JP2006326378A - Underwater stirrer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an underwater stirrer capable of highly efficiently and uniformly stirring the entire inside of a tank by a continuous operation over a long period of time with low power. <P>SOLUTION: A stirring body 2 which has a projected stirring blade 3 and is formed so as to be rotated by receiving the resistance of a stirring fluid W when floating, sinking, rising or falling inside a stirring tank 1 with the introduced stirring fluid W. Also, the stirring body 2 is constituted so as to float and sink by changing buoyancy by housing a prescribed amount of a fluid w inside the stirring body 2 and changing the volume of the stirring body 2 by supplying and discharging the fluid w to/from a flexible tank 4 disposed on the outside or at the outer peripheral part of the stirring body 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an underwater stirrer, and in particular, by moving the lifting body volume of the underwater stirrer up and down by changing the movement of the internal fluid in the upper position where it floated and the lower position where it sinks, The present invention relates to an underwater stirrer that can perform uniform stirring of a stirring fluid in a stirring tank over a long period of time by power.

  Conventionally, in sewage treatment, construction wastewater treatment, etc., when treating a fluid such as sewage containing impurities such as earth and sand, sludge, for example, when treating sludge water, flocculant, sterilizing A chemical such as an agent is put into a stirring tank to which sludge water is supplied, and is stirred by an underwater stirrer that is similarly put into the stirring tank to perform a required treatment such as aggregation and sterilization.

  By the way, an underwater stirrer forcibly stirs the entire tank by rotating a stirring blade with a driving body such as a motor to rotate liquid or fluid, and circulating in the tank using a water flow generated thereby. However, in this method, since the stirring power becomes large, electric power is taken in from the outside, so it cannot be used in a place where there is no commercial power. Therefore, there is a problem that the power cost increases and the running cost becomes high.

Therefore, the weight of the submerged stirrer is moved up and down by changing the sludge water contained in the submerged stirrer by the suction and discharge of the pump installed inside, and the stirring blade disposed on the outer periphery of the submerged stirrer There has been proposed an underwater agitator configured to rotate by receiving the resistance of sludge water in the agitation tank during its vertical movement.
However, this submerged stirrer directly feeds and drains part of the sludge water in the agitation tank, so if the sludge water contains a lot of foreign matter (foreign matter) like sewage, the filter or pump that sucks and discharges is clogged. Has occurred, making long-term continuous operation impossible, and often requiring maintenance.

  In view of the problems of the conventional underwater stirrer, the present invention provides an underwater stirrer that can perform uniform stirring over a long period of continuous operation with low power and high efficiency throughout the tank. Objective.

  In order to achieve the above object, the underwater agitator of the present invention is an underwater agitator that is rotated by a stirring blade disposed on the outer periphery due to the sludge water resistance in the agitation tank when it moves up and down due to its ups and downs. The volume of the stirring body is changed by the movement of the fluid in the stirring body, and the structure is configured to move up and down in the tank stirring fluid.

  In this case, it is possible to change the volume of the agitator body by moving the fluid contained in the agitator body by supplying and discharging the fluid into and out of a flexible tank disposed outside the agitator body. .

  Further, it is possible to detect the ascending / descending position of the stirrer that floats and sinks and to move the fluid stored inside the stirrer by driving the pump with a drive energy source provided inside the stirrer.

  Moreover, it can comprise so that the raising / lowering position of a stirring body may be detected with the sensor arrange | positioned at the stirring body.

  Moreover, it can comprise so that a drive energy source can be set as a storage battery and can be charged and charged in non-contact in the raising position of a stirring body.

  In addition, a flexible tank provided outside is manufactured so as to change its volume with a shape memory alloy, and a change in temperature of the stirrer ascending / descending position is detected and changed to supply fluid in the stirrer. It can be configured to drain.

