JP2006088155A - Gas-liquid mixing impeller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas-liquid mixing impeller capable of sucking other gas upon sucking, producing air bubbles including a lot of fine air bubbles and regulating the suction amount of gas. <P>SOLUTION: The gas-liquid mixing impeller is composed of: agitation fins 22 each of which has a face in the rotative direction of a rotary shaft 24, is radially disposed and is rotated in accordance with the rotation of the rotary shaft 24; a gas supply pipe 4 which has one side end opened on the rotation center of the agitation fins 22 and has the other side end opened to a gas vessel for storing suction gas; and a regulator 5 which is disposed between a gas vessel and the agitation fins 22 and is capable of regulating the amount of suction through the gas supply pipe 4. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an agitation apparatus that agitates a liquid and generates bubbles in a liquid tank such as an aquarium for raising organisms or an aeration tank for removing contaminants in polluted water.

Conventionally, as this type of stirring device, there has been a “gas-liquid mixing device” (Japanese Patent No. 1426273, hereinafter referred to as a conventional example).
This conventional example includes: [1] a ventilation pipe having a gas inlet on the upper side and having a plurality of gas ejection holes in the lower side part; and an impeller fixed to the lower side part of the ventilation pipe along the ventilation pipe; A gas-liquid mixing device comprising: a blind plate that closes a lower end opening of the ventilation pipe. As shown in FIG. 12, the lower end of the ventilation pipe 101 that is a hollow cylindrical straight pipe is closed by the blind plate 103, and a plurality of side walls are provided on the side surface of the blind plate 103 that is the lower end of the ventilation pipe 101. A gas ejection hole 101d is formed. Furthermore, a plurality of impellers 102 are fixed to the lower end side surface of the ventilation pipe 101 in the radial direction of the side surface of the ventilation pipe 101. The other end of the ventilation pipe 101 is open to the air and is rotatable by attaching a drive motor for rotating the ventilation pipe 101.

In the gas-liquid mixing apparatus configured as described above, the lower end portion to which the impeller 102 is fixed is inserted into a water tank such as a contaminated water tank or a fish breeding tank, and the drive motor is driven to rotate. Then, the impeller 102 is also rotated with the rotation of the ventilation pipe 101. When the impeller 102 rotates, the liquid around the impeller 102 is agitated. With the stirring, the pressure around the impeller 102 decreases to generate a negative pressure.
In this state, since the peripheral portion of the impeller 102, that is, the plurality of gas ejection holes 101 formed in the ventilation pipe 101 also has negative pressure, the hollow portion of the ventilation pipe 101 from the end of the opened ventilation pipe 101 to the drive motor side. The outside air is sucked through and supplied to the liquid in the water tank.
At this time, the supplied outside air is finely divided by the rotation of the impeller 102 to form fine bubbles, which are dispersed in the liquid in the water tank.
Japanese Patent No. 1426273

  However, according to the conventional example, since the ventilation pipe 101 itself is rotated by the drive motor and intake is performed through the shaft, the upper end portion where the drive motor is attached to the outside air is opened to the air and naturally sucked. However, in order to form a specific gas to be sucked, the suction opening provided in the upper part of the hollow ventilation pipe 101 and a container such as a cylinder containing the specific gas are connected in an airtight state. In this case, there is a problem that it is difficult to ensure an airtight state because the ventilation pipe 101 is rotated by the drive of the drive motor. Similarly, since it is difficult to maintain an airtight state, there is a problem that it is difficult to control and measure the intake air amount by attaching a valve or the like.

  Further, conventionally, since the outside air is sucked and bubbles are generated only by rotating the impeller 102 in the liquid in the water tank, a large number of relatively large bubbles having a diameter of 1 mm or more are generated. However, there was a problem that the generation of fine bubbles having a relatively small diameter of 1 mm or less was small. As a result, there is a problem that it is not suitable for separation of pollutants, impurities, etc. by fine bubbles, such as foam separation that requires a lot of fine bubbles and coagulation levitation separation.

  In view of these problems, it is an object of the present invention to provide a gas-liquid mixing impeller that can inhale other gases during inhalation and that can generate bubbles containing a large amount of fine bubbles.

