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1) Damage to external forces. From the operation analysis of recent years, especially in Pudong, Shanghai, where the economy is rapidly developing, a considerable number of cable faults are caused by mechanical damage. For example, when the cable is laid and installed, the construction is not standardized and it is easy to cause mechanical damage. It is also easy to damage the running cable by carrying out the civil construction work on the buried cable. Sometimes if the damage is not serious, it will take several months or even several years to cause complete breakdown of the damaged part to form a fault, and sometimes severe damage may lead to a short-circuit fault, which will directly affect the safe production of electricity-using units.
2) Insulation is damp. This situation is also very common, usually occurs in the cable joints in the direct burial or exhaust pipe. For example, if the cable joints are not qualified and joints are made under humid weather conditions, the joints will be filled with water or mixed with water vapor. For a long time, the water branches will form under the action of the electric field, which will gradually damage the insulation strength of the cables and cause failures.
3) Chemical corrosion. Cables directly buried in areas with acid and alkali effects often cause cable armoring, lead sheathing, or outer sheath erosion. The protective layer is subject to long-term chemical or electrolytic corrosion, which results in failure of the protective layer and reduced insulation. Cable failure. The corrosion of the unit's cable is quite serious 4) Long-term overload operation. Overload operation, due to the thermal effect of the current, the load current will inevitably lead to heating of the conductor when passing through the cable. At the same time, the skin effect of the charge and the eddy current loss and insulation loss of the steel crucible will also generate additional heat, thus increasing the temperature of the cable. During long-term overload operation, an excessively high temperature will accelerate the aging of the insulation so that the insulation is broken down. Especially in the hot summer season, the temperature rise of the cable often leads to the first breakdown of the weak cable insulation. Therefore, in the summer, the cable fault is particularly high.
5) The cable connector is faulty. Cable joints are the weakest link in the cable route. Faults of cable joints caused by direct personnel faults (bad construction) occur frequently. In the process of making cable joints, if the joints of the joints are not tightly connected and the heating is insufficient, the insulation may be reduced, which may cause accidents.
6) Environment and temperature. The external environment and heat source of the cable can also cause the cable temperature to be too high, insulation breakdown, and even explosion.
7) Other reasons such as normal aging of cables or natural disasters.
These points cannot be ignored in the construction of steel structure workshop
The cost of the steel structure factory building is low, and the construction efficiency is high. It only needs to complete the basic design, and the construction can be completed immediately, and the factory building can be put into use quickly. However, when building a factory, we still have to pay special attention to the following points.
simple design
Different from other buildings, the steel structure factory building should still have a simple shape, generally designed as a rectangle, so that it is more convenient to use later and can also ensure the internal space. The layout can be carried out according to the terrain of the site, and attention must be paid to the specific design location of the workshop and whether there is a certain functional area division. Generally, the terrain slope of the factory building should not be greater than 5%, and the hilly slope should not be greater than 40%. Therefore, the construction should be carried out according to the local conditions, and the slope should be reasonable.
Construction location confirmation
As far as possible, the factory building should avoid locations such as earthquake faults, especially some locations prone to mudslides and landslides are not suitable for building factory buildings. If it is a valuable mining area, ancient tomb, etc., try not to build factories, etc. Before the construction of the factory building, it is necessary to do a good on-site inspection. If the local area is not suitable for the construction of the factory building, try to choose another place, so as to avoid the need to relocate the factory building later, which will be more troublesome and waste time and construction costs.
Reserved land for expansion
Steel structure workshops are very easy to expand, because with the increase in later construction requirements, many workshops may need to be expanded. Therefore, at the beginning of construction, a place for expansion should be reserved. At least the process requirements, transportation requirements, and whether there are other plant constructions should be considered.
Pay attention to construction inspection Steel Structure Workshop and Steel Structure Warehouse are relatively easy to construct and construct, so it is still necessary to pay attention to the need for safety personnel to inspect the site, and report in time if there are some installation problems. Moreover, after the construction is completed, there must be a construction inspection, and the stability of the plant must be ensured, so as not to affect the later use of the plant.
It is only necessary to select the appropriate materials for the construction of the steel structure factory building, and choose a suitable construction location, then basically the construction of the factory building can be completed immediately, and the factory building can also be quickly put into later use.
Steel Structure Workshop,Steel Frame Workshop,Workshop Steel Structure,Steel Structure Warehouse Workshop
Henan Jinming Metal Material Co., Ltd. , https://www.hnjmsteel.com