減小某些物質對橋架的腐蝕的措施
Ji'nan cable bridge installation shield is to play a protective role, reduce the corrosion of some of the material in the air to the bridge, prolong the bridge life.
①如果是在戶外安裝大跨距電纜橋架，就一定要在后一層上也就是頂端的一層，加上一次保護罩。
If a large span cable bridge is installed outdoors, it must be on the last floor, that is, the top layer, plus a protective cover.
?、谠诎惭b大跨距電纜橋架的時候若是加裝有空氣過濾器或者是一些帶孔的裝置時，在上層的電纜橋架應給予充分的保護。
When installing a large span cable tray, if the air filter or some holes are installed, the cable bridge at the top should be fully protected.
③若是將大跨距電纜橋架安裝在一個比較容易受到外界因素影響并損壞的環境中，就需要加上保護罩，以確保其不會受到損傷。
If a large span cable bridge is installed in an environment which is easy to be affected by external factors and damaged, it is necessary to add a protective cover to ensure that it will not be damaged.
?、苋羰菍⑵浒惭b到建筑工地等粉塵過多的地方，也需要對大跨距電纜橋架安裝上保護罩，以免被灰塵侵襲。
Fourth, if it is installed in the construction site and other dust excessive places, also need to install a large span cable bridge shield, so as not to be dust invasion.
除去需要安裝保護罩之外，為了保證大跨距電纜橋架能夠發揮出大的功效，在布線時也是需要注意的。
Apart from the need to install protective cover, in order to ensure the large span cable bridge can play the most effective, in wiring also need to pay attention to.
大跨距山東電纜橋架罩安裝的知識
Knowledge of large span cable bridge cover installation in Shandong
?、偃绻惭b場所為具有腐蝕性或者是非常潮濕的環境，那么在布線時就必須要根據腐蝕介質的不同來采取相應的防護措施。
If the installation site is corrosive or very humid environment, then the wiring must be based on the different corrosive media to take appropriate protective measures.
②若是將幾組電纜橋架同時在同一高度進行平整安裝的時候，就需要考慮各組電纜橋架之間的維護和檢修距離。
Second, if several groups of cable bridge are installed at the same height at the same time, it is necessary to consider the maintenance and repair distance between the cable trays of each group.
?、墼诖罂缇嚯娎|橋架上時可以進行無間距敷設電纜的，電力電纜在橋架內的橫斷面填充率要在40%以下，而控制電纜則應小于橋架橫斷面積的一半。
(3) in the long span cable bridge, the cable can be laid without distance; the cross section filling ratio of the power cable in the bridge should be below 40%, while the control cable should be less than half of the cross sectional area of the bridge.
④安裝大跨距電纜橋架的時候不能安裝在具有腐蝕性氣體管道以及熱力管道的上方，在腐蝕性液體管道的下方也不能直接安裝電纜橋架，若是必須如此的話則應做好防護和隔熱措施。
When the installation of large span cable tray is not installed in the upper part of the corrosive gas pipeline and heating pipelines, under corrosive liquids pipeline cannot be directly installed cable tray, so it must be if it should do the protection and insulation measures.
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