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Low-load type cut-off butterfly valve

A low-load, butterfly valve technology, applied in the field of low-load cut-off butterfly valves, low-load cut-off butterfly valves, can solve the problems of low-load butterfly valves, such as large leakage, inability to withstand high temperatures, and high manufacturing costs, to achieve good sealing stability and extended The effect of service life, good sealing performance

Inactive Publication Date: 2013-04-03
WUXI SMART AUTO CONTROL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing technology, the existing low-load butterfly valve has a large leakage, which cannot meet the requirements of the working conditions for the leakage level
Double eccentric butterfly valves or triple eccentric butterfly valves use built-in bushings as guide bearings, which cannot withstand high temperatures, materials are easily stuck, and the manufacturing cost is high, which is not conducive to customer choice

Method used

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  • Low-load type cut-off butterfly valve
  • Low-load type cut-off butterfly valve
  • Low-load type cut-off butterfly valve

Examples

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Effect test

Embodiment Construction

[0017] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0018] Such as Figure 1 ~ Figure 3 As shown, including valve stem 1, bearing with square seat 2, hexagon socket bolt 3, nut 4, upper bearing seat 5, valve body 6, valve plate 7, direct pin 8, lower bearing seat 9, lock nut 10, screw rod 11 , packing plate 12, packing gland 13, packing assembly 14, packing pad 15, valve seat 16, driven shaft 17, first shaft hole 18, second shaft hole 19, stuffing box 20, first sleeve 21, second Two sleeves 22, flanges 23 and the like.

[0019] Such as Figure 1 ~ Figure 3 As shown, the present invention is a low-load cut-off butterfly valve. The valve plate 7 is installed in the valve body 6. The valve body 6 includes a first sleeve 21 and a second sleeve 22 with a stuffing box 20. The stuffing box 20 A packing assembly 14 is arranged inside, and a packing pressing plate 12 is arranged on the outside of t...

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PUM

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Abstract

The invention relates to a low-load type cut-off butterfly valve, in particular to a low-load cut-off butterfly valve which is developed for working conditions that the nominal pressure is low and cutting off is required, and belongs to the field of fluid control valves. A valve plate is mounted in a valve body; the valve body comprises sleeves provided with stuffing boxes, a stuffing component is arranged in each stuffing box, filler pressure plates are arranged on the outer side of the stuffing components, and the filler pressure plates are fixed at the end parts of a first sleeve and a second sleeve through screw rods and lock nuts; a first shaft hole and a second shaft hole are formed on the valve body, wherein the first shaft hole and the second shaft hole penetrate the first sleeve and the second sleeve respectively, a valve rod is arranged in the first shaft hole, and a driven shaft is arranged in the second shaft hole; a valve seat is arranged in the inner chamber of the valve body; the upper end and the lower end of the valve plate are in rotational connection with the valve rod and the driven shaft respectively; the valve seat is embedded in the inner chamber of the valve body to form a certain angle; the valve plate is an integral part with a triple eccentric structure; and when at open and middle positions, the valve seat is not in contact with the valve plate and dose not interfere with the valve plate.

Description

technical field [0001] The invention relates to a low-load cut-off butterfly valve, in particular to a low-load cut-off butterfly valve developed for working conditions where the nominal pressure is low and cut-off is required, and belongs to the field of fluid control valves. Background technique [0002] With the development of the economy, the level of industrial automation control is constantly improving, so the requirements for the reliability and economy of the control valve in the process control are also constantly improving. This also puts forward higher requirements on the structure of the valve body. In the prior art, the existing low-load butterfly valve has a large leakage, which cannot meet the requirements of the working conditions on the leakage level. Double eccentric butterfly valves or triple eccentric butterfly valves use built-in bushings as guide bearings, which cannot withstand high temperatures, and materials are easily stuck, and the manufacturing c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/22F16K1/226F16K1/48F16K27/10F16K41/02
Inventor 陈彦许义兵闵玉苹史强修孙迟月
Owner WUXI SMART AUTO CONTROL ENG CO LTD
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