JPH08978Y2 - Mixer - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a mixer used in the fields of chemistry, medicine, food industry, etc., and in particular, a rotary shaft is penetrated from the center of the bottom of the mixing tank. The present invention relates to a mixer having a stirring blade arranged at the bottom of a tank.

[Conventional technology]

A mixer that mixes powders by rotating a stirring blade placed at the bottom of the mixing tank at high speed is used for mixing, dispersing, granulation, spherical granulation, powder coating granulation, masking coat, emulsification, paste. Since it can perform various mixing processes such as kneading, it has been widely used in the fields of chemistry, medicine, food industry and the like in recent years.

These mixers, as illustrated in FIG.
A stirring blade 32 is attached to the upper end of a rotary shaft 33 that penetrates through the central portion of the bottom wall 31a of 31 and projects into the mixing tank 31, and is rotated by a drive device 34 arranged below the mixing tank 31. The stirring blade 32 is configured to rotate at a high speed through the shaft 33 to perform the mixing process. Normally, the stirring blade 32 is arranged close to the bottom surface of the mixing tank 31 in terms of its mixing effect.

Further, as shown in the figure, a crushing blade that is rotatably driven by another drive device 36 on the side wall of the mixing tank 31 to promote crushing and granulation.
There are many examples where 35 is arranged.

In addition, in each of the above fields using these mixers, a single device often mix-processes a wide variety of products, and in this case, the mixing tank should be cleaned after each mixing process is completed. It is done to prevent pollution between each variety.

[Problems to be solved by the device]

However, in these mixers, the stirring blades are arranged close to the bottom surface of the mixing tank, and therefore, between the stirring blades and the mixing tank bottom surface, the back surface of the stirring blades, or the shaft sealing portion of the rotary shaft bottom wall penetrating portion. It is difficult to clean the above, and therefore, at the time of cleaning, a complicated and time-consuming procedure of disassembling the stirring blade, taking it out of the tank, and cleaning each of these parts is required.

The present invention has been made to solve the above-mentioned problems in the conventional device, and can clean the inside of the mixing tank without disassembling the stirring blade and taking it out of the tank, shortening the required time and smoothly processing products. It is an object of the present invention to provide a mixer which can be changed and thus can improve its operation efficiency and productivity.

[Means for solving the problem]

In order to achieve the above object, the present invention has the following configuration.

That is, the mixer according to the present invention is equipped with a mixing tank, a rotary shaft that penetrates through a central portion of a bottom wall of the mixing tank and has an upper end protruding into the mixing tank, and is mounted on an upper end of the rotary shaft. A mixing machine comprising a stirring blade arranged in the vicinity of the bottom surface of the mixing tank, and a drive device arranged below the mixing tank and having a lower end portion of a rotating shaft connected thereto. The bearing box is attached to the intermediate beam of the bearing box, and the rotating shaft is slidably inserted in the inner sleeve of the bearing box to support the load applied to the rotating shaft in the normal state, and the bearing box and the drive device are The shaft lifting means connected to the rotating shaft between the bearing and the bearing attached to the rotating shaft, the intermediate portion is rotatably connected to the bearing via the pin shaft,
One end is connected to the lower end of a support member suspended from an intermediate beam so that it can pivot and laterally move, and the other end is rotated around the piston end of a cylinder that is swingably erected on the bottom of the machine base. It is provided with a shaft elevating arm movably connected to each other, and a lower end portion of the rotary shaft and a connecting portion of the drive device are slidable in an axial direction within a predetermined range.

[Action]

In the above-mentioned device of the present invention, the rotating shaft, which penetrates through the central portion of the bottom wall of the mixing tank and projects the upper end into the mixing tank, is attached to the inner sleeve of the bearing box attached to the intermediate beam of the machine base below the mixing tank. It is slidably inserted in the axial direction, supports the load applied to the rotating shaft in the normal state, and rotates without runout. When cleaning the inside of the mixing tank, the rotary shaft rises without any runout when it is lifted by the shaft lifting means connected to the rotary shaft between the bearing box and the drive unit, and the stirring blade and the bottom of the tank mounted on the upper end of the rotary shaft It is possible to widen the interval between and to a gap that can be washed without disassembling the stirring blade and taking it out of the tank.

In addition, since the rotating shaft with the stirring blade attached can be raised without disconnecting the connection with the drive unit, returning to the original state after cleaning can be done easily and automatically without depending on human power. Can be done.

〔Example〕

 First Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a partially longitudinal front view showing the mixer of this embodiment.

