A connection structure of a ceramic valve core and a metal rod and a connection method thereof
A technology of ceramic valve core and connection structure, which is applied in the direction of valve devices, mechanical equipment, engine components, etc., can solve problems such as difficult processing, unfeasible connection methods, mismatching expansion coefficients of ceramic and metal rods, etc., to avoid collapse , The connection structure between the ceramic valve core and the metal rod is simple and avoids the effect of processing
Active Publication Date: 2020-07-14
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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Problems solved by technology
[0004] When the spool is made of silicon carbide ceramics, due to the difficulty of machinability of the silicon carbide ceramic thread and the mismatch of the expansion coefficient of the ceramic and the metal rod under high-temperature working conditions, the connection method of the silicon carbide ceramic spool and the metal rod threaded connection is not possible. Row
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[0019] In the prior art, when the spool is made of silicon carbide ceramics, due to the difficulty of machinability of silicon carbide ceramic threads and the mismatch of expansion coefficients between ceramics and metal rods under high-temperature working environments, the spool of silicon carbide ceramics and the metal rod The connection method of threaded connection is not feasible. The invention provides a connection structure between a ceramic valve core and a metal rod. The tail of the valve core is formed into a convex shape, and the head of the metal rod is formed into a concave shape. The tail of the valve core and the head of the metal rod are each provided with a through hole, and the two through holes are concentric. ; One side of the through hole of the metal rod head is provided with an internal thread, and the other side is provided with a stepped hole for screwing in a nut; after the valve core is matched with the metal rod, the two through holes are aligned, an...
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The invention relates to a connecting structure of a ceramic valve element and a metal rod and a connecting method thereof. The connecting structure of the ceramic valve element and the metal rod is structured such that the tail of the valve element (1) is convex, the head of the metal rod (2) is concave, through holes (3,4) are separately formed in the tail of the valve element (1) and the head of the metal rod (2), and the two through holes (3,4) are concentric; an inner thread (5) is arranged on one side of the through hole (4) in the head of the metal rod (2) while a step hole (6) where anut is screwed into is formed in the other side; and after the valve element (1) and the metal rod (2) are matched, the two through holes (3,4) are aligned, and a bolt (7) is screwed into, so that thevalve element (1) and the metal rod (2) are firmly connected.
Description
technical field [0001] The invention relates to the technical field of engineering ceramic materials, in particular to a connection structure between a ceramic valve core and a metal rod and a connection method thereof. Background technique [0002] As a special valve for regulating the flow and pressure of black water in the field of coal chemical industry, the black water regulating valve has a working environment temperature up to 300°C. The base material of the spool is made of wear-resistant materials such as 314 stainless steel, 316 stainless steel, integral sintered tungsten carbide or silicon carbide ceramics, and the metal rod connected with the spool is made of ordinary stainless steel. [0003] When the base material of the spool is 314 stainless steel, 316 stainless steel or integral sintered tungsten carbide, the connection between the spool and the metal rod is the internal thread of the spool, the external thread of the metal rod or the threaded connection of ...
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IPC IPC(8): F16K51/00
CPCF16K51/00
Inventor 张玉强杨金晶刘学建陈忠明黄政仁
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI