Stirring device

Abstract

To provide an agitator in which mounting to and removing from a cradle can be easily performed.SOLUTION: An agitator according to one embodiment comprises: a propeller arranged in fluid; a rotating shaft that is connected to the propeller, and extends upward from the propeller, and at least a portion of which is arranged above the fluid; an interposition part that interposes between the rotating shaft and a cradle; a motor for rotating and driving the rotating shaft; an output shaft that protrudes downward from the motor, and is connected with the rotating shaft; and a supported part that protrudes in a first direction orthogonal to an axial direction from the rotating shaft, and has a downward principal surface. The supported part, in a state where the same is in contact with an upper part of the supporting part installed so as for the downward principal surface to close at least a portion of an opening, before the interposition part is mounted to the cradle, or after the interposition part is removed from the cradle, is supported by the supporting part.SELECTED DRAWING: Figure 5C

Description

[Technical field]

[0001] The present disclosure relates to an agitation device. [Background technology]

[0002] 2. Description of the Related Art Conventionally, agitation devices such as that proposed in Patent Document 1, for example, have been known.

[0003] Patent Document 1 describes a vertical shaft type agitator for agitating water in a tank. This agitator includes a propeller disposed in water, a rotating shaft connected to the propeller, extending upward from the propeller, and disposed so that a part of the propeller is exposed above the water surface, and an impeller attached to an immersed part of the rotating shaft that is immersed in water. The impeller rotates integrally with the rotating shaft to generate a downward or outward water flow, and is configured to generate a water flow that flows downward from the water surface along the rotating shaft, and a water flow that flows on the water surface from around the rotating shaft to the rotating shaft side. A remover that operates in accordance with the rotation of the rotating shaft is provided near the boundary between the immersed part of the rotating shaft that is immersed in water and the exposed part that is exposed above the water surface. The remover is configured to come into contact with scum floating on the water surface near the rotating shaft when the rotating shaft rotates, and to remove the scum from the water surface. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2018-15705 A Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, the fluid to be stirred by the stirring device as disclosed in Patent Document 1 may be stored in a tank having an opening at the top, and a stand may be installed to cover at least a part of the opening. The stirring device may be attached to the stand or detached from the stand, but it may be difficult to perform these operations.

[0006] In view of the above, an object of the present disclosure is to provide a stirring device that can be easily attached to and detached from a stand. [Means for solving the problem]

[0007] In order to solve the above problem, an agitation device according to one embodiment of the present disclosure is an agitation device for agitating a fluid, the fluid being stored in a tank having an opening at an upper portion, a stand being installed to cover at least a portion of the opening, a propeller being disposed in the fluid, a rotating shaft being connected to the propeller and extending upward from the propeller, at least a portion of which is disposed above the fluid, an intervening part being disposed between the rotating shaft and the stand, a motor for driving the rotation of the rotating shaft, an output shaft protruding downward from the motor and connected to the rotating shaft, and a supported part protruding from the rotating shaft in a first direction perpendicular to the axial direction and having a downward-facing main surface, and the support being installed such that the downward-facing main surface covers at least a portion of the opening before the intervening part is attached to the stand or after the intervening part is removed from the stand. To the department The supported portion is supported by the supporting portion in the abutting state.

[0008] According to the above configuration, the downward main surface is the support To the department In the state where the supported portion is in contact with the supporting portion, the supported portion is supported by the supporting portion, and as a result, the stirring device according to the embodiment of the present disclosure can be easily attached to and detached from a stand. Effect of the Invention

[0009] According to the present disclosure, it is possible to provide a stirring device that can be easily attached to and detached from a stand. [Brief description of the drawings]

