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V-shaped spherical valve and flow characteristic curve obtaining method thereof

A technology of flow characteristics and ball valves, which is applied to valve devices, cocks including cut-off devices, mechanical equipment, etc., and can solve problems such as poor adjustment performance

Active Publication Date: 2020-10-27
SUFA TECH IND CNNC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • V-shaped spherical valve and flow characteristic curve obtaining method thereof
  • V-shaped spherical valve and flow characteristic curve obtaining method thereof
  • V-shaped spherical valve and flow characteristic curve obtaining method thereof

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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 spherical valve and a flow characteristic curve obtaining method thereof. Flow resistance of the V-shaped spherical valve is smaller, and a flow coefficient of the valve and a circulating area are nearly in a direct proportion relationship, and therefore, circulating ability of the valve can be analyzed by calculating the circulating area of the V-shaped spherical valve. Through a special valve element structure of the valve, the V-shaped spherical valve has excellent regulation performance during small opening degree and large opening degree, and has a greater adjustable ratio. V-shaped notch is formed while the opening degree of the spherical valve is small, so that the spherical valve has better regulation performance at the small opening degree; at medium opening degree, a runner of the V-shaped spherical valve is fan-shaped, and circulating area is completely increased along with increase of opening degree; and at greater opening degree, the runner is in the shape of a sector and a rectangle, and circulating area is smaller in speed-change change along with increase of the opening degree, so that regulation performance of the spherical valveis guaranteed.

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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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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