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Constant-pressure variable circular water supply control system

A technology of constant pressure variable and control system, applied in water supply pipeline systems, water supply devices, water supply devices, etc., can solve problems such as waste and energy consumption, and achieve the effect of improving adjustment time, improving work efficiency, and realizing full automation.

Active Publication Date: 2016-09-28
安徽恒远自动化仪表有限公司
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AI Technical Summary

Problems solved by technology

In the traditional boiler water supply system, the feedwater pump runs continuously under the drive of the industrial frequency power supply, and the pressure of the feedwater is adjusted by adjusting the opening of the outlet valve. A large amount of energy is wasted in the outlet valve.

Method used

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  • Constant-pressure variable circular water supply control system

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Embodiment Construction

[0019] refer to figure 1 , The present invention proposes a constant pressure variable circulation water supply control system, including a plurality of water pumps 1, a frequency conversion control unit 2, a power frequency control unit 3, a water supply controller 4 and a water pressure detection device. The water pressure detection device is used to detect the water pressure in the water pipe in real time, and the water pump 1 is used to provide power to the water flow in the water pipe. In this embodiment, the water pump 1 is a centrifugal pump, and the water supply controller 4 is a PID controller (Proportion Integration Differentiation, proportional-integral-differential controller). The water supply controller 4 is connected to the frequency conversion control unit 2 and the power frequency control unit 3 , and the frequency conversion control unit 2 and the power frequency control unit 3 are respectively connected to each water pump 1 .

[0020] Each water pump 1 has ...

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Abstract

The invention discloses a constant-pressure variable circular water supply control system. The constant-pressure variable circular water supply control system comprises a plurality of water pumps, a frequency converting control unit, a power frequency control unit, a water supply controller and a water pressure detection device. The frequency converting control unit controls the real-time-adjusted water pump in real time according to results of comparison of detection values of the water pressure detection device with water pressure threshold values, and the water supply controller controls work of the frequency converting control unit and the power frequency control unit according to results of comparison of the output power of the current real-time-adjusted water pump with preset upper limit power and preset lower limit power. In this way, full automation of water supply control is achieved, the logic complexity degree of the whole control system is lowered by controlling the number of the water pumps in a frequency converting controlled state, fault detection is carried out easily, and the stability of work of the system is guaranteed.

Description

technical field [0001] The invention relates to the technical field of constant pressure water supply, in particular to a constant pressure variable circulation water supply control system. Background technique [0002] Frequency conversion constant pressure water supply adopts a low-cost one-drag multi-control method to realize closed-loop regulation and control of constant pressure water supply. Frequency conversion constant pressure water supply can be widely used in industrial production water constant pressure control. In the traditional boiler water supply system, the feedwater pump runs continuously under the drive of the power frequency power supply, and the pressure of the feedwater is adjusted by adjusting the opening of the outlet valve. A large amount of energy is wasted in the outlet valve. By adopting frequency conversion speed regulation and constant pressure control, water supply can follow the water consumption within the set pressure, avoiding the loss of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E03B1/02E03B7/07
CPCE03B1/02E03B7/071E03B7/075
Inventor 李树山
Owner 安徽恒远自动化仪表有限公司
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