[0010] [Figure 1]1 is a schematic diagram showing an agitation device according to an embodiment of the present disclosure attached to a stand of a storage tank. [Diagram 2] 1 is a schematic diagram showing an overall configuration of a stirring device according to an embodiment of the present disclosure. [Diagram 3] 1 is a cross-sectional view taken along the axial direction of a shaft, showing a second shaft and its surrounding parts provided in a stirring device according to an embodiment of the present disclosure. FIG. [Figure 4] 1 is a perspective view showing a positioning unit and its surrounding area provided in an agitation device according to an embodiment of the present disclosure. [Figure 5A] FIG. 13 is a schematic diagram for explaining an example of the work of attaching an agitator according to one embodiment of the present disclosure to a stand, showing the state when a storage tank, a first shaft connected to a propeller, a drive unit, and a crane are prepared. [Figure 5B] 13 is a schematic diagram for explaining an example of a process for attaching the stirring device according to an embodiment of the present disclosure to a stand, showing the stand attached to the lid. FIG. [Figure 5C] FIG. 13 is a schematic diagram for explaining an example of a procedure for attaching the stirrer according to an embodiment of the present disclosure to a stand, showing the state when the positioning portion of the first shaft is supported by the support portion. [Figure 5D] FIG. 13 is a schematic diagram for explaining an example of a procedure for attaching the stirring device according to an embodiment of the present disclosure to a stand, and is a partially enlarged view when a positioning portion of a first shaft is fixed to a support portion. [Figure 5E] FIG. 13 is a schematic diagram for explaining an example of a procedure for attaching the stirring device according to an embodiment of the present disclosure to a stand, showing a state in which a drive unit is connected to a first shaft. [Figure 5F] FIG. 13 is a schematic diagram for explaining an example of a process for attaching an agitator according to an embodiment of the present disclosure to a stand, showing the state when the positioning portion of the first shaft is removed from the support portion and the agitator is lifted up. [Figure 5G] 13 is a schematic diagram for explaining an example of a process for attaching an agitator according to an embodiment of the present disclosure to a stand, showing the state when the support portion is removed from the stand and the mounting plate is attached to the stand. FIG. [Figure 6A]FIG. 13 is a schematic diagram for explaining an example of an operation for removing the stirring device according to the embodiment of the present disclosure from the stand, showing the state when the mounting plate is removed from the stand and the stirring device is lifted up. [Figure 6B] FIG. 13 is a schematic diagram for explaining an example of an operation for removing the stirrer according to an embodiment of the present disclosure from a stand, showing a state in which a positioning portion of a first shaft is fixed to a support portion. [Figure 6C] FIG. 13 is a schematic diagram for explaining an example of an operation for removing the stirrer according to an embodiment of the present disclosure from the stand, showing the state when the drive unit has been removed from the first shaft. [Figure 6D] FIG. 13 is a schematic diagram for explaining an example of the operation of removing an agitator according to one embodiment of the present disclosure from a stand, showing the positioning portion of the first shaft being removed from the support portion and the first shaft with the propeller connected thereto being lifted up. [Figure 7A] FIG. 13 is a schematic diagram for explaining a first modified example of the work of mounting the stirrer according to the embodiment of the present disclosure to the stand, and is a partially enlarged view when the positioning portion of the first shaft is fixed to the support portion. [Figure 7B] FIG. 13 is a schematic diagram for explaining a second modified example of the work of mounting the stirrer according to an embodiment of the present disclosure to the stand, and is a partially enlarged view when the positioning portion of the first shaft is fixed to the support portion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, a stirring device according to an embodiment of the present disclosure will be described with reference to the drawings. Note that the present invention is not limited to this embodiment. In the following, the same or corresponding elements are denoted by the same reference numerals throughout the drawings, and duplicated descriptions thereof will be omitted.

[0012] (Storage tank T) FIG. 1 is a schematic diagram showing a state in which the stirring device according to this embodiment is attached to a stand for a storage tank. As shown in FIG. 1, the stirring device 10 according to this embodiment is provided to stir the wastewater W (fluid) in the storage tank T (tank). The storage tank T may be, for example, a combined septic tank or a wastewater treatment tank, or may be another tank. The storage tank T has an opening at the top, and a lid C is provided to close at least a part of this opening. An insertion hole IH is provided in the lid C, and a stand F is erected so as to close at least a part of the insertion hole IH. The storage tank T is configured to keep the height position of the liquid level WS of the wastewater W constant. The stirring device 10 is attached to the stand F via a mounting plate 98.

[0013] (Agitator 10) As shown in FIG. 1, the mixing device 10 comprises a propeller 12 placed in the wastewater W, a shaft 20 (rotating shaft) connected to the propeller 12, extending upward from the propeller 12 and positioned so that at least a portion of it is exposed from the wastewater W, and a motor 70 for rotating the shaft 20.

