Unmanned intelligent filling and metering control method for PVC powder

Abstract

The invention discloses an unmanned intelligent filling and metering control method for PVC powder. Eight system modules of an information collection system, an incoming identification system, a filling identification initial mining system, a wagon balance metering initial mining system, a filling identification terminal mining system, a filling and metering system, a wagon balance metering finalmining system and a metering verification system are included, operation is conducted according to sequential steps, information collecting is conducted in advance through the information collection system, the incoming identification system identifies judgement, filling task judgement and identification are conducted through the filling identification initial mining system, vehicle information iscollected through the wagon balance metering initial mining system, after filling is conducted through the filling and metering system, the wagon balance metering final mining system is entered, themetering verification system conducts deviation comparison on a difference value of the weight obtained after filling and the net weight obtained before filling, and whether the result is qualified ornot is judged. Accordingly, the purpose of secondary verification of PVC powder filling and metering is achieved, and precision and reliability are achieved; meanwhile, operation is convenient, real-time regulation can be achieved, and ideal production is facilitated, and the purpose of unmanned intelligent filling and metering control is achieved.

Description

technical field [0001] The invention relates to a PVC powder filling measurement control method in the field of automation control, in particular to an unattended intelligent filling measurement control method for PVC powder. Background technique [0002] At present, some large-scale polyvinyl chloride chemical production enterprises in China mostly use silo pumps or silos as intermediate transfer storage containers for PVC powder, and mostly use special vehicles for tank tanks to deliver PVC powder SG5, SG7, and SG8 types that are relatively close to each other. During the filling process, due to the high operation requirements, the requirements for the degree of automation of the packaging are becoming more and more strict, in order to reduce the occurrence of unsafe factors. Some enterprises currently use semi-automatic mode, and the degree of automation is not very high. Both need to be rechecked by manual operation and measurement, because PVC powder is harmful to a cer...

AI Technical Summary

Problems solved by technology

[0002] At present, some domestic large-scale polyvinyl chloride chemical production enterprises mostly use silo pumps or silos as intermediate transfer storage containers for PVC powder, and mostly use special vehicles for tank tanks to deliver PVC powder SG5, SG7, and SG8 types with relatively short distances. During the filling process, due to the high operation requirements, the requirements for the degree of automation of the packaging are becoming more and more strict, in order to reduce the occurrence of unsafe factors. Some enterprises currently use semi-automatic mode, the degree of automation is not very high, and the filling and measurement aspects Both need to be rechecked by manual operation and measurement, because PVC powder is harmful to a certain extent, and splashes often occur around the tanker during the filling process, causing hazards and unsafe hidden dangers to the surrounding environment, the vehicle itself and personnel operations

Generally, operators are required to operate strictly during the PVC powder filling process and are not allowed to leave their posts. Most of the special vehicles for filling tanks are filled outdoors. In the colder winter season, due to the large fog, the liquid Key indicators such as position and pressure are difficult to observe in winter or at night, and there are serious safety hazards. In addition, when the automated industrial control system fails to strictly control the relevant process indicators according to the preset control, if the flowmeter is not working properly, Operators mostly judge, operate or estimate the operation of automatic control valves based on actual operating experience. Not only is it difficult to achieve ideal production conditions, but it is also difficult to achieve the expected optimal state of product filling and metering control, which affects product output and metering. Moreover, in order to operate safely, the operator still needs to monitor the whole process, and the loading needs to be reviewed by two people, which is labor-intensive.

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