JPH0131929B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention prevents segregation of powder and granules of different particle sizes or partial aggregation of each particle size when transporting, quantitatively cutting out, or stacking powder and granules. This invention relates to a homogenizing dispersion device.

[Conventional technology]

When a powder or granular material, such as mixed flux for welding, is put into a storage tank and cut out, even if the powder or granules have different particle sizes that have been uniformly mixed in advance, depending on the structure of the storage tank and the method of charging and cutting, the cut-out Segregation occurs in granular materials. When we examine this in detail, we find that segregation occurs when the powder and granules are first introduced into the storage tank (normally, the powder and granules are continuously introduced toward the center of the storage tank, but
If you do this, the center will swell into a mountain shape, and the particle size of the powder will be small in the center and large in the periphery),
In addition, drifting and segregation occur at the stage of cutting out the powder and granules from the storage tank (the powder and granules that come out first are from the center of the storage tank and have small particle sizes, and the powder and granules that come out later are from the periphery of the tank. (The grain size is large). Various methods have been considered to avoid this segregation development, but none have been found to be fully satisfactory.

FIG. 1 shows a conventional example of equipment for feeding and cutting out powder and granular material. In this equipment, four product powder storage tanks 16 are arranged in rows, two in the front and two in the front, and two trolleys with measuring instruments 4 are run on the rails 40 provided above.
1,42 moves. 43 is a wheel, and 44 is a hopper. The carts 41 and 42 can be moved independently,
When a certain amount of granular material is put into the target storage tank 16, it moves to the bottom of the chute 45, where it receives a new supply of granular material. The chute 45 supplies powder to one of the carts 41 and 42 from either the left or right branch. Therefore, while one of the trolleys 41 and 42 is stopped under the chute 45 and receiving powder and granular material, the other moves and drops a fixed amount of powder and granular material into the required storage tank 16 in a short time. do. A trough 46 is connected to the cutout port 13 at the bottom of the storage tank 16, from which the powder is discharged onto a conveyor 47. 48 is a vibrator that vibrates the trough 46, and 49 is a gate that opens and closes the cutting port 13. The powder and granules in the storage tank 16 are of the same type, but they are of different types between storage tanks (of course, they may be the same type), and the powder and granule cut onto the conveyor 47 is of a single type. It may be of a single type from one storage tank, or it may be of multiple types from multiple storage tanks. The conveyor 47 transports the powder to a workshop where it is packed into bags and shipped. 32 is an intermittent charging container.

[Problem to be solved by the invention]

During cutting in such equipment, when dropping the powder from the chute 45 to the hopper 44 and when dropping the powder from the container 32 to the storage tank 16, the falling powder forms a conical mountain. This causes the problem of so-called segregation, in which particles with a small particle size gather in the center of the mountain, and particles with a large particle size as they move away from the center of the mountain, resulting in large differences in particle size depending on the cut location. be.

The present invention was made for the purpose of providing a homogenizing and dispersing device that reduces segregation of powder and granules.

[Means to solve the problem]

The homogenizing and dispersing device for powder and granular material of the present invention includes a rotor body having a dividing plate erected perpendicular to the horizontal plane at the intersection apexes of two sets of bottom plates each inclined downward with respect to the horizontal plane; below the intersection apexes; a rotation axis parallel to the dividing plate; a regulating fluid that divides the space divided by each of the bottom plates and the dividing plate in the direction along the rotation axis; A stopper is provided for stopping the rotor against the rotational moment of gravity of the rotor until the rotational moment due to the accumulation of particles exceeds the rotational moment of gravity of the rotor and the rotor starts rotating in the opposite direction.