[0014] (Shaft 20) Fig. 2 is a schematic diagram showing the overall configuration of the stirring device according to this embodiment. Fig. 3 is a cross-sectional view along the axial direction of the shaft, showing a second shaft and its surrounding parts provided in the stirring device. As shown in Figs. 2 and 3, the shaft 20 has a first shaft 22 connected to the propeller 12, and a second shaft 32 connected to the first shaft 22 on the opposite side to the propeller 12. The first shaft 22 and the second shaft 32 are coaxially connected to each other.

[0015] (First shaft 22) The first shaft 22 has a main shaft portion 24 connected to the propeller 12, and a sub-shaft portion 26 interposed between the main shaft portion 24 and the second shaft 32. The main shaft portion 24 and the sub-shaft portion 26 are coaxially connected to each other.

[0016] 3, the shaft main section 24 has an axial hole 24c and is formed mainly hollow. An end 24b of the shaft main section 24 on the second shaft 32 side is provided with a disk-shaped flange 25. An end 26a of the shaft sub section 26 on the propeller 12 side is provided with a disk-shaped flange 27 corresponding to the flange 25 of the shaft main section 24.

[0017] The flanges 25, 27 may be fixed to each other, for example, by a plurality of bolts. The heads of the bolts may be welded to the flange 25 or the flange 27, or any other method used for fastening flanges together may be used. For example, in this manner, the end 26a of the shaft sub-section 26 may be firmly connected to the end 24b of the shaft main section 24.

[0018] A flange 82 is provided on the end 26b of the shaft sub-section 26 opposite the propeller 12. The flange 82 protrudes from the shaft section of the shaft sub-section 26 in a first direction perpendicular to the axial direction. The flange 82 is disposed at a predetermined distance from the mounting plate 98 in the axial direction of the shaft 20.

[0019] (Second shaft 32) The second shaft 32 is connected to the shaft sub-section 26. Specifically, the end of the second shaft 32 on the propeller 12 side is inserted into the shaft hole 26c of the shaft sub-section 26 and is connected to the inner wall of the shaft hole 26c via a key member 44. The end of the second shaft 32 on the propeller 12 side may be fixed to the shaft sub-section 26 using a fastener such as a nut. The end face 32a on the propeller 12 side of the second shaft 32 is exposed from the opening on the propeller 12 side of the shaft hole 26c of the shaft sub-section 26 and is located in the shaft hole 24c of the shaft main section 24. The second shaft 32 extends upward from the end face 32a on the propeller 12 side, and the end 32b on the opposite side to the propeller 12 is connected to the output shaft 72 of the motor 70. Although the method of connecting the second shaft 32 and the output shaft 72 is not shown, various methods of connecting between rotating shafts can be adopted.

[0020] According to the above-described structure, the torque of the motor 70 is transmitted to the second shaft 32, the shaft sub-portion 26, and the shaft main portion 24 in that order.

[0021] In this embodiment, the stirring device 10 further includes a cylindrical first housing 40 (intermediate portion) that contains a part of the second shaft 32. A flange 41 is provided on an end 40a of the first housing 40 on the propeller 12 side, and a flange 42 is provided on an end 40b of the first housing 40 opposite the propeller 12.

[0022] A double row tapered roller bearing 50 is provided in the shaft hole 40c of the first housing 40 to rotatably support the second shaft 32 within the first housing 40. In order to avoid visual clutter, the cross section of the double row tapered roller bearing 50 is shown in a simplified manner in FIG. 3. Here, the mounting plate 98 shown in FIG. 1 is attached to the lower surface of the flange 41. That is, in this embodiment, the second shaft 32 is supported by a frame F provided above the wastewater W via the first housing 40, the double row tapered roller bearing 50, and the mounting plate 98. Therefore, in this embodiment, the first housing 40, the double row tapered roller bearing 50, and the mounting plate 98 constitute an intermediate portion 60 interposed between the second shaft portion 92 described later and the frame F.

[0023] In this embodiment, the stirring device 10 further includes a cylindrical second housing 45 that contains another part of the second shaft 32 and an output shaft 72 of the motor 70. A flange 46 is provided at an end 45a of the second housing 45. This flange 46 is fixed to the flange 42 of the first housing 40. A cylindrical roller bearing 52 that rotatably supports the second shaft 32 within the second housing 45 is provided in an axial hole 45c of the second housing 45. Note that in order to avoid visual complication, the cross section of the cylindrical roller bearing 52 is shown in a simplified manner in FIG. 3.

