JPH0153091B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mixing and discharging device for powder and granular materials, which is equipped with a rotating stirring blade in a truncated conical container.

Conventionally, the inside of a truncated cone-shaped container is used as a mixing tank or a hopper, and a rotating stirring blade is disposed inside the container, and the stirring blade is rotated and rotated along the wall of the container. A mixing device or hopper for mixing body materials (hereinafter simply referred to as raw materials) is used for mixing, supplying, and discharging a wide variety of raw materials, and is also used for drying or granulation by attaching a heating jacket. or mixing,
It is also used for stirring liquids, reactions, etc. By the way, in this device, when the raw materials are discharged from the mixing tank after the prescribed processing such as mixing, depending on the raw materials, a crosslinking phenomenon due to adhesion or aggregation may occur from near the lower opening of the container to the discharge machine. This poses a problem in that smooth discharge of raw materials is obstructed. This is because the container has a shape that is wide at the top and narrow at the bottom, so when it is discharged, the raw materials will gather at the narrow opening at the bottom, and the weight of the raw materials will apply considerable pressing force to the raw materials themselves. Things. Additionally, depending on the nature and type of the raw materials, it may be more effective to use a stirring blade to move the particles upward, opposite to the downward discharge port, in order to strengthen the mixing action within the container. If you try to mix and discharge continuously, some highly adhesive raw materials may not flow smoothly from the mixing tank to the discharger.
In particular, from the opening at the bottom of the mixing tank to the discharge machine, the adhesion and aggregation of raw materials form a strong and firm cross-linked state, which prevents the raw materials from the mixing tank from being sent to the discharge machine below, making it impossible to discharge them. It was something I could do. The present invention suppresses the cross-linking phenomenon of raw materials that causes blockages during discharge, provides a continuous, smooth and stable discharge effect, and provides an excellent mixing and discharge device that is highly efficient. This will be explained using examples.

In FIGS. 1 to 3, 1 is a truncated cone-shaped container, and the inside of the container 1 serves as a mixing tank 3.
Inside, a stirring member 5 which rotates and rotates along the inner wall surface 2 is provided, the upper part of which is held by a support arm 9 which rotates about the centerline P of the container 1 as its axis. The support arm 9 is connected to a transmission 11 and rotates within the container 1, and a transmission shaft 10 is provided inside the support arm 9.
is provided, and transmits the rotation from the electric motor 12 to the stirring member 5 via the transmission 11, thereby imparting rotation to the stirring member 5. The stirring member 5 is constructed by attaching a large number of paddles 17 to a shaft member 16 at regular intervals and along a spiral curve, but in the case of the present invention, the paddles 17 are limited to the paddles 17. Instead of a screw blade, the paddle 17 may be replaced by a spirally continuous screw blade.
It is also possible to make changes depending on the properties and types of raw materials. Moreover, the paddle 17 in this embodiment
The arrangement of the group or screw blades, etc., is arranged in such a way that the raw material moves upward at least during rotation, in order to cope with powder and granular materials that are likely to cause crosslinking as raw materials. The stirring member 5 of the present invention is configured to enhance the diffusion effect of the raw material particles to perform mixing effectively and shorten the mixing time. However, the direction of transport and its configuration are not necessarily limited depending on the raw material or its properties, for example, for raw materials in the form of slurry, the direction of transport by the stirring member 5 is directed downwards for a better mixing effect. It's not something you can do. Note that the transmission 11 and the electric motor 12 are connected to a support member 1 installed on the top of the container 1.
A cover 15 equipped with a raw material inlet 14 is provided inside the container 1, but if necessary, the cover 15 may be made robust to seal the inside of the mixing tank 3. , but this can be removed. Further, a screw conveyor 6 as a discharger is connected below the container 1, but the screw conveyor 6 has the same screw blade diameter and pitch length, and only the screw direction of the blade is different. They are arranged close to the axes of the book screws 6a and 6b, arranged parallel to each other so that their blades overlap, and rotate in opposite directions. It can also be applied to viscous materials such as powder. However, in the case of raw materials with relatively low adhesion, the screw conveyor 6 of this embodiment is not limited, and a single shaft screw conveyor, a multi-shaft screw conveyor whose screw blades do not overlap each other, or a rotary valve It is also possible to change to a different type of ejector. By the way, a storage section 4 is formed between the lower opening 8 of the container 1 and the screw conveyor 6, and the lower end of the stirring member 5 is extended in the storage section 4, and the lower end of the stirring member 5 is extended to accommodate the extension. In this embodiment, a large number of paddles 18 are sequentially moved at regular intervals so as to have a transport direction opposite to that of the stirring member 5 in this embodiment, that is, a downward transport direction.
In addition, a sub-stirring member 7 is inserted along the spiral curve. As for the paddle 18 of the sub-stirring member 7, it is also possible to change it to a continuous screw blade, depending on the raw material, similarly to the stirring member 5 in the mixing tank 3. Regarding the insertion of the sub-stirring member 7 into the storage section 4, as shown in FIG. As shown in FIG. 2, there is one in which the stirring member 7 is provided along the center line P within the container 1. These are the shape inside the container 1 and the stirring member 5.
For example, if the outer diameter of the stirring member 5 is generally small relative to the inside of the container 1, or if the inclination angle θ of the inner wall surface 2 of the container 1 is small, the former is determined. On the other hand, when the outer diameter of the stirring member 5 is large relative to the inside of the container 1 and the inclination angle θ of the inner wall surface 2 of the container 1 is large, the latter (b) is applied. When a larger stirring force is applied to the raw materials, a holder 19 is attached to the lower opening 8 of the mixing tank 3 to suppress the deformation of the stirring member 5 that tends to occur during stirring. The holder 19 is attached in a two-part structure and can be easily removed if necessary. In this way, the stirring member 5 and the sub-stirring member 7 in the mixing tank 3 or the storage section 4 rotate together in the mixing tank 3 and the storage section 4, and the stirring member 5 stirs the raw materials.
The sub-stirring member 7 is configured to move the raw material downward.

Note that the storage section 4 below the mixing tank 3 is filled with separately mixed raw materials in advance before the raw materials are introduced into the mixing tank 3. Insufficient mixing can be resolved.

Still another method is to provide a separate shaft through the stirring member 5, attach the sub-stirring member 7 to the shaft, and change the direction of rotation arbitrarily, so that the direction of rotation is moved upward during mixing and downward during discharge. By switching the direction and allowing communication between the mixing tank 3 and the storage section 4 during mixing, the raw materials in the storage section 4 are also given a mixing effect. Regarding the method of supporting the shaft and switching the rotation direction,
Various configurations can be applied by adding design changes to conventionally known configurations.

With the above configuration, the raw materials put into the container 1 are stirred by the stirring member 5, which is rotated by the electric motor 12 via the transmission 11, while being pushed upward as it rotates and revolves, and is mixed. Uniform mixing progresses sequentially throughout the tank 3. and,
When the prescribed mixing is completed, the screw conveyor 6 is started and the raw materials in the storage section 4 are sequentially discharged. In the storage section 4, the sub-stirring member 7 connected to the stirring member 5 Similarly, both screws 6 of the two-shaft screw conveyor 6 are stirred while stirring the raw material in the storage section 4 through rotation and revolution.
It is made to actively bite between a and 6b and discharged. The amount discharged in this manner and reduced from within the storage section 4 flows down from the mixing tank 3 above and is replenished.
In this way, stirring and movement of the raw materials are constantly repeated in the mixing tank 3 and the storage section 4,
It is possible to prevent the occurrence of crosslinking and rat holes due to adhesion or aggregation of raw materials, and the raw materials in the mixing tank 3 can be smoothly discharged. In particular, in the case of this embodiment, the screw conveyor 6 is constructed by arranging two screws 6a and 6b, which have the same diameter and pitch length and differ only in the screw direction of the blades, in parallel so as to overlap each other. It has an excellent evacuation effect on materials that are considered to be extremely adhesive, such as viscous materials such as wet powder containing moisture. In this case, it goes without saying that the force applied to the stirring member 5 is supported by the attachment of the holder 19.

In this way, the present invention provides a storage section 4 between the mixing tank 3 and the discharge mechanism 6, and extends the stirring member 5 in the upper mixing tank 3 into the storage section 4 to feed the mixture to the discharge mechanism 6 below. A sub-stirring member 7 having a downward transfer direction is inserted, and constantly stirs the raw materials in the lower opening 8 of the mixing tank 3 and the storage section 4 to cause them to stick to the wall surface and coagulate with each other. This allows for stable and smooth continuous discharge. In addition, by effectively combining the mixing tank 3 with excellent mixing performance and the discharge mechanism 6 which also has a stable discharge mechanism, it can be applied to mixing a wider range of raw materials, and it can also be used as a simple storage tank and cut-out device. The effects of the present invention are remarkable, considering that it can be used as a supply/discharge device or as a supply/discharge device, and can be implemented with a simple configuration.

[Brief explanation of drawings]

1 and 2 are sectional views of essential parts showing an embodiment of the present invention, and FIG. 3 is a sectional view taken along line A-A' in FIG. In the figure, 1...container, 2...inner wall surface, 3...
...mixing tank, 4...storage section, 5...stirring member, 6...
...Discharge mechanism (screw conveyor), 6a, 6b
. . . screw, 7 . . . sub-stirring member, 8 . . . lower opening, P . . . center line.

Claims (1)

[Scope of Claims] 1. A stirring member 5 supported at the upper part of the truncated conical container 1, configured to rotate itself while rotating along the inner wall surface 2, and having an upward transfer direction.
A storage section 4 is provided below the mixing tank 3 and connected to a discharge mechanism 6, and the agitation member 5 is extended downward to the storage section 4, and a storage section 4 is provided below the mixing tank 3. A mixing and discharging device characterized by comprising a sub-stirring member 7 having a direction. 2. The discharge mechanism 6 has two screws 6a and 6b which have the same screw blade diameter and pitch length, and which differ only in the screw direction of the blades.The axes of the two screws 6a and 6b are brought close to each other and arranged in parallel so that the blades overlap each other. 2. The mixing and discharging device according to claim 1, comprising screw conveyors 6 configured to rotate in opposite directions. 3 A stirring member 5 supported at the upper part in the truncated conical container 1 and configured to rotate itself while rotating along the inner wall surface 2 and having an upward transfer direction.
A storage section 4 is provided below the mixing tank 3 and connected to a discharge mechanism 6, and the stirring member 5 is extended downward to the storage section 4. It is characterized by having an auxiliary stirring member 7 having a downward transfer direction that rotates symmetrically with the stirring member 5, with the intersection with the vertical center line P of the container 1 at the boundary with the storage section 4 as a fulcrum. Mixing and discharging device. 4 The discharge mechanism 6 has two screws 6a and 6b which have the same screw blade diameter and pitch length and differ only in the screw direction of the blades, and are arranged in parallel so that the axes of the screws 6a and 6b are close to each other and the blades overlap each other. 4. The mixing and discharging device according to claim 3, comprising screw conveyors 6 configured to rotate in opposite directions.