Protection tooling for inner wall of heat exchange pipe during argon arc welding of heat exchange pipe and pipe plate
A technology for protecting tooling and heat exchange tubes, applied in arc welding equipment, manufacturing tools, welding equipment, etc., can solve the problems of oxidation of the inner wall of the heat exchange tube and elevation of the heat exchange tube
Inactive Publication Date: 2013-11-13
SUZHOU THVOW TECH LLC
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Problems solved by technology
Due to the high welding temperature, the temperature of the inner wall of the heat exchange tube at the weld will also increase, which will easily lead to oxidation of the inner wall of the heat exchange tube corresponding to the weld
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[0008] The present invention will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments.
[0009] Such as figure 1 As shown, the protective tooling for the inner wall of the heat exchange tube during argon arc welding of the heat exchange tube and the tube sheet includes: a protection module 2 where the outer wall is bonded to the inner wall of the heat exchange tube 1, and the protection module 2 is provided with a main channel 3 and a main channel 3 The inner ends of the two sub-channels 4 are connected to the sub-channels 4 diverging to both sides, and the outer ends of the two sub-channels 4 are respectively connected with the inwardly recessed grooves 5 on the outer wall of the protection module 2, and the grooves 5 are connected with the heat exchange The inner wall of the tube 1 forms a cavity for containing the protective gas, and the outer end of the main passage 3 is provided with an air inlet 6 communicating wit...
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Abstract
The invention discloses a protection tooling for the inner wall of a heat exchange pipe during the argon arc welding of the heat exchange pipe and a pipe plate. The protection tooling comprises a protection module, wherein the outer wall of the protection module is pasted with the inner wall of the heat exchange pipe, a main passage is arranged in the protection module, the inner end of the main passage is connected with sub passages branched towards the two sides, the outer ends of the two sub passages are respectively communicated with inwards recessed grooves formed in the outer wall of the protection module, the grooves and the inner wall of the heat exchange pipe form a cavity for accommodating protection gas, and the outer end of the main passage is provided with a gas inlet communicated with a gas source of the protection gas. The protection tooling has the advantages that the structure is simple and practical, and the protection gas is introduced into the cavity formed by the inner wall of the heat exchange pipe and the grooves formed in the protection module, so the inner wall of the heat exchange pipe is not in contact with the air during the welding, and the inner wall of the corresponding heat exchange pipe in the welding part cannot be oxidized through the temperature rise.
Description
technical field [0001] The invention relates to a protection device for the inner wall of the heat exchange tube used in the common argon arc welding of the heat exchange tube and the tube plate in the titanium heat exchanger. Background technique [0002] When ordinary argon arc welding is carried out between the heat exchange tube and the tube sheet in the titanium heat exchanger, the welding torch performs welding operation on the contact part between the outer wall of the heat exchange tube and the tube hole on the tube sheet. Due to the high welding temperature, the temperature of the inner wall of the heat exchange tube at the weld will also rise, which easily leads to oxidation of the inner wall of the heat exchange tube corresponding to the weld. During the use of titanium heat exchangers, once corrosive liquid is introduced into the heat exchange tubes, the oxidation of the inner wall of the heat exchange tubes will affect the normal use of the heat exchange tubes. ...
Claims
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IPC IPC(8): B23K9/32B23K9/16
Inventor 朱海卫张菊平王萍
Owner SUZHOU THVOW TECH LLC