MEASUREMENT NEEDLE WITH CHECK VALVE FUNCTION Russian patent published in 2015 - IPC G01L19/00 F16L29/02 F16L37/42 F16K15/00 

FIELD: measurement equipment.

SUBSTANCE: invention relates to measurement equipment and is designed to measure pressure and/or temperature of fluid, for instance, in a heating or cooling system. A device included into a system for measurement of pressure and/or temperature of fluid represents a complete measurement needle (1). The needle (1) includes a body (6) with a nipple of a hose (7) for connection of a measurement hose (5). In the body (6) there is a check valve (8), a return spring (13), a probe (10) and a springy split washer (15). The check valve (8) moves in the cavity (20) of the body (6) since the needle (1) is mounted on the measurement nipple (3), and by means of this communication opens for the liquid through the first hole (11) into the probe (10), through the probe (10) and further via the second hole (12) of the probe to the check valve (8) and its central part (21). The check valve (8) in the position provided for measurements includes a hole (26) for communication from the probe (10) via the body (1) and nipple of the hose (7) and further via the hose to the measurement device. Open communication is immediately closed, as soon as the measurement is over, and the measurement needle (1) is removed from the nipple.

EFFECT: invention is aimed at increased tightness of the device due to prevention of fluid leak.

11 cl, 3 dwg