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Butterfly valve with adjustable inner bypass self

A butterfly valve with its own technology, applied in the direction of lift valve, valve details, valve device, etc., can solve the problems of valve body vibration, poor flow regulation performance, noise, etc., and achieve the effect of simple device structure and reliable performance.

Pending Publication Date: 2019-05-21
SHANGHAI POWER EQUIP RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the linearity of the flow regulation characteristics of common butterfly valve products is relatively good at medium openings (30% to 70%), but at some small or large openings, the flow regulation performance is poor, accompanied by There are also vibration and noise problems of the valve body
Therefore, the existing butterfly valve products cannot meet the requirements of the above application conditions

Method used

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  • Butterfly valve with adjustable inner bypass self
  • Butterfly valve with adjustable inner bypass self
  • Butterfly valve with adjustable inner bypass self

Examples

Experimental program
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Effect test

Embodiment Construction

[0031] Below in conjunction with specific embodiment, further illustrate the present invention.

[0032] figure 1 A schematic diagram of a butterfly valve with an adjustable internal bypass provided for this embodiment. The butterfly valve with an adjustable internal bypass includes a butterfly valve body. B 5 Two areas, and the butterfly valve body is cast in one piece. The chamber A 4 in the valve body is a large circular structure with a concave lower end, and the chamber B 5 in the valve body is a small circle structure, and the chamber B 5 in the valve body is located in the concave portion of the lower end of the chamber A 4 in the valve body.

[0033] The valve seat of chamber A 4 in the valve body is matched with butterfly plate A 8, and the valve seat of chamber B 5 in the valve body is matched with butterfly plate B 9, butterfly plate A 8 is connected to valve stem A 6, and butterfly plate B 9 is connected to the valve Rod B 7, valve rod A 6, and valve rod B 7 are ...

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Abstract

The invention provides a butterfly valve with an adjustable inner bypass self. The butterfly valve comprises a butterfly valve body; the interior of the butterfly valve body is divided into two regions including a valve body inner cavity A and a valve body inner cavity B; a valve seat of the valve body inner cavity A is provided with a butterfly plate A in a matching manner; a valve seat of the valve body inner cavity B is provided with a butterfly plate B in the matching manner; the butterfly plate A is connected with a valve rod A; the butterfly plate B is connected with a valve rod B; the valve rod A and the valve rod B are arranged in a nested manner; and the valve rod A rotates in the valve rod B to realize adjustment of an opening degree of the butterfly valve. For a provided novel butterfly valve structure with the inner bypass adjusting characteristic self, a special valve rod form is controlled through two different sets of executing mechanisms, and flow linear adjustment of the butterfly valve under a small opening degree can be realized. The device is simple in structure and reliable in performance and is suitable for wide-range popularization and use.

Description

technical field [0001] The invention relates to a butterfly valve, in particular to a butterfly valve with an adjustable internal bypass, which belongs to the technical field of fluid control valves. Background technique [0002] With the progress and development of society and the continuous improvement of industrial control technology, the application requirements and function realization of valves used in some special occasions have also become diversified. [0003] For the transformation of medium and low pressure connecting pipes implemented in the heating transformation of the power plant in recent years by removing the low pressure cylinder, it is necessary to install a control steam inlet valve at the key medium discharge outlet or the inlet of the low pressure cylinder. Because the linearity of the flow regulation characteristics of common butterfly valve products is relatively good at medium openings (30% to 70%), but at some small or large openings, the flow regul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/22F16K1/32F16K27/02F16K1/54
Inventor 杨宇程云李连胜林润达范雪飞王天中王勇郭涛江路毅曹兰敏徐佳敏申新峰邓志成王骐杨春旺
Owner SHANGHAI POWER EQUIP RES INST
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