CN201149782Y

CN201149782Y - Fire resistant cable for nuclear power plant

Info

Publication number: CN201149782Y
Application number: CNU2008200047775U
Authority: CN
Inventors: 余纪炎; 徐华胜
Original assignee: Individual
Current assignee: KAIKAI CABLE TECHNOLOGY Co Ltd
Priority date: 2008-01-29
Filing date: 2008-01-29
Publication date: 2008-11-12
Anticipated expiration: 2018-01-29

Abstract

The utility model relates to the cable technical field, in particular to a high temperature resistant cable used for nuclear power plants; the utility model is characterized in that a teflon-coated insulation layer is arranged at the periphery of a conductor to form an insulation wire core; more than two insulation wire cores are intertwisted to form a cable core; a flame-retardant polyester belt layer, a copper wire braided shielding layer, a high-flame retardant low-smoke and halogen-free oxygen isolation layer and an anti-tearing silicone rubber sheath are sequentially arranged from the interior to the exterior on the external surface of the cable core; a filling layer composed of fiber-glass ropes is filled in the gap between the flame-retardant polyester belt layer and the cable core. The high temperature resistant cable has the advantages that the cable has superior high-temperature-resistant, low-smoke, halogen-free, flame-retardant, oil-resistant, radiation-resistant and coolant-loss-accident-resistant properties and excellent shielding performance; the product has reliable work, low cost and large carrying capacity, and can be used as IE-grade K1-class nuclear island cables in nuclear power plants to significantly reduce the construction cost of the nuclear power plants.

Description

High temperature resistance cable for nuclear power station

Technical field:

The utility model relates to the cable technology field, refers in particular to a kind of high temperature resistance cable for nuclear power station.

Background technology:

Because the special environment for use of nuclear power station, require very high to operational outfit, the used in nuclear power station nuclear island cable, be in the general electric property of common cable, on the basis of mechanical performance, also must possess low cigarette, Halogen, fire-retardant, radiation hardness, the damage accident of anti-cooling agent the (LOCA) performance and good shielding properties, in each big nuclear power station of having gone into operation at present and having built, only the outer used in nuclear power station IE level K3 class cable of containment just progressively domesticizes, and used in nuclear power station IE level K1 class nuclear island cable does not still have correlation technique in China, required product is dependence on import basically, and the imported product Buying Cycle is very long, the working service difficulty, equipment cost costliness, and the tear resistance of existing product, performance such as insulating properties and heat-resisting quantity is good inadequately.

Summary of the invention:

The purpose of this utility model provides a kind of high reliability used in nuclear power station nuclear island cable, and this nuclear island cable should possess the used in nuclear power station IE level K1 class nuclear island cable of excellent high temperature resistant, low cigarette, Halogen, fire-retardant, radiation hardness, the damage accident of anti-cooling agent the (LOCA) and good shielding properties.

The utility model is achieved in that high temperature resistance cable for nuclear power station, it is characterized in that being equipped with polytetrafluoroethylene coated insulation layer formation insulated wire cores in the outer periphery of conductor, be twisted into cable core by the insulated wire cores more than two, outer surface at cable core is disposed with flame retardant polyester belt, copper wire woven shield, high flame resistance, low smoke Halogen oxygen barrier layer and tear-proof silicon rubber oversheath from inside to outside, is filled with the packed layer that constitutes with glass cord in the gap between flame retardant polyester belt and polytetrafluoroethylene coated insulation layer 11.

The outstanding compared to existing technology advantage of the utility model is:

1, the utility model possesses excellent high temperature resistant, low cigarette, Halogen, fire-retardant, oil resistance, anti-electromagnetic field radiation, anti-x radiation x, damage accident of anti-cooling agent the (LOCA) and good shielding properties, properties of product are reliable, cost is low, can be used as used in nuclear power station IE level K1 class nuclear island cable and be extensive use of, can reduce the construction cost of nuclear power station significantly.

2, the utility model adopts polytetrafluoroethylene to do the insulation material, makes the use working temperature of cable bring up to 250 present degree by the highest original 90 degree, and mechanical performance also improves greatly, and therefore the ampacity of cable increases, and prolong the useful life of product.

Description of drawings:

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

Among the figure: the 10-conductor;

11-polytetrafluoroethylene coated insulation layer;

12-flame retardant polyester belt;

13-copper wire woven shield;

14-high flame resistance, low smoke Halogen oxygen barrier layer;

15-tear-proof silicon rubber oversheath;

The packed layer that 16-constitutes with glass cord.

Embodiment:

With specific embodiment the utility model is further described below:

Referring to Fig. 1: high temperature resistance cable for nuclear power station, it is characterized in that being equipped with polytetrafluoroethylene coated insulation layer 11 formation insulated wire cores in the outer periphery of conductor 10, be twisted into cable core by the insulated wire cores more than two, outer surface at cable core is disposed with flame retardant polyester belt 12, copper wire woven shield 13, high flame resistance, low smoke Halogen oxygen barrier layer 14 and tear-proof silicon rubber oversheath 15 from inside to outside, is filled with the packed layer 16 that constitutes with glass cord in the gap between flame retardant polyester belt 12 and teflon insulation core 11.

The utility model is owing to have the low cigarette, Halogen of good high temperature resistant and shielding properties, excellence, fire-retardant, oil resistance, radiation hardness, the damage accident of anti-cooling agent the (LOCA) and high insulating property, can be used as the IE level K1 class nuclear island cable of nuclear power station, cocoa reduces the construction cost of nuclear power station significantly after this product lot quantity production, improve the nuclear power station reliability of operation, can reach in 250 environment of spending in nuclear reactor ambient temperature on every side and use.

The foregoing description only is one of preferred embodiment of the present utility model; be not to limit practical range of the present utility model with this; so: all equivalences of doing according to shape of the present utility model, structure, principle change, and all should be covered by within the protection range of the present utility model.

Claims

1, high temperature resistance cable for nuclear power station, it is characterized in that being equipped with polytetrafluoroethylene coated insulation layer formation insulated wire cores in the outer periphery of conductor, be twisted into cable core by the insulated wire cores more than two, outer surface at cable core is disposed with flame retardant polyester belt, copper wire woven shield, high flame resistance, low smoke Halogen oxygen barrier layer and tear-proof silicon rubber oversheath from inside to outside, is filled with the packed layer that constitutes with glass cord in the gap between flame retardant polyester belt and teflon insulation core.