CN101943268A - Flanged pneumatic slowly-closing stepless locking butterfly valve with high temperature insulating performance, high corrosion resistance and high pressure resistance - Google Patents

Abstract

The invention relates to a modified valve on an industrial pipeline, in particular to a flanged pneumatic slowly-closing stepless locking butterfly valve with high temperature insulating performance, high corrosion resistance and high pressure resistance. The butterfly valve of the invention comprises a body, wherein the body is provided with a connecting central spindle for a control reduction gear; the connecting central spindle is in mechanical connection with a valve body; multiple 316L methyl-butyl graphite sheets are combined to form a set of butterfly plates, which is fastened on the central spindle by a 316L bolt; an insulating shell is welded or casted outside the flanged valve body, and the seal surface of an in-out connecting pipe device and the butterfly plates are sealed and coupled, thus realizing the purpose of sealing; the butterfly plate has a cam triple eccentric function, and eliminates all the contact friction between a sealing element and a valve seat in the valve gate stroke, thus enabling the sealing effect to be constant under the condition of frequent stop-start motion; a sealing ring is contacted with the valve seat with a certain contact angle, can uniformly surround the periphery face of the valve seat so as to form a lathy wedge, and enables the acting force to be completely and uniformly distributed on the valve seat; and since the valve seat is stressed, the pneumatic slowly-closing stepless locking control reduction gear of the valve can be stopped without needing a mechanical bit-stop device.

Description

The stepless tight lock butterfly valve of the high pressure resistant pneumatic Slow Close of a kind of flange-type soak highly corrosion resistant

Technical field:

The present invention relates to improved valve on a kind of industrial pipeline, is that a kind of body approaches and the valve of 455 ℃ of high temperature liquids of ability, and particularly strong phosphoric acid adds the stepless tight lock butterfly valve of a kind of high pressure resistant pneumatic Slow Close of being able to bear strong corrosion of the low 316L hardness of hardness of particle.

Background technique:

Butterfly valve on the existing pipeline, as slim 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, Hand-operated butterfly valve is owing to be that open the Pyatyi location, can only lean on line with rubber during sealing, the sealing of lining fluorine soft material bounce-back property can only be used by low temperature, as residue is arranged in the pipeline transport, granular, flow velocity is fast, has crashed through sealing material, can not seal.Open the Pyatyi location, uses the hard material rigid seal, though can use by high temperature, the sealing of no soft material bounce-back property can not seal, and can only low pressure use.Very heavy because of other gate valve weight, 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.

Summary of the invention:

In order to overcome slim line with rubber, lining fluorine gate valve is because of sealing material ability temperature liquid more than 120 ℃ not, can only limit below 120 ℃ and use, Hand-operated butterfly valve can only lean on line with rubber owing to be that open the Pyatyi location during sealing, the sealing of lining fluorine soft material bounce-back property, can only use by low temperature, as residue is arranged in the pipeline transport, granular, flow velocity is fast, crashed through sealing material, can not seal.Open Pyatyi location, use the hard material rigid seal, though can use by high temperature, the property sealing that rebounds of no soft material can not seal, shortcoming that can only the low pressure use.The objective of the invention is: provide the high pressure resistant pneumatic Slow Close of a kind of flange-type soak highly corrosion resistant stepless tight lock butterfly valve, three eccentric multi-level 316L metallic seals are paid, high temperature resistant, the stepless tight lock butterfly valve of the high pressure resistant pneumatic Slow Close of high-corrosion resistant is burn-on or is cast in heat-preservating shell and the turnover connecting tube device in that flange valve is external.

Technological scheme: the stepless tight lock butterfly valve of the high pressure resistant pneumatic Slow Close of a kind of flange-type soak highly corrosion resistant, include body, this body has stepless tight lock butterfly valve control speed reducer of pneumatic Slow Close and mandrel mechanical connection, control speed reducer and flange valve be external burn-ons or casts heat-preservating shell and pass in and out the connecting tube device for mechanical and be connected, it is characterized in that with the synthetic one group of butterfly plate of multi-disc 316L folder butyl graphite flake, by the 316L bolton on mandrel, flange valve is external burn-ons or casts heat-preservating shell and turnover connecting tube device sealing surface and butterfly plate sealing coupling, to reach sealing purpose, valve body is burn-on outward or is cast heat-preservating shell and the connection of turnover connecting tube device for mechanical.Butterfly plate 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 the stepless tight lock control speed reducer of the pneumatic Slow Close of valve does not promptly need mechanical position-arresting device when cutting out, three eccentric butterfly plates not fixedly the stop bit device just can seal, when the stepless tight lock control speed reducer telecontrol of pneumatic Slow Close is regulated, make the volume that circulates in the valve pocket big, flow resistance coefficient is little.

Technique effect: with high pressure resistant valve of 316L energy high-temperature-resistant thermal-insulation highly corrosion resistant, when closing, can isolate fiery finishing and play anti-fire action, 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.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.

Description of drawings:

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

Embodiment:

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

This valve has control speed reducer (1) and connects mandrel (2) and valve body (5) mechanical connection, control speed reducer (1) is burn-on outward with flange-type valve body (5) or is cast heat-preservating shell (7) and pass in and out the connecting tube device for mechanical and is connected, with the synthetic one group of butterfly plate (3) of multi-disc 316L folder butyl graphite flake, be fastened on the mandrel (2) by 316L bolt (6), flange valve is external burn-ons or casts heat-preservating shell and turnover connecting tube device (4) sealing surface and butterfly plate (3) sealing coupling, to reach sealing purpose, and three off-centre not fixedly the stop bit device just can seal, valve body (5) is outer burn-ons or casts heat-preservating shell (7) and pass in and out connecting tube device (8) mechanical connection.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 the stepless tight lock control speed reducer of the pneumatic Slow Close of 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 the stepless tight lock control speed reducer of pneumatic Slow Close (1) telecontrol is regulated, make the volume that circulates in the valve pocket big, flow resistance coefficient is little.Use on the special pipeline that adapts on the ground environment that often shakes in the roadside.

Claims (2)

1. stepless tight lock butterfly valve of the high pressure resistant pneumatic Slow Close of flange-type soak highly corrosion resistant, include body, this body has the control speed reducer and connects mandrel and valve body mechanical connection, it is characterized in that with the synthetic one group of butterfly plate of multi-disc 316L folder butyl graphite flake, be fastened on the mandrel by the inspection of 316L spiral shell, flange valve is external burn-ons or casts heat-preservating shell and turnover connecting tube device sealing surface and butterfly plate sealing coupling, to reach sealing purpose, valve body is burn-on outward or is cast heat-preservating shell and the connection of turnover connecting tube device for mechanical.

2. the stepless tight lock butterfly valve of the high pressure resistant pneumatic Slow Close of a kind of flange-type soak highly corrosion resistant as claimed in claim 1, it is characterized in that butterfly plate has cam three wobbler actions and 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 the stepless tight lock control speed reducer of the pneumatic Slow Close of valve does not promptly need mechanical position-arresting device when cutting out, three eccentric butterfly plates not fixedly the stop bit device just can seal, when the stepless tight lock control speed reducer telecontrol of pneumatic Slow Close is regulated, make the volume that circulates in the valve pocket big, flow resistance coefficient is little.

Images