Longitudinally welded fin heat exchange tube

1. What are the longitudinal welded fin heat exchange tubes?

Longitudinal welded fin heat exchange tubes are parts of general heat exchange or heat transfer equipment, especially heat exchange tubes with longitudinally extending fins that increase the heat transfer area.

2. Whats the manufacturing method of longitudinally welded fin heat exchange tube

Background technology of longitudinally welded fin heat exchange tube:

At present, the finned tubes used for gas, water, and steam heat exchangers are L-shaped finned tubes, spiral finned tubes, H-shaped finned tubes and other transverse finned tubes, which have large resistance and low heat transfer coefficient. Disadvantages, resulting in higher equipment costs and operating costs. The longitudinally welded fin heat exchange tube adopts a longitudinal fin tube integrally bundled with aluminum alloy. The outer edge shape of the radial cross-sectional view is rectangular. Each fin heat exchange tube is connected by a header, which eliminates the need for tube plates and improves The space utilization rate and the gas flow direction are parallel to the heat exchange tube, which has the advantages of low resistance and high heat transfer coefficient. However, the material properties of aluminum alloy determine that it cannot be used in high temperature and high pressure environments, and the connection with carbon steel pipes is complicated.

Longitudinally fin tube Utility model content

In order to overcome the inadequacy that the existing longitudinal finned tubes made of aluminum alloy integrally rolled cannot be used in high temperature and high pressure environments, a longitudinal welded fin heat exchange tube is used. The longitudinal welded fin heat exchange tube not only has low resistance but also has a heat transfer coefficient High advantages, and can withstand high temperature and pressure, corrosion resistance, and improve equipment life.

The technical solution adopted by the longitudinally welded fin heat exchange tube to solve its technical problems is a longitudinal welded fin heat exchange tube, which includes a circular heat exchange core tube and longitudinal fins, and is characterized by the periphery of the circular heat exchange core tube Laser welding at least 4 pieces of V-shaped longitudinal fins that are symmetrically distributed up and down with the center line as the axis of symmetry, and the connecting lines of the outer ends of the longitudinal fins are rectangular in the cross section.

The circular heat exchange core tube and the longitudinal fins are made of carbon steel, stainless steel or titanium alloy.

The beneficial effect of the utility model is that because the cross section of the longitudinal fin heat exchange tube is rectangular, it can be easily assembled into heat exchange equipment, the tube plate is omitted, the space utilization rate is improved, the air flow direction is parallel to the heat exchange tube, and the resistance is small. , Not easy to accumulate dust, easy to clean. Using laser welding, the thermal resistance between the fin and the heat exchange tube is almost zero, which improves the heat transfer coefficient. Use carbon steel, not Stainless steel, titanium alloy and other materials, can withstand high temperature and pressure, corrosion resistance (carbon steel longitudinal finned tube After the welding is completed, it can be treated with a galvanizing process) to improve the life of the equipment.

longitudinally welded fin heat exchange tube