CN202373359U - Novel fire-resistant and flame-retardant computer cable - Google Patents

Abstract

The utility model belongs to the field of electrical products and relates to a novel fire-resistant and flame-retardant computer cable. The cable core of the cable is composed of at least one pair of mutually twisted insulated cores, and the insulated cores are composed of a conductor and an insulating layer coated on the periphery of the conductor. composition; each pair of insulated wire cores is provided with a separate metal shielding layer; the cable core is provided with a total metal shielding layer; the cable core is provided with a low-smoke, halogen-free, flame-retardant polyolefin outer sheath; There is a core refractory insulation layer composed of ceramic fiber insulation belt and ceramic silicone rubber refractory layer. Due to the adoption of the above technical solution, the computer cable involved in the utility model has excellent low-smoke, halogen-free, flame-retardant and fire-resistant properties, and can be applied to computer control circuits with high fire protection requirements.

Description

A new type of fire-resistant and flame-retardant computer cable

technical field

The utility model belongs to the field of electrical products, and in particular relates to a novel fire-resistant and flame-retardant computer cable.

Background technique

Computer cables are cables suitable for connecting electronic computers with high requirements for anti-electromagnetic interference with rated voltages of 300/500V and below, automatic control, and instrument testing. They are widely used in modern industrial manufacturing and automation equipment applications. At present, the general-purpose computer cables are mostly made of solid or soft-structure copper conductors, high-density polyethylene insulation layers, twisted-pair cable cores, copper wire braiding or copper tape shielding, and ordinary structures of PVC outer sheaths. It does not have fire-resistant and flame-retardant properties under flame burning conditions. With the rapid development of the domestic economy, equipment, lines, and personnel in many industrial plants and public civil buildings are highly dense. Once a fire occurs, property and personnel safety will suffer heavy losses. Therefore, industrial and public civil places have increasingly demanding fire protection requirements. To improve, automatic control lines in some key fire-fighting areas require a large number of fire-resistant and flame-retardant computer cables. Existing fire-resistant computer cables use a structure in which a fire-resistant mica tape is wrapped around the conductor as a fire-resistant layer. Due to the influence of the mechanical properties of the fire-resistant mica tape itself and the quality of the wrapping, wrinkles and leaks are prone to occur when the mica tape is wrapped. and other quality defects, resulting in short-circuit breakdown between the wire cores in the case of flame burning; in addition, the existing fire-resistant computer cables use PVC outer sheath, which has poor flame retardancy when burning and releases a large amount of toxic smoke , resulting in greater hidden dangers to line equipment and personnel safety. Therefore, there is a need for a computer cable with low-smoke, halogen-free, flame-retardant and fire-resistant properties, so that it can meet the requirements of short-term safe operation of computer automatic control lines and rapid and safe evacuation of personnel under fire conditions.

Utility model content

The utility model provides a novel fire-resistant and flame-retardant computer cable, which further improves the fire-resistant performance of the computer cable on the premise of retaining the transmission performance of the existing computer control signals, and at the same time takes into account the low-smoke, halogen-free and flame-retardant performance, so as to ensure the safety of the computer cable in case of fire. Short-term safe operation of the control line under certain conditions and rapid and safe evacuation of personnel.

The technical scheme adopted in the utility model is:

A new fire-resistant and flame-retardant computer cable, the cable core of the cable is composed of at least one pair of insulated cores twisted with each other, and the insulated cores are composed of wires and insulating layers wrapped around the wires; the insulation A filling rope is provided between the cores, and a separate metal shielding layer is provided on the periphery of the insulated core; a total metal shielding layer is provided outside the cable core; the total metal shielding layer outside the cable core is overlapped and wrapped with Insulation belt; the periphery of the heat insulation belt is provided with a refractory layer; the periphery of the refractory layer is provided with an outer sheath.

In the technical solution of the utility model, it also has the following additional technical features:

The heat insulating belt and the refractory layer constitute the core refractory and heat insulating layer.

