CN209591644U - Fire-resistant water-blocking halogen-free low-smoke rat-proof and termite-proof medium-voltage power cable - Google Patents

Abstract

The utility model discloses a fire-resistant, water-blocking, halogen-free, low-smoke, rodent-proof and ant-proof medium-voltage power cable, which comprises a plurality of insulated wire cores, and wrapping layers, insulating wires and insulating wire cores which are sequentially wrapped around the several insulated wire cores from the inside to the outside. Water layer, water blocking tape layer, water cooling layer, water cooling tape layer, refractory layer, refractory tape layer and outer sheath; the insulated wire core includes conductor, conductor shielding layer, insulation layer, insulation A shielding layer and a metal shielding layer; the water-cooling layer is composed of several hollow metal wires, and the inside of the hollow metal wires is a cold water flow channel; the refractory layer is extruded from ceramic polyolefin materials. The fire-resistant, water-blocking, halogen-free, low-smoke, rodent-proof and ant-proof medium-voltage power cable of the utility model not only has the advantages of simple structure, convenient installation and laying, excellent insulation performance and high mechanical strength of traditional medium-voltage cables, but also has good Fire-resistant, water-blocking, halogen-free and low-smoke, rodent-proof, tensile properties, power supply safety and reliability are good.

Description

A fire-resistant, water-blocking, halogen-free, low-smoke, rodent-proof, and ant-proof medium-voltage power cable

technical field

The utility model relates to the technical field of cables, in particular to a fire-resistant, water-blocking, halogen-free, low-smoke, rat-proof, and ant-proof medium-voltage power cable.

Background technique

XLPE insulated cables have been widely used due to their simple structure, excellent insulation performance, high mechanical strength, light weight, and convenient installation and laying. In recent years, the number of power supply system interruption accidents caused by power cable fire, rat ant damage, and mechanical damage has continued to increase. Rat ants have higher requirements on performance, power supply security and reliability.

Utility model content

In view of the above problems, the purpose of this utility model is to provide a fire-resistant, water-blocking, halogen-free, low-smoke, rodent-proof and ant-proof medium-voltage power cable, which not only has the advantages of simple structure, convenient installation and laying, excellent insulation performance and high mechanical strength of traditional medium-voltage cables. Advantages, but also has good fire resistance, water resistance, halogen-free low-smoke, rodent-proof, tensile properties, power supply security and reliability are good.

In order to achieve the above purpose, the utility model provides a fire-resistant, water-blocking, halogen-free, low-smoke, rodent-proof and ant-proof medium-voltage power cable, which includes several insulated cores and is wrapped around several insulated cores from inside to outside. protection layer, armor layer, anti-rodent and ant layer, and outer sheath; the insulated wire core includes a conductor, a conductor shield, an insulation layer, an insulation shield and a metal shield from the inside to the outside; several of the insulation The inner gap of the wire core is filled with rock wool rope; the outer gap of several insulated wire cores is extruded with an oxygen barrier layer; the gap between the oxygen barrier layer and the protective layer is filled with a refractory layer; The armor layer is formed by winding galvanized steel wire; the outer sheath layer is formed by extrusion of halogen-free low-smoke flame-retardant polyolefin sheath material.

Further, the conductor is formed by regular twisting and compacting of copper single wires.

Further, the conductor shielding layer, insulating layer, and insulating shielding layer are processed by three-layer co-extrusion.

Further, the metal shield is formed by overlapping and wrapping soft copper strips.

Further, the oxygen barrier layer is extruded from cross-linked polyethylene insulating material.

Further, the refractory layer is extruded from magnesium oxide refractory mud.

Further, the protective layer is extruded from cross-linked polyethylene insulating material.

Further, the rodent-proof layer is extruded from nylon sheath material.

