JP2575151Y2 - Mixing device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixing apparatus for applying a dust-proof treatment to dust-producing powders such as cement and lime which generate a large amount of dust.

[0002]

2. Description of the Related Art Powders such as cement and lime are easily blown off by the wind and deteriorate workability. Therefore, the powder and a heat-soluble synthetic resin (for example, polytetrafluoroethylene) are stirred and mixed while being heated. Thereby, dust generation of the powder can be prevented. The following is a conventional example of a mixing apparatus that stirs and mixes such a powder and a synthetic resin.

[0003] That is, a pair of shafts are freely rotatably mounted on the upper open case, and a number of blades for stirring and mixing are mounted on these shafts. A plate-like upper lid is attached to the upper wall of the case. Then, for example, the powder and the synthetic resin are stirred and mixed while being conveyed in one direction by a blade, so that the synthetic resin is dissolved in a fibrous form and the powder is captured so that dust generation of the powder can be prevented. I have.

[0004]

By the way, when a predetermined compressive shearing force is applied to the powder and the synthetic resin when the powder and the synthetic resin are agitated and mixed, fiberization of the synthetic resin is promoted, and the dust-proof property of the powder is reduced. Can be enhanced. However, in the conventional mixing apparatus, a hollow space is formed in the upper part of the case in order to improve the fluidity of the material in the case. For this reason, at the time of stirring and mixing, the powder and the synthetic resin are scattered and escape upward, and a predetermined compressive shearing force cannot be applied to them, so that the dust protection of the powder cannot be sufficiently performed and a sufficient dust protection effect cannot be secured. There is a problem that. It is also conceivable to increase the dust-proofing property by increasing the stirring and mixing time.However, in this method, if stirring and mixing are repeated continuously for a long time, the water for the hydration reaction hardens and reacts with cement, not with quicklime. This causes problems in manufacturing.

The present invention has been made in view of such a situation, and an object of the present invention is to provide a mixing apparatus which can sufficiently ensure dustproofness of powder and can perform a large amount of mixing processing.

[0006]

SUMMARY OF THE INVENTION Therefore, the present invention provides a mixing apparatus for stirring and mixing a powder and a heat-soluble synthetic resin in a predetermined high-temperature atmosphere, which has an inlet and an outlet.
The powder and heat can be transferred to the charging port side in a sealed cylindrical case.
Rotated to extrude a mixture with soluble synthetic resin
The mixture provided with a blade for extrusion, discharge in the cylindrical case
Stirring driven to rotate and mix the mixture on the outlet side
Providing mixing blades, provided at the outlet of the cylindrical case
A regulating member for regulating the movement of the mixture
Direction of the mixture extruded by the blades for extrusion
And the rotational speed of the stirring and mixing blades
The mixture was subjected to compressive shear .

[0007]

In this way, the powder and the heat-soluble synthetic resin are conveyed in a substantially constant direction while being stirred and mixed, and the movement of the mixture is regulated so that a predetermined compressive shearing force is applied to the mixture. Thus, sufficient dustproofing treatment can be performed on the powder.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment of the present invention. In the figure, a cylindrical case 1 has an inlet 2 and an outlet 3 and the other parts are sealed. A shaft 4 is rotatably mounted on the inlet side of the case 1, and a blade 5 for extruding a mixture is spirally mounted on the shaft 4. The shaft 4 is driven to rotate by a motor 6.

A shaft 7 is provided on the discharge port side of the case 1.
Are rotatably mounted, and a large number of stirring / mixing blades 8 are mounted on the shaft 7 at predetermined intervals. These blades 8 are arranged spirally on the shaft 7 so as to convey the mixture along the shaft 7 to the left in the figure. The shaft 7 is driven to rotate by a motor 9. Here, the shaft 7, the stirring / mixing blade 8, and the motor 9 constitute a stirring / mixing device main body.

[0010] A plate-like lid 1 is provided on the discharge port side of the case 1.
The cover 10 is urged toward the opening by the elastic force of the spring 11. Next, the operation will be described. In this embodiment, cement will be described as an example of the powder, and polytetrafluoroethylene will be described as an example of the heat-soluble synthetic resin. Also,
There are calcined lime and water as substances that form the inside of the case 1 into a high-temperature atmosphere. The polytetrafluoroethylene is introduced into the case 1 by being mixed with the water.

First, calcined lime and water are mixed with polytetrafluoroethylene in advance to generate heat (for example, 80 ° C. to 20 ° C.).
(0 ° C.) and then put them into the case 1 through the inlet 2, while putting cement into the case 1 through the inlet 2. Then, the supplied cement and polytetrafluoroethylene are conveyed toward the mixing blade 8 while being mixed by the extrusion blade 5. Then, the cement and the polytetrafluoroethylene are conveyed to the left in the figure while stirring and mixing the cement and the polytetrafluoroethylene by the mixing blade 8. At this time, the polytetrafluoroethylene is melted by heat to be converted into a web-like fibrous shape, and the fibrous portion captures the cement. As a result, the cement is restrained by the fibrous portion, so that the dust of the cement can be prevented.

