JPH084114Y2 - Crusher equipped with a grinding medium replenishing device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crusher equipped with a stirring device and a crushing medium replenishing device. Further, the present invention is to pulverize a magnetic material such as minerals, pigments, dyes, chemicals, fillers, and ferrites, or an object to be treated such as ceramics, or disperse these fine particles to paints, printing inks, pigments. The present invention relates to a vertical crusher equipped with a stirring device and a crushing medium replenishing device suitable for preparing magnetic tape coating materials, rubbers, adhesives, cosmetics, ointments and the like. Further, the present invention relates to a grinding medium supply mechanism of a fine grinding machine using a grinding medium such as a sand mill, a sand grinder, a dyno mill, a pearl mill or an attrition mill.

[0002]

2. Description of the Related Art A fine pulverizing apparatus equipped with a stirrer and a pulverizing medium has a mean particle size of, for example, 0. By forcibly agitating beads and other grinding media consisting of hard particles of about 1 to 10 mm,
It is used in a wide range of fields such as paints, printing inks, pigments, dyes, resins, food chemicals, and ceramics because it can efficiently finely pulverize or disperse a substance to be treated such as minerals and pigments.

In a crusher equipped with such a stirrer and a crushing medium, the crushing medium is worn and consumed because the objects to be treated such as minerals and pigments are crushed or dispersed by the impact and grinding action of the crushing medium. And then reduce that amount
The pulverization and dispersion efficiency is reduced. Therefore, it is necessary to replenish the pulverizing medium, and the replenishing of the pulverizing medium is performed in the closed type pulverizer, especially during operation, by the pressure in the pulverizing container,
For example, because it must be done against the internal pressure of the mill,
Conventionally, the operation of the crusher is stopped and the crushing medium is replenished in the crushing container, for example, in the mill.

[0004]

When the operation of the crusher is stopped and the crushing medium is replenished in the crushing container as described above, it takes time to open and close the sealing structure, so that the operation time of the crusher is reduced. It is not efficient, and the slurry of the content flows out from the grinding medium supply port, and the surroundings are contaminated, which is a problem. Furthermore, in the case of 24-hour operation, it was troublesome that workers had to be arranged day and night.

Therefore, a method has been proposed in which a branch pipe with a hopper is provided in the slurry supply pipe of the material to be crushed and the crushing medium in the hopper is supplied together with the liquid into the crushing container by compressed air (for example, JP-B-59). -32188 publication,). However, when the grinding medium is replenished in this way, liquid and air are supplied together with the grinding medium into the grinding container, so that the slurry concentration in the grinding container becomes non-uniform, and
The slurry is temporarily extruded due to excessive pressure for press-fitting, the residence time in the pulverization container of the object to be treated such as minerals and pigments is not constant, and the pulverization and dispersion treatment is not uniform, The pulverization and dispersion efficiency is reduced.

Moreover, the air introduced into the crushing container is a small amount as a whole, but it is finely dispersed due to the disturbing action in the crushing container and adheres to the surface of the solid particles, so that the crushing medium, etc. As a result, the crushing and frictional action due to satisfactorily cannot be achieved, and this also causes a problem that the crushing and dispersion efficiency is lowered. DISCLOSURE OF THE INVENTION The present invention aims to solve the problems such as the outflow of slurry caused by the replenishment of a grinding medium and the reduction of the grinding and dispersion efficiency in a grinder having a stirring device and a grinding medium having a conventional stirring element. I am trying.

[0007]

DISCLOSURE OF THE INVENTION The present invention is capable of supplying a grinding medium into a grinding container without the use of compressed air and without backflow of the grinding medium, and in particular, automatically supplying into the grinding container. The present invention provides a crusher equipped with a stirrer and a crushing medium. That is, the present invention provides an inlet formed at a lower end for receiving a pressurized object to be processed, an outlet formed at an upper end and having a separation mechanism for separating the grinding medium and the grinding processing object, and an entrance for receiving the grinding medium. A tubular container, a shaft rotatably supported in the tubular container and extending in the longitudinal axis direction thereof, and fixed to the shaft at intervals in the longitudinal direction. In a vertical crusher equipped with a plurality of stirring elements, a drive device for rotationally driving the shaft, and a crushing medium replenishing device having a screw feeder with a hopper, an inlet for receiving the crushing medium in a cylindrical container is An inlet that is formed in the container wall located between the first stirring element and the second stirring element, which is counted below the outlet of the cylindrical container, and that receives the grinding medium of the cylindrical container. To the hopper Vertical grinder screw and the feeder are arranged in connection, in the screw feeder, characterized in that always communicates with the tubular container to obtain.

In the present invention, the stirring element is generally formed in a disc shape, but it may be formed in a screw shape, a blade shape, a rod shape, or a semicircular shape. Further, in order to promote the grinding action, an annular plate-shaped member or a plurality of pin-shaped members is formed on the side of the crushing container, and the plate-shaped member or the plurality of pin-shaped members provided on the rotating shaft are provided between them. You may be able to rotate with.

