JP2019155210A - Aerator - Google Patents

Abstract

To provide an aerator that can perform aeration by efficiently mixing air with liquid while simplifying a device.SOLUTION: An aerator 100 includes: a submerged pump 1 including a pump chamber 3 provided with an impeller 5; an air intake pipe 6 for leading air to the pump chamber 3; and a float 8 arranged so as to surround the air intake pipe 6. The submerged pump 1 and the air intake pipe 6 are arranged linearly along a direction in which the air intake pipe 6 extends.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an aerator, and more particularly to an aerator including a submersible pump.

  Conventionally, an aerator including a submersible pump is known (for example, see Patent Document 1).

  Patent Document 1 discloses a water purification device (aerator) that includes a submersible pump, an intake pipe connected to a discharge section of the submersible pump, and a float that supports the submersible pump by floating through the intake pipe. ing. In this Patent Document 1, the intake pipe and the submersible pump are arranged offset (shifted) in plan view.

JP 2004-033943 A

  However, in the above-mentioned Patent Document 1, since the intake pipe is connected to the discharge portion, the discharged water is merely hit against the air sucked from the intake pipe, and the air and water are effectively mixed. There is an inconvenience that it is difficult to perform aeration in such a state. Further, in Patent Document 1, since the intake pipe and the submersible pump are offset (shifted) in plan view, the center of gravity of the member (submersible pump) arranged in the water is the submersible pump. It is not placed under the supporting intake pipe. For this reason, in order to maintain the floating posture while supporting the submersible pump, it is considered that the entire facility becomes large, such as increasing the connection strength between the float and the intake pipe or increasing the floating ability of the float. As a result, there is a problem that it is difficult to perform aeration by effectively mixing air and liquid while simplifying the apparatus.

  The present invention has been made to solve the above-described problems, and one object of the present invention is to perform aeration by effectively mixing air and liquid while simplifying the apparatus. It is to provide a possible aerator.

  To achieve the above object, an aerator according to one aspect of the present invention is disposed so as to surround a submersible pump including a pump chamber provided with an impeller, an intake pipe that guides air to the pump chamber, and the intake pipe. The submersible pump and the intake pipe are arranged in a straight line along the direction in which the intake pipe extends.

  In the aerator according to one aspect of the present invention, the air and the liquid guided to the pump chamber can be effectively stirred and mixed by the impeller in the pump chamber. And aeration can be effectively mixed to perform aeration. Further, since the submersible pump and the intake pipe can be arranged linearly, the center of gravity of the aerator can be arranged directly below the intake pipe. Thereby, since the submersible pump can be easily supported by the float via the intake pipe, the submersible pump can be easily floated and supported with a simple configuration. As a result, aeration can be performed by effectively mixing air and liquid while simplifying the apparatus. Further, since the aerator can be installed on the water surface basis by the float, the aerator can be easily installed even in an environment where the bottom surface is unstable such as a tank or a pond in which liquid is stored. The pump chamber is a space for sucking fluid (liquid and gas) and discharging the fluid by driving the impeller.

  In the aerator according to the above aspect, preferably, the pump chamber further includes a water suction portion that guides the liquid, and the intake pipe and the water suction portion are arranged so that the air and the liquid merge in the vicinity of the suction port of the pump chamber. ing. If comprised in this way, air and a liquid can be mixed effectively in the suction inlet vicinity of a pump chamber. Further, since the liquid and air can be merged at the suction port of the pump chamber where the flow rate of the liquid is increased, the negative pressure is effectively generated in the intake pipe by the speed at which the liquid flows from the water absorption portion into the pump chamber. be able to. Thereby, air can be efficiently inhaled from the intake pipe. Note that the vicinity of the suction port of the pump chamber refers to the vicinity of the suction port of the pump chamber including the suction port portion itself of the pump chamber.

  In this case, preferably, the intake pipe and the water absorption section are arranged so that the intake direction to the pump chamber and the water absorption direction are substantially the same. If comprised in this way, since air and a liquid can be smoothly flowed in in a pump chamber, a pressure loss can be suppressed.

  In the configuration in which the intake direction and the water absorption direction to the pump chamber are substantially the same direction, preferably, the intake pipe and the water absorption unit are configured so that the intake direction and the water absorption direction to the pump chamber are substantially the same as the rotation axis direction of the impeller. It is arranged to be. With this configuration, air and liquid can flow into the pump chamber along the rotational axis direction, so that air and liquid can flow into the pump chamber more efficiently using the negative pressure generated by the rotation of the impeller. In addition, air and liquid can be efficiently agitated in the pump chamber by utilizing the centrifugal force generated by the rotation of the impeller.

