JPH10323681A - Water cleaning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water cleaning device in which maintenance work of a submersible pump is easily performed without performing draining and underwater work and also a water cleaning function is efficiently continued. SOLUTION: A floating means 3 is provided so that a pump housing 1, in which a submersible pump 2 is accommodated in the inside, is converted to both such a submerged state that the pump housing 1 is sunk near to the water surface 81 and such a floating state that the pump housing 1 is floated on the water surface. The floating means is constituted of floating members 31, weights 32 and chains 33. A cleaning material unit 5 is constituted by filling charcoal 51 in the inside of a network storage vessel 52 and the pump housing communicates with a collection pipe 6 inserted into the inside. The discharge side of the submersible pump is connected to a water spray means 25 and an ejector 72 through the flow rate regulation valves 24, 26. The submersible pump is operated and water cleaned by microorganisms of charcoal is sprayed on water surface 81 through the water spray means. On one side, air supplied from an air introduction pipe 73 is mixed according to injection from the ejector and discharged and air diffusion for supplying oxygen to charcoal is performed. An intermittent air floating-up cylinder 9 is provided in the lower position of charcoal and air discharged from the ejector is intermittently discharged as air block and cleaning is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to lakes, marshes, natural ponds,
The present invention relates to a water purification device installed in an artificial pond or the like and used for purifying the water.

[0002]

2. Description of the Related Art Conventionally, as this type of water purification apparatus,
A pump housing in which a submersible pump is housed and a purifying material unit in which a purifying material is stored in a mesh or porous container are installed on the bottom of a natural pond, an artificial pond, or the like, and the pump housing and the purifying material unit are communicated. (See, for example, JP-A-9-24380). In this device, the submersible pump is suspended and fixed to a lid of the pump housing, and the suction side is disposed inside the pump housing, and the discharge side is disposed outside the pump housing. Then, the submersible pump is operated to return the water purified by the microorganism of the purifying material from the water collecting pipe to the natural pond, the artificial pond or the like. In addition, an air discharge pipe is disposed below the purifying material unit, and air is discharged from the air discharge pipe toward the purifying material unit using a blower or a compressor, thereby diffusing air for supplying oxygen to the purifying material. Or make it available for cleaning.

[0003]

In the above-mentioned conventional water purifier, the submersible pump is suspended and fixed to the lid of the pump housing, so that the submersible pump is maintained, inspected, repaired or replaced. When performing work, it is also possible to work on the water surface by lifting only the lid. However, since the pump housing is installed at the bottom of the water, it is not possible to reliably mount the lid together with the submersible pump on the pump housing, and it is necessary to perform underwater work or drainage of the water area. For this reason, a great deal of time and labor is required for the work such as drainage.

[0004] A blower or a compressor is used for diffusing or cleaning the purifying material, and it is necessary to operate these regularly to maintain the purifying action of water. For this reason, a large amount of energy is required to maintain the above-mentioned purifying action, and it cannot be performed efficiently.

The present invention has been made in view of such circumstances, and an object of the present invention is to facilitate maintenance work of a submersible pump and efficiently continue a water purification function. It is in.

[0006]

According to a first aspect of the present invention, there is provided a pump housing having a submersible pump housed therein, and a float member connected to the pump housing. Floating means for holding the pump housing floating on the water surface. In addition, a granular or flaky porous purifying material is housed in a container having a net-like or porous outer wall, and the purifying material unit is disposed in water. A water collecting pipe that is open toward the purifying material of the purifying material unit and that is arranged so that a downstream end communicates with a suction side of the submersible pump.

In the above configuration, by operating the submersible pump, the water in the water area where the present water purification device is installed passes between the purification materials in the purification material unit, and enters the pump housing through the water collection pipe. It is sucked in and this water is discharged back into the body outside the pump housing. At this time, when the water passes between the purifying materials in the purifying material unit, the water is purified by microorganisms that propagate in the purifying material, and the purified water is returned from the discharge side of the submersible pump to the water area, The water in the water area is purified. And in this configuration, since the pump housing is held in a state of floating on the water surface by the floating means, the maintenance work of the submersible pump can be performed without draining the water area where the present water purification device is installed. In addition, it is possible to reliably perform on the water surface without performing underwater work.