  Therefore, in this invention,

  A stirring fin that has a surface in the rotation direction of the rotation shaft and is provided in a radial manner, and that rotates with the rotation of the rotation shaft, and one end that opens at the rotation center of the stirring fin, and the other end that holds intake gas An air supply pipe that is open to the container, an adjuster that is provided between the gas container and the stirring fin and can adjust the amount of suction by the air supply pipe, and is fixedly installed concentrically outside the rotation circumference of the stirring fin of the stirring air intake unit. A gas-liquid mixing impeller comprising: a blade-like blade that vertically stands and fixes a plurality of plate-like bodies; and a stirrer that pulverizes the gas sucked along with the rotation of the stirring fin together with the stirring fin. ,

I will provide a. In this gas-liquid mixing impeller, the stirring fin is rotated with a surface in the rotation direction. Therefore, when the stirring fin is installed in the liquid, the liquid is stirred with the rotation. Then, since a negative pressure is generated around the stirring fin as the rotation occurs, the gas in the gas container is supplied to the rotating stirring fin via the air supply pipe having one end opened at the rotation center of the stirring fin. Is done.
The gas supplied to the agitation fin is pulverized by the agitation fin and the stator, and discharged into the liquid as a plurality of bubbles with smaller diameters.
Furthermore, in the present invention,

  It has a cylindrical shape with a lower end opened, a vent hole is drilled in the upper side, and the upper end is connected to the drive unit and is rotated around the center of the cylinder and fixed to the lower end of the cylinder. A stirring fin that is positioned in the liquid and rotates with the rotation of the cylinder, and a blade that is concentrically fixed and installed on the outer periphery of the rotation of the stirring fin, and a plurality of plate-like bodies are vertically installed and fixed. It consists of a stirrer that pulverizes the gas sucked in along with the rotation of the agitation fins together with the agitation fins. Gas-liquid mixing impeller characterized by crushing the outside air

I will provide a. In the gas-liquid mixing impeller, the stirring fin provided at the lower end of the through-cylinder in the liquid is rotated together with the through-cylinder rotated by the drive unit. When the stirring fin is rotated, the stirring fin stirs the liquid. Then, since a negative pressure is generated around the stirring fin as it rotates, the outside air is perforated on the upper end side surface of the vent hole, sucked from the other vent hole, and rotated from the opening at the lower end of the cylinder passage. Supplied.
The gas supplied to the stirring fin is pulverized by the rotating stirring fin and the stator, and discharged into the liquid as a plurality of small-diameter bubbles.

  The stator fixedly installed concentrically on the outer circumference of the stirring fin is composed of a gas-liquid mixing impeller consisting of blade-like stators that stand and fix a plurality of plate-like bodies in a radial manner. Because of the body, the supplied gas is pulverized more finely between the stirring fin and the stator to form small bubbles, and it rotates as a baffle plate for the liquid that tries to rotate as the stirring fin rotates. Can be suppressed.

Furthermore,
A gas-liquid mixing impeller in which the stateer rotates in the opposite direction to the stirring fin,
In this case, since the stator rotates in the direction opposite to the stirring fin, it is possible to change the amount of air sucked while keeping the rotation of the stirring fin constant.

Therefore, according to the present invention, a large amount of bubbles containing a lot of fine bubbles can be generated in the liquid.
In addition, gas can be supplied from the gas container to the rotation center of the stirring fin via the regulator, and the gas can be supplied as bubbles containing fine bubbles in the liquid, so the amount of bubbles to be supplied, that is, the amount of gas is adjusted. It can be made possible and can be monitored, and an appropriate amount of gas as a neutralizing agent can be supplied when neutralizing suspended substances or dissolved substances in the liquid.
In addition, since a stator is provided outside the rotation of the stirring fin, the amount of generated bubbles can be further increased.

Furthermore, since the stator can be formed by a vane-shaped baffle plate or a perforated tube having a plurality of holes, the effect of preventing the liquid from rotating can be greater than that of the perforated tube. Further, in the case of using a perforated cylinder, since the width in the radial direction is not required as much as the blades, there is an effect that the structure can be made compact.
Furthermore, since a plurality of the stateers can be formed on the concentric circles, the amount of generated bubbles can be further increased and the diameter of the generated bubbles can be further reduced.

