JPS591705Y2 - crusher - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a pulverizer for finely cutting and pulverizing various raw materials, particularly plastic materials, etc., using a rotating blade and fixed blades arranged around the rotating blade.

Conventional pulverizers all have rotating blades lined up around the rotating shaft or drum outer circumference, and a pair of fixed blades symmetrically placed opposite each other at the center of the level surface of the rotating shaft or drum. The material input from the upper material supply port is cut and crushed in this crushing section, and the material to be crushed is discharged through a screen formed in the lower half of the crushing side. Objects to be crushed that are larger than the hole are carried around by the cutter on the side of the crushing barrel, and the corresponding crushing barrel wall surface becomes a rotating wall (friction surface), which generates heat, gels the crushed material, and furthermore causes material to flow to the bearing part. Problems such as intrusion and seizure of particles easily occur, and problems remain in that simply miniaturizing the screen passing holes or cutter structure alone is not suitable for fine grinding, and even if a forced ventilation structure is added, Air pockets occur in the structure and smooth ventilation cannot be achieved.

The present invention was developed to solve these problems, and its features include a group of multiple rotary blades arranged in a row on the circumferential side of the rotating shaft in a horizontal axis position, and A substantially cylindrical crushing section is formed by the fixed blade arranged on the outer circumference of the group and the discharge port formed by the particle size regulating body that surrounds the outer circumference of the rotary blade group in an arc shape, and the discharge port In a pulverizer in which an air duct is provided in communication below and a material supply port is provided in communication above the pulverizing part, a pair of A fixed blade is provided, a particle size regulating body is connected below the fixed blade, and a substantially uniform space communicating with the air duct is provided throughout the outer circumferential side of the particle size regulating body. .

The present invention will be described in detail with reference to the embodiment shown below. Fig. 1 shows a longitudinal sectional front view of an embodiment of the pulverizer of the present invention, and Fig. 2 shows a side view of the same. In both figures, 1 is a rotating shaft; The shaft 1 is supported at both ends thereof by a crusher casing 3 in the direction of both ends of the shaft through bearings 2, 2, and is rotatably moved by a driving pulley 5, a transmission belt 6, a driven pulley 7, etc. from a prime mover 4. 8 indicates the prime mover housing.

A cutter 10 having radial mounting arms 10a arranged in a row via end plates 9, 9 is fixed in the casing 3 on the circumferential surface of the rotating shaft 1, and each mounting arm 10a has a convex portion 10b and a concave portion. 10 C, and these mounting arms 10 a
By attaching the rotary blade 11 to each convex portion 10b, an open cutter type rotary blade structure is achieved in which the concave portion 10C communicates with the inside and outside, and the blade itself is attached using the length of the mounting bolt 12 as shown in the first figure By the hole 13 and the blade advance/retreat adjustment bolt 14.

In the present invention, as a fixed blade located opposite to these 11 groups of rotary blades on the outer circumference defined by the outer diameter thereof, as shown in the first figure, In,
A pair of fixed blades 15.15 are arranged in line-symmetrical positions, and each of these fixed blades 15.15 is attached to the mounting blocks 3a, 3a, which are a part of the casing 3, through the mounting bolts 16, long holes 17, and blades. It is attached by a forward/backward adjustment bolt 18.

In this embodiment, three fixed blades are arranged at three points on the outer circumference. As shown in the figure, the blade 15 is similarly provided directly below the rotating shaft 1 by a block 3b, a mounting bolt 16, a long hole 17, and a blade advance/retreat adjustment bolt 18.

In addition to the structure of the rotary blades 11 and fixed blades 15, in the present invention, the outer circumference of the rotary blades 11 group is An arc-shaped screen (having holes for passing the material to be crushed) 19, 19 is continuously provided so as to surround the pulverized material.

