QYF15-55 mine pneumatic dredging sewage pump, QYF series of mine pneumatic dredging sewage pumps, sewage pumps pneumatic dredging, mining dredging pump, QYF mining dredging pump, coal dredging pumps, pneumatic dredging pumps, Pneumatic dredging pumps in recent years, China's coal exports continued to decline, QYF15-55 mine at the same time, China's coal imports have seen a sewage pump with pneumatic dredging continues to grow, import and export of such serious on "upside down", is between domestic coal and imported coal prices by emerging differences. At present, China's coal mining dredging pump lack of competitive advantage in the international market, has been a very serious problem. Therefore, for the export of coal, it should also increase efforts to reduce export tariffs, or even zero tariffs. First, an overview of intelligent energy efficient mining pneumatic dredging sewage pump is our own innovation, independent research and development, with independent intellectual property rights of the series sewerage, product technology at the international advanced level. The dredging sewage pump powered by compressed air for sewage drainage work containing methane and coal dust explosion hazard of coal mining face underground roadway, bottom of the nest and sewage sumps (wells), water storage and so on. We developed the dredging sewage pump to achieve a fast and efficient processing of coal mine water storage slime, water mixture, completely remove the artificial water storage of heavy dredging work, while reducing the number of new underground water storage, not only to improve the mine water storage dredging of overall economic efficiency, but also to achieve the management and protection of the environment, saving time and effort, with a wide range of practicality. Second, the basic parameters of the dredging pump Model flow m3 / h Head m Air consumption m3 / min Working pressure MPa Dimensions QYF25-20 25 20 9.5 ~ 10.5 0.5 ~ 0.7 1830 × 885 × 965 QYF20-20 20 20 8.5 ~ 9.5 0.5 ~ 0.7 1830 × 834 × 915 QYF17-20 17 20 6.5 ~ 7.5 0.5 ~ 0.7 1830 × 782 × 890 QYF14-20 14 20 5.0 ~ 5.5 0.5 ~ 0.7 1830 × 782 × 890 QYF10-20 10 20 4.5 ~ 5.0 0.5 ~ 0.7? 1830 × 782 × 890 Third, the product structure and working principle of the dredging of the main components of the sewage pump includes a body portion, control systems and components such as vacuum aspiration. 1, the main parts: the pump, feed pipe, discharge pipe, whose job is to act as suction and discharge. 2, the control system: The control system is the use of the main gas control valve, limit switch, shuttle valves, ball valves and other body Temporal logic and organic combination, to achieve control and switching actuators, to work suction unit nesting material and orderly transition. 3, vacuum suction components: vacuum suction assembly consists of contraction after the first expansion of the Laval nozzle, vacuum chambers and expansion tubes and other components. It is designed according to the principles of the Venturi effect, including the air supply port, an exhaust port and vacuum port. When the air inlet supply pressure higher than a certain value, supersonic jet injection nozzle, due to viscosity of the gas, high-speed jet entrainment go negative pressure chamber of the gas, so that the cavity forming high vacuum. The minimum diameter of the vacuum generator performance and nozzle, the contraction and spread of tube shape, diameter and the relative position of the size of the gas supply pressure and many other factors. The vacuum suction pump and suction assembly by opening the same, when the control system to cycle control cylinder working to complete the suction and discharge process unit.