Wind speed balance method and unit control device of wire feeding pipe of cigarette making machine

Abstract

The invention discloses a wire feeding pipe wind speed balance method of a cigarette making machine and a unit control device. The unit control device is mounted on a wind return pipe of the cigarette making machine, and is formed to a closed control loop with a wire pipe wind speed flow meter originally mounted on a wire feeding pipe of the cigarette making machine; the wire feeding pipe is connected with a wind inlet of a wire sucking hopper on the cigarette making machine; the wind return pipe is connected with a wind outlet of the wire sucking hopper; single cigarette making machine serves as a control unit to directly acquire the wind speed of the wire feeding pipe and the wind speed of the wind return pipe; the wind speed of the wire feeding pipe serves as a feedback signal of PID closed-loop control; and the unit control device is adopted to directly control the wind speed of the wire feeding pipe so as to realize precise control of wind balance in wind power wire feeding of the cigarette making machine. The unit control device obtains a working power supply from the cigarette making machine, can independently work, and can be networked to a central control unit or an upper computer to realize the functions of centralized data acquisition and remote monitoring.

Description

technical field [0001] The invention relates to the technical field of pipeline wind conveying, in particular to a method and a unit control device for realizing wind speed balance of a wire feeding pipe of a cigarette machine. Background technique [0002] At present, the application of cigarette machine wind wire feeding system in cigarette factories has occupied an absolute dominant position. The wind power wire feeding system is composed of fan, dust collector, pipe network, wire feeding machine, wind balance equipment and multiple cigarette machines. The wind balance equipment is the key equipment for the wind balance and stable control of the wind speed in the wind wire feeding system of the cigarette machine. It adopts real-time detection and wind balance measures for the wind speed of the return air pipe of the cigarette machine to realize the stable control of the conveying speed of shredded tobacco and reduce the shredded tobacco. Purpose. [0003] The air force b...

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Problems solved by technology

[0004] The current wind balance method uses the wind speed of the return air pipe as the object of process control, which belongs to the indirect realization of the stability of the wind speed in the wire feeding pipe. It has the following shortcomings: 1) Due to the existence of air leakage in the suction hopper of the cigarette machine and the randomness of the air leakage rate, in fact The stability of the wind speed control of the wire feeding pipe is not real; 2) Due to the slow execution of the electric control valve, its slow characteristics lead to a lag in the response of the wind speed adjustment and low control accuracy; 3) Since the distributed I / O control system is based on the bus network , The safe wire feeding and wind speed stability of the cigarette making machine have extremely high requirements on the stability of the network, and the independence and stability are insufficient

Therefore, the current wind balance method cannot meet the fine control requirements of the wind balance of the wind wire feeding system of the cigarette machine

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