JP5178587B2 - Lifting impeller - Google Patents

Description

  The present invention relates to a lifting impeller.

  2. Description of the Related Art Conventionally, there is known a lift-type impeller configured such that an impeller provided on a vertical axis stirs the water to be treated by being immersed in the water to be treated and rotating, while the vertical axis is configured to be movable up and down. For example, in the apparatus disclosed in Patent Document 1, an elevating device having a vertical axis power source different from the impeller rotating power source is provided, and the impeller rotating power source and the vertical axis are moved up and down by this elevating device. The impeller is raised and lowered.

Japanese Patent Laid-Open No. 11-290885

  However, the apparatus disclosed in Patent Document 1 has a problem of high cost.

  Accordingly, an object of the present invention is to provide a lift-type impeller that is reduced in cost.

Elevating the impeller of the invention, while an impeller provided on the vertical axis for stirring the treatment water by rotating immersed in the water to be treated, in liftable impeller longitudinal axis is configured to be vertically movable, impeller A power source for generating a rotational driving force for rotationally driving the motor, a rotational driving force transmitting means for transmitting the rotational driving force from the power source to the vertical axis and rotating the vertical axis, and a rotation transmitted by the rotational driving force transmitting means A working fluid supply means that is driven by a driving force and is capable of supplying a working fluid, and a cylinder that is vertically movable by the working fluid supplied by the working fluid supply means, and for rotating the impeller This rotational drive force is also used as power for raising and lowering the vertical axis.

In such a lift-type impeller, since the rotational driving force for rotating the impeller is also used as power for moving the impeller up and down, only one power source is required, and there is no need to separately provide a power source for lifting the impeller. . For this reason, cost reduction can be achieved. In addition, the rotational driving force generated by the power source is transmitted by the rotational driving force transmission means, and the vertical axis is rotated by this rotational driving force, while the working fluid supply means is driven to supply the working fluid to the cylinder. As a result, the vertical axis moves up and down and the impeller moves up and down. Thus, the impeller can be raised and lowered using the rotational driving force transmitted by the rotational driving force transmitting means.

  Further, as a configuration that effectively exhibits the above-described operation, specifically, the rotational driving force transmission means is a reduction gear having a plurality of stages of gears, and the working fluid supply means is any one of the plurality of stages of gears. The structure driven by the rotational driving force of the shaft corresponding to one gear is mentioned.

  More specifically, the working fluid can be oil, and the working fluid supply means can be a positive displacement pump.

  Furthermore, if the working fluid is a lubricating oil used for the rotational driving force transmission means, it is not necessary to use a new oil separately, so that the cost can be reduced.

  The working fluid may be air, and the working fluid supply means may be a compressor.

  ADVANTAGE OF THE INVENTION According to this invention, the raising / lowering impeller by which cost reduction was achieved can be provided.

It is a front lineblock diagram showing the raising and lowering impeller concerning a first embodiment of the present invention. It is a figure which shows the principal part of the raising / lowering impeller which concerns on 2nd embodiment. It is a figure which shows the principal part of the raising / lowering impeller which concerns on 3rd embodiment. It is a figure which shows the principal part of the raising / lowering impeller which concerns on 4th embodiment. It is a figure which shows the principal part of the raising / lowering impeller which concerns on 5th embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant descriptions are omitted.

(First embodiment)
FIG. 1 is a front configuration diagram showing a liftable impeller 10 according to a first embodiment of the present invention. This lift-type impeller 10 stirs the water to be treated W by the impeller 2 provided at the lower portion of the vertical axis 1 being immersed and rotated in the water to be treated W such as sewage. It is used in the oxidation ditch where nitrification and denitrification treatment is performed in the circulation channel.

  The elevating impeller 10 transmits an electric motor (power source) 3 that generates a rotational driving force for rotationally driving the vertical axis 1 and the impeller 2, and transmits the rotational driving force from the electric motor 3 to the vertical axis 1. A speed reducer (rotational driving force transmission means) 4 to be rotated, a roots pump (working fluid supply means) 5 connected to a part of the speed reducer 4 and provided above the speed reducer 4, and connected to the roots pump 5 And a cylinder 6 that allows the vertical axis 1 to move up and down.

  The electric motor 3 is installed on the speed reducer 4 in a vertical shape, and can be operated at a predetermined speed (high speed, low speed, fine speed). The output shaft of the electric motor 3 is coupled to the first pinion shaft 4 s of the speed reducer 4 by coupling, whereby the rotational driving force generated in the electric motor 3 is transmitted to the speed reducer 4.