  According to the stirrer of the present invention, the agitator blades disposed on the outer periphery of the agitator are submersible agitators that are rotated by receiving the resistance of sludge water in the agitation tank during the vertical movement due to the ups and downs. By changing the volume of the stirring body by moving the pump, and moving up and down in the stirring fluid in the tank and moving up and down, thereby supplying and discharging the fluid by making the contained fluid clean water, Clogging of piping and the like can be prevented in advance, and long-term continuous operation is possible. Even in a high-depth tank or the like, uniform stirring of the stirring fluid in the stirring tank can be easily performed with low power.

  In addition, the fluid contained in the stirrer is configured to change the volume of the stirrer main body by supplying and discharging the fluid into and out of a flexible tank disposed outside the stirrer. The body can be floated and settled easily and reliably, and stirring can be easily performed regardless of the properties of the stirring fluid.

  In addition, by detecting the raising / lowering position of the stirring body and driving the pump by the drive energy source provided in the stirring body to move the fluid stored in the stirring body, the stirring body can be moved up and down. Floating and sinking can be automatically switched, and the stirring fluid can be easily and continuously stirred.

  In addition, by configuring the ascending / descending position of the agitator with a sensor disposed on the agitator, it is easy to detect the ascending / descending position of the agitator, and the supply / discharge switching of the fluid to the external tank is reliable. Can be done.

  In addition, by using a storage battery as the drive energy source and enabling power supply without contact when the stirrer is raised, it is possible to easily supply the necessary power without supplying power from the outside with a power supply cable or the like. it can.

  In addition, a flexible tank arranged outside is manufactured so as to change its volume with a shape memory alloy, and the temperature change during raising and lowering of the stirring body is detected to supply and discharge the fluid in the stirring body. By configuring, it is possible to change the volume of the stirrer simply and surely by only changing the temperature of the raising / lowering position of the stirrer, and the structure can be simplified.

  Hereinafter, embodiments of the stirrer of the present invention will be described with reference to the drawings.

1 to 4 show an embodiment of the stirrer of the present invention.
This underwater stirrer A has a stirring body provided with a stirring blade 3 formed so as to rotate in response to the resistance of the stirring fluid W when it rises and falls in the stirring tank 1 into which the stirring fluid W such as sewage is introduced. 2, and a mechanism for changing the buoyancy of the stirrer 2, specifically, a predetermined amount of fluid w is accommodated in the stirrer, and the fluid w is placed outside or on the outer periphery of the stirrer 2. The buoyancy is changed by changing the volume of the stirrer 2 by supplying and discharging into the flexible tank 4 arranged, so that it floats and sinks. The uniform stirring of the stirring fluid W in the stirring tank can be performed efficiently and reliably.

The agitation tank 1 is not particularly limited, and has a shape capable of agitating the agitation fluid W such as a cube or a rectangle having a required internal volume, and supplies the agitation fluid W to be agitated into the agitation tank 1. In addition to being configured so that the treated water after stirring can be drained, the guide bar 5 as a guide mechanism is attached to the stirring body support frame 7 disposed in the upper part of the stirring tank so as to be directly suspended vertically, or the stirring body A guide bar support 6 is attached to the support frame 7, and the guide bar 5 is attached to the guide bar support 6, so that the stirrer 2 of the underwater agitator A floats and moves up and down in the stirring tank 1 at a specified position. To.
In addition, although the upper surface of this stirring tank 1 is opening, it can also be set as a sealing type.

As shown in FIGS. 1 to 2, the stirring body 2 is formed in a cylindrical tank shape in which a through hole 21 is formed so as to penetrate vertically in the central portion of the stirring body main body, and is formed on the outer peripheral surface of the stirring body main body. In the illustrated embodiment, a plurality of stirring blades 3 are provided so as to protrude radially at substantially equal intervals, whereby the stirring body 2 floats and moves up and down. When agitating, the agitating blade 3 floats and sinks, that is, ascends or descends while rotating the agitator 2 by the resistance of the liquid.
The size, shape and number of the stirring blades 3 are not particularly limited, and correspond to the size of the stirring tank.