Compared with the prior art, the fire-resistant, water-blocking, halogen-free, low-smoke, rodent-proof and ant-proof medium-voltage power cable provided by the utility model has the following technical effects:

The fire-resistant, water-blocking, halogen-free, low-smoke, rodent-proof, and ant-proof medium-voltage power cable described in the utility model is successively extruded with an oxygen barrier layer and a fire-resistant layer at the outer gap of the insulated wire core, and wrapped outside the fire-resistant layer. Covered with a protective layer, so as to ensure that the cable described in the utility model has good fire resistance; by using galvanized steel wire armor to ensure that the cable has good tensile capacity; by designing an anti-rodent layer to ensure that the cable has good anti- Rodent ants and water resistance; at the same time, the outer sheath of halogen-free low-smoke flame-retardant polyolefin is designed to ensure that the cable has good halogen-free low-smoke flame-retardant performance.

Description of drawings

Fig. 1 is a schematic structural diagram of a fire-resistant, water-blocking, halogen-free, low-smoke, rodent-proof, and ant-proof medium-voltage power cable in an embodiment of the present invention.

Among them, 1. Conductor, 2. Conductor shielding layer, 3. Insulating layer, 4. Insulating shielding layer, 5. Metal shielding layer, 6. Rock wool rope, 7. Oxygen barrier layer, 8. Fire-resistant layer, 9. Protective layer , 10, the armor layer, 11, the rodent-proof layer, 12, the outer sheath.

Detailed ways

In the description of the present utility model, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplified descriptions, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

As shown in Figure 1, a fire-resistant, water-blocking, halogen-free, low-smoke, rodent-proof, and ant-proof medium-voltage power cable described in the embodiment of the utility model includes several insulated wire cores and is wrapped in several insulated wire cores sequentially from the inside to the outside. The protective layer 9, the armor layer 10, the rodent-proof layer 11, and the outer sheath 12 on the outside of the core; the insulated core includes a conductor 1, a conductor shielding layer 2, an insulating layer 3, and an insulating shielding layer from the inside to the outside. 4 and metal shielding layer 5; the inner gaps of several insulated wire cores are filled with rock wool rope 6; the outer gaps of several insulated wire cores are extruded with oxygen barrier layer 7; the oxygen barrier layer 7 The gap between the protective layer 9 and the protective layer 9 is filled with a refractory layer 8; the armor layer 10 is wound by galvanized steel wire; the outer sheath 12 is extruded by a halogen-free low-smoke flame-retardant polyolefin sheath material made;

The fire-resistant, water-blocking, halogen-free, low-smoke, rodent-proof, and ant-proof medium-voltage power cable described in the utility model is successively extruded with an oxygen barrier layer 7 and a fire-resistant layer 8 at the outer gap of the insulated core, and the fire-resistant layer 8 is covered with a protective layer 9 to ensure that the cable described in the utility model has good fire resistance; by using galvanized steel wire armor, the cable has good mechanical strength and strong tensile performance; The anti-rodent and ant layer 11 is designed to ensure that the cable has good anti-rodent and water-blocking properties; at the same time, the outer sheath 12 of halogen-free, low-smoke, flame-retardant polyolefin is designed to ensure that the cable has good halogen-free, low-smoke, and flame-retardant properties.

Preferably, the conductor 1 is formed by regular twisting and pressing of copper single wires, and plays the role of transmitting electric current.

Preferably, the conductor shielding layer 2, insulating layer 3, and insulating shielding layer 4 are co-extruded by three layers of cross-linkable inner semi-conductive shielding material, cross-linked polyethylene insulation, and cross-linkable outer semi-conductive shielding material Processed, with good electrical properties.

Preferably, the metal shielding layer 5 is made of overlapping and wrapping soft copper strips, which has a good shielding effect and can serve as a short-circuit current channel.

Preferably, the oxygen barrier layer 7 is extruded from cross-linked polyethylene insulating material. The extruded tube mold is used for vacuum extrusion, the oxygen barrier layer 7 is close to the insulated wire core and embedded in the outer gap between the insulated wire cores, the oxygen barrier layer 7 can effectively isolate oxygen, and at the same time, the cross-linked polyethylene It does not melt, can effectively protect the integrity of the internal structure of the cable, and enhances the fire resistance and water resistance of the cable.