In FIG. 1, 1 is a mixing tank, and this mixing tank 1
Is formed in a cylindrical container and includes a main motor 11 and the main motor 11.
It is arranged on a machine base 10 accommodating a speed reducer 12 directly connected to 11, and an upper lid 1a that can be opened and closed is provided on an upper portion thereof, and an openable dump lid 1b is provided on a lower portion of a peripheral wall. Also, the upper lid 1a
An inlet and an inspection port are provided in.

2 is a stirring blade, and this stirring blade 2 has three blades, and is attached to an upper end portion of a rotating shaft 3 which is provided so as to penetrate the center portion of the bottom wall of the mixing tank 1. It is arranged close to the inner bottom surface of the mixing tank 1.

Here, the rotating shaft 3 is an intermediate beam of the machine base 10 below the mixing tank 1.
The inner sleeve 5a of the bearing box 5 attached to the shaft 10a is slidably inserted in the axial direction to support the load applied to the rotary shaft 3 in a normal state, and the lower end 3a is directly connected to the main motor 11 to reduce the speed. Machine
It is connected to 12 output shafts via a connecting flange 6.
It is driven to rotate by the main motor 11 and rotates without center deviation.

Further, the lower end portion 3a of the rotary shaft 3 is connected to the connecting flange 6 in a spline configuration so as to be movable in the axial direction.

Further, the tank bottom wall penetrating portion of the rotary shaft 3 is axially slidably sealed by a shaft sealing box 4 provided in the penetrating portion of the mixing tank 1 bottom wall. On the other hand, the inside of the shaft-sealing box 4 is communicated with a compressed air supply means (not shown here) through the ventilation hole 4a, and during the mixing operation, the interior of the shaft-sealing box 4 is air-purged to seal the shaft 3 of the rotary shaft 3. It is configured to ensure.

The rotating shaft 3 is rotatably connected to an intermediate portion of a shaft elevating arm 8 via a bearing 7 at an intermediate portion between the bearing box 5 and the connecting flange 6.

This axis lifting arm 8 has one end part which is an intermediate beam of the machine base 10.
The lower end of a supporting member 10b suspended on 10a is pivotally and laterally movably connected to the other end, and the other end is rotated to the piston end of a cylinder 9 vertically oscillated on the bottom of the machine base 10. It is movably connected to the bearing 7 and is rotatably connected to the bearing 7 via a pin shaft perpendicular to the plane of the drawing (not shown). The rotation shaft 3 is rotated as shown in FIG.

On the other hand, 14 is a motor with a speed reducer, and this motor with a speed reducer 14 is arranged on the machine base 10 on the side of the mixing tank 1, and its output shaft penetrates the side wall of the mixing tank 1. It is projected into the mixing tank 1.

Reference numeral 13 denotes a crushing blade, which is attached to an output shaft end of a motor 14 with a speed reducer, is arranged on a side wall portion in the mixing tank 1, and is rotationally driven by the motor 14 with a speed reducer to mix. It is supposed to promote the crushing of lumps and agglomerated powder generated inside.

In the mixer of the present embodiment having the above configuration, when cleaning the inside of the mixing tank, the cylinder 9 is operated to raise the rotating shaft 3 so that the stirring blade 2 mounted on the upper end of Since it is possible to increase the distance from the reference position shown by the solid line to the upper position shown by the chain double-dashed line in the figure to increase the distance between the mixing tank 1 and the bottom surface, the stirring blade 2 is disassembled to the outside of the tank. Mixing tank 1 without the complicated procedure of taking it out.
The inside can be easily washed, and the number of steps required for the washing can be greatly reduced.

Further, the rotary shaft 3 is provided below the mixing tank 1 with the intermediate beam 10 of the machine base 10.
It is inserted in the inner sleeve 5a of the bearing box 5 attached to a in a freely slidable manner in the axial direction and supports the load applied to the rotary shaft 3 in the normal state, so that it rotates without center runout and It can be raised and the return to the operation ready state after cleaning can be automatically performed only by the operation of the cylinder 9, and before and after cleaning, the stirring blade 2 is disassembled and re-assembled in the narrow mixing tank 1. Compared with a conventional mixer that needs to be assembled, the time required for cleaning can be greatly shortened, the type of processing can be changed smoothly, and its operating efficiency and productivity can be improved.

Second Embodiment FIG. 2 is a partially longitudinal front view showing the mixer of this embodiment.

Note that this embodiment is the same as the first embodiment except that the configuration of the connection between the rotary shaft and its shaft support and shaft elevating means is different, and those equivalent to FIG. 1 are designated by the same reference numerals. The explanation will be omitted and the difference will be summarized.

In the mixer of this embodiment, the rotating shaft 15 on which the stirring blade 2 is mounted
Are inserted in the hollow transmission shaft 16. Also, this rotation axis
15 is a long groove 16a provided in the axial direction of the inner surface of the hollow transmission shaft 16.
It is engaged with the two round keys 17 and is rotated together with the hollow transmission shaft 16, but is slidable in the axial direction.

