JP2009160544A - Agitation apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an agitation apparatus which has a structure capable of accurately and easily measuring the rotational speed of an agitation blade by a simple structure. <P>SOLUTION: The agitation apparatus has a rotation counter 9 which is connected to a rotary shaft 20 through a first spur gear 1, a second spur gear 2, a rotary shaft 3 and a flexible shaft 8. Therefore, rotation of the rotary shaft 20 can be accurately measured at any time whether large and small in agitation resistance based on a reaction, etc. of a material to be agitated in an agitation tank. As its result, agitation and mixing of the material to be agitated can be achieved under the optimum condition while suitably controlling a chemical reaction speed in the agitation tank. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a structure of a stirring device for mixing and reacting liquid substances, slurry substances, and the like by stirring.

  As a stirring apparatus, what is disclosed by the following patent document 1 is mentioned. This stirring apparatus is shown in FIG. The stirring device has a cylindrical stirring tank 10. Inside the stirring vessel 10, an arm 40 to which a plurality of small inclined stirring blades 60 are attached is disposed. The rotary shaft 20 is connected to the upper end portion of the arm 40 through a shaft coupling 30. A large vertical stirring blade 70 is attached to the lower end of the arm 40. A baffle plate 80 is attached to the inner wall surface of the agitation tank 10.

  In the stirring device having the above-described configuration, the rotating shaft 20 is rotated by using a drive device (not shown), whereby the stirring tank is obtained by the interaction of the inclined stirring blade 60, the vertical stirring blade 70, and the baffle plate 80. A swirl flow is generated in the stirring tank 10 and an upward flow and a downward flow are formed in the stirring tank 10, whereby the stirring mixture is stirred and mixed in the stirring tank 10.

  Here, since the rotational speeds of the inclined stirring blades 60 and the vertical stirring blades 70 have a great influence on the chemical reaction rate and the like, it is important to obtain the rotational speeds of the stirring blades accurately and quickly. In the following Patent Document 1, a method is disclosed in which a torque meter is installed in a driving device of a rotary blade, the torque during stirring and mixing of the stirring mixture is measured, and the rotational speed of the stirring blade is indirectly obtained. . As another method, a method of measuring the rotational speed of the rotary shaft 20 using a portable non-contact rotational speed meter can be mentioned.

However, in the method of indirectly determining the rotation speed of the stirring blade from the torque of the driving device, it is necessary to measure the correlation between the torque and the rotation speed of the stirring blade in advance, and the preparation work is complicated. The problem is concerned. In addition, when a portable non-contact tachometer is used, it is necessary to bring the non-contact tachometer closer to a rotating device such as the rotary shaft 20, so that the stirring must be constantly measured. Not suitable for work.
JP 06-198154 A

  The problem to be solved by the present invention is that the rotation speed of the stirring blade cannot be easily and simply obtained in the stirring device. Accordingly, an object of the present invention is to provide a stirring device having a structure capable of accurately and simply measuring the rotation speed of a stirring blade with a simple structure.

  The stirrer according to the present invention is a stirrer provided with a stirrer blade in a stirrer, wherein the stirrer blade is fixed, and the first rotating shaft for rotating the stirrer blade around an axis A first spur gear provided coaxially with the first rotation shaft, provided on an outer peripheral surface of the rotation shaft, a second spur gear meshing with the first spur gear, and provided coaxial with the second spur gear. And a tachometer connected to the second rotation shaft and for observing the number of rotations of the first rotation shaft transmitted by the first spur gear and the first second spur gear.

  According to the stirring device based on this invention, the tachometer for measuring the rotation of the rotating shaft is connected to the rotating shaft. This makes it possible to accurately measure the rotation of the rotating shaft at any time, regardless of the magnitude of the stirring resistance based on the reaction of the stirring material in the stirring tank. As a result, it is possible to achieve stirring and mixing of the stirring material under optimal conditions while appropriately managing the chemical reaction rate in the stirring tank.