According to a second aspect of the present invention, the floating means in the first aspect of the invention is provided with a weight suspended and supported so as to be detachable, and the weight is converted into a disengaged form. The position of the pump housing can be changed between a submerged state in which the upper surface is located near the water surface and a floating state in which the pump housing projects upward from the water surface.

In the case of the above construction, when the appearance of the pump housing on the water surface is unpleasant, the weight is engaged with the pump housing in a suspended state, so that the pump housing is submerged. When the maintenance work of the submersible pump is performed while the water is being purified by disengaging the weight, the position of the pump housing is changed according to a situation such as disengagement of the weight to make the pump housing float. It becomes possible.

According to a third aspect of the present invention, in the first aspect of the present invention, a sprinkling means for projecting the discharge side of the submersible pump above the water surface and spraying the discharge water to the water surface is attached to the downstream end of the submersible pump. Configuration.

In the above configuration, when water is discharged by the operation of the submersible pump, the water is sprinkled on the surface of the water by the water sprinkling means. Is supplied, and the amount of dissolved oxygen in the water area is increased.

According to a fourth aspect of the present invention, in the first aspect of the present invention, there are provided a plurality of upper surface walls which are disposed on the water bottom and on which the purifying material unit is placed, and which are vertically penetrated. It is assumed that a purifying material unit mounting base formed by a wall material having a through hole and an air diffusing means for diffusing air from the lower surface side of the upper wall are provided. The air diffuser is connected to a water introduction pipe that branches from the discharge side of the submersible pump and introduces water discharged from the submersible pump, and a downstream end of the water introduction pipe disposed below the upper surface wall. It is assumed that the ejector is provided with an ejector for injecting introduced water, and an air introduction pipe having one end connected to the ejector and the other end opened to the atmosphere. In addition, the ejector is configured to suck and eject air through the air introduction pipe with the injection of the introduced water.

In the case of the above configuration, by operating the submersible pump, air is sucked from the atmosphere through the air introduction pipe along with the jet of water from the ejector, and the jet of water is injected with the air mixed therein. To the lower part of the upper surface wall. Then, this air passes through the through-hole in the upper wall and rises toward the purifying material, so that the air supplies oxygen to the aerobic microorganisms attached to the purifying material. Thereby, the growth of the aerobic microorganism is promoted, and the water purification action is maintained. Then, it is not necessary to install a special power other than the submersible pump in order to maintain the water purification action, and the maintenance of the water purification action can be performed efficiently and economically. .

According to a fifth aspect of the present invention, in the fourth aspect of the present invention, an intermittent air floating cylinder for intermittently discharging an air mass toward the lower surface of the upper surface wall of the mounting table is provided. The intermittent air floating cylinder is disposed at a position below the upper surface wall of the mounting base and in front of the ejector in the ejection direction so as to capture air ejected from the air diffuser. Things.

In the above configuration, a part of the air injected from the ejector is taken into the intermittent air floating cylinder, and the air is intermittently discharged as a mass of air toward the purifying material. The air mass shakes the purifying material to remove excessively adhered aerobic microorganisms, thereby preventing the aerobic microorganisms from concentrating on and adhering to the purifying material. Is more efficiently maintained.

According to a sixth aspect of the present invention, in the invention of the fourth aspect, the discharge side of the submersible pump is branched, and one of the branches protrudes above the water surface, and discharge water is discharged to the protruding downstream end. It is assumed that a sprinkling means for sprinkling water on the water surface is provided, and a water introduction pipe is connected to the other of the branches. One and the other of the branches are each provided with a flow rate adjusting means.

