Constant flow control device of pipe waste water

Abstract

The invention discloses a constant current control device for waste water in pipes, comprising a pressure transformer, a computer, a frequency converter, a waste water lift pump and a waste water pipeline, wherein the pressure sensor probes of the pressure transformer are inserted into the waste water pipeline, the input of the pressure transformer is connected with a power supply while two signal outputs are respectively connected with the input of a computer I / O port and the common end of the I / O port, the frequency setting voltage input of the frequency converter is connected with the analogue output of the computer I / O port, the analogue signal input common end of the frequency converter is connected with the common end of the computer I / O port, the output of the frequency converter is connected with the power end of the motor of the waste water lift pump, the water outlet of the waste water lift pump is connected with the water inlet of the waste water pipeline. The device has simple adjustment, measurement and maintenance and low cost, is not limited by the shapes and diameters of pipelines and can quickly and effectively control the current of waste water in the pipeline constant.

Description

technical field [0001] The invention relates to a constant flow control device for pipeline wastewater. Background technique [0002] Wastewater treatment PH value control system, because the control signal is directly affected by the change of pH value and flow rate of the wastewater stock solution, if the conventional decoupling method is used to maintain the constant flow of wastewater in the pipeline, the control system will become complicated and difficult. The device for keeping the waste water flow in the pipeline constant uses the change of the flow signal in the pipeline measured by the flowmeter as the control signal, so as to change the control and adjustment of the controller to the related devices and realize the constant waste water flow in the pipeline. The conventional flow meter is used to measure the flow in the pipeline, and the adjustment drift is large and the accuracy is poor. Especially in complex pipelines (inner diameter changes), it is not easy to d...

AI Technical Summary

Problems solved by technology

Conventional flowmeters are used to measure the flow in pipelines, and the adjustment drift is large and the accuracy is poor. Especially in complex pipelines (inner diameter changes), it is not easy to directly measure the flow of wastewater in the pipeline. Many factors can make it difficult to guarantee the measurement accuracy of the flowmeter.

Although the accuracy of many flowmeters is good, such as electromagnetic flowmeters, the installation location is strictly required, and the actual use of the project is limited by the installation conditions, and the price is expensive.

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