JPH06277696A - Intermittent type water quality improving device - Google Patents

Abstract

PURPOSE:To provide the superior agitating effect to water masses in a deep layer by filling the water of water masses remaining on a surface layer in the vicinity of water level into a closed tank by means of a boosting feed pump, opening an on-off means intermittently and discharging the water into the downward flow by means of the pressure in the tank. CONSTITUTION:An intermittent type water quality improving device 1 is disposed on a lake 14 in the floating state by the buoyancy of a float 9, and first a boosting feed pump 4 is driven in the state of blocking first and second valves 6 and 12, and water of water masses of comparatively high temperature remaining on a surface layer in the vicinity of water level is filled into a closed tank 2 through a suction pipe 7 and a water feed pipe 8, and the pressure inside the tank 2 is retained properly. Then the first on-off valve 6 is opened intermittently at the given time intervals, and the water in the tank 2 is discharged at a time from a jetting port 5 into a downward flow path pipe 3 by the inner- tank pressure (pneumatic pressure). The similar operation is repeated to circulate the water masses in the surface layer to the proper underwater depth successively and remove the water masses by feeding water bloom or the like to the deep layer for the purpose of improving the water quality.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intermittent water quality improving device for improving the water quality of a deep pond, a lake or the like.

[0002]

2. Description of the Related Art Conventionally, in deep ponds, lakes, etc., a water mass with a high water temperature forms a layer in the surface layer near the water surface due to temperature stratification, and water quality such as water-bloom is generated as a water source. There was a problem of decline. For this reason, the lake water artificial circulation method is being used to improve the water quality of ponds and lakes. The artificial lake circulation method uses a pipe with an appropriate depth in the lake water to form an upward flow path, and the air lift action of the air blown into the lower end of the pipe creates an upward flow in the pipe, causing water to accumulate in the deep layer. By circulating the water mass in the surface layer near the water surface, the water mass in the surface layer was mixed with the water mass in the deep layer to suppress the generation of water-blooms and the like.

Air is blown into the pipe intermittently, and an appropriate amount of air mass accumulated by a compressor is discharged at one time.

[0004]

However, in the above-mentioned conventional structure, the deep water mass is circulated to the surface layer by the upward flow, and the surface water mass having a high water temperature is not circulated to the deep layer. It was difficult. Also, since a tank for storing air is installed at the lower end of the pipe, and air is sent by a compressor placed above the water to this tank, the structure at the lower end of the pipe located in deep water becomes complicated. However, there was a problem that maintenance and the like took time and effort.

SUMMARY OF THE INVENTION The present invention is intended to solve the above problems, and an object thereof is to provide an intermittent water quality improving device which simplifies the structure of equipment located underwater and which does not require a compressor.

[0006]

In order to solve the above-mentioned problems, an intermittent water quality improving device of the present invention is a closed tank having a jet port which is arranged near the water surface and opens downward.
First opening / closing means for opening / closing the jet port of the closed tank, a downward flow pipe whose upper end side is loosely fitted to the jet port of the closed tank, and a lower end opening is opened at an appropriate water depth, and a water surface in the closed tank. It is configured to include a pressure pump that press-fits water of a water mass that accumulates in the surface layer in the vicinity through a water supply pipe.

Further, the closed tank is formed in a cylindrical shape, a jet port is provided at the center of the bottom of the closed tank, and the opening of the water supply pipe in the closed tank is formed in the tangential direction of the inner peripheral surface of the tank. It is configured.

Further, the construction is such that a float supporting the closed tank and the downward flow pipe is provided. Also,
The downward flow passage tube is composed of a telescopic tube.

