The working principle of the chair lift Why the pressure lift chair explodes

The chair lift is a chair that can adjust the height. Office or study, barber shop is a common chair, free adjustment of height is his advantage, then the working principle of the chair is what , so that Omido Xiaobian for you to resolve the working principle of the chair lift.

Common chair lifts

Pressure lift chair

The pneumatic chair lift is a new type of chair. There is a cylinder inside the lift chair. The up and down movement of the piston rod in the cylinder dictates the lift of the swivel chair. The nitrogen gas is filled in the gas pressure rod. Generally, the purity of the gas is lower than 90%. This may present a safety hazard, and the airtight sealing of the gas pressure rod can also lead to gas leakage. In addition, the material of the gas pressure rod itself is also critical, and if it is used, it may also be unqualified. Causes an explosion.

The reason why it can lift is because there is a gas pressure rod in the lifting device. The gas pressure rod is a kind of elastic element that uses gas and liquid as the working medium and can function as supporting, buffering, braking, height adjustment and angle adjustment. The basic principle is that the interior is filled with high-pressure nitrogen gas. Because there are through holes in the piston, the gas pressure at the two ends of the piston is equal, and the cross-sectional area of the piston is different. One end is connected to the piston rod and the other end is not. Under the action of gas pressure, The pressure on the side with a small cross-sectional area, ie, the elastic force of the air pressure rod, is taken up by the person to pressurize the elevating shaft, and the elevating shaft is gently lowered, and the speed is even and can be reduced to the lowest point. Without lifting the external force of the lifting shaft, the lifting shaft rises back to the highest point.

Hydraulic lift chair principle

Hydraulic jacks The key parts of hydraulic jacks are hydraulically driven by a human-powered hydraulic pump, with the cylinder or piston acting as the jacking element. Hydraulic jacks can be divided into integral and split type. The integrated pump is integrated with the hydraulic cylinder; the separate pump is separated from the hydraulic cylinder and connected with a high-pressure hose in the middle. The hydraulic jack has a compact structure, can lift heavy loads steadily, and has high transmission efficiency. Therefore, the hydraulic jack has a wide application; however, it is prone to oil leakage and it is not suitable for long-term support of heavy objects. If the long-term support needs to use self-locking jacks, screw jacks and hydraulic jacks can be made into multi-stage retractable type to further reduce the height of the profile or increase the distance of the top lift.

There are other mechanical chair lifts. Everyone can understand for themselves that many people here are most concerned about the problem of air pressure chair lifts:

The lift chair is a commonly used swivel chair that controls the seat lift by a pneumatic lever. The seat is divided into seat cushion, air pressure lever and runner 3 parts. Inside the air pressure rod there is a cylinder, and the piston rod in the cylinder moves up and down to dominate the swivel chair. The gas pressure rod is filled with nitrogen. The principle of a pneumatic chair is like a balloon that has not yet reached the critical point of explosion. The internal pressure increases when it is squeezed. When it exceeds the critical point, it may explode. A generally qualified chair will not explode.

There are generally three reasons that cause an explosion:

1. The pressure bar of the chair mainly depends on high-pressure nitrogen gas. Generally, the purity of the gas is lower than 90%. There may be potential safety hazards. Some manufacturers will inject high-pressure air or other gas into the gas pressure rod to save the cost and safety will be greatly reduced.

2. Sealing seals are not strict and can also cause explosions.

3. The firmness of the material of the pressure rod container wall will directly affect the safety of the chair.

How to avoid the chair lift explosion?

1, to choose the formal furniture brand products. Buy products with a qualified mark, do not want cheaper to buy inferior goods.

2, buy a rotating chair, first look at the plastic floor of the rotating chair knot is not strong, and then swivel back and forth swivel chair, good quality swivel chair rotation is more flexible, no tilt.

3. When using the chair, do not rotate it repeatedly. After a period of use, it should be checked in time. Once cracks and signs of loosening are found, they should be promptly repaired and replaced.

4, weight more than 100 kilograms to sit carefully.

The above is the working principle of the chair lift . I hope to help you. If you want to know more about furniture, you can pay attention to the GO Home Information Channel.