Preferably, the refractory layer 8 is extruded from magnesia refractory mud, and the magnesia refractory mud can be transformed into a non-flammable crystal at high temperature, thereby ensuring that the cable has good fire resistance and fire resistance, and greatly increasing the capacity of the medium-voltage cable. fire-resistant ability; at the same time, the cross-linked polyethylene sheath material protection layer 9 is extruded outside the fire-resistant layer 8. Cross-linked polyethylene is a thermosetting material, which does not deform or drip when heated, and can effectively protect the fire-resistant layer 8. Prevent the refractory layer 8 from cracking and falling off or water vapor entering under high temperature, and has good water resistance and protection ability.

Preferably, the rodent-proof layer 11 is extruded from a nylon sheath material. Since the nylon sheath material has excellent properties such as light weight, high mechanical strength, wear resistance, corrosion resistance, and water resistance, it is ensured that the cable has good Water-blocking, corrosion-resistant, wear-resistant, rodent-proof performance.

To sum up, the fire-resistant, water-blocking, halogen-free, low-smoke, rodent-proof, and ant-proof medium-voltage power cable described in the utility model is sequentially extruded with an oxygen barrier layer 7 and a fire-resistant layer 8 at the outer gap of the insulated core, and the The refractory layer 8 is covered with a protective layer 9, so as to ensure that the cable described in the utility model has good fire resistance; by using galvanized steel wire armor, the cable has good mechanical strength and strong tensile strength. Performance; by designing the rodent-proof layer 11 to ensure that the cable has good rodent-proof and water-blocking properties; at the same time, by designing the halogen-free low-smoke flame-retardant polyolefin outer sheath 12 to ensure that the cable has good halogen-free low-smoke flame retardancy performance.

The above are only preferred embodiments of the present utility model, and it should be pointed out that for those of ordinary skill in the art, without departing from the technical principles of the present utility model, some improvements and replacements can also be made. These improvements and replacements It should also be regarded as the protection scope of the present utility model.

Claims (8)

1. A fire-resistant, water-blocking, halogen-free, low-smoke, rodent-proof, and ant-proof medium-voltage power cable is characterized in that it includes several insulated wire cores and protective layers and armors that are wrapped around the several insulated wire cores from the inside to the outside. layer, rodent-proof layer, and outer sheath; the insulated wire core includes a conductor, a conductor shielding layer, an insulating layer, an insulating shielding layer, and a metal shielding layer from the inside to the outside; Filled with rock wool rope; the outer gaps of several insulated wire cores are extruded with an oxygen barrier layer; the gap between the oxygen barrier layer and the protective layer is filled with a refractory layer; the armored layer is made of plated Zinc steel wire is wound; the outer sheath is extruded from halogen-free low-smoke flame-retardant polyolefin sheath material. 2. The fire-resistant, water-blocking, halogen-free, low-smoke, rodent-proof, and ant-proof medium-voltage power cable according to claim 1, wherein the conductor is made of copper single wires that are twisted and pressed properly. 3. The fire-resistant, water-blocking, halogen-free, low-smoke, rodent-proof, and ant-proof medium-voltage power cable according to claim 1, wherein the conductor shielding layer, insulating layer, and insulating shielding layer are processed by three-layer co-extrusion . 4. The fire-resistant, water-blocking, halogen-free, low-smoke, rodent-proof, and ant-proof medium-voltage power cable according to claim 1, wherein the metal shielding is made of overlapping and wrapping soft copper tapes. 5. The fire-resistant, water-blocking, halogen-free, low-smoke, rodent-proof, and ant-proof medium-voltage power cable according to claim 1, wherein the oxygen barrier layer is made of extruded cross-linked polyethylene insulating material. 6. The fire-resistant, water-blocking, halogen-free, low-smoke, rodent-proof, and ant-proof medium-voltage power cable according to claim 1, wherein the fire-resistant layer is formed by extruding magnesium oxide refractory mud. 7. The fire-resistant, water-blocking, halogen-free, low-smoke, rodent-proof, and ant-proof medium-voltage power cable according to claim 1, wherein the protective layer is made of extruded cross-linked polyethylene insulating material. 8. The fire-resistant, water-blocking, halogen-free, low-smoke rodent-proof medium-voltage power cable according to claim 1, wherein the rodent-proof layer is made of extruded nylon sheath material.