Pressure balance compensation assembly and double-insurance internal pressure type balance sealing compensator

The invention relates to the technical field of pipeline sealing compensators, and provides a pressure balance compensation assembly which comprises a first corrugated pipe and a second corrugated pipe, one end of a first connecting pipe is arranged on the inner wall of an end connecting pipe I, the other end of the first connecting pipe is inserted into the second corrugated pipe, one end of a second connecting pipe is inserted into the first corrugated pipe, and one end of a third connecting pipe is arranged on the first connecting pipe; the third corrugated pipe is inserted into the other end of the second connecting pipe, the fourth corrugated pipe is inserted into the other end of the third connecting pipe, one end of the fourth connecting pipe is inserted into the third corrugated pipe, the other end of the fourth connecting pipe is inserted into the fourth corrugated pipe, the compensation sleeve is arranged outside the fourth connecting pipe, one end of the compensation sleeve slides relative to the f