  Furthermore, by rotating the stator in the direction opposite to the stirring fin, the relative speed between the stator and the stirring fin is increased, so that a large number of bubbles can be generated without increasing the number of individual rotations. In addition to being able to hold down, the relative speed can be further increased even if there is a limit on one rotation speed, and more bubbles can be generated even if a drive unit of the same ability is used.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram of a gas-liquid mixing impeller according to a first embodiment of the present invention, and FIG. 2 shows a state where the gas-liquid mixing impeller according to the first embodiment of the present invention is implemented in a water tank. FIG. 3 is a partial explanatory view of the gas-liquid mixing impeller according to the first embodiment, and FIG. 4 is a partial explanatory view of the gas-liquid mixing impeller according to the first embodiment. The lower figure is an explanatory side view, the upper figure is an explanatory diagram of the central cross section of the lower figure, FIG. 5 is an explanatory diagram of the gas-liquid mixing impeller according to the second embodiment, and FIG. FIG. 7 is an explanatory view of a gas-liquid mixing impeller according to the embodiment, FIG. 7 is a perspective explanatory view showing a perforated tube statuser, FIG. 8 is a cross-sectional explanatory view showing a perforated tube statuser, and FIG. FIG. 10 is an explanatory diagram of a gas-liquid mixing impeller as an embodiment, and FIG. It is an explanatory view illustrating another example of the chromatography, FIG. 11 is an explanatory view of the gas-liquid mixing impeller which is the fifth embodiment.

  Reference numeral 1 denotes a microbubble generator. As shown in FIG. 2, the fine bubble generating device 1 is installed in a water tank A filled with a suspension W containing a suspended solid, and bubbles for separating and removing the suspended solid from the suspension W. Is a device that generates In this embodiment, the removal target to be removed by the microbubble generator 1 is the suspended matter in the liquid, but it may be used to remove contaminants from the aquarium where ornamental fish and farmed fish are raised. It can be carried out in a liquid containing a substance that can be removed by foam separation using fine bubbles.

  The fine bubble generating apparatus 1 includes a gas-liquid mixing impeller 2 capable of generating a fine bubble by sucking gas into the liquid by rotating, a drive unit 21 including a submersible motor, a stator 3, a supply pipe 4, and a regulator 5. And is installed at the bottom of the water tank A. The gas-liquid mixing impeller 2 is formed by a stirring fin 22 including a fin rotation shaft 25, a circular plate 26, and a blade plate 27.

  The drive unit 21 is provided with the rotating shaft 24 protruding upward, and can be rotated by the supplied electric power using the rotating shaft 24 as a vertical axis of rotation.

  The stirring fin 22 is a driven portion that rotates by driving of the driving portion 21 and is fixed to the rotating shaft 24. The stirring fin 22 includes a fin rotation shaft 25, a disk 26, and a blade plate 27. The fin rotation shaft 25 has a hollow tube shape that is fixed by inserting the rotation shaft 24 into the hollow portion. Accordingly, the agitation fin 22 can rotate as the rotation shaft 24 rotates. The disc 26 is composed of two discs facing vertically, and is fixed to the fin rotation shaft 25 with the center of the disc 26 being the same as the rotation center of the fin rotation shaft 25. The vane plate 27 has a plate shape, and is fixed between the discs 26 arranged opposite to each other so as to be in a radial direction with respect to the rotation axis of the fin rotation shaft 25. As shown in FIG. 3, the stirring fin 22 is provided with a plurality of blade plates 27 that are fixed in this manner. By installing the blade plate 27 in this way, one surface is rotated in the rotation direction of the rotation shaft. The radial direction as the installation direction of the blades 27 means that one end of the stirring fin 22 is positioned on the rotation center side and the other end is positioned on the rotation outer side than the one end. As shown in FIG. 4, it means that the extension of the surface of the blade plate 27 to be installed does not necessarily pass through the center of rotation but is installed radially. Therefore, the agitation fin 22 is formed by fixing a plurality of blade plates 27 installed in a radial manner to the fin rotation shaft 25 by sandwiching the blades 26 from above and below. The rotation shaft 24 and the fin rotation shaft 25 are provided with a through hole 28a on the cylindrical side surface above the disc 26 positioned above the blade plate 27 so as to penetrate the rotation shaft 24 and the fin rotation shaft 25. At the same time, a through-hole 28b is formed in the cylindrical side surface so as to pass through the rotary shaft 24 and the fin rotary shaft 25 between the upper and lower disks 26 of the rotary shaft 24 and the fin rotary shaft 25. Accordingly, a passage is formed between the upper and lower disks 26 from the outside of the rotating shaft 24 and the fin rotating shaft 25 via the through hole 28a.

