Sealing structure and method for mounting sensor through two layers of pressure boundaries

Abstract

The invention discloses a sealing structure for mounting a sensor by penetrating through two layers of pressure boundaries, a penetrating steel pipe penetrates through an outer-layer pressure boundary, and one end of the penetrating steel pipe is hermetically connected to the outer wall of an inner-layer pressure boundary through an inner-layer sealing device; the penetrating steel pipe penetratesthrough the outer-layer pressure boundary and is hermetically connected to the outer-layer pressure boundary through an outer-layer sealing device; the sensor probe and the sensor cable are both arranged in the penetrating steel pipe, and the sensor probe is connected to the sensor cable. The sensor probe penetrates through the inner-layer pressure boundary and is connected to the inner-layer pressure boundary in a sealed mode. The invention further discloses a sealing method for installing the sensor by penetrating through the two layers of pressure boundaries. According to the sealing structure and method for installing the sensor by penetrating through the two layers of pressure boundaries, the problem that the sensor is installed by penetrating through the two layers of pressure boundaries is simplified into the problem that only the inner-layer pressure boundary needs to be penetrated for installation, and the problem that a sensor signal cable also needs to be penetrated and sealed is solved.

Description

technical field [0001] The invention relates to the technical field of the nuclear industry, in particular to a sealing structure and a method for installing a sensor through a two-layer pressure boundary. Background technique [0002] In many thermal fluid experiments and tests of nuclear industry technology, it is often faced with the scenario of installing sensors through two or even multi-layer pressure boundaries. The sensor probe is installed through the inner pressure boundary, and its signal cable runs through the outer pressure boundary. The penetrating sealing of the sensor probe can be realized by means of threads, sealing gaskets, flanges, etc., but the penetrating sealing of the signal cable is more difficult. Electrical penetrations are widely used in industry to realize the sealing and insulation of cables penetrating pressure boundaries, such as electrical penetrations of nuclear power plant containment, electrical penetrations of pressure vessels, etc. Howe...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the electrical penetrating parts in the nuclear field in the prior art are prone to damage to the original cable, large electromagnetic interference, and fragile conductor components during use. The sealing structure and method for installing sensors to solve the above problems

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