The cable includes seven cores.

The conductor is a soft structural copper conductor.

The insulating layer is high-density polyethylene or cross-linked polyethylene.

The separate metal shielding layer is copper wire braided or copper tape wrapped metal shielding layer.

The overall metal shielding layer is copper wire braided or copper tape wrapped metal shielding layer.

The thermal insulation belt is a ceramic fiber insulation belt.

The refractory layer is a ceramic silicon rubber refractory layer.

The outer sheath is a low-smoke halogen-free flame-retardant polyolefin outer sheath.

Compared with the prior art, the advantages and positive effects of the utility model are: a new fire-resistant and flame-retardant computer cable of the utility model, which further improves the performance of the computer cable on the premise of retaining the transmission performance of the existing computer control signal. Fire-resistant performance, while taking into account the low-smoke, halogen-free flame-retardant performance, to ensure the short-term safe operation of the control line and the rapid and safe evacuation of personnel under fire conditions. It has excellent low-smoke, halogen-free, flame-retardant and fire-resistant performance, and can be applied For computer control circuits with high fire protection requirements.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Fig. 1 is a schematic diagram of the structure of a novel fire-resistant and flame-retardant computer cable of the present invention.

In the figure, 1 is a conductor, 2 is an insulating layer, 3 is a filling rope, 4 is a separate metal shielding layer, 5 is a total metal shielding layer, 6 is an insulating belt, 7 is a refractory layer, and 8 is an outer sheath.

Detailed ways

Example 1

As shown in Figure 1, a new type of fire-resistant and flame-retardant computer cable, the cable core of the cable is composed of seven pairs of insulated cores twisted with each other, and the insulated cores are composed of a conductor 1 and a wire wrapped around the conductor 1. The insulation layer 2 is composed of; a filling rope 3 is provided between the insulated wire cores, and a separate metal shielding layer 4 is provided on the periphery of the insulated wire core; a total metal shielding layer 5 is provided outside the cable core; the cable core The outer total metal shielding layer 5 is overlapped with an insulating belt 6; the outer periphery of the insulating belt 6 is provided with a refractory layer 7; the outer periphery of the refractory layer 7 is provided with an outer sheath 8; 6 and refractory layer 7 constitute the core fire-resistant insulation layer; the conductor 1 is a soft structural copper conductor; the insulating layer 2 is high-density polyethylene or cross-linked polyethylene; the separate metal shielding layer 4 is copper wire braided metal Shielding layer; the total metal shielding layer 5 is a copper wire braided metal shielding layer; the insulating belt 6 is a ceramic fiber insulating belt; the refractory layer 7 is a ceramic silicone rubber refractory layer; the outer sheath 8 It is a low-smoke, halogen-free, flame-retardant polyolefin outer sheath.

Example 2

A new type of fire-resistant and flame-retardant computer cable, the difference is that the core of the cable is composed of a pair of insulated wire cores twisted with each other; the separate metal shielding layer 4 is wrapped with copper tape Metal shielding layer; the overall metal shielding layer 5 is a metal shielding layer wrapped with copper tape.