  The stateer 3 includes a baffle plate 31, a lower fixing plate 32, and an upper fixing plate 33. The baffle plate 31 of the stateer 3 is radiated with respect to the axis of the fin rotation shaft 25 in the same manner as the blade plate 27 and on the side opposite to the fin rotation shaft 25 with respect to the blade plate 27, that is, the rotation circle of the stirring fin 22. A plurality of concentric circles are installed on the outer circumference. The plurality of baffle plates 31 are connected and fixed at the bottom of each baffle plate 31 by a lower fixing plate 32 formed of a donut disk, and the lower surface of the lower fixing plate 32 is fixed to the drive unit 21. The driving unit 21 to which the lower fixing plate 32 is fixed is provided with a plurality of water holes 23 from the outside of the driving unit 21 toward the center of the lower fixing plate 32, and the stirring fin 22 lower center from the outside of the driving unit 21. Form a water channel on the side. The upper portions of the plurality of baffle plates 31 are connected and fixed by an upper fixing plate 33 formed of a donut-shaped plate body having a hole formed in the center. The supply pipe 4 is fixed at the center of the upper fixing plate 33. The stateer 3 that pulverizes the gas by the baffle plate 31 is also referred to as a wing plate stater.

  As shown in FIG. 2, the supply pipe 4 has a cylindrical shape as a whole, and the lower end is fixed to the opening in the center of the upper fixing plate 33 of the stator 3 so as to open to the upper disk 26 of the stirring fin 22. Further, the upper end of the supply pipe 4 is opened above the liquid level of the water tank A. In this embodiment, since the gas supplied as bubbles to the suspension W in the water tank A is air, the upper end of the supply pipe 4 is opened in the air that is a gas container. When it is supplied as bubbles in the suspension W of A, it is connected and opened to a gas container made of a cylinder filled with the gas.

  The adjuster 5 is provided in an intermediate portion of the supply pipe 4. The adjuster 5 is capable of adjusting the suction amount of the gas supplied as bubbles into the water tank A via the supply pipe 4. In this embodiment, the adjuster 5 includes a valve capable of manually adjusting the suction amount. When the gas container for the gas to be used is a pressure container such as a pressure cylinder, the pressure of the pressure container is reduced and formed from a device such as a pressure reducing adjustment valve that can be adjusted. In this embodiment, although not shown, the adjuster 5 may be accompanied by a measuring device capable of measuring pressure and flow rate. By attaching the measuring device, gas suction into the water tank A can be performed. Finer adjustment is possible, and it is also possible to change the suction amount with time by providing a timer. In this case, for example, immediately after feeding the breeding feed or during the rest of the breeding fish , You can avoid stress.

The operation of the gas-liquid mixing impeller 2 thus formed will be described below.
Power is supplied and the drive unit 21 is driven. Then, the rotating shaft 24 and the fin rotating shaft 25 rotate. When the rotating shaft 24 and the fin rotating shaft 25 rotate, the entire stirring fin 22 fixed to the fin rotating shaft 25 also rotates, and the blade plate 27 also rotates. When the vane plate 27 rotates, the suspension W in the vicinity of the stirring fins 22 is stirred to generate a negative pressure (this negative pressure rapidly moves in a direction in which the suspension W in the vicinity of the stirring fins 22 moves away from the stirring fins 22). It seems to be caused by the action by stirring). When a negative pressure is generated around the rotation outer side of the stirring fin 22, air is sucked from the end of the supply pipe 4 that opens into the air to the end of the stirring fin 22 via the regulator 5. The sucked air is discharged from the stirring fins 22 toward the stater 3 and stirred, and between the rotating stirring fins 22 and the fixed stateer 3, fine bubbles, that is, the fine bubbles B1 and relatively It is crushed into large bubbles B2 and supplied into the suspension W of the water tank A.

  In this embodiment, the water tank A is filled with the suspension W. For example, in the case of fresh water with a low salinity concentration when it is carried out in a water tank where freshwater fish are raised, fine bubbles B1 are generated. It is difficult and the generated bubble B rises relatively early and bursts. However, according to the gas-liquid mixing impeller 2, the bubble B having the above-described configuration and containing a large amount of fine bubbles B1 can be generated. Therefore, the fine bubbles B1 adheres a pollutant or the like in the liquid, and the fine bubbles B1 remain after the generation. It is easy to collect the pollutant adhered without being destroyed on the upper part of the water tank A. More specifically, it is desirable that the generated fine bubbles B1 contain a large number of bubbles having a diameter of 0.5 mm or less. Even after the rise, it is easy to collect without bursting early. Accordingly, the gas-liquid mixing impeller 2 can remove suspended solids and contaminants as long as it can generate fine bubbles B1 that are bubbles having a diameter of 2 mm or less. By doing so, it functions as a gas-liquid mixing impeller 2.

