Valve combination mode of high polymer material combined with ceramic and composite ball valve

Abstract

The invention discloses a valve combination mode of high polymer material combined with ceramic and a composite ball valve. A valve core and a valve seat are made of ceramic material; a valve body is made of the high polymer material; the valve seat on at least one edge is arranged on a compensating pressing sleeve made of the high polymer material of which an expansion coefficient is greater than that of a material of the valve body, and the compensating pressing sleeve compensates a gap error caused by difference of expansion coefficients between the valve core and the high-polymer valve body material by surplus expansion quantity generated by the expansion coefficient greater that the valve body material. The invention proposes a new ball valve structure combined with the high polymer material and the ceramic by combining a common high polymer material injection technology with a production technology of a ceramic product, and the prepared ball valve has double advantages of both the high polymer and the ceramic, has corrosion resistance, durability, high service life and reliability. The productive technology complexity and the production cost are greatly reduced compared with those of the ball valve with a steel and ceramic composite structure.

Description

technical field [0001] The invention relates to a method and a product of a composite valve formed by a polymer material and ceramics, in particular to a method and a structure of a ball valve formed by a polymer material and ceramics, belonging to the technical field of valves. Background technique [0002] As far as valve products are concerned, there are many varieties of applications. In terms of ball valves alone, there are steel ball valves, various types of plastic ball valves, and glass fiber reinforced plastic ball valves. At present, the commonly used valves are metal valves. Although the structure and materials of metal valves have been improved, due to the limitations of the properties of metal materials, they cannot meet the needs of harsh working conditions such as higher and higher wear and strong corrosion. This is mainly reflected in the use of The short life and serious leakage greatly affect the stability of the system operation; the application of cerami...

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Problems solved by technology

[0009] The purpose of the present invention is to address the shortcomings of the existing valve structure, and propose a ceramic valve combination method with a more reasonable structure. This ceramic valve has a more effective sealing method, which can effectively solve the problem caused by the different expansion coefficients of the ceramic valve core and valve body gap problem

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