A Feedback Control System for Sewage Pumping Station

Abstract

The invention relates to the automatic detection control field, particularly to a sewage pumping station feedback control system. The whole system comprises a sewage detection control part used for controlling operation of a pump group at different working modes, a pump-pump rotary speed control part used for regulating and controlling pump rotary speeds of the pump group at each working mode, a sewage poll water position feedback control part used for controlling operation of a sewage pumping group parallel backup pump, and a pump gas etching protective feedback control part used for controlling to reduce influence of a gas etching cavitation phenomenon on the operation of the pump. Specific to the problems of the sewage pumping station existing on the aspects of automatic regulation, standard, an automatic control system, a fault self-diagnosis technology, and the like, the independent and completely-functional automatic feedback control system is established, so that the monitoring and control automatic functions of the sewage pumping station are improved, and the operating efficiency of the sewage pumping station is improved.

Description

technical field [0001] The patent of the present invention relates to the field of automatic detection and control, in particular to a sewage pumping station feedback control system. Background technique [0002] With the development of industrial and agricultural production and the progress of science and technology, the pumping station project in our country has been greatly developed. Since automation technology began to be applied in pumping station engineering in the 1970s, its technical level has been continuously improved, and its application scope has also been expanding. Today, pumping station automation technology and automation control have begun to take shape and are gradually integrated development in the direction of modernization and intelligence. At present, most of the sewage pumping stations in my country have realized automation, which can realize the two functions of monitoring and control. Generally, the sewage is concentrated through the collection pi...

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Problems solved by technology

[0003] However, when the automation level of the pumping station reaches a certain level, there are still many deficiencies and areas to be improved, and there are still many spaces worthy of further research and improvement. The automation at this stage is mainly composed of programmable logic computers and human-machine interfaces. , the control of the water pump is only a simple switch control, so regardless of the constant or variable inlet sewage flow, the motor will start and stop frequently, and the starting current of the water pump is large when starting, which seriously affects the use of electrical equipment in the same grid; even if the self-coupling step-down , magnetic control step-down and other ways to start current limiting, but there are still many problems: such as the current peak impact at the moment of starting, the maintenance of starting equipment such as contactors is large, and the mechanical impact of the water pump is relatively large, which may easily cause damage to the pump bearings and impellers. , in addition to the above unfavorable factors, there may be special circumstances in the pumping station, such as rainy and snowy weather, other pumping station equipment failures, etc., resulting in increased flow, and pump failures in its own pumping station, resulting in blocked sewage discharge

[0004] After retrieval, the patents related to the present invention include: Sewage Pumping Station Control System Based on GPRS Wireless Network (Publication No.: CN105182945A), providing a sewage pumping station control system based on GPRS wireless network, belonging to the field of sewage pumping station control, controlled by remote Terminal, control terminal GPRS wireless module, GPRS satellite base station, processing terminal GPRS wireless module and sewage treatment terminal, the manager of the sewage pump station can remotely control the treatment equipment of the sewage pump station through the remote control terminal, solving the problem of existing sewage pump Station operation is difficult and the operating efficiency of the system is low, but its control management mode is difficult to realize for ordinary sewage pumping stations, and its limitations are relatively large; a prefabricated buried integrated sewage pumping station (CN202809825U), its pumping station The main body includes the water collection well, the pump station tank and the pump station control room. The pump station tank is equipped with a pump station control room. The pump station control room is equipped with a control cabinet. The land area is small, saves land resources, avoids the generation of grid slag, simplifies the treatment process, saves energy, and reduces operating costs, but it lacks the regulation function for different sewage types and flows, and the work is not flexible and the efficiency is not high

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