[0024] (Positioning portion 100 and first connecting portion 110) Fig. 4 is a perspective view showing a positioning portion and its surroundings provided in the stirring device according to this embodiment. As shown in Fig. 4, the stirring device 10 according to this embodiment further includes two positioning portions 100, 100 (supported portions) protruding from the first shaft 22 in a first direction perpendicular to the axial direction, and two first connecting portions 110, 110 (connecting portions) for connecting a rope R (see Fig. 5A, etc.) of a crane.

[0025] The first connecting parts 110, 110, for example, by adjusting the length of the rope R of the crane CR connected to each of them, make it possible to tilt the first shaft 22 with respect to the vertical direction when attaching the first shaft 22 connected to the propeller 12 to the supports S, S (see FIG. 5C, etc.). By tilting the first shaft 22 in this way, when the propeller 12 is larger than the insertion hole IH provided in the storage tank T in a plan view, it becomes possible to insert the propeller 12 into the insertion hole IH.

[0026] The positioning units 100, 100 are provided at the same position in the axial direction of the shaft 20, and on opposite sides (positions rotated 180° from each other) in the circumferential direction of the shaft 20. Since the positioning units 100, 100 have the same structure, the following description will only describe one of the positioning units 100, and similar descriptions of the other positioning unit 100 will not be repeated.

[0027] The positioning part 100 has a downward main surface 102. The positioning part 100 is plate-shaped extending in a first direction perpendicular to the axial direction. The positioning part 100 has two through holes 104, 104 penetrating in the axial direction of the shaft 20, and is fixed to the support part S (see FIG. 5C, etc.) by screw members SC (fixing devices; see FIG. 5D) inserted into the through holes 104, 104, respectively. In this embodiment, the support part S is fixed to the stand F by a known fixing method.

[0028] The first connecting portions 110, 110 are provided at the same position in the axial direction of the shaft 20, and are provided on opposite sides (positions rotated 180° from each other) in the circumferential direction of the shaft 20. Since the first connecting portions 110, 110 have the same structure, the following description will only describe one of the first connecting portions 110, and similar descriptions of the other first connecting portion 110 will not be repeated.

[0029] The first connecting portion 110 has a main portion 111 that protrudes from directly above the positioning portion 100 on the first shaft 22 in a first direction perpendicular to the axial direction, and has a main surface 112 facing a second direction perpendicular to the axial direction and the first direction, and a connecting hole 114 that penetrates the main portion 111 in the second direction. The main portion 111 is plate-shaped, and is provided between the two through holes 104, 104 of the positioning portion 100 in the circumferential direction of the first shaft 22.

[0030] (An example of installation of the stirring device 10) An example of the installation procedure of the stirrer 10 according to this embodiment on the stand F will be described with reference to FIGS. 5A to 5G.

[0031] First, as shown in FIG. 5A, a storage tank T is provided with an opening at the top of which at least a portion is blocked with a lid C. A crane CR is prepared for lifting and moving the first shaft 22 to which the propeller 12 is connected and the drive unit 30, which is the portion of the agitator 10 excluding the propeller 12 and the first shaft 22, with a rope R.

[0032] Next, as shown in FIG. 5B, the rope R of the crane CR is connected to the upper part of the stand F, and the stand F is lifted and moved by the crane CR, and the stand F is attached to the lid C of the storage tank T so as to block at least a portion of the insertion hole IH provided in the lid C.

[0033] 5C, the rope R of the crane CR is connected to the flange 25 of the first shaft 22 to which the propeller 12 is connected, and the first shaft 22 is hoisted and moved by the crane CR, so that the propeller 12 protrudes below the frame F, and the positioning part 100 and a part of the first shaft 22 protrude above the frame F. The rope R may be connected to the connecting hole 114 to hoist the first shaft 22. A gap large enough to accommodate the support part S is provided between the frame F and the positioning part 100.

[0034] Next, two support parts S, S are placed on the upper part of the frame F in positions where they can support the positioning part 100 from below. Here, the lower surfaces of the support parts S, S may be fixed to the upper surface of the frame F by screw members SC', as shown in FIG. 5D.

[0035] Thereafter, by lowering the first shaft 22, the positioning unit 100 is supported by the supports S, S with the downward main surface 102 abutting against the upper portions of the supports S, S, as shown in the figure. Note that in this embodiment, the support S is configured to be supported by the stand F, but the support S may be disposed so as to span the opening at the top of the storage tank T, or the insertion hole IH of the lid C.