Further, the stirring body 2 is a sealed tank type, and a flexible tank 4 is provided outside, and a predetermined amount of clean fluid w inside the stirring body is not particularly limited. For example, clean water such as tap water is accommodated, and this fluid w is supplied to and drained from an external tank by a fluid supply / discharge means, thereby changing the volume of the agitator and changing its buoyancy to move it up and down.
As a result, the clean fluid w contained in the stirring body does not clog the water supply / drainage channel, so that it can be operated continuously for a long time without any trouble such as clogging.
Further, the tank-shaped stirring body 2 is formed with a through hole 21 so as to penetrate vertically through the center thereof, and the guide rod 5 is penetrated into the through hole 21. As a result, when the stirrer 2 moves up and down in the stirrer 1, the guide rod 5 guides the constrained plane position range when the stirrer 2 is moved up and down so that it can be lifted and lowered smoothly.

The liquid supply / discharge means for the external tank 4 is not particularly limited. For example, the pump P that can be supplied / discharged, the storage battery B that can be charged in a non-contact manner as the power source for driving the pump, and the stirring The sensor C and the controller CT that detect the ascending / descending position of the body 2 are configured, and are arranged so as to be electrically connected to the stirring body 2.
In addition, D is a ground charging device arranged outside the tank so that the storage battery B can be charged between the non-contact electrodes when the stirrer 2 floats.
The sensor C is not particularly limited. For example, a pressure sensor is used to detect the depth of the stirrer 2 and detect the ascending position or the descending descending position. .

  The flexible tank 4 attached to the outside of the stirring body 2 is not particularly limited. For example, as shown in FIGS. 1, 2, and 4, the flexible bellows is made of rubber or synthetic resin. By the supply and discharge of the fluid w from the stirring body 2 by the pump P, the tank 4 expands as shown in the right half of FIG. 2 or contracts as shown in the left half of FIG. The volume of the stirring body 2 is changed.

In addition, as shown in FIG. 3, a flexible tank 4 is manufactured so as to change its volume with a shape memory alloy, and the tank shape is obtained by utilizing the temperature difference due to the external temperature according to the depth of the stirring body 2. And the volume of the tank 4 is changed by supplying and discharging the fluid w from the stirring body 2 in accordance with the change in the tank shape. In FIG. 3, the left half shows a state where the tank 4 is contracted, and the right half shows a state where the tank 4 is expanded.
Here, as a method of changing the volume of the tank 4 with the shape memory alloy, for example, an urging piece formed of the shape memory alloy is attached to the inside of the flexible tank 4 such as a bellows type, and the urging piece. It is possible to change the volume of the tank 4 by changing the total length of the tank 4 according to the temperature difference.
When the tank 4 is manufactured so as to change its volume with a shape memory alloy, the tank shape can be changed due to a temperature difference, so that the fluid w automatically changes according to the change in the shape of the tank 4. Therefore, the pump P, the storage battery B, the sensor C, and the controller CT as liquid supply / discharge means can be dispensed with.

Next, the operation of this stirrer will be described.
A predetermined amount of agitation fluid W is supplied into the agitation tank 1 equipped with the underwater agitator A, and the pump P in the agitator 2 is driven. When the fluid w in the tank 4 floating on the water surface is sucked and returned to the agitator 2 connected to the pump by the pipe, the shape of the tank 4 is that of the fluid w flowing out. Depending on the amount, the bulge is reduced.
By returning the fluid w from the external tank 4 to the stirring body in this way, the air a in the stirring body is compressed and changes so that the volume of the stirring body 2 is substantially reduced according to the amount of reduction of the tank 4. To do. The amount of the stirring fluid W that the entire stirring body pushes away by the reduced amount of the tank 4 also decreases, buoyancy decreases from the Archimedes principle, and the stirring body 2 that has floated to the surface of the water begins to sink, When the stirring body 2 settles, the stirring blade 3 receives the resistance of the stirring fluid W and rotates.
In this case, the driving of the pump is set to stop at a set time or when a predetermined amount of fluid w is discharged from the tank 4.

