Stirring blade

The present invention relates to a stirring blade capable of efficiently mixing liquid-liquid or solid-liquid in the chemical industry, the pharmaceutical industry, the food industry, and the like.

There is known a stirring blade in which a plurality of plate-shaped blades formed in a substantially trapezoidal shape by the applicant are incorporated into a hub portion fitted to a rotation shaft (see Patent Document 1).<patcit num="1"><text>Design Registration No. 1191527</text></patcit>

<p> According to the stirring blade, a negative pressure is generated on the back surface on the receding side opposite to the rotation direction of each blade as the stirring blade rotates, and the flow taken in by the negative pressure is subsequently discharged by inertial force. There was a problem that the discharge efficiency was not high for the rotational power of the stirring blade.</p><p> An object of the present invention is to solve such a problem and to provide a low-cost stirring blade having low rotational power of the stirring blade and high discharge efficiency.</p>

<p> In order to achieve this object, in the present invention, a plurality of plate-shaped blades are arranged separately from the center of rotation to the forward side in the rotation direction at the root of the plate-shaped blades, and are connected and fixed to each other.</p>

<p> According to the present invention, since a plate-shaped blade having a simple structure can be used to obtain a stirring blade having high discharge efficiency, there is an effect that a stirring blade having high efficiency can be provided at low cost.</p>

Each embodiment of the best form of the stirring blade of the present invention is shown below.

FIG. 1 is a plan view of the stirring blade 1 of the first embodiment, and FIG. 2 is a perspective view of the stirring blade 1.

The stirring blade 1 is composed of a rotating disk-shaped body 2 at the center and four plate-shaped blades 3, and rotates in the direction of arrow A.

The plate-shaped blade 3 is formed in a flat plate shape and a vertically long rectangle, and the root portion of each plate-shaped blade 3 is separated from the center of rotation 2a toward the forward side in the rotation direction by an interval D, and the disk-shaped body 2 is offset. It is fixed to.

The interval D is a length corresponding to one tenth to one half of the diameter of the rotating disk-shaped body 2.

Further, the plate-shaped wing body 3 may have a ladder shape other than a rectangle, for example, a laterally convex ladder shape as shown in FIG. 3, or a triangular shape having vertices arranged at the top as shown in FIG. Further, as shown in FIG. 5, the shape may be an inverted triangle in which the vertices are arranged at the bottom.

In addition, in FIGS. 1 to 5, the rotating disk-shaped body 2 is fixed to the intermediate portion in the vertical direction of the plate-shaped blade body 3, but this is because the rotating disk-shaped body 2 is fixed to the lower end portion of the plate-shaped blade body 3. , Or may be fixed to other parts.

Next, the usage method of this embodiment and its effect will be described.

When the stirring blade 1 is vertically installed in the stirring tank and used, a rotating shaft (not shown) is inserted and fixed in the central portion 2a of the rotating disk-shaped body 2, and the rotating shaft is fixed by the arrow A in FIG. The liquid and the like in the stirring tank are agitated by rotationally driving in the direction of.

The flow of the stirring liquid in the vicinity of the tip of the plate-shaped blade 3 of the stirring blade 1 is different from that of the conventional stirring blade in which the plate-shaped blades are arranged radially with respect to the center of rotation. It collides with the front at an angle less than 90 degrees.

This has exactly the same effect as the rear curved blade, and since the rear curved blade is more efficient than the linear radiation blade, the stirring resistance of the main stirring blade 1 offset by the interval D is also reduced and the efficiency is high. Is obtained.

Furthermore, since the plate-shaped blade 3 of the main stirring blade 1 is arranged so that the plate-shaped blade 3 is offset from the center of rotation by an interval D, the back surface of the plate-shaped blade 3 is as shown in FIG. The negative pressure 3a generated in the above increases to generate a flow 3c guided from the positive pressure 3b side on the ventral side of the plate-shaped blade 3 to the negative pressure 3a side. By generating this flow 3c, the stirring blade 1 can realize high discharge efficiency, and further high efficiency can be obtained by the synergistic effect with the above-mentioned reduction in stirring.

In this embodiment, an example in which four plate-shaped blades 3 are attached to the stirring blade 1 is shown, but this may be a number other than four.

FIG. 7 is a plan view of the stirring blade 5 of the second embodiment.

The four plate-shaped blades 6 forming the stirring blade 5 are separated from the boss 8 via the connecting rod 7 at the root thereof by an interval D toward the forward side in the rotation direction (arrow A) of the boss 8. , It is connected and fixed in an offset shape.

