Bubble fountain-style water circulation device

Abstract

The invention relates to a bubble fountain-type water circulation device and, more specifically, an improved bubble fountain-type water circulation device in which a centrifugal pump and a jet pump are combined to circulate water through the function of the centrifugal pump and simultaneously draw in air through the function of the jet pump, allowing the water of a large reservoir to circulate in a highly oxygen-saturated state so that the anaerobic water of the bottom layer is drawn up to the surface layer to increase the dissolved oxygen levels necessary for the self-cleaning activity of aerobic microorganisms, thereby improving the water quality efficiency of the reservoir.

Description

Bubble fountain type water circulation device

[0001] The present invention relates to a bubble fountain type water circulation device, and more particularly, to an improved bubble fountain type water circulation device that combines a centrifugal pump and a jet pump to circulate water with the centrifugal pump function and simultaneously suck in air with the jet pump function to circulate water in a large-capacity reservoir with high oxygen saturation, thereby raising anaerobic bottom water to the surface and increasing dissolved oxygen necessary for the self-purification activity of aerobic microorganisms, thereby effectively improving the water quality of the reservoir.

[0002] Water from reservoirs or still lakes that serve as sources of drinking water can become polluted.

[0003] Typically, reservoir or lake water is divided into surface and deep water layers based on depth. The surface layer, which extends to a depth of about 8 meters, is characterized by relatively high oxygen concentrations due to its easy contact with the atmosphere, leading to a thriving plankton population. However, when plankton reach their reproductive limit, they die and settle on the waterbed. This causes organic matter to decompose in the deep water layer, below 18 meters, producing nutrients such as nitrogen and phosphorus, which further pollute the water.

[0004] In addition, as modern society develops, population density increases and the use of synthetic chemicals increases, which leads to an increase in the discharge of pollutants, and various pollutants flow into reservoirs and lakes, resulting in frequent occurrences of pollution, eutrophication, and green algae.

[0005] Although various efforts are being made to solve these problems, the downside is that the costs increase exponentially because the area is so large.

[0006] The most realistic alternative is to assess the water quality in reservoirs or lakes and then inject appropriate decontamination chemicals. However, this leads to further pollution and continues to raise concerns about human health hazards.

[0007] One of the related prior arts is Patent Document 1 (Registered Utility Model No. 20-0261489, Upward Vertical Aeration Type Underwater Oxygen Supply Device).

[0008] The above patent document 1 is intended to prevent contamination by performing aeration by forming a simple circulation structure that is installed in an aeration tank and sucks and discharges water by a fan.

[0009] However, Patent Document 1 has structural limitations that make it difficult to process large quantities, and although it is easy to install in a limited space such as an aeration tank, it cannot be installed and used in an open space such as a reservoir or lake.

[0010] In addition, since it is a simple suction-discharge type, the aeration power is weak, making it difficult to treat large quantities, which limits its ability to eliminate eutrophication.

[0011] Another prior art is Patent Document 2 (Domestic Publication No. 20-1996-0037409, Reservoir Water Quality Improvement Device).

[0012] The above patent document 2 has the characteristic of contributing to eliminating pollution by drawing up and circulating water from the depths of the reservoir while anchored to the reservoir.

[0013] Although this is a concept that is consistent with the present invention, it has the limitation of low efficiency due to weak aeration force with a simple impeller structure.

[0014] Therefore, it is a structure that needs improvement as it is not suitable for large-scale long-term processing.

[0015] Another prior art is Patent Document 3 (Domestic Patent No. 10-1341136, Real-time water quality management system for reservoirs or rivers).

[0016] The above patent document 3 is characterized by being able to accurately grasp the situation inside the reservoir by continuously measuring in real time the type of pollutant source inside the reservoir, the pollutant concentration, and other pollution information, as well as dynamic information, such as water depth, water level, flow rate, and flow rate, and accordingly changing the location of chemical injection in real time to concentrate on the pollutant source or to place it in a mutually organic location, and applying the amount of chemical injected at each location differently, thereby enabling the pollutant source to be removed more quickly.

