The development trend of vacuum pump technology is driven by the market demand. As the country has strengthened the safety requirements for coal mines, the use of high-quality 2BV water ring vacuum pump has become a necessary safety requirement for the coal industry. As the safety work is further strengthened, all 2BV water ring vacuum pumps will be more and more widely used in the coal mine system. Next, EVP vacuum pump manufacturer will give you a brief analysis of the application of 2BV water ring vacuum pump in the field of coal mine.
The 2BV type water ring vacuum pump can discharge water without bottom valve of centrifugal pump. It needs to set water tank for artificial water filling. The water demand is not much, but the vacuum pump and motor should occupy the ground area, and one for use and one for standby. The start-up time of the two pumps is also different. Each mine can be selected freely according to the actual situation, which can achieve economic operation, high efficiency and energy saving, and meet the requirements of (code for design of underground drainage in coal mines).
Know why to choose vacuum pump in the actual application of coal mine drainage, that is because in the coal mine production process, there are often various sources of water into the mine, called mine water. A large number of mine water threatens the normal operation of mine production. If there is an emergency, it will affect the production, and if there is a serious accident, it will even cause casualties. In China, only a small part of the mine is dry, so in the process of mining, in order to ensure the safety of production drainage is essential, drainage control system is an indispensable equipment for mine operation, and plays a crucial role in ensuring the normal production of the mine.
The general vacuum pump used in coal mine is 2BV water ring vacuum pump. The limit vacuum obtained is 3300pa. The pump can be started in tens of seconds and the drainage arrangement can be made. The water ring vacuum pump is an axial single acting structure, and the impeller and the pump body are installed relatively eccentrically. Therefore, when the impeller rotates, the water is thrown around by the impeller. Due to the centrifugal force, the water forms a closed water ring of equal thickness, which is determined by the shape of the pump cavity. The inner surface of the upper part of the water ring is tangent to the impeller hub, and the inner surface of the lower part of the water ring is just at the top of the blade. Contact (in fact, the blade has a certain insertion depth in the water ring). A crescent shaped space is formed between the impeller hub and the water ring, which is divided into several closed chambers with different volumes according to the blades, and rotates with the impeller. If the upper part of the impeller.
As the starting point, when the impeller is 180 ° before rotation, the volume of the small chamber becomes larger from small to large, and is connected with the suction port on the end face. At this time, the gas is inhaled, and when the suction is finished, the small chamber is isolated from the suction port; when the impeller continues to rotate, the small chamber becomes smaller from large, so that the gas is compressed; 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 shell of the main pump. The drainage pipe of the vacuum pump guides the ditch in the water pump room, and the water seal pipe of the vacuum pump continuously supplies the sealing water to the vacuum pump. A one-way valve is set on the discharge pipe from the balance chamber. Before starting the water ring vacuum pump, open the valve, and then start the vacuum pump. At this time, the solenoid valve automatically opens and fills the water pump. A 1m3 water tank on the wall is designed in the pump house of the four mines to supply water for the vacuum pump.
2BV water ring vacuum pump can discharge water without bottom valve of centrifugal pump. Water tank shall be set for artificial water filling. There are few water requirements, but the vacuum pump and motor shall occupy the ground area, and one for use and one for standby. The start-up time of the two pumps is also different. Each mine can be selected freely according to the actual situation, which can achieve economic operation, high efficiency and energy saving, and meet the requirements of (code for design of underground drainage in coal mines).
In the process of underground mining, a large amount of groundwater will flow into the working face and affect the normal production of the mine. Therefore, appropriate methods must be taken to discharge the groundwater from the surface to ensure the safety of the mine operation. The practical application of vacuum pump in coal mine drainage is to solve this situation and ensure the safety of operators in the process of work.