CN202871384U - Environmental-friendly and cleaning type low-voltage multi-core flame-resistant power cable - Google Patents

Abstract

The utility model discloses an environment-friendly and clean low-voltage multi-core fire-resistant power cable, which comprises a cable core, a wrapping layer and an outer sheath; the wrapping layer wraps the cable core, and the wrapping layer and the cable There is also a filler between the cores; the outer sheath is covered on the cladding layer; the cable core is composed of a copper conductor, a ceramicized silicone rubber refractory layer and an insulating layer; the ceramicized silicone rubber is refractory A layer is coated on the copper conductor; the insulating layer is coated on the ceramized silicone rubber refractory layer. The environment-friendly and clean low-voltage multi-core fire-resistant power cable has a simple structure, not only has low production cost but also has good fire-resistant performance, and forms a hard shell under the ablation of high-temperature flames to prevent the cable from being burned out and ensure communication and power in case of fire. safe and smooth.

Description

An environmentally friendly and clean low-voltage multi-core fire-resistant power cable

technical field

The utility model relates to the technical field of low-voltage fire-resistant power cables, in particular to an environment-friendly and clean low-voltage multi-core fire-resistant power cable.

Background technique

In recent years, with the advancement of urbanization and urban planning and construction, cables are more likely to be laid underground during the transformation and construction of urban power grids. With the rapid growth of urban population, high-rise buildings, hotels, large supermarkets, hospitals, stations , With the continuous increase of airports, the construction of subways and tunnels, and the increase of large-scale public sports, entertainment venues, and public transportation facilities, the importance of fire protection and fire safety has become prominent. Unimpeded power and communication, maximizing the precious rescue time, reducing casualties and loss of life and property has become an urgent problem that people need to solve.

At present, magnesium oxide mineral fire-resistant insulated cables and mica tape-wound fire-resistant cables are generally used at home and abroad to solve the above problems, but magnesium oxide mineral fire-resistant insulated cables require special production and processing equipment, expensive materials, large capital investment, and difficult production and processing. , transportation, laying and installation are inconvenient, and the practical application is limited to a certain extent, so it is difficult to popularize and use it on a large scale. However, due to the need for multi-layer winding in the production process and the limitation of process conditions, the fire-resistant cable wound with mica tape may easily cause defects at the lap joints, and the mica tape will become brittle after fire and fall off easily, resulting in poor fire-resistant effect and difficult Ensure the safe and smooth communication and power in case of fire.

Utility model content

The technical problem to be solved by the utility model is to provide an environmentally friendly and clean low-voltage multi-core fire-resistant power cable, which has a simple structure, low production cost and good fire-resistant performance. It was burned out, which ensured the safety and unimpeded communication and power in case of fire.

In order to solve the problems of the technologies described above, the content of the technical solution adopted by the utility model is as follows:

An environmentally friendly and clean low-voltage multi-core fire-resistant power cable, which includes a cable core, a tape layer and an outer sheath; the tape layer wraps the cable core, and a There is a filler; the outer sheath is coated on the tape layer; the cable core is composed of a copper conductor, a ceramicized silicone rubber refractory layer and an insulating layer; the ceramicized silicone rubber refractory layer is coated on the on the copper conductor; the insulating layer is coated on the ceramic silicon rubber refractory layer.

The environment-friendly and clean low-voltage multi-core fire-resistant power cable of the utility model uses a ceramic silicon rubber refractory layer for its cable core, which is not only low in cost, but also starts to sinter into hard ceramics after burning for 1 to 2 minutes under the ablation of the flame. The insulating layer of the shaped shell can effectively block the flame from continuing to burn the cable, and has good fire resistance.

Preferably, the thickness of the vitrified silicone rubber refractory layer is 0.02D+1.0mm, wherein D is the outer diameter of the copper conductor.

Preferably, the number of the cable cores is four.

In order to protect the environment, the smoke produced by the cable in the early 2~3 minutes of being burned by the flame is non-toxic and halogen-free, and it can also play the role of anti-pressure protection, effectively controlling the cost of cable manufacturing and reducing the cost of cable laying. Difficulty, preferably, the outer sheath is metal armor combined with a halogen-free low-smoke outer sheath.

