JPH11300229A - Milling apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a milling apparatus with a simple structure for producing a fine powder of a raw material such as husks by milling in one process. SOLUTION: This milling apparatus mills husks supplied from a pore part 28 by rotation of a rotor 32 and transports the resultant milled husks to a through hole 48 of a nozzle 16 by a screw 36 from a transportation outlet 40. A truncated cone 62 of a valve element 50 of a pressure valve 18 enters the through-hole 48 in the opening part side. The valve element 50 is constantly pushed to the through-hole 48 side by a spring 54. Consequently, the milled husk to be supplied to the through-hole 48 is pressurized in the end part in the opening side and ground to be a fine powder and discharged from the gap between the end part of the opening side and the pushing part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pulverizing apparatus for pulverizing raw materials in one step and pulverizing the pulverized raw materials again to obtain fine powder.

[0002]

2. Description of the Related Art In order to use rice husks and sawdust as biomass, apparatuses for crushing rice husks have been developed. For example, the structure of rice hulls is destroyed by crushing, and the rice husks are regenerated as a material having excellent properties of water absorption, water retention, and air permeability. For example, agriculture, animal husbandry,
It can be used in fields such as industry.

[0003] Further, the crushed rice hulls are pulverized again into fine powders, so that the husks can be used as a medium material for fungus beds, a reinforcing filler of synthetic rubber or synthetic fiber, or a raw material for papermaking.

[0004]

However, in order to produce fine powder from rice hulls as described above, the raw material is crushed by a crushing device, and the crushed raw material is further crushed by another crushing device. Had to be powdered. As described above, since it takes two steps to produce the fine powder, there is a demand for an apparatus that can perform from the raw material to the fine powder in one step.

[0005] In addition, if the apparatus is configured to produce from raw material to fine powder by one pulverization, there is a disadvantage that the apparatus becomes complicated and expensive.

The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a crushing apparatus which has a simple structure and crushes raw materials such as chaff in a single step to produce fine powder.

[0007]

According to the first aspect of the present invention, there is provided a crushing means for crushing the supplied raw material, and a crushing means provided so as to protrude from a discharge port of the crushing means. A screw that is conveyed outward from an outlet, a nozzle that is provided continuously to the carry-out port and has an inner hole that receives the screw, and the opening that presses against the opening of the inner hole of the nozzle by urging force. And a pressure contact member which is separated from the opening by an internal pressure of the crushed raw material conveyed to the inner hole exceeding the urging force.

The operation of the first aspect of the present invention will be described.

The raw material is pulverized by supplying an appropriate amount of the raw material to the pulverizing means by the supplying means. The pulverized raw material is conveyed from the outlet of the pulverizing means to the inner hole by a screw. Since the opening of the inner hole is closed by the pressing member, the crushed raw material conveyed by the screw is compressed. When the compressive force (pressure) increases and exceeds the urging force for pressing the press-contact member against the opening, the press-contact member slightly separates from the opening of the inner hole, and the pulverized raw material becomes fine powder to the outside. It is rubbed out. Therefore, it can be performed in one continuous process from the raw material to the fine powder.

According to a second aspect of the present invention, in the first aspect of the present invention, the pressing member has a substantially conical shape in which a cross-sectional area decreases toward the tip, and the conical surface presses against the opening. It is characterized by having.

The operation of the second aspect of the present invention will be described.

Since the conical surface (slope) of the pressure contact member is in pressure contact with the opening of the inner hole, the pressure contact portion is in line contact. Therefore, the fine powder is easily led out.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A pulverizer according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing the entire configuration of the crusher, and FIG. 2 is a cross-sectional view of a main part of the crusher.

As shown in FIG. 1, the pulverizing apparatus 10 includes a supply means 12 for supplying a raw material, a pulverizing means 14 for pulverizing the supplied raw material, a nozzle 16 for conveying the pulverized raw material,
Pressure valve 18 for pulverizing the pulverized raw material again into fine powder
And is basically composed of

The supply means 12 comprises a conveyor 20 for conveying the raw material, a chute 24 for guiding the hopper 22 from the upper end of the conveyor 20, and a hopper 22 for storing the raw material. At the lower end of the hopper 22, an impeller (not shown) that is rotated by the driving force of the motor 26 is provided.
By changing the rotation amount of the impeller, the crushing means 14 is changed.
Adjust the feed rate of raw materials to the system.

As shown in FIG. 2, the crushing means 14 includes a housing 30 having a bell-shaped hole 28,
8 and a rotor 32 that rotates inside.

The rotor 32 is formed in a substantially bell-shaped shape, and has a spiral convex portion (not shown) formed on the outer peripheral surface thereof. The rotor 32 is screwed to the tip of a shaft 34 that is rotated by the driving force of the motor 26, and
A screw 36 is screwed on the opposite side. Therefore,
The rotor 32 and the screw 36 rotate integrally by driving of the motor 26.

A spiral projection (not shown) is also formed in the hole 28 of the housing 30. When the rotor 32 is rotated, the rotor 32 rotates with respect to the projection of the housing 30. The protrusion slides, and crushes the raw material supplied to the hole 28.

The housing 30 has a supply hole 38 communicating with the hopper 22, and a discharge port 40 having a circular cross section for discharging the raw material pulverized in the hole 28.

The nozzle 16 has a substantially cylindrical shape, and has flanges 42 and 44 at both ends. A hole 46 for inserting a rod 56 to be described later is formed on the outer edge of the flange 44. The nozzle 16 has a carry-out port 40.
A through hole 48 having a diameter larger than that (preferably, about 2 mm larger) is formed.

