JPH0731894A - Material introducing device in vortex type pulverizing mill - Google Patents

Abstract

PURPOSE:To provide a material introducing device wherein material is effectively introduced together with suction air from an air inflow path so as not to adhere to a shell cylinder at the lower introduction side of a vortex type pulverizing mill. CONSTITUTION:In a vortex type pulverizing mill, a suction air-discharging powder chamber 2 and an air inflow path 3 are communicated and provided successively in the upper and lower parts of a cylindrical shell. A rotary shaft 6 having a plurality of rotary plates is axially fitted to the inside of the shell cylinder having a liner 4 on the internal circumference. When material sent from the air inflow path is passed through the shell cylinder, material is allowed to collide against the liner by vortex caused by the rotary plates and pulverized. A closed-end suction bowl body 8 is communicated and provided successively in the lower part of a small-diameter suction port 7 formed in the center part of the base of the shell cylinder. An inflow port becoming a circular arc shape in plan view is formed on the circumferential face of the suction bowl body. A horizontal one side 3a has width narrower than the inside diameter of the suction bowl body and becomes at least the terminal side of the air inflow path communicated with the inflow port. The horizontal one side 3a is lengthened toward the direction of a tangential line of the circumferential face of the suction bowl body and also the terminal part thereof is provided successively in the end part of one end side of the inflow port.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a substance introduction device for a vortex type fine pulverizer capable of effectively introducing substances such as grains into the barrel from an air passage along with intake air.

[0002]

2. Description of the Related Art Conventionally, as seen in Japanese Patent Application No. 1-101384 filed by the applicant of the present invention, an intake and exhaust chamber and an air passage are provided in the upper and lower portions of a vertical cylindrical barrel. A rotating shaft having a plurality of rotating plates is axially mounted inside the barrel having a liner on the inner circumference, and when the substance fed from the air passage passes through the barrel. In a vortex type fine pulverizer in which a substance collides with a liner by a vortex flow generated by a rotating plate to pulverize the substance, as shown in FIG. 6, a barrel formed on the end side of a narrow air passage A. The inflow port a on the lower side had a structure in which the center of the inflow port a in the widthwise direction coincides with the center point 0 _{1 of the} barrel and opens straight.

[0003]

However, as shown in FIG. 6, when the intake air and the substance flow and are introduced from the air passage A as shown by the arrow A, the rotary shaft 6 is introduced from the inflow port a.
As shown by the arrow B while avoiding a, it is introduced into the area on the opposite side of the inlet a indicated by P and is in a state of collision,
After that, from the state of the initial speed 0, it will start rising as it hits the clockwise air vortex as shown by arrow C and the lower fan above, but if there is a substance with a lot of water, a lot of oil and fat, or a substance with high adhesiveness, In the area part indicated by P, small spherical bodies are initially formed, and these small spherical bodies gradually grow without rising, and depending on the object to be ground, they adhere to the P area part. As the number of kimonos increases, the introduction part and the inlet a side are filled, and the introduction of the substance is stopped, which also causes the machine to stop.

[0004]

DISCLOSURE OF THE INVENTION The present invention solves such a problem and enables the substance to be introduced effectively from the air passage along with the intake air. Therefore, the substance is formed at the center of the bottom surface of the barrel. A suction pan body having a bottom is continuously provided below the small-diameter suction port, and an inlet having a circular arc shape in plan view is formed on the peripheral surface of the suction pan body, and the suction pan body has a width larger than the inner diameter of the suction pan body. At least one end side of the air inlet passage that becomes narrow and communicates with the inlet is extended toward the circumferential surface tangential direction of the suction dish, and the end thereof is one end side of the inlet. In addition, it is configured to be connected to the end portion, and at least the other end side of the air passage is substantially parallel to the one end side, and the end is the other end of the inlet. , The suction pan body is formed in the shape of an inverted truncated cone, or one side of the air passage. And the other side surface is formed so as to extend in a plane inclined with respect to the extending direction of the air passage, or the height of the inflow port is formed to be substantially the same as the height of the suction tray body, or the air passage is formed. Above or below the horizontal side surface, the terminal side is widened to form a guide surface that is bent and inclined with respect to the horizontal side surface, or the horizontal widthwise center line of the air passage matches the center point of the suction tray body. Alternatively, the lower surface of the midway portion of the air passage is configured to be a front-down inclined surface.

