CN201904154U

CN201904154U - Triplex-shielding flame-retardant single-core power cable for nuclear power

Info

Publication number: CN201904154U
Application number: CN2010206969815U
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

A triplex-shielding flame-retardant single-core power cable for nuclear power comprises an outer insulating sleeve, a first shielding layer, an inner insulating sleeve, a second shielding layer, a bus insulating mesh belt, sub wires, and sub wire filling-up and holding-down strips, wherein each sub wire comprises a sub-wire shielding layer, a sub wire insulating mesh belt, a sub wire sheath, heat insulation film and a conducting wire core; and the heat insulation film, the sub wire sheath, the sub wire insulating mesh belt and the sub-wire shielding layer are wrapped outside each conducting wire core sequentially. Since each of the three conducting wire cores is wrapped by the sub wire sheath, the sub wire insulating mesh belt and the sub-wire shielding layer, the three sub wires are filled with and pressed by the sub wire filling-up and holding-down strips and are firmly glued into the cable, and each conducting wire core receives triplex metal shielding, the power cable is not disturbed by external electric field and magnetic field during power transmission, the electromagnetic field generated by the power cable is also shielded, and no disturbance is caused to the electric and control system of neighbor distribution lines. In addition, owing to the special layout structure, shaft voltage generated during the operation of electric appliance in a variable frequency loop is lowered, and the practical safety of the electric devices is safeguarded.

Description

The only core electricity of a kind of triple shielding flame retardant type power cable

Technical field:

The utility model relates to a kind of power cable, relates in particular to the power cable of used in nuclear power station.

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 utility model content:

The purpose of this utility model provides the only core electricity of a kind of triple shielding flame retardant type 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.

The technical scheme that the utility model is taked is:

The only core electricity of described a kind of triple shielding flame retardant types power cable, it is characterized in that: 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, described sub-line is by sub-line screen, sub-line insulation guipure, sub-line sheath, thermal isolation film and wire stylet are formed, outside wire stylet, be provided with thermal isolation film successively, sub-line sheath, sub-line insulation guipure and sub-line screen, 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, described wire stylet is only core copper core of cross section regular polygon, the cross sectional shape of sub-line sheath is: profile is for circular, and endoporus is corresponding with the wire stylet cross sectional shape.

Further, the cross sectional shape of described wire stylet is a square.

Further, when the area of section of wire stylet during greater than 35 square millimeters, described sub-line screen is the tubular body that copper sheet material rolls; When the area of section of wire stylet during less than 35 square millimeters, described sub-line screen is the tubular body that copper wire is woven into.

Further, first screen and secondary shielding layer are color steel and roll the tubular body that forms.

Further, the cross sectional shape that described sub-line is filled press strip is combined by an external arc and two interior circular arcs, and external arc is identical with the internal diameter of secondary shielding layer, and 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.

In the utility model, described outer layer insulation cover, primary insulation cover and sub-line sheath are flame retardant rubber, and it is flame-proof filling material that sub-line is filled press strip, and insulated bus guipure and sub-line insulation guipure are fiberglass braided isometrical guipure.

In the utility model, because three wire stylets are respectively by sub-line sheath, sub-line insulation guipure and sub-line screen wrap up, three root lines are tamped after insulated bus guipure parcel by three root lines filling press strip, again through the secondary shielding layer, the primary insulation cover, the parcel of first screen and outer layer insulation cover is compound, not only make three root lines compose cable securely, and per share wire stylet is all through three road metallic shields, therefore, power cable can not disturbed in electric field and magnetic field extraneous in the electric power course of conveying, the power cable also conductively-closed that generates an electromagnetic field, can not spread, can electric and control system generation interference to contiguous distribution line.As the electric energy transmitting cable of nuclear power, it can not only eliminate high order harmonic component interference to external world preferably, and its specific arrangement structure, has reduced the shaft voltage that electrical appliance is in operation and produces in the frequency conversion loop, has protected the safety of electrical appliance practicality.

Description of drawings:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the structural representation that the sub-line in the utility model is filled press strip;

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-thermal isolation film; The 65-wire stylet; 7-line is filled press strip; The 71-external arc; Circular arc in the 72-.

Embodiment:

The only core electricity of described a kind of triple shielding flame retardant types power cable, as Fig. 1, shown in Figure 2, 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, described sub-line 6 is by sub-line screen 61, sub-line insulation guipure 62, sub-line sheath 63, thermal isolation film 64 and wire stylet 65 are formed, outside wire stylet 65, be provided with thermal isolation film 64 successively, sub-line sheath 63, 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 65 is only core copper core of square sectional, the cross sectional shape of sub-line sheath 63 is round outside but spuare inside, be that profile is circular, the heart yearn hole is a square, the sectional area of wire stylet 65 is 22 square millimeters, the tubular body that sub-line screen 61 rolls for copper sheet material, the sectional area of sub-line screen 61 are wire stylet 65 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 only core electricity of triple shielding flame retardant types power cable, it is characterized in that: 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), thermal isolation film (64) and wire stylet (65) are formed, outside wire stylet (65), be provided with thermal isolation film (64) successively, sub-line sheath (63), sub-line insulation guipure (62) and sub-line screen (61), the cylindrical of the sub-line screen (61) of three root lines is in contact with one another, the center of three root lines (6) is the equilateral triangle setting, three root lines are filled press strip (7) and are arranged on place, the formed space of three root lines (6) contact, 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) net, 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 (65) is only core copper core of cross section regular polygon, the cross sectional shape of sub-line sheath (63) is: profile is for circular, and endoporus is corresponding with the wire stylet cross sectional shape.

2. according to the only core electricity of the described triple shielding flame retardant types of claim 1 power cable, it is characterized in that: the cross sectional shape of described wire stylet (65) is square.

3. according to the only core of the described triple shielding flame retardant types of claim 1 electricity power cable, it is characterized in that: when the area of section of wire stylet (65) during greater than 35 square millimeters, the tubular body that described sub-line screen (61) rolls for copper sheet material; When the area of section of wire stylet (65) during less than 35 square millimeters, the tubular body that described sub-line screen (61) is woven into for copper wire.

4. according to the only core electricity of the described triple shielding flame retardant types of claim 1 power cable, it is characterized in that: first screen (2) and secondary shielding layer (4) are color steel and roll the tubular body that forms.

5. according to the only core electricity of the described triple shielding flame retardant types of claim 1 power cable, it is characterized in that: the cross sectional shape that described sub-line is filled press strip (7) 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 while and external arc (71) inscribe.