CN203773985U - Halogen-free low-smoke flame-retardant crosslinked polyethylene insulated and sheath nuclear-grade thermocouple compensating cable - Google Patents

Abstract

The utility model relates to a halogen-free low-smoke flame-retardant crosslinked polyethylene insulated and sheath nuclear-grade thermocouple compensating cable and to the technical field of cable manufacture. The compensating cable comprises a cable core successively wrapped in total shielding layer, a flame-retardant glass fiber tape layer, and an irradiation crosslinked polyolefin sheath layer. A first drainage wire is arranged between the cable core and the total shielding layer. The cable core comprises a plurality of wire cores. Each wire core comprises two twisted insulated conductors which are wrapped in a copper strip layer. A second drainage wire is arranged between the copper strip layer and the two twisted insulated conductors. Each insulated conductor comprises an alloy wire conductor wrapped in an irradiation crosslinked polyolefin insulating layer. The compensating cable has not only excellent electrical performance and anti-interference performance, but also a good fire-resistant characteristic.

Description

Crosslinked polyetylene insulated and the sheathed nuclear-grade thermocouple compensation cable of LSOH anti-flaming

Technical field

The utility model relates to cables manufacturing technical field.

Background technology

Rapidly, the proportion to the year two thousand twenty nuclear power in total power generating capacity will rise to 4% from current 1.8% in China's Nuclear Power Industry development in recent years.About the investment problem of Construction of Nuclear Electricity, external economic expert thinks will complete so large-scale Nuclear power project, and by conservative estimation, investment is also more than 40,000,000,000 dollars.China National Nuclear Corporation wishes that the average localization rate of parts and components of newly-built nuclear power station can reach 60%, the goods that estimates at like this 24,000,000,000 dollars (approximately 2,000 hundred million RMB) may domesticize, though nuclear power station is the clean energy of a kind of economy, but in nuclear power plant accident, give in the past the deep lesson of people, nuclear plant safety problem is particularly important, cable is also safe key factor as the nervous system of nuclear power station, not high enough in cables manufacturing technical merit before cause, further improve again product development and technology, cable for nuclear power station market prospects are wide, high especially to its performance requirement, common core level core level thermocouple compensation cable is to reactor scram, containment isolation, reactor core is emergent cooling, and the waste heat of reactor and reactor building discharges and prevents that the electrical system device measuring of the functions such as the radioactive substance a large amount of discharges of environment towards periphery from can not meet its requirement, safety also can not get ensureing.

Utility model content

The utility model object is for above problem, a kind of low smoke, zero halogen characteristic is provided, radioresistance, water-fast pouring, when fire occurs, rate of propagation is slow, smoke density is low, the crosslinked polyetylene insulated and sheathed nuclear-grade thermocouple compensation cable of LSOH anti-flaming that pernicious gas burst size is little.

The utility model comprises cable core, in described cable core outside, sets gradually total screen, flame-proof glass fibre belt and cross-linking radiation polyolefin jacket layer; Between described cable core and total screen, the first drainage thread is set; Described cable core comprises some strand cores, and per share described core comprises respectively two mutual stranded insulated electric conductors, wrapped copper strips layer outside two mutual stranded insulated electric conductors; Between copper strips layer and two mutual stranded insulated electric conductors, the second drainage thread is set; Insulated electric conductor described in every comprises respectively B alloy wire conductor, at the outside of described B alloy wire conductor parcel irradiation crosslinked polyolefin insulating layer.

The utility model cable conductor is B alloy wire, and insulating barrier is cross-linking radiation polyolefine material; Extrude rear irradiation, conductor working temperature is minimum is 90 ℃.Every two cores are the external wrapped copper strips of a line or aluminium-plastic tape, and the stranded outer wrapped flame-proof glass fibre band after total screen copper strips or aluminium-plastic tape that arranges of rear stranding has guaranteed the anti-external interference ability of cable, transmit in time correct and information and measurement data accurately.Oversheath also adopts irradiation LSOH anti-flaming cross-linked polyolefin sheath material; Extrude the performance that irradiation has improved cable sheath, make cable there is low smoke, zero halogen characteristic, radioresistance, water-fast pouring, when fire occurs, rate of propagation is slow, and smoke density is low, and pernicious gas burst size is little, is convenient to personnel and withdraws, and has also avoided the injury to instrument and equipment.The utility model not only has good electric property and interference free performance, and has good fire-resistance property.

Accompanying drawing explanation

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

Embodiment

As shown in Figure 1, the utility model comprises cable core, in cable core outside, sets gradually total screen 1, flame-proof glass fibre belt 2 and cross-linking radiation polyolefin jacket layer 3; Between cable core and total screen 1, the first drainage thread 4 is set; Cable core comprises seven strand cores 5, and per share core 5 comprises respectively two mutual stranded insulated electric conductors 6, at two mutual stranded insulated electric conductor 6 wrapped copper strips layers 7 in outside; Between copper strips layer 7 and two mutual stranded insulated electric conductors 6, the second drainage thread 8 is set; Every insulated electric conductor 6 comprises respectively B alloy wire conductor 9, at the outside of B alloy wire conductor 9 parcel irradiation crosslinked polyolefin insulating layer 10.

Claims (1)

1. the crosslinked polyetylene insulated and sheathed nuclear-grade thermocouple compensation cable of LSOH anti-flaming, is characterized in that: comprise cable core, in described cable core outside, set gradually total screen, flame-proof glass fibre belt and cross-linking radiation polyolefin jacket layer; Between described cable core and total screen, the first drainage thread is set; Described cable core comprises some strand cores, and per share described core comprises respectively two mutual stranded insulated electric conductors, wrapped copper strips layer outside two mutual stranded insulated electric conductors; Between copper strips layer and two mutual stranded insulated electric conductors, the second drainage thread is set; Insulated electric conductor described in every comprises respectively B alloy wire conductor, at the outside of described B alloy wire conductor parcel irradiation crosslinked polyolefin insulating layer.