JPS6333898B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stirring device for powder and granular materials, and is widely used in, for example, mixing and drying processes.

Various stirring devices of this type have been proposed in the past, but it is often difficult to operate these devices in the case of powder or granular materials whose physical properties and shapes change significantly, or their wet materials. . For example, the material to be processed (hereinafter simply referred to as raw material) is stirred by a rotating stirring impeller into a cylindrical container whose axis is set horizontally, and is simultaneously transferred from the inlet to the outlet, and the appropriate amount is sequentially discharged from the outlet. The necessary amount of raw materials for the treatment is retained in the vessel and predetermined operations such as mixing and drying are performed, but it is impossible to achieve the desired purpose by appropriately combining the stirring action and the transport action. In practice, this is extremely difficult, and a sufficiently satisfactory stirring effect cannot be obtained with a single stirring mechanism alone. The present invention provides a stirring device for powder and granular material, which includes a rotary stirring impeller built into a cylindrical container whose axis is horizontally installed as described above.
The purpose is to solve the above-mentioned problems by effectively combining the main stirring action, the transfer action, and the sub-stirring action.

Next, the configuration of the present invention has an inlet at one end and an outlet at the other end of a container with a built-in rotating stirring impeller installed so that its axial direction is substantially horizontal, and the stirring element of the stirring impeller is connected to the container. a main stirring blade group having a stirring surface parallel to the axial direction of the stirring impeller on the outer side of the rotation along the inner peripheral wall; and a main stirring blade group located inside the main stirring blade group and inclined with respect to the axial direction of the container. a group of sub-agitating blades in the form of small pieces that can have a feeding surface such that the outlet is provided on the wall surface of the container at approximately the same height as the axis of the container; The horizontal height of the lower side of the opening cross section can be adjusted in the vertical direction.

Next, embodiments of this invention will be described. Bearings 9 are provided at both ends of the container 2 whose shaft center is horizontally arranged to rotatably support the shaft 10 of the stirring impeller 1, and a chain wheel 11 is fixed to one end of the shaft 10, not shown. It is rotated by a motor and a chain. A raw material inlet 3 is provided on one side of the container 2 and is connected to a raw material supply device (not shown) or an outlet of a previous process, and on the other side there is a raw material inlet 3 that is approximately the same as the one from the lower surface of the inner wall of the container 2 to the axis. An outlet 4 having an opening cross section a at the height is provided, said opening cross section a
The height h of the lower side b is adjustable in the vertical direction. That is, the screws 13 provided on the weir plate 12
This is done by rotating the handle 40 using the threaded rod 14 that restricts the axial movement of the outlet 4 and moving the weir plate 12 up and down. The stirring element 5 of the stirring impeller 1 includes a group of 7 main stirring blades having a stirring surface E parallel to the axial direction of the stirring impeller 1 on the outer side of rotation along the inner circumferential wall 6 of the container 2, and Feather 7
A small piece having, on the inside of the group, a feeding surface F inclined with respect to the axial direction of the container 2 so as to have a transfer action from the inlet 3 toward the outlet 4 by the rotation of the stirring impeller 1, for example. It is equipped with eight groups of sub-stirring blades shaped like the following. The 8 groups of auxiliary stirring blades may be fitted, for example, to a rod 14 that supports the 7 groups of main stirring blades from the shaft 10, or the degree of inclination of the feeding surface F may be freely changeable. In this embodiment, a holding plate 15 and a bolt 1 are used for the sub stirring blade 8 in FIG.
It is also possible to do this by holding the rod 14 with the rod 14.

Next, the effects of the above-mentioned embodiments will be described.
While the stirring impeller 1 is being rotated, raw materials are supplied from the inlet 3. As the material supplied into the container 2 is stirred, the retention amount thereof increases, and at the same time, the material is gradually discharged from the outlet 4. A certain equilibrium state is obtained depending on the supply and discharge conditions of the raw materials, and a predetermined retention amount of the raw materials can be obtained in the container 2, in other words, a predetermined stirring operation time can be given. The stirring surface E of the group of main stirring blades 7, which is provided parallel to the axial direction of the container 2, does not have the effect of transferring the raw material from the inlet 3 to the outlet 4, so it is effective in stirring the raw material. However, as mentioned above, since there is no axial transfer action, the total amount retained in the container 2 tends to be excessive, which is a disadvantage. However, when the retention amount is increased due to the inclined feeding surface F of the sub-agitation blade 8 as in the present invention, the transfer action works, so that an excessive retention amount is avoided.

