Diving pump - a mechanism for supplying air from the surface through a hose to a diver’s suit (in particular, three-bolt diving equipment ), for work at a depth of up to 20 meters . It can be set in motion both by the muscular power of people and by electric motors.
Hand pumps
Two-cylinder diving pump, (two-cylinder) - a diving pump, arranged on two cylinders . It is driven in a swinging motion in a vertical plane. Pistons compressing the air inside the cylinders push it through the valves located at the bottom of the cylinder into the air supply hose. The design of the cylinders as well as the valves is made of brass to prevent corrosion and increase the reliability of the structure. Compared to a three-cylinder pump, more effort is required to maintain the same pressure in this case, however, the design of such a pump is simpler.
Three-cylinder diving pump, (three-cylinder) - a diving pump arranged on three cylinders. Rotating the handles of large "wheels" ( flywheels ), the crankshaft inside the pump was set in motion on the left and right sides of the pump. Pistons attached to the crankshaft while moving forced air into the supply hose, and then into the diver's suit. At the same time, the deeper the diver worked, the more it was necessary to pump the pump in order to create sufficient pressure to work at depth. For this, the pump was equipped with a manometer. For every 10 meters you need 1 atmosphere. Thus, working at a depth of 20 meters, it was necessary to pump air with a pressure of 2 atm.