CN1611817A - Double-clamping high-temperature-high-corrosion-resistance butterfly valve - Google Patents

Abstract

The invention provides a clip-type high-temperature and highly corrosion resistant butterfly valve. In the existing valve, the pivot connects with the butterfly board machinery. There is closed stainless steel material on the butterfly board. The butyl clip plumbago layer is treated with special technique during the production, is featured by high temperature resistance, corrosion resistance and long useful life and is adaptable to the impingement from the liquid with low-middle pressure. It is featured by large circulation area, small coefficient of flow resistance, compact structure, beautiful appearance, small volume, light weight, minimum open and close moment, simple installation and maintenance and flexible operation and can replace the gate valve and the break valve. It is widely applied to: petrifaction, coal gas, natural gas, thermoelectricity, hydraulic power plant, municipal construction, tap water, pharmacy, food and other projects and especially to the pipeline transportation with zero leakage.

Description

The wafer type high temperature high corrosion resistant butterfly valve

The present invention relates to improved butterfly valve on a kind of industrial pipeline, be that a kind of body approaches and a kind of butterfly valve of ability≤455 ℃ high temperature liquid, the butterfly valve on the existing pipeline is 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 is arranged in the pipeline transport, granular, flow velocity is fast, has crashed through sealing material, can not seal.

The objective of the invention is: a kind of wafer type high temperature high corrosion resistant butterfly valve is provided, it is in existing valve body, mandrel and butterfly plate mechanical connection, the sealing that increases on the butterfly plate are paid and are selected stainless steel material for use, 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 are the update products that substitutes gate valve and stop valve.

The present invention has the following advantages: a kind of wafer type 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 stainless steel 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.

This valve can isolate fire and play anti-fire action when cutting out, be widely used in: petrochemical industry, and coal gas, rock gas, thermoelectricity, the water power plant, urban construction, tap water, pharmacy, engineerings such as food are particularly used on the pipeline transport engineering with the particle zero leakage.

The present invention is easy to use, exchanges and installs lightly, and its weight only is 1/3 of gate valve and stop valve, has therefore 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 stainless steel material, the synthetic one group of butterfly plate (3) of multi-disc stainless steel folder butyl graphite flake, be fastened on the mandrel (2) by stainless steel bolt, 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, use on pipeline.

Claims (1)

1. A kind of wafer type high temperature high corrosion resistant butterfly valve, by the control speed reducer, connect mandrel, one group of butterfly plate, compositions such as wafer type valve body, it is characterized in that: control speed reducer and mandrel mechanical connection, control speed reducer and wafer type valve body mechanical connection, become one group of sealing to pay a butterfly plate to be connected on the mandrel with stainless steel and butyl horsestone China ink is laminated with bolt machinery, 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 makes active force be evenly distributed on the valve seat fully.