In addition, as described above and as shown in the figure, the sub-agitation blade 8 is shaped like a small piece and does not have a continuous surface or a large surface, so it does not require a large driving force and does not require excessive transfer. Since it has no action, the internal volume of the container 2 can be effectively and fully utilized to impart a stirring action.

Although the above explanation has simply been about the mixing operation, if a drying operation is to be added along with the stirring, a heating jacket (not shown) should be attached to the outer periphery of the container 2, or a heating jacket from the inlet 3 and outlet 4 should be added. This can be carried out by introducing a hot air stream or by introducing a heat medium into the stirring impeller 1 from outside by using the shaft 10 as a hollow body.

Furthermore, the feeding direction of the feeding surface F of the sub-agitating blade 8 is as follows:
It is not always necessary to perform the transfer action only in the direction of the outlet 4, but depending on the stirring state of the raw material in the container 2, the rotation of the stirring element 5 may be performed in the opposite direction to the above-mentioned transfer action, or in a direction that does not provide the transfer action, such as the rotation of the stirring element 5. It may be partially set parallel to the rotation direction or in the same direction as a plane perpendicular to the same rotation direction.

In any case, the desired purpose can be achieved by adjusting the amount of raw material retained in the machine by adjusting the height of the weir plate 12 at the outlet 4 and adjusting the angle of the feeding surface F of the sub-agitating blade 8. Perform stirring operation. Reference numeral 17 denotes a second discharge port, which is used to discharge the raw material together with the aforementioned outlet 4 or to finally discharge the raw material completely, and the discharge valve and the like are not shown.

As described above, according to the present invention, it is possible to easily combine the stirring action and the transfer action in an appropriate manner, which makes it easier to adjust the amount of raw material retained in the container, that is, the stirring operation time, or to save on stirring power. In addition to being useful for optimization, it is also an effective preventive measure against excessive skewing of raw materials in containers and mechanical breakage accidents caused by these. In addition, the sub-stirring blades are in the form of small pieces and do not have a continuous transfer surface, so they can be
In addition, since multiple stirring actions and crushing actions are applied at the same time, it is combined with the stirring action of the main stirring blade group, and a highly efficient stirring action can be added.
This is extremely effective not only for the above-mentioned stirring action but also for drying operations.
It is industrially useful.

[Brief explanation of the drawing]

FIG. 1 is a main sectional view showing an embodiment of the present invention;
Fig. 2 is a cross-sectional view taken along line A-A' in Fig. 1, Fig. 3 is an enlarged view of cross-section C-C' in Fig. 1, and Fig. 4 is a cross-sectional view taken along line C-C' in Fig. 2.
It is an enlarged view of the B′ section. In the figure, 1... stirring impeller, 2... container,
3... Inlet, 4... Outlet, 5... Stirring element, 6...
...Inner peripheral wall of the container, 7...Main stirring blade, 8...Sub-stirring blade.

Claims (1)

[Claims] 1 A container 2 containing a rotating stirring impeller 1 and installed with its axis substantially horizontal has an inlet 3 at one end and an outlet 4 at the other end, and the stirring element 5 of the stirring impeller 1 is connected to the container 2. A group of 7 main stirring blades having a stirring surface E parallel to the axial direction of the stirring impeller 1 on the outer side of rotation along the inner circumferential wall 6 of the container 2; The outlet 4 is provided on the wall surface of the container 2 and is approximately parallel to the axial center of the container 2. The outlet 4 is provided near the same height H, and the outlet 4 is located at the lower side b of the opening cross section a.
A stirring device for powder and granular material, characterized in that the horizontal height h of the powder is adjustable in the vertical direction.