Repair method and repair device for catheter

Abstract

The invention discloses a repairing method for a guide pipe. The repairing method is used for repairing a damaged pipe head and includes the following steps that a damaged part of the pipe head is removed; a repairing thick pipe is fixedly arranged on a sleeving section of a repairing thin pipe in a sleeving manner; a connecting section of the repairing thin pipe stretches out of the repairing thick pipe; the repairing thick pipe and the repairing thin pipe are inserted in a pipe plate through hole, and the connecting section stretches in the rest of the pipe head; and pipe expansion operation is conducted on the repairing thin pipe, the connecting section and the rest of the pipe head are extruded and attached mutually, the sleeving section and the repairing thick pipe are extruded and attached mutually, and the repairing thick pipe and the pipe plate through hole are extruded and attached mutually. By means of the repairing method, the repairing thick pipe is used for replacing the damaged part of the pipe head, the rest of the pipe head and the repairing thick pipe communicate with each other through the repairing thin pipe, a new pipe head is formed, overall replacing and depot repair of a heat exchange bundle are avoided, and an indirect air cooling system can be simply and efficiently repaired. The invention further provides a guide pipe repairing device suitable for the above repairing method.

Description

technical field [0001] The present invention relates to the technical field of power generation equipment, in particular to a repair method for a conduit, and also relates to a repair device for a conduit suitable for the above repair method. Background technique [0002] The indirect air cooling system is one of the key equipment to ensure the normal operation of the thermal power plant, so the maintenance and repair of the indirect air cooling system has become the top priority of the thermal power plant. [0003] The main working part of the indirect air cooling system is the heat exchange tube bundle. When the high temperature cooling water flows inside it, it can exchange heat with the air to reduce the temperature of the cooling water. The heat exchange tube bundle is generally supported and restrained by the tube sheet 01, and a plurality of through holes 02 are opened on the tube sheet 01, such as figure 1 As shown, each through hole 02 is passed through by a sectio...

AI Technical Summary

Problems solved by technology

[0004] Since the cooling water contains a lot of fine sand, after the heat exchange tube bundle has been working for a period of time, the heat exchange tube bundle will be worn to a certain extent under the impact of the cooling water mixed with fine sand, and because the water flow through the tube head is more concentrated , so the pipe head is subjected to the greatest degree of impact and wear, so that the pipe head is often damaged and causes a leakage crisis, which seriously threatens the safe operation of the unit

[0005] In the prior art, the common way to repair the pipeline is to directly replace the entire heat exchange tube bundle or return it to the factory for repair.

If the entire heat exchange tube bundle is directly replaced, not only the cost is huge but also the process is complicated and cumbersome, and the maintenance efficiency is extremely low; if it is returned to the factory, it will not only consume a lot of manpower and material resources, but also affect the thermal power plant for a long time (about 3 months) normal operation of

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