| 摘要 |
The invention relates to a flow rate measurement device (1) for a fire extinguishing apparatus (2) for detecting the flow rate of extinguishing agent or fresh water, comprising a control element (9) which is arranged on a control rod (11), which control element (9) has a substantially conical section (22), and furthermore comprising a housing (25) surrounding the control element (9), wherein the control element (9) is received in the housing (25) so as to be displaceable in the axial direction (31) of the control rod (11). Furthermore, the control element (9) has a cylindrical subsection (23) which is positioned downstream of the conical section (22) as viewed in the flow direction (15) of the fluid for measurement, in which cylindrical subsection (23) of the control element (9) there is furthermore provided at least one recess (27), which interrupts the shell surfaces (28, 29) of the conical section (22) and of the cylindrical subsection (23) of the control element (9). |