Preferably, the metal armor combined with a low-smoke halogen-free outer sheath layer includes a low-smoke halogen-free polyolefin inner lining layer, a galvanized or painted steel tape armor layer, and a low-smoke halogen-free outer sheath layer; The halogen-free low-smoke polyolefin inner lining is wrapped on the tape layer; the galvanized or painted steel tape armor layer is wrapped on the halogen-free low-smoke polyolefin inner lining; the halogen-free low-smoke An outer sheath wraps over the galvanized or painted steel tape armor. Among them, the halogen-free low-smoke outer sheath layer and the halogen-free low-smoke polyolefin inner lining play an environmental protection role, so that the cable produces non-toxic and halogen-free smoke within 2 to 3 minutes in the early stage of flame combustion, and galvanized or painted The steel tape armor layer plays the role of anti-pressure protection, effectively controlling the cost of cable manufacturing and reducing the difficulty of cable laying.

In order to improve the compactness of the cable and reduce the amount of smoke generated after the cable is burned, preferably, the wrapping layer is a wrapping layer of halogen-free low-smoke non-woven fabric.

Preferably, the thickness of the wrapping layer of the halogen-free low-smoke non-woven fabric is 0.2mm.

In order to improve the roundness of the cable, facilitate the laying of the cable and further reduce the amount of smoke generated after the cable is burned, preferably, the filler is a halogen-free low-smoke filler.

It should be noted that the ceramic silicone rubber refractory layer is made by adding white carbon black, silicone oil and other additives to methyl silicone rubber, adding vulcanizing agent on the open mill after mixing, and then molding and extruding to make products. , and then vulcanized at high temperature, it has non-toxic, odorless, high and low temperature resistance, ozone aging resistance, weather aging resistance, excellent electrical insulation performance, and has good processing performance of ordinary high temperature silicone rubber.

Compared with the prior art, the utility model has produced the following beneficial effects:

The environment-friendly and clean low-voltage multi-core fire-resistant power cable of the utility model uses a ceramic silicon rubber refractory layer for its cable core, which not only has low production cost, but also starts to sinter into a hard cable after burning for 1 to 2 minutes under the ablation of the flame. The insulating layer of the ceramic shell can effectively prevent the flame from continuing to burn the cable, and has good fire resistance. Moreover, the metal armor combined with the halogen-free low-smoke outer sheath is not only environmentally friendly, but also makes the smoke generated by the cable in the early 2~3 minutes of being burned by the flame non-toxic and halogen-free, and can also play a role in anti-pressure protection. Effectively control the cost of cable manufacturing and reduce the difficulty of cable laying. At the same time, the use of halogen-free low-smoke non-woven tape layer reduces the amount of smoke generated after the cable is burned. Filling the halogen-free low-smoke non-woven filler between the wrapping layer and the cable core can not only improve the roundness of the cable, but also facilitate the laying of the cable, and further reduce the damage caused by the burning of the cable. The amount of smoke produced.

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described.

Description of drawings

Figure 1 is a structural schematic diagram of an environmentally friendly and clean low-voltage multi-core fire-resistant power cable of the present invention.

Among them, 1. Cable core; 11. Copper conductor; 12. Ceramic silicone rubber refractory layer; 13. Insulation layer; 2. Filler; 3. Taping layer; 4. Outer sheath; Olefin inner liner; 42. Galvanized or painted steel tape armor layer; 43. Halogen-free low-smoke outer sheath layer.

Detailed ways

As shown in Figure 1, the environmentally friendly and clean low-voltage multi-core fire-resistant power cable of the present invention includes a cable core 1, a tape layer 3 and an outer sheath 4; the tape layer 3 wraps the cable core 1, and A filler 2 is also provided between the tape layer 3 and the cable core 1; the outer sheath 4 is covered on the tape layer 3; the cable core 1 is made of copper conductor 11, ceramic silicon The rubber refractory layer 12 and the insulating layer 13 are composed; the ceramicized silicone rubber refractory layer 12 is coated on the copper conductor 11; the insulating layer 13 is coated on the ceramicized silicone rubber refractory layer 12.

The environment-friendly and clean low-voltage multi-core fire-resistant power cable of the present utility model uses ceramic silicon rubber refractory layer 12 for the cable core 1, which is not only low in cost, but also starts to sinter into a hard cable after burning for 1 to 2 minutes under the ablation of the flame. The insulating layer of the ceramic shell can effectively block the flame from continuing to burn the cable, and has good fire resistance.

Specifically, the thickness of the ceramic silicon rubber refractory layer 12 is 0.02D+1.0mm, wherein D is the outer diameter of the copper conductor.

Specifically, the number of the cable cores 1 is four.

In order to protect the environment, the smoke produced by the cable in the early 2~3 minutes of being burned by the flame is non-toxic and halogen-free, and it can also play the role of anti-pressure protection, effectively controlling the cost of cable manufacturing and reducing the cost of cable laying. Difficulty, specifically, the outer sheath 4 is metal armor combined with a halogen-free low-smoke outer sheath.