Further, in the present invention, the grinding medium is filled and maintained in the main body of the grinder, that is, the grinding container, and the movement thereof causes the effect of grinding and dispersion. Thus, the grinding medium is ground. In order to keep the grinding medium out in order to keep it in the area, a separating screen is provided near the outlet of the grinding container or a gap separator structure is formed. In the present invention, the grinding medium to be used has a particle size larger than that of the object to be treated such as minerals and pigments and the grinding product, and has a size that does not get caught in the gap between the screw of the screw feeder and the cylindrical cylinder. It's enough. Therefore, as the grinding medium in the present invention, for example, minerals such as natural or synthetic alumina and zirconia having a mean particle size of 0.3 mm or more, particularly 0.3 to 10 mm, fine sand, hard glass particles, Hard plastic microparticles and metal microparticles are used.

In the present invention, the screw feeder has a cylindrical cylinder having a screw and a hopper, and it is preferable that the screw feeder is formed so that a gap is not formed between the screw and the cylindrical cylinder. Thus, it is preferable to form a sleeve made of rubber, plastic or the like inside the cylinder in order to prevent a gap from being generated between the screw and the cylindrical cylinder.

In the present invention, it is preferable that the sealing member for sealing the opening end of the crushing container is formed so as to be detachable from the crushing container because cleaning such as washing is easy. However, particularly in the present invention, the bearing portion of the rotating shaft is provided on either the sealing member side or the crushing container bottom portion, but the sealing member or the bottom member having this rotating shaft bearing portion is detachable from the crushing container. It is preferable to provide the crushing container and the stirrer because the cleaning is easy.

[0012]

In the present invention, the agitating element and the second agitator located near the end of the crushed product outlet side of the crushing container, which is separated from the outlet, that is, the first stirring element located below the crushed product outlet. Since the screw feeder communicating with the hopper is opened at a position between the second stirring element and the stirring element, only the grinding medium in the hopper can be fed into the grinding container by operating the screw feeder. Since the slurry has a high viscosity in general, it is blocked by beads of the grinding medium and does not flow backward, but
Even if the viscosity of the slurry becomes low and a backflow occurs, the screw feeder for replenishing the grinding medium is provided near the slurry discharge port, so that the applied pressure is small and it does not overflow from the hopper.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings, but the present invention is not limited by these descriptions and examples. FIG. 1 is a schematic explanatory view showing a crushing container and a screw feeder for supplying a crushing medium, with a part thereof broken away, to explain one embodiment of the present invention by crushing a pigment. FIG. 2 is a schematic partial cross-sectional view showing a screw feeder and a connection portion of the screw feeder to a crushing container in another embodiment of the present invention with a part cut away.

The vessel 1 includes a side wall member 2 and a top wall member 3
The bottom wall member 4 is detachably fixed in a liquid-tight manner. A bearing 6 for a rotating shaft 5 is provided on the top wall member 3 of the vessel 1, and stirring disks 7 are fixed to the rotating shaft 5 in a plurality of stages. A pulley 8 is fixed to an end portion of the rotary shaft 5, and a belt 11 is hung on the fixed pulley 8 and a pulley 10 of a motor 9 so that the rotary shaft 5 is rotated by the rotation of the motor 9. Has become.

The side wall member 2 of the vessel 1 has a supply port 12 for the pigment of the object to be treated formed at the lower end, and an outlet 13 for the pulverized product or the dispersed product formed at the upper end.
The outlet 13 is provided with a bead separating mechanism. In this example, the separating screen 15 is provided with a separating screen 15.
3 is provided so as to cover the opening. However, instead of the separating screen 15, a gap separator structure may be used. Further, on the side wall member 2, 0 of the grinding medium is provided above, that is, at a position corresponding to between the first stirring disc 7 ′ from the top and the second stirring disc 7 ″ from the top. .5-3
A screw feeder 16 for replenishing beads of mm-sized glass beads 14 is opened. The screw feeder 16 is provided with a bead hopper 17.
It is rotatably provided in the cylinder 18. It is formed of a screw 19 and a driving device 20 of the screw 19.

Since this embodiment is constructed in this way, the beads 14 are supplied from the screw feeder 16 into the vessel 1 by the operation of the driving device 20. When the beads 14 are supplied in a predetermined amount, a slurry pigment is supplied into the vessel 1 from the pigment supply port 12 by the operation of a sand pump (not shown). When the slurry starts to be supplied, the motor 9 is operated to rapidly rotate the rotating disk.

The upward flow in the vessel 1 is kept constant, and the pulverized and dispersed pigment slurry is separated from the pulverizer medium by the separating mechanism and flows out from the outlet 13. When the bead of the grinding medium is partially consumed and the power consumption is reduced to a certain level or less, the operation of the sand pump is reduced, the drive device 20 is operated, and a certain amount of the bead 14 is put into the grinding container from the screw feeder. To replenish.
When the supply of the grinding medium beads is completed, the operation of the sand pump is returned to the original state and the grinding or dispersion is continued.

