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Problems of the temperature of the bridge of the transmission line
Due to changes in the ambient temperature, the steel cable tray will expand and contract. The outdoor cable tray is greatly affected by temperature. For example, the maximum ambient temperature is 40 ℃ and the minimum temperature is -20 ℃, then the maximum shrinkage of the cable tray is calculated as follows:
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Selection of cable bridge type and variety
1. When the cable network that needs to be shielded from electrical interference or the external protection (such as corrosive liquid, flammable dust, etc.) is required, the (FB) slot type composite anticorrosive shielded cable bridge (with cover )
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What is the correct choice for seismic support hangers?
We all know that the main function of longitudinal earthquake support is to mitigate the damage caused by earthquakes. Their seismic fortification strength can reach six to nine levels. There are many brands that can produce longitudinal seismic support for bridges. What kind of anti-seismic support and hanger manufacturers are selected for those in need?
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How to fix the pipe support and hanger?
Before installing the pipe gallery support and hanger, you must first design the installation location to ensure that the pipe installation is stable, and ensure the correct use of the pipe gallery support, not only to ensure the uniformity of the force of the pipe gallery support, but also to ensure The correctness of the use, if the pipe is thermally displaced, the pipe corridor bracket can be fixed with a retractor before being fixed.
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What are the types of cable trays?
1. The cascade cable tray, CQ1-T cascade cable tray is based on the improvement of the design at home and abroad. It has the advantages of light weight, low cost, unique modeling, easy installation, good heat dissipation and good ventilation. It is suitable for the laying of cables with larger diameter in general, and for the laying of high and low voltage power cables.
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Requirements and methods for using ground wires
1. The grounding wire must have a transparent soft plastic outer sheath. When the temperature changes, the soft plastic outer sheath will not deform or become hard. The bottom of the insulated handle of the ground wire should be sealed. The ground wire manufacturer introduces that when the ground wire chuck and the wire are connected, there should be sufficient tightness and war area, and the ground wire guarantees excellent warfare. The ground wire clamp and ground clamp shall have sufficient strength.
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Galvanized spray-painted bridge and cable duct are not the same
For galvanized spray-painted bridges, many people can't tell the difference between it and some trunkings. Many people and people are the same, but they are not the same. Let's let the editor explain it to you.
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The "five preventions" of high and low voltage switchgear are mainly reflected
1. After the vacuum circuit breaker trolley in the high and low voltage switch cabinet is closed at the test position, the trolley circuit breaker cannot enter the working position. (To prevent closing with load)
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Matters needing attention in laying in fully enclosed bridge
1. Clean and sweep. A good working environment is the key to whether the work can be carried out in an orderly and effective manner, so we must clean up the line pipe in advance, and clean up the dirt and water in the pipe.
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Unusual galvanized sprayed bridge
Unlike some common bridges we use, galvanized sprayed bridges can be said to be produced by reprocessing on their basis. We can greatly increase the corrosion resistance and oxidation resistance of its surface after galvanizing and spraying treatment, so that it can be better used in some harsh environments, that is to increase its scope of use. After we galvanized and spray-painted the bridge, the bridge became a galvanized spray-painted bridge, and its flame retardant and fire resistance capabilities were greatly enhanced. In addition, due to the galvanizing Treatment, so its surface contains a layer of anti-corrosion galvanized layer, so that it can effectively avoid corrosion by the environment when in use, which greatly enhances the service life of galvanized sprayed bridge.
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Three functions of straight-through tray bridge, how many do you know?
Although we all know the use of straight-through tray bridges, most people don't know what role he has, so let's let the editor introduce it to everyone.
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Galvanized metal bridge accessories are also very important
In fact, the use of galvanized metal bridges is not only necessary for the use of the bridge itself, we actually need a lot of accessories when installing.
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What are the environmental requirements for the installation of tray cable trays
We all know the importance of the application of cable trays in the power system and the guarantee of the normal operation of our lives. Due to the different application environments, the types of bridge trays are also different. The tray-type cable trays are petroleum, chemical, light industry, TV, telecommunications The most widely used. It has the advantages of light weight, large load, beautiful shape, simple structure and convenient installation. Today we will take a look at the environmental requirements for the installation of tray cable trays:
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Grid bridge manufacturers tell you what are the common characteristics of high-quality bridges
In the section with fire protection requirements, the cable ladder frame, tray can be added with fire-resistant or flame-retardant plates, nets and other materials to form a closed or semi-closed structure, and the surface of the bridge and its support and hanger are painted Brush fireproof coating and other measures. Its overall fire resistance should meet the requirements of relevant codes or standards. In places with high fire protection requirements. Aluminum alloy cable trays should not be used. Cable lines that need to be shielded from electromagnetic interference. Or when there is protection against external shadows such as outdoor sunshine, oil, corrosive liquid, flammable dust and other environmental requirements. Non-porous tray cable tray should be used.
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Matters needing attention in laying in fully enclosed bridge
Clean and sweep. A good working environment is the key to whether the work can be carried out in an orderly and effective manner, so we must clean up the line pipe in advance, and clean up the dirt and water in the pipe.
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