Constant force output device insusceptible to gas pipe disturbance

A constant force output device insusceptible to gas pipe disturbance comprises a piston, a piston rod, a cylinder barrel, an end cover, a cylinder barrel cover, and an intake sleeve; the intake sleeve comprises a first intake sleeve and a second intake sleeve; the piston rod is connected with the piston; the piston is nested in the cylinder barrel; two ends of the cylinder barrel are sleeved with the end cover and the cylinder barrel cover respectively; the piston rod penetrates the cylinder barrel cover; a small gap is arranged between the piston rod and the inner wall of the cylinder barrel cover; the first intake sleeve sleeves the cylinder barrel; the second intake sleeve sleeves the cylinder barrel cover; the cylinder barrel is provided with first radial orifices evenly along the periphery; the upper edge of the cylinder barrel cover is provided with second radial orifices in even distribution; the piston is provided with a first relief groove; the cylinder barrel cover is provided with a second relief g