JP2007330847A - Stirring apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stirring apparatus capable of satisfactorily stirring highly viscous fluid using stirring blades of simple structure. <P>SOLUTION: This stirring apparatus is composed of a servomotor 4 rotating a stirring shaft 2 having the stirring blades 3; a support body 5 supporting the servomotor 4; a servomotor 31 for vertical movement vertically moving the support body 5; and a control means 35 controlling operations of a guide mechanism (a vertical guide member 22 and a linear sleeve 15) vertically guiding the support body 5, the servomotor 4 and the servomotor 31 for vertical movement. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a stirring device that efficiently stirs a liquid by rotating a stirring shaft, to which a stirring blade is attached, using a servo motor, forward and reverse, and up and down.

  Conventionally, a stirrer is used in various industrial fields for various purposes such as mixing, dispersion, dissolution, and reaction. In general, it is well known that when agitating blades are stirred using a turbine blade in a low lay nozzle range, doughnut-shaped unmixed regions are generated above and below the stirring blade. In order to eliminate this doughnut-shaped unmixed region, in many cases, a means using a high-viscosity stirring blade such as a helical ribbon blade is taken. On the other hand, another means is based on unsteady stirring.

  Unsteady agitation is a different agitation method from agitation where the agitating blades are rotated in a certain direction at a constant speed and the agitation shaft is moved up and down. There are methods to make For example, Patent Document 1 discloses a device that stirs a liquid by moving it vertically while rotating the stirring shaft. Further, Non-Patent Document 1 discloses a technique that can easily eliminate the doughnut-shaped unmixed region by rotating the stirring blade forward and backward and moving up and down.

JP-A-8-108057 Masako Ban, 4 others, “Evaluation of mixing performance of invariant stirring using asymmetric blades”, [online], 2005.9.28, Faculty of Engineering, Nagoya Institute of Technology Search on May 30, 2006] Internet <URL: http://www.ach.nitech.ac.jp/chemeng/kakoken1.html>

  In order to stir the fluid in the low lay nozzle range, it is necessary to use a stirring blade having a complicated shape such as a general-purpose helical ribbon blade or a recently developed large blade. However, this type of agitating blade has a problem in that it is expensive because it is structurally complicated. In addition, according to the conventional unsteady stirring method, it is effective to improve the stirring performance. However, in the changing operation of the rotating direction of the stirring blade, the changing operation by a reciprocating method or a preset time interval is used. Therefore, it is difficult to automatically operate by any means.

  In the stirring technique known from Patent Document 1, the stirring blade can be moved up and down and rotated at the same time. The vertical movement of the stirring blade is performed at the same time as the rotation by the groove cam at the operation unit connected to the stirring shaft. It is supposed to be done. Therefore, the rotation and the vertical movement are operated under certain conditions, and at the same time, the stirring blades always move up and down during the rotation operation. Therefore, the rotation and the vertical movement cannot be individually operated according to the properties of the fluid to be stirred. is there. Moreover, since a groove cam is used in terms of structure, an increase in cost is inevitable for use in an apparatus that requires a large stirring force. Furthermore, when the agitating blades are rotated forward and backward, there is a problem that it is difficult to ensure a smooth motion due to a large torque acting on the cam mechanism.

  The present invention has been made to solve such problems, and provides a stirrer capable of performing good stirring, that is, stirring processing in a short time using a stirring blade having a simple structure for a high-viscosity fluid. It is for the purpose.

In order to achieve the above object, the stirring device according to the present invention comprises:
Servo motor that rotationally drives a shaft including a stirring blade, a support that supports the servo motor, a vertically moving actuator that moves the shaft including the stirring blade in a vertical direction, and operations of the servo motor and the vertical motion actuator And a control means for controlling.

  In the invention, the shaft provided with the stirring blade may be configured to be moved up and down by the actuator for vertical movement through a support body together with the servo motor (second invention).

  In the first invention or the second invention, the support is slidably supported by the vertical guide member on both sides of the support and is operated by the vertical movement actuator at a position away from the stirring tank. It is good that it is the structure connected and supported by the member (3rd invention). Further, the vertical movement actuator may be a servo motor, and the servo motor may drive the screw shaft to move the stirring shaft up and down a required distance via the support (fourth invention).

