Secondary pump linkage structure

The utility model provides a two-stage pump linkage structure. The two-stage pump linkage structure comprises a first-stage pump pipeline and a second-stage pump pipeline, the second-stage pump pipeline comprises a plurality of second-stage pump branches, the second-stage pump branches are connected in parallel, one or more second-stage pumps, load units and bypass pipes which are connected in parallel are arranged on the second-stage pump branches, the second-stage pumps are connected with the load units, and the bypass pipes, the second-stage pumps and the load units form a loop structure; and the first-stage pump pipeline is connected with the second-stage pump pipeline. The intelligent linkage control system can perform intelligent linkage control on the first-stage pump and the second-stage pump, and has efficient and energy-saving effects. 本实用新型提供了一种二级泵联动结构，包括：一级泵管路；二级泵管路，所述二级泵管路包括若干个二级泵支路，各个所述二级泵支路之间并联，所述二级泵支路上设有一个或多个并联的二级泵、负载单元、旁通管，所述二级泵与负载单元相连，所述旁通管与二级泵、负载单元组成环路结构；所述一级泵管路与二级泵管路相连。本实用新型可对一、二级泵进行智能联动控制