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A V-shaped ball valve and its flow characteristic curve obtaining method

A technology of flow characteristics and ball valves, which is applied to valve devices, cocks including cut-off devices, mechanical equipment, etc., can solve problems such as poor adjustment performance, achieve large adjustable ratio, excellent adjustment performance, and save manpower and material costs.

Active Publication Date: 2021-12-24
SUFA TECH IND CNNC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to improve the phenomenon that the traditional V-type ball valve has poor adjustment performance when the opening is large, and propose a V-type ball valve

Method used

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  • A V-shaped ball valve and its flow characteristic curve obtaining method
  • A V-shaped ball valve and its flow characteristic curve obtaining method
  • A V-shaped ball valve and its flow characteristic curve obtaining method

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Embodiment Construction

[0071] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0072] The invention relates to a V-shaped ball valve. The V-shaped ball valve has good adjustment performance under large opening and small opening, and has a high adjustable ratio. The traditional V-type ball valve is an angle-turn regulating valve, and the tower is formed by opening a V-shaped opening on the ball. During the rotation of the ball, the V-shaped opening of the ball and the flow channel of the valve seat form a fan-shaped effective flow channel. During the rotation process, the cross-sectional area of ​​the effective flow channel can be changed to form a precise adjustment of the medium.

[0073] Such as figure 1 As shown, in the V-type ball valve provided by the present invention, the spool opening of the V-type ball valve consists of three continuous sections. Among them, the first section of the valve core flow channel is a...

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Abstract

The invention discloses a V-shaped ball valve and a method for obtaining its flow characteristic curve. Since the flow resistance of the V-type ball valve is small, the flow coefficient of the valve is approximately proportional to the flow area, so the flow capacity of the valve can be analyzed by calculating the flow area of ​​the V-type ball valve. The special spool structure of the valve makes the V-type ball valve have excellent adjustment performance in small opening and large opening, and has a large adjustable ratio. The ball valve is equipped with a V-shaped notch when the opening is small, so that the ball valve has better adjustment performance when the opening is small; when the opening is medium, the flow channel is fan-shaped, and the flow area will be close to that of the valve with the increase of the opening. Equal percentage increase; when the opening is large, the flow channel is a combination of sector and rectangle, and the flow area changes slightly with the increase of the opening, which ensures the adjustment performance of the ball valve.

Description

technical field [0001] The invention belongs to the field of valves, in particular to a V-shaped ball valve with special flow characteristics based on a valve core structure. Background technique [0002] V-type ball valve has the characteristics of high adjustable ratio, small flow resistance, simple structure and easy maintenance, and is widely used in power stations, petroleum, chemical industry and other occasions that require high adjustable ratio. The flow characteristic curve of the traditional V-type ball valve is close to equal percentage, and the slope of the flow characteristic curve increases with the opening degree. Therefore, it has better regulation performance at small openings, but at large openings, its flow coefficient is very sensitive to the opening, resulting in reduced regulation performance. Therefore, when the V-type ball valve is used as a regulating valve, in order to ensure its control accuracy, its rated maximum flow coefficient often has a larg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K5/06F16K5/08F16K37/00
CPCF16K5/06F16K5/08F16K37/00
Inventor 吴辉杨佳明高志新金志江钱锦远
Owner SUFA TECH IND CNNC
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