Next, the stirring device according to the fifth invention is:
A servo motor that rotationally drives a shaft provided with a stirring blade, a shaft provided with the stirring blade and a horizontal joint-type support arm that supports the servo motor, a drive unit that rotates the support arm, and a support body thereof; A vertical drive mechanism and a vertical movement actuator for moving the shaft including the stirring blade in the vertical direction via a support arm; and a control means for controlling operations of the servo motor, a turning drive portion of the support arm and the vertical movement actuator; It is characterized by providing.

Furthermore, the stirring device according to the sixth invention provides:
A shaft provided with a stirring blade is a double shaft, a vertical paddle type stirring blade is formed on the hollow shaft on the outer side thereof, and a stirring blade rotating on the inner side of the rotation trajectory of the vertical paddle type stirring blade is formed on the central shaft, respectively. These shafts are each driven by a servo motor independently, and the central shaft is moved up and down by a vertical movement actuator to operate each servo motor and vertical movement actuator. Control means for controlling is provided.

  In the sixth aspect of the invention, the paddle type stirring blade is configured to rotate at a position close to the inner surface of the stirring tank, and has a structure in which the central axis is slidable up and down and supported in the support shaft. (7th invention).

  According to the first invention, the stirring shaft provided with the stirring blade is driven by the servo motor, and the stirring blade can be moved up and down within a required range together with the servo motor, and the servo motor and the vertical movement actuator are controlled by the control means. By configuring the agitation conditions according to the physical properties of the fluid to be agitated in advance by the control means, it is possible to arbitrarily set the rotation and up / down operation utilizing the characteristics of the servo motor, and effectively Can be stirred. Therefore, the effect of stirring the fluid can be effectively enhanced without using a stirring blade having a complicated structure, and the working efficiency can be improved by reducing the stirring time.

  According to the fifth aspect of the present invention, the shaft (stirring shaft) provided with the stirring blade is supported by the horizontal joint type support arm, the stirring shaft is driven by the servo motor, and the support arm is separately powered from the drive unit. If the swivel operation is performed according to a preset program, the stirring blade can be moved in the stirring tank without being held at a specific position, and the stirring operation can be performed by moving the stirring shaft up and down by the vertical drive mechanism and the vertical movement actuator. A three-dimensional operation can be performed, and an effect that a stirring operation can be performed more effectively even with stirring of a highly viscous fluid is achieved.

  According to the sixth aspect of the invention, it is possible to perform a fluid stirring operation by combining two types of stirring blades, and in addition, the operation of each stirring blade can be arbitrarily set by driving with a servo motor. A simple but unconventional mixing of fluids can be performed three-dimensionally. Therefore, even a highly viscous fluid can be more effectively stirred.

  Next, specific embodiments of the stirring device according to the first invention will be described with reference to the drawings.

  FIG. 1 is an overall schematic diagram showing an embodiment of a stirring device according to the first invention. FIG. 2 is a view taken along the line AA of FIG.

  The stirring device 1 of the present embodiment mainly handles a highly viscous fluid. The stirring device 1 includes a stirring shaft 2 having a stirring blade 3, a servo motor 4 that is an actuator that rotationally drives the stirring shaft 2, a support 5 that supports the servo motor 4 and can be moved up and down, The servo motor 31 is an actuator for moving the support 5 up and down, the support mechanism 10 that supports these devices, and the control means 35 that controls the drive of the servo motors 4 and 31.

  A stirring blade 3 of a required type is attached to the tip of the stirring shaft 2 so as to be inserted at a required depth position in the middle of the stirring tank 6 in a normal state during operation. The rear end of the stirring shaft 2 is connected to the output shaft 4a of the servomotor 4 so as to be detachable by a joint 7 above the stirring tank 6.

  The servo motor 4 is mounted on the support 5 with its axis perpendicular, and can move up and down with the support 5 along the vertical guide members 11 and 11 of the support mechanism 10 disposed on both sides. Has been.