[Effect]

When powder fluid is introduced, the powder remains in one of the spaces (first space) immediately below the input, which is divided by each of the bottom plates and the partition plate, and the remaining amount of the powder remains. Due to this increase, the rotation moment of the rotor in the second direction, which is the opposite direction, becomes larger than the rotation moment of the rotor in the first direction, whose rotation is restrained by the stopper, and the rotor rotates in the second direction, causing the rotor to stop. The powder and granules that had been trapped fall from the rotor,
Another space (second space) separated by each of the bottom plates and the partition plate serves as a position for receiving the powder and granular material to be introduced, and the rotor is restrained from rotating in the second direction by the stopper. The powder remains in the second space, and as the amount of the remaining powder increases, the rotation moment of the rotor in the first direction, whose rotation is restrained by the stopper, becomes greater than the rotation moment of the rotor in the second direction. As the size increases, the rotor rotates in the first direction, the powder and granules that have been stuck fall from the rotor, and the first space becomes a position to receive the injected powder and granules, and the rotor rotates in the first direction at the stopper. be detained. In this way, the rotor alternately rotates (reverses) in the first direction and the second direction. Therefore, the powder and granules that are introduced are alternately distributed to the left and right and fall, making it difficult to see the particle size sieving effect in the left and right direction, and also having the effect that the powder and granules are mixed at the falling point.

Furthermore, since there is a flow regulator that divides the space of the rotor in the direction of the rotation axis of the rotor, the natural flow in the direction of the rotation axis of the rotor, where the particle size sieving effect appears, is blocked and the rotor Segregation in the rotation axis direction is reduced.

According to the present invention, by suppressing the sieving effect in the left-right direction and mixing effect by the above-mentioned alternating rotation of the rotor in opposite directions, and by reducing segregation in the direction of the rotational axis of the rotor by the flow regulation, the powder and granules can be uniformly produced. The effect of dispersion is high.

〔Example〕

Fig. 2a shows an external appearance of an embodiment of the present invention, Fig. 2b shows a front view, Fig. 2c shows a side view, and Fig. 2d shows a sectional view taken along line DD in Fig. 2b.

Referring to these drawings, two side discs 1 ₁ ,
1 ₂ is a line connecting their centers, that is, two bottom plates 2 ₁ , 2 ₂ and one partition plate 3 fixed to each other radially at an angle of 120° with the center line as the intersection point. Each end is fixed. Holes are drilled in the side discs 1 ₁ , 1 ₂ below the center line, that is, the intersection of the bottom plates 2 ₁ , 2 ₂ and on the bisector of the bottom plates 2 ₁ , 2 ₂ . in the hole of
A rotation shaft 4 is passed through parallel to the center line and fixed to the side discs 1 ₁ and 1 ₂ by welding. According to this rotation axis 4, it is an eccentric axis of the side disks 1 ₁ and 1 ₂ and is located below the partition plate 3.

A triangular cylindrical flow regulator 5 ₁ is placed on the bottom plate _{1 1 .}
A triangular cylindrical fluid regulator ₅₂ is fixed on the top.
Steel balls 6 ₁ and 6 ₂ are housed in these. Steel balls 6 ₁ , 6 ₂ are holes 7 ₁ , 7 in the front wall of flow regulators 5 ₁ , 5 ₂ .
₂ , and the holes 7 ₁ and 7 ₂ are closed with lids 8 ₁ and 8 ₂ . Balancers 9 are installed on the bottom plates 2 ₁ and 2 ₂ respectively.
₁₁ , 9 ₁₂ , 9 ₂₁ , and 9 ₂₂ are fixed, and two stoppers 10 ₁ and 10 ₂ are fixed to the side disc 1 ₂ . The pivot shaft 4 is pivotally connected at both ends to hanging arms 11 ₁ and 11 ₂ , respectively.

Next, to explain the operation of the embodiment, as shown in FIGS. 2b and 2c, this homogenizing and dispersing device has rectifying fluids 5 ₁ and 5 ₂ located below the hopper 20 and directly below its discharge port 21. The partition plate 3 is set so that the top thereof is located, and the balancers 9 ₁₁ , 9 ₁₂ and 9 ₂₁ , 9 ₂₂ are adjusted so that the partition plate 3 is perpendicular to the horizontal plane in the empty state. At this time, as shown in Fig. 2d, the rotation axis 4 is horizontal and located directly below the partition plate 3, and the bottom plates 2 ₁ and 2 ₂ are inclined downward by the same angle with respect to the horizontal plane. .