  In the configuration in which the intake direction and the water absorption direction to the pump chamber are substantially the same, the water absorption portion is preferably configured to guide the liquid to the pump chamber along the outside of the intake pipe. If comprised in this way, since it is not necessary to arrange | position a water absorption part so that it may cross | intersect inside the intake pipe which continues from the upper surface of a water surface to a pump chamber, it can suppress that the structure of a water absorption part becomes complicated.

  In this case, preferably, the water absorption part and the intake pipe are formed to have a double pipe structure. If comprised in this way, a liquid (water) will be introduce | transduced from between the outer tube | pipe and the inner tube | pipe of a double pipe structure, and also an intake pipe (inside Therefore, the pressure generation phenomenon by the gas-liquid mixed fluid can be obtained with a simple configuration without obstructing the basic principle of the centrifugal pump that gives energy to the fluid by the rotation of the impeller.

  In the configuration including the water absorption portion, the liquid suction port of the water absorption portion is preferably arranged in the vicinity of the suction port of the pump chamber and configured to suck liquid from the side with respect to the intake pipe. If comprised in this way, it can suppress that the distance of the flow-path part which guides the liquid of a water absorption part becomes large compared with the case where the liquid suction port of a water absorption part is arrange | positioned in the position away from the pump chamber. Therefore, the enlargement of the entire aerator device can be suppressed.

  In the configuration including the water absorption part, preferably, at least one of the intake pipe and the water absorption part is provided with a valve whose opening degree can be adjusted. If comprised in this way, according to the depth which installs an aerator, the flow volume of air or the flow volume of a liquid can be adjusted, Therefore Air and a liquid can be inhaled and discharged with good balance irrespective of the depth. That is, even when the installation water depth of the aerator 200 is changed, the supply air volume and the convection strength can be adjusted according to the application and environmental change by adjusting the opening degree of the valves 64 and 74.

  In the aerator according to the above aspect, preferably, the intake pipe is provided with a plurality of holes having a diameter smaller than the pipe diameter at the end on the pump chamber side, and gas is supplied to the pump chamber from the plurality of holes. It is configured. If comprised in this way, since the diameter of the bubble supplied from an intake pipe can be made small, the contact area of the liquid with respect to the air per unit volume can be enlarged. Thereby, air can be efficiently dissolved in the liquid.

  In the aerator according to the above aspect, the submersible pump preferably includes a motor that rotates the impeller, and the motor, the pump chamber, and the intake pipe are arranged in this order along the direction in which the intake pipe extends. If comprised in this way, since air can be guide | induced directly from an intake pipe to a pump chamber, intake efficiency can be improved effectively.

  In the aerator according to the above aspect, the intake pipe is preferably formed in a straight line so as to extend in a direction substantially the same as the rotation axis direction of the impeller. If comprised in this way, while simplifying the structure of an intake pipe, the center of gravity of the whole apparatus of an aerator is not greatly destroyed by supporting a submersible pump with a float via an intake pipe.

  In the aerator according to the aforementioned aspect, the impeller is preferably configured such that the rotation axis is disposed inside the outer periphery of the intake pipe in plan view. If comprised in this way, since the rotating shaft line of an impeller can be arrange | positioned in the centerline vicinity of an intake pipe, a submersible pump can be supported by a float via an intake pipe more stably.

  In the aerator according to the above aspect, the submersible pump is preferably configured such that the center of gravity is disposed inside the outer periphery of the float in plan view. If constituted in this way, the center of gravity of the submersible pump can be arranged directly under the float, so that the submersible pump can be maintained and supported only by supporting the submersible pump so that it is suspended from the float. Can do.

  The aerator according to the above aspect preferably further includes a discharge unit that is connected to the pump chamber and discharges air and liquid, and a plurality of discharge units are provided at substantially equal intervals around the pump chamber. If comprised in this way, since the reaction force of the discharge from a discharge part can be counterbalanced by the discharge from a some discharge part, the attitude | position of a submersible pump can be maintained easily.

  In the aerator according to the aforementioned aspect, the intake pipe is preferably disposed so as to penetrate the float. If comprised in this way, the buoyancy of a float can be stably conveyed to an intake pipe.

  The aerator according to the above aspect preferably further includes a position adjusting unit that adjusts the vertical position of the float with respect to the intake pipe. If comprised in this way, the installation depth of an aerator can be adjusted easily.

  In this case, preferably, the position adjusting portion is formed in a bowl shape, and the lower surface is in contact with the upper surface of the float, and the fixed position in the vertical direction with respect to the intake pipe is adjustable. If comprised in this way, since it is not necessary to couple | bond a float and a position adjustment part directly, it is not necessary to make a hole in a float which has a foaming material or a hollow structure, or to tighten.

  According to the present invention, as described above, aeration can be performed by effectively mixing air and liquid while simplifying the apparatus.

