Of course, if you see such a pump for the first time, then like me you may think that this is nonsense... The same as the invention of a perpetual motion machine... But no, everything is much simpler and quite easily explained. This is a 100% working model of a water pump, repeated by more than one craftsman.
Making a water pump
So, first, I will tell you how the pump works, and then its operating principle and operation in real conditions.
Design with description
This is what he looks like. Everything is made from PVC pipes.
In this case, the design looks like a straight pipe with various valves and taps, with a branch in the center of the thicker diameter pipe.
The thickest part is a buffer or receiver for accumulating and stabilizing pressure. Inlet and outlet ball valves are installed on the left and right.
I will be looking at the pump from right to left. Since the right side is the entrance for water, and the left is the exit.
In general, we realized that water is supplied to the ball valve on the right. Next comes the tee. Tee, separates the flows. It flows up to the valve, which closes when there is sufficient pressure. And the direct flow is supplied to the valve, which opens when the desired pressure is reached.
Then, the tee goes again to the receiver and to the output. Oh, and a pressure gauge, but it may not be there, it’s not that important.
Details
All parts are laid out before assembly. I use PVC pipes, they are glued with glue, but polypropylene can also be used.
Valve.
Assembly
I'm collecting. The second valve is in the middle and looks a little different. The difference between these two valves is that the brass valve will initially always be open, while the PVC valve will initially always be closed.
Assembling the buffer-receiver.
The end part of the pump.
Almost finished sample.
Let's add a pressure gauge to measure pressure during operation.
The water pump with pressure gauge is ready for testing.
Pump tests
It's time to install and test the pump. I would like to make a reservation and say that the pump does not pump water, but rather increases its pressure. What I mean is that the pump needs an initial pressure to operate.
To do this, install a pump in a small stream. Let's connect a long pipe several meters long (this is a mandatory condition) and draw water from a small hill. As a result, water will flow to the pump itself.
We place the receiver vertically, the brass valve should be in the open air.
And the pump, clicking the valves, begins to supply water above the intake level. Much higher than the level of water intake at the beginning of the pipe.
Working principle of a water pump
All this seems truly amazing and incredible, but there is no secret here.Such water pumps are also called hydraulic shock pumps and they work like this:
When water is supplied, it immediately rushes into the open valve.
As soon as the water gains a slight run-up, this valve will close sharply. And since the column of water in the pipe has inertia, like any physical mass, a water hammer will occur, which will create excess pressure that can open the second valve. And the water will rush into the receiver, where it will compress the air.
As soon as the excess pressure is extinguished and becomes less than the outgoing one, the middle valve will close and the upper one will open. As a result, water will again flow through the top valve.
Then the cycle repeats.
For more detailed animation, watch the video:
Such pumps can create pressure 10 times higher than the initial one! And to confirm this, watch the video:
