Patent attributes
A safety angle cock air-bleeding in a multi-mode and having a ball core revolved in a single direction is of switch valves used in a train air brake system. The safety angle cock includes a cock body with a casing, a shaft, a main pipe joint and a hose joint with a locking nose, wherein there is on a upper part of the casing of the cock body a limit stop with a handle mount, a pallet and a ratchet wheel are disposed in the handle mount for controlling rotation of the shaft in a single direction, a small sealing ring is arranged at a hose connection port of the cock body and a large sealing ring at a main pipe connection port of the cock body, and a ball core positioned in the cock body is connected to the lower end of the shaft and provided with a air bleeding slot on each side thereof, the length of the slot being bigger than the diameter of the small sealing ring and smaller than the diameter of the big sealing ring, characterized in that an air bleeding valve for adjusting and controlling air-bleed is mounted at a bottom of the casing of the cock body. The invention adopts multi-level automatic protection technology and can thereby achieve such favorable effects as guaranteeing the safe of train, improving the safe operation level, ameliorating the operating mode, freeing the product from regular maintenance, and lowering the production and application cost.
