A method for processing plugs in heat transfer tubes of heat exchangers
A processing method and heat exchanger technology, which are applied to the processing field of plugs in heat transfer tubes of heat exchangers, can solve the problems of large processing difficulty and many mechanical equipment, and achieve simple manufacturing process, less mechanical equipment, and improved finished products. rate effect
Active Publication Date: 2018-06-01
STATE NUCLEAR POWER PLANT SERVICE
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Problems solved by technology
This method requires more mechanical equipment, and the processing difficulty coefficient is large
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[0030] The structures, proportions, sizes, etc. shown in the accompanying drawings of the description are only used to match the content disclosed in the description, for those who are familiar with the technology to understand and read, and are not used to limit the conditions for the implementation of the present invention, so there is no Technically, any modification of structure, change of proportional relationship or adjustment of size shall still fall within the scope of the technical content disclosed in the present invention without affecting the functions and objectives of the present invention. within the range that can be covered. At the same time, terms such as "upper", "lower", "front", "rear", and "middle" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the present invention. , the change or adjustment of its relative relationship, without substantive changes in the technical content, should also be...
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The invention provides a machining method for a plug in a heat transfer pipe of a heat exchanger. The machining method comprises the main machining steps that the size of the plug is measured; a sleeve workblank and a cone core sliding block are manufactured; the cone core sliding block is matched with the sleeve workblank; the sleeve workblank well provided with the cone core sliding block is pressed in a die with a mold cavity, the sleeve workblank deforms because of the extrusion action so as to be attached to the cone core sliding block; and finally, the sleeve workblank is taken out of the mold cavity of the die, and a blind hole, the outer wall and the end of the sleeve workblank are machined, and then the finished plug is obtained. According to the machining method, the manufacturing steps are few, a sleeve is matched with the cone core sliding block mainly through one die, mechanical devices related to the machining method are few, and very high precision calculation is not needed; and in addition, the machining method can adapt to manufacturing and machining of plugs with various diameters, and applicability is high.
Description
technical field [0001] The invention relates to a processing method for a plug in a heat transfer tube of a heat exchanger. Background technique [0002] In a nuclear power plant, a heat exchanger is an essential device, and the heat exchanger includes components such as an outer casing and a heat transfer tube, and the heat transfer tube may be broken due to factors such as water flow scouring. In general, defective heat transfer tubes are found to be plugged and repaired. Tube plugging refers to inserting plugs at both ends of defective heat transfer tubes, thereby effectively isolating the damaged heat transfer tubes from the medium of the primary circuit. At present, the pipe plugging methods in various countries in the world mainly include explosion pipe plugging, welding pipe plugging and mechanical pipe plugging. The heat transfer tubes that have been blocked by explosion and welding are difficult to put into use again, and belong to permanent plugging. The mechani...
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IPC IPC(8): B23P15/00
Inventor 程保良张宝军严智张志娟林明峰刘一舟何小林陶林
Owner STATE NUCLEAR POWER PLANT SERVICE