[0017] However, Patent Document 3 is limited to partial decontamination, has limitations in its ability to treat simultaneous contamination, and above all, has limitations in that it is a treatment method using chemicals.

[0018] The present invention has been created to solve the above-described problems of the prior art, and the main purpose of the present invention is to provide an improved bubble fountain-type water circulation device that combines a centrifugal pump and a jet pump to circulate water with the centrifugal pump function and simultaneously suck in air with the jet pump function so that the water in a large-capacity reservoir is circulated at a high oxygen saturation level, thereby raising the anaerobic bottom water to the surface and increasing the dissolved oxygen necessary for the self-purification activity of aerobic microorganisms, thereby effectively improving the water quality of the reservoir.

[0019] The present invention provides a bubble fountain type water circulation device, which comprises a suction pipe installed underwater in a reservoir or lake, an impeller connected to the suction pipe, and a distribution plate for discharging deep water sucked by the impeller in a radial direction, and which mixes the deep water sucked by the impeller with external air through the distribution plate to increase the oxygen saturation level and disperses it to the upper surface water, as a means for achieving the above-mentioned object.

[0020] At this time, the suction pipe may be a bellows-shaped flexible pipe.

[0021] Additionally, a support may be installed at the bottom of the suction pipe to space the bottom of the suction pipe from the bottom of the reservoir or lake by a certain height.

[0022] In addition, the upper end of the suction pipe may be fixed to the main body housing, at least a portion of the impeller may be built into the main body housing, and the distribution plate may be fixed to the upper portion of the main body housing at a position above the impeller. In addition, a fixed frame may be installed around the lower perimeter of the main body housing.

[0023] In addition, one end of a fixed bar is hinge-fixed to a portion of the circumference of the main body housing, a buoyancy material is fixed to the other end of the fixed bar, one end of a turnbuckle is fixed to a portion of the length of the fixed bar, the other end of the turnbuckle is fixed to a top plate, the top plate is fixed to the top of a vertical frame, the lower end of the vertical frame is vertically fixed on the fixed frame, and a fixed plate having a hole of a certain size can be mounted on the open top of the main body housing.

[0024] A plurality of legs can be fixed to the above vertical frame.

[0025] Additionally, at least one wire may be tied around the circumference of the main body housing, and an anchor may be fixed to the end of the wire.

[0026] In addition, a fixed plate having a hole of a certain size is mounted on the open upper portion of the main body housing, a vertical frame is fixed to the fixed frame, a top plate is fixed to the upper portion of the vertical frame, a driving motor is fixed to the upper surface of the top plate, a rotational shaft of the driving motor passes through the top plate and is coupled to an impeller shaft by a coupler in a space between the top plate and the fixed plate, and a distribution plate is fixed around a hole formed in the center of the fixed plate, and the impeller shaft can be fixed to the impeller by passing through the distribution plate.

[0027] In addition, the impeller has a lower end of an impeller shaft fixed to a bearing on a shaft support fixed to the lower surface of a fixed plate, the impeller shaft is fixed to the center of the impeller plate, the shaft support is arranged in the main body housing, the impeller plate is fitted into a hole formed in the center of the distribution plate, and horizontal blades and vertical blades can be formed on the lower surface of the impeller plate.

[0028] Additionally, a plurality of vanes may be formed at radial intervals on the upper surface of the impeller plate.

[0029] In addition, the distribution plate may have a plurality of guide vanes fixed to the surface at regular intervals along the radial direction, the upper portion of the guide vane may be blocked by a vane cover plate, and a hole may be formed in the center of the vane cover plate into which an impeller plate is fitted.

[0030] Additionally, the guide vane may be configured to bend clockwise or counterclockwise.

[0031] In addition, a number of fixing grooves are perforated along the radial direction on the plate surface of the above-mentioned vane cover plate, and a fitting projection is protruded from each of the upper ends of the guide vanes so that they can be fitted and fixed to each other.

[0032] Additionally, the hole formed in the center of the vane cover plate may be configured to be larger than the diameter of the impeller plate so that a gap is formed between them.

