Direct liquid level controlling system with single-loop pump

A variable frequency water pump, level control technology, applied in liquid level control, control/regulation system, non-electric variable control and other directions, can solve problems such as increasing project cost and operating cost
CN1399177AInactive Publication Date: 2003-02-26天津市科华达科技有限公司
0 Cites 4 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
天津市科华达科技有限公司
Publication Date
2003-02-26
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The water reservoir, water pump, sealed container and user are contained via pipeline. The liquid level controlling system consists of container level loop, control level loop, container level detecting circuit, control level detecting circuit, information processing control circuit, on-off control circuit and the water pump. Via simple signal conversion, water pump motor rotation speed, instead of regulating valve, is regulated and this has high control sensitivity, less measurement lagging, and high control precision. The present invention can be used widely in water tower, industry boiler water supply, etc.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a liquid level control system, in particular to a direct liquid level level control system of a single-loop frequency conversion water pump. Background technique

[0002] At present, the water supply system at home and abroad is completed by a frequency conversion pump constant pressure control system and a liquid level control system. The general frequency conversion water pump constant pressure control system is composed of a pressure sensor transmitter (to measure the outlet pressure of the water pump), a digital regulator, and a frequency conversion water pump (executive agency) to form a constant pressure control system. The liquid level control system is composed of a differential pressure transmitter (to measure the liquid level length), a digital regulator and a regulating valve to form a liquid level control system.

[0003] In terms of control, the water supply system has defects such as measurement hysteresis, low s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More