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Metal sealed butterfly valve without pin connection

A metal seal, pin connection technology, applied in shaft seals, lift valves, valve details, etc., can solve problems such as easy falling off and loose parts, and achieve the effect of eliminating friction, good sealing and long service life

Active Publication Date: 2013-09-25
ZHEJIANG ZHONGDE AUTOMATIC CONTROL VALVE
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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 solve the problems in the prior art, and propose a metal-sealed butterfly valve without a pin connection, which can eliminate the friction phenomenon between the valve stem and the shaft sleeve, and solve the problem that the internal parts of the valve are easy to loosen and fall off. Improve safety and reliability, prolong service life

Method used

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  • Metal sealed butterfly valve without pin connection
  • Metal sealed butterfly valve without pin connection
  • Metal sealed butterfly valve without pin connection

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Embodiment Construction

[0021] refer to figure 1 , the pinless metal seal butterfly valve of the present invention includes a rear bearing seat assembly 1, a pressure plate bolt and a nut 2, a pre-tightened butterfly spring 3, a packing 4, a packing spacer 5, a valve body 6, a limit sleeve 7, an antistatic device 8, Valve stem 9, valve plate 10, packing gland 11, packing pressure plate 12, front bearing seat assembly 13, the rear bearing seat assembly 1 and front bearing seat assembly 13 are respectively placed outside the two ends of the valve body 6 packing hole, and screwed And the positioning pin is fixedly connected with the valve body, the valve stem 9 is positioned and driven through the bearings in the rear bearing seat assembly 1 and the front bearing seat assembly 13, which greatly reduces the friction of the valve and reduces the opening and closing torque of the valve . The valve body 6 is integrally cast or forged, the filler 4 is installed in the filler hole of the valve body 6, and th...

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Abstract

The invention discloses a metal sealed butterfly valve without pin connection. The metal sealed butterfly valve comprises a back bearing block component, hold-down bolts and nuts, packing, a valve body, a valve stem, a valve plate, a packing bushing, a packing gland and a front bearing block component. Packing holes are formed in two ends of the valve body and filled with the packing, the packing is squeezed by the packing bushing and the packing gland, and the packing bushing and the packing gland are fixed on the valve body through the hold-down bolts and nuts. The back bearing block component and the front bearing block component are respectively arranged at two ends of the valve body, the valve stem is positioned and driven by bearings in the back bearing block component and the front bearing block component, and the valve plate is connected with the valve stem through a spline structure. The metal sealed butterfly valve without pin connection has the advantages that possibility of loosening of the inside of the valve or falling-off of parts inside the valve is avoided, friction between the valve stem and a shaft bush is eliminated since the bearings are moved to the outside of the valve body, 'zero friction' during start and stop processes of the valve is guaranteed by the three-eccentric valve plate and the U-shaped valve seat structure, and accordingly the metal sealed butterfly valve is adaptable to places having requirements for quick cutoff.

Description

【Technical field】 [0001] The invention relates to the technical field of pinless metal sealing butterfly valves, and is particularly suitable for the technical field of controlling butterfly valves in inflammable and explosive pipeline systems. 【Background technique】 [0002] The butterfly valve has the characteristics of simple structure and low cost, and is widely used in various fields such as petroleum, chemical industry, coal chemical industry, and light industry. In the existing butterfly valve, the internal valve stem and the valve plate are usually connected by conical pins. In order to prevent the pins from falling off during the use of the valve, spot welding is often used to fix the pins, which makes it difficult to disassemble or maintain the valve. ; Moreover, the spot welding method is not firm, and the pins will fall off in case of high temperature and high pressure or stress deformation. In some special working conditions where the medium is flammable and ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/22F16K1/38F16K1/32F16K41/02
Inventor 粟飞杨月富潘益茅洪卫
Owner ZHEJIANG ZHONGDE AUTOMATIC CONTROL VALVE
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