Fault alarm device for high-voltage direct-current transmission line

The utility model discloses a high-voltage direct-current transmission line fault alarm device, which relates to the technical field of line alarm and comprises a box body, the upper end of the box body is fixedly connected with an arc top, the two sides of the upper part of the box body are fixedly connected with water collecting tanks, and the lower ends of the water collecting tanks are fixedly connected with water conveying pipes. The lower end of the water conveying pipe is detachably connected with a water tank. According to the fault alarm device for the high-voltage direct-current transmission line, the arc top, the water collecting tank, the air inlet, the water pump and the cooling water pipe are arranged, water flows back into the water tank again through the other end of the cooling water pipe and can be recycled, and therefore the defect that heat dissipation cannot be conducted is overcome; by arranging a buzzer, an alarm lamp, a fixing block, an infrared transmitting and receiving device, a loc