In this way, when working, a new type of fire-resistant and flame-retardant computer cable of the utility model, its conductor 1 adopts a solid or soft structure copper conductor, which has good electrical conductivity; the conductor 1 is coated with a layer of high-density polyethylene or cross-linked Polyethylene insulation layer; the cable core is twisted by multiple pairs of insulated cores, and each pair of insulated cores is twisted with different pitches; each pair of insulated cores has a separate copper wire braid or copper tape wrapped separately Metal shielding layer, copper wire braiding or copper tape wrapping outside the cable core is used as the total metal shielding layer to ensure the stable transmission of computer cable control signals; a layer of ceramic fiber insulation tape is overlapped and wrapped around the cable core, and then tightly squeezed A layer of ceramic silicone rubber refractory layer constitutes the core fire-resistant and heat-insulating layer of the cable; in the case of flame combustion, ceramic silicone rubber can form a strong fire-resistant ceramic hard shell, and together with ceramic thermal insulation belt, heat will be carried out Isolation, so that the insulated wire core inside the cable will not be heated and melted, so that it can work normally; the core fire-resistant insulation layer is tightly extruded with a low-smoke, halogen-free flame-retardant polyolefin outer sheath, which has excellent performance when the flame burns. Excellent non-flammability, and no toxic fumes are released, thus ensuring the normal operation of the computer control circuit and the rapid and safe evacuation of personnel in a short period of time; under general fire conditions, the cable outer sheath has excellent flame retardant performance, low The smoke and non-toxic performance can ensure that the cable does not prolong and run normally, and personnel can evacuate safely in time; in the burning environment of severe fire (950 ℃ ~ 1300 ℃), even if the outer sheath of the cable falls off, the core fire-resistant insulation layer will burn A solid ceramic layer is formed, which can prevent the flame from continuing to burn inward and insulate the heat, so as to ensure the smooth flow of power and signals within a certain period of time, and maximize the safety of personnel and equipment; in addition, its production process is simple, no Special equipment needs to be added, and it can be widely used in places with high fire protection requirements.

Apparently, the above-mentioned embodiments of the present utility model are only examples for clearly illustrating the present utility model, rather than limiting the implementation manner of the present utility model. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. All the implementation manners cannot be exhaustively listed here. All obvious changes or variations derived from the technical solutions of the utility model are still within the scope of protection of the utility model.

Claims (10)

1. A novel fire-resistant and flame-retardant computer cable, the cable core of the cable is made up of at least one pair of insulated wire cores twisted with each other, and the insulated wire core is composed of a wire (1) and a wire (1) that is coated on the periphery of the wire (1). The insulation layer (2) is composed of; a filling rope (3) is provided between the insulated cores, and a separate metal shielding layer (4) is provided on the periphery of the insulated cores; a total metal shielding is provided outside the cable core layer (5); it is characterized in that: the total metal shielding layer (5) outside the cable core is overlapped with an insulating belt (6); the periphery of the insulating belt (6) is provided with a fire-resistant layer (7 ); the periphery of the refractory layer (7) is provided with an outer sheath (8). 2. A new type of fire-resistant and flame-retardant computer cable according to claim 1, characterized in that: the insulating belt (6) and the fire-resistant layer (7) constitute the core fire-resistant and heat-insulating layer. 3. A new type of fire-resistant and flame-retardant computer cable according to claim 1 or 2, characterized in that: said cable includes seven cable cores. 4. A new fire-resistant and flame-retardant computer cable according to claim 1 or 2, characterized in that: the conductor (1) is a soft structural copper conductor. 5. A new fire-resistant and flame-retardant computer cable according to claim 1 or 2, characterized in that: the insulating layer (2) is high-density polyethylene or cross-linked polyethylene. 6. A new type of fire-resistant and flame-retardant computer cable according to claim 1 or 2, characterized in that: the individual metal shielding layer (4) is copper wire braided or copper tape wrapped metal shielding layer. 7. A new type of fire-resistant and flame-retardant computer cable according to claim 1 or 2, characterized in that: the overall metal shielding layer (5) is copper wire braided or copper tape wrapped metal shielding layer. 8. A new type of fire-resistant and flame-retardant computer cable according to claim 1 or 2, characterized in that: the insulating belt (6) is a ceramic fiber insulating belt. 9. A new fire-resistant and flame-retardant computer cable according to claim 1 or 2, characterized in that: the fire-resistant layer (7) is a ceramic silicon rubber fire-resistant layer. 10. A new fire-resistant and flame-retardant computer cable according to claim 1 or 2, characterized in that: the outer sheath (8) is a low-smoke, halogen-free, flame-retardant polyolefin outer sheath.

Images