  The support mechanism 10 has a space that can receive the stirring tank 6 into which the stirring shaft 2 driven by the servo motor 4 is inserted from the front position, and is disposed at an outer position of the stirring tank 6. A pair of the upper and lower guide members 11, 11 and an actuator support structure portion 13 for moving up and down a support body, which will be described later at the rear position of the stirring vessel 6, are supported on the base member 12 by supporting the lower ends of the members. Are integrally attached by the top member 14. The support mechanism 10 is assembled and configured so that each member has at least the height required to pull the stirring shaft 2 out of the stirring tank 6.

  The support body 5 supports the servo motor 4 on the center upper surface of the front part, and engages with the vertical guide members 11 and 11 (shaft body in this specific example) standing upright on both sides of the support part of the servo motor 4. Each guide body (linear bush 15) is provided, and a female thread piece 16 that is screwed to the screw shaft 26 at a rear intermediate position is attached to form a triangular shape in plan view. The support 5 has a flat plate shape that is reinforced either up or down as necessary, and the female screw piece 16 is moved up and down by the rotation of the screw shaft 26 driven by the vertical movement actuator. . Further, a tail of a counterbalance wire rope 19 is fixed to the support 5 in the vicinity of the arrangement of the linear bushes 15 and 15 and attached to the top member 14 of the support mechanism 10 via a bracket 17. A counterweight 20 is suspended around the end of the wire rope 19 around the sheave 18 so that the vertical movement of the support 5 is balanced to achieve smooth operation.

  A servo motor 31 is used as the vertical movement actuator, and the servo motor 31 is supported horizontally at two ends of two vertical members 22, 22 arranged on both sides at the rear of the support mechanism 10 and fixed horizontally. The actuator support structure member 23 is disposed so that the axis is vertical. The output shaft 31 a of the servo motor 31 is connected to one end of the screw shaft 26 with the axis aligned by a coupling 32. The other end of the screw shaft 26 is rotatably supported by a bearing 27 attached to the top member 14. In the figure, reference numeral 28 denotes a bearing unit that supports the connecting portion side neck of the screw shaft 26. It is preferable that a ball screw is used for the screw shaft 26 so as to operate smoothly.

  The control means 35 for controlling the agitation shaft driving servomotor 4 and the vertical movement servomotor 31 has a control panel in which a control operation unit (not shown) for agitation is installed separately. . The control means 35 sets the forward / reverse rotation speed and switching time of the servo motor 4 for driving the stirring shaft, and the vertical movement of the stirring blade 3 by setting the forward / reverse rotation and switching time of the servo motor 31 for vertical movement. It can be performed. And the program which preset those combinations is memorize | stored in a calculating part, and it enables it to operate automatically.

  The stirrer 1 of the present embodiment configured as described above has a stirring shaft 2 inserted into a stirring tank 6 into which a required fluid is injected so that the stirring blade 3 is in a predetermined position, and the stirring condition of the fluid to be handled is set. When the operation is started based on the corresponding control program, the stirring shaft 2 is rotated by the drive of the servo motor 4, and the fluid in the stirring tank 6 is stirred by the stirring blade 3. Here, the agitating blade 3 is rotated in the forward and reverse directions as the time elapses by operating the agitation shaft-driven servomotor 4 according to a control program preset by the control means 35. The servo motor 31 is operated to reciprocate up and down within a required range while rotating the stirring blade 3. In order to move the stirring blade 3 up and down, the support 5 is moved in the vertical direction by driving the servo motor 31 for vertical movement via the screw shaft 26 connected to the output shaft and the threaded female thread piece 16. Sent to. The support 5 is on both sides of the position where the servo motor 4 is attached, and the linear sleeves 15 and 15 are slid on the upper and lower guide members 11 and 11 and are connected to the counterweight 20 in the vicinity thereof. Since they are connected, they move up and down following smoothly. Therefore, both the stirring shaft 2 driven by the servo motor 4 on the support 5 can also move up and down to move the stirring blade 3 in the axial direction.

