CN-224230822-U - Laser welding finned tube for compressed air heat exchanger

Abstract

The application provides a laser welding finned tube for a compressed air heat exchanger, which comprises a heat exchange tube, wherein a spiral belt is arranged at the outer end of the heat exchange tube, a laser welding point is arranged between the spiral belt and the heat exchange tube, the outer end of the heat exchange tube is wrapped with the air heat exchanger, a base material of the heat exchange tube is a high-strength steel tube, and the spiral belt is made of a metal material with good heat conducting performance. The application solves the problems that the design of the prior screw thread type fin requires a large heat exchange area for a large energy storage project, the number of the used heat exchange pipes is relatively large, and the manufacturing cost of equipment is relatively high.

Inventors

• TANG GENGCHEN
• CAO CHANGYUN
• ZHU YONGQING
• XIN RUI
• CAI ZIJIAN
• ZHA HUAIHUI

Assignees

• 浙江杭真智能科技有限公司

Dates

Publication Date

20260512

Application Date

20250509

Claims (4)

1. 1. The utility model provides a laser welding finned tube for compressed air heat exchanger, includes heat exchange tube (1), its characterized in that, the outer end of heat exchange tube (1) is equipped with spiral band (4), be equipped with laser welding point (3) between spiral band (4) and heat exchange tube (1), the outer end parcel of heat exchange tube (1) has air heat exchanger (2).
2. 2. A laser welded finned tube for use in a compressed air heat exchanger according to claim 1 wherein the base material of the heat exchange tube (1) is a high strength steel tube.
3. 3. A laser welded finned tube for use in a compressed air heat exchanger according to claim 1 wherein the helical ribbon (4) is of a metallic material of good heat conducting properties.
4. 4. A laser welded finned tube for compressed air heat exchangers according to claim 1, wherein the welding step of the laser welding point (3) is: S1, performing surface cleaning treatment on the heat exchange tube (1) and the spiral belt (4) to remove impurities such as greasy dirt and oxide layers, adjusting parameters of laser welding equipment including laser power, pulse frequency, welding speed, spot diameter and the like, fixing the heat exchange tube (1) on a welding fixture, and adjusting the relative positions of the spiral belt (4) and the heat exchange tube (1) to ensure that the heat exchange tube (1) and the spiral belt are tightly attached and the welding gap meets the requirements; S2, performing positioning welding along a preset welding starting position of the heat exchange tube (1) and the spiral belt (4) by adopting a laser beam with low energy density, and arranging positioning welding spots at intervals to ensure that the spiral belt (4) is preliminarily fixed on the surface of the heat exchange tube (1) so as to prevent displacement in the formal welding process; S3, continuously welding the heat exchange tube (1) and the spiral belt (4) according to a set welding path and the optimized laser welding parameters, starting from a positioning welding point, enabling the laser beam to move at a constant speed along the joint of the heat exchange tube and the spiral belt, ensuring that the welding seam is uniform and continuous, monitoring the welding quality in real time in the welding process, and adjusting the welding parameters in time; S4, performing appearance inspection on the welded heat exchange tube (1) to remove splashes and burrs on the surface of the welding line, performing internal defect detection on the welding line by adopting a nondestructive detection method, repairing the detected defects, and performing stress relief treatment on the heat exchange tube (1) to improve the comprehensive performance of the heat exchange tube.

Description

Laser welding finned tube for compressed air heat exchanger Technical Field The utility model relates to the technical field of compressed air heat exchangers, in particular to a laser welding finned tube for a compressed air heat exchanger. Background In a large-sized air compressor cooler, in order to reduce manufacturing cost, a technology of enhancing heat transfer by fins is generally adopted to reduce manufacturing cost, the air compressor belongs to steady-state operation equipment, the fins are generally formed by combining aluminum fins with heat exchange tubes in an expanded joint mode, but the combination of materials is not suitable for the air energy storage industry, the alternating working condition of frequent starting and stopping of the compressor and an expander, that is, the original common fin enhancement mode cannot meet the working condition requirement of the energy storage industry, but the conventional market is provided with a laser welded finned tube which is quite easy to obtain, and the tube type not only can play a role of enhancing heat transfer, but also can meet long-period steady operation under the alternating working condition. In the prior art, in the production process of the thread type fins, at present, the thread type fins with the diameter not higher than 1.2 mm are manufactured on the surface of the heat exchange tube by rolling and extruding on the thick-wall heat exchange tube, the fin is low in degree of wing, a large heat exchange area is needed for a large-scale energy storage project, the number of the used heat exchange tubes is large, the manufacturing cost of equipment is high, and therefore, the improvement is made, and the laser welding fin tube for the compressed air heat exchanger is provided. Disclosure of utility model The utility model aims at solving the problems that the existing design of the thread type fins is that the thread type fins with the diameter not higher than 1.2 mm are manufactured on the surface of a heat exchange tube by rolling and extruding on a thick-wall heat exchange tube, the fin formation is low, a large heat exchange area is required for a large-scale energy storage project, the number of the used heat exchange tubes is large, and the manufacturing cost of equipment is high. In order to achieve the above object, the present utility model provides the following technical solutions: A laser welded finned tube for use in a compressed air heat exchanger to ameliorate the above problems. The application is specifically as follows: The utility model provides a laser welding finned tube for compressed air heat exchanger, includes the heat exchange tube, and the outer end of heat exchange tube is equipped with the spiral belt, is equipped with laser welding point between spiral belt and the heat exchange tube, and the outer end parcel of heat exchange tube has the air heat exchanger. In a preferred embodiment of the present application, the heat exchange tube is a high-strength steel tube as a base material. As a preferable technical scheme of the application, the spiral belt is made of a metal material with good heat conduction performance. As a preferable technical scheme of the application, the welding steps of the laser welding point are as follows: S1, welding preparation, namely performing surface cleaning treatment on the heat exchange tube and the spiral belt to remove impurities such as greasy dirt and oxide layers, adjusting parameters of laser welding equipment including laser power, pulse frequency, welding speed, spot diameter and the like, fixing the heat exchange tube on a welding fixture, adjusting the relative positions of the spiral belt and the heat exchange tube, and ensuring that the heat exchange tube and the spiral belt are tightly attached and a welding gap meets the requirements; S2, performing positioning welding along a preset welding starting position of the heat exchange tube and the spiral belt by adopting a laser beam with low energy density, and arranging positioning welding spots at intervals to ensure that the spiral belt is preliminarily fixed on the surface of the heat exchange tube and prevent displacement in the formal welding process; S3, continuously welding the heat exchange tube and the spiral belt according to a set welding path and the optimized laser welding parameters, starting from a positioning welding spot, enabling the laser beam to move at a constant speed along the joint of the heat exchange tube and the spiral belt, ensuring the uniformity and the continuity of the welding seam, monitoring the welding quality in real time in the welding process, and adjusting the welding parameters in time; S4, performing appearance inspection on the welded heat exchange tube, removing splashes and burrs on the surface of the welding line, performing internal defect detection on the welding line by adopting a nondestructive detection method, repairing the detected defects, and performing stress