JPS5922637A - Mixing and discharging device - Google Patents

Abstract

PURPOSE:To suppress the crosslinking phenomenon of raw materials and to provide the stable effect of discharging by providing a rotary impeller in a vessel of a truncated circular cone shape in a mixing device for granular bodies. CONSTITUTION:An agitating member 5 which is turned and rotated along an inside wall surface 2 is supported at the upper part by a support arm 9 rotating around the central line P of a vessel 1 and is provided as a mixing means of the mixing vessel 3 in the vessel 1. A transmission shaft 10 is disposed in the arm 9 to transmit the revolutions from an electric motor to the member 5 via a speed changer 11, thereby rotating the member 5. The member 5 is mounted with many paddles 17 on its stem material 16 successively at every specified interval along the spiral curve. A screw conveyor 6 as a discharging machine is connected to the bottom of the vessel 1.

Description

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

Conventionally, a truncated cone-shaped container is used as a mixing tank or a pumper, and a rotating stirring blade is disposed inside the container, and the stirring blade is rotated and rotated along the wall surface of the container to mix powder and granular materials. Mixing equipment (hereinafter simply referred to as raw materials) or hoppers are used for mixing, supplying, and discharging a wide variety of raw materials, and are also equipped with heating jackets for drying, granulation, and kneading. ,
Furthermore, 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 the above-mentioned mixing, crosslinking phenomena due to adhesion or aggregation may easily occur depending on the raw materials when they are passed through the discharge machine from near the lower opening of the container. This had the problem of hindering the smooth discharge of raw materials. 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 material ends up in the narrow opening at the bottom, and its own weight exerts considerable pressure on the raw material itself. Things. Additionally, depending on the nature and type of the raw materials, it may be more effective to use stirring blades to move the particles in two directions, opposite to the downward discharge port, in order to strengthen the mixing effect within the container. For this reason, if you try to mix and discharge continuously, some highly adhesive materials may not flow smoothly from the mixing tank to the discharge machine, especially when flowing from the opening at the bottom of the mixing tank to the discharge machine. The adhesion and aggregation of the raw materials formed a strong and firm cross-linked state, which prevented the raw materials from the mixing tank from being sent to the discharge machine below, making it impossible to discharge them. 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, reference numeral 1 denotes a truncated cone-shaped container, and the inside of the container 1 is a mixing tank 3, and the inside of the container 1 has an inner wall surface 2.
A stirring member 5 which rotates along the axis is held at its upper part by a support arm 9 which rotates about the center line P'2 of the container 1 as an axis. The support arm 9 is connected to a transmission 11 and rotates inside the container 1. A transmission shaft 10 is disposed inside the support arm 9, and rotation from an electric motor 12 is transmitted through the transmission 11. The rotation is transmitted to the stirring member 5 and gives 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, the paddle 17 may be replaced by a spirally continuous screw blade, and it is also possible to change it depending on the properties and type of the raw material. In addition, the 17 groups of paddles in this example,
Alternatively, the arrangement of the screw blades, etc. can be 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 a raw material. Although the structure is configured to enhance the diffusion effect of particles to perform effective mixing and shorten the mixing time, the action of the stirring member 5 of the present invention is to stir and mix the raw materials in the mixing tank 3. Therefore, for example, in the case of slurry-like raw materials, the mixing effect is better when the direction of transport by the stirring member 5 is directed downward, and the direction of transport and its configuration are not necessarily limited depending on the raw material or its properties. . Note that the transmission 11 and the electric motor 12 are fixed to a support member 13 installed above the container 1, and a cover 15 equipped with a raw material input port 14 is provided inside the container 1. The cover 15 can be made robust to seal the inside of the mixing tank 3, but it may also be removed. Further, a screw conveyor 6 as a discharger is connected below the container 1, but the screw conveyor 6 has two screw blades having the same screw blade diameter and pinch length, and differing only in the screw direction of the blades. Screws 6a, 5
The axes of b are close to each other, and the blades are arranged parallel to each other so that they overlap, and are configured to rotate in opposite directions. It is also applicable to highly viscous materials. However, in the case of raw materials with relatively low adhesion, the screw conveyor 6 of this embodiment is not limited, and other types such as a single screw conveyor, a multi-shaft screw conveyor whose screw blades do not overlap each other, or a rotary valve are used. It is also possible to change the discharge machine to another one. Incidentally, a storage section 4 is formed between the lower opening 8 of the container 1 and the screw conveyor 6, and the stirring member 5 is provided in the storage section 4.
The lower end is extended, and a large number of paddles 18 are sequentially arranged at regular intervals so that the extension has a transport direction opposite to the transport direction of the stirring member 5 in this embodiment, that is, a downward transport direction. , and 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, similar 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 sub-stirring member 7 is provided as a vertical axis P within the container 1. These are determined also by the shape inside the container 1 and the outer diameter of the stirring member 5, for example, the shape of the container 1.
If the outer diameter of the stirring member 5 is relatively small compared to the inside of the container 1, or if the inclination angle θ of the inner wall surface 2 of the container 1 is larger than the valve, the former (A) is used, but conversely, the stirring member 5 The latter applies a larger stirring force to the lower opening 8 of the mixing tank 3 by using a thin film of the holder 19 to suppress the deformation of the stirring member 5 that tends to occur during stirring. 19 is available in a two-part configuration, 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 and sub-stirs them. The stirring member 7 is configured to move the raw material downward.

