Vacuum Pump in Coal Mine

The vacuum pump used in coal mine is 2BV water ring vacuum pump. The maximum vacuum obtained is 3300 Pa. The pump can be started in tens of seconds. The drainage arrangement is shown in Figure 1. The water ring vacuum pump is an axial single-acting structure, the impeller and the pump body are installed relatively eccentrically. Therefore, when the impeller rotates, the water is thrown around by the impeller. Because of the centrifugal force, the water forms a closed water ring which is approximately equal thickness depending on the shape of the pump chamber. The inner surface of the upper part of the water ring is just tangent to the impeller wheel, and the inner surface of the lower part of the water ring is just right to the top of the blade. Contact (actually the blade has a certain insertion depth in the water ring). A crescent-shaped space is formed between the impeller wheel and the water ring. According to the blade, the impeller is divided into several closed chambers with different volume, which rotate with the impeller.liquid_ring_vacuum_pump


If the upper part of the impeller is used. As a starting point, the volume of the small chamber increases from small to large when the impeller rotates 180 degrees, and is connected with the suction port on the end surface. At this time, the gas is absorbed, and at the end of the suction, the small chamber is isolated from the suction port. When the impeller continues to rotate, the small chamber becomes smaller and compresses the gas; when the small chamber is connected with the exhaust port, the gas is discharged out of the pump. The suction pipe of the vacuum pump is connected with the first stage pump housing of the main pump. The drainage pipe of the vacuum pump guides the water in the pump room ditch. The water sealing pipe of the vacuum pump continuously supplies water to the vacuum pump for sealing, and a one-way valve is installed on the discharge pipe of the balance chamber. Before starting the pump, open the valve and then start the vacuum pump. At this time, the solenoid valve opens automatically and fills the pump. Four mine water pumping houses have designed a wall 1 m3 water tank for vacuum pump irrigation.rotary-vane-vacuum-pumps

2BV water ring vacuum pump can achieve centrifugal pump without bottom valve drainage, need to set up water tank, artificial irrigation, water demand is not much, but the vacuum pump and motor to occupy the ground area, and one with one. The start-up time of the two pumps is also different. Each mine can choose freely according to the actual situation, which can achieve economic operation, high efficiency and energy saving, and meet the requirements of (design code for underground drainage in coal mine).liquid-ring-vacuum-pump-for-food-processing