A kind of heat radiation welding device and welding method

A welding method and a technology of a welding device, which are applied in the field of heat fusion welding of large heat exchanger tube sheets, and can solve problems such as the one-time welding process of heat exchangers that cannot be solved

Active Publication Date: 2016-12-07
ZHUZHOU HONGDA POLYMER MATERIALS
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

None of the above existing technologies can solve the technical problems in the one-time welding process of large end plates and multiple tubes (more than 2000 tube bundles) of heat exchangers

Method used

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  • A kind of heat radiation welding device and welding method

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Embodiment Construction

[0024] Such as figure 1As shown, a heat radiation welding device includes a heating element, a welding fixture, a composite cover, and a temperature control system. The welding fixture is connected to the composite cover; when the porous end plate to be welded is installed in the welding fixture, the The welding fixture, the porous end plate and the composite cover plate form an airtight constant temperature chamber; the heating element is installed in the airtight constant temperature chamber, and the temperature control system connects the airtight constant temperature chamber and the heating element. The heating element is composed of a heat pipe 5 and an aluminum mounting plate 6, and the heat pipe is installed on the aluminum mounting plate. The aluminum height adjustment ring 7 is combined with the mold frame strip 8 to form a welding fixture, the molding cavity, the bottom cabinet 9-1 and the bracket 9-2 are combined to form a welding fixture, and the quartz glass obser...

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Abstract

The invention discloses a thermal radiation welding device and a thermal radiation welding method. The thermal radiation welding device comprises a heating member, a welding clamp, a compound cover plate and a temperature control system, wherein the welding clamp is connected with the compound cover plate; the welding clamp, a porous end plate and the compound cover plate form a constant temperature room; the heating member is mounted in the constant temperature room and the temperature control system is connected with the constant temperature room and the heating member. The thermal radiating welding method comprises the following steps: enabling a vertical tube to penetrate through the porous end plate; inserting a soldered pin into the vertical tube; placing the vertical tube in the closed constant temperature room where the heating member is mounted; fusing the porous end plate and a heated end face of the vertical rube from top to bottom under the action of thermal radiation so as to realize the purpose of welding. According to the device and method disclosed by the invention, a tubular plate is firmly welded as a whole, the bore diameter of a welding opening of the vertical tube is invariable, the welding depth of the vertical tube and the end plate reaches two times the thickness of the tube wall, and through hydrapress measurement of 1MPa / cm<2> of a welded product, the product which is pressurized for 30 minutes is free of leakage, so that the process difficulty of welding a big end plate and multiple tubes at one time is successfully solved.

Description

technical field [0001] The invention relates to the technical field of heat fusion welding of tube sheets of super large heat exchangers of melt-processable fluoroplastic polytetrafluoroethylene and perfluoroalkyl vinyl ether copolymer (PFA) applied in the field of thermoelectricity. Background technique [0002] With the rapid development of my country's processing and manufacturing industry, the country vigorously develops clean power such as nuclear power, hydropower, and wind power. Although my country has abundant coal and gas, thermal power produces a large amount of CO, SO2, and PM2.5 soot that pollutes the environment and the atmosphere. , in order to reduce emissions, a breakthrough has been made through the efforts of the majority of scientific and technological workers. According to the research data of consumption reduction and emission reduction data, the heat loss will increase by 20% when the exhaust gas temperature of the thermoelectric system increases by 10-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C65/02
Inventor 朱基贵张鹏
Owner ZHUZHOU HONGDA POLYMER MATERIALS
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