Development history of hydraulic expansion pipe machines
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Development history of hydraulic expansion pipe machines
The domestic liquid bag hydraulic expansion technology addresses the shortcomings of large size deviations in domestic heat exchange tubes. Drawing on foreign technology and continuously innovating, a new generation of hydraulic expansion machines suitable for China's national conditions have been developed. They have been widely used in the manufacturing of heat exchangers in fields such as petrochemicals, power, boilers, nuclear power, and refrigeration.
Development history
Foreign hydraulic pipe expander: rubber sleeve type.
Production countries: Italy, Japan, etc
Evaluation of Japanese rubber sleeve hydraulic pipe expanders:
Advantages: Multiple trials, high pressure tolerance, and relatively high cost;
Disadvantages: Long production cycle, inconvenient use, long assembly time, and low production efficiency.
Domestic hydraulic pipe expander: liquid bag type.
Main production address: Changzhou
The main components are: metal core rod and high-strength fluororubber elastomer (as shown in the right figure)
Characteristics of hydraulic bag type hydraulic pipe expander:
Advantages: Short production cycle, simple and convenient assembly, high production efficiency, and low cost;
Disadvantage: Heavy and inconvenient for transportation.
Hydraulic expansion pipe machine is a specialized hydraulic expansion joint equipment used for the tight connection of pipes and tube sheets in the manufacturing of heat exchangers, condensers, high-pressure heaters, and other equipment. The use of hydraulic expansion joint technology has the advantages of low manufacturing cost, light labor intensity, short manufacturing cycle, and uniform and reliable expansion joint quality. Hydraulic expansion joint technology has been widely applied in the manufacturing of heat exchangers in fields such as petrochemicals, electricity, boilers, nuclear power, refrigeration, etc., greatly improving the quality and production efficiency of domestic heat exchanger equipment.
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