JPS6117278Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is designed to install a motor to a rice field located high above a river.
Regarding known automatic water pumps that automatically supply water without using an engine, etc., improvements to solve the difficulties that arise with miniaturization when miniaturizing this type of machine and making it usable for scientific learning. This is related to.

As an automatic water pump, there are already patent Nos. 195895 and 195895.
There are No. 196087, No. 215869, No. 219949, etc., and the following is known about the principle.

First, to explain this with reference to the drawings, when water is made to flow from a water source at a predetermined height (not shown) through a downwardly inclined water pipe 1 to a valve chamber 3 provided below the main unit 2, A weighted reaction valve 4 hinged to the terminal of the valve 3 closes the drain port 5, and as a result, the water pressure in the valve chamber 3 increases, and the water in the chamber 3 flows into a buffer tank connected above the valve chamber 3. 6 through a lift valve 7.

When the pressures in the valve chamber 3 and the buffer tank 6 reach an equilibrium state, the pumping valve 7 closes, and as a result, the pressure in the valve chamber 3 decreases and the weighted reaction valve 4 closes. Open and move.

Therefore, the water in the valve chamber 3 is discharged from the drain port 5,
At this time, outside air flows into the same chamber 3, and then the water flow generated by this discharge causes the weighted reaction valve 4 to close again by the water hammer action as described above, and the water in the valve chamber 3 is again closed. When flowing into the buffer tank 6 via the pumping valve 7, the introduced outside air is also introduced into the tank 6,
The air pressure in the upper air layer 8 in the buffer tank 6 increases.

By automatically repeating the opening and closing operation of the weighted reaction valve 4 in this way, the air pressure is sufficiently increased, so that the water in the buffer tank 6 is caused to protrude upward from the lower side of the buffer tank 6. The water will be pushed up into the pumping pipe 9.

In the illustrated case, the air in the cover 10 attached to the tank 6 is introduced into the air discharge pipe 11,
The tip nozzle 12, 1 inserted into the pumping pipe 9 of 1
2'... are dissipated into the pumping water as air bubbles 13, and the floating force of the air bubbles 13 enhances the water pumping effect.

The operating principle described above is exactly the same in the present invention. However, if it is to be used for scientific learning rather than for irrigation as in the past, it is required to be smaller. 1 has a uniform diameter up to the inlet end of the valve chamber 3, so that the water pipe 1 has a uniformly small diameter. The water attempting to flow down is subjected to a large frictional resistance due to the inner wall of the pipe, and as a result, the water pumping capacity is significantly reduced, making it impractical.

Therefore, in this invention, improvements are made to this water pipe 1,
The inlet end 3' of the valve chamber 3 is made thin based on the above request, but the water conduit 1 has a larger diameter than the same end port 3', and the lower end of the water conduit 1 has a tapered part. 1', and the tip of the part 1' is connected to the water guide end opening 3', and at this time, the water guide pipe 1
It is desirable that the introduction end portion 3' and the introduction end portion 3' be coaxial.

In the present invention, as described above, the large-diameter water pipe 1 is connected to the inlet end port 3' via the tapered part 1', so the flow velocity distribution A of the flowing sewage in the large-diameter water pipe 1 is As shown in the diagram, the axial center of the pipe 1
The flow velocity at A' is high, and this axis center point
Since the flowing water from A' flows into the narrow inlet end 3', the water with a high flow velocity in the water pipe 1 can be effectively utilized, and as a result, the pumping capacity can be reduced by reducing the overall pumping capacity. However, it is possible to obtain a practically usable product without significantly lowering the water pressure, and since there is no stepped part due to the continuous connection by the tapered part 1', turbulence is less likely to occur. Energy from water can be used efficiently to pump water, making it possible to conduct easy learning experiments in classrooms and the like.

[Brief explanation of the drawing]

The figure is a longitudinal sectional side view showing the main parts of the automatic water pump according to the present invention. DESCRIPTION OF SYMBOLS 1...Water pipe, 1'...Tapered part, 3...Valve chamber, 3'...Introduction end part, 4...Reaction valve with weight, 5
... Drain port, 6 ... Buffer tank, 7 ... Pumping valve,
8... Upper air layer, 9... Lifting pipe.

Claims (1)

[Claims for Utility Model Registration] (1) By causing water to flow down from a water source at a predetermined height through a downwardly inclined water pipe, a weighted reaction of a valve chamber connected to the lower end of the water pipe The valve is closed by a water hammer action to increase the water pressure in the valve chamber,
This pressure increase causes water in the valve chamber to flow into a buffer tank connected above the valve chamber via a pumping valve,
The pumping valve is closed by equalizing the pressure between the valve chamber and the buffer tank, and the weighted reaction valve is opened by reducing the pressure in the valve chamber, thereby causing water in the valve chamber to be discharged from the opened drain port. When outside air is introduced into the valve chamber, and then the weighted reaction valve is closed again by the discharge so that the water in the valve chamber flows into the buffer tank via the pumping valve as described above, the introduced outside air is also The water in the buffer tank is introduced into the same tank to increase the air pressure in the buffer tank, and due to the repeated opening and closing of the weighted reaction valve, the increase in air pressure causes the water in the buffer tank to be pushed upward from the bottom of the tank. When miniaturizing an automatic hot water machine that pumps water into a built-in pumping pipe so that it could be used for scientific learning, this was installed at the inlet end of the valve chamber, which was made smaller due to the miniaturization. An automatic water pump for science learning, consisting of a water guide pipe with a diameter larger than that of the previous one, which is connected through a tapered part formed at the lower end of the pipe. (2) An automatic water pump for science learning as set forth in claim 1 of the utility model registration claim, in which the water conduit and the inlet end of the valve chamber are connected on the same axis.