Direct buried type all-welded insulation ball valve

Abstract

The invention provides a direct buried type all-welded insulation ball valve. The direct buried type all-welded insulation ball valve comprises a valve body with a fluid passageway in internal part, a ball body placed at the center of the fluid passageway, a valve rod connected with the upper end of the ball body and a handle connected to the upper end of the valve rod. The direct buried type all-welded insulation ball valve is characterized in that the valve body sequentially comprises a seamless steel tube layer, an insulation layer and a plastic board layer from inner part to outer part, wherein the insulation layer is provided with at least one detection line to connect with a leakage alarming device; a valve base is arranged at the periphery of the ball body, and a valve base support and a spring supporting the valve support are arranged in the valve base; and the valve rod is an extension bar, and the distance of the valve rod extending the valve body is not less than the buried depth of the valve body. The direct buried type all-welded insulation ball valve has the advantages of being flexible to open and close, long in service life, and better in sealing effect under the action of pressure fluid; and the ball valve is provided with an extension valve rod, so that the opening and closing device is in earth surface, the valves can be conveniently opened and closed, the mounting period is shortened, the cost is reduced, and the maintenance is convenient.

Description

technical field [0001] The invention belongs to the field of valves, in particular to a direct-buried fully welded thermal insulation ball valve. Background technique [0002] The thermal insulation ball valves currently used are basically flange-connected thermal insulation ball valves, and most of them use interlayer thermal fluid to conduct and compensate heat for thermal insulation. During the transmission process, a fluid heating device needs to be built next to each thermal insulation valve to ensure heat compensation. In this way, a large amount of fuel is required to ensure heating, which conflicts with the current goal of environmental protection to reduce carbon emissions; ball valves that use thermal fluid insulation with interlayers need to weld interlayers in the manufacturing process, and the cost of interlayer welding is relatively large, and The production cycle is long; the usual valve stem is short, and the underground space for valve opening and closing ne...

AI Technical Summary

Problems solved by technology

[0002] The thermal insulation ball valves currently used are basically flange-connected thermal insulation ball valves, and most of them use interlayer thermal fluid to conduct and compensate heat for thermal insulation. During the transmission process, a fluid heating device needs to be built next to each thermal insulation valve to ensure heat compensation. In this way, a large amount of fuel is required to ensure heating, which conflicts with the current goal of environmental protection to reduce carbon emissions; ball valves that use thermal fluid insulation with interlayers need to weld interlayers in the manufacturing process, and the cost of interlayer welding is relatively large, and The production cycle is long; the usual valve stem is short, and the underground space for valve opening and closing needs to be built when the valve is buried in the ground, which increases the installation cost and is not conducive to maintenance and maintenance

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