Centrifugal pumps are divided into general centrifugal pumps and self-priming centrifugal pumps two. Self-priming centrifugal pump without starting irrigation, small centrifugal pump using self-priming, easy to use. First, the structural characteristics Self-priming centrifugal pump efficiency by the impeller pump hydraulic structure of the pump structure and the self-priming structure of the rational decision, any factor can not be neglected. BX are internal mixing self-priming centrifugal pump, the pump main features are: 1, the impeller and the pump hydraulic structure parameters of the larger blade outlet mounting angle and width of exports, the pump flow passage cross-sectional area than conventional Designed to increase 20-30%. 2, volute flow path connected to the pump body outlet, near the pump body outlet has a backwater window. Under the pump body backwater runner, using a mixed flow ball valve automatic switching device (referred to as the ball valve), its novel structure, simple, easy processing, reliable use. Second, the working principle This self-priming centrifugal pump working principle is that the impeller rotation, inhalation of air in the inlet pipe and by the backwater valve body of water inhaled in the impeller mixing, water and air mixture by the pump pressure chamber, Diffusion tube and backwater window into the gas-water separation chamber. The air in the mixture is lighter, escaping from the water and exiting the exhaust cup into the atmosphere. The air, which has separated the air, is returned to the valve body by the nozzle to the impeller and is again mixed with the sucked air. This repeated cycle, gradually drain the air into the water pipe, and finally normal pumped water. At this time, back to the valve body inlet and outlet pressure surge increased rapidly, the ball valve in the differential pressure rise, the return valve body inlet closed, the reflux is cut off, the pump into the general centrifugal pump operating conditions. When the machine is shut down, the pressure difference between the two ends of the backwater valve rapidly disappears, and the ball valve returns to its original position due to its own weight. Because of the structure, the outlet of the volute channel is communicated with the outlet of the pump body to overcome the diffusion and impact loss of the liquid flow; and the ball valve automatic opening and closing device can promptly eliminate the return loss when the pump is normally pumped. Therefore, this self-priming structure enables the efficiency of self-priming centrifugal pumps close to the centrifugal pump level. This pump is equipped with a flapper at the inlet 4, after the pump is stopped, the vacuum created by the water leak in the inlet pipe and the static pressure of the water stored in the pump, the door is close to the pump inlet, Keep the pump water. Re-start within a short period of time, no need to fill irrigation, which gives users convenience in use.
Towel Ring,Hand Towel Ring,Towel Ring Holder,Bathroom Towel Ring
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