafts 25 and 26 is set appropriately. are doing. The machine shafts 25 and 26 have their front portions slightly inclined downward, and correspondingly, the bottom 6
Also, the front part is slightly inclined downward (see FIG. 3). Further, in this embodiment, the machine axes 25 and 26 are shown as having two axes, but a multi-axis in which three or more machine axes are arranged in the left-right direction may be used.

The impellers 22 and 24 have a boss 31 provided at the center thereof.
The blades 21 and 23 are protruded radially, and the boss 31 is
Fitted and fixed to 25 and 26. The machine shafts 25 and 26 with the bosses 31 fitted thereto form rotating shafts 32 and 33, and are made of plastic rubber or synthetic rubber having flexibility and elasticity over the entire length direction of the rotating shafts 32 and 33. An elastic member 34 composed of
In a state where the solid body WC1 is adhered and solidified to the rotating shafts 32 and 33, the elastic material 34 presses the solid body WC1 from outside.
The elastic material 34 on which the solid body WC1 is adhered is elastically deformed, and the solid body WC1 cannot cope with the elastic deformation, and is set so as to have a sufficient thickness to peel off.

As shown in FIG. 5, the blades 21 provided on the impeller 22 are curved in a bow shape toward the distal end, and a cutting blade 21a is provided on the side of the opening, and the distal end 21b is bent. .
Further, as shown in FIG. 6, the blades 23 provided on the impeller 24 are formed by curving a rectangular plate into an arc shape so as to direct the curved surface 23a outward. The gap S between the inner peripheral surfaces 5, 5a,..., 6 of the kneading tank 4 and the impellers 22, 24, that is, the impeller 21 in the impeller 22
, 6, and the gap S between the curved surface 23a of the blade 23 of the impeller 24 and the inner peripheral surfaces 5, 5a,.

The blade 21 of the impeller 22 has its cutting edge
The material to be kneaded (filter cake W and cement C) WC is mainly sheared at 21a, and compressed between the tip 21b and the inner peripheral surfaces 5, 5a... With impeller 23 of impeller 24,
Mainly, the curved surface 23a and the inner peripheral surfaces 5, 5a,.
The WC to be kneaded is compressed, rolled and folded. Also, as shown in FIGS.
The impellers 22 and 24 fixed to 5 and 26, respectively, are arranged so as to bite between the left and right sides of the impellers 22 and 24, and as shown in FIG. To the other rotation axis
Close to the 32, 33 side.

According to this embodiment, the clay cake W dehydrated and filtered by the filter press is carried by the conveyor 20 and dropped from the supply chute 19 to the rear end of the kneading tank 4. The blades 21, 23 of the impellers 22, 24 are supplied from the supply hopper 20a and driven by the motor 29.
Are kneaded while being sheared, rolled, folded, and compressed between the blades 21 and 23 and between the inner peripheral surfaces 5, 5a... Furthermore, impeller 2
Due to the rotation of 2, 24, the lumps W1 are solidified while rolling between the blades 21, 23 and the inner peripheral surfaces 5, 5a,.
Then, it falls from the discharge hole 17 at the front end of the kneading tank 4 inclined downward and is discharged from the discharge chute 18. The mass L1 obtained is composed of the blades 21 and 23 and the inner peripheral surfaces 5, 5a,.
And the diameter is defined as the gap S between the two.

At this time, on the inner peripheral surfaces 5, 5a,..., 6 of the kneading tank 4, portions corresponding to the intervals before and after the impellers 22, 24 are provided.
The material to be kneaded WC adheres and tries to solidify.
Are always reciprocated back and forth to move the kneading tank 4 supported in the kneading tank housing portion 2 in the axial direction back and forth with respect to the machine shafts 25 and 26, so that the inner peripheral surface 5 of the kneading tank 4 Before the WC to be kneaded adhering to 5a...
The blade 21 is scraped off by the blades 21 and 23 which move relatively back and forth, or slides down due to the vibration of the kneading tank 4. Since the kneading tank 4 is made of a material having flexibility and elasticity, the blades 21 and 23
Even if the material to be kneaded WC is pressed against the inner peripheral surfaces 5, 5a... 6 more than necessary and bent outward, the blades 21, 23 are separated from the material to be kneaded WC, , 6 scatter and fly away from the inner peripheral surfaces 5, 5a. The moving distance of the kneading tank 4 may be at least half of the distance between the front and rear impellers 22 and 24, and usually 10 to 15
Just move cm. It is desirable that the kneading tank 4 is always moved forward and backward. However, the kneading tank 4 may be moved intermittently and may be selected according to the raw material.

The blades 21 and 23 of the rotary shafts 32 and 33 bite into each other between the front and rear sides thereof, and the ends of the blades 21 and 23 are
The blades 21 and 2 of each rotating shaft 32 and 33
Since the blades 3 rotate at different speeds, the blades 21 and 23 are rotated such that the blades 21 and 23 come close to the entire outer peripheral portion on the other rotating shafts 32 and 33 in a wide range. Then, the kneaded material WC adheres around the rotation shafts 32 and 33, and in a state where the kneaded material WC is hardened (solid body WC1), the blades 21 and 23 move the solid body WC1 around the other rotation shafts 32 and 33. At this time, the solid body WC1
The solid material WC1 cannot cope with this elastic deformation, and the solid material WC1 is cracked and crushed, and is separated from the rotating shafts 32 and 33 and falls. I do.

[0017]

According to the present invention, the impeller is provided in the kneading tank 4.
22 and 24 are rotatably supported by multiple axes, and between the rotating shafts 32 and 33, the respective blades 21 and 23 are mutually rotated by the other rotating shaft 3
The blades 21 and 23 are arranged between the front and rear of the blades 21 and 23, and are attached to the rotation shafts 32 and 33 such that the tips of the blades 21 and 23 are close to the other rotation shafts 32 and 33. Since the elastic material 34 is provided around the rotating shafts 32 and 33, the kneaded material WC adheres and hardens to the elastic material 34 around the rotating shafts 32 and 33, and the solid body WC1
When the members 1 and 23 collide, the solid body W
Since the C1 cannot cope and falls down, the solid WC1 does not accumulate and solidify on the outer circumference of the rotating shafts 32 and 33, and the blades 21 and 23 are damaged.
Breakage can be prevented beforehand, and as a result, conventional problems caused by solidification and growth of the material to be kneaded adhered to the rotating shaft can be solved, and a uniform mass with uniform particle size can be obtained. The effect is enormous.

[Brief description of the drawings]

FIG. 1 is a plan view of one embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along the line BB of FIG. 1;

FIG. 4 is an enlarged sectional view taken along the line CC of FIG. 3;

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 in which a solid adhered to a rotating shaft is peeled off.

[Explanation of symbols]

 4 Kneading tank 21 Impeller 22 Impeller 23 Impeller 24 Impeller 32 Rotation axis 33 Rotation axis 34 Elastic material

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4G035 AB46 AE17 4G056 AA01 AA06 BA14 CB02 CC06 CD41 4G078 AA03 AA07 AA17 AB01 AB02 BA01 BA07 DA04 EA08 EA10

Claims (1)

[Claims] An impeller is rotatably supported in a kneading tank on multiple axes. Between the rotation axes, the respective impellers are arranged between the front and rear of the other rotation axis and at the same time, A kneading and granulating apparatus characterized in that the blades are mounted on each rotating shaft such that the tips of the blades are close to each other on the other rotating shaft side, and an elastic material is provided around the rotating shaft.