[0033] Additionally, serrated edges may be formed on the periphery of the distribution plate.

[0034] Additionally, a number of suction holes may be formed in the radial direction corresponding to the guide vane in the above-mentioned vane cover plate.

[0035] In addition, the suction hole may be formed in a rectangular shape, but may be configured to have a structure in which only three sides are cut and the remaining side is pressed downward while being attached to the vane cover plate.

[0036] According to the present invention, the following effects can be obtained.

[0037] First, the anaerobic bottom water is brought up to the surface through a 1,760 RPM centrifugal pump vertical blade, thereby increasing the dissolved oxygen required for the self-purification activity of aerobic microorganisms.

[0038] Second, the water is circulated by the horizontal blades of the centrifugal pump, and at the same time, the air is sucked in by the jet pump function that utilizes the pressure difference due to the high flow rate, so that the water in the large-capacity reservoir is circulated at a high oxygen saturation level, thereby effectively improving the water quality of the reservoir.

[0039] Third, it circulates large volumes of water by sucking in air and aerating it, contributing to rapid self-purification and water quality improvement.

[0040] Fourth, by spraying in a radial direction like a fountain, a visual effect in the form of a fountain show can also be achieved.

[0041] Figure 1 is an exemplary cross-sectional view of a device according to the present invention.

[0042] Figure 2 is an exemplary plan view of a device according to the present invention.

[0043] Figures 3a and 3b are exemplary drawings showing the distribution plate and impeller structure constituting the device according to the present invention.

[0044] Figures 4a and 4b are exemplary drawings showing the distribution plate and impeller structure constituting the device according to the present invention.

[0045] Figure 5 is an exemplary diagram of an impeller constituting a device according to the present invention.

[0046] Figures 6 and 7 are explanatory drawings explaining the fluid flow during the operation of the distribution plate and impeller of Figure 3.

[0047] FIG. 8a, FIG. 8b and FIG. 8c are exemplary drawings showing other examples of the distribution plate and impeller structure constituting the device according to the present invention.

[0048] Figure 9 is an explanatory diagram explaining the fluid flow during operation of the distribution plate and impeller of Figure 8.

[0049] Hereinafter, a preferred embodiment according to the present invention will be described in more detail with reference to the attached drawings.

[0050] Before describing the present invention, the following specific structural and functional descriptions are merely illustrative for the purpose of explaining embodiments according to the concept of the present invention, and embodiments according to the concept of the present invention may be implemented in various forms and should not be construed as being limited to the embodiments described in this specification.

[0051] Furthermore, since embodiments according to the concept of the present invention can be modified in various ways and take on various forms, specific embodiments are illustrated in the drawings and described in detail herein. However, this is not intended to limit embodiments according to the concept of the present invention to specific disclosed forms, and it should be understood that all modifications, equivalents, and alternatives included within the spirit and technical scope of the present invention are included.

[0052] The bubble fountain type water circulation device according to the present invention is a device that raises the dissolved oxygen necessary for the self-purification activity of aerobic microorganisms by drawing up anaerobic bottom water to the surface through an impeller that rotates at a high speed of 1,760 RPM.

[0053] In particular, the present invention is a bubble fountain type water circulation device having a structure that combines the functions of a centrifugal pump and a jet pump, which circulates water with the centrifugal pump function and simultaneously sucks in air with the jet pump function to circulate water in a large-capacity reservoir with high oxygen saturation, thereby effectively improving the water quality of the reservoir.

[0054] That is, it has a structure in which water from the bottom that is low in dissolved oxygen is drawn up to the surface through a suction hose (3-10 m) made of urethane that can be expanded and contracted using a centrifugal pump, and air is sucked in through the suction part by the jet pump function due to the high flow rate at the outlet of the centrifugal pump, thereby increasing the oxygen saturation and spraying it in the form of a fountain without a separate external air supply device.

[0055] Here, a centrifugal pump is a pump that utilizes centrifugal force generated by rotating an impeller to provide rotational force to a liquid. The liquid that enters the center of the impeller through the suction pipe receives rotational force as it passes between the vanes, which increases the pressure, and is then sprayed in a radial direction by that rotational force.

