JPH0128827Y2 - - Google Patents

Description

[Detailed explanation of the idea]

<Industrial Applications> This invention consists of a grinding chamber for containing beads of sand or other fine particles, and typically an electric motor that applies intense stirring and shearing force to the beads in the chamber for grinding or other processing. It includes an agitator (stirring device) consisting of a desk and paddle blades that are rotated by
In use, the milled material is passed through the milling chamber;
This invention relates to a bead mill device for mixing this with beads and applying intense stirring and shearing force to perform crushing, polishing, dispersion, emulsification, homogenization, and similar treatments. <Prior Art> Bead mill devices have been known for a long time, and in the conventional device, a motor shaft and a stirring device shaft are connected by a coupling, and the stirring device is indirectly driven by the electric motor. <Problems to be solved by the invention> The conventional bead mill device described above requires a bearing to support the shaft of the stirring device in the grinding chamber, and a coupling to connect the shaft of the electric motor and the shaft of the stirring device. The whole thing becomes large and bulky. <Means for Solving the Problems> Therefore, the present invention includes a cylindrical housing having an inlet/outlet covered with a mesh sieve and partially filled with beads of 0.1 to 5.0 mm, and a cylindrical housing arranged concentrically within the cylindrical housing. In a bead mill device for pulverizing, mixing, diffusing, emulsifying, and homogenizing a fluid material, the device is equipped with a stirring device having a shaft equipped with a stirring member spaced apart in the axial direction, and an electric motor that rotationally drives the stirring device, The cylindrical housing 8 is provided with a collar on the open end face facing the electric motor, and the casing 3 of the electric motor is
is provided with a fixing flange 4, and the collar of the cylindrical housing is brought into contact with and coupled to the fixing flange 4 to fix the cylindrical housing to the casing of the motor, and the shaft of the motor protrudes concentrically from the fixing flange 4 of the casing 3. The stirring device is characterized in that the extension portion 6 of the stirrer is formed as a shaft of the stirring device. <Example> An example of this invention will be described below with reference to the drawings. The illustrated bead mill apparatus includes a vertically arranged electric motor 1 fixed to a mounting plate 2. The internal structure within the motor casing 3 is not relevant to this invention and will not be described. The motor casing has a circular fixed flange 4 with an annular upwardly directed mounting rim 5 on its upper surface. The shaft of the motor 1 is provided with an extension 6 which projects upwardly through the fixed flange 4 into a grinding chamber 7 surrounded by a cylindrical housing 8 . The length of the extension 6 projecting upward from the fixed flange 4 is approximately equal to the axial length of the grinding chamber 7, ie the height of the grinding chamber in this embodiment. As shown in the figure, the cylindrical housing 8 can be arranged vertically and concentrically with the motor casing 3 to form a compact and convenient integrated unit that can be easily installed, but of course it can be arranged in other ways than vertically. . Impeller disks 9 are attached to the entire length of the extension 6 of the motor shaft at approximately equal intervals in the axial direction. The cylindrical housing 8 has an inlet 10 for the ground material in the part adjacent to the fixed flange 4 and an outlet 11 for the ground product in its upper end plate 22 . The cylindrical housing 8 is surrounded by a cooling jacket 12 having an inlet 13 and an outlet 14 for cooling water. The fixed flange 4 of the motor casing is provided with an annular groove 17 that engages with the rim 5, and a contact plate 15 for closing the grinding chamber is fixed in contact with a screw 16,
The cylindrical housing 8 has a collar on the open end surface with a screw 16.
It is attached to the fixed flange 4 via a contact plate by a. The plate 15 has a cylindrical stem 1 with a lid 18a.
8 is attached to form a seal housing 19 for a suitable shaft seal (not shown) for sealing the base of the motor shaft extension 6. Toban 15
A hole may be provided in the hole to allow the sealing liquid to flow out. The opening of the circular recess 21 in the upper end plate 22 is covered with a mesh sieve 20, and the outlet 11 for the crushed product is provided on the upper wall of the recess, or the annular recess is provided in the backing plate 15 and covered with the mesh sieve. Port 1 provided on the upper end plate
The material may be put in from 1 and taken out from the opening provided behind the sieve of the plate 15. In use, the grinding chamber is partially filled with sand or other beads having a diameter of about 0.1 to 5 mm, and the grinding material and liquid are communicated through appropriate inlets and outlets. By rotating the shaft of the electric motor, the impeller disks 9 installed at regular intervals in the axial direction along the entire length of the extension 6 of the shaft that protrudes into the grinding chamber give intense agitation to the beads and the crushed material at each position in the grinding chamber 7. Apply shear force.
A mesh sieve 20 prevents beads from escaping. As a result, the pulverized material is supplied with liquid from the inlet to the pulverizing chamber, and until it reaches the outlet, it is homogenized by the strong stirring of the stirring device that rotates in various parts of the pulverizing chamber, along with the beads held in the chamber, and by the shear force. It is finely pulverized and continues to be subjected to particularly strong shearing forces, so it is contained in the liquid flowing out from the outlet with a uniform concentration distribution. In the case of a vertical arrangement with the axis of the motor facing upward as in this embodiment, the beads are stationary and deposited on the backing plate when starting the operation. Therefore, the beads impose a large strain on the motor during starting, but this strain is transmitted to the shaft from the base closest to the motor, rather than from the far end (free end) of the extension of the shaft that enters the grinding chamber. As the beads are absorbed, powerful stirring and crushing begin immediately with the movement of the beads. Furthermore, when removing the upper end plate 22 to inspect the beads or replace the mesh sieve 20 if necessary, the upper end plate can be removed without spilling beads compared to the horizontal type. Typical speeds for commercially available electric motors are 3000, 1500,
1000, 750RPM. The peripheral speed of the agitator in this type of grinder operates effectively at 10 to 20 m/sec, but for very viscous materials lower speeds are required, which reduces the diameter of the agitator. Alternatively, this can be addressed by choosing a slower motor. Representative embodiments of the bead mill device according to the present invention, preferred dimensions of each part, and other specifications are shown in the table below.