  The speed reducer 4 is a speed reducer that performs three-stage speed reduction by the first gear 4a, the second gear 4b, 4c, the third gear 4d, 4e, and the fourth gear 4f, and the first gear 4a is the first pinion shaft 4s. The second gears 4b and 4c are attached to the second pinion shaft 4p, the third gears 4d and 4e are attached to the third pinion shaft 4q, and the fourth gear 4f is attached to the vertical axis 1, respectively. Here, the vertical axis 1 is engaged with the fourth gear 4f so as to be rotatable together with the fourth gear 4f and movable in the vertical direction, for example, by a spline structure or the like. In the speed reducer 4, the rotational driving force generated in the electric motor 3 is transmitted to the vertical axis 1 while gradually reducing the rotational speed of the output shaft by the three-stage reduction gear, and the vertical axis 1 is rotated at a predetermined speed. Let The reduction gear 4 is filled with a lubricating oil X as a lubricating oil.

  The roots pump 5 is a positive displacement pump, and the two rotors 5a and 5a in the casing rotate synchronously in opposite directions to send out the fluid, so that the fluid can be pumped at a predetermined flow rate. . Further, the drive shaft of the Roots pump 5 is connected to the third pinion shaft 4q of the speed reducer 4, and can rotate in synchronization with the third gear 4d. With this configuration, the roots pump 5 is driven using the rotational driving force transmitted by the speed reducer 4. In FIG. 1, in order to explain the structure of the Roots pump 5, a schematic diagram is shown in which the rotation axis of the rotor 5 a is expressed not perpendicularly to the drive shaft but perpendicularly.

  The Roots pump 5 is provided on a working fluid supply line L1 that connects the inside of the speed reducer 4 and the inside of the cylinder 6, and the lubricating oil X used in the speed reducer 4 is supplied to the speed reducer 4 by driving the rotors 5a and 5a. The air is sucked from the inside and supplied into the cylinder 6 at a predetermined flow rate and pressure. Thus, the Roots pump 5 is configured to be able to supply the lubricating oil X as a working fluid into the cylinder 6.

  This supply line L1 is branched downstream from the Roots pump 5. One line is connected to the lower part of the cylinder 6 as an ascending supply line L1a, and the other line is connected to the upper part of the cylinder 6 as a lowering supply line L1b. Has been. The lines L1a and L1b are provided with a supply-side upward switching valve V1 and a supply-side downward switching valve V2, respectively.

  The cylinder 6 has a cylindrical shape extending in the vertical direction, and accommodates a disk-like piston 1 a provided at the upper portion of the vertical axis 1 so as to be movable in the vertical direction. The piston 1a is connected to the vertical axis 1 so as to be rotatable and not movable in the vertical direction, and moves in the vertical direction while being in watertight contact with the cylinder 6. As the piston 1a moves in the vertical direction, the vertical axis 1 is raised and lowered. As a result, in the liftable impeller 10, the vertical axis 1 can be lifted and lowered by the lubricating oil X supplied by the roots pump 5.

  Further, the cylinder 6 is connected to an upward discharge line L2a at two upper portions and is connected to a downward discharge line L2b at two lower portions. The two connection positions are respectively located above the piston 1a and from the piston 1a when the piston 1a is located at the uppermost position (solid line in FIG. 1) and the lowermost position (lower imaginary line in FIG. 1). Each of the positions corresponds to the lower side. The lines L2a and L2b are each provided with a discharge-side up switching valve V3 and a discharge-side down switching valve V4. These lines L2a and L2b are connected to the lower part of the speed reducer 4 as one discharge line L2.

  According to the raising / lowering impeller 10 having such a configuration, when the aerobic state is formed, the supply side upward switching valve V1 and the discharge side upward switching valve V3 are opened, and the supply side downward switching valve V2 and The discharge side lowering switching valve V4 is closed. In this state, the rotational driving force generated in the electric motor 3 is transmitted by the speed reducer 4, and the vertical driving shaft 1 is rotated and the roots pump 5 is driven by this rotational driving force, and the lubricating oil X is supplied to the cylinder through the supply line L1. 6 is supplied.

  The lubricating oil X supplied to the cylinder 6 flows into the lower side of the piston 1a through the ascending supply line L1a and pushes up the piston 1a, and the lubricating oil X on the upper side of the piston 1a is discharged from the ascending discharge line L2a. Is done. In this way, the vertical axis 1 rises to the position indicated by the solid line in FIG.

