Multi-water hammer hazard protection device for high-lift water lifting equipment and control method

The invention discloses a multiple water hammer hazard protection device for high-lift water lifting equipment and a control method. The multiple water hammer hazard protection device comprises startup protection, protection during unit normal operation shutdown and equipment failure emergency shutdown protection. Start-up protection controls a sectional type hydraulic working valve (10) through a pressure monitoring system, and it is ensured that the pressure of an outlet pipeline slightly fluctuates. When the unit normally runs and stops, protection is achieved by sequentially closing the sectional type hydraulic working valve (10) and the swing check valve (8), and multiple cut-off is conducted. And the equipment failure emergency shutdown protection is controlled by opening and closing a sectional hydraulic working valve (10), a swing check valve (8) and an electric maintenance ball valve (13). By controlling the sectional type hydraulic working valve, the swing check valve and the electric maintenance ba