Mobile remote freezing overhaul device
An inspection device and long-distance technology, which is applied in the field of mobile remote refrigeration inspection and repair devices, can solve problems such as the inability to dredge blocked pipelines, failure to install inspection valves, and difficult inspection methods, so as to achieve controllable dose of personnel exposure and avoid radioactive pollution , Good dredging effect
Active Publication Date: 2019-04-26
THE 404 COMPANY LIMITED CHINA NAT NUCLEAR
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2. After the process pipeline is clogged, the maintenance personnel will introduce pressure purge, steam purge or acid soaking through the outdoor process pipeline of the equipment to unclog it. Blowing, 8Kg steam blowing and other methods are extremely difficult to dredge
[0003] After the process pipeline in a high-radioactive environment is blocked, because the process pipeline in the equipment room is mostly three-way or four-way, which communicates with multiple equipment storage tanks, and there is no maintenance valve installed in the equipment room, the pressure in the process pipeline cannot be suppressed, and it is impossible to pass through compressed air, steam, etc. Unclog blocked pipelines by other conventional methods
In addition, since the radioactivity dose measured in the on-site equipment room is above 3000mSv / h, the dose at the blocked position of the process pipeline is higher, and there is no safe maintenance condition, and the maintenance personnel cannot enter the equipment room for maintenance, so the existing maintenance method is difficult to implement
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[0028] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0029] Such as figure 1 The mobile long-distance freezing maintenance device shown can be used for freezing maintenance of blockage of high-radiation pipelines, including a freezing tank 3 , an exhaust pipe 2 and a liquid nitrogen diversion pipe 4 .
[0030] The freezing tank 3 is used to contain liquid nitrogen, and the concave clamping port 1 is processed on the freezing tank 3. The direction of the clamping port 1 is parallel to the central axis of the freezing tank 3, and the high-radiation pipeline to be repaired can be It is clamped in the clamping port 1 by frictional force, and fits closely with the freezing tank 3 to ensure that the medium in the pipeline is frozen in the shortest time. The size of the clamping port 1 matches the diameter of the high-radiation pipeline to be overhauled. The high-activity pipelines to be rep...
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The invention relates to the technical field of radioactive environment overhaul, and particularly discloses a mobile remote freezing overhaul device. The mobile remote freezing overhaul device comprises a freezing tank, an exhaust pipe arranged at the top end of the freezing tank and a liquid nitrogen guiding pipe connected with the side wall of the freezing tank. The mobile remote freezing overhaul device is resistant to corrosion, free of deformation under freezing, free of embrittlement and low in weight, can be remotely operated by overhaul staff conveniently, can lower the exposure doseof the overhaul staff as much as possible, is easy to operate and convenient to use, and meets the requirement for remote overhaul of high-radioactive places.
Description
technical field [0001] The invention belongs to the technical field of radioactive environment maintenance, and in particular relates to a mobile remote refrigeration maintenance device. Background technique [0002] There are currently two main methods for the maintenance of process pipelines in high-radiation environments: 1. Clean and decontaminate the process system and conduct on-site inspections. After the radioactive dose is at least less than 200uSv / h to meet the safety requirements, the maintenance personnel wear protective work clothes and maintenance air suits etc., enter the radioactive equipment room to cut and block the process pipeline, replace the pipeline with the same specification and material, weld it, complete the inspection after passing the flaw detection, and dispose of the cut process pipeline, protective clothing, etc. as radioactive waste. 2. After the process pipeline is clogged, the maintenance personnel will introduce pressure purge, steam purge...
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IPC IPC(8): G21C17/017G21C15/14
CPCG21C15/14G21C17/017Y02E30/30
Inventor 牟凌陈勤王俊会贾巍峰刘开明张磊张卫林覃龙曹学斌马光辉
Owner THE 404 COMPANY LIMITED CHINA NAT NUCLEAR