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 triple-shielded flame-retardant single-core nuclear power cable, which consists of an outer insulating sheath, a first shielding layer, an inner insulating sheath, a second shielding layer, a bus insulation mesh tape, a sub-wire and a sub-wire filling bead, and the sub-wire It consists of sub-wire shielding layer, sub-wire insulating mesh belt, sub-wire sheath, heat insulation film and conductor core, and heat insulation film, sub-wire sheath, sub-wire insulation mesh belt and sub-wire shielding layer are arranged in sequence outside the conductor core. Since the three wire cores are respectively wrapped by sub-wire sheath, sub-wire insulating mesh tape and sub-wire shielding layer, the three sub-wires are filled with sub-wire filling bead and firmly glued to form a cable. Each wire core has three metal shields. The external electric field and magnetic field will not interfere with the power cable during the transmission process, and the electromagnetic field generated by the power cable is also shielded, so it will not interfere with the electrical and control systems of the adjacent distribution lines. The shaft voltage generated during operation protects the practical safety of electrical appliances.

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. A triple-shielded flame-retardant single-core nuclear power cable is characterized in that it consists of an outer insulating sheath (1), a first shielding layer (2), an inner insulating sheath (3), a second shielding layer ( 4), bus insulation mesh belt (5), sub-wire (6) and sub-wire filling layer (7), the sub-wire (6) is composed of sub-wire shielding layer (61), sub-wire insulation mesh belt (62), sub-wire Wire sheath (63), thermal insulation film (64) and wire core (65), and heat insulation film (64), sub-wire sheath (63), sub-wire insulation net are arranged in sequence outside the wire core (65) The belt (62) and the sub-wire shielding layer (61), the outer circles of the sub-wire shielding layers (61) of the three sub-wires are in contact with each other, the centers of the three sub-wires (6) are arranged in an equilateral triangle, and the three sub-wire filling bead (7) are arranged on the three sub-wires (6) At the space formed by the contact, the three sub-wires (6) and the three sub-wires fill the bead (7) to form a circular section, and are blocked by the bus insulation mesh belt (5), outside the bus insulation mesh belt (5) A second shielding layer (4), an inner insulating sheath (3), a first shielding layer (2) and an outer insulating sheath (1) are provided in sequence, and the conductor core (65) is a single-core copper core with a regular polygonal cross section. The cross-sectional shape of the core wire and the sub-wire sheath (63) is: the profile is circular, and the inner hole corresponds to the cross-sectional shape of the wire core.

2. The triple-shielding flame-retardant single-core nuclear power cable according to claim 1, characterized in that: the cross-sectional shape of the conductor core (65) is a square.

3. The triple-shielded flame-retardant single-core nuclear power cable according to claim 1, characterized in that: when the cross-sectional area of the conductor core (65) is greater than 35 square millimeters, the sub-wire shielding layer (61) is made of copper A tubular body rolled from sheet material; when the cross-sectional area of the conductor core (65) is less than 35 square millimeters, the sub-wire shielding layer (61) is a tubular body braided by copper wires.

4. The triple-shielding flame-retardant single-core nuclear power cable according to claim 1, characterized in that: the first shielding layer (2) and the second shielding layer (4) are both tubular bodies rolled from color steel plates.

5. The triple-shielded flame-retardant single-core nuclear power cable according to claim 1, characterized in that: the cross-sectional shape of the sub-wire filling bead (7) consists of an outer arc (71) and two inner arcs ( 72), the outer arc (71) has the same inner diameter as the second shielding layer (4), the diameter of the two inner arcs (72) is the same as the outer diameter of the sub-wire shielding layer (61), and the two inner arcs (72) have the same diameter as the sub-wire shielding layer (61). The circular arc (72) is circumscribed and simultaneously inscribed with the outer circular arc (71).