A device for reducing the residual stress of heat exchanger tubes and tube sheet welds
A residual stress, heat exchanger technology, applied in welding equipment, auxiliary welding equipment, welding/cutting auxiliary equipment, etc., to achieve the effect of expanding the scope of application, reducing residual stress, and avoiding model change
Active Publication Date: 2022-03-25
SHANDONG UNIV OF SCI & TECH
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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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Embodiment Construction
[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the present invention is not limited to these embodiments.
[0029] like Figure 1 to Figure 4 As shown, an apparatus for reducing residual stress in heat exchanger tubes and tube sheet welds includes a controller 12, a nozzle system, and a high-pressure water pump 16 for supplying high-pressure water jets to the nozzle system. The function of the controller 12 is to control the operation of the following motors to achieve the purpose of controlling the entire equipment. The following motors are connected to the controller 12 through lines, and the controller 12 issues instructions to achieve the overall reduction of the residual stress of the weld. process.
[0030] The nozzle system includes a nozzle adjuster 7 and three nozzles 5 . The nozzle adjuster 7 includes a connected casing 24 and an end cover 31 . The three nozzles 5 are e...
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The invention discloses a device for reducing the residual stress of heat exchanger tubes and tube sheet welds, including a controller, a nozzle system, and a high-pressure water pump for supplying high-pressure water jets to the nozzle system. The nozzle system includes a nozzle regulator and several nozzles. The nozzle regulator includes a connected shell and an end cover, and several nozzles are evenly distributed along the outer circumference of the shell, and each nozzle is connected to a high-pressure water pump; the device also includes an X-direction drive that drives the shell and the nozzles to translate along the X-axis direction device, a Y-direction drive device that translates along the Y-axis direction, and a Z-direction drive device that moves up and down along the Z-axis direction. The invention utilizes the high-pressure water jet technology to reduce the residual stress of annular weld seams of different diameters in heat exchangers of different specifications, has wide application range, and has good effect of reducing residual stress.
Description
technical field [0001] The invention belongs to the technical field of welding, and in particular relates to a device for reducing residual stress of a heat exchanger tube and a welding seam of a tube sheet. 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 caused by various reasons during the use of the heat exchanger has brought many serious safety problems to the enterprise, and caused immeasurable 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 t...
Claims
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IPC IPC(8): B23K37/00
CPCB23K37/00
Inventor 胡效东祁祥松姜蓉
Owner SHANDONG UNIV OF SCI & TECH