When the stirring body 2 that has settled while rotating has detected that the settling position has reached the bottom of the tank by the sensor C, the fluid is then rotated backward (counterclockwise) by switching the rotational drive direction of the pump P. As w flows out from the stirring body 2 into the tank 4, the air a which has been compressed to some extent in the stirring body 2 expands, and the flexible tank 4 has an amount of fluid w flowing in. It comes to bulge according to. At this time, the substantial volume of the stirrer 2 swells according to the bulging amount of the tank 4 and the buoyancy increases, so that the stirrer 2 floats toward the water surface. Also in this case, the stirring blade 3 is rotated by receiving the resistance of the stirring fluid W, and the rotation direction at this time is counterclockwise opposite to that during settling.
Also in this case, the driving of the pump is set to stop at a set time or when a predetermined amount of fluid w is discharged from the stirring member 2.

  When the stirrer 2 that floats and reaches the water surface position is detected by the sensor C and detects that the rising position has reached the water surface position, the movement of the fluid w occurs again by switching the rotation direction of the pump P. Sedimentation starts when the volume of the stirring member 2 changes. By repeating this operation sequentially, the stirring fluid W in the stirring tank 1 can be stirred with a small electric power.

Also, as shown in FIG. 3, when the tank 4 is manufactured so as to change its volume with a shape memory alloy, the tank shape can be automatically changed by the temperature difference, so that the pump is driven. Instead, the fluid w is naturally supplied and discharged from the tank 4 in accordance with the change in the shape of the tank 4, and the stirrer 2 can automatically repeat the ups and downs.
By repeating this operation, it is possible to uniformly stir the entire tank with high efficiency by switching the rotation direction of the stirrer 2 while the stirrer 2 is rising and descending and stirring the stirring fluid.

  As mentioned above, although the underwater stirrer of this invention was demonstrated based on the Example, this invention is not limited to the structure described in the said Example, The structure is changed suitably in the range which does not deviate from the meaning. It is something that can be done.

  The underwater agitator of the present invention responds to a substantial volume change of the agitator by supplying and discharging the fluid w contained in the agitator with a flexible tank disposed outside the agitator. Because it has the property of rotating and stirring the stirring fluid in the tank while adjusting the buoyancy to float and sink, it can be used for stirring the reaction tank (anaerobic tank or anaerobic tank) in the sewage treatment plant In addition to being suitable for use, it can also be used for, for example, the use of dam lake agitation, chemical reaction tank agitation, tank bottom condition sensing machine (human confirms data sensed at tank bottom) it can.

It is the external appearance perspective view which fractured | ruptured partially which shows one Example of the underwater stirrer of this invention. It is sectional drawing which shows the structure of an underwater stirrer. It is sectional drawing of the Example which has arrange | positioned a different tank. It is a top view of a stirring body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stirring tank 2 Stirring body 3 Stirring blade 4 Flexible external tank 5 Guide rod (guide mechanism)
6 Guide rod support 7 Guide rod support frame P Pump B Storage battery C Sensor CT controller a Air W Stir fluid w Fluid in the stirrer

Claims (6)

  A submerged stirrer that is rotated by the resistance of sludge water in the stirrer during up-and-down movement due to the ups and downs of the stirring blades disposed on the outer periphery, and the volume of the stirrer is increased by the movement of fluid in the stirrer The underwater stirrer is configured to move up and down while floating in and out of the stirring fluid in the tank.   The fluid contained in the stirring member is moved by feeding and discharging into a flexible tank disposed outside the stirring member, so that the volume of the stirring member body is changed. The underwater stirrer according to 1.   3. A structure in which a fluid stored in the stirring body is moved by detecting a lifted and lowered position of the stirring body and driving a pump by a drive energy source provided in the stirring body. The underwater stirrer described.   The underwater agitator according to claim 1, 2 or 3, wherein the raising / lowering position of the agitator is detected by a sensor disposed on the agitator.   5. The underwater agitator according to claim 1, wherein the drive energy source is a storage battery and can be charged and charged in a non-contact manner at an ascending position of the agitator.   A flexible tank installed outside is manufactured to change its volume with a shape memory alloy, and the change in temperature of the stirring body outside the stirring body ascending / descending position is detected and changed to supply and discharge the fluid in the stirring body. The underwater stirrer according to claim 1, wherein the underwater agitator is configured to perform.

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