CN201904115U - Triplex-shielding flame-retardant type nuclear power data cable - Google Patents

Abstract

A triplex-shielding flame-retardant type nuclear power data cable 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. Data core wire bundles, after being coated by heat insulation film, receive triplex metal shielding by a sub-wire shielding layer, the second shielding layer, and the first shielding layer. Since the data core wire bundles are coated by the heat insulation film and then are coated by a sub wire sheath, a 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, then coated by the bus insulating mesh belt, and coated by and combined with the second shielding layer, the inner insulating sleeve, the first shielding layer, and the outer insulating sleeve, and each data core wire bundle receives triplex metal shielding and is coated by the heat insulation film, the data cable can not be disturbed by external electric field and magnetic field, the electromagnetic field generated by the data cable is also shielded, the fire-resistant performance is improved, and both the stability and the safety of the nuclear power data control system are safeguarded.

Description

A kind of triple shielding flame retardant type nuclear power data cable

Technical field:

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

Background technology:

Along with the fast development of nuclear power industry, increasing to the demand of the used data cable of nuclear power station, require also more and more highlyer, at present, the data cable that is used for nuclear power station has been proposed to possess the no electromagnetic interference requirement of " electromagnetic compatibility ".And existing plain edition data cable can not meet the demands; communication system especially for nuclear power control; nuclear power output number sub-control system; remote operating system; the electric power dispensing control system all be can't do without data cable; not only number of data lines is many; and require the performance of anti-electromagnetic interference to get well; especially anti-high order harmonic component interference capability; the control shakiness appears in regular meeting when adopting common data cable; malfunctioning or be interrupted defectives such as out of control; it will directly influence the operate as normal and the electric power control meeting system of whole nuclear power station, bring potential safety hazard can for the normal operation of whole system.Therefore in " nuclear safety guide rule ", emphasize " physical segregation of signal cable and power cable " in HAD102/14 " relevant instrument of npp safety and control system " the 4.8 electrical Interference chapters and sections, data-signal cable and power cable will separate, and all must possess anti-electromagnetic interference capability, can not outwards produce new electromagnetic interference simultaneously.Existing plain edition data cable and power cable all have can not satisfy above-mentioned requirements.

The utility model content:

The purpose of this utility model provides a kind of triple shielding flame retardant type nuclear power data cable, and it can have anti-electromagnetic interference performance, satisfies electromagnetic compatibility (EMC) requirement, has fire protecting performance again.

The technical scheme that the utility model is taked is:

The fire-retardant nuclear power data cable of described a kind of triple shieldings, 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 data heart yearn Shu Zucheng, outside data heart yearn bundle, 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.

Further, the cross section of described data heart yearn bundle is circular.

Further, 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 the diameter of 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.Because the data heart yearn bundle of three root lines is respectively by thermal isolation film, 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 data heart yearn bundle is all through three road metallic shields, therefore, can the interfering data cable in the electric field in the external world and magnetic field, the data cable also conductively-closed that generates an electromagnetic field, can not spread, data cable as nuclear power, it can not only eliminate high order harmonic component interference to external world preferably, and has improved the fire protecting performance of data cable.This special construction has reduced external electromagnetic field significantly data line has been disturbed and fire protecting performance, has protected the stability and the fail safe of nuclear power data control system.

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; 65-data heart yearn bundle; 7-line is filled press strip; The 71-external arc; Circular arc in the 72-.

Embodiment:

A kind of triple shielding flame retardant type nuclear power data 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 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 data heart yearn bundle 65 are formed, outside data heart yearn bundle 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, 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 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; The cross section of described data heart yearn bundle 65 is circular, and it is that 0.4 millimeter color steel rolls the tubular body that forms that the tubular body that sub-line screen 61 is woven into for copper wire, 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 the diameter of 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 (5)

1. triple shielding flame retardant type nuclear power data 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 (1) is by sub-line screen (61), sub-line insulation guipure (62), sub-line sheath (63), thermal isolation film (64) and data heart yearn bundle (65) are formed, outside data heart yearn bundle (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 (6) is in contact with one another, the center of three root lines (6) is the equilateral triangle setting, three root lines filling press strips (7) are arranged on three root lines and contact place, formed space, 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).

2. according to the described triple shielding flame retardant type nuclear power data cables of claim 1, it is characterized in that: the cross section of described data heart yearn bundle (65) is for circular.

3. according to the described triple shielding flame retardant type nuclear power data cables of claim 1, it is characterized in that: the tubular body that described sub-line screen (61) is woven into for copper wire.

4. according to the described triple shielding flame retardant type nuclear power data cables of claim 1, 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 described triple shielding flame retardant type nuclear power data cables of claim 1, 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) diameter 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.

Images