[0056] And, the jet pump is composed of a working nozzle connected to a diffuser and a mixing chamber, and the two parts, the working nozzle and the diffuser, form a special fluid flow duct of various cross-sections, and the working fluid is sprayed from the nozzle at high pressure and high speed, and during the spraying process, the fluid flow passes through the nozzle and is a pump that converts static pressure energy into kinetic energy.

[0057] The present invention functionally combines the impeller of a centrifugal pump and the diffuser of a jet pump to form a radial spray shape with a high spraying force, thereby forming a form similar to a fountain show.

[0058] In addition, the present invention not only rapidly increases the oxygen saturation by expanding the contact area with oxygen by spraying it in the form of a bubble fountain and scattering it, but above all, it has the special advantage of being able to be used for a long period of time without breakdown by implementing a drive system without using a reducer that is difficult to maintain.

[0059] That is, the bubble fountain type water circulation device according to the present invention includes a suction pipe installed underwater in a reservoir or lake, an impeller connected to the suction pipe, and a distribution plate that discharges deep water sucked by the impeller in a radial direction; and is characterized in that the deep water sucked by the impeller is mixed with outside air through the distribution plate and is sprayed to the upper surface water in a state of increasing oxygen saturation.

[0060] More specifically, as shown in the examples of FIGS. 1 and 2, the bubble fountain type water circulation device according to the present invention includes a suction pipe (100).

[0061] The suction pipe (100) is installed underwater in a reservoir or lake.

[0062] That is, it is configured to suck up deep water, and the sucked up deep water is scattered over the surface water.

[0063] This is to increase oxygen saturation by sucking up deep water, which has relatively low dissolved oxygen compared to surface water, and allowing it to come into contact with air over as wide an area as possible.

[0064] Then, as the water of the reservoir or lake mixes with high oxygen saturation, the dissolved oxygen content of the deep water increases, which prevents eutrophication and suppresses water decay, thereby eliminating or preventing pollution.

[0065] In addition, it is preferable that the suction pipe (100) be configured as a bellows (also known as a 'jabara' type)-shaped flexible pipe so that the length can be adjusted and the resistance can be minimized by deforming according to the flow of water.

[0066] In particular, the suction pipe (100) is a flexible pipe made of urethane material that can expand and contract and can have a length of about 3-10 m.

[0067] Additionally, a stand (110) is fixed to the bottom of the suction pipe (100).

[0068] The pedestal (110) is intended to keep the lower end of the suction pipe (100) at a certain height from the bottom of the reservoir or lake.

[0069] The reason why a pedestal (110) is necessary is because the bottom of a reservoir or lake is usually a layer of mud like mud, and if the lower end of the suction pipe (100) gets stuck in this layer of mud, it will not be possible to suck up deep water.

[0070] Meanwhile, the upper end of the suction pipe (100) is fixed to the main body housing (200).

[0071] And, a fixed frame (210) is installed around the lower perimeter of the main body housing (200).

[0072] At this time, the fixed frame (210) does not need to be limited to a special shape, but can be fixed to the periphery of the main body housing (200) so as to preferably have a triangular shape.

[0073] In addition, a vertical frame (270) that is vertically fixed on the fixed frame (210) is further provided, and a plurality of legs (220) are fixed to the vertical frame (270).

[0074] The leg (220) is intended to facilitate the installation work by securing space by separating a certain height from the ground when the main body housing (200) is placed on the ground to install the suction pipe (100) to the main body housing (200).

[0075] The leg (220) does not need to be specifically limited, but it is preferable to have a tripod-shaped structure that matches the shape of the fixed frame (210).

[0076] In addition, one end of a fixed bar (230) is hingedly fixed to a portion of the circumference of the main body housing (200), and a buoyancy material (240) is fixed to the other end of the fixed bar (230).

[0077] In this case, the buoyancy material (240) is preferably a float, and it is particularly preferable to have three of them at a 120 degree angle as in the example.