It is the schematic which showed the aerator by 1st Embodiment of this invention. It is sectional drawing along the II-II line of FIG. It is sectional drawing along the III-III line of FIG. It is the figure which showed the diffuser nozzle of the aerator by 1st Embodiment of this invention. It is the schematic which showed the aerator by 2nd Embodiment of this invention. It is the schematic which showed the aerator by 3rd Embodiment of this invention.

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

[First Embodiment]
(Configuration of aerator)
A first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the aerator 100 according to the first embodiment includes a submersible pump 1, an intake pipe 6, a water absorption part 7, a float 8, and a position adjustment part 9. The submersible pump 1 includes a motor 10, a rotating shaft 2, a pump chamber 3, an oil chamber 4, and an impeller 5. The submersible pump 1 is a vertical submersible electric pump in which the rotating shaft 2 extends in the up-down direction.

  The motor 10 is sealed so that water from the outside does not enter. Further, the motor 10 is configured to rotationally drive the impeller 5 via the rotary shaft 2. The motor 10 includes a stator 11 and a rotor 12. The stator 11 has a coil and is disposed on the outer periphery of the motor 10. The stator 11 is configured to generate a magnetic field when electric power is supplied from the cable 13. The rotor 12 is attached to the rotating shaft 2 and is disposed inside the motor 10 so as to face the stator 11. The rotor 12 is configured to rotate by a magnetic field from the stator 11.

  The rotating shaft 2 is configured to rotate by driving the motor 10. The rotating shaft 2 is configured to transmit the driving force of the motor 10 to the impeller 5. The rotating shaft 2 (impeller 5) is configured to rotate clockwise when viewed from below. The rotating shaft 2 is rotatably supported by bearings 21 and 22. The rotating shaft 2 is disposed so as to extend from the motor 10 through the oil chamber 4 to the pump chamber 3. An impeller 5 is attached to the end of the rotating shaft 2 opposite to the end on the motor 10 side.

  An impeller 5 is provided in the pump chamber 3. The pump chamber 3 includes a pump casing 31, a suction port 32, a discharge part 33, and a flow path 34 (see FIG. 2). The pump chamber 3 is a space for sucking fluid (liquid and gas) and discharging the fluid by applying pressure by driving the impeller 5. The impeller 5 is configured to rotate to suck the liquid (water) in the region where the submersible pump 1 is disposed from the suction port 32 and to send the sucked liquid to the discharge unit 33 via the flow path 34. Has been. Further, air is sucked together with the liquid from the suction port 32, and the sucked air is configured to be sent to the discharge unit 33 via the flow path 34. Further, liquid and air are discharged from the discharge portion 33. The pump casing 31 is formed so as to cover the pump chamber 3. The pump casing 31 is formed of a rubber material, a resin material, a metal material, or the like.

  As shown in FIG. 2, the discharge unit 33 is connected to the pump chamber 3 and configured to discharge air and liquid. A plurality of discharge portions 33 are provided at substantially equal intervals around the pump chamber 3. Specifically, four discharge units 33 are provided around the pump chamber 3 at intervals of approximately 90 degrees in plan view. The discharge unit 33 is configured to discharge fluid (liquid and air) in a substantially horizontal direction. In other words, the discharge unit 33 is configured to discharge the fluid toward the outside in the direction orthogonal to the rotation axis 2. The flow path 34 is formed to be curved. The flow path 34 is provided to guide the fluid to the discharge unit 33. In FIG. 2, illustration of the impeller 5 is omitted, and the pipe portion 61 of the intake pipe 6 positioned above is indicated by a broken line.

  The oil chamber 4 is disposed between the motor 10 and the pump chamber 3, and the oil chamber 4 is filled with oil. A mechanical seal 41 is provided in the oil chamber 4. The mechanical seal 41 has sliding portions (not shown) on the load side (pump chamber 3 side) and the anti-load side (opposite side to the pump chamber 3, that is, on the motor 10 side). . The sliding portion on the load side has a function of preventing (suppressing) the pressure water in the pump chamber 3 from flowing into the oil chamber 4. Further, the sliding portion on the non-load side has a function of preventing (suppressing) the fluid containing the oil in the oil chamber 4 from flowing into the motor 10 side. The sliding portion is lubricated by the oil filled in the oil chamber 4 and cooled so as not to be burned.

  As shown in FIG. 1, the impeller 5 is connected to the motor 10 via the rotating shaft 2. The impeller 5 is disposed in the pump chamber 3. The impeller 5 is formed in a circular shape when viewed from the axial direction (vertical direction). Further, the center of the impeller 5 (and the rotating shaft 2) is disposed directly below the suction port 32 and is disposed on the side of the discharge unit 33. The impeller 5 is made of a metal material, a resin material, a rubber material, or the like. The impeller 5 is a centrifugal impeller. That is, the impeller 5 is configured to suck fluid from the vicinity of the center and send fluid to the outside in the radial direction.

