Peripheral frame for plate heat exchanger and using method of peripheral frame

The invention discloses a peripheral frame for a plate heat exchanger, and relates to the technical field of heat exchangers, the peripheral frame comprises a front end plate and a rear end plate, the front end plate and the rear end plate are connected through a guide rod group, a plurality of plate sheets are assembled between the front end plate and the rear end plate, and a plurality of bolt rods are arranged on the peripheries of the front end plate and the rear end plate. The guide rod set comprises an upper guide rod and a lower guide rod which are distributed in parallel, the upper guide rod and the lower guide rod are connected through a supporting column, and a cleaning assembly is installed on the surface of the upper guide rod. According to the technical requirements, a cleaning assembly is designed on an upper guide rod, a driving air cylinder is used for completing downward driving operation on all inserting pieces, a user can select the number of the inserting pieces according to the number of