In the case of the above construction, while the opening of the flow control means provided on the water inlet pipe side is made small, the opening of the flow control means provided on the water sprinkling means side is made large. By doing so, it is possible to increase the amount of water spray while maintaining the amount of air diffusion at a relatively small amount. Also, while the opening degree of the flow rate adjusting means interposed on the water sprinkling means side is made small, the opening degree of the flow rate adjusting means interposed on the water introduction pipe side is made large so that the amount of water sprinkling can be compared. It becomes possible to increase the amount of diffused air while keeping the amount small. Further, by stopping the discharge of water to either the water introduction pipe side or the water sprinkling means side, it becomes possible to stop one of air diffusion and water sprinkling. In this way, it is possible to change and adjust the watering amount and the airing amount according to the state of the water area.

Further, the invention according to claim 7 is based on claim 1.
In the invention described in the above, it is assumed that a cleaning means for cleaning the purifying material in the purifying material unit with air is provided. And
An air discharge pipe that is disposed below the purifying material unit and discharges cleaning air toward the purifying material unit; an air supply source that supplies cleaning air to the air discharging pipe; Is provided.

In the case of the above structure, relatively strong air bubbles and the accompanying backflow water are blown from the air discharge pipe to the purifying material, so that mud clogged between the purifying materials is washed away. Thereby, the water purifying action of the purifying material is restored, and the life of the purifying material unit can be extended.

[0020]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a water purification apparatus according to an embodiment of the present invention, 1 is a pump housing in which a submersible pump 2 is housed, 3 is a floating means, 4 is a mounting table, and 5 is this mounting table. , 6 is a water collecting pipe, 7 is a diffuser, and 10 is a washing means. This water purification device is installed mainly in a closed water area 8 such as a natural pond or an artificial pond. Hereinafter, each component will be described in detail.

The pump housing 1 is composed of a box-shaped main body box 11 and a lid 12 which is placed on the upper opening of the main body box 11 and closes the upper opening, whereby the pump housing 1 is closed inside. A space is formed. A submersible pump 2 is fixed to a bottom surface inside the main body box 11, and a suction port 21 of the submersible pump 2 is disposed so as to open to the closed space. And a discharge pipe 23 for aeration. The water discharge pipe 22 has a downstream end provided through a flow control valve 24 serving as a flow control means and penetrating the lid 12 toward the atmosphere outside the pump housing 1. A sprinkling means 25 having an inverted conical shape is attached to the opening of. On the other hand, the diffuser discharge pipe 23 is connected to the upstream end of a water introduction pipe 71 constituting the diffuser 7 via a flow control valve 26.

The floating means 3 includes a float member 31, weights 32, 32, and chains 33, 33 for suspending and supporting the weights 32 so that they can be engaged and disengaged. The float member 31 is attached to an upper portion of the outer surface of the main body box 11 so as to surround the main body box 11. Then, the chains 33, 33 are connected to the hooks 34, 3 attached to the float member 31 and the water discharge pipe 22.
In a state where the weights 32 are suspended from the pump housing 1 in a suspended state,
The pump housing 1 enters a submerged state (a state shown in FIG. 1) in which the lid 12 is submerged below the water surface 81 and cannot be seen from above the water surface. In a state where the chains 33, 33 are removed from the hooks 34, 34,... For the chains and the weights 32, 32 are settled on the bottom of the water, the lid 12 of the pump housing protrudes above the water surface 61. State (the state shown in FIG. 4).

The mounting table 4 has a substantially horizontal rectangular upper surface wall 41 formed of a wall material having a large number of through holes such as punching metal, and a lower end which is respectively suspended from four corners of the upper surface wall 41. Are fixed to the water bottom 82 by the legs 42, 4
2, ...

The purifying material unit 5 includes a large number of charcoal 51 as a granular, rod-like or flaky porous purifying material, and a wire mesh or the like which holds the charcoal 51 in a dispersed state and allows water to easily pass therethrough. And a bag-shaped or box-shaped container 52 made of a porous material such as a mesh material or a punching metal. The purifying material unit 5 includes:
It is mounted on the upper wall 41 of the mounting table and is disposed near the water bottom. Further, hooks 53, 53 are attached at appropriate places on the upper part of the storage container 52. Then, one ends of the connecting ropes 54, 54 are connected to the hooks 53, 53,
Buoys 55, 55 for position confirmation floating on the water surface 81 at the other end
The buoys 55 and 55 are visually recognized, so that the purifying material unit 5 can be viewed from above the water surface.
You can check the position of.