  The intake pipe 6 is configured to guide air to the pump chamber 3. The intake pipe 6 includes a pipe part 61, an air diffusion nozzle 62, and a filter 63. The intake pipe 6 is disposed so as to extend in the vertical direction. That is, it arrange | positions so that the suction inlet of the intake pipe 6 may come out above a water surface. The pipe part 61 is formed of a resin pipe. The tube part 61 has a length of about several tens of centimeters to several meters, for example. The intake pipe 6 is formed in a straight line so as to extend in substantially the same direction as the direction of the rotation axis A of the impeller 5. Further, the intake pipe 6 (pipe section 61) is disposed so as to penetrate the float 8.

  A diffuser nozzle 62 is provided below the pipe portion 61. The diffuser nozzle 62 is connected to the pipe part 61 through a seal 621. As shown in FIG. 4, the diffuser nozzle 62 is provided with a plurality of holes 622 having a diameter smaller than the pipe diameter at the end on the pump chamber 3 side. The intake pipe 6 is configured to supply gas from the plurality of holes 622 to the pump chamber 3. The hole 622 has a diameter of about several mm. The hole 622 has a circular shape. A plurality of holes 622 are arranged at the tip of the air diffusion nozzle 62 at a predetermined interval. Specifically, a plurality of holes 622 are arranged at equal intervals at the hemispherical tip of the air diffusion nozzle 62.

  As shown in FIG. 1, a filter 63 is provided above the pipe portion 61. The filter 63 is provided in the vicinity of the suction port of the pipe part 61. The filter 63 is provided so that foreign matter does not enter the intake pipe 6. That is, the filter 63 is formed so that air can pass therethrough but foreign matter such as dust cannot pass through.

  The water absorption part 7 is configured to guide the liquid to the pump chamber 3. The water absorption part 7 includes a water absorption pipe 71, a strainer 72, and an orifice 73. The water absorption part 7 is configured to guide the liquid to the pump chamber 3 along the outside of the intake pipe 6. Further, the liquid suction port (strainer 72) of the water absorption unit 7 is arranged in the vicinity of the suction port 32 of the pump chamber 3 and is configured to suck the liquid from the side with respect to the intake pipe 6. The water absorption pipe 71 is disposed so as to surround the air diffusion nozzle 62 of the intake pipe 6. That is, the water absorption part 7 and the intake pipe 6 are formed so as to have a double pipe structure. The water suction pipe 71 is connected to the suction port 32 of the submersible pump 1.

  The strainer 72 is connected to the water absorption pipe 71. The strainer 72 functions as a filter that prevents foreign matters such as dust from being sucked in, and also functions as a suction port for sucking in liquid. The strainer 72 is configured to suck water in the horizontal direction. The orifice 73 is provided between the strainer 72 and the water absorption pipe 71. The orifice 73 has an annular shape and is configured to locally narrow the flow path. The orifice 73 is provided so that the liquid flow rate is within a predetermined range based on the standard depth position where the submersible pump 1 is installed. That is, when the submersible pump 1 is disposed at the standard depth position, the orifice 73 adjusts the amount of liquid sucked to a predetermined amount so that the flow rate of the liquid is equal to or higher than the predetermined speed, and the air is supplied from the intake pipe 6 to the air. Make it easy to inhale.

  The float 8 is provided to float and support the aerator 100. Specifically, the float 8 is disposed so as to surround the intake pipe 6. In addition, the float 8 supports the intake pipe 6 via a position adjustment unit 9. The intake pipe 6 is connected to the submersible pump 1 via the water absorption part 7. That is, the submersible pump 1 is supported by the float 8 so as to float in water. The float 8 is formed of a foam material or a hollow member. Moreover, the float 8 has a through-hole penetrating in the vertical direction. The through hole is provided near the center of the float 8 in plan view. A pipe portion 61 of the intake pipe 6 is inserted into the through hole of the float 8.

  The position adjustment unit 9 is configured to adjust the position of the float 8 in the vertical direction (Z direction) with respect to the intake pipe 6. Specifically, the position adjustment unit 9 is formed in a bowl shape, and is configured such that the lower surface (the surface on the Z2 direction side) of the flange contacts the upper surface of the float 8. Further, the position adjusting unit 9 is configured to be able to adjust the fixed position in the vertical direction with respect to the intake pipe 6. Thereby, since the length of the intake pipe 6 located under the float 8 can be adjusted, the depth position of the aerator 100 (submersible pump 1) can be adjusted. As shown in FIG. 3, the position adjustment unit 9 includes a pair of clamp members 91, a fastening member 92, and a mooring member 93.

