Patent ID: 11859450
Assignee: SICHUAN UNIVERSITY
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 2:
3. The drilling fluid channel structure of a core drilling rig according to claim 2, wherein the flow diverging and blocking module comprises a valve housing, a lock housing, and a trigger mechanism,
wherein the rear section of central rod extends through the inner cavity of the valve housing that is inside the lock housing, the valve housing comprises a sealing section C and a diversion section, the lock housing further comprises an inflow section B and an outflow section B,
wherein a fluid channel D is disposed between the rear end of the central rod and the inflow section B and a fluid channel E is disposed between the outer wall of the rear section of the central rod and the inner wall of the valve housing, one end of the fluid channel D fluidly communicates with fluid channel B, and the fluid channel E fluidly communicates with the fluid channel D, and the fluid channel E fluidly communicates with the cooling fluid channel,
wherein an inner diameter of the inflow section B is greater than an outer diameter of the sealing section C, and the outer diameter of the sealing section C is longer than the outer diameter of the diversion section, and an inner diameter of the outflow section B is equal to the outer diameter of the sealing section C,
wherein the outflow section B is provided with an outflow hole B, which is connected to the driving fluid channel during operation, before drilling stops, the front end of sealing section C is in the inflow section B, and the fluid channel D and the outflow hole B are connected; after drilling stops, the sealing section C and the outflow section B are in a sealing fit, and the fluid channel D is separated from the outflow hole B.