Diesel engine cooling water pipeline system

The invention discloses a diesel engine cooling water pipeline system which comprises a water inlet and a cooling water ring connected with a water outlet of a water pump. A water outlet of the cooling water ring is communicated with an intercooler and/or a heat exchanger. The cooling water ring comprises a conventional channel and an emergency access. The conventional channel and the emergency access are provided with pressure reducing valves for adjusting pipeline pressure and ball valves for controlling pipeline opening and closing. According to the diesel engine cooling water pipeline system, when cooling water flow is not sufficient and heat exchanging requirements cannot be met due to a pipeline problem or maintaining and the like, the emergency access can be opened, the fact that cooling water smoothly passes and reaches the intercooler or the heat exchanger is guaranteed, the purpose of cooling on cooling liquid obtained after temperature rising is achieved, and then cooling of the diesel engine is guaranteed. Cooling water amount can be controlled manually, cooling water amount is guaranteed effectively, the condition that diesel engine cooling is poor caused by insufficient cooling water amount is avoided, and the emergency feature of a diesel engine for fire protection is guaranteed.