The water collecting pipe 6 includes water collecting pipes 61, 61,
It is composed of a connection pipe 62 and a communication pipe 63. The water collecting pipes 61, 61 are closed at their ends, and are formed with a large number of water collecting holes penetrating the front end wall and peripheral wall of the water collecting pipes 61 such that water can easily pass therethrough and the charcoal 51 does not pass therethrough. The water collecting pipes 61 may be formed of, for example, a cylindrical pipe made of vinyl chloride. As shown in FIG. 2, the water collecting pipes 61 are inserted from the side wall of the purifying material unit 5 toward the inside, and the front ends of the water collecting pipes 61 are attached to the mounting plate 6.
The position is fixed by 4,64. On the other hand, the base ends of the water collecting pipes 61, 61 are connected to connecting pipes 62, respectively. The connecting pipe 62 and the pump housing 1 are flexible, for example, a communicating pipe 63 formed of a rubber hose. Connected by

The air diffuser 7 is provided with the air discharge pipe 23.
, A flexible water inlet pipe 71 connected to the ejector 72, an ejector 72 for injecting introduced water, and an air inlet pipe 73 for introducing air to the ejector 72. The ejector 72 is attached at a lower position near a corner of the upper surface wall 41 so that its discharge direction is parallel to the upper surface wall 41 of the mounting table and diagonal to the bottom surface of the purifying material unit 5. (See FIG. 2). And
The ejector 72 has a lower end 7 of the air introduction pipe 73.
3a is communicated with the upper end 73 of the air introduction pipe 73.
b is supported by an air introduction pipe float member 74 so as to extend upward and communicate on the water surface 81 with the atmosphere. The ejector 72 sucks air from the atmosphere through the air introduction pipe 73 by the action of the jet water flow inside the ejector 72, and jets water with the air mixed therein.

A plurality of intermittent air floating cylinders 9, 9,...
Is located on the lower surface side of the upper surface wall 41 and is located above and in front of the ejecting direction of the ejector 72, and water mixed with air ejected from the ejector 72 is discharged from below each of the intermittent air floating cylinders 9. I am going to receive it.
The intermittent air floating cylinder 9 is, as shown in detail in FIG.
A lower cylinder 91 having an upper end opened and a lower end closed, and a bell-shaped accumulator cylinder 92 having upper and side surfaces closed and a lower end opened sufficiently larger than the outer diameter of the lower cylinder 91 and having a predetermined volume inside.
And a fumarolic tube 93 having upper and lower ends open and having a relatively small outer diameter. Then, the storage cylinder 92 is fixed so as to cover the lower cylinder 91 from above, and the blast tube 93 is penetrated from above the storage cylinder 92 and inserted and fixed to a predetermined position in the lower cylinder 91. . The relative distance between the upper end opening of the lower cylinder 91 and the inner surface of the top of the storage cylinder 92 is set to a predetermined dimension. As a result, the air discharged from the ejector 7 is stored in the storage cylinder 92.
When the air pool exceeds the lower end opening position of the bleeding cylinder 93, it flows from the bleeding cylinder 93 toward the upper surface wall 41 at once. It has become.

Further, the cleaning means 10 includes an air discharge pipe 101, a compressor 102 as an air supply source,
An air supply pipe 103 is provided. The air discharge pipe 101 is formed by opening a large number of air discharge holes of a predetermined diameter mainly on a peripheral wall on an upper surface side of one or a plurality of cylindrical pipes made of, for example, vinyl chloride having both ends closed. . The air discharge pipe 101 is attached to a lower portion of the mounting table 4 and is connected to the compressor 102 via the air supply pipe 103. The compressor 102 supplies relatively high-pressure air for washing mud and the like clogged between the charcoal 51 as the purifying material to the air discharge pipe 101.

