CN201904152U

CN201904152U - Sub wire filling-up and holding-down strip for nuclear power cable

Info

Publication number: CN201904152U
Application number: CN2010206969586U
Authority: CN
Inventors: 吴长全; 吴品
Original assignee: JINTAN JINLU CABLE MATERIAL CO Ltd
Current assignee: JINTAN JINLU CABLE MATERIAL CO Ltd
Priority date: 2010-12-29
Filing date: 2010-12-29
Publication date: 2011-07-20
Anticipated expiration: 2020-12-29

Abstract

The utility model relates to a sub wire filling-up and holding-down strip for a nuclear power cable. The shape of the cross section of the sub wire filling-up and holding-down strip is combined by an external arc and two inner arcs, wherein the diameter of the external arc is the same with the inner diameter of a second shielding layer; the diameter of the two inner arcs is the same with the external diameter of a sub-wire shielding layer; and the two inner arcs are externally tangent and are internally tangent with the external arc. The shape of the cross section fits that of three distributed sub wires; the cross section is used for wrapping the three sub wires to enable three sub wire filling-up and holding-down strips and the three sub wires to combine to form a round section and the three sub wires to be in regular layout. Therefore, the staggered intertwisting among the sub wires is prevented, the sub wire group and the sub wire filling-up and holding-down strips of the entire power cable are combined to form a regular round section, and the sleeving of the second shielding layer and the compound of an inner insulating sleeve, as well as the sleeving of a first shielding layer and the compound of an outer insulating sleeve, are facilitated.

Description

A kind of sub-line of nuclear power power cable tamps bar

Technical field:

The utility model relates to a kind of nuclear power special electric power cable, and the sub-line that relates in particular in the nuclear power special electric power cable tamps bar.

Background technology:

Along with the fast development of nuclear power industry, increasing to the demand of nuclear power output cable, require also more and more highlyer, at present, the no electromagnetic interference requirement of " electromagnetic compatibility " the nuclear power power cable is proposed both at home and abroad.Have now and can not meet the demands as the used plain edition power cable of transferring electric power, power cable especially for the frequency conversion loop, the in use inevitable high order harmonic component that exists is disturbed, when electric current passes through power cable, can disturb electric the generation with control system of contiguous distribution line, the serious normal operation of whole system of also can giving brings hidden danger.Fail safe is vital in the nuclear power construction, emphasize " physical segregation of signal cable and power cable " in HAD102/14 in " nuclear safety guide rule " " relevant instrument of npp safety and control system " the 4.8 electrical Interference chapters and sections, and the plain edition power cable can not satisfy above-mentioned requirements, can not solve the electromagnetic shielding problem in the power cable transmission of electricity process.The applicant has developed a kind of triple shielding nuclear power power cable, and it can satisfy " electromagnetic compatibility (EMC) " and nuclear power " function isolation " requirement, can meet environmental protection (EM) requirement again, cable profile rounding.

Described triple shielding nuclear power power cable, it is by the outer layer insulation cover, first screen, the primary insulation cover, the secondary shielding layer, the insulated bus guipure, sub-line and sub-line are filled press strip and are formed, the cylindrical of the sub-line screen of three root lines is in contact with one another, the center of three root lines is the equilateral triangle setting, three root lines filling press strip is arranged on three root lines and contacts place, formed space, make three root lines and three root lines fill press strip and form circular cross-section, and block by insulated bus guipure net, outside the insulated bus guipure, be provided with the secondary shielding layer successively, the primary insulation cover, first screen and outer layer insulation cover.Wherein, the effect that sub-line tamps bar is that three root lines are regularly arranged good mutually, prevent interlaced winding between sub-line, make the sub-line group and the sub-line of whole power cable tamp bar combination acquisition regular circular cross section, suit and the primary insulation cover of being convenient to the secondary shielding layer are compound, and it is compound that the suit of first screen and outer layer insulation overlap.

The utility model content:

The sub-line that the purpose of this utility model provides a kind of nuclear power power cable tamps bar.

The technical scheme that the utility model is taked is:

The sub-line of described a kind of nuclear power power cable tamps bar, it is characterized in that: its cross sectional shape is combined by an external arc and two interior circular arcs, the diameter of external arc is identical with the internal diameter of secondary shielding layer, the diameter of two interior circular arcs is identical with the external diameter of sub-line screen, two interior circular arcs are circumscribed, and with the external arc inscribe, the compartment of terrain is provided with circular groove on the cambered surface of external arc, between two adjacent grooves, form the circular arc convex body, in two on the cambered surface of circular arc at interval be provided with occlusal crib, between two adjacent occlusal cribs, form the circular arc convex body.

Further, the space that circular arc surrounds in external arc and two is provided with the distortion hole.

