J-SHAPED GAS SAMPLING DEVICE

A J-shaped gas sampling device, comprising: a J-shaped pipe (1), wherein a mixing feed pipe (2) is in communication with the left side of the J-shaped pipe (1); a first straight-through valve (3) is mounted at the top end of the J-shaped pipe (1), and a second straight-through valve (4) is mounted at the other end of the J-shaped pipe (1); a liquid discharge branch pipe (5) is in communication with the right side of the J-shaped pipe (1); a third straight-through valve (6) is mounted at the other end of the liquid discharge branch pipe (5); a buffer tank (7) is in communication with the other side of the mixing feed pipe (2); a connection pipe (8) is in communication with the other side of the buffer tank (7); a sealing buffer plate (9) is slidably connected to an inner side of the buffer tank (7); an electric motor (10) is mounted on the inner side of the buffer tank (7); the tail end of a main shaft of the electric motor (10) is fixedly connected to an eccentric wheel (11) ; and the sealing buffer plate (9)