CN201449772U - Halogen-free low-smoke flame-retardant cross-linked polyolefin insulated and sheathed nuclear grade control cable - Google Patents

Abstract

A halogen-free, low-smoke, flame-retardant cross-linked polyolefin insulated and sheathed nuclear-grade control cable relates to the technical field of a cable structure, including seven mutually twisted wire cores, and each wire core is composed of several copper conductors and copper conductors Composed of cross-linked polyolefin insulation layer on the periphery, polyester tape is wrapped around the periphery of the seven wire cores, and the outer periphery of the polyester tape is wrapped with aluminum-plastic composite tape shielding layer, between the polyester tape and the aluminum-plastic composite tape shielding layer Set a drainage wire twisted by multiple tinned copper wires, the aluminum-plastic composite tape shielding layer is extruded with a halogen-free low-smoke flame-retardant inner sheath, and the outer periphery of the halogen-free low-smoke flame-retardant inner sheath is provided with tinned copper wires Braided shielding layer, tinned copper wire braided shielding layer is provided with a halogen-free low-smoke flame-retardant polyolefin outer sheath. The utility model not only has excellent electrical performance and anti-interference performance, but also has good fire resistance. The performance of the product meets the relevant requirements of RCC-E, the quality appraisal procedure is "K3" and meets the requirements of GB50217.

Description

Halogen-free low-smoke flame-retardant cross-linked polyolefin insulated and sheathed nuclear grade control cable

technical field

The utility model relates to the technical field of cable structure.

Background technique

With the acceleration of social and economic construction in our country, the performance requirements for cables that can perform their prescribed functions under normal conditions and seismic loads outside the containment of nuclear reactors (pressurized water reactors or boiling water reactors) in nuclear power plants are particularly high. Ordinary nuclear-grade control cables can no longer meet its requirements, and their safety cannot be guaranteed.

Utility model content

The purpose of this utility model is to provide a nuclear-grade control cable with halogen-free, low-smoke, flame-retardant cross-linked polyolefin insulation and sheath to meet the above requirements.

The purpose of this utility model is achieved in this way: a halogen-free, low-smoke, flame-retardant cross-linked polyolefin insulated and sheathed nuclear-grade control cable includes seven wire cores twisted with each other, and each wire core is composed of several copper conductors and copper wire cores. The outer circumference of the conductor is composed of cross-linked polyolefin insulation layer, and the outer circumference of the seven cores is wrapped with polyester tape, and the outer circumference of the polyester tape is wrapped with aluminum-plastic composite tape shielding layer, between the polyester tape and the aluminum-plastic composite tape shielding layer A drainage wire twisted by multiple strands of tinned copper wires is arranged between them, and the aluminum-plastic composite tape shielding layer is extruded with a halogen-free low-smoke flame-retardant inner sheath, and the outer periphery of the halogen-free low-smoke flame-retardant inner sheath is provided with tinned copper Wire braided shielding layer, the outer periphery of the tinned copper wire braided shielding layer is provided with a halogen-free low-smoke flame-retardant polyolefin outer sheath.

The utility model adopts the above design, the cable insulation is made of cross-linked polyolefin material, the working temperature of the conductor is 90°C, and the short-circuit working temperature and time are 250°C/5s. The aluminum-plastic composite tape is used for wrapping and shielding, and the outer extruded low-smoke, halogen-free and flame-retardant inner sheath is used, and the tinned copper wire braided shielding double-layer shielding structure ensures the ability of the cable to resist external interference. The outer sheath is also made of halogen-free, low-smoke, flame-retardant cross-linked polyolefin sheath material, which makes the cable have the characteristics of halogen-free and low-smoke. When a fire occurs, the spreading speed is slow, the smoke concentration is low, and the harmful gas release is small, which is convenient for personnel to evacuate. It also avoids damage to instruments and equipment. The beneficial effects of the utility model are: the utility model not only has excellent electrical performance and anti-interference performance, but also has good fire resistance. The performance of the product meets the relevant requirements of RCC-E, the quality appraisal procedure is "K3" and meets the requirements of GB50217.

Description of drawings

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

In the figure, 1 copper conductor, 2 cross-linked polyolefin insulating layer, 3 polyester tape, 4 aluminum-plastic composite tape shielding layer, 5 drain wire, 6 halogen-free low-smoke flame-retardant inner sheath, 7 tinned copper wire braided shielding layers, 8 outer sheaths of halogen-free low-smoke flame-retardant polyolefin.

Detailed ways

As shown in Figure 1, it is a nuclear-grade control cable with halogen-free, low-smoke, flame-retardant cross-linked polyolefin insulation and sheath, including seven cores twisted with each other, and each core is composed of several copper conductors 1 and copper conductors 1 The outer circumference of the cross-linked polyolefin insulation layer 2 is composed of polyester tape 3 wrapped around the outer circumference of the seven wire cores, and the outer circumference of the polyester tape 3 is wrapped with an aluminum-plastic composite tape shielding layer 4. The polyester tape 3 and aluminum-plastic composite tape A drain wire 5 twisted by multiple tinned copper wires is arranged between the shielding layers 4, and the aluminum-plastic composite tape shielding layer 4 is extruded with a halogen-free low-smoke flame-retardant inner sheath 6, and a halogen-free low-smoke flame-retardant inner sheath The outer periphery of the sheath 6 is provided with a tinned copper wire braided shielding layer 7, and the outer periphery of the tinned copper wire braided shielding layer 7 is provided with a halogen-free low-smoke flame-retardant polyolefin outer sheath 8.

Claims (1)

1. Halogen-free, low-smoke, flame-retardant cross-linked polyolefin insulated and sheathed nuclear-grade control cable, which is characterized in that it includes seven cores twisted with each other, and each core is composed of several copper conductors and copper conductors. Composed of polyolefin insulation layer, polyester tape is wrapped around the outer circumference of the seven wire cores, aluminum-plastic composite tape shielding layer is wrapped around the outer circumference of the polyester tape, and a wire made of aluminum-plastic composite tape is set between the polyester tape and the aluminum-plastic composite tape shielding layer Multi-strand tinned copper wire twisted drain wire, aluminum-plastic composite tape shielding layer is extruded with a halogen-free low-smoke flame-retardant inner sheath, and the outer periphery of the halogen-free low-smoke flame-retardant inner sheath is provided with a tinned copper wire braided shielding layer , the outer periphery of the tinned copper wire braided shielding layer is provided with a halogen-free low-smoke flame-retardant polyolefin outer sheath.

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