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Precision control system for aperture of large ball valve

A precise control, ball valve technology, applied in valve details, valve device, valve operation/release device, etc., to achieve the effect of easy control, accurate control of overcurrent flow, and simple structure

Active Publication Date: 2019-02-05
OCEAN RES CENT OF ZHOUSHAN ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional electric and pneumatic driving devices have been difficult to meet the above application requirements, and research on proportional control for large valves and high-torque driving devices has attracted more and more attention.

Method used

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  • Precision control system for aperture of large ball valve

Examples

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Embodiment Construction

[0020] The following is attached figure 1 The present invention will be further explained.

[0021] This embodiment includes a potentiometer 1, an A amplifier 4, a three-position three-way solenoid valve 11, a hydraulic cylinder 13, a fork mechanism 14 and an angular displacement sensor 17.

[0022] One end of the potentiometer 1 is grounded, and the other end is connected to +V, which is used to detect the rotation angle of the valve stem 15 of the ball valve 16.

[0023] The input of the A amplifier 4 is the voltage U of the sliding contact of the potentiometer 1 a , A amplifier 4 output U b1 To the input terminal of A voltage comparator 5, the output of A amplifier 4 is through the resistance R 1 3. Resistance R 2 U generated by 2 partial pressure b2 To the input terminal of B voltage comparator 6. The other input terminal of the A voltage comparator and the other input terminal of the B voltage comparator are both connected to the command voltage U i , U i Is the command volta...

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PUM

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Abstract

The invention discloses a precision control system for aperture of a large ball valve. The precision control system disclosed by the invention comprises a potentiometer, an A amplifier, a three-position tee electromagnetic valve, a hydraulic cylinder, a shift fork mechanism and an angular displacement sensor, wherein the potentiometer is used to detect a rotation angle of a valve rod of the ball valve; a piston rod in the hydraulic cylinder can be moved back and forth horizontally so as to drive motion of the shift fork mechanism and then the shift fork mechanism drives rotation of the valve rod of the ball valve, so the aperture of the ball valve can decrease or increase; input of the A amplifier is generated from the potentiometer and enters two comparators respectively after voltage distribution; and through comparison with the size of a command voltage, the state of the three-position tee electromagnetic valve can be determined and thus actions of the hydraulic cylinder can be controlled. The system disclosed by the invention is characterized by the simple structure, reliable performance, low cost and easy control

Description

Technical field [0001] The invention belongs to the field of electromechanical equipment, and specifically relates to a large-scale ball valve opening precision control system. Background technique [0002] The petrochemical industry is an important pillar industry and basic industry of the national economy. The petrochemical industry is funded, resource-intensive, and technology-intensive, with a wide range of product applications, a high degree of industrial relevance, and a large economic aggregate. It plays a very important role in the national economy. [0003] my country's petrochemical industry is developing in the direction of large-scale, large-scale and internationalization, and will maintain sustainable development in the next five years. Dozens of sets of 10 million-ton-class oil refining plants and mega-tonne-class ethylene plants will be built and expanded, opening up a broad market for petrochemical valve demand. In addition, the various types of pump valves current...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K31/04F16K31/122
CPCF16K31/041F16K31/122
Inventor 蔡勇刘硕沈莹杰林王林姜凯友丁凡
Owner OCEAN RES CENT OF ZHOUSHAN ZHEJIANG UNIV
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