The central portion of the boss 8 has a shaft hole 8a through which the rotating shaft is inserted.

Each plate-shaped blade 6 has the same shape as the plate-shaped blade 3 in the first embodiment, and the interval D is also formed to have substantially the same length as the interval D of the first embodiment. ing.

The method of using the stirring blade 5 and its effect are the same as those in the first embodiment.

In this embodiment, the stirring blade 5 has four plate-shaped blades 6, but the number may be other than four.

A plan view of the stirring blade 10 of Example 3 of the present invention is shown in FIG.

The stirring blade 10 has the same structure as that of the first embodiment except that the plate-shaped blade 11 is formed by bending the stirring blade 10 in three steps toward the receding side opposite to the rotation direction (arrow A) of the stirring blade 10. Is.

That is, the root portion of the plate-shaped blade 11 is offset from the rotation center 2a toward the forward side in the rotation direction by an interval D and fixed to the rotating disk-shaped body 2.

By forming the rear curved blade in this way, the stirring blade 10 can be made into a stirring blade with higher efficiency than the stirring blade 1 of the first embodiment.

The number of bends of the plate-shaped blade 11 may be a number other than three steps, or the plate-shaped blade 11 may be bent toward the receding side as in the plate-shaped blade 11 ́ shown in FIG.

Example 4 of the present invention will be described with reference to FIGS. 10 to 12.

FIG. 10 is a plan view of the stirring blade 13 of this embodiment, and FIG. 11 shows a side view (partially omitted) of the stirring blade 13.

The stirring blade 13 is composed of four plate-shaped blades 14 and a rotating disk-shaped body 15, and each plate-shaped blade 14 is bent in three steps toward the receding side opposite to the rotation direction (arrow A). It is the same as the stirring blade 10 (FIG. 8) of the third embodiment in that it is formed and arranged in an offset shape with respect to the center of rotation.

The plate-shaped wing body 14 of the fourth embodiment is formed in a triangular shape with the vertices arranged at the upper part, and is fixed on the rotating disk-shaped body 15.

The rotating disk-shaped body 15 has an upper portion formed in a conical shape and a lower surface protruding slightly below the plate-shaped wing body 14, and a permanent magnet magnet cup is formed on the bottom of the rotating disk-shaped body 15. I attached the ring.

As shown in FIG. 12, the stirring blade 13 is arranged at the bottom of the stirring tank 16, and the stirring blade 13 is rotationally driven by a rotating magnetic field generator (not shown) installed outside the stirring tank 16. Stir in the stirring tank 16. Since the stirring blade 13 of the present invention has good ejection efficiency, sufficient stirring can be performed even with a magnet coupling method having low transmission power.

Further, since the upper surface of the rotating disk-shaped body 14 has a tapered head cone shape, the flow surface of the stirring liquid and the cleaning property of the stirring blade are improved, and good results can be obtained.

In this embodiment, the number of the plate-shaped blades 15 of the stirring blade 13 is 4, but this may be a number other than 4.

The stirring blade of the present invention is promising as an inexpensive and efficient stirring blade in the field of liquid-liquid or solid-liquid mixing in the chemical industry, food industry, and the like.

<figref num="1">It is a top view of the stirring blade of Example 1 of this invention.</figref><figref num="2">It is a perspective view of the stirring blade of Example 1 of the same as above.</figref><figref num="3">It is a side view of another example of the stirring blade of Example 1 of the same as above.</figref><figref num="4">It is a side view of the stirring blade of Example 1 of the same as above, and another example.</figref><figref num="5">It is a side view of the stirring blade of Example 1 of the same as above, and still another example.</figref><figref num="6">It is explanatory drawing of the state around the blade of the stirring blade of Example 1 of the same as above.</figref><figref num="7">It is a top view of the stirring blade of Example 2 of this invention.</figref><figref num="8">It is a top view of the stirring blade of Example 3 of this invention.</figref><figref num="9">It is a top view of another example of the stirring blade of Example 3 of the same as above.</figref><figref num="10">It is a top view of the stirring blade of Example 4 of this invention.</figref><figref num="11">It is a side view of the stirring blade of Example 4 of the same as above.</figref><figref num="12">It is explanatory drawing which shows the use state of the stirring blade of Example 4 of the same above.</figref>

Code description

1, 5, 10, 13 Stirring blades 2, 15 Rotating discs 3, 6, 11, 11 ́, 14 Plate-shaped blades 7 Connecting rod D Interval (isolation to the forward side in the direction of rotation)