CN209859680U - 66kV-500kV high-fire-resistance cable - Google Patents

Abstract

The utility model relates to a cable especially relates to a 66kV-500kV high fire-resistant type cable. The utility model provides a 66kV-500kV high fire-resistant type cable, includes the conductor, conductor outsourcing be equipped with the internal shield layer, the outside package on internal shield layer be equipped with the insulating layer, the outside package of insulating layer be equipped with the external shield layer, the outside package on external shield layer be equipped with semi-conductive buffering area, the outside package in semi-conductive buffering area be equipped with the wrinkle metal covering, the wrinkle metal covering outside be provided with fire prevention mud, the outside of fire prevention mud around having the rubber band, the outside of rubber band be provided with the oversheath. The utility model discloses fire resistance is good.

Description

66kV-500kV high-fire-resistance cable

Technical Field

The utility model relates to a cable especially relates to a 66kV-500kV high fire-resistant type cable.

Background

In power transmission line places with higher fire protection requirements, cables are required to have certain flame retardant performance, and the outer sheaths of the crosslinked polyethylene insulated power cables of 66kV or more laid in tunnels are flame retardant. With the development of society, high-voltage cables laid in tunnels are required to have the characteristic requirements of low smoke, zero halogen, flame retardance, fire resistance and the like.

However, because of its special structural characteristics, the outer sheath of the 66kV and above crosslinked polyethylene insulated power cable is generally made into flame-retardant type, but the cable has poor fire resistance, and cannot achieve the purpose of fire resistance.

For example, Chinese patent publication numbers are: CN204215801U, a crosslinked polyethylene insulated power cable announced in 2015, 3, month and 18, which comprises a water-blocking conductor, a conductor shielding layer, a crosslinked polyethylene insulating layer and an insulating shielding layer from inside to outside in sequence. The outermost layer of the crosslinked polyethylene insulated power cable further comprises an outer sheath. And a water-blocking rope, water-blocking powder and water-blocking yarn are added in the water-blocking conductor or a water-blocking tape is wrapped. And when the cable core of the water-blocking conductor is cabled, water-blocking yarns, water-blocking ropes and wrapped semi-conductive water-blocking tapes or insulating water-blocking tapes are filled. The utility model discloses an insulating power cable of crosslinked polyethylene adopts waterproofing type conductor and cable core to vertically block water. The water-blocking conductor adopts active water-blocking materials such as a water-blocking tape, water-blocking powder, a water-blocking rope, water-blocking yarn and the like. Although the utility model discloses a can take place cable joint damage or sheath when damaged under the exogenic action, moisture or moisture will be absorbed by water-blocking material along the vertical infiltration of the conductive wire core of cable and cable core, block infiltration passageway to guarantee cable insulation safety, but the fire behavior of cable is very poor, can not reach fire-resistant purpose.

Disclosure of Invention

The utility model discloses mainly be very poor to 66kV among the prior art and above crosslinked polyethylene insulation power cable's fire resistance, can not reach fire-resistant problem, provide a high fire-resistant type cable of 66kV-500kV that fire resistance is good.

The purpose of the utility model is mainly realized by the following scheme: the utility model provides a 66kV-500kV high fire-resistant type cable, includes the conductor, conductor outsourcing be equipped with the internal shield layer, the outside package on internal shield layer be equipped with the insulating layer, the outside package of insulating layer be equipped with the external shield layer, the outside package on external shield layer be equipped with semi-conductive buffering area, the outside package in semi-conductive buffering area be equipped with the wrinkle metal covering, the wrinkle metal covering outside be provided with fire prevention mud, the outside of fire prevention mud around having the rubber band, the outside of rubber band be provided with the oversheath. Conductor outsourcing is equipped with the internal shield layer, the outside package on internal shield layer is equipped with the insulating layer, the outside package of insulating layer is equipped with the external shield layer, the outside package of external shield layer is equipped with semi-conductive buffering area, the outside package in semi-conductive buffering area is equipped with the wrinkle metal covering, the wrinkle metal covering outside is provided with fire prevention mud, the outside of fire prevention mud is around having rubber band, the outside in rubber band is provided with the oversheath, through adding crowded fire prevention mud in wrinkle metal covering outside, wind a packet rubber band again, form the flame retardant coating, it is fire-resistant, separate oxygen, adiabatic function to have.

Preferably, a temperature measuring optical cable is arranged at the center of the conductor. The center department of conductor is provided with the temperature measurement optical cable, and the actual operating temperature of conductor can directly be measured in the setting of temperature measurement optical cable, and data is more directly perceived, more accurate, really plays the effect of intelligence temperature measurement.

Preferably, the insulating layer is a crosslinked polyethylene insulating layer. The insulating layer is a crosslinked polyethylene insulating layer and has better insulating property.

Preferably, the outer sheath is a low-smoke halogen-free flame-retardant outer sheath. The outer sheath is a low-smoke halogen-free flame-retardant outer sheath, is nontoxic and harmless to a human body, and has no pollution to the environment.

Preferably, the outer sheath is a flame-retardant polyethylene sheath. The outer sheath is a flame-retardant polyethylene sheath, and the flame-retardant effect is good.