[0005]

Therefore, with the intake air swirling upward from the inside of the suction tray, the air and the substance flowing in the air passage are made to flow toward the side of one lateral side which is the end side. However, the substance is guided by the one side surface and is introduced from the end side of the inlet in the tangential direction of the peripheral surface of the suction dish body, and the substance is reduced to the initial velocity while remaining in the air vortex inside the suction dish body. Will be introduced without
Therefore, the substance effectively flows without adhering to the inner peripheral surface of the suction dish, and further, self-cleaning is performed so that the energy of the introduced substance in the tangential direction does not adhere to the inner peripheral surface of the suction dish. be able to.

[0006]

1 to 5, FIG. 2 is a side sectional view showing a part of an eddy current type fine crusher, in which the upper and lower parts are mounted on bearings 10a and 10b at the center of the upright cylindrical barrel 1. A bottom plate on which a vertical rotation shaft 6 which is mounted on a shaft and driven by an input pulley 11 at the lower end is mounted, and which has a small-diameter suction port 7 in the center of the lower portion of the barrel 1 and whose upper surface is a tapered surface. 12 is formed,
A plurality of rotary plates 5 are fitted to the rotary shaft 6 in the barrel 1 at intervals in the vertical direction, and a lower fan 13 approaching above the bottom plate 12 is attached to the lower part of each rotary plate 5. A plurality of vertical stirring plates 14 are mounted on the outer periphery,
A liner 4 having a surface in the direction of resistance to the flow of powder is attached to the inner peripheral surface of the barrel 1 which is the outer periphery of each stirring plate 14,
Further, an air tight plate 16 having a ventilation hole 15 is provided above the body cylinder 1 to connect an intake / exhaust powder chamber 2 in communication therewith, and an upper fan 17 is attached to a rotary shaft 6 in the intake / exhaust powder chamber 2. And the discharge port 18 is continuously provided on the outer peripheral portion of the intake milling chamber 2 to have the same structure as the conventional structure.

Below the suction port 7, which is the lower part of the barrel 1, a bottomed suction tray body 8 having an inverted truncated cone shape in which the inclination angle θ of the tapered surface is approximately 72 degrees is continuously provided. A traverse which forms an arcuate inlet 9 of the suction dish 8 and can supply a substance such as grain from a hopper 19 at the tip as in the conventional case and take in air from the vicinity thereof. The air passage 3 having a square surface length is extended to the inflow port 9 side, but the width of the air passage 3 is made narrower than the inner diameter of the suction tray body 8 and the center of the air passage 3 in the width direction. One horizontal side surface 3 that extends so that the line X coincides with the center point O of the suction pan body 8 and is at least the end side of the air passage 3
As shown in FIG. 1, a is inclined in a plane with respect to the extending direction of the air passage 3 and extends in the tangential direction of the peripheral surface of the suction dish 8 which is on the one end side end 9a side of the inflow port 9. Formed as
As shown in FIG. 5, a lower end portion of the lateral one side surface 3a is bent and inclined with respect to the lateral one side surface 3a so that a terminating end which becomes a triangular shape in a side view and widens matches the inclined surface of the suction dish body 8. And a guide surface 3a connected to the end 9a of the inflow port 9
As shown in FIGS. 1 and 3, the lateral other side surface 3b which forms a and is at least the terminal side of the air passage 3 is made substantially parallel to the lateral one side surface 3a, and the terminal end portion thereof is the other side of the inlet 9. The lower surface 3c, which is connected to the other end 9b and is located in front of the horizontal one side surface 3a and the other lateral side surface 3b, in the middle of the air passage 3 is a downward sloped surface as shown in FIG. Is formed and configured as described above, and the one lateral surface 3a and the guide surface 3aa are formed.
Has a very smooth finished surface with no irregularities.

Therefore, the air and the substances flowing in the intake passage 3 are shown by the arrow E group with the intake air swirling in the upward direction from the inside of the suction dish 8 as shown by the arrow D. While flowing so as to be moved toward the lateral one side surface 3a, it is guided by the lateral one side surface 3a and the guide surface 3aa and introduced from the end 9a side of the inflow port 9 in the circumferential surface tangential direction of the suction tray body 8. Then, the substance is introduced into the air vortex in the suction dish body 8 as it is without being reduced in initial velocity, and therefore the substance is effectively distributed without adhering to the inner peripheral surface of the suction dish body. In addition, it is possible to perform self-cleaning so that the inner peripheral surface of the suction dish does not adhere due to the tangential energy of the substance to be introduced, and the suction dish 8 is formed in an inverted truncated cone shape. So Inside the write Salathai 8 can be increased so that the concentration of air and material becomes thinner towards the top from the bottom, a smooth substance that is introduced into the inside of the suction Salathai 8.

