With the arrival of chairs, the variety of chairs is growing, and they are used as a tool for resting, studying and working. An air pressure chair is part of a chair, and a good quality air pressure chair does not create a safety hazard and, if it is purchased, it may cause an explosion if it is less than 90 per cent pure. It is therefore important to select the appropriate air-pressure chair from the regular manufacturer。
Pressure chair working principles
Air pressure rises and drops are controlled mainly by gas cylinders on chairs, which consist mainly of upper and lower caps, pistons, pistons and cylinders. When manufacturing chairs, the manufacturer fills the tank with a certain amount of gas. Theoretically, the cylinders should be filled with inert gases such as nitrogen gas, and when the human body sits on the chair and puts pressure on the piston through the piston pole, then pressure the gas inside the cylinder. The gas is pressured, the height of the chair decreases and, on the contrary, rises. It has a weight test and a shock test of 200 kg。
Why does the pressure chair explode
1. Air pressure poles in chairs are mainly raised or lowered by high-pressure nitrogen gas, and generally less than 90 per cent of the gas purity is likely to pose a safety risk, with some manufacturers pouring the pressure rods into high-pressure air or other gases at reduced cost。
2. The seals are not sealed and can also lead to explosions。
3. The strength of the wall mass in the pressure rod directly affects the safety of the chair。
Security hint
1. The choice of formal products. Purchase of products with qualified markings, with no incentive to purchase poor quality。
2. Buy a rotating chair, first looking at the plastic floor of the rotating chair, which is stylish, and then slides back and forth and turns the rotating chair, which is of good quality and is more flexible and not tilted。
3. The chair is not rotated repeatedly when used. After a certain period of time, inspections should be carried out in a timely manner and should be repaired and replaced as soon as signs of fragmentation and relaxation are detected。
4. Be careful to sit over 100 kg。
Domestic pressure chair standards
The qb/t 2280-1996 " rotation chair " standard for metal chairs was established in 1996 and officially implemented on 1 september 1997. The standards provide for the terminology, classification, basic technical requirements, testing and testing methods for wheelchairs. However, the currently widely used air pressure lift chair is a product that was upgraded from a spiral chair around the year 2000, with production techniques first imported from foreign countries, while parts such as lift and lift rods are not provided for in the 1996 edition standards, thus preventing targeted testing and testing. In 2007, the ndc issued the qb/t 2280-2007 " office chairs " standard to replace the " chair rotation " standard, which was implemented on 1 march 2008。
The price of a pressurized chair is not too expensive, and we can usually buy better. When we choose to buy a pressurized chair, we can look at its quality from the balance of the pressure chair, which is a quality product if its wheels are flexible and have more heavy wheels. And, of course, we also need to check the air mobility pole at the bottom of the pressure chair, which, if it is not fitted with a steel shield, is a poor quality air pressure chair, which must not be bought, bearing in mind the careful choice。
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