JPH039799Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a pulverizer that pulverizes a material to be pulverized into fine particles ranging from the order of microns to more than 10 microns.

[Conventional technology]

Conventionally, as the above-mentioned pulverizer, for example, JP-A-59
-The one published in Publication No. 105853 is known. As shown in FIG. 3, this pulverizer includes a lower housing 2 having a supply port 1 for a material to be crushed (not shown) placed on a base 3, and a cylindrical shape attached to the upper end of the lower housing 2. An upper housing 6 having a discharge port 5 for products (not shown) is connected to the upper end of the stator 4 to form a housing, and a cylindrical cylinder supported by a rotating shaft 7. The rotor 8 is arranged in a housing in correspondence with the stator 4, and the upper and lower ends of the rotating shaft 7 are attached to the upper housing 6 and the base 2 via bearings 9 and 10, respectively. The stator 4 and the rotor 8 are opposed to each other with a small gap therebetween, and the inner surface of the stator 4 and the inner surface of the rotor 8 are provided with a large number of protrusions 4a and 8a parallel to the generating line, respectively. are formed continuously in the circumferential direction.

In the pulverizer configured as described above, the material to be pulverized is sucked together with air into the lower casing 2 from the supply port 1 by operating a rotor-driving electric motor and a suction blower (both not shown) connected to the discharge port 5. The stirring blades 11 fixed to the lower surface of the bottom wall of the rotor 8 cause the airflow to rise along the inner circumferential surface of the lower casing 2 and form between the stator 4 and the rotor 8. The powder is fed into a crushing chamber, and kinetic energy is applied by the rotor 8 that rotates at high speed to cause it to collide with the stator 4 to be crushed, and the convex portion 8a of the rotor 8 crushes it by impact, and then the convex portion 4a of the stator 4 Rotor 8
The convex portion 8a of the rotor is used to grind the particles into even finer particles, and the air is carried upward in the upward spiral airflow generated by the suction by the suction blower and the high-speed rotation of the rotor 8, and is carried upward into the upper casing 6. It is rotated along the inner circumferential surface of the upper casing 6 by a centrifugal blade 12 fixed to the upper surface of the upper wall of the rotor 8, discharged from the machine through the discharge port 5, and introduced into a bag filter (not shown). Here, the product and air are separated, the air is exhausted to the atmosphere via a suction blower, and the product is sent from the bag filter to the hopper and stored there.

In FIG. 3, reference numeral 3 denotes a pulley attached to the lower end of the rotating shaft 10, which is interlocked with a pulley of an electric motor (both not shown) via a belt 14.

[Problem that the invention attempts to solve]

However, according to the above-mentioned conventional pulverizer,
Cleaning of the stator 4 and rotor 8 due to changes in product color and particle size, inspection and maintenance work of the stator 4 and rotor 8, and replacement of blades (protrusions) of the rotor 8, etc. When performing cleaning, the upper housing 6 and stator 4 must be removed and the rotor 8 must be placed upright on the base 2.
In addition to problems such as maintenance work being time-consuming,
This may cause damage to the bearing 10 below the rotating shaft 7, etc.

Therefore, the present invention aims to provide a pulverizer that can easily and completely clean, inspect, and maintain the stator, rotor, etc. without causing any damage.

[Means for solving problems]

In order to solve the above problems, the present invention includes a lower housing having a supply port placed on a base, two supports erected on the base with the lower housing as the center of symmetry, and a lower housing having a discharge port. The upper housing is placed on both supports, the stator interposed between the lower housing and the upper housing is divided into two in the radial direction, and each segment is hinged to the support supports, and the stator is placed on the top of the upper housing. A hole with the same diameter as the stator's inner diameter is provided, and this hole is closed with a removable cover plate, and the rotor supported by the rotating shaft is inserted into the stator with a small gap, and the rotor is rotated. A bearing at the lower end of the shaft is removably attached to the base, and a bearing at the upper end of the rotating shaft is attached to the cover plate.

[Effect]

According to the above means, by releasing the fastening of the segments of the stator, etc., and rotating each segment outward around the hinge of each support, the inner circumferential surface of the segment and the outer circumference of the rotor are removed. The surface is completely exposed. Furthermore, by removing the bearing at the lower end of the rotating shaft from the base and removing the cover plate from the upper housing, the rotor can be pulled out upward.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In the figure, 21 is a cup-shaped lower casing placed on a base 22, and this lower casing 2
The peripheral wall 21a of the lower casing 21 has a truncated inverted conical inner peripheral surface, and a tangential supply section 23a and a spiral guide section connected to the supply section 23a are provided at the lower part of the lower casing 21. 23b, the material to be crushed (not shown) is transported together with air into the lower housing 2.
1 is provided with a supply port 23 for supplying the same.

On the other hand, two pillars 24a and 24b are erected on the base 22 with the lower housing 21 as the center of symmetry. A cap-shaped upper housing 25 is placed on both supports 24a and 24b, and a hole 26 having the same inner diameter as the stator, which will be described later, is provided in the upper part of the upper housing 25.
is closed by a removable cover plate 27. Further, the upper housing 25 has a discharge port which is composed of a spiral guide part 28a and a tangential discharge part 28b connected to the guide part 28a, and which discharges the product (not shown) to the outside of the machine together with air. 28 is provided, and this discharge port 28 is connected to a suction blower (not shown).