  However, if the diameter of the bubble B is large, the suspended solids and contaminants that burst and adhere early after rising will return to the liquid again, and the suspended solids and contaminants cannot be efficiently separated from the liquid. Even if it does not rupture, it does not float well in the lateral direction in the liquid and rises immediately due to its buoyancy, so it cannot adhere widely in the liquid. On the other hand, the fine bubble B1 has a remarkably low rising speed compared to the relatively large bubble B2, and diffuses well in a wide range in the lateral direction, so that the attachment in the liquid is performed in a wide range of the water tank. It becomes possible to adhere.

  Further, since the fine bubbles B1 only float well but are difficult to rise, they only diffuse widely in the liquid and do not easily rise upward. However, the gas-liquid mixing impeller 2 has relatively large bubbles B2 together with the fine bubbles B1. Therefore, when a relatively large bubble B2 rises, a water flow from the lower side to the upper side occurs around the fine bubble generating device 1, and when the floating fine bubble B1 comes around the fine bubble generating device 1, It moves upward due to the upward flow or attached to a relatively large bubble B2, and it is possible to efficiently collect suspended substances in the liquid to the upper part of the liquid.

Thus, the fine bubbles B1 generated by the gas-liquid mixing impeller 2 are widely diffused and floated in the liquid, and the suspended substances in the water tank A are attached. Then, the relatively large bubble B2 rises around the fine bubble generating device 1 or adheres to the relatively large bubble B2 and rises together with the relatively large bubble B2.
Although not described in detail, the rising bubble B is discharged as it is, or the bubble B in a state of floating and adhering floating substance is recovered and removed. As a result, the liquid in the water tank A is purified. In this embodiment, the bubbles B rising to the upper part of the fine bubble generating device 1 are sucked up together with the liquid in the water tank A, filtered by a filter provided at the upper part of the water tank, and filtered again to purify only the liquid in the water tank A. Purify by returning to

  In the first embodiment, the stator 3 having the baffle plate 31 is provided outside the stirring fin 22 in order to increase the amount of the fine bubbles B1, but the second embodiment shown in FIG. As in the embodiment, it may be configured without providing the statuser 3, and can be selectively used depending on the usage such as the generation amount of the fine bubbles B <b> 1.

Next, a third embodiment will be described.
As shown in FIG. 6, the gas-liquid mixing impeller 2 according to the third embodiment has a drive unit 21 at the top. And the drive part 21 is installed in the upper part of the water tank A. As shown in FIG. The rotating shaft 24 of the drive unit 21 is protruded and rotated in the direction of the water tank A, that is, downward.
The gas-liquid mixing impeller 2 is installed such that the lower part is located in the liquid in the water tank A, and includes a through cylinder 6, a stirring fin 22, and a stator 3.

  The cylinder 6 has a hollow pipe shape, the hollow portion forms a ventilation passage 61, the upper portion is fixed to the rotating shaft 24, and the outside air is sucked into the cylindrical side surface located above the liquid W in the water tank A. Possible intake holes 62 are formed. Further, a supply hole 63 is opened at the lower end of the through-cylinder 6, and the agitation fin 22 is fixed. The agitation fin 22 is also installed so as to be rotatable with the rotation of the through-cylinder 6.

  As in the first embodiment, the stirring fin 22 includes a fin rotation shaft 25, a circular plate 26, and a blade plate 27. The upper disk 26a is fixed to the lower part of the cylinder 6 so that the center coincides, the lower disk 26b is provided to face the upper disk 26a, and the vane plate 27 is provided between the opposed disks 26. As in the first embodiment, the circular plates 26 and the blade plates 27 are integrally formed by being fixed radially from the rotation center. Of course, the vane plate 27 may be installed as shown in FIG. 4 as described in the first embodiment.

The stateer 3 is formed outside the stirring fin 22 as in the first embodiment, but in the third embodiment, the fixed cylinder 34 is placed on the upper fixing plate 33 in order to be positioned outside the stirring fin 22. The upper end of the fixed cylinder 34 is fixed to the upper surface of the water tank A or the non-rotating portion of the drive unit 21, and the lower fixing plate 32 is fixed to the upper fixing plate by the baffle plate 31. The other components are the same as those of the first embodiment.
In addition, the stirring fins 22 in the third embodiment, or the stirring fins 22 and the stators 7 are arranged in a plurality of skewers in the vertical direction, and bubbles are formed by the plurality of stirring fins 22 or the stirring fins 22 and the stators 3. B can also be formed, and in this case, more bubbles can be generated by one drive unit 21.

