Because of the extremely high pressure, there have been some people dismantle and check the air pressure rod when the piston rod accidentally popped out, near the office of the iron cabinet was even hard shot through, the power of the great as a gunshot! Therefore, non-professional technicians should not dismantle the bar on their own without professional tools and knowledge. The principle of the role of the pneumatic rod to office swivel chairs, for example, the chair's adjustment valve to move, so that the control valve within the pneumatic rod to open the nitrogen pressure cycle from the lower end of the piston into the upper end, and the chair will rise, when the control valve in the pneumatic tube is closed, the position of the piston stays in the set position, the height of the chair that is fixed, and the chair's elevation and decline, only by the chair's adjustment valve to open the pressure valve The chair can be raised and lowered simply by opening the pressure valve through the chair's adjustment valve.
Pneumatic rod is a gas and liquid as a working medium, office chairs can play a support, cushioning, braking, height and angle adjustment and other functions of the elastic element, by the pressure tube, piston, piston rod and a number of couplings, the basic principle is that the internal high-pressure nitrogen gas, because there is a through-hole inside the piston, the piston at both ends of the gas pressure is equal to the cross-section of both sides of the piston different, one end with a piston rod and different cross-sectional area, the other end with a piston rod. One end is connected to the piston rod and the other end is not, under the action of gas pressure, the pressure generated to the side of the cross-sectional area of the small, that is, the elasticity of the pneumatic rod, the size of the elasticity can be set through the setting of different nitrogen pressures or different diameters of the piston rod and set. There is a wide range of products in which pneumatic rods are used all over the world. In addition to furniture (tables, chairs, beds and cabinets, doors and windows), there are also automobile rear doors and windows, mechanical equipment lifting, medical equipment and so on. The number is in the millions, as small as drawers, as large as the luggage compartment doors of airplanes, and even the shock absorbing mechanism of bicycles, all of which are related to the application of pneumatic rods.
But there has never been a high temperature or collision that caused a pneumatic rod device to explode. If there is a malfunction, at most, the control valve is damaged, resulting in the leakage of gas inside the tube, so that the pneumatic rod loses pressure and can not be operated, for more than twenty years, we have never heard of an explosion.
In general, the design of the office swivel chair, the pneumatic rod needs to be matched with the chassis parts to operate normally, that is, the top of the pneumatic rod still has a chassis parts made of iron plate, the thickness of the steel plate is enough to produce a protective effect, and not to the direct harm to the human body.