A water supply pump control device
A technology for control devices and water supply pumps, applied in pump control, liquid variable displacement machinery, machines/engines, etc., can solve the problems of unable to control the start and stop of water pumps, unable to start and stop water pumps normally, hidden safety hazards in steelmaking and blowing, etc. Achieve the effects of simple structure, normal production and strong applicability
Active Publication Date: 2015-10-21
JIANGSU LIANFENG IND EQUIP TECH CO LTD
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Problems solved by technology
[0002] The water supply pump for evaporative cooling water in the pump room is designed with Siemens S120 series inverters, and communicates with the PLC through the Profibus protocol. However, in terms of water pump control, the water pump can only be controlled on the WinCC screen, and the water pump cannot be controlled locally. Start and stop control
Once there is an abnormal situation such as communication interruption, the water pump cannot be started and stopped normally, and the water pump that is running normally will also stop the pump suddenly, which will cause great safety hazards during steelmaking and blowing
Method used
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Embodiment 1
[0014] A water supply pump control device provided in this embodiment, its circuit diagram is as follows figure 1 As shown, it includes a manual contactor KM2, an automatic contactor KM1 and a transfer switch SA1, and the manual contactor is connected with the automatic contactor through a transfer switch to form an automatic control circuit and a manual control circuit.
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The invention relates to a water supply pump control device, which comprises a manual contactor KM2, an automatic contactor KM1 and a change-over switch SA1, wherein the manual contactor is connected with the automatic contactor through the change-over switch to form an automatic control circuit and a manual control circuit, the automatic control circuit comprises the manual contactor KM2, the automatic contactor KM1, a manual stopping button SB1 and a manual starting button SB2, and the manual contactor KM2 is serially connected with the automatic contactor KM1, the manual stopping button and the change-over switch SA1 after being connected with the manual starting button SB2 in parallel; and the manual control circuit comprises the automatic contactor KM1 and the manual contactor KM2, which are serially connected with the change-over switch SA1. The water pump can be prevented from being abnormally started and stopped under abnormal situation such as interruption of communication, and the normal production of steelmaking can be guaranteed; and moreover, the water supply pump control device is simple in structure, convenient to assemble and strong in adaptability.
Description
technical field [0001] The invention relates to a manual-automatic switching device, in particular to a water supply pump control device. Background technique [0002] The water supply pump for evaporative cooling water in the pump room is designed with Siemens S120 series inverters, and communicates with the PLC through the Profibus protocol. However, in terms of water pump control, the water pump can only be controlled on the WinCC screen, and the water pump cannot be controlled locally. Carry out start-stop control. Once there is an abnormal situation such as communication interruption, the water pump cannot be started and stopped normally, and the water pump that is running normally will also stop the pump suddenly, which will cause a great safety hazard during steelmaking and blowing. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a water supply pump control d...
Claims
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IPC IPC(8): F04B49/06
Inventor 华新灵任晓健周艳黄海滨
Owner JIANGSU LIANFENG IND EQUIP TECH CO LTD