Exchange cock and coke oven heating system

The utility model discloses an exchange cock and a coke oven heating system. The exchange cock comprises a cock body, a first annular oil groove and a second annular oil groove are formed in the two ends of the cock body in the length direction respectively, a cock channel is formed in the cock body, the cock channel penetrates through the cock body, and the cock channel is a gas channel of the exchange cock. A first oil groove and a second oil groove are formed in the positions, on the two sides of the cock channel, of the outer wall of the cock body correspondingly and communicate between the first annular oil groove and the second annular oil groove. The coke oven heating system comprises a flange and an exchange cock installed on the flange. By the adoption of the exchange cock and the coke oven heating system, oil in the oil groove can be rapidly supplemented, the lubrication degree of the exchange cock can be increased, the oil film thickness can be increased for supplementing oil for the cock body conn