  The pair of clamp members 91 are fixed to the intake pipe 6 (pipe part 61) by sandwiching the intake pipe 6 (pipe part 61). Specifically, the clamp member 91 is fixed to the pipe part 61 by fastening with the fastening member 92 in a state where the pair of clamp members 91 are opposed to each other with the pipe part 61 interposed therebetween. The fastening member 92 fastens the pair of clamp members 91 at a plurality of positions. The fastening member 92 includes, for example, a bolt and a nut. A mooring rope 931 is fastened to the mooring member 93. Thereby, it can suppress that the aerator 100 is poured. In addition, the clamp member 91 is configured to be caught by the convex portion of the portion where the filter 63 of the intake pipe 6 is provided even when the fastening is loosened.

  Here, in the first embodiment, as shown in FIG. 1, the submersible pump 1 and the intake pipe 6 are arranged linearly along the direction in which the intake pipe 6 extends. Specifically, the motor 10, the pump chamber 3, and the intake pipe 6 are arranged in this order along the direction in which the intake pipe 6 extends. That is, each part of the aerator 100 is arranged along the vertical direction (Z direction).

  In the first embodiment, the intake pipe 6 and the water absorption part 7 are arranged in the vicinity of the suction port 32 of the pump chamber 3 so that air and liquid merge. Specifically, the tip of the air diffusion nozzle 62 of the intake pipe 6 is provided above the suction port 32 of the pump chamber 3. Thereby, the air supplied from the intake pipe 6 and the liquid supplied from the water absorption part 7 are configured to merge in the vicinity of the suction port 32 of the pump chamber 3.

  Further, the intake pipe 6 and the water absorption part 7 are arranged so that the intake direction to the pump chamber 3 and the water absorption direction are substantially the same. Specifically, the intake pipe 6 and the water absorption part 7 are arranged so that the intake direction and the water absorption direction to the pump chamber 3 are substantially the same as the direction of the rotation axis A of the impeller 5. That is, the intake direction and the water absorption direction to the pump chamber 3 are mainly downward (Z2 direction).

  Moreover, in 1st Embodiment, as shown in FIG. 2, the rotating shaft A of the impeller 5 is comprised so that it may be arrange | positioned inside the outer periphery of the intake pipe 6 (pipe part 61) in planar view. As shown in FIG. 3, the submersible pump 1 is configured such that the center of gravity G is disposed inside the outer periphery of the float 8 in plan view. More preferably, the submersible pump 1 is configured such that the center of gravity G is disposed inside the outer periphery of the intake pipe 6 (pipe portion 61) in plan view.

(Effect of 1st Embodiment)
In the first embodiment, the following effects can be obtained.

  In the first embodiment, as described above, the intake pipe 6 that guides air is provided in the pump chamber 3, and the submersible pump 1 and the intake pipe 6 are arranged linearly along the direction in which the intake pipe 6 extends. As a result, the air and liquid guided to the pump chamber 3 can be effectively agitated and mixed by the impeller 5 in the pump chamber 3, so that aeration can be achieved by effectively mixing the air and liquid. It can be carried out. Further, since the submersible pump 1 and the intake pipe 6 can be arranged linearly, the center of gravity of the aerator 100 can be arranged directly below the intake pipe 6. Thereby, since the submersible pump 1 can be easily supported by the float 8 via the intake pipe 6, the submersible pump 1 can be easily floated and supported by a simple configuration. As a result, aeration can be performed by effectively mixing air and liquid while simplifying the apparatus. Moreover, since the aerator 100 can be installed on the water surface basis by the float 8, the aerator 100 can be easily installed even in an environment where the bottom surface is unstable such as a tank or a pond in which liquid is stored.

  In the first embodiment, as described above, the intake pipe 6 and the water absorption unit 7 are arranged in the vicinity of the suction port 32 of the pump chamber 3 so that air and liquid merge. Thereby, air and liquid can be effectively mixed in the vicinity of the suction port 32 of the pump chamber 3. Further, since the liquid and the air can be merged at the suction port 32 of the pump chamber 3 where the flow rate of the liquid is increased, the suction pipe 6 is effectively fed into the intake pipe 6 by the speed at which the liquid flows into the pump chamber 3 from the water absorbing portion 7. Negative pressure can be generated. Thereby, air can be efficiently inhaled from the intake pipe 6.

  In the first embodiment, as described above, the intake pipe 6 and the water absorption portion 7 are arranged so that the intake direction to the pump chamber 3 and the water absorption direction are substantially the same. Thereby, since air and liquid can be smoothly flowed into the pump chamber 3, pressure loss can be suppressed.

