JPS638474Y2 - - Google Patents

Description

[Detailed explanation of the invention] Recently, industrial wastewater, sewage discharge water, human waste, household water, etc. have been flowing into public water bodies such as ports, lakes, reservoirs, and rivers at a rapid rate, exceeding the limit of self-purification, resulting in pollution. , eutrophication is progressing and water quality is rapidly deteriorating. In water bodies that have been subject to water pollution for many years, pollutants accumulate in the bottom layer, consuming a large amount of oxygen for decomposition, and as a result, the bottom layer water becomes anoxic, resulting in anaerobic decomposition. This causes secondary water pollution, and iron, manganese, etc. are also leached out, resulting in extremely poor water quality. This is extremely important not only from the standpoint of environmental hygiene, but also from the standpoint of maintaining the quality of water resources and the growth of fish.

Various methods have been proposed to purify this polluted water, but the most economical and effective method is to create convection from the bottom of the water to the water surface and to remove the cline formed near the water surface. destroy the water and facilitate the movement and circulation of bottom water and surface water,
The purpose of this method is to raise the putrid and polluted water that has accumulated at the bottom of the water to the surface of the water, bring it into contact with the atmosphere, and re-oxidize it to promote natural purification.

The present invention relates to an improvement of an air supply method for a water pumping device that can most effectively and appropriately carry out the above-mentioned functions. Conventional equipment has a hollow cylindrical body that can be installed on the bottom of the water in an upright position, with a partition wall with an injection port in the center installed at the bottom of the body, an air storage chamber below the partition wall, and compressed air is supplied to this storage chamber. The accumulated air is intermittently injected into the hollow cylinder through the injection port by a reverse siphon effect, and the buoyancy of the air causes the sewage inside the cylinder to rise, thereby purifying the sewage. As is known from Japanese Utility Model Publication No. 55-12960, the air used in these devices is either a compressor,
Or it is supplied from a blower, etc., which causes noise when using compressors, blowers, etc., and vinyl hoses due to waves and rapids during strong winds, etc.
Shaking of the air supply piping system such as vinyl pipes and rubber hoses,
There were many accidents such as washing away and damage. The present invention aims to eliminate the above drawbacks.

That is, a floating chamber is provided at the upper end of a hollow cylinder whose upper and lower ends are open, a weight is connected to the lower end so that the cylinder stands naturally upright in water, and a floating chamber is provided at the lower part of this hollow cylinder with an inverted center part. A partition wall with a stop valve is provided to divide the inside of the cylinder into two parts, and the lower part of the partition wall is used as an air storage chamber.
Several water intake ports are provided on the side wall of the cylinder above the bulkhead near the bulkhead, and a single suction type impeller for the pump is attached to the rotating shaft of the submersible motor on the wall of the air storage chamber, with the impeller positioned slightly below the bottom end of the cylinder. The submersible motor was fixed in place, and the dirty water in the air storage chamber was sucked in and discharged outside the cylinder, and an intake pipe system with a check valve inserted between the air storage chamber and the atmosphere was installed. On the other hand, the rotation and stop of the submersible motor are automatically controlled. When the submersible motor rotates, the check valve in the center of the bulkhead closes, and the check valve in the intake pipe system opens to drain the sewage in the air storage chamber. The air is sucked and accumulated through the intake pipe system due to the negative pressure after discharge, and when the engine is stopped, the action of the check valve is reversed, the check valve in the intake pipe system is closed, and the check valve in the center of the bulkhead is closed. When it opens, the accumulated air is injected into the hollow cylinder through the check valve in the center of the partition wall due to its buoyant force, and at this time, the piston action that causes the air to rise inside the cylinder sucks up a large amount of wastewater from the water intake port and purifies the water. An intermittent vacuum intake air pumping device featuring:

An embodiment of the present invention will be explained with reference to the drawings. In the drawings, 1 indicates the water surface of a lake, reservoir, etc., and 2 indicates the bottom surface of the water. In the present invention, the upper and lower ends of the hollow cylindrical body 3 are open, a floating chamber 4 in the form of a closed annular chamber is provided around the upper end, and a weight 6 is connected to the lower end surface via a wire 5.
are connected so that the hollow cylindrical body 3 naturally stands upright in water due to the buoyancy of the floating chamber 4 and the gravity of the weight 6. Next, a partitioning bulkhead 8 having a check valve 7 in the center near the lower end is provided inside this hollow cylinder 3 to divide the inside of the cylinder into two vertically, and the space inside the cylinder below the partition is an air storage chamber 9. do. Furthermore, a single suction type impeller 12 for a pump is fastened to the rotating shaft 11 of the submersible motor 10 in the air storage chamber 9 using a keyway, a nut, and a washer 13, and the submersible motor 10 is attached to the inner wall of the air storage chamber 9 by a motor support plate 14. , bolts and nuts 15 are used to install the impeller 12 so that it is located slightly below the lower end of the hollow cylindrical body, so that the waste water in the air storage chamber 9 is discharged outside the cylinder by the single-suction type impeller 12, and the partition wall Several water intake ports 16 are provided on the side wall of the hollow cylinder 3 above the partition wall 8, and the air storage chamber 9 is further provided with a check valve 1 midway.
A pressure-resistant air pipe 17 with a pipe 8 inserted therein communicates with the atmosphere. In the figure, 19 is a buoy, 20 is an installation rope, 21 is an electric wire for an underwater motor, 22 is an automatic open/close switch with a timer, and 23 is a switchboard.

