JPH0744800Y2 - Intermittent air pumping device for shallow layers - Google Patents

Description

[Detailed description of the device] (a) Industrial application field This device is designed to apply a large amount of bottom water of shallow harbors, lakes, ponds, etc. to the surface of water by utilizing the buoyancy action of water and the swirling flow action of water. Water is generated by swirling and levitating, breaking the stratum corneum in surface water, mixing surface water rich in dissolved oxygen with bottom water that tends to be deficient, and moving oxygen in the atmosphere into water due to contact between the atmosphere and surface water. The present invention relates to a shallow layer intermittent air pumping apparatus that purifies water quality while maintaining aerobic conditions all the way to the bottom layer.

(B) Conventional technology The conventional pumping equipment of this kind is disclosed in Japanese Examined Patent Publication No. Sho 42-5795 and Japanese Utility Model No.
As disclosed in 12960, the air suddenly ejected from the air storage chamber into the hollow cylinder by the reverse siphon action becomes an air mass in the cylinder, and acts like a piston to linearly move the water in the cylinder upward. In addition, when the water is floated up to the bottom, and the suction rising water due to the lower negative pressure due to the rising of the air mass also rises vertically in the cylinder as well, in the case of shallow water that can not take a long cylinder length In comparison, the amount of pumped water was small, and the effects on the surroundings of pumped water, that is, the amount of surface water and bottom water mixed, the increase in dissolved oxygen due to the formation of fine bubbles in bubble lumps, etc. were small defects due to the linear flow.

(C) Problems to be solved by the present invention The present invention eliminates the above-mentioned drawbacks, and even when the length of the hollow cylinder is short, the air storage chamber is provided on the lower outer surface of the hollow cylinder to increase the cylinder length, Furthermore, the number of exhausts from the storage chamber due to the reverse siphon action is increased by the flow control valve to prevent the decrease of the pumped water volume as much as possible, and the spiral blade causes the swirling upward flow to break the stratum corneum in the surface water and the surface water due to the convection action. With the objective of obtaining an intermittent air pumping device for shallow water that has the same water purification capacity in shallow water as in mixed circulation of water and bottom water, increase in dissolved oxygen due to contact between surface water and the atmosphere, etc. To do.

(D) Means for Solving the Problems This invention will be described with reference to the drawings. In FIG. 1, the upper and lower ends of the hollow cylindrical body 3 are opened and a float 4 having air sealed inside is provided around the upper end surface. The levitation force and the gravity of the weight 6 from the lower end of the tubular body through the wire 5 allow the hollow tubular body 3 to naturally stand upright in water. Next, a cylindrical annular air storage chamber 7 whose upper end is closed and whose lower end is opened is provided on the outer surface of the lower part of the hollow cylindrical body 3, and an opening 8a is provided in the upper part of this air storage chamber 7 and the other end is An opening is formed in the lower center of the hollow cylindrical body 3.
The U-shaped siphon tube 8 having 8b is provided, and the hollow cylindrical body 3 is further provided.
The outer surface of the inner U-shaped siphon tube 8 and the inner surface of the hollow cylindrical body 3 are connected by several spiral blades 9 for swirling flow, and air is stored from an external compressor 10 via an air supply pipe 11 and a flow control valve 12. An intermittent air pumping apparatus for shallow layers, which is characterized by continuously supplying air to the chamber 7.

(E) Operation In order to explain the operation of the present device configured as described above, as shown in FIG. 6, when an appropriate number of water is dropped into a lake, harbor, pond or the like at an appropriate interval, the device is a float 4 Due to the levitation action and the sinking action of the weight 6, the weight 6 naturally stands upright in the water at the position where it comes into contact with the water bottom surface 2. The state of the apparatus at this time is as shown in FIG. 3, and only a small amount of air is left in the float 4 and the uppermost portion of the air storage chamber 7 in the apparatus, and the rest is filled with water. Next, the compressed air supply device 10 such as a compressor is operated to send air little by little into the air storage chamber 7 through the air supply pipe 11 and the flow rate control valve 12.
As shown in FIG. 4, the water in the inside is discharged to the outside from the lower opening, and the air gradually accumulates in the upper part, and the steam contact surface L-
L gradually falls. At this time, U-shaped siphon tube 8
It goes without saying that air enters through the opening 8a and has the same air / water contact surface as the air storage chamber 7. This air / water contact surface is the upper edge MM of the curved portion of the U-shaped siphon tube 8 shown in FIG.
When it goes down below the surface, the air accumulated in the air storage chamber 7 as shown in FIG. 5 suddenly jets into the hollow cylindrical body 3 through the U-shaped siphon tube 8 by the reverse siphon action. Since this siphon action is performed within an extremely short time of a few seconds, the jet action of the ejected air mass rapidly raises the in-cylinder water by the piston action when the air mass rapidly rises inside the hollow cylindrical body 3, and at the same time, the negative effect after the air mass rises. The external water below the hollow cylindrical body is sucked into the pressure portion, but the suctioned rising water at this time passes through the inside of the spiral blade 9 for swirling flow, and is swirling action to rise while swirling in the cylindrical body. At this time, the bubble lumps in the ascending water gradually become finer due to the swirling, entraining the surrounding water in the flow and contacting this to increase dissolved oxygen, destroying the stratococcus in the surface water and reaching the water surface. .

(F) Effect of the device According to this device, even when the depth of water such as lakes, harbors, reservoirs, and ponds is shallow, the dissolved oxygen is enriched to the bottom layer by convection and swirling flow to purify the water quality under aerobic conditions. be able to.

[Brief description of drawings]

FIG. 1 shows an embodiment of the intermittent type air pumping apparatus for shallow layers of the present invention. FIG. 1 is a longitudinal sectional view of the embodiment, FIG. 2 is its plan view, and FIGS. FIG. 6 is an operation explanatory view showing a state in which this device is installed on the water bottom. 1 ... Water surface, 2 ... Water surface, 3 ... Hollow cylinder 4 ... Float, 5 ... Wire, 6-weight 7 ... Air storage chamber, 8 ... U-shaped siphon tube 8a, 8b ... Siphon Pipe opening 9 …… Swirl blade for swirling flow, 10 …… Compressor 11 …… Air supply pipe, 12 …… Flow control valve 13 …… Installation rope, 14 …… Buoy

Claims (1)

[Scope of utility model registration request] 1. A cylindrical annular air storage chamber (7) in which both ends of a hollow cylindrical body (3) which can be installed substantially vertically in water are opened, the lower outer surface of the hollow cylindrical body is closed at the upper end and the lower end is opened. And a U-shaped siphon pipe (8) having one end opened at the upper part of the air storage chamber and the other end opened at the center of the lower part of the hollow cylindrical body, and further outside the U-shaped siphon tube inside the hollow cylindrical body. An intermittent air pumping apparatus for shallow layers, characterized in that several spiral blades (9) for swirling flow are provided between the hollow cylinder and the inner surface of the hollow cylinder, and pressure air is continuously fed from the outside to the air storage chamber. .