  The stirrer 1 of this embodiment employs a servo motor 4 (31) as a driving device for the fluid agitation operation by the agitating blade 3, thereby providing high output, good control responsiveness, and the ability to perform desired control. It can be used effectively. In addition, since the drive source is configured separately so that the rotational drive and the vertical movement operation of the stirring blade 3 can be individually controlled, it is possible to arbitrarily set the stirring conditions according to the properties of the fluid to be handled. It was. Accordingly, the rotation of the stirring blade 3 is set by a program, for example, the rotation direction of the stirring blade 3 is made constant and the operation of periodically stopping is performed, or the rotation of the stirring blade 3 is periodically rotated in a constant direction. The operation of stopping and then rotating in the opposite direction is repeated, and the unsteady operation such as the operation of periodically moving the required distance in the vertical direction in addition to the rotation operation of the stirring blade 3 is optional. Can be set to By doing so, the fluid can be agitated irregularly, and the stirring effect of the fluid with high viscosity can be enhanced. In other words, the time for the stirring operation can be shortened.

  Next, in order to verify the effect of the stirring apparatus according to the present invention, an experiment was performed, and performance evaluation was performed by measuring a mixing time. The results are described below.

(Example)
FIG. 3 shows a schematic diagram of a stirring tank used in the experiment. A glass transparent cylindrical tank (diameter D = 124 mm, height H = 83 mm) without a baffle plate was used as the stirring tank 6. As the stirring liquid, an aqueous candy solution was used. As the stirring blade 3, a six-blade disk turbine blade (diameter d = 70 mm, height b = 14 mm) was used, and the stirring blade 3 was arranged so as to be positioned at the middle of the liquid height. The rotation speed of the stirring blade 3 is 60 to 300 r. p. m was driven by a servo motor. Measurement of the mixing time and observation of the mixing process were performed by a decolorization method using a reaction between iodine and sodium thiosulfate.
Furthermore, as the setting conditions, fluctuations in the rotational direction are set as shown in Table 1, vertical movements are shown in Table 2, and combinations of rotation direction switching times and vertical movements are set as shown in Table 3.

  In order to compare the mixing performance with stirring under the above-mentioned setting conditions, the mixing time tm was measured while changing the Reynolds number Re. Under each condition, the agitation characteristic curve in which Re and N · tm are plotted in logarithm form is shown. FIG. 4 shows the case where the stirring blade is rotating forward, FIG. 5 shows the case where the stirring blade is rotating forward and reverse, and FIG. FIG. 7 shows the case where the blade is moved up and down, and FIG. 7 shows the case where the stirring blade is combined with forward / reverse rotation and vertical movement.

  First, regarding the change in the rotation direction of the stirring blade 3, from FIG. 4 and FIG. 5, in the switching time 2s, the switching frequency increases as the operation time becomes shorter, so the mixing time becomes shorter. However, N · tm is longer in the operation time 1 s than in the operation time 2 s. This is probably because the switching time was longer than the operation time. Regarding the switching time 0 s, the operation time 1 s was the shortest in N · tm. However, in the case of one rotation, N · tm is longer than the operation time 1 s. This is presumably because sufficient agitation was not possible because the discharge flow rate from the agitating blade 3 was small. In addition, at low Re, the mixing performance was better than that of non-uniform stirring. Moreover, when the stirring blade 3 compares only forward rotation and forward / reverse rotation, it can be seen that the mixing performance is improved by changing the rotation direction.

  Next, in the case of moving up and down while rotating the stirring blade 3, from FIG. 6, the mixing performance improved as the up and down moving speed was increased at the up and down moving distance of 3.0 cm. Contrary to the expectation that would be easily destroyed, the doughnut-shaped unmixed region moved up and down as the stirring blade 3 moved up and down. Here, when compared with the best result of the vertical movement distance of 3.0 cm, both were substantially the same. Further, when the vertical movement distance is increased to 4.0 cm and 5.0 cm, the stirring blade 3 moves to the liquid surface and the vicinity of the tank bottom, so that a doughnut-shaped unmixed region is not formed and the mixing performance is further improved. It was.

  In the case of the combination of the switching time of the rotating direction of the stirring blade 3 and the vertical movement, from FIG. 7, the mixing time was shortened due to the synergistic effect of the switching frequency and the vertical movement of the stirring blade. Here, when compared with the results of fluctuations in the rotation direction and vertical movement, for example, the mixing performance was better at the operation time of 2 s and the vertical movement distance of 3.0 cm than at the switching time and the vertical movement result of the same movement distance. In addition, when the vertical movement distance is lengthened, the mixing performance is the non-uniform stirring with the best mixing performance (the maximum rotation speed is twice the average rotation speed and 0.5 times the minimum rotation speed while the stirring blade rotates once). Take the value of).