[0078] In addition, a turnbuckle (250) is fixed to a portion of the length of the fixed bar (230), and the fixed bar (230) can be raised and lowered by tightening and loosening the turnbuckle (250).

[0079] This is to control the immersion depth of the main body housing (200) by controlling the floating position of the buoyancy material (240) on the water surface.

[0080] Here, the other end of the turnbuckle (250) is fixed to the top plate (260), and the top plate (260) is fixed to the top of the vertical frame (270).

[0081] Additionally, the lower part of the vertical frame (270) is vertically fixed on the fixed frame (210).

[0082] In addition, a fixing plate (280) with a hole of a certain size is installed and fixed on the open top of the main body housing (200).

[0083] At this time, there is no need to limit the shape of the fixed plate (280), but it is preferable to have a triangular shape corresponding to the shape of the fixed frame (210) together with the upper plate (260), and each vertex is firmly fixed to the vertical frame (270).

[0084] In addition, at least one wire (120) is tied to the fixed plate (280), and an anchor (130) is fixed to the end of the wire (120), so that the anchor (130) is anchored to the bottom of a reservoir or lake, thereby allowing the main body housing (200) to be anchored in one place without floating.

[0085] In addition, a driving motor (290) is fixed to the upper surface of the upper plate (260), and the rotation axis of the driving motor (290) vertically penetrates the upper plate (260) and is exposed in the space between the upper plate (260) and the fixed plate (280), and is coupled to the impeller shaft (410) by a coupler (292) in that space.

[0086] And, a distribution plate (300) is fixed around the hole formed in the center of the fixed plate (280) to form an integral body.

[0087] Then, the impeller shaft (410) is inserted into the main body housing (200) through the distribution plate (300) and is fixed to the impeller (400) which is at least partially provided inside the main body housing (200).

[0088] Accordingly, as the impeller (400) rotates, the deep water sucked in through the suction pipe (100) installed underwater in the reservoir or lake is discharged and scattered in the radial direction through the distribution plate (300), thereby increasing the oxygen saturation through contact with the outside air.

[0089] And, as this process occurs repeatedly, the deep water and surface water mix, increasing the amount of dissolved oxygen in the water, which prevents eutrophication and pollution in reservoirs or lakes.

[0090] On the other hand, the impeller (400) has the lower end of the impeller shaft (410) fixed to the bearing on the shaft support (282) fixed to the lower surface of the fixed plate (280), as shown in the examples of FIGS. 3 to 5, the impeller shaft (410) is fixed to the center of the impeller plate (420), and the shaft support (282) is placed in the main body housing (200).

[0091] At this time, the impeller plate (420) is fitted into a hole formed in the center of the distribution plate (300), and horizontal blades (430) and vertical blades (440) are formed on the lower surface of the impeller plate (420).

[0092] Here, the vertical blade (440) can suck up water from the bottom by providing a suction force in the vertical direction, and the horizontal blade (430) provides a discharge force to discharge water in the radial direction by increasing the head difference of the sucked water while rotating clockwise.

[0093] To this end, the horizontal blades (430) are arranged to form a spiral in a clockwise direction based on the impeller shaft (410), which is the center of the circle, and the vertical blades (440) are extended vertically downwards by a certain length relative to the impeller plate (420) and have a shape in which the ends are inclined and the blade plates are attached.

[0094] Thus, it operates by generating a pressure difference during rotation, causing deep water to be sucked up.

[0095] And, a plurality of guide vanes (310) are fixed to the surface of the distribution plate (300) at regular intervals along the radial direction.

[0096] The guide vane (310) is designed to smoothly disperse the deep water discharged by the horizontal blade (430) in the radial direction, and is bent in the discharge direction of the horizontal blade (430) so that the deep water discharged from the horizontal blade (430) naturally flows into the guide vane. However, in the example of the present invention, it is provided to be bent counterclockwise in the drawing.