Preferably, the rubber wrapping tape is a ceramic silicon rubber wrapping tape. The rubber wrapping tape is a ceramic silicon rubber wrapping tape, and the ceramic silicon rubber wrapping tape becomes a hard shell under flame, so that the ceramic silicon rubber wrapping tape has the functions of heat insulation and oxygen isolation, the interior of the cable is protected from being damaged by flame and high temperature, and the purpose of fire resistance is achieved.

Preferably, the corrugated metal sleeve is a corrugated copper sleeve. The corrugated metal sleeve is a corrugated copper sleeve, has high melting point and is suitable for high-fire-resistance cables.

Therefore, the utility model discloses a 66kV-500kV high fire-resistant type cable possesses following advantage: the utility model discloses simple structure, fire resistance is good, and the setting of temperature measurement optical cable can directly measure the actual operating temperature of conductor, and data is more directly perceived, more accurate, really plays the effect of intelligence temperature measurement, and the design of fire prevention mud and ceramic silicon rubber band can be when flame is down, and ceramic silicon rubber band becomes hard casing, has thermal-insulated oxygen function that separates, protects cable inside not receive flame and high temperature damage, reaches fire-resistant purpose.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Illustration of the drawings: the cable comprises a conductor 1, an inner shielding layer 2, an outer shielding layer 3, a corrugated metal sleeve 4, fireproof mud 5, a rubber wrapping tape 6, an outer sheath 7, a temperature measuring optical cable 8, an insulating layer 9 and a semi-conductive buffer tape 10.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

Example 1:

as shown in figure 1, a 66kV-500kV high-fire-resistance cable comprises a conductor 1, wherein an inner shielding layer 2 is wrapped outside the conductor 1, an insulating layer 9 is wrapped outside the inner shielding layer 2, the insulating layer 9 is a cross-linked polyethylene insulating layer 9 and has good insulating property, an outer shielding layer 3 is wrapped outside the insulating layer 9, a semi-conductive buffer belt 10 is wrapped outside the outer shielding layer 3, a corrugated metal sleeve 4 is wrapped outside the semi-conductive buffer belt 10, fire-proof mud 5 is arranged outside the corrugated metal sleeve 4, a rubber wrapping belt 6 is wrapped outside the fire-proof mud 5, an outer sheath 7 is arranged outside the rubber wrapping belt 6, the outer sheath 7 is a low-smoke halogen-free flame-retardant outer sheath 7, and is non-toxic and harmless to a human body and non-pollution to the environment, and has fire resistance and oxygen isolation by extruding the fire-proof mud 5 outside the corrugated metal sleeve 4 and wrapping the rubber wrapping belt 6 to form a fire-resistance, The function of thermal insulation.

The center department of conductor 1 is provided with temperature measurement optical cable 8, and the actual operating temperature of conductor 1 can directly be measured in the setting of temperature measurement optical cable 8, and data is more directly perceived, more accurate, really plays the effect of intelligence temperature measurement.

The rubber wrapping tape 6 is a ceramic silicon rubber wrapping tape 6, and under flame, the ceramic silicon rubber wrapping tape 6 becomes a hard shell, has the functions of heat insulation and oxygen isolation, protects the interior of the cable from being damaged by flame and high temperature, and achieves the purpose of fire resistance.

The corrugated metal sleeve 4 is a corrugated copper sleeve, has high melting point and is suitable for high-fire-resistance cables.

Example 2:

the difference between the embodiment 2 and the embodiment 1 is that the outer sheath 7 is a flame-retardant polyethylene sheath, and the flame-retardant effect is good.

It should be understood that this example is for illustrative purposes only and is not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope of the appended claims.

Claims (7)

1. The utility model provides a 66kV-500kV high fire-resistant type cable, a serial communication port, including the conductor, conductor outsourcing be equipped with the internal shield layer, the outside package on internal shield layer be equipped with the insulating layer, the outside package of insulating layer be equipped with the external shield layer, the outside package on external shield layer be equipped with semi-conductive buffering area, the outside package in semi-conductive buffering area be equipped with the wrinkle metal covering, the wrinkle metal covering outside be provided with fire prevention mud, the outside of fire prevention mud around having the rubber band, the outside of rubber band be provided with the oversheath.

2. The 66kV-500kV high-fire-resistance cable according to claim 1, wherein a temperature measuring optical cable is arranged at the center of the conductor.

3. The cable of claim 1, wherein the insulating layer is a crosslinked polyethylene insulating layer.

4. A 66kV-500kV high fire resistance cable according to claim 1, 2 or 3, wherein the outer sheath is a low smoke zero halogen flame retardant outer sheath.

5. The high flame resistance cable of 66kV-500kV according to claim 1, 2 or 3, wherein the outer sheath is a flame retardant polyethylene sheath.

6. The 66kV-500kV high-fire-resistance cable as claimed in claim 1, 2 or 3, wherein the rubber tape is a ceramic silicon rubber tape.

7. A 66kV-500kV high flame resistance cable according to claim 1, 2 or 3, characterized in that the corrugated metal sheath is a corrugated copper sheath.