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Long distance pneumatic conveying system is mainly used for the transportation of construction materials and auxiliary materials in underground projects such as mine, subway, tunnel and so on. It has the characteristics of flexible layout, small pollution, no scattering, high degree of automation, strong adaptability and so on. It is an ideal choice for the transportation of underground construction materials. According to the field situation, different specifications and forms of equipment can be used to meet the requirements of different materials, conveying capacity and distance.

The underground long distance pneumatic conveying system is usually composed of three parts: the underground storage and transportation system, the underground transit system, the underground terminal system. According to the technological requirements, configuration of different specifications, quantity, transit and ground terminal system, the system for pipeline connection, convenient installation, low space requirements, and can be easily realized by switching valve of multi working face transport, improve equipment utilization, reduce customer cost.

On the storage and transportation system composed of silo, ground transmission unit. The silo is on the ground above the sending unit, for the material added in batches sending unit for transmission, and act as a buffer, to ensure the continuity of delivery. The process is as follows: the prepared material sent to the silo, silo with a certain volume, can be maintained for a period of time in the preparation of feed transmission failure, provide time for maintenance treatment. The bunker is usually two Taiwan transmission device, in order to improve the efficiency of work by turns. A transmitting device to which bin charging another in the transport state, constantly switching so as to realize the continuous conveyor. The ground system is a part of the whole system is essential, complete the task materials to the underground from the ground, and to control the whole system, the operator can operate, in the PC monitoring control device of underground wells, all.

Underground transit system, by one equipped with a filtering device, a discharging device and a pressure monitoring horizontal bin and a set of parallel transmission device. Used for conveying the ground system to the underground storage and transportation to the next transfer system. Its capacity and transport capacity depends on the needs of the scene.

Storage, from the ground to the underground transportation system of the material, first entering the transit system for horizontal bin temporary storage, through the bottom of the discharging screw or top suction gun materials will be transported to the batch sending device matching in parallel. Two transmission devices to switch work, one of the transfer of a feeding, to achieve continuous delivery, the material to the lower transfer system or terminal system, a single transmission distance of up to 1500 meters.

The terminal system, usually by one equipped with a filtering device, a discharging device and a horizontal bin, pressure monitoring walking device, discharge system and mixing humidifying system. The material used for storing the conveying of the transfer system, and through the discharging device, the material is required to be sent to the mixing and humidification system, which is used for the final scene. In order to meet the requirements of the underground working face, the terminal device can be matched with the corresponding walking device, so that the terminal system can follow the working face and meet the requirements of continuous operation.