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本实用新型包括液压动力系统、增压工作系统和电气控制系统,其特征在于,所述的增压工作系统包括油缸、活塞、拉杆、弹性橡胶体、密封环和背压环,油缸与活塞通过密封圈密封,拉杆的一端与活塞连接,另一端与弹性橡胶体、密封环和背压环组成胀头,所述胀头通过背压环与油缸壁连接。本实用新型所述的胀接机重量轻、成本低、操作方
The utility model comprises a hydraulic power system, a supercharging working system and an electric control system, and is characterized in that the supercharging working system comprises an oil cylinder, a piston, a pull rod, an elastic rubber body, a sealing ring and a back pressure ring, The sealing ring is sealed, one end of the pull rod is connected with the piston, the other end is connected with an elastic rubber body, a sealing ring and a back pressure ring to form a boding head, the bushing is connected with a wall of the oil tank through a back pressure ring. The expansion joint machine of the utility model has the advantages of light weight, low cost and operation side