Abstract: Disclosed are a sleeve grouting device and method for prefabricated building, relating to the technical field of engineering construction. The grouting device includes a sleeve, a driver and an oscilloscope, sleeve openings at two ends of the sleeve each are configured to be penetrated by connection rebars of each of two different prefabricated components, a piezoelectric ceramic is provided horizontally at each of the sleeve openings at two ends of the sleeve, a corresponding one of the piezoelectric ceramics is electrically connected to the driver and another corresponding one of the piezoelectric ceramics is electrically connected to the oscilloscope; a bottom end of the sleeve is connected to an inlet pipe to be communicated with a g grout injection equipment, and a top end of the sleeve is connected to an outlet pipe.

Abstract: Disclosed are a prefabricated energy pile, a construction method and a heat pump heat exchange system. The energy pile includes a pile body and a heat exchange pipeline. The pile body includes a stainless steel pipe, a metal lining pipe extending within the stainless steel pipe and a concrete pipe between the metal lining pipe and the stainless steel pipe. A heat conductor between the stainless steel pipe and the metal lining pipe is in contact connection with the stainless steel pipe and the metal lining pipe. The heat exchange pipeline includes a first pipe section and a second pipe section in communication with each other, through which a heat exchange medium flows in turn. Tops of the first pipe section and the second pipe section protrude upward out of the energy pile. The second pipe section is in contact connection with the metal lining pipe.