Modern office chair MODEL-1

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Modern office chair MODEL-1

Q: What are tensile and shrink wrapping?: Shrink wrap (shrink wrap) is the use of shrink film wrapped items (or inner package), and then the film proper heating treatment, so that the film shrink and cling to the goods (or inner package) packaging technology. Shrink film is a specially stretching and cooling treatment of polyethylene film, because the film residual tensile stress in the directional contraction, the stress is heat will be eliminated, so that the horizontal and vertical were sharp contraction, while the film thickness increases, the shrinkage rate is usually 30% to 70%. The contraction force reaches the maximum value at the cooling stage, and can keep for a long time.

Q: What is a limiter?: Mainly for the protection of the safe operation of the pipeline, has the following functions: compensating absorption pipeline axial and transverse and angular deformation; absorption equipment vibration, reduce the vibration on the impact of pipeline equipment; deformation of the pipeline, absorb seismic subsidence. The utility model relates to a limit extension device, in order to improve the service life of the telescopic device, and a position limiting device is added at both ends of the expansion device. During stretching, the expander is damaged in order to avoid excessive stretching. A device for limiting tension is added at both ends of the expansion device. So it's called limit extension device. 1, the expansion device should check its type, specification and piping configuration before installation, must comply with the design requirements.

Q: How to achieve telescopic power arm: Pneumatic, cylinder. There is an electromagnetic valve, an air compressor.

Q: The working principle of the bolt tensioner: A bolt tensioner consists of a hydraulic pump, a high pressure hose, a pressure gauge, and a stretched body. The hydraulic pump is the power source, the pressure meter reflects the output pressure of the pump, and the high pressure hose is connected with the hydraulic pump and the drawing body. A drawing body is an actuating element for realizing a bolt stretching. The utility model is mainly composed of a piston cylinder, a piston, a supporting bridge and a stretching nut.

Q: Mechanical structure and principle of automatic focusing lens for camera: From the basic principle, AF can be divided into two categories: one is based on the camera and photographed location AF target distance between measurement and another is based on the focus screen clear focus imaging detection.

Q: What are the main uses of a bolt tensioner?: Stretch, fasten, or loosen the bolts and think of the bolts as a rubber band,

Q: Mechanical principle of belt expansion machine: Principle: the telescopic belt conveyor adds a telescopic mechanism to the ordinary belt conveyor, so that the belt conveyor can be freely extended in the length direction.

Q: What is a bolt tensioner? How do you use it?: The bolt tensioner is a tool for fastening and dismounting bolts. It has several forms, such as manual, electric, pneumatic, hydraulic and so onBolt tensile bolts and shear bolts, tensile bolts subjected to tensile load is axial load; shear bolts subject to shear load, tangentialThe bolt load is the force acting on the bolt, which is usually expressed by pressure, that is, the force / force acting areaThe so-called pre tightening force is a force in the mounting bolt in the bolt on the pre action (Ya Qiang), its role is to enable the bolt force and deformation, the fasteners are combined together, and can prevent the bolt fracture under impact load.Note: the preload and bolt load are less than the rated load of the bolt

Q: How do you pull the contracted muscles with a mechanical device?: Common causes of muscle spasms: fatigue: when the body is tired, the normal physiological functions of the muscles change, and at this point, the muscles will have a lot of lactic acid accumulation, and constantly stimulate muscle spasm. Electrolyte imbalance: a large amount of sweat during exercise and a large amount of electrolyte loss. The main components of sweat are water and salt, and losing too much salt can cause muscle tension and cramping. Cold stimulation: in cold climates, such as swimming, it is stimulated by cold water, especially when the preparation is inadequate, and muscles tend to spasm. How to do it: when a muscle spasm occurs, it usually relieves the spasm by pulling the spastic muscles in the opposite direction. Attention should be paid to keeping warm during the process. When pulling, the force should be uniform, and the violence should not be avoided, so as to avoid muscle strain. Abdominal muscle spasm, you can do the back stretch to lengthen the abdominal muscles, you can also abdominal hot compress and massage. When the calf muscle spasm, can unbend the knee joint, brings back the toe, simultaneously holds the foot with both hands, forcibly upward draws.

Q: What is the automatic telescopic function of an automatic umbrella?: When the intermediate slider is moved upwards, the switch is moved upward to prevent the spring 2 from compressing the spring at the lower dead point position and the elasticity does not reach the maximum value. Only when the switch force is slightly greater than the maximum value of spring 2 elasticity, the convex switch is retracted, and the middle slider begins to move up.B. when the middle slider moves down, the upper half of the convex switch is smaller, so that the spring 1 has sufficient elasticity to make the middle slide switch locked by the convex point switch. And 2, 3 is not enough to cause the umbrella middle slider has been declining.

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