Further, since the opening on the discharge port 3 side of the case 1 is closed at a predetermined pressure by the lid 10, the mixture of cement and polytetrafluoroethylene is restricted from moving to the left in the figure. The mixture is stirred and mixed while remaining in the case 1. In addition, since the mixture is sequentially supplied by the extrusion blades 5 during the stay, the mixture stays in the case 1 in a large amount.

For this reason, the mixture is scattered in the case 1.
The mixing blade 8 can sufficiently stir and mix without mixing, and a predetermined compressive shearing force can be applied to the mixture due to a speed difference between the flow direction of the mixture (the extending direction of the shaft 6) and the rotation direction of the mixing blade 8. . This promotes fiberization of polytetrafluoroethylene, so that a large amount of dust-proofing treatment of cement can be effectively performed.

When the amount of the mixture in the case 1 becomes large and its discharging force overcomes the urging force of the spring 11, the lid 10 moves to the left in the figure, and the mixture is discharged from the discharging port 3. You. FIG. 2 shows a second embodiment of the present invention. Since the main body of the mixing apparatus is the same as that of the first embodiment, the description is omitted.

In this embodiment, the mixing of cement and polytetrafluoroethylene is performed continuously. That is, an opening 22 is formed at the upper end of one end of the case 21 of the mixing device, and cement is fed into the case 21 from the cement hopper 23 through the screw feeder 24 through the opening 22.
Is transported and supplied. The screw feeder 24 is driven by a motor 25.

An opening 2 is provided at the upper end of one end of the case 21.
6 are formed, and a premixer 27 is
Supplies a mixture of quicklime and water (containing polytetrafluoroethylene). The premixer 27 includes a motor 28
And supplies the mixture into the case 21 while stirring and mixing the mixture. Quicklime is conveyed and supplied to the premixer 27 by a screw feeder 30 from a quicklime popper 29. In addition, a water storage tank 31 is provided,
Water is supplied from the water storage tank 31 to the nozzle 33 by the water pump 32, and sprayed and supplied from the nozzle 33 to the premixer 27. Here, when water is supplied to quicklime, it reacts and generates heat and rises to a predetermined temperature.

According to this configuration, since cement and the like can be continuously supplied to the mixing device, a large amount of cement can be efficiently treated with dust. As a specific example of a substance that generates heat during the reaction, there is a substance in which a reaction between two kinds of substances that generate heat by reacting with each other is a hydration reaction. As one of these substances, for example, an alkaline earth metal oxide, an alkaline earth metal peroxide, calcium carbide, lime phosphide, calcium aluminate, calcium silicate, a hydration reaction substance such as gypsum, or a mixture thereof, A combination using water or an aqueous solution as the other substance is conceivable. Further, a pressure sensor, a hydraulic cylinder, or the like may be used as the lid opening / closing device.

[0018] The present invention, as described above, are tightly closed
Powder and heat-soluble synthetic resin
For extruding a mixture that is rotationally driven to extrude a mixture with
And mix the mixture on the outlet side with stirring.
A stirring and mixing blade that is driven to rotate to provide
Conveying in almost constant direction while stirring and mixing with heat-soluble synthetic resin
And restrict the movement of those mixtures at the outlet side
So that a predetermined compressive shearing force is applied to the mixture.
Thus, the dustproofness of the powder can be sufficiently improved, and the dustproofing process can be efficiently performed in a large amount.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a first embodiment of the present invention.

FIG. 2 is a configuration diagram showing a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 5 Extrusion blade 8 Mixing blade 10 Lid 11 Spring

──────────────────────────────────────────────────続 き Continuing from the front page (56) References Latest Particle Processing Technology Gathering Editorial Board Edited Latest Particle Processing Technology Gathering Fundamental Technology May 1, 1971 Published by Industrial Technology Center, pp. 121-122 ( 58) Field surveyed (Int.Cl. ⁶ , DB name) B28C 5/14 B01F 3/18 B01F 7/04

Claims (1)

(57) [Scope of request for utility model registration] 1. A mixing device for stirring and mixing a powder and a heat-soluble synthetic resin in a predetermined high-temperature atmosphere, wherein the powder is injected into a closed cylindrical case having an inlet and an outlet.
A mixture of the powder and the heat-soluble synthetic resin is pressed into the inlet side.
Providing blades for extruding the mixture that is driven to rotate
At the same time, turn the mixture to the outlet side in the cylindrical case to stir and mix the mixture.
A stirring-mixing blade that is driven to rotate is provided, and is provided at an outlet of the cylindrical case to control the movement of the mixture.
A regulating member for controlling the mixture extruded by the mixture extrusion blade.
Of the speed in the flow direction and the rotation direction of the stirring and mixing blade
A mixing device , wherein a compression shear force is applied to the mixture by the displacement .