High-pressure copper heat exchanger tube water-water heat exchanger set used under coal mine

The utility model provides a high-pressure copper heat exchanger tube water-water heat exchanger set used under a coal mine. The high-pressure copper heat exchanger tube water-water heat exchanger set comprises three shell and tube heat exchangers with full countercurrent flow heat exchanging, wherein the shell and tube heat exchangers are sequentially connected in series from high to low. Each shell and tube heat exchanger comprises a shell, a copper heat exchanger tube bundle, tube plates, baffle plates and channels, wherein the copper heat exchanger tube bundles are arranged in the shells, the tube plates are used for fixing copper heat exchange tubes, the baffle plates are installed in the shells at intervals, and the channels of a Wood seal structure are located in the two sides of each shell respectively. A secondary water inlet and a secondary water outlet are formed in each shell. A cooling water inlet and a cooling water outlet are formed in every two channels. Saddles are arranged on each shell and