The hollow drive shaft 16 is inserted into a bearing box 20 suspended from an upper beam 10c of the machine base 10 and is rotatably held, and a V-groove belt 21 attached to a lower end portion thereof is indicated by a broken line in the figure. A speed reducer 12 directly connected to the main motor 11 via a V-belt schematically indicated by
Is connected to the output shaft of, and is rotationally driven by the main motor 11 to transmit the rotation to the rotary shaft 15.

Further, the tank bottom wall penetrating portion of the hollow drive shaft 16 is sealed by a shaft sealing box 18 provided in the shaft penetrating portion of the mixing tank 1 bottom wall.
The shaft-sealing box 18 has a conventional shaft-sealing configuration in which seal rings are inserted in multiple stages. Also, the hollow drive shaft 16
A seal ring 19 is fitted on the upper end surface of the shaft, and the seal ring 19 is attached to the lower surface of the boss portion of the stirring blade 2 and the hollow drive shaft.
16 Seal between the upper edge.

On the other hand, the rotary shaft 15 movably inserted in the hollow drive shaft 16 in the axial direction has its lower end through a bearing 23 at the piston upper end portion of a cylinder 22 erected on the bottom of the lower machine base 10. Is freely rotatably connected and supported, and is moved up by the operation of the cylinder 22 and is attached to the upper end of the stirring blade 2.
Is raised from the reference position shown by the solid line in the figure to the upper position shown by the chain double-dashed line in the figure.

With the mixer of the present embodiment described above, it is possible to obtain the same effect as that of the first embodiment described above with a relatively compact configuration.

In the example shown in FIG. 1 and FIG. 2, a crushing blade that promotes crushing of lumps and agglomerated powder is arranged on the side wall of the mixing tank, but this is an example, and the crushing blade is not provided. It goes without saying that the same effect can be obtained for objects.

[Effects of the Invention] As described above, the mixer according to the present invention is capable of rotating a rotating shaft equipped with a stirring blade on the rotating shaft without center swing and raising the rotating shaft. At the time of cleaning, the stirring blade can be raised to increase the gap between the mixing tank and the bottom surface of the mixing tank, so that the inside of the mixing tank can be easily cleaned without disassembling the stirring blade and taking it out of the tank. Compared with the conventional mixer that requires disassembling and reassembling the stirring blade in a narrow mixing tank, the cleaning time can be greatly shortened and the processing type can be changed smoothly. , Its operating efficiency and productivity can be increased.

In addition, since the load applied to the rotating shaft in the normal state is supported by the bearing box below the mixing tank and does not apply a pressure load to the tank bottom wall penetrating portion of the rotating shaft, it is provided in the rotating shaft tank bottom wall penetrating portion. The shaft sealing part can be simplified, and the cleaning of the mixing tank including this shaft sealing part is further facilitated.

[Brief description of drawings]

FIG. 1 is a partially longitudinal front view of a mixer according to the first embodiment of the present invention, FIG. 2 is a partially longitudinal front view of a mixer according to the second embodiment of the present invention, and FIG. 3 is a conventional mixer. FIG. 1 ... Mixing tank, 2 ... Stirring blade, 3 ... Rotating shaft, 6 ... Connecting flange, 7 ... Bearing, 8 ... Shaft lifting arm,
9 …… Cylinder, 10 …… Machine stand, 11 …… Main motor, 12 ……
Decelerator.

Claims (1)

[Scope of utility model registration request] 1. A mixing tank, a rotating shaft that penetrates through a central portion of a bottom wall of the mixing tank and has an upper end protruding into the mixing tank, and is attached to an upper end of the rotating shaft and is attached to a bottom surface of the mixing tank. In a mixer including stirring blades arranged in close proximity to each other and a drive device arranged below the mixing tank and having a lower end portion of a rotary shaft connected thereto, a bearing is mounted on an intermediate beam of a machine base below the mixing tank. The box is attached, and the rotating shaft is slidably inserted in the inner sleeve of the bearing box to support the load applied to the rotating shaft in the normal state, and the rotating shaft is provided between the bearing box and the drive unit. The shaft elevating means connected to the rotary shaft is connected to the bearing attached to the rotary shaft and the intermediate part rotatably connected to the bearing via the pin shaft, and one end is rotated to the lower end of the support member suspended from the intermediate beam. End of the cylinder that is connected vertically and laterally so that the other end is swingably erected on the bottom of the machine base. Comprising a shaft lifting arm which is pivotably connected, mixer, characterized in that slidably configured in the axial direction within a predetermined range the connecting portion of the lower end portion and the drive of the rotating shaft.