Next, the operation and effect of the above embodiment will be described.

In the case of the present water purification apparatus, the pump housing 1 is submerged in a normal use state in which the submersible pump 2 is operated to perform water purification, while the submersible pump 2 is maintained, inspected, repaired, or replaced. When the maintenance work such as the above is performed, it is brought into a floating state. That is, the pump housing 1 is in a state of being filled with water except for an air portion above the enclosed space inside the pump housing 1.
2 and 32 are suspended from the pump housing 1, the balance between the buoyancy between the air portion in the closed space and the float member 31 and the gravitational force of the weights 32, 32. The water spraying means 25 is left on the water surface 81 and the pump housing lid 12 is
It will be submerged below and will not be visible from above the water surface (see FIG. 1). Thus, in a normal use state in which normal water purification is performed, water purification can be performed without impairing the beauty of the water area. Then, the chains 33, 33 are removed from the chain hooks 34, 34,.
As shown in FIG. 7, when the pump housing is dropped on the water bottom 82, the air level in the closed space and the buoyancy of the float member 13 cause the water level in the closed space in the pump housing and the water level in the closed water area 8 to become the same. 1 rises, and the lid 12 of the pump housing is in a floating state protruding above the water surface 61. Accordingly, when performing the maintenance work of the submersible pump 2, the water surface 8 can be maintained without performing the submersible work.
1, the maintenance work can be performed reliably. However, FIG. 4 shows a state in which the chains 33, 33 are hooked on the hooks 34, 34,... So as not to fall into the water.

In the above-mentioned normal use state, by operating the submersible pump 2, the water in the closed water area 8 passes between the many charcoals 51, 51,. The water is sucked into the suction port 21 in the pump housing 1 through 6, and this water is discharged to the water surface 81 by the watering means 25 through the watering discharge pipe 22 and returned. And the water is the charcoal 5
When the water passes between 1, 51,..., The water is purified by the aerobic microorganisms that propagate on the charcoal 51, and the purified water is returned to the water area 8 from the water discharge pipe 22 of the submersible pump 2. This is repeated to keep the water in the closed water area 8 at a constant water quality. In addition, the upstream end of the discharge pipe 22
, And the purified water from the discharge pipe 22 is sprinkled by the sprinkling means 25, so that the water area 8 is replenished with oxygen and the amount of dissolved oxygen can be increased.

When water is discharged from the ejector 72 connected to the discharge pipe 23 for aeration, air is sucked through the air introduction pipe 73 with the discharge of the water, and the water is mixed with the air. Is discharged. Then, this air rises and is supplied to the charcoal 51 of the purifying material unit 5 through each through hole of the upper surface wall 41. Oxygen is replenished by the supply air to maintain and promote the growth of aerobic microorganisms breeding on charcoal. As a result, the water can be purified by the microorganisms. Since this air diffusion uses the discharge flow of the submersible pump 2, no special power other than the submersible pump 2 is required, and the above-mentioned water purification action can be maintained efficiently and economically. Can be.

Further, a part of the air discharged from the ejector 72 flows into the inside from the lower end opening of the storage cylinder 92 of each intermittent air floating cylinder 9, and this air is stored in the upper part of the storage cylinder 92. Become. Then, the volume of air in the storage cylinder 92 increases and air also flows into the lower cylinder 91, and the boundary surface between the air and water in the lower cylinder 91
, The air starts to rise from the fumarolic tube 93. At this time, the air that has accumulated in the lower cylinder 91 and the accumulation cylinder 92 is sucked out by the rising buoyancy of the air, and becomes a lump of air from the blast tube 93 and rises at a stretch toward the purifying material unit 5. Due to this air mass, the charcoal 51 is shaken, and the aerobic microorganisms that have excessively propagated on the surface thereof are peeled off. As a result, it is possible to prevent the aerobic microorganisms from concentrating and adhering to a part of the charcoal surface. ,
Water purifying action can be maintained.

