公开(公告)号：US20240271488A1

公开(公告)日：2024-08-15

申请号：US18436243

申请日：2024-02-08

Applicant: SANDVIK MINING AND CONSTRUCTION OY

Inventor： Jarno VIITANIEMI ,  Pertti PARKKINEN ,  Martti LESKINEN ,  Mikko HAMALAINEN ,  Perttu KOIVUMAKI ,  Timo KELA ,  Ville KOHOLA

IPC: E21B7/02

CPC classification number: E21B7/022 ,  E21B7/025

Abstract: An arrangement and method for heating an impact device of a rock treating machine (Rtm) in low-temperature operating conditions is provided. The arrangement includes a warm-up mode (WM) for feeding pre-heated hydraulic fluid through a feed channel to a hydraulic circuit of the impact device. One or more hydraulic accumulators are provided in the hydraulic circuit. The feed channel is provided with a control element for limiting the feeding of the pre-heated hydraulic fluid during the warm-up mode. The control element limits the feeding of the pre-heated hydraulic fluid in the feed channel so that separating elements of the pressure accumulators do not move.

公开(公告)号：US20250154836A1

公开(公告)日：2025-05-15

申请号：US18722721

申请日：2022-12-09

Applicant: SANDVIK MINING AND CONSTRUCTION OY

Inventor： Perttu KOIVUMAKI ,  Jarkko UOTILA ,  Eero VISKARI ,  Visa TOPPINEN

IPC: E21B19/16 ,  E21B17/042

Abstract: A control system, rock drilling rig and method for controlling coupling measures is provided. The control system is arranged for controlling coupling and uncoupling measures of a threaded coupling of a rock drilling tool. The control system is configured to detect initial minimum feed force required for moving a rock drilling apparatus in forward direction and is configured to implement the detected minimum feed force during the coupling.