Further, a structure is provided in which a water jet pipe having one end opened inside the hermetically sealed tank and the other end located outside the hermetically sealed tank is provided at the other end of the water jet pipe via a second opening / closing means. It is what

[0010]

With the above-described structure, with the first opening / closing means closed, the water of the water mass staying in the surface layer near the water surface is filled into the closed tank by the pressure feed pump through the water supply pipe, and the inside of the closed tank is properly opened. Keep at pressure. Then, the first opening / closing means is intermittently opened after a certain period of time, and when the first opening / closing means is closed, the water retained in the hermetically-sealed tank is discharged from the ejection port into the downward flow passage pipe at once by the pressure in the tank. discharge. The pressure water released into the downward flow tube becomes a downward flow and drops,
Water already in the downward flow pipe is pushed out through the lower end opening to an appropriate depth.

Therefore, the intermittent opening / closing operation of the first opening / closing means allows the water mass in the surface layer near the water surface to be circulated sequentially through the closed tank and the downward passage pipe to an appropriate water depth. In addition, the surface water pushed out from the downward flow tube stirs the surrounding deep water mass, and because the water temperature is higher and the specific gravity is lighter than the deep water, the deep water mass is entrained while flowing upward. And circulate to the surface side.

For this reason, in the conventional case, the one-way flow from the deep layer to the surface layer causes water to circulate with high efficiency between the surface layer and the deep layer, thereby preventing the formation of temperature stratification. Prevention of deterioration of water quality or improvement of water quality is achieved. Further, since the pressure in the closed tank is under an appropriate pressure, the air in the tank is efficiently dissolved in water, and the effect of deep aeration is achieved.

The water filled in the closed tank from the water supply pipe is ejected in the tangential direction of the inner peripheral surface of the tank to generate a swirling flow in the closed tank. This swirling flow has a high flow velocity when it passes through the jet port and the flow passage of the first opening / closing means, so that the flow velocity is increased, and the swirling flow also descends as a swirling flow in the downward flow passage pipe.

For this reason, the water in the downward flow tube also becomes a swirling flow and is jetted out from the lower end opening to the periphery to enhance the stirring effect on the deep water mass. Since the closed tank and the downward flow pipe are supported by the float and are in a floating state, by moving them to an arbitrary position, for example, a point where a lot of water-bloom and so on are particularly generated, the water-bloom and the like are sent to the deep layer directly. Can be removed to improve the water quality.

Since the downward flow passage tube is composed of an expandable tube, the downward flow passage tube can be easily moved without being disturbed by the undulation of the water bottom by contracting the downward flow passage tube. When the closed tank is filled with water under an appropriate pressure, the second opening / closing means is intermittently opened after a certain period of time, and the water accumulated in the closed tank when the second opening / closing means is closed is stored in the tank. It is sprayed upward from the fountain nozzle by the pressure of, and improves the aesthetics of the landscape.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 3, the intermittent water quality improvement device 1 is arranged near the surface of water such as lake water, and has a closed tank 2, a downward flow pipe 3 and a pressure pump 4 as main components.

The closed tank 2 is located near the water surface, and the lower side portion thereof is submerged and the upper side portion is exposed above the water surface. The hermetically sealed tank 2 has a cylindrical ejection port 5 that opens downward at the center of the bottom, and an electromagnetic or manual first on-off valve 6 is provided at the ejection port 5 as an opening / closing means. However, the opening / closing means is not limited to the valve device.

The downward flow pipe 3 has a closed tank 2 at its upper end.
Is vertically fixed and loosely fitted to the ejection port 5 on the upper end side. The downward flow passage pipe 3 has an appropriate length, and the lower end thereof has an opening 3a at an appropriate water depth, and the opening 3a has a smaller diameter than the flow passage of the downward flow passage pipe 3. The size of the opening 3a is not limited to that shown in FIG. 3, and the lower end of the downward flow passage tube 3 may be fully opened. Further, the downward flow passage pipe 3 can be formed by a bellows pipe that can expand and contract.

