Pipeline frost cracking prevention device and urea metering pump thereof

• Main Authors: NIU JINGHONG, LIU XIAOJIAN, FENG BIAO, BI MINGSONG, LI BO
• Format: Patent
• Language: Chinese; English
• Published: 23.07.2019
• Subjects: BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; WEAPONS

The utility model relates to a device for preventing frost cracking of a pipeline and a urea metering pump thereof, which press a compression body on the other side of a piston by utilizing acting force on the piston when liquid in the pipeline is frozen, so that the piston moves and releases a certain space to the frozen liquid in the pipeline, and a pipeline system is effectively prevented frombeing cracked by expansion when the liquid pipeline is frozen. Meanwhile, the device for preventing the pipeline from frost cracking is arranged on a closed pipeline when the urea solution in the ureametering pump is frozen; when the urea solution in the pipeline is frozen, the stress on the side of the piston compression body is smaller than that on the other side of the piston compression body,so that the problem that the urea solution pipeline of the urea metering pump cracks a pipeline system during freezing is thoroughly solved, and the reliability of the urea metering pump is greatly improved; besides, when the