Filling-pressing strip for nuclear power cable sub-line
A technology for power cables and sub-wires, which is applied in the field of special power cables for nuclear power, can solve the problems of electromagnetic shielding, interference, and hidden dangers of normal operation of the system that cannot be solved.
Inactive Publication Date: 2011-05-25
JINTAN JINLU CABLE MATERIAL
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Problems solved by technology
The existing ordinary power cables used for power transmission can no longer meet the requirements, especially the power cables used for frequency conversion circuits, the high-order harmonic interference that inevitably exists during use, when the current passes through the power cables, it will affect the adjacent The electrical and control system of the distribution line will cause interference, and in severe cases, it will bring hidden dangers to the normal operation of the entire system
Safety is very important in nuclear power construction. In the "Nuclear Safety Guidelines", HAD102 / 14 "Nuclear Power Plant Safety-Related Instrumentation and Control Systems" in Chapter 4.8 Electrical Interference emphasizes "the physical separation of signal cables and power cables", Ordinary power cables cannot meet the above requirements, and cannot solve the problem of electromagnetic shielding in the process of power cable transmission.
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Embodiment 1
[0013] Embodiment 1: the sub-wire filling strip of the nuclear power cable, such as figure 1 As shown, its cross-sectional shape is composed of an outer arc 71 and two inner arcs 72. The outer arc 71 is the same as the inner diameter of the second shielding layer 4, and the diameter of the two inner arcs 72 is the same as that of the sub-wire shielding layer. The outer diameter of 61 is identical, and two inner arcs 72 circumscribe, and inscribe with outer arc 71, be provided with arc-shaped groove 74 at intervals on the arc surface of outer arc 71, in two adjacent grooves 74 Form arc convex body 73 between, be provided with engagement groove 75 at intervals on the arc surface of two inner arcs 72, form arc convex body 73 between two adjacent engagement grooves 75, between outer arc 71 and The space enclosed by the two inner arcs 72 is provided with a deformation hole 76 .
[0014] figure 2 It is a structural schematic diagram of the application of the present invention in ...
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Abstract
The invention relates to a filling-pressing strip for a nuclear power cable sub-line, wherein the cross section shape of the filling-pressing strip is composed of one outer arc and two inner arcs; the diameter of the outer arc is the same as the inner diameter of a second shielding layer, the diameters of the two inner arcs are the same as the outer diameter of a sub-line shielding layer; and the two inner arcs are externally tangent with each other, and internally tangent with the outer arc, therefore, the cross section shape of the filling-pressing strip is matched with the distribution cross sections of the three sub-lines. When the filling-pressing strip is used for wrapping and combining the three sub-lines, the filling-pressing strip of the three sub-lines can be combined with the three sub-lines into a circular cross section. The three sub-lines can be regularly arranged by the filling-pressing strip, so as to prevent the sub-lines from being interleaved and wound with each other, therefore, a regular circular cross section is obtained by combining sub-line groups of the whole power cable and the filling-pressing strip of the sub-lines, thus facilitating the combination of a second shielding layer sleeve with an inner insulation sleeve and the combination of a first shielding layer suite with an outer insulation sleeve.
Description
Technical field: [0001] The invention relates to a nuclear power special power cable, in particular to a sub-wire filling strip in the nuclear power special power cable. Background technique: [0002] With the rapid development of the nuclear power industry, the demand for nuclear power output cables is increasing, and the requirements are getting higher and higher. At present, nuclear power cables at home and abroad have proposed "electromagnetic compatibility" without electromagnetic interference requirements. The existing ordinary power cables used for power transmission can no longer meet the requirements, especially the power cables used for frequency conversion circuits, the high-order harmonic interference that inevitably exists during use, when the current passes through the power cables, it will affect the adjacent The electrical and control system of the power distribution line will interfere, and in severe cases, it will bring hidden dangers to the normal operatio...
Claims
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IPC IPC(8): H01B9/02
Inventor 吴长全吴品
Owner JINTAN JINLU CABLE MATERIAL