In recent years, China has invested large sums of money to implement the transformation of urban and rural power grids. However, the number of years of distribution line construction in the old urban areas is relatively early. The construction standards are relatively low compared with the modern needs. The facilities are aging seriously, and the number of wires, such as spider webs, are also hung in the air. In addition, it has not only hindered the city's foresight, but also buried a number of security risks. In recent years, China has invested large sums of money to implement urban and rural power grid reconstruction, but the number of years of distribution line construction in the old city is relatively early, and the construction standards are relatively low compared with modern needs. The aging is serious, and the number of wires, such as spider webs, are also hanging in the air. It not only hinders the city's observation, but also buryes some hidden dangers, which seriously endangers the personal life safety of the public. Under such a background, from the perspective of improving the reliability of urban residents' power grid reliability and line evangelism, and the progress of the roots, the pollution of the city, and the progress of the greening of the city background, the Ministry of National Affairs proposed the “cable to the groundâ€. In general, cable tunnels and cable trenches have also become the main channels for urban power supply. With the standardization and standardization of various aspects of power grid equipment, and suitable for the development direction of cable-down projects, the development and selection of high-quality embedded cable brackets has become a key issue for us.
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Because the various pipelines in the archway are parallel and intertwined, the space is limited, especially for the construction of large office buildings, financial commercial buildings, hotels, venues, etc., and the information points are densely covered. The prefabricated cable supports of FRP are laid and used in addition to the slab trenches and wall buried pipes. In addition to the form, it is widely considered to be suitable in the vertical ceiling of the shaft and the roof, and the fiberglass pre-embedded cable bracket is used to supply the wiring of different directions. The various cables of the weak current system are arranged in the bridge, and the best route selection and installation are carried out. The form should be confirmed according to the requirements of the strike, and the location of the construction structure and the air-conditioning, electrical and other pipelines are negotiated. The passive cable can not be installed side by side with the active cable, and it should be placed in the same bridge frame under the condition. Suitably, the metal partitions are separately arranged, and the drawn cables try to prevent the simplest surface interlacing. When the bridge passes through the floor, wall or expansion joint, it should be marked on the construction drawing to leave the corresponding air gap and position to prevent Leaking and waiting until the start of construction temporarily drilled, may damage the civil structure. In order to avoid electromagnetic interference (EMC), in the presupposition of the bridge, the closedness of the problem glass fiber reinforced embedded cable support should be considered.
The level and internal meaning of the building body are confirmed according to the functional requirements of the building body. These systems cover different types of cables and wires, and some of them belong to the active cable (the power supply voltage is usually DC12/24/48V and AC220V). A little bit is a passive electric (optical) cable (according to the original number of cables, video files, coaxial cable, etc.), because this, in the wiring form and routing selection of the implementation of the preset, should be different, not only should be met The requirements of the specification must also consider the safety, expandability, economy and aesthetics of the problem wiring, and easy maintenance. The FRP pre-embedded cable bracket is used as a carrier for carrying various FRP embedded cable supports, and is attached to the wiring. The same needs should be followed in accordance with the principles mentioned above.
The cables in power plants and substations, except for a small amount buried directly in the ground, are mostly laid on pre-embedded cable supports. The effectiveness of using pre-embedded cable supports is considered to be as follows:
1. Arrange the cables and make them easy to repair.
2, the cable is erected in layers, maintaining a certain distance, which is conducive to heat dissipation.
3. Various cables can be laid separately to prevent mutual influence. For example, the cable is laid separately from the power cable, and the high-voltage cable is laid separately from the low-voltage cable.
4. Use the pre-embedded cable bracket to lift the cable to avoid flooding and mechanical damage. This article URL: http://
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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