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

Claim 3:
4. The drilling fluid channel structure of a core drilling rig according to claim 3, wherein the valve housing further includes a locking section A connected to the front end of the diversion section, the lock housing further comprises a locking section B connected to the front end of the outflow section B,
wherein the trigger mechanism comprises a locking sleeve, a fixing ring, and a safety gear, the locking sleeve being disposed is inside the outer barrel,
wherein the lock housing passes through an inner cavity of the locking sleeve, and a safety gear is connected to an inner wall of the outer barrel,
wherein the outer wall of the locking section A is provided with a locking groove A, wherein the locking section B has a locking hole A that is a through hole a locking ball is disposed in the locking hole A,
wherein a diameter of the locking ball is greater than a depth of the locking hole A, the locking sleeve comprises an impact section and the locking section C, an inner wall of the locking section C has a locking groove B, and the fixing ring is affixed on the outer wall of the locking section B,
wherein the fixing ring is disposed behind the locking hole A an inner diameter of the impact section is larger than an outer diameter of the fixing ring
wherein the locking section C is disposed in front of the fixing ring, and the safety gear comprises a clamping part and a pressing part, and an inner diameter of the front end of the pressing part is smaller than an outer diameter of the impact section, and an inner diameter of the pressing part is not less than the outer diameter of the fixing ring, wherein an inner diameter of the front end of the clamping part is smaller than the outer diameter of the rear end of the fixing ring, and
wherein a limit end is provided at the front end of the rear section of the central rod, and the limit end is disposed in the locking section B and in front of the locking section A.