To explain the action of the device of the present invention constructed as described above, as shown in Figure 8, this device is designed to provide the most effective convection action in lakes, rivers, ports, reservoirs, etc., taking into account the wind direction, water current, water depth, etc. If you select a place where they will act effectively and drop several pieces into the water at appropriate intervals, the weight 6 will automatically balance itself due to the buoyancy of the upper floating chamber 4 and the gravity of the weight 6 connected to the lower part, and the weight 6 will float to the bottom of the water. It is installed in an upright position in the water at the grounded position. At this time, the condition inside the hollow cylinder is as shown in FIG. 5, and the air storage chamber 9 is completely filled with dirty water. Next, when the submersible motor 10 is started and the single-suction type impeller 12 is rotated, the impeller sucks the dirty water in the air storage chamber 9 and discharges it to the surrounding area. When the check valve 18 inserted in the pressure-resistant air pipe 17 is closed and the check valve 18 inserted in the pressure-resistant air pipe 17 is placed in the open position, the pressure inside the air storage chamber 9 gradually becomes low because the waste water is discharged as shown in FIG. Atmospheric air is sucked and accumulated in the chamber 9 due to the pressure difference with the atmospheric pressure.

Next, use the automatic open/close switch 22 with a timer to determine when the maximum amount of air has accumulated in the air storage chamber 9. When the motor 10 is stopped, the action of the check valve will reverse the air accumulated in the air storage chamber 9. As a result, the gas is rapidly injected into the hollow cylinder 3 through the check valve 7, forming bubbles and floating up explosively. At this time, check valve 1
8, the accumulated air will not flow back into the pressure-resistant air pipe 17. At this time, the bubbles inside the hollow cylinder 3 act as if they were pistons, and their buoyancy causes the sewage inside the cylinder to be rapidly pumped up, and the negative pressure generated at this time sucks a large amount of sewage outside the cylinder through the water intake port 16. do.
Furthermore, the replenishment of wastewater into the air storage chamber 9 by air flotation is carried out by flowing backward through the gap between the lower end of the hollow cylinder 3 and the impeller 12 and inside the impeller 12 when it is stopped. A diagram of this action is shown in Fig. 7.

The number of air injections of this device is determined by the discharge amount of the impeller 12 depending on the water depth, and the time required for the waste water in the air storage chamber 9 to be discharged. All you have to do is control the rotation and stop of the. When the water depth is deep, it is necessary to increase the discharge pressure of the impeller accordingly, and the impeller structure in this case can be of any type, such as a centrifugal pump or an axial flow pump, and can be single-stage or multi-stage. The structure is free as long as it discharges the dirty water in the air storage chamber 9 out of the cylinder against water pressure according to the water depth.

The air mass that rapidly rises inside the hollow cylinder 3 acts as an air piston, and as it rises, the water pressure decreases, so the volume expands and is released from the cylinder 3 to the outside, together with a large amount of pumped sewage. It rises to the surface while causing strong convection in the surrounding water, and if a cline has formed in the surface water, it destroys this layer and creates a water column of bubbles on the water surface, which then collapses. This action is repeated each time the air storage chamber 9 is filled with intake air, so if a suitable number of this device is installed in relatively deep places such as lakes, reservoirs, rivers, ports, etc., as shown in Figure 8, It is possible to apply a large convection effect to the entire water body as shown by the arrow, circulate the upper layer water and the bottom layer water, and raise the putrid and polluted water stagnant at the bottom of the water to the water surface and reoxidize it, promoting self-purification. be.

In this embodiment, the rotation of the underwater motor is stopped by an automatic open/close switch with a timer, but the level switch may also be controlled by the surface position of the air in the air storage chamber.

As mentioned above, the present invention has an extremely simple structure, does not require an air supply device such as a compressor, and is relatively small and requires little power to achieve great effects in preserving and improving water quality, so it has an extremely large industrial effect. be.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a sectional view taken along line A-A in Fig. 1, and Fig. 4 is a vertical and horizontal sectional view of the impeller shown in Fig. 1. , Figures 5 to 7
The figure is an explanatory diagram of the operation, and FIG. 8 is an explanatory diagram of the operation showing the state in which this device is installed on the bottom of the water. 1... Water surface, 2... Water bottom surface, 3... Hollow cylindrical body,
4... Floating chamber, 5... Wire, 6... Weight, 7...
... Check valve, 8 ... Partition wall, 9 ... Air storage chamber, 10
... Submersible motor, 11 ... Rotating shaft, 12 ... Single suction type impeller, 13 ... Nut and washer,
14...Support plate, 15...Bolt and nut, 1
6... Water intake port, 17... Pressure resistant air pipe, 18... Check valve, 19... Buoy, 20... Installation rope, 2
1... Electric wire for underwater motor, 22... Automatic open/close switch with timer, 23... Power distribution board.

Claims (1)

[Scope of utility model registration request] A partitioning bulkhead with a check valve in the center is provided at the bottom of the hollow cylinder, which can be installed upright on the bottom of the water, to divide the inside of the cylinder into two. Several water intake ports are provided near the bulkhead, and a single-suction type impeller for the pump is attached to the rotating shaft of the submersible motor inside the air storage chamber, with the impeller positioned slightly below the bottom end of the cylindrical body. Indoor waste water is sucked and discharged outside the storage chamber, and the air storage chamber is communicated with the atmosphere through an intake pipe with a check valve inserted, and the impeller connected to the submersible motor automatically rotates and stops. An intermittent vacuum intake air pumping device characterized in that an air storage chamber is alternately filled with sewage or air under control and the filled air is injected and discharged into a hollow cylinder through a check valve.