  In the first embodiment, as described above, the intake pipe 6 and the water absorption part 7 are arranged so that the intake direction and the water absorption direction to the pump chamber 3 are substantially the same as the direction of the rotation axis A of the impeller 5. As a result, air and liquid can flow into the pump chamber 3 along the direction of the rotation axis A, so that air and liquid can flow into the pump chamber 3 more efficiently using the negative pressure generated by the rotation of the impeller 5. In addition, the air and liquid can be efficiently stirred in the pump chamber 3 by the rotation of the impeller 5.

  In 1st Embodiment, as mentioned above, the water absorption part 7 is comprised so that a liquid may be guide | induced to the pump chamber 3 along the outer side of the intake pipe 6. As shown in FIG. Thereby, since it is not necessary to arrange | position the water absorption part 7 so that it may cross | intersect inside the intake pipe 6 which continues to the pump chamber 3 from the upper surface of a water surface, it can suppress that the structure of the water absorption part 7 becomes complicated.

  In 1st Embodiment, as mentioned above, the water absorption part 7 and the intake pipe 6 are formed so that it may have a double pipe structure. As a result, liquid (water) is introduced from between the outer tube and the inner tube of the double-pipe structure, and the intake pipe 6 (inner tube) is formed at the center of the double tube where the negative pressure effect is increased. Therefore, the pressure generation phenomenon by the gas-liquid mixed fluid can be obtained with a simple configuration without obstructing the basic principle of the centrifugal pump that gives energy to the fluid by the rotation of the impeller 5.

  In the first embodiment, as described above, the liquid suction port of the water suction portion 7 is disposed in the vicinity of the suction port 32 of the pump chamber 3 and is configured to suck the liquid from the side with respect to the intake pipe 6. . Thereby, compared with the case where the liquid suction port of the water absorption part 7 is arrange | positioned in the position away from the pump chamber 3, it can suppress that the distance of the flow-path part which guides the liquid of the water absorption part 7 becomes large. And the enlargement of the whole apparatus of the aerator 100 can be suppressed.

  In the first embodiment, as described above, the intake pipe 6 is provided with a plurality of holes 622 having a diameter smaller than the pipe diameter at the end on the pump chamber 3 side, and gas is supplied from the plurality of holes 622 to the pump chamber 3. Configure to be supplied. Thereby, since the diameter of the bubble supplied from the intake pipe 6 can be made small, the contact area of the liquid with respect to the air per unit volume can be enlarged. Thereby, air can be efficiently dissolved in the liquid.

  In the first embodiment, as described above, the motor 10, the pump chamber 3, and the intake pipe 6 are arranged in this order along the direction in which the intake pipe 6 extends. Thereby, since air can be directly led from the intake pipe 6 to the pump chamber 3, the intake efficiency can be effectively increased.

  In the first embodiment, as described above, the intake pipe 6 is formed in a linear shape so as to extend in the substantially same direction as the rotational axis direction of the impeller 5. Accordingly, the structure of the intake pipe 6 can be simplified and the submersible pump 1 can be disposed immediately below the intake pipe 6, so that the aerator 100 is supported by supporting the submersible pump 1 with the float 8 via the intake pipe 6. The center of gravity of the entire device is not greatly destroyed.

  In 1st Embodiment, as mentioned above, the impeller 5 is comprised so that the rotating shaft A may be arrange | positioned inside the outer periphery of the intake pipe 6 in planar view. Thereby, since the rotation axis A of the impeller 5 can be disposed in the vicinity of the center line of the intake pipe 6, the submersible pump 1 can be supported by the float 8 via the intake pipe 6 more stably.

  In 1st Embodiment, as mentioned above, the submersible pump 1 is comprised so that a gravity center may be arrange | positioned inside the outer periphery of the float 8 in planar view. As a result, the center of gravity of the submersible pump 1 can be disposed directly below the float 8. Therefore, the submersible pump 1 is supported while being supported by only suspending the submersible pump 1 from the float 8. be able to.

  In the first embodiment, as described above, a plurality of discharge portions 33 are provided around the pump chamber 3 at substantially equal intervals. Thereby, since the reaction force of the discharge from the discharge part 33 can be offset in a balanced manner by the discharge from the plurality of discharge parts 33, the posture of the submersible pump 1 can be easily maintained.

  In the first embodiment, the intake pipe 6 is disposed so as to penetrate the float 8 as described above. Thereby, the buoyancy of the float 8 can be stably transmitted to the intake pipe 6.

  In the first embodiment, as described above, the position adjusting unit 9 that adjusts the vertical position of the float 8 with respect to the intake pipe 6 is provided. Thereby, the installation depth of the aerator 100 can be easily adjusted.