When powder is started to be dropped from the hopper, the powder initially flows to both sides of the dividing plate 3, but there is an imbalance in the collision force of the powder to the front and back surfaces of the dividing plate 3, and the bottom plates 2 ₁ and 2 _{2 Due to} the unbalance of the impact force _of the powder and granular material against
1 ₂ rotates clockwise or counterclockwise, for example clockwise, and stops at the position where the stopper 10 ₁ collides with the arm 11 ₂ .
At this time, the steel ball 6 ₁ moves above the rotation axis 4, the steel ball 6 ₂ moves to the farthest point from the rotation axis 4 of the flow regulator 5 ₂ , and the steel balls 6 ₁ and 6 ₂ move toward the rotor. gives a clockwise rotational moment to. In this state, the dividing plate 3 and the bottom plate ₂₂ face the discharge port 21 of the hopper 20,
Almost all of the discharged powder and granules are distributed between the dividing plate 3 and the bottom plate _2.
It accumulates between. When the accumulated amount becomes an amount that generates a counterclockwise moment that is greater than the clockwise rotational moment of the steel balls 6 ₁ and 6 ₂ , the rotor body rotates counterclockwise and removes the accumulated powder and granules. , this time, the steel ball 6 ₁ descends to the farthest position from the rotation shaft 4, and the steel plate 6 ₂ moves above the rotation shaft 4, causing the steel plates 6 ₁ and 6 ₂ to move counterclockwise to the rotor body. gives a rotational moment of The powder particles now accumulate on the partition plate 3 and the bottom plate ₂₂ . Then, when the accumulated amount generates a clockwise rotation moment that is greater than the counterclockwise rotation moment of the steel balls 6 ₁ and 6 ₂ ,
The rotor body rotates counterclockwise. Similarly, while the powder is being dropped from the hopper 20,
The rotor body rotates counterclockwise and counterclockwise at a period determined by the flow rate, the mass of the steel balls 6 ₁ and 6 ₂ , and the shape, dimensions, weight, etc. of the rotor body.

The manner in which the rotor repeatedly reverses itself will be explained in detail with reference to the schematic diagram shown in FIG. 2e. A in FIG. 2e shows an empty state, and in this state, the partition plate 3 is perpendicular to the horizontal plane and balanced. When the powder starts to be dropped from the discharge port 21 of the hopper, the balance is lost and the rotor rotates, for example, clockwise by a predetermined angle and then stops by the stopper _S2 {second
b of figure e}. At this position B, the rotor (steel balls 6 ₁ , 6
The rotational moment due to gravity of the rotor (including rotor ₂ ) is clockwise, and the stopper _S2 resists this moment and stops the rotation of the rotor. In this state, the powder from the discharge port 21 begins to accumulate in the space formed by the partition plate 3 and the bottom plate ₂₁ {FIG. 2E, c}. This space consists of a space on the right side and a space on the left side with respect to the vertical plane P (indicated by the dotted line) passing through the rotation axis, and the powder and granular material FR that accumulates in this right side space applies a clockwise rotational moment to the rotor. Also, the powder FL accumulated in the left-hand space gives a counterclockwise rotational moment to the rotor.
At position C, more powder and granules accumulate in the left-hand space (the rotor is stopped at this position), so the counterclockwise rotational moment gradually increases, and when it eventually exceeds the rotational moment of the rotor's gravity, the rotor reverses. After rotating clockwise to drop the accumulated powder, it is stopped by stopper _S1 at position d in Fig. 2e. At this position 2, the rotor's rotational moment due to gravity is counterclockwise, and the stopper
_S1 resists this moment and stops the rotor from rotating. In this state, the powder from the discharge port 21 begins to accumulate in the space formed by the partition plate 3 and the bottom body 2 ₂ {see FIG. 2e). At position E, more powder and granules accumulate in the right-hand space (the rotor is stopped at this position), so the clockwise rotation moment gradually increases, and when it eventually exceeds the rotation moment of the rotor's gravity, the rotor moves clockwise. Rotate to drop the accumulated powder and granules, then return to position B and press S ₂ .
Stop by. In this way, the rotor repeats reversals. In the embodiment shown in FIGS. 2a to 2d, the stopper ₁₀₁ corresponds to the above-mentioned stopper _S1 , and the stopper ₁₀₂ corresponds to the stopper _S2 .