When it is desired to supply a large amount of air to the charcoal 51 or to suppress water spray on the water surface at night or when the wind is strong, the flow control valve 24 attached to the water discharge pipe 22 is provided. While the closed state or opening is set to small opening,
By setting the opening of the flow control valve 26 attached to the discharge pipe for aeration to a large opening, it is possible to perform the aeration while keeping the amount of water sprayed to zero or a relatively small amount. On the other hand, the ejector 72
In the case where the bubbles discharged from the water rise to the surface of the water, for example, impair the aesthetics of the water area, the flow control valve 26 is closed or the opening is small enough to make the air bubbles inconspicuous. Sprinkling can be performed while reducing the amount of air diffusion to zero or a relatively small amount by setting the opening to a large opening. This makes it possible to change and adjust the amount of oxygen supply to an appropriate amount according to the state of the purifying material, while changing and adjusting the amount of water spray according to the environmental conditions of the water area.

The compressor 102 of the cleaning means 10
, Relatively high-pressure air bubbles are blown upward from the air discharge pipe 101. Then, the blown air bubbles and the backflow water caused by the blowing of the air bubbles collide with the charcoal 51, so that mud or the like clogged between the charcoals 41 can be washed away. Thereby, the water purifying action of the purifying material is restored, and the life of the purifying material unit can be extended. It should be noted that if the backflow cleaning by the intermittent air floating cylinder is performed appropriately, the cleaning of the charcoal 51 using the compressor 102 does not need to be performed frequently, and may be performed, for example, about once a year.

Further, since the pump housing 1 and the purifying material unit 5 are connected by the flexible communication pipe 63 and the water introducing pipe 71, the pump housing 1 and the purifying material unit 5 are respectively connected. It can be placed at any position.

<Other Embodiments> The present invention is not limited to the above embodiments, but includes various other embodiments. That is, in the above embodiment,
Although one purifying material unit 5 is connected to the pump housing 1, the present invention is not limited to this, and a plurality of purifying material units may be connected according to the performance of the submersible pump 2.

In the above embodiment, the discharge flow rate is adjusted by interposing the flow control valves 24 and 26 in the discharge pipes 22 and 23 on the discharge side of the submersible pump. However, the present invention is not limited to this. The switching valve may be simply provided.

[0040]

As described above, according to the water purifying apparatus of the first aspect of the present invention, maintenance work such as maintenance and inspection, repair or replacement of the submersible work pump can be performed.
It can be performed easily and reliably on the water surface without draining the water in which the present water purification device is installed, and without performing underwater work.

According to the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, the pump housing can be switched between a submerged state and a floating state according to the situation. The water can be purified without deteriorating the beauty of the water area.

According to the third aspect of the present invention, in addition to the effect of the first aspect of the present invention, when water is sprinkled, aeration is performed, thereby supplying oxygen to the water. As a result, the amount of dissolved oxygen in the water area can be increased.

According to the fourth aspect of the invention, in addition to the effect of the first aspect of the invention, oxygen is supplied by air discharged from the ejector without using power other than the submersible pump. As a result of promoting the growth of the aerial microorganism, the water purification action of the microorganism can be efficiently maintained.

According to the fifth aspect of the invention, in addition to the effect of the fourth aspect of the invention, the air discharged from the ejector is intermittently purified as an air mass without using power other than the submersible pump. Can be discharged onto the material, and the air mass shakes the purifying material, preventing the aerobic microorganisms in the purifying material from concentrating and adhering to a part of the purifying material, thereby efficiently maintaining the water purifying action. Can be.

According to the sixth aspect of the present invention, in addition to the effects of the fourth aspect of the present invention, the amount of water spray is changed and adjusted according to the environmental conditions of the water area, while the amount of water is adjusted according to the state of the purifying material. The oxygen supply amount can be changed and adjusted to an appropriate amount.