The lower housing 21 and the upper housing 25
A cylindrical stator 29, which together with these constitutes a housing, is interposed between them. Stator 2
9 is a segment 29a, 2 divided into two in the radial direction.
9b, each segment 29a, 29b
are fastened to the lower housing 21 and the upper housing 25 and to each other via a plurality of fasteners (not shown), and are individually hinged to the support columns 24a, 24b via a plurality of hinges 30 so as to be horizontally rotatable. and each segment 29a, 29b
A large number of protrusions (fixed blades) 31 parallel to the generatrix are provided continuously in the circumferential direction on the inner peripheral surface of the blade.

A cylindrical rotor 33 supported by a rotating shaft 32 is fitted concentrically into the stator 29 with a small gap therebetween. On the outer circumferential surface of the rotor 33, a large number of protrusions (rotary blades) 34 parallel to the generatrix are provided continuously in the circumferential direction, and on the upper and lower ends of the rotor 33, cone-shaped protrusions are provided. Sections 35 and 36 are provided, respectively. On the other hand, the rotating shaft 32 has a lower end bearing 32a removably attached to the base 22, and an upper end bearing 32b attached to the cover plate 27. And the base 22
A pulley 3 is attached to the lower end of the rotating shaft 32 that protrudes inward.
7 is attached, and this pulley 37 is interlocked with a pulley of an electric motor (both not shown) via a belt 38.

In the pulverizer having the above configuration, when the electric motor and the suction blower are operated, the material to be pulverized is transferred to the supply port 23.
The surrounding wall 2 of the lower housing 21 is guided together with air from the supply part 23a to the guide part 23b and sucked into the lower housing 21 without disturbing the flow.
It is guided by the lower protrusion 36 of the rotor 33 and the stator 29, and is sent into the crushing chamber formed between the stator 29 and the rotor 33, where it absorbs kinetic energy by the rotor 33, which is rotated at high speed. given stator 2
9 and is shattered, and the convex portion 3 of the rotor 33
4, and is further ground between the convex portion 31 of the stator 29 and the convex portion 34 of the rotor 33 to be further finely crushed. The air is sent into the upper housing 25 on the upward spiral airflow generated by the rotor 33, and is gradually released without disturbing the flow while being guided by the protrusion 35 at the upper end of the rotor 33. The product is discharged outside the machine from the discharge part 28b while being guided by the guide part 28a of 28 in a spiral shape, and the product and the air are separated by a bag filter (not shown), and the air is exhausted to the atmosphere through a suction blower. , the product is sent from the bag filter to a hopper (not shown) and stored there.

However, due to product changes, the stator 29, rotor 33, lower housing 21 and upper housing 2
Cleaning work such as 5, inspection and maintenance work of stator 29 and rotor 33, or stator 29 and rotor 3
When replacing the protrusions 31 and 34 in No. 3,
The respective segments 29a and 29b of the stator 29 are released from each other and the lower housing 21 and the upper housing 25, and each segment 29a,
29b to the outside around the hinge 30, or by removing the bearing 32a at the lower end of the rotating shaft 32 from the base 22 and removing the cover plate 27 from the upper housing 25, the rotor 33 can be rotated outwardly around the hinge 30. 3
2 etc. and pull it out upward from the housing.

[Effect of idea]

As described above, according to the present invention, each segment of the stator, which is divided into two parts, is rotated outward at a large opening around the hinge of each support, and the rotor is rotated upward together with the rotating shaft. Since it can be pulled out, cleaning work, inspection/maintenance work, and replacement work can be performed easily and completely without causing any damage, without removing the upper housing, stator, etc. as in the conventional case.

[Brief explanation of drawings]

FIGS. 1 and 2 are a partially omitted vertical cross-sectional view and a partially cutaway plan view of a fine pulverizer showing an embodiment of the present invention, and FIG. 3 is a vertical cross-sectional view of a conventional fine crusher. 21...Lower housing, 22...Base, 23
... Supply port, 24a, 24b ... Support, 25 ...
Upper housing, 26...hole, 27...cover plate, 2
8...Discharge port, 29...Stator, 29a, 29b
... Segment, 30 ... Hinge, 31 ... Convex portion, 32 ... Rotating shaft, 32a, 32b ... Bearing,
33...rotor, 34...convex portion.

Claims (1)

[Scope of utility model registration request] A lower housing having a supply port is placed on a base, two pillars are set up on the base with the lower housing as the center of symmetry, an upper housing having a discharge port is placed on both pillars, and the lower housing is placed on the base. The stator interposed between the housing and the upper housing is radially
Each segment is separately hinged to the support, a hole is provided in the upper part of the upper housing with the same diameter as the inner diameter of the stator, and this hole is closed with a removable cover plate and supported on the rotating shaft. The rotor is inserted into the stator with a small gap, the bearing at the lower end of the rotating shaft is removably attached to the base, and the bearing at the upper end of the rotating shaft is attached to the cover plate. A fine grinder characterized by being attached.