The pressure feed pump 4 is fixed on the top plate of the hermetically sealed tank 2, and the suction pipe 7 communicating with the suction side of the pressure feed pump 4 opens at the surface layer near the water surface and is provided on the discharge side of the pressure feed pump 4. The communicating water pipe 8 is open in the closed tank 2. An underwater pump may be used instead of the pressure pump 4. The opening 8a of the water supply pipe 8 in the closed tank faces the tangential direction of the inner circumferential surface of the tank to form a swirling flow in the closed tank 2. As a means for forming the swirling flow, it is also conceivable to direct the jet port 5 in the tangential direction of the inner peripheral surface of the downward flow passage tube 3.

The closed tank 2 is provided around the closed tank 2.
Also, a float 9 is provided to maintain the downward flow tube 3 in a floating state. Further, the closed tank 2 is provided with a water jet pipe 10, one end of which is opened into the closed tank 2 and the other end of which is opened and closed by a fountain nozzle 11 which is provided outside the closed tank 2. It communicates through the valve 12. Further, the closed tank 2 is provided with an intake / exhaust valve 13 if necessary.

The operation of the above structure will be described below.
Due to the buoyancy of the float 9, the intermittent water quality improvement device 1 is placed floating on the lake water 14. With the first opening / closing valve 6 and the second opening / closing valve 12 closed, the water of the water mass staying in the surface layer near the water surface is filled into the sealed tank 2 by the pressure feed pump 4 through the suction pipe 7 and the water supply pipe 8 and sealed. The inside of the formula tank 2 is maintained at an appropriate pressure. At this time, the water supply pipe 8
The water to be filled into the sealed tank 2 from the above jets in the tangential direction of the inner circumferential surface of the tank, and causes a swirl flow in the sealed tank 2.

Then, the first opening / closing valve 6 is opened intermittently after a certain period of time, and the water retained in the hermetically sealed tank 2 when the first opening / closing valve 6 is closed is discharged by the tank pressure (air pressure) into the jet port 5. To the downward flow tube 3 at once.
The swirling flow in the closed tank 2 is increased in flow velocity due to the narrowing of the flow passage when passing through the flow passage of the ejection port 5 and the first opening / closing valve 6, and the swirling flow in the downward flow passage pipe 3 is also changed. Then, the water that was already inside the downward flow pipe 3 is pushed out through the opening 3a at the lower end to an appropriate depth below the water depth. At this time,
The water in the downward flow pipe 3 also becomes a swirling flow and is jetted to the surroundings from the opening 3a at the lower end to enhance the stirring effect on the deep water mass. Moreover, since the flow path in the opening 3a has a smaller diameter than the flow path of the downward flow path pipe 3, the flow velocity of the swirling flow is increased at the time of ejection, and the stirring / diffusion effect is promoted. The water in the downward flow tube 3 may be discharged to the outside without giving the swirling flow.
Further, the water may be released gradually over a period of time.

Therefore, due to the intermittent opening / closing operation of the first opening / closing valve 6, the water mass on the surface layer near the water surface circulates through the closed tank 2 and the downward flow pipe 3 in sequence to an appropriate depth. Further, the surface water extruded from the downward flow pipe 3 diffuses into the surrounding deep water mass and agitates the water mass, and since the water temperature is higher and the specific gravity is lighter than the deep water, While entraining the water mass, it becomes an upward flow and circulates to the surface side.

Therefore, water circulates between the surface layer and the deep layer with high efficiency, and formation of temperature stratification can be prevented to prevent deterioration of water quality or improve water quality. Furthermore, since the inside of the closed tank 2 is under an appropriate pressure, the air in the tank is efficiently dissolved in water, and the effect of deep layer aeration is achieved.

Further, since the water in the hermetically sealed tank 2 is intermittently discharged, it suffices to supply water to the hermetically sealed tank 2 with a small flow rate and high pressure. It can be used, and the power cost is low. In addition, the intermittent water quality improvement device 1 is in a floating state with the closed tank 2 and the downward flow passage pipe 3 supported by the float 9, so that an arbitrary position, for example, a place where a lot of water-bloom and the like occur particularly. It is possible to transfer water to the deeper layers and to feed water-bloom and the like into the deeper layers to reduce photosynthesis due to insufficient light and suppress fertility to improve water quality.

