Patent ID: 11905775
Assignee: SICHUAN UNIVERSITY
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 6:
7. The driving system for a core drilling rig according to claim 6, wherein the valve housing (31) further comprises a locking section A (313) connected to an front end of the diversion section (312), wherein the lock housing (32) further comprises a locking section B (323) connected to the front end of the outflow section B (322), the inner wall of the outer cylinder (23) is connected to a safety gear (232),
wherein the trigger mechanism comprises a locking sleeve (33), a fixing ring (35), and a safety gear (232), the lock housing (32) passes through an inner cavity of the locking sleeve (33), and an outer wall of the locking section A (313) is provided with a locking groove A (3131),
wherein the locking section B (323) has a locking hole A (3231) and a locking hole B (3232) disposed in front of the locking hole A (3231), the locking hole A (3231) and the locking hole B (3232) are through holes and each contains a locking ball (34) a diameter of the locking ball (34) is longer than a depth of the locking hole A (3231), the locking sleeve (33) includes an impact section (331) and a locking section C (332), an inner wall of the locking section C (332) has a locking groove B (3321) and a locking groove C (3322), the locking groove C (3322) is disposed in front of locking groove B (3321), a distance between the locking groove B (3321) and the locking groove C (3322) is equal to a distance between the locking hole A (3231) and the locking hole B (3232), the fixing ring (35) is affixed on an outer wall of the locking section B (323), and the fixing ring (35) is disposed behind the locking hole A, an inner diameter of the impact section (331) is longer than lithell an outer diameter of the fixing ring (35),
the safety gear (232) includes a clamping part (2321) and a pressing part (2322), an inner diameter of the front end of the pressing part (2322) is shorter than an outer diameter of the impact section (331), an inner diameter of the pressing part (2322) is not less than the outer diameter of the fixing ring (35), an inner diameter of the front end of the clamping part (2321) is shorter than an outer diameter of the rear end of the fixing ring (35), a limit part (36) is disposed at a front end of the central rod (14), and the limit part (36) is disposed in the locking section B (323) of the lock housing (32), an outer wall of the limit part (36) is provided with a locking groove D (361), a fluid channel F (46) is opened to inside of the limit part (36), the fluid channel F (46) is connected to the fluid channel E (45).