The operation of the third embodiment will be described below.
In the third embodiment, when the rotating shaft 24 of the drive unit 21 rotates, the through cylinder 6 whose upper portion is fixed to the rotating shaft 24 also rotates. Then, the stirring fin 22 fixed to the lower part of the through cylinder 6 also rotates. As the rotation proceeds, as in the first embodiment, negative pressure is generated around the rotation outer side of the stirring fin 22, and the outside air is sucked from the intake hole 62 formed in the upper part of the through cylinder 6 and passes through the ventilation path 61. Thus, the liquid is supplied from the supply hole 63 to the stirring fin 22.

When the outside air is sucked by the stirring fins 22, as described in the first embodiment, bubbles B containing a large amount of fine bubbles B1 are generated by the stirring fins 22 and the stateer 3, and the suspended substances in the liquid W are attached. Then, the suspended substance in the liquid W is removed and the liquid W is purified by another collecting means provided.
In the first to third embodiments, the stateer 3 pulverizes the gas with the baffle plate 31 to generate the bubbles B, and the liquid W that also rotates as the stirring fins 22 rotate. Although it is formed by the blade plate-like stateer 3 for preventing the accompanying rotation, a perforated tube stateer described below based on FIG. 7 may be used.

  That is, 7 is a perforated tube statuser. Unlike the wing plate-like stator 3, the perforated tube stator 7 includes a perforated tube 71 in which a plate-like body such as a punching metal having a plurality of small holes is formed in a cylindrical shape, and an upper fixing plate 73 and a lower fixing plate 72. As shown in FIG. 8, the agitation fins 22 are provided so as to be located inside.

  As described above, the stateer may be formed by providing the perforated cylinder 71 in place of the baffle plate 31 so as to pulverize the gas to generate the bubbles B and prevent the accompanying rotation. The perforated tube stator 7 shown in FIGS. 7 and 8 has been described for use in the third embodiment, but when used in the first embodiment, an upper fixing plate and a lower fixing plate are appropriately used. Processed and used.

Next, a description will be given of a fourth embodiment in which a plurality of statusers are provided on a concentric circle.
The gas-liquid mixing impeller 2 shown in FIG. 9 is a type in which outside air is sucked from the top through the cylinder 6 as in the third embodiment. The difference from the third embodiment is that the stirring fins 22 and the stator Since the rotation operation and the suction of the outside air are the same as in the third embodiment, the stirring fin 22 and the stator 3 will be described.

  In the stirring fin 22 in the fourth embodiment, as shown in FIG. 9, the upper disk 26a and the blades 27 are the same as in the third embodiment, and the lower disk 26b is larger than the upper disk 26a. Protruding from the top. Further, on the lower circular plate 26b, on the outer side of the blade plate 27, that is, on the outer side of the upper fixing plate 73, the perforated cylinder fins 29 formed in the same shape as the perforated cylinder 71 are disposed on the concentric circles at appropriate intervals. . Therefore, in the rotation of the stirring fin 22, both the blade plate 27 installed closest to the center of rotation and the perforated tube fins 29 fixed to the lower disk 26b and doubled on the outer circumference of the rotation circle are provided. Rotate.

As shown in FIG. 9, the stationary cylinder 34 is installed in the stateer 3 in the same manner as in the third embodiment. However, unlike the third embodiment, the perforated cylinder 71 described in FIGS. It is concentric with the upper fixing plate 73, is fixed so as to be positioned between the blade plate 27 provided on the stirring fin 22 and the perforated tube fin 29, and is also positioned on the outer circumferential side of the stirring fin 22. The perforated tube 71 is fixed.
The operation of the gas-liquid mixing impeller 2 formed in this way is similar to the third embodiment in that a negative pressure is generated by the rotation of the stirring fin 22 and the outside air passes through the ventilation path 61 of the cylinder 6. The air is sucked by the stirring fins 22 and moved to the outside along with the rotation, and is crushed by the stirring fins 22 and the stator 3 to become bubbles B including fine bubbles B1 and supplied to the outside of the gas-liquid mixing impeller 2. .