  Further, when the anaerobic state is formed, the supply-side lowering switching valve V2 and the discharge-side lowering switching valve V4 are opened, and the supply-side upward switching valve V1 and the discharge-side upward switching valve V3 are closed. In this state, as in the aerobic state formation, the vertical axis 1 is rotated and the lubricating oil X is supplied to the cylinder 6 through the supply line L1.

  Lubricating oil X supplied to the cylinder 6 flows into the upper side of the piston 1a through the lowering supply line L1b and pushes down the piston 1a, and the lubricating oil X below the piston 1a is discharged from the lowering discharge line L2b. Is done. In this way, the vertical axis 1 is lowered to the position indicated by the phantom line in FIG. When the vertical axis 1 moves up and down, the electric motor 3 is operated at a low speed or a slow speed.

  When the vertical axis 1 is moved up and down and the impeller 2 is positioned at the aerobic state formation position, the electric motor 3 is operated at a high speed, and the rotation of the impeller 2 performs aeration and agitation necessary for nitrification. . Further, the lubricating oil X keeps the position of the piston 1a at the uppermost position by continuing to flow in the cylinder 6 from the rising supply line L1a to the rising discharge line L2a.

  On the other hand, when the impeller 2 is located at the anaerobic state forming position, the electric motor 3 is operated at a low speed, and the impeller 2 rotates to perform oxygen-free and stirring necessary for denitrification. Further, the lubricating oil X continues to flow in the cylinder 6 from the descending supply line L1b to the descending discharge line L2b.

  As described above, according to the liftable impeller 10 of the present embodiment, the rotational driving force for rotating the impeller 2 is also used as the power for moving the impeller 2 up and down. There is no need to provide a separate power source. For this reason, cost reduction is achieved.

  Moreover, according to the raising / lowering impeller 10 of this embodiment, since the lubricating oil X used for the reduction gear 4 is utilized, it is not necessary to use new oil separately and cost reduction is achieved.

  Furthermore, in the liftable impeller 10 of this embodiment, since it is not necessary to provide a power source for lifting the impeller, the structure can be simplified.

(Second embodiment)
FIG. 2 is a diagram illustrating a main part of the liftable impeller according to the second embodiment. The liftable impeller 20 shown in FIG. 2 is different from the previous liftable impeller 10 in that cylinder oil is used separately as the working fluid instead of the lubricating oil X, and an oil storage tank 7 for storing the cylinder oil is provided. is there. Along with this, the line L2 is connected not to the inside of the reduction gear 4 but to the roots pump 5, and a storage tank 7 is provided in the middle thereof.

  According to such an elevating impeller 20, the switching valves V <b> 1 to V <b> 4 around the cylinder 6 are opened and closed by the same operation as the operation in the elevating impeller 10, and the cylinder oil in the oil storage tank 7 is transferred to the cylinder 6 by the roots pump 5. , The vertical axis 1 is moved up and down.

(Third embodiment)
FIG. 3 is a diagram illustrating a main part of the liftable impeller according to the third embodiment. 3 is different from the liftable impeller 20 of the second embodiment in that an oil circulation line L3 branched from the supply line L1 and connected to the oil storage tank 7 is provided. The oil circulation line L3 is provided with an oil circulation valve V5.

  According to such a lift type impeller 30, when the vertical axis 1 is raised and lowered, the switching valves V1 to V4 around the cylinder 6 are opened and closed by the same operation as that of the lift type impeller 20, and the oil circulation valve V5 is closed. When the cylinder oil in the oil storage tank 7 is supplied to the cylinder 6 by the roots pump 5, the vertical axis 1 is moved up and down.

  When the vertical axis 1 is moved up and down and the impeller 2 reaches a predetermined position, all the switching valves V1 to V4 are closed and only the oil circulation valve V5 is opened. Thus, the cylinder oil remains filled in the cylinder 6 and the position of the piston 1a is maintained. On the other hand, the cylinder oil circulates through the roots pump 5, the oil circulation line L 3, and the oil storage tank 7 as the roots pump 5 is driven.

(Fourth embodiment)
FIG. 4 is a view showing a main part of a liftable impeller according to the fourth embodiment. The liftable impeller 40 shown in FIG. 4 is different from the liftable impeller 30 of the third embodiment in that air is used instead of cylinder oil as the working fluid, and the compressor 8 and the compressor 8 for supplying air to the cylinder 6 are used. And a pressure tank 9 for compressing and storing the air. Accordingly, an air storage valve V6 is provided in the air supply line L4 for supplying air from the compressor 8 to the pressure tank 9, and a relief valve V7 is provided in the relief line L5 branched from the air supply line L4. . Furthermore, an air supply valve V8 is provided in the supply line L1 that connects the pressure tank 9, the rising supply line L1a, and the falling supply line L1b. The ascending discharge line L2a and the descending discharge line L2b are open to the atmosphere.