[0036] 5D, screw members SC (fixing devices) are inserted into the through holes 104, 104 of one positioning portion 100, and the one positioning portion 100 is fixed to one support portion S by the screw members SC. Similarly, screw members SC (same as above) are inserted into the through holes 104, 104 of the other positioning portion 100, and the other positioning portion 100 is fixed to the other support portion S by the screw members SC. In this manner, the positioning portions 100, 100 are supported by the supports S, S with the downward main surfaces 102, 102 abutting against the upper portions of the supports S, S supported by the frame F, thereby making it possible to position the first shaft 22 to which the propeller 12 is connected.

[0037] Next, as shown in Fig. 5E, the rope R of the crane CR is connected to the two second connecting parts 120, 120 provided directly below the motor 70 of the drive part 30, the drive part 30 is hoisted and moved by the crane CR, the flange 27 of the drive part 30 is fixed to the flange 25 of the first shaft 22 to which the propeller 12 is connected, and the drive part 30 is connected to the first shaft 22. In this way, the agitator 10 is completed. At this time, the state in which the rope R of the crane CR is connected to the two second connecting parts 120, 120 is maintained.

[0038] Furthermore, as shown in FIG. 5F, the support parts S, S are released from the frame F, and the agitator 10 is lifted up by the crane CR, after which the support parts S, S are removed from the frame F.

[0039] Finally, as shown in FIG. 5G, the agitator 10 is lowered by the crane CR, and the mounting plate 98 is attached to the stand F.

[0040] (Function and effect when the stirring device 10 is attached to the stand F) As described above, in this embodiment, before the mounting plate 98 is attached to the pedestal F, the positioning unit 100 can be supported and positioned by the support unit S in a state where the downward main surface 102 is in contact with the upper part of the support unit S supported by the pedestal F. This results in a state where the flange 25 of the first shaft 22 is positioned above the support units S, S, as shown in FIG. 5E, making it possible to easily connect the drive unit 30 to the first shaft 22 to which the propeller 12 is connected. As a result, the stirring device 10 according to this embodiment can be easily attached to the pedestal F.

[0041] Furthermore, in this embodiment, since the positioning portion 100 is plate-shaped extending in a first direction perpendicular to the axial direction of the shaft 20, the positioning portion 100 can be positioned relative to the support portion S in a simple structure and in a stable state.

[0042] Furthermore, the stirring device 10 of this embodiment is provided with a first connecting portion 110 that protrudes from directly above the positioning portion 100 in a first direction perpendicular to the axial direction of the shaft 20, so that the positioning portion 100 and the first connecting portion 110 reinforce each other, thereby improving the strength of the stirring device 10.

[0043] Furthermore, in this embodiment, the positioning portion 100 is fixed to the support portion S by screw members SC, SC inserted into the through holes 104, 104, so that the first shaft 22 to which the propeller 12 is connected can be positioned relative to the support portion S in a stable state.

[0044] Furthermore, since the stirring device 10 of this embodiment is equipped with two positioning parts 100, 100, it is possible to position the first shaft 22 to which the propeller 12 is connected relative to the support part S in a stable state, compared to the case in which only one positioning part 100 is provided.

[0045] (An example of removal of the stirring device 10) An example of the operation of removing the stirrer 10 according to this embodiment from the stand F will be described with reference to FIGS. 6A to 6D.

[0046] First, as shown in FIG. 6A, after the mounting plate 98 is removed from the stand F, the rope R of the crane CR is connected to the two second connecting parts 120, 120, and the agitator 10 is lifted up by the crane CR.

[0047] Next, as shown in Fig. 6B, two support parts S, S are attached to the upper part of the stand F. Here, the two support parts S, S are arranged to sandwich the first shaft 22, and are fixed to the stand F as shown in Fig. 5D. Also, as shown in Fig. 6B, by lowering the stirring device 10 by the crane CR, the positioning parts 100, 100 are supported by the support parts S, S in a state where the downward main surfaces 102, 102 of the positioning parts 100, 100 abut against the upper parts of the support parts S, S.

