Device for reducing residual stress of welded seam of tube and tube plate of heat exchanger

Abstract

The invention discloses a device for reducing residual stress of a welded seam of a tube and a tube plate of a heat exchanger. The device comprises a controller, a nozzle system and a high-pressure water pump for supplying high-pressure water jet to the nozzle system; the nozzle system comprises a nozzle regulator and a plurality of nozzles; the nozzle regulator comprises a casing and an end cover which are connected, and the multiple nozzles are uniformly distributed in the circumferential direction of the casing and are all connected with the high-pressure water pump; and the device further comprises an X-direction driving device, a Y-direction driving device and a Z-direction driving device, wherein the X-direction driving device drives the casing and the nozzles to move horizontally in the X-axis direction, the Y-direction driving device moves horizontally in the Y-axis direction, and the Z-direction driving device lifts in the Z-axis direction. According to the device for reducing the residual stress of the welded seam of the tube and the tube plate of the heat exchanger, a high-pressure water jet technology is used to reduce the residual stress of the annular welded seam with different diameters of different sizes of the heat exchangers, the application range is wide, and the effect of reducing the residual stress is good.

Description

technical field [0001] The invention belongs to the field of welding technology, in particular to a device for reducing the residual stress of heat exchanger tubes and weld seams of tube sheets. Background technique [0002] A heat exchanger is a device that transfers part of the heat of a hot fluid to a cold fluid, also known as a heat exchanger. Heat exchangers play an important role in chemical, petroleum, power, food and many other industrial productions. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators and reboilers, etc., and are widely used . At the same time, the failure of the heat exchanger due to various reasons during the use of the heat exchanger has brought many serious safety problems to the enterprise, and caused incalculable economic losses at the same time. Therefore, it is particularly important to prevent the failure of the heater. [0003] The main failure mode of the heat exchanger is the failure of the...

AI Technical Summary

Problems solved by technology

[0004] Using high-pressure water jet technology to reduce welding residual stress is an emerging method. Compared with traditional methods, it has good strengthening effect, low cost, no pollution, easy automation and easy strengthening of narrow and deep groove parts, etc. Many advantages, because there is no mature equipment, this method has not yet been applied in industry

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