CN1594943A - Opposite clamping type signal feedback pneumatic online pressure detection butterfly valve - Google Patents

Abstract

This invention is a signal feedback opposite-clamping hydrodynamic butterfly valve of online pressure check, including a noumenon that is made up of air-driven butterfly valve-controlling speed-reducing device, the core axis and the valve case. The front stage and the back stage sealing rings in the sub-interlayer added on the butterfly board is mechanically connected, the inter tube of the valve case is mechanically connected with the sealed pressure tube of online check, the core axis and the butterfly board are mechanically linked, the speed-reducing control is mechanically connected with the core axis, the speed-reducing control and the valve case are mechanically linked. This invention is widely used in the pipelines of the projects of oil field exploration, oil chemistry, coal gas, natural gas, hot electricity, hydraulic power station, steel, tap water, sewage processing, pharmacy and foodstuff for long-distance control of environmental depravation.

Description

The pneumatic online detected pressures butterfly valve of wafer type signal feed back

The present invention relates to improved valves on a kind of industrial pipeline, is the thin valve of a kind of body.Butterfly valve on the existing pipeline, as line with rubber, lining fluorine gate valve, because of sealing material ability temperature liquid more than 120 ℃ not, can only limit below 120 ℃ and use, 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 objective of the invention is: provide a kind of wafer type signal feed back pneumatic online detected pressures butterfly valve, butterfly plate has cam action and has eliminated all contact frictions between the Sealing and valve seat in valve stroke, and making it when frequent the keying is the sealing effect of tool all the time.Secondary seal is installed at valve can online detection sealing load in the pipeline.Seal ring contacts with valve seat with certain contact, face is distributed on the valve seat again fully fifty-fifty around centering on it equably, owing to be that valve seat is stressed, therefore valve does not promptly need mechanical position-arresting device when cutting out, and this valve is because special set shape, machine optimal design as calculated, drawing best design parameter makes keying moment reduce to minimum, reaching does not have friction, the desirable purpose of zero leakage, and in manufacture process, carry out special process and handle, have anticorrosive, the characteristics of long service life, circulation area is big, and flow resistance coefficient is little, and structure is tightly played, aesthetic in appearance, the I﹠M of being convenient in light weight, flexible operation, this valve are present desirable update products.The supporting use of signal feed back pneumatic mechanism realizes telecontrol adjusting or cut-out-rate-of flow purpose.

This product has the following advantages: the pneumatic online detected pressures butterfly valve of a kind of wafer type signal feed back, include body, this body has the control speed reducer, mandrel, wafer type valve body mechanical connection signal feedback device, fastening piece connection groups such as signal feed back shelf and screw, this valve can isolate fire and play anti-fire action when cutting out, be widely used in: oilfield exploitation, chemical industry, coal gas, rock gas, thermoelectricity, water power plant, iron and steel, tap water, sewage treatment, pharmacy, use on the abominable distant control pipeline transport of engineerings such as food, the particularly environment engineering.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 1/4 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 is by signal feedback device (9), fastening piece connection groups (10) such as signal feed back shelf and screw, wafer type pneumatic control speed reducer (1) connects mandrel (2), the multi-disc stainless steel synthesizes one group of butterfly plate (3), is fastened on the mandrel (2) wafer type valve body (4) sealing surface and butterfly plate (3) sealing coupling by stainless steel bolt, to reach sealing purpose, the sealing pair interlayer that increases on the butterfly plate, prime sealing (5), final-stage seal (6).The wafer type valve body carries out special process in manufacture process handles, take in the wafer type valve body (7), connect online detection sealing load pipe (8), in-line detects sealed at both ends pressure in the pipeline but secondary seal is installed at valve, mandrel and butterfly plate mechanical connection, control speed reducer and mandrel mechanical connection, pneumatic control speed reducer and valve body mechanical connection.

Claims (1)

1. The pneumatic online detected pressures butterfly valve of a kind of wafer type signal feed back, include body, this body has the control speed reducer, mandrel, compositions such as wafer type valve body, it is characterized in that: prime seal ring and final-stage seal circle mechanical connection in the sealing pair interlayer that increases on the butterfly plate, take in the wafer type valve body, online detection sealing load pipe mechanical connection, mandrel and butterfly plate mechanical connection, signal feedback device, fastening piece connection group mechanical connections such as signal feed back shelf and screw, pneumatic control speed reducer and mandrel mechanical connection, pneumatic control speed reducer and wafer type valve body mechanical connection.