[0048] 6B, similarly to the case described based on FIG. 5D, screw members SC (fixing devices) are inserted into the through holes 104, 104 of one positioning part 100, and the one positioning part 100 is fixed to one support part S by the screw members SC. Similarly, screw members SC (same as above) are inserted into the through holes 104, 104 of the other positioning part 100, and the other positioning part 100 is fixed to the other support part S by the screw members SC.

[0049] Furthermore, as shown in FIG. 6C, the flange 27 of the drive unit 30 is removed from the flange 25 of the first shaft 22, and the drive unit 30 is lifted up by the crane CR.

[0050] Finally, as shown in Fig. 6D, the rope R of the crane CR is connected to the flange 25 of the first shaft 22 to which the propeller 12 is connected, and the first shaft 22 is lifted and moved by the crane CR, thereby removing the propeller 12 and the first shaft 22 from the frame F. The rope R may be connected to the connecting hole 114 to lift the first shaft 22. At this time, the supports S, S are also removed from the frame F, as shown in the same figure.

[0051] (Function and effect when removing the stirring device 10 from the stand F) As described above, in this embodiment, before the mounting plate 98 is removed from the stand F, the positioning unit 100 can be supported and positioned by the support unit S in a state where the downward main surface 102 is in contact with the upper part of the support unit S supported by the stand F. As a result, as shown in FIG. 6B, the flange 25 of the first shaft 22 is positioned above the stand F, so that the drive unit 30 can be easily removed from the first shaft 22 to which the propeller 12 is connected. As a result, the stirring device 10 according to this embodiment can be easily removed from the stand F. By fixing the support unit S to the stand F, the work can be carried out more stably.

[0052] Furthermore, other actions and effects when removing the agitator 10 from the stand F are similar to those when attaching the agitator 10 to the stand F described above, and therefore will not be described again here.

[0053] Instead of completely removing the agitator 10 from the stand F as described above, as shown in FIG. 6C, the drive unit 30 may be removed from the first shaft 22 to which the propeller 12 is connected, and the first shaft 22 to which the propeller 12 is connected may be left fixed to the supports S, S. This makes it possible to easily perform maintenance work on the removed drive unit 30. The first shaft 22 to which the propeller 12 is connected may be protected by, for example, covering the opening at the top with a separate member to prevent dust, moisture, and the like from entering the inside.

[0054] (Modification) From the above description, many improvements and other embodiments of the present invention will be apparent to those skilled in the art. Therefore, the above description should be construed as merely illustrative and is provided for the purpose of teaching those skilled in the art the best mode for carrying out the present invention. Details of the structure and / or function thereof may be substantially changed without departing from the spirit of the present invention.

[0055] Fig. 7A is a schematic diagram for explaining a first modified example of the work of attaching the stirring device according to the above embodiment to the pedestal, and is a partially enlarged view when the positioning part of the first shaft is fixed to the support part. The stirring device 10 according to this modified example and the work of attaching the stirring device 10 to the pedestal F are the same as those in the above embodiment, except for the structure of the support part S described based on Fig. 5D and the manner in which the support part S is fixed to the pedestal F. Therefore, the same parts are given the same reference numerals, and similar descriptions will not be repeated.

[0056] As shown in Fig. 7A, the support S' according to this modification has a flange SF on its lower surface. This flange SF is fixed to the upper surface of the stand F by screw members SC''. The support S' may be fixed to the stand F in this manner.

[0057] 7B is a schematic diagram for explaining a second modified example of the work of attaching the stirring device to the pedestal according to the above embodiment, and is a partially enlarged view when the positioning part of the first shaft is fixed to the support part. The stirring device 10 according to this modified example and the work of attaching the stirring device 10 to the pedestal F are the same as those of the above embodiment, except for the structures of the support part S and the pedestal F and the manner in which the support part S is fixed to the pedestal F, which are explained based on FIG. 5D. Therefore, the same parts are given the same reference numerals, and similar explanations will not be repeated.

[0058] As shown in FIG. 7B, the support S' according to this modification has a flange SF on its lower surface, similar to the first modification. The mount F' according to this modification has a flange FF on its upper surface, which corresponds to the flange SF of the support S'. The flange SF of the support S' and the flange FF of the mount F are fixed to each other by a so-called C-clamp SP. The support S' may be fixed to the mount F' in such a fixing manner. For example, a flange may be provided on the upper surface of the support S', and the flange and the downward main surface 102 of the positioning portion 100 may be fixed to each other by the C-clamp SP.

