Control system of one-frequency one-pump constant pressure water supply equipment

A constant-pressure water supply and control system technology, applied in the water supply pipeline system, water supply equipment, water supply main pipeline, etc., can solve the problems of motor damage, failure site can only stop water, equipment water supply pressure can not be smoothly transitioned, etc., to achieve a simple system Reliable, safe water supply, and rich protection functions

CN102465547AInactive Publication Date: 2012-05-23重庆成峰水务工程有限责任公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2012-05-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a one-frequency one-pump constant pressure water supply control system, which comprises a control unit (6) for controlling the operation of the system and controlling the output frequencies of frequency converters, a human-machine interface (7) for setting parameters of the system and monitoring operational data, the frequency converters (5a, 5b and 5c) for controlling the rotating speeds of water pump motors, and sensing instrument units (1, 3 and 4) connected with the control unit and used for acquiring external feedback information, wherein according to the control system, water pumps (2a, 2b and 2c) in a controlled pump group are matched with the frequency converters and controlled by adopting a common-frequency and common-speed control technology to implement constant pressure water supply.
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Description

technical field

[0001] The invention belongs to the technical field of water supply and control, and specifically refers to a one-frequency-one-pump constant-pressure water supply equipment control system. Background technique

[0002] With the development of frequency conversion technology, using frequency conversion to realize constant pressure water supply has become a trend of urban water supply. In the traditional constant pressure water supply equipment, a frequency converter controls the constant pressure water supply system of multi-pump circulation, which is very popular in electrical design. Its control mode is one control two, one control three, ..., one control n (n is the number of water pumps), referred to as one control multiple control mode. Specifically, it means that the traditional constant pressure water supply equipment control system only includes one frequency converter, and the water pumps controlled by the control system, depending on the water supp...

Examples

Embodiment Construction

[0029] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0030] Such as figure 2 As shown, the present invention is a constant pressure water supply equipment control system adopting one-frequency-one-pump control technology. The cabinet is provided with a frequency converter 5, a control unit 6 and a man-machine interface 7.

[0031] The control unit 6 includes a microcomputer controller 8, wherein the microcomputer controller can be a PLC or a single-chip microcomputer.

[0032] The control unit 6 includes an A / D conversion module 9 and a D / A conversion module 10. The A / D conversion module 9 is connected to the water outlet pressure sensor instrument 3 to sample the water outlet pressure signal. The microcomputer controller 8 reads the A / D conversion module The pressure data of 9 is used as the pressure feedback signal, and the PID calculation is performed with the set target p...