JPH0243478Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to the improvement of a stirring and mixing device for stirring and mixing substances in various states such as high viscosity fluids, slurry-like substances, and powders. It is an object of the present invention to provide a stirring and mixing device that has a rotating shaft and a rotating shaft insertion hole that allows the user to reliably and freely select the mounting position.

In general, equipment such as polymerization reactors that process various substances such as high viscosity fluids, slurry materials, and powders are required to have sufficient mixing action and a high heat transfer rate, and are also required to have a high heat transfer rate. It is desirable to have an anti-adhesion mechanism for processing. It is said that an effective and reliable way to meet these demands is to incorporate a self-cleaning mechanism with a good mixing effect into the device itself.

For this reason, a method using, for example, a screw-like agitating body has been conventionally known.

However, all conventional devices of this kind employ a special mechanism to provide self-cleaning effects, making them difficult to manufacture; capacity is too small.

○D If sufficient mixing action cannot be obtained, etc. There were flaws.

In order to eliminate such drawbacks, the applicant of the present invention previously proposed in Japanese Patent Application No. 47-59211 a stirring and mixing device consisting of a container, a rotating shaft, and a stirring body, and
A plurality of rotating shafts are connected to the drive unit in the container so as to rotate in parallel, in the same rotational direction, and at the same rotational angular velocity, and the stirring body is arranged to rotate coaxially with each of the rotating shafts, and In a cross section perpendicular to the axis, they are combined with a slight gap or in slight contact with each other, and the center of rotation of the stirring body and the axis of the rotation axis do not coincide in a cross section perpendicular to the rotation axis. , the center of rotation of the stirring body is configured to be in the same direction and the same distance from the axis of the rotating shaft, and the container is structured to have a cross-sectional portion that is equal to or slightly larger than the outermost trajectory of the stirring body. I suggested what should be done. For example, Figure 1a
- As shown in Fig. 1b, heat medium inlet/outlet 4,3
Two rotary shafts 7, 8 are connected to bearings 9, 10 and 11, respectively, at both ends of the cylindrical container 1, which has a jacket 2 having a
It is pivoted and stored at 12. Inside the empty container 1,
Stirring bodies 13 and 14 are connected and fixed to a plurality of disk-shaped stirring plates by rotating shafts 7 and 8, respectively, in a state in which the stirring bodies 13 and 14 penetrate in a skewer-like manner in the thickness direction of the plates. Also,
The rotating shafts 7 and 8 are connected to a drive unit (not shown) so as to rotate in the same direction and at the same rotational angular velocity.

The stirring bodies 13 and 14 are shown in FIG.
, - Figures 2a to 2b, which are cross-sectional views in the direction of arrows.
As shown in FIG. 1, a plurality of thick-walled disc-shaped stirring plates 13a, 13b, 13c, . . . :1
4a, 14b, 14c,... are arranged in series in the surface thickness direction with their eccentric positions shifted,
Each stirring plate 13a, 14a: 13b, 14b; 13
c, 14c: ..., etc. are provided so as to be in light contact with each other or with a slight gap between them, but normally each stirring plate has a diameter equal to the center distance O, P of the rotating shafts 7, 8. Each stirring plate 13 is a circular plate.
a, 14a: 13b, 14b: (Axis center O, P)
When rotating in the same direction and at the same rotational angular velocity around , the structure is such that they do not interfere with each other. Furthermore, the center A ₁ of the stirring bodies 13, 14,
B ₁ : A ₂ , B ₂ : ... do not coincide with the axes O and P of the rotating shafts 7 and 8, and A ₁ , B ₁ : A ₂ , B ₂ : ... are all in the same direction from O and P. , are arranged and connected so that they are eccentrically separated by the same distance. Therefore, the left and right stirring plates 13a, 14 that are close to each other
a: 13b, 14b: 13c, 14c: The gap between the peripheral edge of the rotating body and the container moves in the direction (rightward in FIG. 1). In this way, the stirring body itself forms an intermittent screw, and a strong processing material feeding action is generated. In addition, the inner wall of the container 1 has stirring bodies 13 and 14 as shown in FIGS. 2a and 2b.
The inner wall surface of the container is cleaned by the rotational movement of the stirring body.

However, the stirring plate used in the stirring/mixing device disclosed in Japanese Patent Application No. 47-59211 has a structure in which the thick stirring plate is simply inserted and fixed to a rotating shaft with a circular cross section, so it is difficult to handle high-viscosity liquids or solid particles. When stirring a slurry-like treatment material containing Conventionally, as a means to eliminate such drawbacks, a method has been used in which a keyway is formed in the rotating shaft for fixing the stirring plate.

However, when a keyway is formed on the rotating shaft, the rotating shaft tends to deform. Further, when a plurality of stirring plates are attached to a rotating shaft by sequentially displacing the fixed positions thereof to provide a function of feeding the substance to be treated, there is a drawback that the degree of displacement cannot be freely changed.