In the embodiment of FIG. 2, the vessel 21
The side wall portion 22 is formed into a double cylinder including an outer wall 23 and an inner wall 24, and a water cooling jacket 25 is provided between them. The screw feeder 26 is a cylinder 2
7 and the flange portion 30 of the opening 29 provided in the side wall portion 22 so that the screw holes 31 and 31 'are aligned with each other, and the flange portion 33 of the sleeve retainer 32 that expands in a taper shape on the extrusion side. It is fixed by a plurality of bolts 34 with the pinch in between.

A plastic sleeve 35 is formed inside the cylinder 27 of the screw feeder 26. The sleeve 35 is provided close to the tip of the screw blade 37 of the screw 36 provided inside the sleeve 35 so that no clearance is generated. Further, a bead hopper 39 is provided above the rear end 38 of the cylinder 27, and a screw shaft end 41 projects from a rear end opening 40 of the cylinder 27. The screw shaft end 41 is connected to the shaft 45 of the speed reducer 44 via the coupling 43 at the bearing 42. Coupling 4
3 is rotatably supported by the bearing portion 42 in a liquid-tight manner via a gland packing 46 and a packing retainer 47, and the reduction gear 44 is connected to a drive device 48.

Since this embodiment is constructed in this way, the beads 14 in the bead hopper 39 are carried by the movement of the screw blades 37. In this example, the beads 14 are supplied to a position corresponding to between the first stirring disc 7 ′ from the top and the second stirring disc 7 ″ from the top. The beads 14 can be pressed against the pressure in the vessel 21 by the action of the plate 7 ′ and the stirring disc 7 ″. Moreover, the beads 14 in the vessel 21 are
There was no reverse flow in the screw feeder 26, and neither was the slurry overflowing from the bead hopper 39.

[0021]

According to the present invention, the stirring element is located in the vicinity of the end of the crushing product outlet side of the crushing container, apart from the outlet, that is, the first stirring element located below the crushing product outlet. Since the screw feeder communicating with the hopper is opened at a position between the second and the second stirring element,
Under the action of the stirring element located at the first position and the stirring element located at the second position, it is detected that the grinding medium is exhausted, and the screw feeder is operated to bring a predetermined amount of the grinding medium into a grinding container. Can be replenished. Moreover, in the present invention, since the compressed air and the mixed liquid are not particularly required for the replenishment of the grinding medium, there is no problem due to the air cushion or the like, and the grinding and dispersion efficiency is improved as compared with the conventional apparatus. Further, the supply and stop of the grinding medium can be performed by starting and stopping a driving device such as a motor. Therefore, as compared with the conventional device, the structure of the crushing medium replenishing device becomes simpler and the replenishing operation can be automated easily. Therefore, the structural cost of the device is low and the workers are arranged day and night. It is not necessary and has many advantages such as improved pulverization efficiency.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing a crushing container and a screw feeder for supplying a crushing medium, with a part broken away, in order to explain one embodiment of the present invention by crushing a pigment as an example. .

FIG. 2 is a schematic partial cross-sectional view showing a screw feeder and a connection portion of the screw feeder to a crushing container in a further embodiment of the present invention with a part cut away.

[Explanation of reference numerals] 1, 21 Vessel 2 Side wall member 3 Top wall member 4 Bottom wall member 5 Rotating shaft 6 Bearing 7 Stirring disc 7'First stirrer disc 7'from above Second from top Second stirring disk 8, 10 Pulley 9 Motor 11 Belt 12 Pigment supply port 13 Grinding or dispersion product outlet 14 Beads 15 Bead supply port 16, 26 Screw feeder 17, 39 Bead hopper 18, 27 Cylinder 19 36 Screw 20 , 45 Drive device, 23 Outer wall 24 Inner wall 25 Cooling jacket 28 Cylinder flange part 29 Opening part 30 Flange part 31, 31 'Screw hole 32 Sleeve retainer 33 Flange part 34 Bolt 35 Sleeve 37 Screw blade 41 Screw shaft end 42 Bearing part 43 Coupling 44 Reducer

Claims (1)

[Scope of utility model registration request] 1. An inlet formed at a lower end for receiving a pressurized object to be treated, an outlet formed at an upper end, which has a separating mechanism for separating a grinding medium and a ground processing object, and an inlet for receiving a grinding medium. A cylindrical container having, a shaft rotatably supported in the cylindrical container and extending in the longitudinal axis direction thereof, and a plurality of shafts fixed to the shaft at intervals in the longitudinal direction. In a vertical crusher equipped with individual stirring elements, a drive device for rotationally driving the shaft, and a crushing medium replenishing device having a screw feeder with a hopper, an inlet for receiving the crushing medium in a cylindrical container is the cylinder. Formed in the container wall located between the first stirring element and the second stirring element, which is counted downward from the outlet of the shaped container, and at the inlet for receiving the grinding medium of the cylindrical container. Equipped with a hopper Screw feeder is connected and installed.
And the inside of the screw feeder is the cylindrical container.
A vertical crusher that is in continuous communication with the inside .