  From the above, at low Reynolds number Re, the mixing performance is improved as compared with non-uniform stirring. In order to improve the mixing performance with fluctuations in the rotation direction, the frequency of the switching time and the fluctuation in the rotation direction are important for improving the mixing performance. Further, in the vertical movement, increasing the vertical movement speed and the vertical movement distance is important for improving the mixing performance. From this, it was confirmed that the mixing performance was better than other mixing conditions due to the synergistic effect of the switching frequency and the vertical movement of the stirring blade.

  In the above description, in the stirring device of the present embodiment, the actuator for moving the stirring blade up and down has been described using a servo motor, but the present invention is not limited to this, and as necessary. If a servo control mechanism is used, a hydraulic cylinder can be used, or a combination of a servo motor and a link mechanism can be used. In addition, the shape of the stirring blade is not limited to that according to the above-described embodiment, and an optimum type can be selected and used according to the properties of the fluid to be handled.

  Next, FIG. 8 shows a schematic view (a) and a plan view (b) showing an embodiment of the stirring device according to the fifth invention.

  In the stirring device 1A of this embodiment, a stirring shaft 2A having a stirring blade 3A at the tip is supported by the tip of a horizontal articulated support arm, and the stirring shaft 2A rotates in the stirring tank 6A. It is a device of a type configured to be movable.

  The support arm 40 is formed by connecting a first support arm 41 and a second support arm 42 in a joint shape that can be horizontally rotated, and a base end portion 41a of the first support arm 41 is appropriately connected to the stirring tank 6A. It is attached to a side surface portion of a support base 43 erected at a position that is laterally separated by a distance, and is supported by a support frame 44 that is movable up and down. The support arm 40 is supported by the support frame 44 so as to be able to turn horizontally in a range of a required rotation angle by driving a motor 45 (not limited to using a servo motor). In addition, at the joint portion between the first support arm 41 and the second support arm 42, the second support arm 42 is configured to rotate horizontally with respect to the first support arm 41 when driven by the servomotor 46. .

  The support frame 44 is attached so as to slide in the vertical direction on the side surface portion 43a of the support base 43 formed with a height dimension higher than at least the upper edge of the stirring tank 6A. 43 is configured to move up and down through a female screw piece 44b attached to a bracket 44a provided at the base end portion of the support frame 44, for example, by a vertical screw shaft 44d. A vertical drive device 47 to which a counterbalance mechanism (not shown) is attached is provided.

  The stirring shaft 2A is rotatably and vertically supported by a bearing mechanism (not shown) at the tip end of the support arm 40 thus configured (tip end of the second support arm 42). Is driven via a power transmission mechanism (not shown). The servo motor 48 is arranged at the joint portion of the support arm 40, and rotates the agitation shaft 2A by winding conduction with a conduction wheel attached to the upper part of the agitation shaft 2A. . Alternatively, the stirring shaft 2A may be directly connected to a servo motor and driven to rotate.

  In the stirrer 1A configured as described above, each servo motor 45, 46, 48 and the like according to a control program prepared in advance by a separately installed control device (not shown) as in the above-described embodiment. By controlling the operation of the other driving machine, the rotation speed of the stirring blade 3A and the stirring shaft 2A are displaced in the stirring tank 6A according to the physical properties of the solution to be stirred, and the support arm 40 is displaced in the stirring tank 3A. The agitating ability can be increased by making the planetary motion of the. For such a driving operation, by making full use of the characteristics of the servo motor, it is possible to improve the stirring performance that could not be predicted in the past. Therefore, even when stirring a highly viscous liquid, the stirring and mixing operation can be performed by changing the stirring position regardless of the rotation of the stirring blade 3A at a fixed position according to the viscosity and the like, and the stirring shaft can be moved up and down at the same time. Therefore, stirring can be performed efficiently by adding a three-dimensional stirring action.