  In the first embodiment, as described above, the position adjusting unit 9 is formed in a bowl shape, and the lower surface is in contact with the upper surface of the float 8 and the fixed position in the vertical direction with respect to the intake pipe 6 can be adjusted. Thereby, since it is not necessary to couple | bond the float 8 and the position adjustment part 9 directly, it is not necessary to make a hole in the float 8 which has a foaming material or a hollow structure, or to tighten.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, an example of an aerator 200 having a configuration in which a valve is provided in each of the intake pipe and the water absorption portion will be described.

  Here, in 2nd Embodiment, as shown in FIG. 5, the submersible pump 1 and the intake pipe 6 are arrange | positioned linearly along the direction where the intake pipe 6 is extended. The intake pipe 6 is provided with a valve 64 whose opening degree can be adjusted. Moreover, the water absorption part 7 is provided with a valve 74 whose opening degree can be adjusted. The valve 64 is configured to adjust the flow rate of air sucked from the intake pipe 6 by adjusting the opening degree. Further, the valve 74 adjusts the flow rate of the liquid absorbed from the water absorption part 7 by adjusting the opening degree. For example, according to the depth position where the aerator 200 is installed, the opening degree of the valves 64 and 74 is adjusted in order to increase the intake negative pressure. For example, when the aerator 200 is installed at a deep position, the opening degree of the valve 74 is reduced (reducing the flow rate), and when the aerator 200 is installed at a shallow position, the opening degree of the valve 74 is decreased (increasing the flow rate). ).

  In addition, the other structure of 2nd Embodiment is the same as that of the said 1st Embodiment.

(Effect of 2nd Embodiment)
In the second embodiment, the following effects can be obtained.

  In the second embodiment, as in the first embodiment, aeration can be performed by effectively mixing air and liquid while simplifying the apparatus.

  Moreover, in 2nd Embodiment, the valves 64 and 74 which can adjust an opening degree are provided in the intake pipe 6 and the water absorption part 7. FIG. Thereby, since the flow rate of air or the flow rate of liquid can be adjusted according to the depth at which the aerator 200 is installed, air and liquid can be sucked and discharged in a balanced manner regardless of the depth. That is, even when the installation water depth of the aerator 200 is changed, the supply air volume and the convection strength can be adjusted according to the application and environmental change by adjusting the opening degree of the valves 64 and 74.

  The remaining effects of the second embodiment are similar to those of the aforementioned first embodiment.

[Third Embodiment]
Next, a third embodiment of the present invention will be described with reference to FIG. In the third embodiment, an example of an aerator 300 configured to absorb water without providing a strainer will be described, unlike the first and second embodiments in which a water absorbing portion is provided with a strainer.

  Here, in the third embodiment, as shown in FIG. 6, the submersible pump 1 and the intake pipe 6 are linearly arranged along the direction in which the intake pipe 6 extends. Further, the water absorption part 7 includes a water absorption pipe 75. The water absorption pipe 75 has a cylindrical shape. Further, a plurality of suction ports 751 are provided on the side surface of the water absorption pipe 75. The suction port 751 is configured to suck water in the horizontal direction. The suction port 751 is provided with a filter. The filter includes, for example, a net member. The liquid suction port 751 of the water absorption unit 7 is disposed in the vicinity of the suction port 32 of the pump chamber 3. The suction port 751 is configured to suck liquid from the side with respect to the intake pipe 6.

  The remaining configuration of the third embodiment is similar to that of the aforementioned first embodiment.

(Effect of the third embodiment)
In the third embodiment, the following effects can be obtained.

  In the third embodiment, as in the first embodiment, aeration can be performed by effectively mixing air and liquid while simplifying the apparatus.

  Moreover, in 3rd Embodiment, the structure of the water absorption part 7 can be simplified by comprising the water absorption part 7 with the water absorption pipe 75. FIG.

(Modification)
The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiment but by the scope of claims for patent, and further includes all modifications (modifications) within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the first to third embodiments, four discharge units are provided, and an example of a configuration in which liquid and air are discharged in four directions is shown, but the present invention is not limited to this. In the present invention, three or less discharge units or five or more discharge units may be provided. In this case, it is preferable to arrange the discharge portions at equal intervals.

  Moreover, in the said 1st-3rd embodiment, although the example of the structure whose discharge direction of a discharge part is a substantially horizontal direction was shown, this invention is not limited to this. In the present invention, the discharge direction of the discharge unit may be slightly upward with respect to the horizontal direction or slightly downward with respect to the horizontal direction. Further, the discharge direction of the discharge unit may be a direction inclined from the radial direction of the impeller in the horizontal direction. That is, the discharge direction of the discharge unit may have a component in the circumferential direction of the impeller in the horizontal direction.