As shown in FIG. 2, the nozzle 16 is screwed by a flange 42 to the outlet 40 of the housing 30. As a result, the screw 36 protruding outside from the outlet 40 enters the through hole 48.

The pressure valve 18 is mounted on the flange 44 side of the nozzle 16.

The pressure valve 18 comprises a valve body 50, a support plate 5
2. It basically comprises a spring 54 and a rod 56.

The valve body 50 has a cylindrical shape, a flange 60 is formed at one end thereof, and a truncated cone 62 is formed at the end thereof. A plurality of holes 64 for inserting a rod 56, which will be described later, are formed in the flange 60 at a plurality of locations in the circumferential direction.

The support plate 52 is a disc having a hole 66 through which the valve body 50 can be inserted at the center and a hole 68 through which the rod 56 can be inserted at the outer edge.

The rod 56 has a thread 56a at one end and a screw 56b at the other end. This rod 56 is connected to the hole 46 of the flange 44 of the nozzle 16 and the valve body 50.
Hole 64 of the flange 60 and hole 6 of the support plate 52
8 and tightened with a nut 70. Thereby, the elastic force of the spring 54 mounted between the flange 60 of the valve element 50 and the support plate 52 causes the valve element 5
The 0 truncated cone 62 is pressed against the through hole 48 at a predetermined pressure. Since the center axes of the truncated cone 62 and the through-hole 48 coincide with each other, there is no gap between the slope of the truncated cone 62 pressed by the spring 54 and the end of the through-hole 48 on the opening side.

By controlling the rotation speed of the motor 26, the supply amount of rice hulls (the rotation speed of the impeller) and the rotor 3 are controlled.
2 and a control box 72 for automatically controlling the rotation speed of the screw 36 (the shaft body 34).

The operation of the crushing device 10 having the above-described configuration will be described.

The raw material whose moisture is dried to about 10 to 13% at the lower end of the conveyor 12 in the crusher 10 is loaded with, for example, rice hulls.
2 is supplied to the hopper 22 through the chute 24 from the upper end, and the supply amount is adjusted by the impeller.
4 is supplied.

The rice hull supplied from the supply hole 38 to the hole 28 by the crushing means 14 is crushed by the protrusion of the rotor 32 rotating together with the shaft 34 sliding on the protrusion of the housing 30. Then, it is guided by the convex portion of the rotor 32 and moves to the carry-out port 40 side. The crushed rice hulls that have reached the carry-out port 40 are fed into the through holes 48 of the nozzle 16 while the feed speed is controlled by the rotation of the screw 36.

At this time, a predetermined pressure is applied to the rice hulls based on the supply amount of rice hulls (the number of rotations of the impeller) and the discharge amount of the crushed rice hulls (the number of rotations of the rotor 32) specified by the driving force of the motor 26. A nozzle 16 having a through hole 48 having a diameter (cross-sectional area in the conveyance direction) that acts is mounted on the crushing means 14 (portion 40). Here, the transport direction refers to the direction of the flange 42 in the central axis direction of the through hole 48.
This is the direction from the (outlet 40) side to the flange 44 side, and the section in the transport direction is a section orthogonal to the transport direction.

Further, since the truncated cone 62 of the pressure valve 18 has entered the through hole 48 at the end of the through hole 48 on the flange 44 side, the cross section in the conveying direction is reduced inside the through hole 48 and the crushed rice hulls are reduced. Are compressed into a plastic conjugate by the action of lignin.

This combined body is extruded toward the truncated cone 62 by the crushed rice hulls supplied by the screw 36. As a result, the pressure of the coupling body inside the through-hole 48 exceeds the elastic force of the spring 54, so that the truncated cone 6
2 is slightly separated from the inner wall of the through hole 48, and the combined body is crushed to the outside as fine powder.

In the pulverizer 10, fine powder can be produced from rice hulls in one step only by mounting the nozzle 16 and the pressure valve 18 at the outlet 40 for the pulverized raw material.

Further, by removing the nozzle 16 and the pressure valve 18, the crushed chaff can be taken out and used.

In this embodiment, the crushing means 1
Although the housing 4 and the nozzle 16 are configured separately, they may be formed integrally.

[0037]

According to the first aspect of the present invention, it is possible to produce from a raw material to a fine powder in one step while having a simple structure.

According to the second aspect of the present invention, the fine powder is more easily led out.

[Brief description of the drawings]

FIG. 1 is a perspective view of a crusher according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a main part of a crusher according to one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Crusher 14 Crushing means 16 Nozzle 18 Pressure valve (pressure contact member) 36 Screw 40 Carry-out port 48 Through-hole (inner hole)

Claims (2)

[Claims] 1. A crushing means for crushing a supplied raw material, a screw provided so as to protrude from a discharge port of the crushing means, and conveying the crushed raw material outward from the discharge port; A nozzle having an inner hole for accommodating the screw, which is provided continuously to the nozzle, and being pressed into contact with the opening of the inner hole of the nozzle by an urging force to close the opening, and pulverized being conveyed to the inner hole. And a press-contact member which is separated from the opening by an internal pressure of the raw material exceeding the urging force. 2. The crushing device according to claim 1, wherein the pressure contact member has a substantially conical shape in which a cross-sectional area decreases toward the tip, and the conical surface is pressed against an opening. .