  In the above-described embodiment, in order to move the stirring blade 3A up and down, the support frame 44 attached to the support base 43 is moved up and down, and the support arm 40 having the base end attached to the support frame 44 is moved up and down. The configuration in which the agitating blade 3A is moved up and down through the agitation shaft 2A is described. However, the present invention is not limited to this, and although not illustrated, a mechanism that moves up and down on the support arm 40 is provided. Other methods such as moving up and down at the portion where 2A is supported can also be adopted.

  FIG. 9 is a longitudinal sectional view showing the outline of one embodiment of the stirring device according to the sixth invention. The stirrer 1B of this embodiment is a composite type configured such that a vertical paddle type stirring blade 51 and a horizontal stirring blade 52 are rotationally driven independently of each other.

  In this stirring device 1B, a pedestal 55 is disposed at the center of the lid that covers the top of the stirring tank 6B, and the bearing portion 54 of the stirrer 50 is installed on the top of the pedestal 55, and is supported by the bearing portion 54. Thus, a composite stirrer 50 is rotatably suspended in the stirring tank 6B.

  The stirrer 50 includes two vertical paddle-type stirring blades 51 (hereinafter simply referred to as “outer paddle 51”) that are rotatably provided at an appropriate interval from the inner peripheral wall surface 6b of the stirring tank 6B, and the outer paddle. A horizontal agitating blade 52 that is rotatably provided inside the rotation locus 51 is formed in a composite manner. As the horizontal stirring blade 52, any one of a paddle, a propeller blade, a turbine blade, and the like that are horizontal and have an inclination angle can be selected. And the horizontal stirring blade 52 can be made into the structure arrange | positioned at 2 steps | paragraphs, for example. In this embodiment, a configuration in which horizontal paddles are arranged in two upper and lower stages is used (hereinafter referred to as “inner paddle 52”).

  The outer paddle 51 and the inner paddle 52 of such a stirrer 50 are a tubular shaft 53b in which the inner paddle 52 is attached to the center shaft 53a of the double shaft type stirring shaft 53 supported by the bearing portion and is fitted externally. A base portion of the outer paddle 51 is attached to the lower end of the base plate. The outer paddle 51 has an arm portion 51a projecting from the base to the left and right sides, and a paddle portion 51b having a width set downward from the distal end of each arm portion 51a to the inner wall surface 6b of the stirring tank 6B. It is arranged symmetrically so as to hang down with an interval of. With respect to the outer paddle 51, the inner paddle 52 is disposed at a lower end portion of the central shaft 53a and an upper position separated by an appropriate distance. The inner paddle 52 has at least two radial paddles with a required width and a base end attached to the stirring shaft (center shaft 53a) with a required inclination angle.

  Further, the stirring shaft 53 (53a, 53b) for supporting the paddles 51, 52 on both the inner and outer sides and the driving thereof are supported by the bearing portion 54 with the stirring shaft (tubular shaft 53b) of the outer paddle 51 at a fixed position. A conduction wheel attached to the shaft (tubular shaft 53b) is rotated by a winding conduction means 57 (for example, a conduction chain) from a servomotor 56 for driving the outer paddle 51 supported by the pedestal 55. Further, the stirring shaft (center shaft 53a) of the inner paddle 52 is supported by the bearing portion 54 and the tubular shaft 53b so as to move up and down, and is fixed at a fixed position by the bearing portion 58a attached to the top of the motor support base 58. The conduction wheel 60 that is supported and supported so as to transmit the rotational force to the central shaft 53a is rotated from the servo motor 59 for driving the inner paddle supported by the motor support 58 with the conduction means 57a. It is configured to be driven. Both the servomotors 56 and 59 have a speed reduction mechanism and are driven at a required rotational speed by a control signal from a separately installed control device (not shown).

  Further, the agitation shaft 53a of the inner paddle 52 and the servo motor 59 for driving the agitation shaft 53a are moved up and down by a driving machine (preferably a servo motor) (not shown) supported by the pedestal 55 (e.g. It is configured to move up and down a required distance while rotating the inner paddle 52 by a known reciprocating machine and guide means such as a drive by a screw shaft or a hydraulic cylinder.

