Metal-sealing insulation jacket butterfly valve

Abstract

The invention discloses a metal-sealing insulation jacket butterfly valve. The metal-sealing insulation jacket butterfly valve comprises a press sleeve, a plurality of shaft sleeves, a dustproof device, a valve rod, a plurality of taper pins, a valve plate, a valve body, an insulation jacket layer, fillers, filler pressing sleeves, filler pressing plates, a valve seat, a valve seat pressing ring and a plurality of steam interfaces, wherein the valve body is of a whole cast structure, the insulation jacket layer integrally coats the outer side of the wall of the valve body, axial holes are formed in the two ends of the valve body, the fillers are arranged in the axial holes and are extruded by the filler pressing sleeves and the filler pressing plates, the filler pressing sleeves and the filler pressing plates are fixed on the valve body, the valve rod is of an integral structure, the valve plate is connected with the valve rod through the taper pins, exposed portions of the taper pins are connected with the valve plate through spot welding, and threaded holes are formed outside the taper pins. The metal-sealing insulation jacket butterfly valve has the advantages that the aim of whole valve insulation is realized, the phenomenon that the shaft sleeves and the valve rod are subjected to jamming or locking caused by the fact that a medium enters the shaft sleeves is avoided, and meanwhile, the shaft sleeves are coated in an insulation layer, so that the phenomenon of mechanical deformation due to temperature difference is eliminated, and the service life of the valve is prolonged.

Description

【Technical field】 [0001] The invention relates to the technical field of metal-sealed heat-insulating jacketed butterfly valves, and is particularly suitable for the technical field of controlling butterfly valves on process pipelines where the medium needs heat preservation or heat tracing in industrial installations such as petroleum and chemical industry. 【Background technique】 [0002] In petroleum, chemical, coal chemical, light industry and other industrial installations, the medium in some pipeline systems is prone to crystallization, solidification or increased viscosity at a certain temperature due to its characteristics. Such as sulfur, asphalt and other media. [0003] With the continuous and rapid development of my country's economy, the import of sulfur-containing crude oil is increasing year by year. During the refining process, desulfurization treatment must be carried out and recycled to achieve clean production, turn harm into profit, turn waste into treasur...

AI Technical Summary

Problems solved by technology

When the diameter of the pipeline is large, the cost of the ball valve or gate valve is much higher than that of the butterfly valve of the same specification. Moreover, due to the structural characteristics of the ball valve or gate valve, it has the disadvantages of difficult processing and high cost.

At present, the valves with heat preservation function at home and abroad have many shortcomings such as the shaft sleeve is easy to get stuck or even locked, the switch is not strict, the heat preservation is not complete, and the service life is short.

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