A sleeve seal assembly

Abstract

The invention discloses a sleeve sealing assembly, which comprises a pipe (1), a connecting stud (2), a nut (3), a sleeve (4) and a sealing ring (5) are coaxially arranged, wherein an annular boss (11) is arranged on the external surface of the pipe, a bulge loop (12) is arranged on one side of the annular boss (11), one side of the sealing ring (5) abuts against the bulge loop (12), the other side of the sealing ring (5) abuts against the connecting stud (2), and the nut (3) sleeves outside the connecting stud (2) and the sleeve (4). The sleeve sealing assembly is simple in structure, and convenient for mounting and dismounting, and can be repeatedly usable. The sleeve sealing assembly is suitable for wider scope from room temperatures to low temperatures, and is excellent in sealing performance.

Description

technical field [0001] The invention relates to a sealing device, in particular to a casing sealing assembly. Background technique [0002] Casing seal components in the field of refrigeration and cryogenic engineering, because the physical properties of materials in low-temperature environments are quite different from those in normal temperatures, they need to be specially designed to meet the characteristics of fast connection and disassembly, simple structure, and good sealing performance. Commonly used rubber sealing rings tend to become brittle and lose their sealing performance in low temperature situations, especially in deep and low temperature situations such as the liquid nitrogen temperature range (80K, below -193°C). In addition, most of the existing sealing technologies and structures currently form surface seals through the close cooperation between surfaces, while for mechanical seals, line seals have a smaller area and higher pressure, and their sealing perf...

AI Technical Summary

Problems solved by technology

However, the contact between the metal sealing ring and the outer surface of the connecting pipeline is surface contact. Due to the characteristics of its flat seal, the sealing force is relatively large, and the required operating force is also large, and it is squeezed by a large radial force at room temperature. After pressing and close contact, enter the deep low temperature environment. Since the thermal expansion coefficient of non-metallic materials is greater than that of metal materials, the metal sealing ring and the outer surface of the connecting pipeline are too closely contacted, which may damage the components.

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