When the downward flow passage pipe 3 is formed of a bellows pipe or the like, the downward flow passage pipe 3 is contracted during movement so that the downward flow passage pipe 3 can be easily moved without being hindered by ups and downs of the water bottom. You can

Then, in a state where the sealed tank 2 is filled with water under an appropriate pressure, the second opening / closing valve 12 is set to the first opening / closing valve 12.
To open the valve intermittently alternately with the open / close valve 6 and to inject the water retained in the closed tank 2 when the valve is closed upward through the water jet pipe 10 through the water jet nozzle 11 by the pressure in the tank to improve the aesthetics of the landscape. You can At this time, since the upper end side of the intermittent water quality improvement device 1 is only exposed on the water surface, the device itself does not spoil the appearance. In addition, this device can be completely immersed in the water surface by adjusting the float.

[0028]

As described above, according to the present invention, the water mass in the surface layer near the water surface is sequentially circulated under the proper depth through the closed tank and the downward flow pipe, and is pushed out from the downward flow pipe. The water on the surface layer stirs the surrounding deep water bodies and circulates to the surface side as an upward flow while entraining the deep water bodies, so that the water is circulated between the surface and deep layers with high efficiency. It is possible to prevent deterioration of water quality or improve water quality. Further, the air in the tank is efficiently dissolved in water, and the effect of deep layer aeration can be obtained.

Further, the water descending through the downward flow passage tube becomes a swirling flow and is jetted to the periphery from the lower end opening, whereby the stirring effect given to the deep water mass can be enhanced, and the apparatus is supported by the float. Since it is in a floating state, it can be moved to any position. Further, the water accumulated in the closed tank is jetted upward from the water jet nozzle by the pressure in the tank, so that the aesthetics of the landscape can be improved.

[Brief description of drawings]

FIG. 1 is an overall cross-sectional view of an intermittent water quality improving device according to an embodiment of the present invention.

FIG. 2 is a view on arrow AA of FIG.

FIG. 3 is an enlarged view of part B in FIG.

[Explanation of symbols]

 1 Intermittent Water Quality Improvement Device 2 Closed Tank 3 Downward Flow Tube 4 Water Supply Pump 5 Jet Port 6 First Open / Close Valve 8 Water Supply Pipe 9 Float 10 Water Jet Pipe 11 Fountain Nozzle 12 Second Open / Close Valve

Claims (5)

[Claims] 1. A closed tank having a jet port arranged near the water surface and opening downward, a first opening / closing means for opening and closing the jet port of the closed tank, and an upper end side of the jet port of the closed tank having a play. It was equipped with a downward flow path pipe that fits and the lower end opening opens to an appropriate depth of water, and a pressure pump that press-fits the water of the water mass that accumulates in the surface layer near the water surface in the closed tank through the water supply pipe. An intermittent type water quality improving device. 2. The closed tank is formed in a cylindrical shape, a jet port is provided at the center of the bottom of the closed tank, and the opening of the water supply pipe in the closed tank is formed in the tangential direction of the inner peripheral surface of the tank. The intermittent water quality improving device according to claim 1, wherein 3. The intermittent water quality improving device according to claim 1 or 2, further comprising a float for supporting the closed tank and the downward flow passage pipe. 4. The intermittent water quality improvement device according to claim 1, wherein the downward flow pipe is made of a telescopic pipe. 5. A water injection pipe having one end opened inside the closed tank and the other end located outside the closed tank, and a water jet nozzle provided at the other end of the water injection pipe through a second opening / closing means. The intermittent water quality improving device according to any one of claims 1, 2, 3, and 4.