  In this way, the stirring fin 22 is formed from the blade plate 27 and the plurality of perforated cylinder fins 29, and the stator 3 is formed from the plurality of perforated cylinders 71. Since the perforated cylinders 71 provided in the stator 3 are alternately arranged, when the stirring fins 22 are rotated, the sucked gas is crushed at the positions of the stirring fins 22 and the stator 3 where they overlap each other and is radially emitted. As it is discharged, more fine bubbles B1 can be generated, and the diameter of the fine bubbles B1 can be further reduced. In this embodiment, since the lower disk 26b of the stirring fin 22 performs the lower fixing plate function of the stateer 3 that prevents the gas from escaping downward, it is formed without providing the lower fixing plate. A lower fixing plate may be provided at the lower part of the perforated tube 71 located on the outermost side of the stateer 3 so as not to be exposed in the water tank A.

The fourth embodiment is an embodiment in which a plurality of the stirring fins 22 and the stateers 3 are formed so as to overlap each other on a concentric circle. The fourth embodiment has been described based on the third embodiment. The first embodiment can be easily implemented by fixing the blade plate 27 and the perforated cylinder fin 29 to 26a and fixing the perforated cylinder 71 of the stator 3 to the lower fixing plate.
In the fourth embodiment, all of the stators 3 are provided with the perforated cylinders 71, and the stirring fins 22 are all provided with the perforated cylinder fins 29 outside the vane plate 27. As shown in FIG. 6, the stator 3 may be provided with a perforated cylinder 71 and the stirring fins 22 may all be provided with a blade plate 27. Further, although not shown, the baffle plates 31 and the perforated cylinders 71 are alternately installed on the stator 3 from the inside of the rotation, and the blades 27 and the perforated cylinder fins 29 are alternately installed on the stirring fin 22 from the inside. For example, the baffle plate 31 and the perforated tube 71 can be installed in the stateer 3 in order as appropriate. Similarly, if the innermost blade plate 27 is also installed in the stirring fin 22, the outer blade plate 27 and the perforated tube are disposed on the outer side. The fins 29 can be installed in order as appropriate. Further, the number of the plurality of concentric circles installed is not particularly limited, and may be configured in any way as long as it is appropriately designed according to the amount of bubbles B to be generated.

Next, a fifth embodiment will be described.
As shown in FIG. 11, the gas-liquid mixing impeller 2 according to the fifth embodiment forms a fixed cylinder 34 provided on the stator 3 so as to be rotatable in a direction opposite to the stirring fins 22.

  That is, in the fifth embodiment, as shown in FIG. 11, the through cylinder 6 is provided so as to protrude further upward from the upper part of the water tank A, and the drive unit 21 is further upward from the upper part of the water tank A. The rotary shaft 24 is positioned so as to protrude downward, and the upper portion of the through cylinder 6 is fixed to the rotary shaft 24 so that the through cylinder 6 can be rotated.

  Reference numeral 8 denotes a stator motor. The stator motor 8 is installed in the upper part of the water tank A. Reference numeral 9 denotes a fixed cylinder rotating shaft. The fixed cylinder rotating shaft 9 is formed in a hollow shaft shape, and the through cylinder 6 is inserted into the hollow portion, and the fixed cylinder 34 located outside the through cylinder 6 is fixed. The rotation of the stator motor 8 is transmitted to the fixed cylinder rotating shaft 9 so as to be rotatable in the direction opposite to the rotating shaft with the same rotation center as that of the rotating shaft 24.

Therefore, the fixed cylinder 34 can rotate in the direction opposite to the through cylinder 6.
Although transmission of driving force from the stator motor 8 to the rotating shaft 9 is not described in detail, it may be formed so that the rotational driving force of the stator motor 8 is transmitted by a combination of gears, and transmission by a belt. For example, any method may be used as long as it is used as appropriate. As described above, by allowing each of the shafts to be rotated by the two driving units, the number of rotations of the driving unit can be independently controlled, and the amount of generated bubbles can be adjusted in detail. Although not described with reference to the drawings, the driving force of the driving unit 21 may be formed on the rotating shaft 9 so as to be rotatable in the opposite direction to the through-cylinder 6 by a gear or the like. In this case, since the two shafts can be rotated by one drive unit, the configuration of the power transmission means such as gears is complicated as compared with the one using two motors as described above, but the product cost can be reduced. it can.

As described above, in the fifth embodiment, the stirring fins 22 and the statuser 3 are provided in the same manner as in the third embodiment.
In the fifth embodiment formed as described above, when the through cylinder 6 is rotated by the drive unit 21, the outside air is sucked into the stirring fins 22 as in the third embodiment. At this time, in the stator 3, the fixed cylinder 34 fixed to the fixed cylinder rotating shaft 9 is rotated in the opposite direction to the through cylinder 6 by the rotational driving force of the stator motor 8.

