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Altogether32, Every page shows：18article
Install a set of tensioning devices under the cable tray. The galvanized cable tray forms an arch under the tension of the tensioning tendons. This generates compression on the lower cover plate of the tray and tension on the upper cover plate. This force is opposite to the stress caused by external loads, offsetting part of the working force and improving the stress state of the tray. Therefore, the prestressing method aims to reinforce the tray and correct deflection. It is simple and easy to...
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Due to the short circuit of the high-temperature fan outside the cable, short circuits occurred in all parts of the cable. Generally, this is caused by poor cable quality due to wind exposure, resulting in severe damage to the cable at the defective points; however, obvious traces will still remain. Once a short circuit occurs in the cable tray, the entire cable may be burned out, and the slack of the cable at the defective point is slight.
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The production and processing accuracy of stainless steel thin plates can be found in the following specifications: The following content: Direct part length error: when the length is 2.3m, 3mm; When the length is 6 meters, it is 4 mm. The total width error of straight bends: 2mm when the total width does not exceed 400. When the total width exceeds 400mm, it is 3mm. The specification errors of other prefabricated components shall comply with the requirements of Class C in the GB/T1804 standard...
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Bridge frame accessories bring you an understanding of bridge frame accessories: cover plates, connecting parts, screws, elbows, sealing plugs, cover clips, seven-shaped clips, wall brackets, hangers, cross arms, vertical brackets, screws, iron expansion screws, grounding wires, three-piece sets, five-piece sets.
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The design and structure of the large-span bridge frame products are simple and clear, avoiding the use of small parts as much as possible to make the product more integrated. The product has a lustrous appearance, is not prone to rust, and can be safely used in various environments. It is easy and quick to disassemble, solving the problem of long-distance transportation. Adding a layer of aluminum alloy film on the surface can not only prevent the product from rusting, but also enhance its str...
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Most people know nothing about the treatment of bridge frame deformation, but there are two commonly used methods: the prestressed method and the flame correction method.
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The installation of cable trays is a very delicate and complex task. If errors occur during the installation process, it may cause significant safety issues for future use. So, what are the requirements for the installation process of long-span cable trays and how should they be installed?
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Compared with ordinary cable trays, large-span cable trays are much larger in size and weight. Long-span cable trays are not only suitable for indoor overhead cable laying in industrial and mining enterprises such as chemical engineering, metallurgy, power, television, and machinery, but can also be used for underground construction. For instance, cable support for subways and civil air defense projects.
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Compared with ordinary cable trays, long-span cable trays are much larger in size and weight. Long-span cable trays are not only suitable for overhead laying of indoor cables in industrial and mining enterprises such as chemical, metallurgical, power, television, and machinery industries, but also can be used as cable supports in underground constructions, such as subways and civil air defense projects.
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we are here to briefly introduce relevant knowledge about trough cable trays. We believe many people are not familiar with them, so let's take a look! Trough cable tray is the full name of a rigid structural system that supports tight connections between trays, consisting of straight sections, curved sections, components, arms, and ladder hangers. The connection resistance between tray ends shall not exceed 0.00032 ohms, and the grounding holes shall have the insulation coating removed.
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With the increasing number of construction projects such as large office buildings, financial malls, hotels, and stadiums in China, the reasonable layout of the weak current system is undoubtedly a key consideration for architects in the entire project. The emergence of cable trays has played a reasonable, stable, and safe role in the layout of weak current systems. Therefore, the purchase of cable trays cannot be ignored.
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Dexian Metal Products takes you to further understand the differences (application) between trough cable trays and ladder cable trays: High-quality trough cable trays are mainly used for laying wires and cables with small cross-sections but large quantities. Ladder cable trays are mainly used for laying power cables with large cross-sections and small quantities.
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We would like to inform you that the total width and aspect ratio of stainless steel cable trays shall be selected in accordance with the table; the cable filling rate must not exceed the standard values specified in relevant codes and standards. For power cables, the filling rate can be 40-50%, and for control cables, it can be 50-70%. In addition, a spare capacity of 10-25% shall be reserved. The specifications and models of all elbows and fittings shall comply with the layout standards of th...
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When installing a power supply and distribution system with a power disconnect, the longitudinal cross-sectional area of the metal composite material in the cable tray shall not be less than the specified value. When laying an additional grounding main along the entire length of the cable tray, each section of the tray (including non-linear sections) shall be reliably connected to the grounding main at least at one point.
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