The present invention was made in order to eliminate the above-mentioned drawbacks of the rotating shaft of the stirring and mixing device and the attached thick stirring plate. Another object of the present invention is to provide a stirring and mixing device having a stirring plate having a rotating shaft and a mounting hole to which the fixing position of the stirring plate can be freely changed and the stirring plate can be attached.

The structure of the present invention to achieve the above object is composed of a plurality of rotating shafts arranged parallel to each other, and a plurality of connected stirring plates each having a skewer penetrating the plate surface perpendicularly to each rotating shaft. In a stirring/mixing device, the rotating shaft is configured to have a polygonal cross-section. The agitating body is made of a polygon having a number of sides larger than the number of sides of the cross-sectional shape of the rotating shaft, or a plurality of openings having the same cross-sectional shape as the cross-sectional shape of the rotating shaft, arranged on the same axis as each other. It is characterized by being composed of a plurality of stirring plates each having a through hole in a shape obtained by angular rotation.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 3 is a partially sectional front view of the stirring and mixing device of the embodiment, in which 1 is a cylindrical container; 15 and 16 are rotating shafts inserted parallel to each other into the container 1; 17 and 18
are stirring bodies; 17a, 17b, 17c, ... and 1
8a, 18b, 18c, . . . are disk-shaped stirring plates constituting the stirring bodies 17, 18.

The rotating shafts 15, 16 have a square cross section as shown in FIG. 4, and have disc-shaped stirring plates 17a, 1.
7b,..., 18a, 18b,... have octagonal through holes 1 through which the rotating shafts 15, 16 pass, respectively.
5' and 16' are provided.

Sleeves 19, 2 are inserted through the rotating shafts 15 and 16 at the ends of the disc-shaped stirring plate groups 17a, 17b, 17c, . . . and 18a, 18b, 18c, .
0 is provided to prevent the stirring plate from moving in the longitudinal direction of the shaft. The ends of the sleeves 19, 20 are fixed to the rotating shafts 15, 16 with screws 21, 2.
2 is fixed with presser nuts 23 and 24 so as to mesh with each other. The disc-shaped stirring plates 17a, 17b,
...; 18a, 18b, ... are inserted by changing the direction of the octagonal holes 15', 16' by 60 degrees, through which the rotating shafts 15, 16 are inserted.
Stirring plates can be attached at 360°/8=45° increments, and the operation conditions of the stirring and mixing device can be appropriately selected to adjust the function of feeding the material to be treated in the direction of the rotation axis.

That is, by making the aperture of the stirring plate m, an integral multiple of the number of sides n of the rotating shaft, the stirring plate can be displaced in angular increments obtained by 360°/(m, n).

Further, as shown in FIG. 5, stirring plates 17a,
The rotating shaft insertion holes 27 of 17b,..., 18a, 18b,... have a star shape in which the square cross sections of the rotating shafts 25, 26 and the cross section obtained by rotating the rotating shafts 25, 26 concentrically by 45 degrees with the axis O are superimposed. Even if the stirring plate is formed in a through hole, each stirring plate can be mounted by displacing each stirring plate by 45 degrees with respect to the rotating shaft.

As is clear from the above description, the stirring and mixing device according to the present invention has the rotating shaft and stirring body configured as described above, so that a plurality of stirring plates can be displaced on the rotating shaft and any Can be installed at intervals. Furthermore, since no stirring plate mounting groove is provided on the rotating shaft, no deformation occurs.

[Brief explanation of the drawing]

Fig. 1a is a partially sectional front view of a conventional stirring/mixing device, Fig. 1b is a sectional view taken in the - arrow direction of Fig. Figure b is a cross-sectional view taken along the - arrow in Figure 1 a, Figure 3 is a sectional front view of the essential parts of the stirring and mixing device of the embodiment of the present invention, Figure 4 is a cross-sectional view taken in the - arrow direction of Figure 3, and Figure 5. FIG. 2 is a sectional view showing the structure of another embodiment of the stirring plate and rotating shaft used in the stirring and mixing device of the present invention. In the drawings, 1... Container, 7, 8... Rotating shaft of conventional device, {13a, 13b, 13c, 14a, 14
b, 14c}... Stirring plate of conventional device, {15, 1
6, 25, 26}...Rotating shaft of the embodiment device, {1
7a, 17b, 17c, 18a, 18b, 18
c}... Stirring plate of the example device, {15', 16',
27}...Example device stirring plate through hole.

Claims (1)

[Scope of utility model registration request] A stirring body composed of a plurality of rotating shafts arranged parallel to each other, a plurality of stirring plates each having a plate surface perpendicularly connected to each rotating shaft in a skewer shape, and housing the rotating shafts and the stirring body. In a stirring/mixing device comprising a container having a lumen that is equal to or slightly larger than the outermost locus of the stirring body, the rotating shaft is configured with a polygonal cross-section, and the stirring body is configured to have a cross-sectional shape of the rotating shaft. A plurality of stirring holes having a shape obtained by rotating a plurality of polygonal openings having a larger number of sides than the number of sides, or openings having the same cross-sectional shape as the rotating shaft through arbitrary angles around the same axis. A stirring/mixing device characterized by being composed of a plate.