Micro-damaged tube fetching device and process for heat transfer tube of shell-tube heat exchanger

A shell-and-tube heat exchanger and heat transfer tube technology, applied in the field of mechanical processing, can solve the problems of economic loss, heat exchanger damage, heat exchanger can not continue to operate and use, and achieve the effect of saving economic resources and small damage

Pending Publication Date: 2019-03-01
RES INST OF NUCLEAR POWER OPERATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this way of taking out the tube can completely take out the required heat transfer tube section, it has caused obvious damage to the heat exchanger, making the heat exchanger unable to continue to operate, resulting in certain economic losses

Method used

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  • Micro-damaged tube fetching device and process for heat transfer tube of shell-tube heat exchanger
  • Micro-damaged tube fetching device and process for heat transfer tube of shell-tube heat exchanger
  • Micro-damaged tube fetching device and process for heat transfer tube of shell-tube heat exchanger

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Embodiment Construction

[0027] The present invention will be further described below with reference to the drawings and embodiments.

[0028] Such as Figure 1 to Figure 4 As shown, a shell-and-tube heat exchanger heat transfer tube micro-damage tube removal device includes a magnetic drill fixing tool 1, a heat transfer tube inner cutter, a heat transfer tube ejection tool 6 and a tube top rod 7. Magnetic drill fixing tool 1 is used to fix the magnetic drill. The heat transfer tube internal cutting device is used to cut the heat transfer tube 8 from the inside. The heat transfer tube ejection tool 6 is used to insert the heat transfer tube 7 and push it upward. The tube ejector rod 7 is used to push up the heat transfer tube ejection tool 6 so as to realize the separation of the heat transfer tube 8 and the tube sheet 9.

[0029] The magnetic drill fixing tool 1 has a U-shaped plate shape as a whole, and a positioning hole is provided on the upper end surface for fixing the magnetic drill. The magnet...

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Abstract

The invention belongs to the technical field of machining, and particularly relates to a micro-damaged tube fetching device and process for a heat transfer tube of a shell-tube heat exchanger. By means of the novel micro-damaged tube fetching device and process for the shell-tube heat exchanger, on the premise of minimizing the overall damage to the heat exchanger, a tube expansion transition zoneof the heat transfer tube is completely taken out. The heat transfer tube taken out by the process contains the complete tube expansion transition zone, and the original state of the transition zoneis maintained to the maximum extent, so that the performance evaluation and failure mechanism research of the heat transfer tube after long-term operation are facilitated. In addition, after taking out the tube expansion transition zone of the heat transfer tube with the process, the overall damage to the heat exchanger is small; when a tube hole after fetching the tube is blocked by a welding/mechanical plug, the heat exchanger can still continue to operate, so that all kinds of economic resources are greatly saved.

Description

Technical field [0001] The invention belongs to the technical field of mechanical processing, and specifically relates to a tube-and-shell heat exchanger heat transfer tube micro-loss tube taking device and process. Background technique [0002] The function of the heat exchanger is to transfer the heat of the high temperature water inside the tube to the outside to become steam and maintain the integrity of its pressure boundary. The core component of the heat exchanger is the heat transfer tube. At present, the commonly used heat exchanger is a shell-and-tube heat exchanger, with thousands of heat transfer tubes forming a tube bundle in a U-shaped structure. The two ends of the heat transfer tubes are connected to the shell-and-tube heat exchanger tube plate for expansion. Add welding form. According to the operating experience of petrochemical and nuclear power plants, the failure location of the heat transfer tube of the shell-and-tube heat exchanger is mainly in the transit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P23/02B23P15/00
CPCB23P15/00B23P23/02
Inventor 罗垚但体纯汪潇施慧烈乐适
Owner RES INST OF NUCLEAR POWER OPERATION
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