Bus-controlled pneumatic conveying gulp valve and control system

Abstract

The bus-controlled pneumatic conveying gulp valve comprises a valve body, a central control unit, a pressure core body and a miniature electromagnetic valve, the valve body comprises an upper valve body, a main valve body and a lower valve body, the upper valve body is arranged at the top of the main valve body, the lower valve body is arranged at the bottom of the main valve body, a hollow piston shaft is arranged in the main valve body, and the piston shaft is arranged in the central control unit. An annular flange is arranged in the middle of the piston shaft in a protruding mode, the piston shaft is movably connected with the interior of the main valve body in an airtight mode through the annular flange, a spring is arranged between the upper valve body and the annular flange, a sealing base is arranged on the lower valve body, and the bottom of the piston shaft is matched with the sealing base in a sealing mode under the action of the spring. The valve can be flexibly controlled to be opened for air supply according to the pressure of a conveying pipeline or a signal on a field bus.

Description

technical field [0001] The invention relates to the technical field of bulk material pipeline pneumatic conveying, in particular to a bus-controlled pneumatic conveying air supplement valve and a control system. Background technique [0002] Pneumatic conveying, also known as airflow conveying, is a conveying technology that uses the energy of airflow to convey granular materials along the direction of airflow in a closed pipeline. It is widely used in thermal power, steel, chemical and metallurgy and other fields. Due to the instability of the characteristics of the bulk material to be transported, or the deviation of the fly ash content between the actual burned coal and the designed coal type, it is easy to cause unstable pneumatic conveying, difficulty in bulk material transportation, and frequent pipe plugging failures. It is more obvious when it is transported over a long distance. [0003] At this stage, in order to reduce pipe plugging and increase system stability,...

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Problems solved by technology

Using the above mechanical control method, firstly, because of purely mechanical equipment, the control accuracy is poor, and it is impossible to monitor the status of the valve in real time, and it is impossible to judge the damaged equipment and perform maintenance in time; secondly, it is impossible to monitor the pressure of the transmission pipeline and the instantaneous The pressure field conditions; the third is that once the system is designed, it is difficult to adjust, and the response speed is slow and there is a large delay, the actual scope of application is limited

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