【table】

[Table] <Effects of the invention> According to the invention, the flange at the open end of the cylindrical housing surrounding the grinding chamber is connected to the fixed flange of the casing of the electric motor, and the extension of the shaft of the electric motor protruding from the flange is connected to the stirring device. Since the shaft of the electric motor and the grinding chamber vibrate as one, vibration of the motor shaft can be kept to a minimum, and as a result,
The pulverized material can be made into a finely pulverized product with uniform particle size, the seals have less wear and tear and can be used for a long time, and the entire device can be made smaller. Furthermore, there is no need for a bearing to support the shaft of the stirring device in the grinding chamber or a coupling for connecting the shaft of the electric motor and the shaft of the stirring device, which is advantageous in terms of cost.

[Brief explanation of drawings]

The drawing is a front view of an embodiment of the bead mill device according to this invention, showing the crushing chamber in cross section. indicates the grinding chamber, 8 its cylindrical housing, and 9 the desk of the stirring device.

Claims (1)

[Scope of claims for utility model registration] (1) Having an entrance covered with a mesh sieve, and 0.1
A cylindrical housing partially filled with ~5.0 mm beads, a stirring device having a shaft disposed concentrically within the cylindrical housing and having a stirring member attached axially apart, and an electric motor that rotationally drives the stirring device. In the bead mill device, which crushes, mixes, diffuses, emulsifies, and homogenizes fluid materials, the cylindrical housing 8 is provided with a flange on the open end face facing the electric motor, and is fixed to the casing 3 of the electric motor. A flange 4 is provided, the collar of the cylindrical housing is brought into contact with and coupled to the fixing flange 4 to fix the cylindrical housing to the casing of the electric motor, and an extension of the shaft of the electric motor concentrically protrudes from the fixing flange 4 of the casing 3. 6 is a shaft of the stirring device. (2) Utility Model Registration In the bead mill device according to claim 1, the cylindrical housing 8 has a stop plate 15 attached to the fixed flange 4 of the motor casing 3 with screws, and the above-mentioned stop plate has a hollow A bead mill device equipped with a cylindrical seal housing 19. (3) Utility model registration The bead mill device according to claim 2, wherein the collar of the cylindrical housing 8 and the contact plate 15 are fixed to the fixing flange 4 of the casing of the electric motor with screws. (4) In the bead mill device according to claim 2 of the new utility registration claim, the contact plate 15 is connected to the fixed flange 4.
A bead mill device comprising a concentric annular groove 17 that fits into an annular rim 5 formed in the bead mill. (5) In the bead mill device set forth in claim 1 of the new utility registration claim, fixing flanges are provided at both ends of the casing of the electric motor, and an extension of the shaft of the electric motor is protruded from both of the fixing flanges, and each of the fixing flanges A bead mill device in which the flange on the open end of a cylindrical housing is fixed.