Rainproof cap for directly-buried ground steam pipeline

The utility model discloses a rainproof cap for a directly-buried ground steam pipeline. The rainproof cap further comprises a clamping hoop and a rainproof cap body, wherein heat insulation materials are attached to the interior of the clamping hoop, and the rainproof cap body is arranged outside the clamping hoop in a sleeving mode and fixedly welded to the clamping hoop. The clamping hoop is fixed to the outer surface of the upper working pipe through a fastener, a heat preservation material is arranged on the outer side of the upper working pipe located above the clamping hoop, and an outer protection plate is arranged on the outer side of the heat preservation material. The upper surface and the lower surface of the rainproof cap body are fixedly connected with a circle of inner water stop ring arranged along the outer side of the outer protection plate and a circle of outer water stop ring arranged along the outer edge of the rainproof cap body respectively. According to the rain-proof cap for the direc