  Moreover, in the said 1st-3rd embodiment, although the example of the structure which the intake part of the intake pipe opened upwards was shown, this invention is not restricted to this. In the present invention, the intake portion of the intake pipe may be open laterally or obliquely.

  Moreover, although the said 1st-3rd embodiment showed the example of the structure by which the several hole which has a diameter smaller than a pipe diameter was provided in the front-end | tip of an intake pipe, this invention is not limited to this. In the present invention, an opening with the inner diameter of the pipe may be provided at the tip of the intake pipe.

  Moreover, in the said 1st-3rd embodiment, although the front-end | tip of the intake pipe showed the example of the structure which has hemispherical shape, this invention is not limited to this. In the present invention, the tip of the intake pipe may have a shape other than a hemispherical shape. For example, the tip of the intake pipe may have a flat shape or a sharp shape such as a conical shape.

  Moreover, in the said 1st-3rd embodiment, although the example of the structure supported in the state which the submersible pump floated was shown, this invention is not limited to this. In the present invention, the aerator may be installed with the submersible pump in contact with the bottom of the submersible. Moreover, you may provide the leg part for mounting in the lower part of a submersible pump.

  Moreover, in the said 2nd Embodiment, although the example of the structure by which the valve | bulb which can adjust an opening degree was provided in both the intake pipe and the water absorption part was shown, this invention is not limited to this. In the present invention, a valve may be provided on one of the intake pipe and the water absorption part.

DESCRIPTION OF SYMBOLS 1 Submersible pump 3 Pump chamber 5 Impeller 6 Intake pipe 7 Water suction part 8 Float 9 Position adjustment part 10 Motor 32 Suction port 33 Discharge part 64, 74 Valve 72 Strainer (suction port)
100, 200, 300 Aerator 622 hole 751 inlet

Claims (17)

A submersible pump including a pump chamber provided with an impeller;
An intake pipe for guiding air to the pump chamber;
A float arranged so as to surround the intake pipe,
The aerator in which the submersible pump and the intake pipe are arranged linearly along a direction in which the intake pipe extends. The pump chamber further includes a water absorption part for guiding the liquid,
The aerator according to claim 1, wherein the intake pipe and the water absorption portion are arranged so that air and liquid merge in the vicinity of the suction port of the pump chamber.   The aerator according to claim 2, wherein the intake pipe and the water absorption part are arranged so that an intake direction to the pump chamber and a water absorption direction are substantially the same.   The aerator according to claim 3, wherein the intake pipe and the water absorption portion are arranged such that an intake direction and a water absorption direction to the pump chamber are substantially the same as a rotation axis direction of the impeller.   5. The aerator according to claim 3, wherein the water absorption portion is configured to guide liquid to the pump chamber along an outside of the intake pipe.   The aerator according to claim 5, wherein the water absorption portion and the intake pipe are formed to have a double pipe structure.   The liquid suction port of the water absorption part is arranged in the vicinity of the suction port of the pump chamber and configured to suck liquid from the side with respect to the intake pipe. The aerator according to item 1.   The aerator according to any one of claims 2 to 7, wherein a valve capable of adjusting an opening degree is provided in at least one of the intake pipe and the water absorption part.   The intake pipe is configured such that a plurality of holes having a diameter smaller than a pipe diameter are provided at an end portion on the pump chamber side, and gas is supplied to the pump chamber from the plurality of holes. Item 9. The aerator according to any one of items 1 to 8. The submersible pump includes a motor that rotates the impeller,
The aerator according to any one of claims 1 to 9, wherein the motor, the pump chamber, and the intake pipe are arranged in this order along a direction in which the intake pipe extends.   The aerator according to any one of claims 1 to 10, wherein the intake pipe is formed in a straight line so as to extend in a direction substantially the same as a rotation axis direction of the impeller.   The aerator according to any one of claims 1 to 11, wherein the impeller is configured such that a rotation axis is disposed inside an outer periphery of the intake pipe in a plan view.   The aerator according to any one of claims 1 to 12, wherein the submersible pump is configured so that a center of gravity is disposed inside an outer periphery of the float in a plan view. A discharge unit connected to the pump chamber for discharging air and liquid;
The aerator according to claim 1, wherein a plurality of the discharge units are provided at substantially equal intervals around the pump chamber.   The aerator according to claim 1, wherein the intake pipe is disposed so as to penetrate the float.   The aerator according to claim 1, further comprising a position adjustment unit that adjusts a position of the float in a vertical direction with respect to the intake pipe.   The aerator according to claim 16, wherein the position adjusting unit is formed in a bowl shape, and a lower surface thereof is in contact with an upper surface of the float and is capable of adjusting a fixed position in a vertical direction with respect to the intake pipe. .

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