Because it is identical with the internal diameter of secondary shielding layer that the sub-line of triple shielding nuclear power power cables tamps the external arc of bar, the diameter of two interior circular arcs is identical with the external diameter of sub-line screen, two interior circular arcs are circumscribed, and with the external arc inscribe, the distribution cross section of cross sectional shape and three sub-lines coincide like this, come inclusion three root line inclusions unified with it, three root lines tamp bar and become a circular cross-section with three root line inclusions, through applicant's actual verification, it is very good to tamp effect with it as the sub-line of triple shielding nuclear power power cables, it can be regularly arranged good mutually with three root lines, prevent interlaced winding between sub-line, make the sub-line group and the sub-line of whole power cable tamp bar combination acquisition regular circular cross section, suit and the primary insulation cover of being convenient to the secondary shielding layer are compound, and it is compound that the suit of first screen and outer layer insulation overlap.

Description of drawings:

Fig. 1 is two kinds of structural representations of the present utility model;

Fig. 2 is the structural representation that the utility model is used at triple shielding nuclear power power cables;

Among the figure: 1-outer layer insulation cover; 2-first screen; 3-primary insulation cover; 4-secondary shielding layer; 5-insulated bus guipure; 6-line; 61-line screen; 62-line insulation guipure; 63-line sheath; The 64-wire stylet; 7-line is filled press strip; The 71-external arc; Circular arc in the 72-; The 73-convex body; The 74-groove; The 75-occlusal crib; 76-is out of shape the hole.

Embodiment:

Below in conjunction with description of drawings embodiment of the present utility model:

Embodiment 1: the sub-line of described a kind of nuclear power power cable tamps bar, as shown in Figure 1, its cross sectional shape is combined by an external arc 71 and two interior circular arcs 72, external arc 71 is identical with the internal diameter of secondary shielding layer 4, the diameter of two interior circular arcs 72 is identical with the external diameter of sub-line screen 61, two interior circular arcs 72 are circumscribed, and with external arc 71 inscribes, the compartment of terrain is provided with circular groove 74 on the cambered surface of external arc 71, between two adjacent grooves 74, form circular arc convex body 73, in two on the cambered surface of circular arc 72 at interval be provided with occlusal crib 75, form circular arc convex body 73 between two adjacent occlusal cribs 75, the space that circular arc 72 surrounds in external arc 71 and two is provided with distortion hole 76.

Fig. 2 is the structural representation that the utility model is used at triple shielding nuclear power power cables, the nuclear power special electric power cable of described triple shieldings, it is by outer layer insulation cover 1, first screen 2, primary insulation cover 3, secondary shielding layer 4, insulated bus guipure 5, sub-line 6 and sub-line are filled press strip 7 and are formed, described sub-line 6 is by sub-line screen 61, sub-line insulation guipure 62, sub-line sheath 63 and wire stylet 64 are formed, outside wire stylet 64, be provided with sub-line sheath 63 successively, sub-line insulation guipure 62 and sub-line screen 61, the cylindrical of three root lines 6 is in contact with one another, their center is the equilateral triangle setting, three root lines are filled press strip 7 and are arranged on the formed space of three root lines, 6 contacts, make three root lines 6 and three root lines fill press strip 7 and form circular cross-section, and block by insulated bus guipure 5 nets, outside insulated bus guipure 5, be provided with secondary shielding layer 4 successively, primary insulation cover 3, first screen 2 and outer layer insulation cover 1; Described wire stylet 64 is circular copper cash bundle, and the sectional area of wire stylet 64 is 22 square millimeters, and the tubular body that sub-line screen 61 rolls for copper sheet material, the sectional area of sub-line screen 61 are wire stylet 64 sectional areas 12%; It is that 0.4 millimeter color steel rolls the tubular body that forms that first screen 2 and secondary shielding layer 4 are thickness; It is flame-proof filling material that described sub-line is filled press strip 7, and its cross sectional shape is combined by an external arc 71 and two interior circular arcs 72, and external arc 71 is identical with the internal diameter of secondary shielding layer 4, and the diameter of two interior circular arcs 72 is identical with the external diameter of sub-line screen 61; Two interior circular arc 72 circumscribed backs all with external arc 71 inscribes, described outer layer insulation cover 1, primary insulation overlap 3 and sub-line sheath 63 be fire retardant insulating rubber, insulated bus guipure 5 and the sub-line guipure 62 that insulate is fiberglass braided isometrical guipure.

Claims

1. the sub-line of a nuclear power power cable tamps bar, it is characterized in that: its cross sectional shape is combined by an external arc (71) and two interior circular arcs (72), the diameter of external arc (71) is identical with the internal diameter of secondary shielding layer (4), the diameter of two interior circular arcs (72) is identical with the external diameter of sub-line screen (61), two interior circular arcs (72) are circumscribed, and with external arc (71) inscribe, the compartment of terrain is provided with circular groove (74) on the cambered surface of external arc (71), between two adjacent grooves (74), form circular arc convex body (73), on the cambered surface of circular arc in two (72) at interval be provided with occlusal crib (75), between two adjacent occlusal cribs (75), form circular arc convex body (73).

2. the sub-line according to the described nuclear power power cable of claim 1 tamps bar, it is characterized in that: the space that circular arc (72) surrounds in external arc (71) and two is provided with distortion hole (76).