Upper-detachable breakdown structure of three-eccentric-butterfly-valve

A triple-eccentric butterfly valve, eccentricity technology, applied in the direction of the valve shell structure, lift valve, valve details, etc., can solve problems such as difficult maintenance, long maintenance time, and restrictions on the popularization and use of butterfly valves

Active Publication Date: 2010-06-09
MINGZHU VALVE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This inherent structure not only brings the defects of difficult maintenance and relatively long m...

Method used

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  • Upper-detachable breakdown structure of three-eccentric-butterfly-valve
  • Upper-detachable breakdown structure of three-eccentric-butterfly-valve
  • Upper-detachable breakdown structure of three-eccentric-butterfly-valve

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Embodiment Construction

[0012] As shown in the figure, this kind of three-eccentric butterfly valve can be disassembled and disassembled, including four-way tubular valve body 1, valve cover 7, valve stem 17, butterfly plate 5, sealing ring 6, and valve stem 17 connects with pin 18 The butterfly plate 5 arranged in the middle of the rod body constitutes the intercepting surface of the valve cavity, and its characteristic is that the valve body at the lower end of the valve rod 17 is a lower branch valve body B with a certain eccentricity with the upper branch valve body A,

[0013] The end of the valve stem 17 placed in the inner cavity of the branch valve body B is provided with a shaft sleeve 2 coaxial with the valve stem, and an eccentric shaft sleeve 19 is added outside the sleeve at the same time, so that the entire assembly can be disassembled. The lower positioning structure of the valve stem drives the butterfly plate to translate to one side of the valve cavity.

[0014] The lower end of the...

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Abstract

The invention discloses an upper-detachable breakdown structure of a three-eccentric butterfly valve, which comprises a four-way pipe type valve body, a valve cover, a valve rod, a butterfly plate and a seal ring, wherein the valve rod and the butterfly plate arranged in the middle of a rod body of the valve rod form a valve cavity cutout face through a column pin. The valve body for placing the lower end part of the valve rod is a lower part branch valve body having certain eccentricity with an upper part branch valve body , a valve rod end part arranged in the inner cavity of the lower part branch valve body is provided with a shaft sleeve which is in coaxial core with the valve rod, and accordingly, a structure for positioning the lower part of the valve rod which can enable the whole valve rod to drive the butterfly plate to horizontally move to one side of the valve cavity together during disassembly. The upper-detachable breakdown structure of the three-eccentric butterfly valve ensures that the butterfly plate on the valve rod can leave a flow channel sealing face of the inner cavity of the valve body along with the translation of the valve rod after the valve cover and the eccentric shaft sleeve arranged on a lower part valve rod are taken down, thus the whole valve rod is convenient to take out from the cavity in the middle part f the valve body, thereby realizing replacement of a butterfly plate sealing element without disassembling the whole valve body from a fluid pipeline, and obviously reducing cost on pipeline maintenance greatly.

Description

technical field [0001] The invention relates to a triple-eccentric butterfly valve, in particular to a triple-eccentric butterfly valve capable of realizing on-line maintenance with a detachable disassembly structure, which belongs to a fluid pipeline cutting device. Background technique [0002] Because the butterfly valve not only has the characteristics of simple structure, small size, light weight, small fluid resistance, convenient and quick operation, and relatively labor-saving, but also can achieve good sealing and adjusting performance under low pressure, it is widely used in various fluid delivery pipelines. . [0003] In the traditional butterfly valve, the torque is transmitted between the valve shaft and the valve plate by a cylindrical pin or a tapered pin, so when transporting some suspension fluid, long-term operation will cause damage to the sealing ring. Because the traditional three-eccentric butterfly valve adopts the inherent connection structure of the...

Claims

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Application Information

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IPC IPC(8): F16K1/22F16K27/02F16K31/60
Inventor 李建和
Owner MINGZHU VALVE GRP
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