公开(公告)号：JPH02285195A

公开(公告)日：1990-11-22

申请号：JP8927490

申请日：1990-04-05

Applicant: TAMPELLA OY AB

Inventor： RAUNO RAYAARA

IPC: E21B19/08 ,  E21B7/02 ,  E21B15/00 ,  E21B15/04 ,  E21D9/10

Abstract: PURPOSE: To miniaturize a control unit by connecting it to a drifter and an operating device through a pressure fluid hose and also connecting the control unit to a carrier through a control cable. CONSTITUTION: Pressure fluid supplied through means of a pressure fluid hose 7 connected between a carrier 1 and a control unit 6 is supplied through the control unit 6 to an operating device operating a drifter 5 and hole drilling means. Then, a control cable 9 is connected between a control panel 10 of the carrier 1 and the control unit 6 to open a valve. Thus, piping can be performed easily.

公开(公告)号：JPH02292494A

公开(公告)日：1990-12-03

申请号：JP8927590

申请日：1990-04-05

Applicant: TAMPELLA OY AB

Inventor： RAUNO RAYAARA ,  PAURI RAYAKARIO

IPC: E21B19/08 ,  B25D9/26 ,  E21B44/06

Abstract: PURPOSE: To reduce an operation cost by forming a rock drilling apparatus so that the ratio of a pressure of a pressure fluid supplied to an impact device to that supplied to a feeding device can be adjusted to a specified value by pressure regulating means connected in series to the feeding device. CONSTITUTION: A pressure fluid sucked from a pressure fluid tank by a pump 1 is fed to an impact device through a pressure line 6. When a drill bit touches a soft rock during drilling, a pressure drop occurs in a feed motor 11, and also a pressure drop occurs between a proportional valve 10 and a choke 9. Next, a rapid flow of the fluid to the motor 11 is prevented by the choke 9, a pressure inside a control line 12 is reduced, and the position of a control valve 4 is adjusted so that the volume flow rate of the pump 1 is lowered. When the bit touches a normal rock, a pressure on the supply side of the motor 11 is increased, and a pressure between the proportional valve 10 and the choke 9 is increased until a pressure value to which a pressure relief valve 14 is regulated is reached. In addition, a pressure inside the line 12 is increased, and the volume flow rate of the pump 1 is increased by the control valve 4.