[0097] The reason why the guide vane (310) is absolutely necessary when the horizontal blade (430) constituting the impeller (400) rotates clockwise to scatter deep water is that since the body floats in the water, the body rotates in the opposite direction of the water being discharged as a reaction to the water being discharged in the circumferential direction through the horizontal blade (430). However, since the deep water is discharged in the radial direction by the guide vane (310), the rotational force is eliminated, so that the equipment can be maintained stably without rotating, and since this rotational energy is converted into discharge energy, it can be scattered at an even higher pressure, so that a waterfall-type or aeration-type fountain show can be implemented.

[0098] In addition, in order to obtain the deep water scattering effect of the guide vane (310), the upper part of the guide vane (310) must be sealed, which is achieved by the vane cover plate (320).

[0099] The vane cover plate (320) is a circular plate with a hole formed in the center and is fixed to the upper portion of the guide vane (310).

[0100] Here, in order to facilitate fixing of the vane cover plate (320), a number of fixing grooves (322) are perforated along the radial direction on the plate surface of the vane cover plate (320), and a fitting projection (312) protrudes from the upper end of each guide vane (310) and is fixed by being fitted into the fixing groove (322).

[0101] In particular, the hole formed in the center of the vane cover plate (320) must be formed larger than the diameter of the impeller plate (420) so that a gap (G) is formed between them.

[0102] This is because it is a very important factor in increasing oxygen saturation by introducing outside air during deep water diving.

[0103] For example, according to FIGS. 6 and 7, when deep water is sucked up and then discharged laterally, i.e., radially, along the guide vane (310), external air is sucked in through the gap (G) between the vane cover plate (320) and the impeller plate (420) and mixed with the discharged deep water, and in the process, the oxygen saturation of the discharged deep water increases.

[0104] In addition, when it leaves the guide vane (310) and is scattered into the air, it is completely scattered, so the contact area with the air increases exponentially and the coral saturation level increases rapidly.

[0105] Moreover, the inflow of outside air increases the bubbling effect, strengthening the force of the jets to fly at an even faster rate.

[0106] On the other hand, in order to further enhance the above-described effect, the structure of the distribution plate (300) and the vein cover plate (320) can be improved.

[0107] According to the drawings 8 and 9, a sawtooth-shaped protrusion (330) can be formed on the peripheral surface of the distribution plate (300).

[0108] This contributes to increasing oxygen saturation as the water sprayed through the micro-saw blade multi-structure becomes finer and further increases the contact area with air.

[0109] Additionally, a plurality of vanes (422) can be formed at radial intervals on the upper surface of the impeller plate (420).

[0110] The vane (422) is intended to enhance exhaust capacity by increasing air mixing by increasing the flow of upper air.

[0111] In addition, a plurality of suction holes (324) can be further formed in the radial direction corresponding to the guide vane (310) in the vane cover plate (320).

[0112] The suction hole (324) is intended to achieve the same effect as the gap (G) described above, and to further enhance its performance.

[0113] At this time, the suction hole (324) is formed in a square shape, but is configured to have a structure in which only three sides are cut and the remaining side is pressed downward while being attached to the vane cover plate (320).

[0114] This provides a structure that prevents water from rising while allowing air to be sucked in easily and quickly by the Venturi effect.

[0115] Accordingly, the air intake effect is also increased.

[0116] As described above, the present invention combines a centrifugal pump and a jet pump to circulate water with the centrifugal pump function and simultaneously suck in air with the jet pump function to circulate water in a large-capacity reservoir with high oxygen saturation, thereby raising anaerobic bottom water to the surface and increasing dissolved oxygen necessary for the self-purification activity of aerobic microorganisms, thereby effectively improving the water quality of the reservoir.

Claims

1. Includes a suction pipe installed underwater in a reservoir or lake, an impeller connected to the suction pipe, and a distribution plate that discharges the deep water sucked by the impeller in a radial direction; A bubble fountain-type water circulation device characterized in that the deep water sucked up by the above impeller is mixed with outside air through the above distribution plate and sprayed to the upper surface water while increasing the oxygen saturation level.

2. In paragraph 1, A bubble fountain-type water circulation device characterized in that the above suction pipe is a bellows-shaped expansion pipe.

