Drill fire extinguishing device and drill fire extinguishing system, drill bit

A drill fire extinguishing device (1) comprising:

• a tool holder (13) configured to hold a tool or be connected to a tool;
• a fluid connection (110) configured to supply a fluid;
• a turbine (40) including an impeller (42) having at least one stage with a plurality of runner blades (85) and connectable to the tool holder (13) to drive the tool holder (13) in a drive mode in a rotary and/or percussive fashion using the fluid supplied via the fluid connection (110);
• at least one discharge opening (20) in a stationary wall (4) of the drill fire extinguishing device (1) in fluid communication with a fluid chamber (30) downstream of the runner blades (85) of the turbine (40), the discharge opening (20) providing a first flow path (101) to dispense the fluid to a) an area surrounding the drill fire extinguishing device (1);
• a nozzle assembly (12) having one or more nozzles (18) positioned in the stationary wall (4) of the drill fire extinguishing device (1) in fluid communication with the fluid chamber (30) downstream of the runner blades (85) of the turbine (40) to form a second flow path (102), so that after the fluid exits the turbine (40), it is discharged as fire extinguishing fluid into the area surrounding the drill fire extinguishing device (1), wherein the nozzles (18) comprise spray nozzles configured to produce a fine spray;
• and a retractable slider (8) having a first position in which the slider (8) is pulled back to expose the at least one discharge opening (20) and a second position in which the slider (8) is moved forward to cover the at least one discharge opening (20);
• wherein the turbine (40) is an axial turbine or tubular turbine and the fluid connection (110) provides an axial inflow of the fluid into the drill fire extinguishing device (1);and the first flow path (101) has a narrowest point and a first flow path cross-section at its narrowest point;
• the second flow path (102) has a narrowest point of all the nozzles (18) and a cumulative second flow path flow path cross-section at the narrowest point of all the nozzles (18);
• and the first flow path cross-section at its narrowest point is larger than the cumulative second flow path cross-section at the narrowest point of all the nozzles (18), or the first flow path has a flow resistance that is lower than a cumulative flow resistance of the second flow path (102) through all of the nozzles (18).