2012年6月20日星期三

Strand anti-fall device product technical analysis


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Anti-dropping device used by the electricity sector is broadly divided into two categories: First, the track type, track type was divided into the tube Orbital groove track type , these two methods are the first corner of the tower to install specially designed track, the operating personnel brake wheel up and down the tower will be connected to the ring of security group card (inserted) into orbit, fall protection function. These two tracks fall prevention device at the same time there are several shortcomings:
A rail mounting difficulties. Outdoor Tower general height of 15 meters above, install the hard track 10 meters or even tens of meters to corner of the tower, and meet the requirements of the process and intensity, the degree of difficulty can be imagined.
B, and costly. The tube-shaped track must be used between the tube structure in the two above and two tube connection structure to achieve a continuous orbit, steel consumption volume. Recessed track made from high-strength alloy, single m very expensive. Both tracks require a fixed firmly wi th the tower, fixed points, the installation cost is also high.
C, inconvenient to use. The two tracks anti-dropping device, brake wheel structure is complex, and more portable for workers, increase the labor intensity of the operating personnel.
D, post-maintenance volume. Tubular track and more control for hot-dip galvanizing, the track is generally 6 meters long, the scene more than $ root splicing can not be a good solution to both ends of the block, tube inner wall is prone to corrosion, groove track alloy material, although a good solution to the problem of corrosion groove inner diameter of the outdoor nudity is very likely to cause the tank fouling and affect the normal use, you must periodically clear slot.
E, its own security is not high. Tube type track material consumption a large amount of alloy village material is expensive, and can easily become the target of theft.
        Differential. It is similar to t he car to use seat belts, generally by the shell, spring plate, centrifugal cards, cables, or a special soft rope, anti-fall device in the upper and lower altitude operations personnel security there are several difficulties:
        A high cost. Spring plate, strand, or a special soft rope must be to reach the tower height requirements, manufacturing costs can be imagined.
        B, differential devices must be winding plate fixed to the tower, the upper strand or a special soft rope fixed in the tower lower part of the whole process to achieve the anti-fall, spring plate can not be solved long-term loss of elasticity and strand or a special soft rope rust and corrosion problems.
        C, a device by only one person to use, not the practicality of anti-dropping.
        Such devices are generally limited to workers protection when working at height transposition.
        Therefore, research and development and promote the use of low-cost, safe, reliable, practical and convenient high-altitude anti-fall device is not only the objective needs of the aerial work sector will also have a good social and economic value. In this case, our \"strand high-altitude anti-fall device to follow the above design principles have emerged.

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