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Insulated metal valve

A technology of insulating metal and valves, applied in the field of valve processing, can solve the problems of failure to realize the insulation and anticorrosion of special-shaped supporting equipment, anode current loss, electrochemical corrosion, etc., and achieve the effects of novel structure, long service life and low cost

Active Publication Date: 2009-02-11
SUZHOU GAS EQUIP & VALVES MFG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the gas transmission and distribution pipeline network system, there is a serious phenomenon of electrochemical corrosion; in order to overcome its adverse effects, a relatively complete cathodic protection system must be installed to insulate the entire system from the soil and stray currents in the soil, so that the cathode The anode current in the protection system is not easy to lose
At present, in the gas system, the steel pipe adopts the heat shrinkable sleeve of 3PE structure for anti-corrosion treatment, while the metal valve is usually provided with an insulating joint or insulating flange at both ends of the valve to isolate the metal valve from the steel pipe. Certain insulating effect, but its cost is high, the shape is huge, the structure is complex, and it cannot realize the complete insulation and anticorrosion of special-shaped supporting equipment such as valves

Method used

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Embodiment Construction

[0020] The insulated metal valve of the present invention not only has its usual functions, but also has excellent insulation and anti-corrosion properties. In the application, it can insulate and isolate the sections of the gas transmission and distribution pipeline, the gas pressure regulating station and the gas transmission and distribution pipeline, so that The anode current will not be lost to the soil through the metal valve, protecting it from electrochemical corrosion.

[0021] like figure 1 ,like figure 2 Shown: an insulating metal valve, including the valve body 1, the inlet of the valve and the outlet of the valve, the two interfaces of the valve shell are provided with an insulating structure 2, and the insulating structure 2 includes: a hook sleeve 5, a half ring 7, a poly Tetrafluoroethylene fixed ring 8, insulating ring A6, insulating ring B9, insulating ring C11, insulating sealing ring 10, conduit 13 and epoxy resin 4, the hook sleeve 5 is set on the interf...

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Abstract

There is disclosed an insulation metal valve, in which, an insulation structure is set at the two interfaces of the valve casing. The insulation structure includes a sleeve, a Hafu ring, a polytetrafluoroethylene fixing ring, three insulation rings, an insulated seal ring, a guide tube and epoxy resin. The first insulation ring, the Hafu ring and the polytetrafluoroethylene fixing ring are inserted between the interface and the sleeve on it, and the second and third insulation rings and the insulated seal ring are disposed between the interface and the butt-joint end of the guide tube. Between the gap sandwiches of the sleeve and the interface is filled with epoxy resin. The external interface of the guide tube is connected with the pipeline by welding to realize the effective insulation of the solid valve and the external connected pipeline.

Description

technical field [0001] The invention relates to an insulating metal valve, which belongs to the technical field of valve processing. Background technique [0002] With the widespread use of natural gas, the operating pressure of the entire pipeline network transmission and distribution system is gradually increasing, and the safety requirements are also getting higher and higher. Therefore, welded connection direct buried valves are widely used, eliminating the leakage hidden danger of the original flange connection interface , steel valves with weldability are generally used. [0003] However, in the gas transmission and distribution pipeline network system, there is a serious phenomenon of electrochemical corrosion; in order to overcome its adverse effects, a relatively complete cathodic protection system must be installed to insulate the entire system from the soil and stray currents in the soil, so that the cathode The anode current in the protection system is not easy ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K27/00F16L25/02
Inventor 沈伟伟张晓平张红军汪勇刚
Owner SUZHOU GAS EQUIP & VALVES MFG
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