3. In paragraph 1, A bubble fountain-type water circulation device characterized in that a support is further installed at the bottom of the suction pipe to space the bottom of the suction pipe from the bottom of a reservoir or lake by a certain height.

4. In paragraph 1, A bubble fountain-type water circulation device characterized in that the upper end of the suction pipe is fixed to the main body housing, at least some of the impellers are built into the main body housing, and the distribution plate is fixed to the upper part of the main body housing.

5. In paragraph 4, A fixed frame is installed on the lower perimeter of the above main body housing, A vertical frame is further provided that is vertically fixed on the above fixed frame, A bubble fountain-type water circulation device characterized in that a plurality of legs are fixed to the above vertical frame.

6. In paragraph 5, A bubble fountain-type water circulation device characterized in that one end of a fixed bar is hinge-fixed to a portion of a circumference of the main body housing, a buoyancy material is fixed to the other end of the fixed bar, one end of a turnbuckle is fixed to a portion of the length of the fixed bar, the other end of the turnbuckle is fixed to a top plate, the top plate is fixed to the top of a vertical frame, the lower end of the vertical frame is vertically fixed on the fixed frame, and a fixed plate having a hole of a predetermined size is mounted on the open upper end of the main body housing.

7. In paragraph 5, A bubble fountain-type water circulation device characterized in that a fixed plate having a hole of a certain size is installed on the open upper portion of the main body housing, a vertical frame is fixed to the fixed frame, a top plate is fixed to the upper portion of the vertical frame, a driving motor is fixed to the upper surface of the top plate, a rotational shaft of the driving motor penetrates the top plate and is coupled to an impeller shaft by a coupler in the space between the top plate and the fixed plate, a distribution plate is fixed around a hole formed in the center of the fixed plate, and the impeller shaft penetrates the distribution plate and is fixed to the impeller.

8. In paragraph 7, A bubble fountain-type water circulation device characterized in that at least one wire is tied to the fixed plate and an anchor is fixed to the end of the wire.

9. In paragraph 1, A bubble fountain-type water circulation device characterized in that the impeller has its lower end fixed to a bearing on a shaft support fixed to the lower surface of a fixed plate, the impeller shaft is fixed to the center of the impeller plate, the shaft support is arranged in the main body housing, the impeller plate is fitted into a hole formed in the center of the distribution plate, and horizontal blades and vertical blades are formed on the lower surface of the impeller plate.

10. In paragraph 9, A bubble fountain-type water circulation device characterized in that a plurality of vanes are further formed at radial intervals on the upper surface of the impeller plate.

11. In paragraph 1, A bubble fountain-type water circulation device characterized in that the above distribution plate has a plurality of guide vanes fixed at regular intervals along the radial direction on the surface, the upper portion of the guide vane is blocked by a vane cover plate, and a hole into which an impeller plate is fitted is formed in the center of the vane cover plate.

12. In paragraph 11, A bubble fountain-type water circulation device characterized in that the above guide vane is configured to bend clockwise or counterclockwise.

13. In paragraph 11, A bubble fountain-type water circulation device characterized in that a plurality of fixing grooves are perforated along the radial direction on the plate surface of the above-mentioned vane cover plate, and a fitting projection is protruded from the upper end of each of the above-mentioned guide vanes to be fitted and fixed to each other.

14. In paragraph 11, A bubble fountain-type water circulation device characterized in that the hole formed in the center of the above-mentioned vane cover plate is formed to be larger than the diameter of the impeller plate so that a gap is formed between them.

15. In paragraph 11, A bubble fountain-type water circulation device characterized by having a sawtooth-shaped groove formed on the periphery of the distribution plate.

16. In paragraph 11, A bubble fountain-type water circulation device characterized in that a plurality of suction holes are further formed in the radial direction corresponding to the guide vane on the above vane cover plate.

17. In paragraph 16, A bubble fountain-type water circulation device characterized in that the suction hole is formed in a square shape, with only three sides cut off and the remaining side being pressed downward while attached to the vane cover plate.

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