  Then, since the stirring fins 22 and the stator 3 are rotating in opposite directions, the relative speeds of the driving unit 21 and the stator motor 8 with respect to the rotational speeds of the driving unit 21 and the stator motor 8 are respectively. High speed is generated, and the generated negative pressure becomes larger than that when only the driving unit 21 rotates at the same speed, and more bubbles B are generated.

  The gas-liquid mixing impeller 2 shown in the fifth embodiment is effective, for example, when the rotation of the drive unit 21 cannot be made very high, and the stateer 3 is reversed even if the rotation of the drive unit 21 is low. By rotating, more bubbles B can be generated. In the fifth embodiment, the stirring fins 22 and the stator 7 as shown in FIGS. 7 to 10 may also be implemented, which can further promote the generation of bubbles B.

Explanatory drawing of the impeller for gas-liquid mixing which is 1st Embodiment Explanatory drawing showing the state which implemented the impeller for gas-liquid mixing which is 1st Embodiment in the water tank Partial explanatory drawing of the impeller for gas-liquid mixing which is 1st Embodiment Partial explanatory drawing of the impeller for gas-liquid mixing which is 1st Embodiment Explanatory drawing of the impeller for gas-liquid mixing which is 2nd Embodiment Explanatory drawing of the impeller for gas-liquid mixing which is 3rd Embodiment Perspective explanatory view showing a perforated tube statuser Cross-sectional explanatory drawing showing a perforated tube statuser Explanatory drawing of the impeller for gas-liquid mixing which is 4th Embodiment Explanatory drawing showing other examples of stirring fin and statuser Explanatory drawing of the impeller for gas-liquid mixing which is 5th Embodiment Explanatory drawing showing a conventional example

Explanation of symbols

A Water tank W Liquid B Bubble B1 Fine bubble B2 Relatively large bubble 1 Fine bubble generator 2 Gas-liquid mixing impeller 21 Drive unit 22 Stirring fin 23 Water passage hole 24 Rotating shaft 25 Fin rotating shaft 26 Disk 26a Upper disk 26b Lower disk 27 Blade plate 28a, 28b Through hole 29 Perforated cylinder fin 3 Stator 31 Baffle plate 32 Lower fixed plate 33 Upper fixed plate 34 Fixed cylinder 4 Supply pipe 5 Adjuster 6 Through cylinder 61 Ventilation path 62 Intake hole 63 Supply hole 7 Perforated cylinder statuser 71 Perforated cylinder 72 Lower fixed plate 73 Upper fixed plate 8 Stator motor 9 Fixed cylinder rotation shaft

Claims (4)

A stirring fin that is radially provided with a surface in the direction of rotation of the rotating shaft, and that rotates as the rotating shaft rotates;
An air supply pipe opened at one end at the rotation center of the stirring fin and the other end opened at a gas container containing the intake gas;
An adjuster which is provided between the gas container and the stirring fin and can adjust the amount of suction by the air supply pipe;
Concentric fixedly installed outside the rotation circumference of the stirring fin of the stirring intake portion, and has a blade shape that vertically fixes and fixes a plurality of plate-like bodies, and the gas sucked in as the stirring fin rotates is mixed with the stirring fin. A stateer crushing with,
A gas-liquid mixing impeller characterized by comprising: A cylinder that has a cylindrical shape, has a lower end opened, a vent hole is formed in a side surface on the upper end side, and an upper end is connected to the drive unit and rotated around the center of the cylinder,
A stirring fin that is fixed to the lower end of the through-cylinder and is located in the liquid and rotates with the rotation of the through-cylinder;
A stator that is concentrically fixedly installed on the outer periphery of the rotation of the stirring fins, has a blade shape that vertically fixes a plurality of plate-like bodies, and crushes the gas sucked in along with the stirring fins together with the stirring fins And consist of
A gas-liquid mixing impeller characterized in that the agitation fin rotates in the liquid to suck outside air from the vent hole of the through-cylinder, and the outside air sucked by the agitation fin and the stator is pulverized.   The stator that is fixedly installed concentrically on the outer periphery of the stirring fin is provided with a plurality of blade-like stators that stand and fix a plurality of plate-like bodies in a radial manner so as to be concentric with the rotation circle of the stirring fin. The impeller for gas-liquid mixing in any one of Claim 1 and Claim 2.   The gas-liquid mixing impeller according to any one of claims 1 to 3, wherein the stateer rotates in a direction opposite to the stirring fin.

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