In the illustrated example, the screen 19.19 has three fixed blades 15 arranged in a three-point arrangement, so due to the presence of the fixed blade 15 directly below the rotating shaft 1, the screen 19.19 is divided into two via its mounting block 3b. However, when the fixed blade 15 is omitted, the screen 19.19 may be one continuous screen between the upper fixed blades 15 and 15.

In the illustrated example, these screens 19 are attached and supported by attaching and detaching the upper and lower ends of the frame casing 19a using attachment blocks 3a and 3b.

That is, it is detachably and adjustably attached to the blocks 3a and 3b using long holes 19b and mounting bolts 20,
19C indicates a knob in the frame case 19a.

Furthermore, in the present invention, a pair of left and right drawer doors 21.21 are attached to the casing 3 outside the screen 19.19 so as to be openable and closed, as shown in the first figure. shows a knob on the door 21.21.

Thus, the screen 19.19 faces the door 21.21, and a substantially uniform space is formed over the entire outer circumference of the screen 19.19.

Next, in the present invention, the mounting blocks 3a, 3a of the fixed blades 15.15 are used to attach the material to the upper part of the pair of fixed blades 15.15 arranged in line-symmetrical positions above the level plane H-H. A supply port 22 is provided.

The supply port 22 is composed of a wall 23 and a wall 24,
In this case, one wall 23 has an inclined surface continuous to the mounting block 3a, while the other wall 24 has a recessed wall 24 curved so as to overlap the rotating shaft 1, as shown in the first figure. This is because this digging wall 2
The curve 4 is formed so that the crushed material ejected from the rotary blade 11 in the tangential direction thereof collides with the curved surface and is reflected downward toward the fixed blade 15 in the direction of arrow B in the figure.

In the illustrated example, a material input port 25 is located above the material supply port 22.
Hopper 2 in which a, air supply port 25 and b are formed in a V shape.
5, whereas below the screen 19.19 there is a drop opening 26.5 separated by a mounting block 3b.
26 is provided at the bottom of the casing 3, so that pressurized air supplied from the air supply port 26b of the hopper 25 via an air filter or the like (not shown) is directed to the direction indicated by the arrow A in the figure. As shown, a substantially straight air flow path is obtained that passes through the material supply port 22, the crushing section formed by the rotary blade 11, the fixed blade 15, and the screen 19.19, and runs vertically from the screen 19.19 toward the drop port 26.26. It will be done.

In the illustrated example, 27 is an air feeding duct for the material to be crushed, which is provided using the machine base 28 of the casing 3, and the duct 27 communicates with the drop port 26, 26 through a V-shaped throttle passage 29. An air suction port 32 equipped with a filter 30 and an adjustment damper 31 is provided at one end of the duct 27 opposite to the delivery end, and 27 a indicates a connecting end of the duct 27 .

Further, 33 is a thermometer installed as necessary, this is for measuring the temperature inside the crushing section, and is installed at a selected position in the casing 3 where it does not come into contact with the crushed material. A cooling fan is shown.

According to the pulverizer of the embodiment of the present invention, the pulverized material inputted from the material input port 25a of the hopper 25 passes through the material supply port 22 and is directed to the group of rotary blades 11. It is cut and crushed by the fixed blade 15°15 that is in contact with it, passes through the screen 19.
6, it will be discharged to the outside of the crusher.

At this time, when the crushing starts, pressurized air is sent through the air supply port 25b of the hopper 25 (the air supply does not have to be at this position) by a blowing or suction method, so that the air flows through the air flow path as shown by arrow A. Accordingly, the pulverized material flows smoothly downward, and the inside of the pulverizing section is cooled.

In this case, in this invention, especially in the material supply port 22, one of the walls 24 is a biting wall that overlaps with the rotating shaft 1, so even if the pulverized material is too large to pass through the passage hole of the screen 19, Wall 24 like B
The rotary blade 11 repeatedly collides with the fixed blade 15 and is guided to the cutting section by the fixed blade 15. Since there is no rotating wall surface, heat generation at the material supply port 22, gelation of the material, and intrusion into the bearing part are prevented. Fine pulverization can be reliably obtained without problems such as sticking.