[0059] In the above embodiment, for example, as shown in Fig. 5A, a case has been described in which the first shaft 22 is prepared in a state in which it is connected to the propeller 12 in advance. However, the present invention is not limited to this case, and the propeller 12 may be placed in advance at the bottom of the storage tank T, and the first shaft 22 may be moved by a crane CR and connected to the propeller 12 inside the storage tank T.

[0060] In the above embodiment, the stirrer 10 is disposed in the storage tank T with a portion of the shaft 20 positioned above the stand F. However, this is not limited to the above case. For example, the output shaft 72 of the motor 70 may extend below the stand F, and the stirrer 10 may be disposed in the storage tank T with the entire shaft 20 positioned below the stand F.

[0061] In the above embodiment, a case has been described in which the stand F and the support part S are provided separately, the upper surface of the stand F and the lower surface of the support part S are fixed to each other by the screw member SC', and the upper surface of the support part S and the downward main surface 102 of the positioning part 100 are fixed to each other by the screw member SC. However, this is not limited to this case, and for example, the support part may be configured as the stand F, or may be configured as a beam installed in the insertion hole IH of the stand F, or may be configured as a beam installed directly at the opening of the storage tank T without providing the stand F at the opening.

[0062] In the above embodiment, a case has been described in which the supported portion is configured as a positioning portion 100 that is fixed and positioned by a screw member SC on the upper surface of the support portion S. However, the present invention is not limited to this case, and the supported portion may not be fixed and positioned on the support portion, but may simply be supported by the support portion.

[0063] In the above embodiment, a case has been described in which the positioning unit 100 can be supported and positioned by the support unit S in a state in which the downward-facing main surface 102 is in contact with the upper part of the support unit S supported by the gantry F. However, the present invention is not limited to this case, and by changing the shape of at least one of the positioning unit 100 and the gantry F, the positioning unit 100 may be supported and positioned by the gantry F in a state in which the downward-facing main surface 102 is in contact with the upper part of the gantry F.

[0064] In the above embodiment, a description has been given of a case in which the positioning portion 100 is plate-shaped extending in a first direction perpendicular to the axial direction of the first shaft 22. However, the present invention is not limited to this case, and the positioning portion 100 may have another shape (e.g., a hemispherical shape, a cubic shape, etc.) having a downward-facing main surface 102.

[0065] In the above embodiment, a description has been given of a case in which two positioning units 100 are provided. However, the present invention is not limited to this case, and one positioning unit 100 or three or more positioning units 100 may be provided.

[0066] (summary) In order to solve the above problem, an agitation device according to one embodiment of the present disclosure is an agitation device for agitating a fluid, the fluid being stored in a tank having an opening at an upper portion, a stand being installed to cover at least a portion of the opening, a propeller being disposed in the fluid, a rotating shaft being connected to the propeller and extending upward from the propeller, at least a portion of which is disposed above the fluid, an intervening part being disposed between the rotating shaft and the stand, a motor for driving the rotation of the rotating shaft, an output shaft protruding downward from the motor and connected to the rotating shaft, and a supported part protruding from the rotating shaft in a first direction perpendicular to the axial direction and having a downward-facing main surface, and the support being installed such that the downward-facing main surface covers at least a portion of the opening before the intervening part is attached to the stand or after the intervening part is removed from the stand. To the department The supported portion is supported by the supporting portion in the abutting state.

[0067] According to the above configuration, the downward main surface is the support To the department In the state where the supported portion is in contact with the supporting portion, the supported portion is supported by the supporting portion, and as a result, the stirring device according to the embodiment of the present disclosure can be easily attached to and detached from a stand.

[0068] The supported portion may be in the form of a plate extending in the first direction.

[0069] According to the above configuration, the supported portion can be supported by the supporting portion in a stable state with a simple structure.

[0070] The device may further include a connecting portion for connecting a crane rope, the connecting portion having a main portion that protrudes from directly above the supported portion of the rotating shaft in the first direction and has a main surface facing a second direction perpendicular to the axial direction and the first direction, and a connecting hole that penetrates the main portion in the second direction.

[0071] According to the above configuration, the supported portion and the connecting portion reinforce each other, and it is possible to improve the strength of the stirring device.

[0072] The supported portion has a through hole penetrating in the axial direction of the rotation shaft, and is fixed to the supporting portion by a fastener inserted into the through hole.

