Ice plug jacket device for inspection and maintenance of metal face seal joints

Abstract

The invention relates to an ice plug jacket device used for inspection and maintenance of metal surface sealing joints, comprising a joint jacket, and butt joint jacket I and butt joint jacket II respectively connected to two ends of the joint jacket. The jacket is wrapped on the outside of the metal surface sealing joint, and the butt jacket I and the butt jacket II are respectively wrapped on the outside of the corresponding pipe; the refrigerant is filled into the inner cavity of the joint jacket, butt jacket I, and butt jacket II, Make icicles from the liquid in the joints or pipes wrapped by each jacket. The liquid nitrogen vaporization discharge port and the ultrasonic detection port are provided on the docking jacket I. There are liquid nitrogen inlet, compressed air inlet and infrared temperature detection port on the docking jacket II. The invention is applicable to connecting pipes of different specifications at both ends of the VCR joint, and realizes remote monitoring and measurement, as well as the function of quick thawing of ice plugs.

Description

technical field [0001] The invention belongs to a clamping device, in particular to an ice plug jacket device used for inspection and maintenance of metal surface sealing joints (such as VCR joints). Background technique [0002] In the heavy water tritium removal process combined with the electrolytic catalytic exchange system, the tritium-containing heavy water in the system pipeline is mainly composed of D 2 Composed of O and DTO, it has strong internal radiation. When the flowmeter, back valve, pulse damper, etc. installed on the pipeline between the two VCR joints fail and need to be replaced, the associated system must be evacuated and purged. During the continuous operation of the process system, due to the inability to drain and purge the medium in the system, it is impossible to replace the faulty flow meter and back pressure valve. Damaged equipment can only be replaced after the system has been drained and purged after parking, which will affect the continuous, ...

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Problems solved by technology

[0003] Patent application 200620116333.1 discloses a "square ice plug jacket", and patent application 201811589261.6 discloses a "nuclear power plant liquid nitrogen ice plug device and its ice plug control method". These existing ice plug jackets are only for round There is no ice plug jacket design specially designed for metal surface sealing joints and pipes of different specifications at both ends of the joint, and it does not have the functions of remote monitoring and quick thawing

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