Method for replacing piston ring of reciprocating piston pump

The invention discloses a reciprocating piston pump piston ring replacement method which comprises the steps that a piston ring is installed from the tail of a pump, the piston ring can be installed without clamping a packing table, and packing is hooped by a guide cylinder and inserted into an air cylinder according to the characteristics of the piston ring. According to the method, parts such as a cylinder and a suction valve and a sealing gasket of the pump do not need to be disassembled and assembled, replacement of multiple sealing red copper gaskets due to complete disassembly of the pump body is reduced, the overhaul technological process is simplified, consumption of quick-wear spare part red copper gaskets is reduced, the overhaul period is shortened, and the defects of liquid leakage, no upward pressing and the like are overcome after overhaul through the new method; and one-time test run success is achieved. 本发明公开了一种往复式活塞泵活塞环更换方法，包括：从泵尾安装活塞环，只需活塞环不要卡填料台即可进行安装，结合活塞环的特点只需用导筒将填料箍好了插入气缸即可。本发明的方法省去拆装气缸及