  According to such a lift-type impeller 40, the motor 3 is driven in a state in which the relief valve V7 and the air supply valve V8 are closed and only the air storage valve V6 is opened before the vertical axis 1 is raised and lowered. The compressor 8 is driven using the rotational driving force of the speed reducer 4, whereby air is supplied into the pressure tank 9 until a predetermined pressure is reached. Thereafter, the air storage valve V6 is closed, the air supply valve V8 is opened, and the switching valves V1 to V4 around the cylinder 6 are opened and closed by the same operation as the operation in the liftable impeller 30, and the compressed air in the pressure tank 9 is opened and closed. Is supplied to the cylinder 6 so that the vertical axis 1 is moved up and down. At this time, the relief valve V7 is opened, and the air sent out from the compressor 8 is released from the relief line L5.

  When the vertical axis 1 is moved up and down and the impeller 2 reaches a predetermined position, the switching valves V1 to V4 and the air supply valve V8 are closed. Thereby, the cylinder 6 is still filled with air, and the position of the piston 1a is maintained. Then, only the air storage valve V6 is opened, and the air flows into the pressure tank 9 by driving the compressor 8 until a predetermined pressure is reached, and prepares for the next lifting operation. According to the liftable impeller 40, if air is compressed and stored in the pressure tank 9, the vertical axis 1 can be lifted regardless of whether or not the electric motor 3 is operated.

(Fifth embodiment)
FIG. 5 is a view showing a main part of a liftable impeller according to a fifth embodiment. The lifting impeller 50 shown in FIG. 5 is different from the lifting impeller 40 of the fourth embodiment in that the pressure tank 9 and the lines L4 and L5 are eliminated and the supply line L1 is connected to the compressor 8. According to such a lift-type impeller 50, the switching valves V <b> 1 to V <b> 4 around the cylinder 6 are opened and closed by the same operation as that of the lift-type impeller 40, and air is supplied to the cylinder 6 by the compressor 8. The shaft 1 is raised and lowered.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment. For example, in the above embodiment, the Roots pump 5 and the compressor 8 are connected to the third pinion shaft 4q, but may be connected to other shafts. In the above embodiment, the roots pump 5 and the compressor 8 are used as the working fluid supply means. However, a uniaxial screw pump or the like may be used when the working fluid is oil, and a roots pump or the like is used when the working fluid is air. It may be used.

  DESCRIPTION OF SYMBOLS 1 ... Vertical axis, 2 ... Impeller, 3 ... Electric motor (power source), 4 ... Reduction gear (rotation drive force transmission means), 4a, 4b, 4c, 4d, 4e, 4f ... Gear, 4s, 4p, 4q ... Pinion Shaft (shaft), 5 ... Roots pump (working fluid supply means), 6 ... cylinder, 8 ... compressor (working fluid supply means), 10, 20, 30, 40, 50 ... elevating impeller, W ... treated water, X: Lubricating oil (lubricating oil).

Claims (5)

While the impeller provided on the vertical axis stirs the water to be treated by immersing and rotating in the water to be treated, while the vertical impeller is configured to be movable up and down,
A power source for generating a rotational driving force for rotationally driving the impeller;
Rotational driving force transmitting means for transmitting rotational driving force from the power source to the vertical axis and rotating the vertical axis;
A working fluid supply means driven by the rotational driving force transmitted by the rotational driving force transmission means and capable of supplying a working fluid;
A cylinder that enables the vertical axis to be moved up and down by the working fluid supplied by the working fluid supply means ,
A lifting / lowering impeller characterized in that a rotational driving force for rotationally driving the impeller is also used as power for moving the vertical axis up and down . The rotational driving force transmission means is a speed reducer having a plurality of stages of gears,
The working fluid supply means, elevating impeller according to claim 1, characterized in that it is driven by the rotational driving force of the shaft corresponding to one of the gear of said plurality of stages of gears. The working fluid is oil;
The lifting / lowering impeller according to claim 1 or 2, wherein the working fluid supply means is a positive displacement pump. The elevating impeller according to any one of claims 1 to 3 , wherein the working fluid is lubricating oil used for the rotational driving force transmission means. The working fluid is air;
The elevating impeller according to claim 1 or 2, wherein the working fluid supply means is a compressor.

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