Spheroidal graphite cast pipe position detection and proportional valve control automatic protection system and method

Abstract

The invention discloses a spheroidal graphite cast pipe position detection and proportional valve control automatic protection system and method. The spheroidal graphite cast pipe position detection and proportional valve control automatic protection system comprises a centrifugal machine system, a pipe drawing tongs system and a ladle turning system, wherein the centrifugal machine system, the pipe drawing tongs system and the ladle turning system each comprise a position detection system and a proportional valve control system, and code disc crash, number hopping, number exceeding, damage and line faults in the detection system and jamming, number exceeding and internal leakage faults in the proportional valve are automatically judged and processed, so that corresponding automatic protection for the fault problems is realized. The spheroidal graphite cast pipe position detection and proportional valve control automatic protection system has a good protection effect on control related to position and speed such as code disc line faults, code disc faults and proportional valve out-of-control, and the effect is obvious.

Description

technical field [0001] The invention relates to an automatic protection system and method for position detection and proportional valve control of a nodular cast pipe. Background technique [0002] In the production of ductile graphite pipe, the operation of centrifuge, extubation forceps, turning bag and other systems all need to use the position inspection encoder to cooperate with the proportional valve to meet the requirements of precise control. The proportional valve cooperates with the encoder to coordinate work according to different positions, including: [0003] Centrifuge system: The speed of the proportional valve is divided into more than ten sections through the feedback position of the centrifuge encoder to ensure the control requirements of the wall thickness of the cast pipe. [0004] Pulling forceps system: Judging by the position encoder that the pulling head enters the centrifuge socket, opens the pulling claws, and then slowly retreats to pull out the t...

AI Technical Summary

Problems solved by technology

[0006] It can be seen from the above three systems that all precise control is inseparable from position detection and proportional valve speed change. During this process, if the code disc is short-circuited or open-circuited, or the proportional valve is stuck, it will lead to quality accidents and waste products; If it is serious, it will cause equipment damage and even endanger the life of the operator.

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