Specifically, the metal armor combined with the low-smoke halogen-free outer sheath includes a low-smoke halogen-free polyolefin inner lining layer 41, a galvanized or painted steel tape armor layer 42, and a low-smoke halogen-free outer sheath layer 43; The halogen-free low-smoke polyolefin inner liner 41 is wrapped on the tape layer 3; the galvanized or painted steel tape armor layer 42 is wrapped on the halogen-free low-smoke polyolefin inner liner 41 ; The halogen-free low-smoke outer sheath layer 43 is wrapped on the galvanized or painted steel tape armor layer 42 . Among them, the halogen-free low-smoke outer sheath layer 43 and the halogen-free low-smoke polyolefin inner liner 41 play an environmental protection role, so that the cable produces non-toxic and halogen-free smoke within 2 to 3 minutes in the early stage of flame combustion, while galvanized or Painted steel tape armor layer 42 just plays the effect of anti-pressure protection, effectively controls the cost of cable manufacturing and reduces the difficulty of cable laying.

In order to improve the compactness of the cable and reduce the amount of smoke generated after the cable is burned, specifically, the wrapping layer 3 is a wrapping layer of halogen-free low-smoke non-woven fabric.

Specifically, the thickness of the wrapping layer of the halogen-free low-smoke non-woven fabric is 0.2 mm.

In order to improve the roundness of the cable, it is more convenient to lay the cable and further reduce the amount of smoke generated after the cable is burned. Specifically, the filler 2 is a halogen-free low-smoke filler.

It should be noted that the ceramic silicone rubber refractory layer 12 is made by adding white carbon black, silicone oil and other additives to methyl silicone rubber, adding vulcanizing agent on the open mill after mixing, and then molding and extruding. Products, after high-temperature vulcanization, have non-toxic, odorless, high and low temperature resistance, ozone aging resistance, weather aging resistance, excellent electrical insulation properties, and have good processing properties of ordinary high-temperature silicone rubber.

For those skilled in the art, various other corresponding changes and modifications can be made according to the technical solutions and ideas described above, and all these changes and modifications should fall within the protection scope of the claims of the present invention .

Claims (8)

1. environment friendly and clean type low pressure multicore fireproof power cable, it is characterized in that: it comprises cable core, belting layer and outer jacket; Described belting layer wraps up described cable core, and also is provided with filler between described belting layer and cable core; Described outer jacket is coated on the described belting layer; Described cable core is comprised of copper conductor, ceramic silicon rubber flame retardant coating and insulating barrier; Described ceramic silicon rubber flame retardant coating is coated on the described copper conductor; Described insulating barrier is coated on the described ceramic silicon rubber flame retardant coating.

2. environment friendly and clean type low pressure multicore fireproof power cable as claimed in claim 1, it is characterized in that: the thickness of described ceramic silicon rubber flame retardant coating is 0.02D+1.0mm, wherein said D is the external diameter of copper conductor.

3. environment friendly and clean type low pressure multicore fireproof power cable as claimed in claim 1, it is characterized in that: the quantity of described cable core is four.

4. such as any one described environment friendly and clean type low pressure multicore fireproof power cable of claim 1-3, it is characterized in that: described outer jacket is metal armouring associating low smoke, zero halogen outer jacket.

5. environment friendly and clean type low pressure multicore fireproof power cable as claimed in claim 4 is characterized in that: described metal armouring associating low smoke, zero halogen outer jacket comprises low smoke, zero halogen polyolefin lining layer, zinc-plated or japanning steel band armour, low smoke, zero halogen external sheath layer; Described low smoke, zero halogen polyolefin lining layer is wrapped on the described belting layer; Described zinc-plated or japanning steel band armour is wrapped on the described low smoke, zero halogen polyolefin lining layer; Described low smoke, zero halogen external sheath layer is wrapped on the described zinc-plated or japanning steel band armour.

6. environment friendly and clean type low pressure multicore fireproof power cable as claimed in claim 5, it is characterized in that: described belting layer is low smoke, zero halogen nonwoven fabrics belting layer.

7. environment friendly and clean type low pressure multicore fireproof power cable as claimed in claim 6, it is characterized in that: the thickness of described low smoke, zero halogen nonwoven fabrics belting layer is 0.2mm.

8. environment friendly and clean type low pressure multicore fireproof power cable as claimed in claim 6, it is characterized in that: described filler is the low smoke, zero halogen filler.

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