  In the stirrer 1B of this embodiment configured as described above, the rotational speeds of the paddles 51 and 52 of the stirrer 50 and the inner paddles using the characteristics of the servo motor according to the control program in the control unit according to the physical properties of the solution to be handled. If the rotational speed of the inner paddle 52 is increased relative to the rotational speed of the outer paddle 51 by setting the vertical movement timing of the outer paddle 51, the flow of the entire solution in the stirring tank 6B Rotation of the inner paddle 52 causes a stirring action at the center of the tank, and the entire solution is stirred due to the difference in rotational speed between the inner and outer paddles 51 and 52. Therefore, the occurrence of liquid retention in the tank is generated. And the stirring and mixing effect can be remarkably enhanced. Further, by moving the inner paddle up and down in addition to its rotation, the mixing speed of the solution in the tank can be further increased, and the stirring and mixing operation can be performed in a short time, so that the work efficiency can be improved.

  In addition, in the stirring apparatus of this embodiment, it is not limited to the said structure, It cannot be overemphasized that it can change arbitrarily about the shape of a stirring blade and the drive structure of a stirring shaft as needed.

Overall schematic diagram showing one embodiment of a stirring device according to the first invention AA view of FIG. Outline diagram of the stirring tank used in the experiment Diagram showing stirring characteristics when the stirring blades are rotating in the forward direction A diagram showing the agitation characteristics when the agitator blades are rotating in forward and reverse directions Diagram showing stirring characteristics when the stirring blades move up and down A diagram showing the agitation characteristics when the agitator blades are combined with forward / reverse rotation and vertical movement The schematic diagram (a) and top view (b) showing one Embodiment of the stirring apparatus which concerns on 5th invention The longitudinal cross-sectional view showing the outline | summary of one Embodiment of the stirring apparatus which concerns on 6th invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,1A, 1B Stirrer 2,2A Stirrer shaft 3,3A Stirrer blade 4,48 Servo motor for driving the stirrer blade 5 Support member 6,6A, 6B Structure part 14 Top member 15 Linear sleeve 16 Female thread part 23 Actuator support structure member 26 Screw shaft 31 Servo motor for vertical movement 35 Control means 40 Support arm 43 Support base 44 Support frame 45 Motor for support arm turning 47 Vertical drive device 50 Compound type agitator 51 Outer paddle 52 Inner paddle 53 Stirring shaft 55 Pedestal 56 Servo motor for driving outer paddle 59 Servo motor for driving inner paddle

Claims (7)

  Servo motor that rotationally drives a shaft including a stirring blade, a support that supports the servo motor, a vertically moving actuator that moves the shaft including the stirring blade in a vertical direction, and operations of the servo motor and the vertical motion actuator And a control means for controlling the agitation device.   2. The stirring device according to claim 1, wherein the shaft including the stirring blade is configured to be moved up and down by the vertical movement actuator through a support body together with the servo motor.   The support body is slidably supported by the vertical guide member on both sides of the support body, and is connected to and supported by the vertical movement operating member operated by the vertical movement actuator at a position away from the stirring tank. The stirrer according to claim 1 or 2.   3. The stirring device according to claim 1, wherein the vertical movement actuator is a servomotor, and the screw shaft is driven by the servomotor to move the stirring shaft up and down through the support body by a predetermined distance.   A servo motor that rotationally drives a shaft provided with a stirring blade, a shaft provided with the stirring blade and a horizontal joint-type support arm that supports the servo motor, a drive unit that rotates the support arm, and a support body thereof; A vertical drive mechanism and a vertical movement actuator for moving the shaft including the stirring blade in the vertical direction via a support arm; and a control means for controlling operations of the servo motor, a turning drive portion of the support arm and the vertical movement actuator; A stirrer comprising:   A shaft provided with a stirring blade is a double shaft, a vertical paddle type stirring blade is formed on the hollow shaft on the outer side thereof, and a stirring blade rotating on the inner side of the rotation trajectory of the vertical paddle type stirring blade is formed on the central shaft, respectively. These shafts are each driven by a servo motor independently, and the central shaft is moved up and down by a vertical movement actuator to operate each servo motor and vertical movement actuator. A stirring device comprising a control means for controlling.   The paddle type stirring blade is configured to rotate at a position close to the inner side surface of the stirring tank, and has a structure in which a central axis is slidable in the vertical direction within the support shaft and is rotatably supported. The stirrer described.

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