A spiral pump is a special kind of pump that works by spinning water around in a spiral shape. Just like when you spin a ball around on a string, the water gets pulled along with it and moves through the pump.
Inside the spiral pump, there is a long tube with a spiral shape inside. Imagine a piece of spaghetti that has been twisted into a spiral shape - that's what it looks like. When you turn the spiral pump on, water gets sucked into one end of the tube and starts to travel through the spiral.
As the water moves through the spiral, it gets pushed outward along the edges of the tube. This creates pressure that helps to move the water along even faster. At the end of the spiral, the water gets pushed out and can be used for things like irrigation or drinking water.
The cool thing about spiral pumps is that they don't need any electricity or fuel to work. All you need is a source of running water, like a stream or river, and the spiral pump will use the energy from the moving water to spin and pump the water where it needs to go. They're a great way to move water without using up any extra energy!