According to the seventh aspect of the present invention, in addition to the effect of the first aspect of the present invention, relatively strong air bubbles and accompanying backflow water are sprayed on the purifying material, so that the purifying material is clogged between the purifying materials. Mud and the like can be washed away. Thereby, the water purifying action of the purifying material is restored, and the life of the purifying material unit can be extended.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is an explanatory plan view showing a purifying material unit, a mounting table, a water collecting pipe, and an ejector.

FIG. 3 is a sectional view showing an intermittent air floating cylinder.

FIG. 4 is a view corresponding to FIG. 1, showing a partially omitted floating state of the pump housing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pump housing 2 Submersible pump 3 Floating means 4 Mounting stand 5 Purifying material unit 6 Water collecting pipe 7 Air diffusing means 9 Intermittent air floating cylinder 10 Cleaning means 21 Suction port (suction side) 22 Discharge pipe for sprinkling (discharge side) 23 Discharge pipe (discharge side) for air diffusion 24, 26 Flow control valve (flow control means) 25 Water spray means 31 Float member 32 Weight 41 Top wall 51 Charcoal (porous purifying material) 52 Storage container 71 Water introduction pipe 72 Ejector 73 air introduction pipe 81 water surface 101 air discharge pipe 102 compressor (air supply source)

Claims (7)

[Claims] 1. A pump housing in which a submersible pump is housed, floating means having a float member coupled to the pump housing and holding the pump housing floating on the water surface, granular or flake-shaped. A purifying material unit which is arranged in a storage container having a mesh-like or porous outer wall and is disposed underwater, and a purifying material of the purifying material unit at an upstream end side. And a water collecting pipe disposed so that a downstream end thereof communicates with a suction side of the submersible pump. 2. The floating means according to claim 1, wherein the floating means comprises a weight which is suspended and supported so as to be able to be disengaged, and the upper surface of the pump housing is located at a position near the water surface by engaging and disengaging the weight. A water purifying apparatus, wherein the position of the water purifying apparatus can be changed between a submerged state that is submerged and a floating state that protrudes upward from the water surface. 3. The water purification system according to claim 1, wherein a discharge side of the submersible pump is protruded above the water surface, and a sprinkling means for sprinkling the discharge water on the water surface is provided at the protruding downstream end. apparatus. 4. The apparatus according to claim 1, further comprising an upper surface wall disposed on the water bottom and on which the purifying material unit is mounted, wherein the upper surface wall is formed by a wall material having a large number of through holes vertically penetrating therethrough. And a diffuser for diffusing air from the lower surface side of the upper surface wall, wherein the diffuser diverges from the discharge side of the submersible pump and discharges water from the submersible pump. A water introduction pipe to be introduced, an ejector disposed below the upper surface wall and connected to a downstream end of the water introduction pipe to inject introduced water, one end connected to the ejector and the other end opened to the atmosphere. A water purifying apparatus, wherein the ejector is configured to suck and eject air through the air introducing pipe when the introduced water is ejected. 5. The intermittent air floating cylinder according to claim 4, further comprising an intermittent air floating cylinder for intermittently discharging an air mass toward a lower surface of an upper surface wall of the mounting table. The water purifier is provided at a position below the upper surface wall of the mounting base and in an upper position in front of the ejecting direction of the ejector so as to capture air. 6. The submersible pump according to claim 4, wherein a discharge side of the submersible pump is branched, one of which is protruded above the water surface, and a sprinkling means for sprinkling the discharged water on the water surface is provided at the protruding downstream end. A water purification device, wherein a water introduction pipe is connected to the other of the branches, and a flow rate adjusting means is interposed in each of the one and the other of the branches. 7. The cleaning material unit according to claim 1, further comprising a cleaning unit that cleans the cleaning material in the cleaning material unit with air, wherein the cleaning unit is disposed below the cleaning material unit and directed toward the cleaning material unit. A water purification apparatus comprising: an air discharge pipe for discharging cleaning air; and an air supply source for supplying cleaning air to the air discharge pipe.