In this example, the powder and _granular material _is
It is divided into two by the rotation of the rotor body,
The division by the rotation of the rotor main body is divided into two divisions, and the cutting directions are alternated, which has the effect of mixing the powder and granules. The division by the flow regulators 5 ₁ and 5 ₂ is a trickle division of the powder and granular material in the direction along the rotation axis 4, so it has the effect of reducing segregation, and the synergistic effect of the above mixing effect and segregation reduction effect, A powder pool with dispersed particle sizes is formed below the homogenizing and dispersing device. Generally, by arranging many fixed flow regulators, the flow of powder and granules is subdivided, which reduces the distribution density of segregation and improves the uneven distribution of particle size. The grain size is small, and the grain size at the foot is large, and the grain size at the foot of each pile is large. In the homogenizing and dispersing device of the present invention, since a substantially steady flow is changed to an interrupted flow between storage and discharge, the flow diameter sieving effect is less likely to occur, and segregation is accordingly small.

FIG. 3 shows another embodiment of the invention. In this, the space between the side discs 1 ₁ - 1 ₂ is divided by a large number of rectifying plates 15 ₁₁ - 15 ₁₆ , 15 ₂₁ - 15 ₂₆ , and the raised bottoms 16 ₁ , 16 ₂ , . . . between the rectifying plates and the bottom plate A steel ball is stored in between.

The homogenizing and dispersing device of the present invention is, for example, chute 4.
5 and the hopper 44, between the hopper 44 and the storage tank 16, etc.

〔Effect of the invention〕

According to the present invention, by suppressing the sieving effect in the left-right direction and mixing effect by the above-mentioned alternating rotation of the rotor in opposite directions, and by reducing segregation in the direction of the rotational axis of the rotor by the flow regulation, the powder and granules can be uniformly produced. The effect of dispersion is high.

[Brief explanation of drawings]

FIG. 1 is a side view showing an outline of the powder feeding/cutting equipment. Fig. 2a is an external perspective view of an embodiment of the present invention, Fig. 2b is a front view thereof, Fig. 2c is a side view, Fig. 2d is a sectional view taken along the line DD of Fig. 2b, and Fig. 2e is a rotor. FIG. 3 is a schematic diagram showing how the inversion is repeated. FIG. 3 is a perspective view showing another embodiment of the invention. 1 ₁ , 1 ₂ : Side disk, 2 ₁ , 2 ₂ : Bottom plate, 3 : Division plate, 4 : Rotating shaft, 5 ₁ , 5 ₂ : Flow regulator, 6 ₁ , 6 ₂ :
Steel balls, 7 ₁ , 7 ₂ : holes, 8 ₁ , 8 ₂ : lids, 9 ₁₁ , 9 ₁₂ ,
9 ₂₁ , 9 ₂₂ : Balancer, 10 ₁ , 10 ₂ : Stopper,
11 ₁ , 11 ₂ : Hanging arm, 15 ₁₁ , 15 ₁₂ :
Current plate, 16 ₁ , 16 ₂ : Raised bottom.

Claims (1)

[Scope of Claims] 1. A rotor body in which a dividing plate is erected perpendicularly to the horizontal plane at the intersecting apex of two sets of bottom plates, each of which is inclined downward with respect to a horizontal plane; Parallel rotational axes; a rectifying fluid that divides the space divided by each of the bottom plates and the partition plate in a direction along the rotational axis; and rotational moment due to accumulation of powder and granular material at a position where the powder and granular material accumulates in the space. a stopper for stopping the rotor against the rotational moment of gravity of the rotor until the rotor exceeds the rotational moment of gravity of the rotor and the rotor starts rotating in the opposite direction; 2. The homogenizing and dispersing device for powder and granular material according to claim 1, wherein the space between the flow regulator and the bottom plate is hollow, and a spherical plow is housed in the hollow space. 3. The apparatus for homogenizing and dispersing powder or granular material according to claim 1 or 2, wherein the bottom plate has a balancer on its lower surface.