JPH07178332A - Agitator - Google Patents

Abstract

PURPOSE:To mitigate an abnormal load generated by the detention of a solid between an impeller and an agitated tank in operation. CONSTITUTION:This agitator for agitating the inside of a tank is formed by fixing impellers 4a and 4b to the agitating shafts 2 and 3 inserted into an agitated tank 1. The agitator consists of the agitating shaft 2 connected to a driving device 7 provided above the tank 1, the agitating shaft 3 having the impeller 4b furnished at the lower part in the tank 1 and an elastic connecting member 5 for connecting the shafts 2 and 3 movably in the axial direction and suppressing the movement of the shafts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stirrer, and more particularly to a stirrer suitable for stirring a solid material as a raw material.

[0002]

2. Description of the Related Art A conventional stirring device is disclosed in Japanese Patent Publication No. 2-3341.
As described in Japanese Patent Publication No. 2, a sleeve having stirring blades attached to the lower portion of the stirring shaft is fitted, and a screw provided on the inner circumference of the sleeve and a screw provided on the outer circumference of the stirring shaft are screwed together, so that the stirring shaft can be stopped when the operation is stopped. By rotating the sleeve, the sleeve was moved in the axial direction to change the mounting position of the stirring blade from the outside of the stirring layer, and the sleeve and the stirring shaft were fixed during operation.

[0003]

In the above-mentioned prior art, it was possible to change the position of the stirring blade only when the operation was stopped. However, solid matter or the like is caught between the stirring blade and the stirring tank during the operation. No consideration is given to trouble. Due to this trouble, problems such as deformation of the stirring blade and stirring shaft, or damage to the stirring tank, shaft sealing device, and drive device occurred. In addition, the operation was stopped each time, and the worker disassembled the stirring device to remove the bitten solid matter, and inspected each device.

It is an object of the present invention to provide a stirring device which can alleviate an abnormal load on the stirring blade and the stirring shaft caused by the above trouble.

[0005]

In order to achieve the above object, in a stirrer which stirs the inside of a stirrer by attaching a stirrer to the stirrer inserted in the stirrer, the stirrer is installed above the stirrer. A first shaft connected to a drive device provided,
A second shaft having a stirring blade provided in the lower portion of the stirring tank, and a connecting member having an elastic body that connects the second shaft to the first shaft so as to be movable in the axial direction and suppresses the movement amount It is composed.

[0006]

In the stirring of the solid matter, when the solid matter is caught between the stirring blade and the stirring tank, friction causes an excessive load on the stirring blade and the stirring shaft. However, the lower stirring shaft moves upward along the key groove in the connecting member, and the elastic body contracts to absorb the load. After the solid material bitten by the inertial force of stirring is removed, the lower stirring shaft returns to its original position by utilizing the restoring force of the contracted elastic body.

[0007]

Embodiments of the present invention will be described with reference to FIGS.

FIG. 1 shows the structure of the stirring apparatus of the present invention.
A stirring shaft 2 is provided above the stirring tank 1 via a shaft sealing device 6,
A stirring blade 4a is attached to the stirring shaft 2. on the other hand,
A stirring shaft 3 is provided below the stirring shaft 2 via a connecting member 5,
A stirring blade 4b is attached to the stirring shaft 3. The drive device 7 is installed above the stirring tank 1 and is connected to the stirring shaft 2 via a shaft joint 8. A gap 16 is provided between the stirring blade 4b and the bottom of the stirring tank 1. In addition, the stirring shaft 2 has a vent hole 18
Is provided to connect the inside of the connecting member 5 and the outside of the stirring tank 1.

FIG. 2 shows details of the connecting member 5 shown in FIG. The stirring shaft 2 and the stirring shaft 3 are connected by fitting a key 11 provided at the lower end of the stirring shaft 2 into a key groove 12 provided at the upper end of the stirring shaft 3, and the stirring shaft 2 in the connecting member 5 is connected. An elastic body 10 is provided between the lower end and the upper end of the stirring shaft 3. The connecting member 5 is covered with a cover 19, and the cover 1
9 is sealed by a packing 9 provided between the stirring shafts 2 and 3. A fixing bolt 13 is provided above the cover 19 to fix the cover 19 and the stirring shaft 2. Further, a stopper 14 is attached to the lower part of the cover 19, and a stopper groove 15 is provided on the upper part of the stirring shaft 3 to restrict the movement amount of the stirring shaft 3.

Next, the operation of the apparatus configured as described above will be described. Normally, rotation is from the drive unit 7 to the shaft coupling 8
Is transmitted to the stirring shaft 2 and the stirring shaft 3 via the stirring blade 4a,
Stirring is carried out by 4b. When the solid 17 is caught in the gap 16 between the stirring blade 4b and the stirring tank 1 during stirring, the stirring shaft 3 moves upward due to the relationship between the key 11 and the key groove 12, and the elastic body 10 contracts. Absorb the load. At that time, the compressed air inside the cover 19 is discharged to the outside of the stirring tank 1 through the ventilation hole 18. After the solid matter 17 is removed from the gap 16 by the inertial force of stirring, the stirring shaft 3 is returned to the lower side by the restoring force of the elastic body 10, and the stopper 14 is positioned above the stopper groove 15 as shown in FIG. It stops at the point of contact.

As a result, the abnormal load generated in the stirring blade 4b and the stirring shaft 3 is absorbed and relaxed by the connecting member 5, and the stirring blade 4b and the stirring shaft 3 are prevented from being deformed and the shaft sealing device 6 and the drive device 7 are prevented from being damaged. Therefore, the durability of each device is improved.
In addition, the solid material 17 caught between the stirring blade 4b and the stirring tank 1
Since it is not necessary to remove it, there is no need to stop the operation and disassemble and check, and the operability of the stirring device is improved.

[0012]

EFFECTS OF THE INVENTION According to the present invention, when solid matter is caught in the gap between the stirring blade and the stirring tank, the stirring shaft moves upward so that the solid matter can be easily removed. The effect that the abnormal load on the shaft can be reduced can be obtained.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of a stirring device according to the present invention.

FIG. 2 is a detailed vertical sectional view showing an embodiment of a connecting member of the stirring device according to the present invention.

[Explanation of symbols]

1 ... Stirring tank, 2, 3 ... Stirring shaft, 4a, 4b ... Stirring blade, 5
... connecting member, 6 ... shaft sealing device, 7 ... drive device, 8 ... shaft coupling, 10 ... elastic body, 11 ... key, 12 ... keyway, 14 ...
Stopper, 15 ... Stopper groove, 16 ... Gap between stirring blade 4b and stirring tank 1, 17 ... Solid matter, 18 ... Vent hole.

Claims (1)

[Claims] 1. A stirrer for stirring the inside of a stirrer by attaching a stirrer to a stirrer shaft inserted in the stirrer, wherein the stirrer shaft is connected to a drive device provided above the stirrer tank. A shaft, a second shaft provided in a lower portion in the stirring tank, and a connection having an elastic body that connects the second shaft to the first shaft so as to be movable in the axial direction and suppresses the movement amount. A stirrer comprising a member.