Two-control multi-constant-pressure water supply equipment control system and control method thereof

A technology of equipment control and constant pressure water supply, applied in the water supply pipeline system, water supply device, water supply main pipeline, etc., can solve the problems such as the inability to achieve a smooth transition of the water supply pressure, reduce the operating efficiency of the pump set, and avoid the impact of the water supply pressure. Water hammer effect, improved service life, stable water supply pressure

Active Publication Date: 2012-02-22
重庆成峰水务工程有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 2. The impact on the water outlet pressure: when increasing or decreasing the power frequency pump, the water supply pressure of the equipment cannot achieve a smooth transition. When increasing the power frequency pump, it will inevitably cause an impact on the water supply pressure
[0009] 3. Impact on water safety: Because the system has only one frequency converter, if the frequency converter fails

Method used

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  • Two-control multi-constant-pressure water supply equipment control system and control method thereof
  • Two-control multi-constant-pressure water supply equipment control system and control method thereof
  • Two-control multi-constant-pressure water supply equipment control system and control method thereof

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Example Embodiment

[0061] Examples:

[0062] See figure 2 (FR1, FR2, and FR3 in the figure are thermal relay protection devices), take the start and stop process of three water pumps as an example:

[0063] When the system just starts to run, turn on the No. 5b inverter 5 and turn off the No. 5c inverter 5. At the same time, turn on the No. 2b water pump 2 in variable frequency mode (the first contactor 7 on the No. 2b water pump 2 is sucked in, and the second contact is Device 8 is disconnected) connected to the system, and the rest of the water pump 2 is not connected; within the pressure range that a water pump 2 can provide, the No. 5b frequency converter 5 drives the No. 2b water pump 2 for frequency conversion operation, and the control unit 6 directs according to the water pressure data. No. 5b inverter 5 dynamically outputs control signals;

[0064] As the water consumption increases, the control unit 6 according to the preset threshold (the threshold will be delayed for a certain time), bef...

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Abstract

The invention discloses a water supply equipment control system. The system comprises a plurality of water pumps, two frequency converters, a control unit, a switching group and a water pressure sensor; the control ends of the two frequency converters are connected to the control unit, and the output ends of the two frequency converters are connected to a node A; the input end of each water pump is connected with the switching group, and the switching group is respectively connected with the control unit and the node A; the control unit controls the operation of the switching group; the switching group controls conduction or cut-off of the input ends of the water pumps and the node A; and the water pressure sensor is connected with the control unit and used for detecting the water outlet pressure of a water using point. The invention also discloses a control method of the water supply equipment control system. The system has the advantages of realizing soft start and soft stop of the water pumps, eliminating the impact current when the water pumps are started, avoiding water hammer effect, stabilizing the water supply pressure, prolonging the service life and the reliability of the equipment and better ensuring the water using safety of a user.

Description

technical field [0001] The invention relates to a water supply equipment control system and a control method thereof, in particular to a two-control multi-constant-pressure water supply equipment control system and a control method thereof. Background technique [0002] Among the existing constant-pressure water supply equipment, there is a technology that uses a frequency converter to control multi-pump circulating constant-pressure water supply. The electrical design of the system is very mature, and its control methods are one control two, one control three, ..., one control n ( n is the number of water pumps), referred to as "one control many". Its notable feature is that the control system only includes one frequency converter, and the number of water pumps controlled by it depends on the water supply scale and capacity of the water supply equipment. Usually there are two, three or more water pumps. [0003] One-control-multiple-control mode usually adopts the followin...

Claims

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Application Information

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IPC IPC(8): E03B11/16E03B7/07
Inventor 杨勇陈沛中
Owner 重庆成峰水务工程有限责任公司
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