Sichuan screw pump

Introduction to screw pump:

Spiral pump, also known as "spiral water pump" or "Archimedean spiral pump". A pump that uses the rotation of spiral blades to make water rise in a spiral shape along the axial direction. Composed of a shaft, spiral blades, and an outer shell. When pumping water, place the pump diagonally in the water so that the inclination angle of the main shaft of the pump is smaller than the inclination angle of the spiral blades, and the lower end of the spiral blades is in contact with the water. When the prime mover drives the screw pump shaft to rotate through the variable speed device, water enters the blades and rises along the spiral flow channel until it flows out. The structure is simple, easy to manufacture, with a large flow rate, low head loss, high efficiency, and easy maintenance. However, the head is low and the speed is low, requiring the installation of a variable speed device. It is commonly used for irrigation, drainage, and lifting sewage, sludge, and other applications. China has been using it since the 1970s.