CN1112527C

CN1112527C - High temperature high corrosion resistant butterfly valve

Info

Publication number: CN1112527C
Application number: CN 00116614
Authority: CN
Inventors: 季祝华
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-06-20
Filing date: 2000-06-20
Publication date: 2003-06-25
Anticipated expiration: 2020-06-20
Also published as: CN1311406A

Abstract

The present invention provides a high temperature and high corrosion resistant butterfly valve which is a tri-eccentric multilayer 316L metal seal pair. Because of specific geometric shape, optimal design parameters are obtained via the optimization design of a computer to make opening and closing force moment decreased to minimum for achieving the ideal goals of no friction and zero leakage. The seal pair is made of 316L stainless steel material and butyl interlayer and is processed with special technology in the process of manufacture. The present invention has the characteristics of high temperature resistance, corrosion resistance, long service life, large circulation area and small flow resistance coefficient and is suitable for fluid impact of low or middle pressure. A flow-rate CV value is approximately equal to a percentage characteristic when the opening degree is within the range from 10 DEG C to 70 DEG C. The present invention has the advantages of compact structure, beautiful appearance, small volume, light weight, convenient installation and maintenance, and flexible operation. The valve is an ideal replacement product at present, and is matched with all electric, pneumatic and hydraulic mechanisms, etc. except for manual mechanisms to realize the purpose of remotely controlling and regulating or cutting off the flow-rate of a medium.

Description

High temperature high corrosion resistant butterfly valve

The present invention relates to improved valves on a kind of industrial pipeline, be that a kind of body approaches and the valve of ability≤455 ℃ high temperature liquid, particularly strong phosphoric acid adds a kind of butterfly valve of being able to bear strong corrosion of the low 316L hardness of hardness of particle, butterfly valve on the existing pipeline, as slim line with rubber, lining fluorine butterfly valve, because of sealing material ability temperature liquid more than 120 ℃ not, can only limit below 120 ℃ and use, as residue, granular are arranged in the pipeline transport, flow velocity is fast, crashed through sealing material, can not seal, because of other gate valve weight very heavy, can not on suspended piping, install, as install and must design a lot of supports, waste a large amount of metals and structural material and man-hour, and influenced the traffic under the pipeline.

The purpose of wood invention is:

Provide a kind of three eccentric multi-level 316L metallic seals to pay, high temperature resistant, the butterfly valve of high-corrosion resistant, it is that the sealing that increases on the butterfly plate of mandrel butterfly plate mechanical connecting structure is paid and selected the 316L stainless steel material for use in existing valve body, and butyl folder graphite layer is also carried out special process and handled in manufacture process, have high temperature resistant, anticorrosive, the characteristics of long service life adapt to the impact of the liquid of low middle pressure, circulation area is big, flow resistance coefficient is little, and compact structure is aesthetic in appearance, volume is little, in light weight, hoisting capacity is convenient to I﹠M apart from reducing to minimum, flexible operation, this valve is the update product that substitutes gate valve and stop valve, remove manual with any electronic, pneumatic, the supporting use of mechanism such as surge realizes that telecontrol regulates or cut-out-rate-of flow purpose.

This product has the following advantages:

A kind of high temperature high corrosion resistant butterfly valve, include body, this body has the control speed reducer, mandrel, the valve body mechanical connection, become one group of sealing to pay a butterfly plate to be connected on the mandrel with 316L material and butyl horsestone China ink is laminated with bolt machinery, characteristics with corrosion-and high-temp-resistant, butterfly plate has cam action and except all contact frictions between Sealing in valve stroke and the valve seat, making it frequent keying is the sealing effect that still has all the time, seal ring contacts with valve seat with certain wrapping angle, face is equivalent to an elongated wedge again around centering on it equably, and make active force be evenly distributed on the valve seat fully, owing to be that valve seat is stressed, so valve does not promptly need mechanical position-arresting device when cutting out.

Can high temperature resistantly corrode with height with 316L, this valve can isolate fire and play anti-fire action when cutting out, be widely used in: oilfield exploitation, chemical industry, petrochemical industry, coal gas, rock gas, thermoelectricity, water power plant, iron and steel, urban construction, tap water, sewage treatment, pharmacy, engineerings such as food are particularly used on the pipeline transport engineering with the SPA of particle zero leakage.

The present invention is easy to use, exchange to install light and handy, when same specification (more than the medium specification) during embodiment below adopting, gate valve under pressure and the material and stop valve, its weight only is 1/3 of gate valve and stop valve, so has reduced cost greatly.

Fig. 1 is the longitudinal sectional drawing of a kind of concrete structure of the present invention.

Describe details and the working condition that proposes concrete structure according to the present invention in detail below in conjunction with Fig. 1.

This invention connects mandrel (2) by control speed reducer (1), make with the 316L material, the synthetic one group of butterfly plate (3) of multi-disc 316L folder butyl graphite flake, by the 316L bolton on mandrel (2), valve body (4) sealing surface and butterfly plate (3) sealing coupling, reaching sealing purpose, and three off-centre not fixedly the stop bit device just can seal, the special adaptation in the roadside, often use on the pipeline on the ground environment of vibrations.

Claims

1, a kind of high temperature high corrosion resistant butterfly valve, include body, this body has control speed reducer (1) mandrel (2) valve body (4) mechanical connection, it is characterized in that: become one group of sealing to pay a butterfly plate (3) to be connected on the mandrel (2) with bolt machinery with 316L material and butyl horsestone China ink is laminated, three eccentric butterfly-shaped sealing is changed into are ended sealing, open and close moment and reduce to minimum, have the characteristics of corrosion-and high-temp-resistant.

2, as this high temperature high corrosion resistant butterfly valve of claim 1, it is characterized in that: butterfly plate (3) has cam three wobbler actions and has eliminated all contact frictions between the Sealing and valve seat in valve stroke, making it frequent keying is the sealing effect that still has all the time, seal ring contacts with valve seat with certain wrapping angle, face is equivalent to an elongated wedge again around centering on it equably, and make active force be evenly distributed on the valve seat fully, owing to be that valve seat is stressed, therefore valve does not promptly need mechanical position-arresting device when cutting out, three eccentric butterfly plates (3) not fixedly the stop bit device just can seal, when electricity liquid interlock control speed reducer (1) telecontrol is regulated, make the volume that circulates in the valve pocket big, flow resistance coefficient is little.