Tool for inhibiting welding deformation of heat exchanger tube plate

Abstract

The tool is composed of an elastic sleeve, an upper conical pin, a lower conical pin and a nut, the elastic sleeve is inserted into a pipe hole formed after a heat exchange pipe and the pipe plate are welded, a shaft shoulder of the elastic sleeve is tightly attached to a pipe opening, the lower conical pin and the upper conical pin are installed in the elastic sleeve, and the nut is connected with the lower conical pin. The upper conical pin is sleeved on the upper screw of the upper conical pin, the nut is screwed into the screw, and the lower conical pin and the upper conical pin push the elastic sleeve to expand outwards to be tightly attached to the inner wall of the heat exchange tube by screwing the nut, so that a supporting effect is achieved, and overall deformation of the tube plate is prevented. The tool is small in size and small in occupied space, and welding operation is not affected; operation is convenient, and mounting and dismounting are convenient; the specifications and materials of the heat exchange tubes and the tube plates are not limited; the connection mode of the heat exchange tube and the tube plate is not limited, including that the tube opening of the heat exchange tube is higher than the surface of the tube plate, lower than the surface of the tube plate and flush with the surface of the tube plate.

Description

technical field [0001] The invention relates to a tool for restraining welding deformation of heat exchanger tube sheets, which is used for restraining the deformation of heat exchanger tube sheets during welding. Background technique [0002] Heat exchanger is an important equipment in thermal process. It is widely used in chemical, petroleum, power, and refrigeration industries. It is an indispensable equipment to ensure the normal operation of industrial processes. 20% to 40%. The manufacturing quality of the heat exchanger has a huge impact on the production. For example, the design of the falling film evaporator in a ethylene glycol plant requires the flatness of the welded surface of the tube sheet to be 1mm, otherwise the performance of the falling film evaporator may be affected. The ratio of tube sheet diameter to thickness of the falling film evaporator is about 17, about 2300 φ25mm heat exchange tubes are arranged on the tube sheet, and the connection form of the...

AI Technical Summary

Problems solved by technology

In addition, even if the design does not require the welding deformation of the tube sheet, the welding deformation due to improper manufacturing process is very likely to cause problems such as poor sealing and tube pull-off

[0003] The existing anti-deformation measures, such as reducing the welding line energy, adopting a reasonable welding sequence, and using rigid fixing fixtures, etc., are not ideal for the above-mentioned tube sheets with dense welds and large welding volumes, and the rigid fixing fixtures are large in size, affecting welding operation

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