Method for controlling regulating valve by control system when throttling flowmeter is in dead zone

• Main Authors: BAO XINQUN, ZHAO JINGSONG, LIU GANG, FAN QIANBO, ZHENG YI, YE CHUNLEI, SHI XIAOMING, LIU YONG, ZHAO ZHOUPING, LEI ZHIJIE
• Format: Patent
• Language: Chinese; English
• Published: 04.01.2022
• Subjects: BLASTING; DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE; FURNACES; HEATING; KILNS; LIGHTING; MECHANICAL ENGINEERING; OVENS; RETORTS; WEAPONS

The invention discloses a method for controlling a regulating valve by a control system when a throttling flowmeter is in a dead zone. The method comprises the following steps: S1, a critical opening value of the regulating valve is detected, and when the opening of the regulating valve is less than or equal to the critical opening value, the throttling flowmeter is in the dead zone; S2, the opening degree of the regulating valve is gradually reduced from the critical opening degree value, and the corresponding flow values of the regulating valve at different opening degrees are measured through a handheld flowmeter; S3, the relation between the opening degrees of the regulating valve and the corresponding flow values is established from the critical opening degree value; and S4, the relation is input into the control system, and when the opening degree of the regulating valve is less than or equal to the critical opening degree value, the control system controls the regulating valve according to the relation