High-altitude work safety belt is used to protect the safety protection of the relevant staff is to prevent the fall of staff working at height protection equipment.
The higher the fall, the greater the impulse suffered, the safety belt must achieve 2 standards:
①It can prevent the fall in the human body to a certain degree that can cause disability (that is, it should be able to pull in the human body before a degree, so that it will not fall down again).
The standard must be expressed again is, the human body from a high altitude to fall, such as beyond a certain degree, even if the person pulled with the rope, but because of the great impulse, but also will make the human body internal organs damage and death. Therefore, the length of the rope should not be too long, to have the corresponding degree.
The safety belt in the strength level generally assesses 2 strength index, namely the compressive strength and the impact resistance strength. The national industry standard stipulates the safety belt as well as the string piece of compressive strength (limit tensile strength), must be higher than the net weight in the human body to the longitudinal tensile strength caused by the fall orientation.
The impact strength level stipulates that the impact strength of the safety belt and the spare parts, must be able to bear the impulse caused by the fall of the human body to the fall direction. Generally, the size of the impulse, the key by the weight of the faller and the fall spacing (namely the impact spacing) decision, the fall spacing and the safety belt pendant rope length has a close relationship. The lanyard rope is long, the impact spacing is big, the impulse is also bigger. The basic theory confirms, the human body receives 900 (kg) impulse then to be hurt. Therefore, the safety belt pendant rope length, under the condition of ensuring the use activity, should be limited in the very short scope.
②It must have sufficient strength to bear the impulse when falling inside the human body;.
Various kinds of difference main use will safety belt rope length each set in 0.5-3m. Such as aerial work suspension safety belt, rope length 3m, will 84 (kg) heavy things fall, its impact load can reach 6.5N, is far from disabling impulse is still 3 minutes 1 before and after, can guarantee safety.
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Post time: Nov-18-2021