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The role of the tube expansion machine

There are thousands of heat exchange pipes inside the heat exchanger, and the connection between the heat exchange pipe and the tube plate adopts argon arc welding. Due to the large thickness of the tube plate, it is impossible to completely weld the hole between the tube plate and the heat exchange pipe, and there is a gap. The wall of the heat exchange tube is thin and slender, and the coolant has a certain pressure, which is easy to cause the tremor of the heat exchange tube. For a long time, the welding joint is easy to break off welding. To prevent this accident, it is necessary to eliminate the gap between the tube plate and the heat exchanger (0.3mm-0.4mm). The gas-liquid pipe expansion machine is used to solve this problem.

The gas-liquid pipe expansion machine makes the pipe elastic and plastic deformation by high pressure expansion technology. In the process of pipe expansion, the outer diameter of the pipe is attached to the inner diameter surface of the tube plate hole, and the tube plate should also undergo elastic and plastic deformation. When the pressure is released, the elastic recovery of the tube plate is greater than that of the tube, so that there is a very strong and uniform bond at the joint.

The pneumatic hydraulic tube expansion machine is composed of three parts: electric control part, gas drive booster system and expansion connector.

Tube expansion machine booster station

The supercharging station is used for the pneumatic expansion equipment for the tube expansion and tight connection of the double coil type cooler. It is widely used for the expansion and tight connection of tubes and tube plates in the manufacture of heat exchangers, condensers, high pressure heaters and other equipment. It has the characteristics of durability, safety, stability and easy operation.

Features

• Working medium: water

• Maximum working pressure: 4000bar

• The equipment is driven by compressed air, and the pressure control output is carried out through the program automatic control proportional control valve. The pressure sensor collects the pressure signal and gives feedback in time to ensure the control accuracy and system safety.

• The high pressure pipeline part adopts LP high pressure connection form to ensure that the equipment has no leakage, convenient disassembly and safe and reliable;

• The program control part adopts PLC automatic control operation mode, displays the test time and pressure in real time, and the test data can be automatically saved and printed.

• The equipment has the functions of overpressure, overload protection and power failure protection, which can ensure the safety of experimental personnel and equipment to the maximum extent.