Vacuum furnace thermocouple installation leakage-prevention device

Abstract

The invention discloses a vacuum furnace thermocouple installation leakage-prevention device. The device comprises an installation seat (2), a sealing gasket (3) and an outer sleeve nut (6). The device is characterized in that the front part of the installation seat (2) is fixedly connected with a pipe body (1); the sealing gasket (3) and the pressing sleeve (4) are sequentially mounted in the inner cavity of the installation seat (2); the sealing gasket (3) and the pressing sleeve (4) are positioned through end surfaces; a locking pin (5) is installed between the pressing sleeve (4) and the installation seat (2); the outer sleeve nut (6) is detachably installed on the exterior of the installation seat (2); the outer sleeve nut (6) is pressed on the outer end surface of the pressing sleeve (4) in a matched manner; and the locking pin (5) is installed in a pin hole (7) formed in the installation seat (2). The device of the invention has the advantages of simple structure, convenient assembly and disassembly, reliable sealing and low cost, and is suitable for being popularized in vacuum furnace thermocouple leakage-prevention installation.

Description

technical field [0001] The invention belongs to the technical field of thermocouple installation, and in particular relates to an anti-leakage device for vacuum furnace thermocouple installation. Background technique [0002] Vacuum heat treatment furnace is a heat treatment furnace that puts the workpiece in a vacuum environment for heat treatment. Vacuum heat treatment can improve the surface quality and mechanical properties of the workpiece after heat treatment. It is one of the advanced heat treatment processes used in today's machinery manufacturing industry. First, it has a wide range of applications, especially in the aerospace industry. [0003] One of the key technical indicators of the vacuum furnace is to ensure that the furnace leakage rate (or pressure rise rate) does not exceed a certain indicator, such as: the leakage rate of the vacuum furnace for processing titanium alloys, brazing, etc. does not exceed 0.67Pa / hour, and the processing of steel parts The le...

AI Technical Summary

Problems solved by technology

The existing thermocouples are installed in various ways, and the main problems are: the seal is easy to fail under the alternating action of positive and negative pressure in the furnace; it is inconvenient to install and disassemble the thermocouple, and it is easy to damage the thermocouple wire during installation and disassembly; Use adhesives such as resin for sealing, so that the resin is difficult to remove after the thermocouple is disassembled, and the thermocouple cannot be used again, etc.

Thermocouple wires made of precious metals such as platinum and rhodium are scrapped after being used once, and the cost is relatively expensive

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