Note that a gate valve (not shown) is added to the opening 8 below the mixing tank 3 if necessary, so that it is possible to solve the problem of insufficient mixing of the initially charged amount of raw materials in the storage section 4. Alternatively, this may be accomplished by filling the reservoir 4 with separately mixed raw materials prior to charging the raw materials into the mixing tank 3.

Still another method is to provide a split-circle shaft through the stirring member 5, and attach the sub-stirring member 7 to the shaft so that the direction of rotation can be arbitrarily changed, such that it moves upward during mixing and downward during discharge. Mixing tank 3 can also be used during mixing by switching the transfer direction.
By causing circulation between the storage unit 4 and the storage unit 4, the storage unit 4
This also imparts a mixing effect to the raw materials inside. In addition,
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-described configuration, the raw material put into the container 1 is stirred while being pushed upwards by the rotation and revolution of the stirring member 5 rotated by the electric motor 12 via the transmission 11, and the raw material is stirred in the mixing tank 3. Uniform mixing progresses sequentially throughout the interior. Then, when the predetermined mixing is completed, the screw conveyor 6 is started and the raw materials in the storage section 4 are sequentially discharged. Similarly, both screws 5a of the two-shaft screw conveyor 6 stir the raw material in the storage section 4 through rotation and revolution.

It is made to actively bite between 6b and eject.

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, and it is possible to prevent the occurrence of crosslinking and rat holes due to adhesion and aggregation of raw materials, and the mixing tank The raw materials in 3 can be smoothly discharged. In particular, in the case of this embodiment, the screw conveyor 6 is constructed by arranging two screws 6a16b, which have the same diameter and pinch length and differ only in the twist direction of the blades, in parallel so as to overlap each other.
Therefore, it has an excellent evacuation effect even 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 stirring member 5 to the lower discharge mechanism 6. 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 adhere to the wall surface and coagulate with each other. This allows for stable and smooth continuous discharge. In addition, a mixing tank 3 with excellent mixing performance,
By effectively combining the discharge mechanism 6 with a stable discharge function, it can be used for mixing a wider range of raw materials, and can also be used as a simple storage tank and cut-out device, or as a supply and discharge device. The effects of the present invention are remarkable in view of the fact that it can be implemented with the configuration.

[Brief explanation of drawings]

FIGS. 1 and 2 are sectional views of main parts showing embodiments of the present invention,
FIG. 3 is a sectional view taken along the line A-A' in FIG. In the figure, 1... Container, 2... Inner wall surface, 3...
Mixing tank, 4... Storage part, 5... Stirring member, 6...
There is an ejection mechanism.

Claims (3)

[Claims] (1) A mixing tank having a truncated conical container 1 and a stirring member 5 that is supported at the upper part within the container 1 and rotates along the inner wall surface 2, and also rotates itself. A sub-stirring member 7 is connected to the discharge mechanism 6 through a storage section 4 provided below the storage section 3, and is provided within the storage section 4 by extending the stirring member 5 downward. A mixing and discharging device characterized by comprising: (2) The inner wall surface 2 is supported at the upper part in the truncated conical container 1.
The stirring member 5 rotates along the coaxial axis of the stirring member 5 with respect to the reservoir 4 of the discharge mechanism 6 connected to the lower side of the mixing tank 3 having the stirring member 5 configured to rotate along the same axis. The stirring member 5 is arranged in an extended manner and rotates symmetrically with the stirring member 5 using the intersection with the vertical axis P of the container 1 as a fulcrum, and
A mixing and discharging device characterized in that it includes a sub-stirring member 7 that is oriented in a direction of downward transfer with the lower opening 8 of the container 1 as a boundary. (3) The discharge mechanism 6 has two screws 5a and 5b that have the same screw blade diameter and pinch length, but differ only in the screw direction of the blades.The axes of the two screws 5a and 5b are brought close to each other so that the blades are parallel to each other so that they overlap. 3. The mixing and discharging device according to the above items 1 and 2, comprising a screw conveyor 6 disposed in a screw conveyor 6 and configured to rotate in opposite directions.