  Hereinafter, a stirrer according to an embodiment of the present invention will be described with reference to FIG. The stirrer in the present embodiment is characterized by including a tachometer 9 for measuring the rotation of the rotary shaft 20 as the first rotary shaft provided with the stirring blades 60 and 70 in the stirring tank 10, The structure of the stirring device itself is the same as the structure shown in the background art. Therefore, the same or corresponding parts as those described in the background art are denoted by the same reference numerals, and repeated description will not be repeated, and only the configuration relating to the tachometer will be described in detail.

  The first spur gear 1 is attached to the outer peripheral surface of the rotating shaft 20 by using a fixing member such as a bolt. The rotating shaft 20 is a first rotating shaft. Further, a second spur gear 2 that meshes with the first spur gear 1 is arranged so that the rotation shaft thereof is parallel to the rotation shaft 20. The second spur gear 2 is provided with a rotating shaft 3 as a second rotating shaft provided coaxially with the second spur gear 2, and is rotatably supported by bearings 4, 4 accommodated in a bearing housing 5. Has been. The gear ratio (gear ratio) between the first spur gear 1 and the second spur gear 2 is determined by the specification of the tachometer 9 described later.

  An elbow joint 7 is coupled to the other end of the rotating shaft 3 via a connection fitting 6, and a flexible shaft (flexible shaft) 8 is coupled to the other end of the elbow joint 7. The flexible shaft 8 is inserted with a core rotating shaft 8b for transmitting rotation into the tube 8a. A tachometer 9 is connected to the other end of the flexible shaft 8. Here, as the tachometer 9, it is preferable to use a mechanical tachometer from the viewpoint of avoiding ignition of a chemical reaction in the stirring layer 10 (explosion-proof type). Further, by using the flexible shaft 8, the rotational speed of the rotating shaft 20 can be observed not only in the vicinity of the stirring layer 10 but also in a place away from the stirring layer 10.

  As described above, according to the stirring device in this embodiment, the tachometer 9 that measures the rotation of the rotary shaft 20 rotates via the first spur gear 1, the second spur gear 2, the rotary shaft 3, and the flexible shaft 8. It is connected to the shaft 20. Accordingly, it is possible to accurately measure the rotation of the rotating shaft 20 at any time, regardless of the magnitude of the stirring resistance based on the reaction of the stirrer in the stirring tank 10 or the like. As a result, it is possible to realize stirring and mixing of the stirring material under optimal conditions while appropriately managing the chemical reaction rate in the stirring tank 10.

  Although the embodiment based on the present invention has been described above, the embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a figure which shows the characteristic part of the stirring apparatus in embodiment based on this invention. It is a figure which shows the internal structure of the stirring apparatus in background art.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 1st spur gear, 2nd 2nd spur gear, 3 rotating shaft, 4 bearing, 5 bearing box, 6 connection metal fitting, 7 elbow joint, 8 flexible shaft (flexible shaft), 8a tube, 8b core rotating shaft, 9 Tachometer, 10 stirrer tank, 20 rotating shaft, 30 shaft joint, 40 arm, 60 inclined stirring blade, 70 vertical stirring blade, 80 baffle plate.

Claims (3)

A stirring device provided with a stirring blade in a stirring tank,
A first rotating shaft for fixing the stirring blade and rotating the stirring blade around an axis;
A first spur gear provided coaxially with the first rotary shaft and provided on an outer peripheral surface of the rotary shaft;
A second spur gear meshing with the first spur gear;
A second rotating shaft provided coaxially with the second spur gear;
A tachometer for observing the number of revolutions of the first rotation shaft connected to the second rotation shaft and transmitted by the first spur gear and the previous second spur gear;
A stirring device.   The stirring device according to claim 1, wherein the rotation of the second rotation shaft is transmitted to the tachometer by a deflection shaft between the second rotation shaft and the tachometer.   The stirring device according to claim 1 or 2, wherein the tachometer is a mechanical tachometer.

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