Pressure release sample plug

The utility model discloses a pressure release sample plug, including the plug body, a through axial inlet channel is seted up to the plug body, still sets up a radial air outlet channel who is linked together with axial passage simultaneously, set up the needle valve in the inlet channel, the needle valve is shutoff in inlet channel and air outlet channel's junction under the normality. A needle valve axial displacement device, control needle valve axial displacement in inlet channel are connected to the needle valve rear end. Needle valve axial displacement device is the spanner, and the inlet channel rear end outside is stretched out to the wrench rear end. The spanner passes the fixing base of fixing on the plug body simultaneously when stretching out behind the inlet channel port, the hole that supplies the spanner to pass is offered to the fixing base to the hole of spanner and fixing base is screw -thread fit. The utility model discloses can carry out the pressure release in air cock plug department wh