Urea injection system

A urea injection system, which comprises:

• a fluid conveying apparatus used for extracting a urea solution from a urea tank,
• a common rail connected to said fluid conveying apparatus,
• a plurality of nozzles connected to said common rail, and
• a controller used for controlling said urea injection system, wherein said common rail comprises a housing, and a pressure detection apparatus and a pressure adjustment apparatus installed on said housing, said housing comprises an inlet passage where a urea solution enters, an outlet passage where the urea solution flows out, a plurality of conveyance ports connected to said inlet passage, and a plurality of return flow ports connected to said outlet passage, said pressure detection apparatus is connected to said inlet passage, said pressure adjustment apparatus is connected between said inlet passage and said outlet passage, said pressure adjustment apparatus is able to connect or disconnect said inlet passage and said outlet passage;
• said urea injection system is also suitable for treating exhaust of a plurality of engines, said plurality of nozzles include a first nozzle used to inject a urea solution into a first exhaust pipe connected to a first engine and a second nozzle used to inject a urea solution into a second exhaust pipe connected to a second engine,
• wherein said housing roughly takes the shape of a cuboid, and comprises a first end face, a second end face, a third end face, and a fourth end face, wherein said first end face is set opposite said second end face, and said third end face is set opposite said fourth end face;
• said inlet passage and said outlet passage run through said first end face and/or second end face, said conveyance port runs through said third end face, and said return flow port runs through said fourth end face.

A urea injection system, which comprises:

• a fluid conveying apparatus used for extracting a urea solution from a urea tank,
• a common rail connected to said fluid conveying apparatus,
• a plurality of nozzles connected to said common rail, and
• a controller used for controlling said urea injection system, wherein said common rail comprises a housing, and a pressure detection apparatus and a pressure adjustment apparatus installed on said housing, said housing comprises an inlet passage where a urea solution enters, an outlet passage where the urea solution flows out, a plurality of conveyance ports connected to said inlet passage, and a plurality of return flow ports connected to said outlet passage, said pressure detection apparatus is connected to said inlet passage, said pressure adjustment apparatus is connected between said inlet passage and said outlet passage, said pressure adjustment apparatus is able to connect or disconnect said inlet passage and said outlet passage;
• said urea injection system is also suitable for treating exhaust of a plurality of engines, said plurality of nozzles include a first nozzle used to inject a urea solution into a first exhaust pipe connected to a first engine and a second nozzle used to inject a urea solution into a second exhaust pipe connected to a second engine,
• wherein said fluid conveying apparatus comprises an integrated cabinet, a pump installed in said integrated cabinet, an inlet pipeline connected to said pump, and an outlet pipeline connected to said pump, said pump comprises a motor located at the bottom, a pump head located at the top, and a magnetic coupling portion located between said motor and said pump head, said pump head, said magnetic coupling portion, and said motor are arranged from the top down, and a U-shaped flow path and a gear mechanism located in the very bottom of said flow path are provided in said pump head.

A urea injection system, comprising:

• a fluid conveying apparatus used for extracting a urea solution from a urea tank,
• a plurality of nozzles used for injecting a urea solution into the exhaust pipe,
• a plurality of urea solution distribution connectors connected between said fluid conveying apparatus and said plurality of nozzles, and
• a controller used for controlling said urea injection system, wherein said urea injection system is also suitable for treating exhaust of a plurality of engines, said plurality of nozzles include a first nozzle used to inject a urea solution into a first exhaust pipe connected to a first engine and a second nozzle used to inject a urea solution into a second exhaust pipe connected to a second engine;
• said urea injection system comprises a first inflow pipe and a first return flow pipe connected to the first nozzle, and a second inflow pipe and a second return flow pipe connected to the second nozzle;
• said plurality of urea solution distribution connectors include a first tee connector and a second tee connector connected in series, wherein said first tee connector is equipped with an outlet connected to said first inflow pipe, and said second tee connector is equipped with an outlet connected to said second inflow pipe.