This effect is further enhanced by the large screen 19, which has a wide circumference all around the body of the crushing section below the fixed blades 15 and 15, which are placed above the level plane H-H, and the smooth penetration structure of the air flow path. increases synergistically, and since the fixed blade 15j5 is provided at the lower end of the material supply port 22 and the screens 19, 19 are provided below the fixed blades 15, 15, the conventional fixed rotating wall surface This combined with the adoption of a mounting structure for the rotary blade 11 of the one-sided open cutter type, provides a reliable heat generation prevention and cooling effect within the crushing section, and the large screen area allows for smooth and rapid passage and discharge of the material to be crushed. At the same time, rapid and efficient fine pulverization can be achieved.

That is, since a space is formed over the entire outer peripheral surface of the screen 19.19 with a substantially constant distance from the door 21.21, air circulation is good and the screen 1
The crushed material does not stay in the gap between the door 21.21 and the screen 19.19, and therefore the screen 19.19 is prevented from clogging, and the discharge of the crushed material is improved.

Since the discharge of the pulverized material is improved, generation of frictional heat between the inner surface of the screen 19, 19 and the rotary blade 11 is prevented, and gelation of the pulverized material is prevented.

Also, by installing the fixed blade above the level H-H, both axial sides of the crushing section can be designed as large openings, making it easy to open and close the sides with the screen 19, 19 and door 21, 21, and to take out the screen, as shown in the figure. The maintenance and management operations of each part are extremely facilitated, and the structure of the vertical air flow path from the material supply port 22 through the crushing section 11°15.19 to the drop port 26 allows for both blowing and suction. Regardless of the method, the air circulation effect is more effective and stronger than before, and the almost straight flow path configuration eliminates the possibility of air pockets, etc., as in the conventional method, and prevents stagnation of finely pulverized material. It is particularly advantageous for use in applications where the purpose is fine grinding, as it ensures smooth distribution and movement, and can be used for continuous processing of large quantities without any problems. ing.

Although a screen is shown as an example of a particle size regulator,
The particle size regulator may be a fin roller type in which discharge ports are formed and arranged in the circumferential direction.

According to the present invention, fixed blades are provided on both sides of the lower end of the material supply port,
Since the particle size regulating body is provided below the fixed blade, there is no conventional fixed rotating wall surface, so the friction surface of the rotary blade is reduced, and gelation of the pulverized material is prevented.

In addition, the particle size regulator is connected to the fixed blade above the rotating shaft level, so it surrounds a wide range of over 180 degrees around the outer circumference of the rotary blade, and there is no air duct in the outer circumference of the particle size regulator. Since there is a communicating, approximately uniform space, air circulation is good, and the pulverized material discharged from the regulating body is well discharged, and the pulverized material adheres to the outer circumferential surface of the particle size regulating body and gels. will not occur.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional front view of an embodiment of the present invention, and FIG. 2 is a side view of the same. 1...Rotating shaft, 3...Casing, 3
a, 3b...Mounting block, 11...
Rotating blade, 15...Fixed blade, 19...Screen, 22...Material supply port, 24...
...Burning wall, 25...Hopper, 26...
...fall opening.

Claims (1)

[Scope of utility model registration request] A plurality of rotary blade groups arranged in a row on the circumferential side of the rotating shaft in a horizontal axis position, fixed blades arranged on the outer circumference of the rotary blade group, and surrounding the outer circumference of the rotary blade group in an arc shape. A crusher in which a substantially cylindrical crushing part is formed by a discharge port formed by a particle size regulating body, an air duct is provided in communication below the discharge port, and a material supply port is provided in communication above the grinding part. In,
A pair of fixed blades are provided above the level surface of the rotating shaft and on both sides of the flat end of the material supply port, and a particle size regulating body is connected below the fixed blades, and the outer periphery of the particle size regulating body is A pulverizer characterized in that a substantially uniform space communicating with an air duct is provided throughout the side.