[0073] According to the above configuration, the supported portion can be supported by the supporting portion in a stable state.

[0074] The support member may include a plurality of supported portions, and the plurality of supported portions may be provided at the same position in the axial direction of the rotation shaft.

[0075] According to the above configuration, the supported portion can be supported by the supporting portion in a stable state, compared to a case where only one supported portion is provided. [Explanation of symbols]

[0076] 10 Stirring device 12 Propeller 20 Shaft (rotating axis) 22 First Shaft 24 Main shaft section 26 Shaft sub-section 30 Drive unit 32 Second Shaft 40 1st cabinet (cabinet) 44 Spacer 45 2nd cabinet 50 Double row tapered roller bearing 52 Cylindrical roller bearing 60 Interposition 70 Motor 72 Output shaft 82 Flange 85 Fall prevention part 90 Expected breakage area 98 Mounting plate 100 Positioning part 102 Downward facing principal surface 104 Through hole 110 1st connection part (connection part) 111 Main 112 Main surface 114 Connection hole 120 2nd connection part C Lid F Mount S support part IH insertion hole T storage tank SC Screw material (fixture) W Wastewater (fluid) WS Liquid Level CR Crane

Claims

1. 1. A stirring device for stirring a fluid, comprising: The fluid is stored in a tank having an opening at an upper portion, and a stand is installed to cover at least a part of the opening; a propeller disposed within the fluid; and a rotating shaft connected to the propeller, extending upward from the propeller, and at least a portion of the rotating shaft being disposed above the fluid; an interposition portion interposed between the rotation shaft and the base; A motor for rotating the rotary shaft; an output shaft protruding downward from the motor and connected to the rotary shaft; A supported portion protruding from the rotation shaft in a first direction perpendicular to the axial direction and having a downward main surface, A stirring device characterized in that the supported portion is supported by a support portion installed on an upper portion of the stand with the downward main surface abutting the support portion so as to cover at least a portion of the opening before the intervening portion is attached to the stand or after the intervening portion is removed from the stand.

2. The stirring device according to claim 1 , wherein the supported portion is in the form of a plate extending in the first direction.

3. A stirring device for stirring a fluid, comprising: The fluid is stored in a tank having an opening at an upper portion, and a stand is installed to cover at least a part of the opening; a propeller disposed within the fluid; and a rotating shaft connected to the propeller, extending upward from the propeller, and at least a portion of the rotating shaft being disposed above the fluid; an interposition portion interposed between the rotation shaft and the base; A motor for rotating the rotary shaft; an output shaft protruding downward from the motor and connected to the rotary shaft; A supported portion protruding from the rotation shaft in a first direction perpendicular to the axial direction and having a downward main surface, Before the intermediate portion is attached to the stand or after the intermediate portion is removed from the stand, the supported portion is supported by the supporting portion in a state in which the downward main surface is in contact with a supporting portion that is installed so as to close at least a portion of the opening, Further comprising a connection portion for connecting a rope of a crane, The connecting portion of the stirring device has a main portion that protrudes from directly above the supported portion of the rotating shaft in the first direction and has a main surface facing a second direction perpendicular to the axial direction and the first direction, and a connecting hole that penetrates the main portion in the second direction.

4. A stirring device for stirring a fluid, comprising: The fluid is stored in a tank having an opening at an upper portion, and a stand is installed to cover at least a part of the opening; a propeller disposed within the fluid; and a rotating shaft connected to the propeller, extending upward from the propeller, and at least a portion of the rotating shaft being disposed above the fluid; an interposition portion interposed between the rotation shaft and the base; A motor for rotating the rotary shaft; an output shaft protruding downward from the motor and connected to the rotary shaft; A supported portion protruding from the rotation shaft in a first direction perpendicular to the axial direction and having a downward main surface, Before the intermediate portion is attached to the stand or after the intermediate portion is removed from the stand, the supported portion is supported by the supporting portion in a state in which the downward main surface is in contact with a supporting portion that is installed so as to close at least a portion of the opening, The supported portion has a through hole penetrating in the axial direction of the rotating shaft, and is fixed to the supporting portion by a fastener inserted into the through hole.

5. The support member includes a plurality of supported portions, The stirring device according to claim 1 , wherein the plurality of supported portions are provided at the same position in the axial direction of the rotation shaft.

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