Fixed flange assembly and construction method for fixed flange assembly

Abstract

The invention discloses a fixed flange assembly which is arranged at an end portion of a submarine power cable ascending from the seabed to the land, and particularly relates to a transformation tower or an offshore iron tower, before checking manhole connection with the submarine power cable, the submarine power cable is fixed, sea side pulling and vibration transmitted through the submarine power cable are cut off, ground connection is further carried out, after ground connection and terminal leather peeling of the submarine power cable, a curved face of an exposed armour wire form a fixed flange, the fixed flange bends backwards at the same curvature radius for fixing, the ground contact area can be improved, the folded armour wire is fixed by a clamp, endurance of the connection portion is reinforced to improve ground connection efficiency and shorten the construction time, the upper portion flange and the lower portion flange are respectively cut off in upper and lower directions, and the fixed flange assembly has a left side portion and a right side portion which can be easily separated or bonded. The invention further relates to a construction method for the fixed flange assembly.

Description

technical field [0001] The present invention relates to the relevant content of a fixed flange assembly provided on the end of a submarine power cable for power transmission and distribution that passes through the seabed and rises to the land, and more specifically refers to transformer towers, offshore iron towers, wind power or inspection wells Before connecting the submarine power cable, fix the submarine cable, cut off the vibration that is tilted to the sea side and transmitted through the submarine power cable, and ground at the same time. The fixed flange formed by the ArmourWire curved surface has the same curvature radius and is fixed by bending backwards; the grounding area can be increased, the folded armored wire is fixed by the clamp, and the durability of the connection is strengthened to increase the grounding efficiency and shorten the construction. Time; the upper flange and the lower flange are respectively cut in the vertical direction, and the left and rig...

AI Technical Summary

Problems solved by technology

Due to the addition of a junction box, the overall weight reaches more than 80kg, which makes it very difficult to operate and construct in offshore inspection wells

And because of the large volume of the fixed flange assembly, most of them need to be assembled symmetrically on the left and right sides, which is the reason why the grounding efficiency is lower than that of a single integral type

Therefore, there is a problem that it is impossible to ground from the inside and re-ground the construction, and the countermeasures for bending the submarine power cable to the sea side are limited.

[0010] figure 2 The previous fixed flange assembly was made of rust steel (ST304). Although the anti-rust effect is very good, the conductivity is worse than that of iron.

Also, tension resistance is the degree to which the armored wire is held down with two pliers, thus limiting the ability to properly secure the armored wire

[0011] As mentioned above, in order to increase the contact area between the submarine power cable and the fixed flange assembly, a method of increasing the size of the fixed flange assembly is suggested, but this not only increases the manufacturing cost of the fixed flange assembly, but also increases the weight of the fixed flange assembly. and bulky cause inconvenient movement, has the disadvantage of increasing construction time

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