[0009]

As described above, according to the present invention, the suction dish body (8) is provided.
With the intake air that swirls inward from above,
The air and substances flowing in the intake passage (3) are
While flowing to the side of a), one side (3
Guided by a), the substance is smoothly introduced from the end portion (9a) side of the inflow port (9) in the tangential direction of the peripheral surface of the suction dish body (8), and the substance inside the suction dish body (8). Will be introduced into the air vortex without any reduction in initial velocity, and therefore the substance will be effectively distributed and introduced without adhering to the inner peripheral surface of the suction dish (8). Moreover, the self-cleaning can be effectively performed so that the inner peripheral surface of the suction dish body (8) is not adhered by the tangential energy of the substance to be introduced. The performance of the seed and fine pulverizer can be further improved, and it has a feature that it can be suitably implemented with a simple structure.

[Brief description of drawings]

FIG. 1 is a plan sectional view showing a main part of an embodiment of the present invention.

FIG. 2 is a side sectional view schematically showing a part of a vortex type fine pulverizer.

FIG. 3 is a plan view showing a part of FIG.

FIG. 4 is a side sectional view showing a part of FIG. 2 in an enlarged manner.

FIG. 5 is a side sectional view showing a part of FIG.

FIG. 6 is a plan view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylinder 2 Air intake / exhaust chamber 3 Air passage 4 Liner 5 Rotating plate 6 Rotating shaft 7 Suction port 8 Suction dish 9 Inflow port 3a One lateral side 3aa Lower lower surface 3b Other side 3c Lower surface 9a End 9b Other end Part X Center line O Center point

Claims (8)

[Claims] 1. An intake / exhaust powder chamber (2) and an air passage (3) are connected to the upper and lower portions of an upright cylindrical barrel (1), and a liner (4) is provided on the inner circumference. The barrel having (1)
A rotary shaft (6) having a plurality of rotary plates (5) is mounted inside the rotary plate (6) when the substance introduced from the air passage (3) passes through the barrel (1). In a vortex type fine pulverizer in which a substance collides with the liner (4) by the vortex flow generated by 5) and is pulverized, the lower side of the small-diameter suction port (7) formed in the center of the bottom surface of the barrel (1). A suction pan body (8) having a bottom is connected to and connected to the suction pan body (8).
An inflow port (9) having an arc shape in plan view is formed on the peripheral surface of
One side surface (3a), which is narrower than the inner diameter of the suction dish body (8) and is at least the terminal side of the air inlet passage (3) communicating with the inflow port (9), is formed on the suction dish body ( 8)
Of the vortex type fine pulverizer, which is configured to extend in the tangential direction of the peripheral surface of the No. 1 and the end of the No. 1 is connected to one end (9a) of the inlet (9). . 2. A lateral other side surface (3b) which is at least a terminal end side of the air inlet passage (3) is made substantially parallel to the lateral one side surface (3a), and its terminal end portion is the other end side of the inflow port (9). The substance introduction device for a vortex type fine pulverizer according to claim 1, wherein the substance introduction device is connected to the other end (9b). 3. The substance introduction device for a vortex type fine pulverizer according to claim 1, 2 or 3, wherein the suction dish body (8) is formed in an inverted truncated cone shape. 4. A lateral side surface (3a) and a lateral side surface (3b) of the air passage (3) are formed so as to extend with a plane inclination with respect to the extending direction of the air passage (3). The substance introduction device for a vortex type fine pulverizer according to claim 2. 5. The height of the inflow port (9) is formed substantially the same as the height of the suction dish body (8).
The substance introduction device of the vortex type fine pulverizer described. 6. The lateral side surface (3a) is formed by widening the terminal side above or below the lateral side surface (3a) of the air passage (3).
The substance introducing device for a vortex type fine pulverizer according to claim 1, 2, 3, 4, or 5, wherein a guide surface (3aa) that is bent and inclined with respect to is formed. 7. A center line (X) in the width direction of the air passage (3).
7. The substance introduction device for a vortex type fine pulverizer according to claim 1, 2, 3, 4, 5, or 6, wherein is aligned with the center point (0) of the suction dish body (8). 8. A lower surface (3) of an intermediate portion of the air passage (3).
C) is a downwardly inclined surface.
The substance introduction device of the vortex type fine pulverizer according to 4, 5, 6 or 7.