CN213635498U

CN213635498U - High-temperature-resistant fire-resistant high-voltage power cable for rail transit vehicle

Info

Publication number: CN213635498U
Application number: CN202023195994.7U
Authority: CN
Inventors: 胡少中; 鲁学; 邹宇飞
Original assignee: SHANGHAI MORN ELECTRIC EQUIPMENT CO Ltd
Current assignee: SHANGHAI MORN ELECTRIC EQUIPMENT CO Ltd
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2021-07-06
Anticipated expiration: 2030-12-24

Abstract

The utility model discloses a high temperature resistant, fire resistant and high pressure power cable for rail transit vehicles, which comprises a conductor, a conductor shield and a composite insulating layer from inside to outside on the cross section of a cable core; the conductor is the soft stranded copper conductor of high compact, the conductor shielding is the shielding layer that the semi-conductive area overlaps around the package and form, composite insulation layer includes that ceramic silica gel area winds the package inlayer, inorganic silk weaves intermediate level and the crowded package of ceramic silica gel is outer. The utility model discloses not only will have excellent no halogen, low cigarette, nontoxic, resistant oil, fire-retardant, economic nature, still have characteristics such as good crooked flexibility performance, fire-resistant water-fast spraying, fire-resistant anti mechanical impact.

Description

High-temperature-resistant fire-resistant high-voltage power cable for rail transit vehicle

Technical Field

The utility model relates to a cable field, in particular to rail transit vehicle is with high temperature resistant fire-resistant high voltage power cable.

Background

By the end of 2019, the total business mileage of the Chinese high-speed railway reaches 3.5 kilometers, which exceeds two thirds of the total mileage of the world high-speed rail, the face is the first world, and China becomes the country with the longest high-speed rail mileage, the highest transportation density and the most complex network forming operation scene in the world.

With the development of high-speed rail motor train unit vehicles, the safety awareness of people is further improved, and higher requirements are provided for power cables for rail vehicles: the cable is required to have oil resistance and flame retardance, high mechanical strength, no toxicity, environmental friendliness and more compact structure size, and more importantly, the cable can maintain power supply for a period of time under the emergency condition of fire, so that precious time is gained for escape and fire rescue of people.

At present, a high-voltage power cable for a railway vehicle is generally a European standard cable product, adopts a plastic or rubber insulation cable, has excellent halogen-free, low-smoke, non-toxic, oil-resistant and flame-retardant performances, but is not fireproof, and when a fire disaster occurs, the cable burns in case of fire, loses the insulating performance, cannot maintain continuous power supply, and cannot gain time for personnel escape and fire rescue.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model aims to provide a rail transit vehicle is with fire-resistant high temperature resistant power cable to solve the problem among the prior art.

The utility model discloses the purpose realizes like this:

the high-temperature-resistant fire-resistant high-voltage power cable for the rail transit vehicle is characterized in that a conductor, a conductor shield and a composite insulating layer are sequentially arranged on the section of a cable core from inside to outside;

the conductor be the soft stranded copper conductor of high compact, the conductor shielding is the shielding layer that the semi-conductive area overlaps around the package and form, composite insulation layer includes that ceramic silica gel area winds the package inlayer, the intermediate level is woven to the inorganic silk and the crowded package of ceramic silica gel is outer.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the cable conductor adopts a high-compression soft stranded copper conductor, the traditional anisotropic conductor stranding process is abandoned, the equidirectional small pitch is creatively adopted, the once-forming stranding process is used for production (the conductor compression coefficient is more than or equal to 95%), the flexibility of the conductor is improved, the defects that the cable conductor is hard and is not easy to bend due to anisotropic multilayer repeated stranding are thoroughly avoided, the cable has a good bending radius (the bending radius of a common copper cable is 12 times of the outer diameter, the bending radius of the cable is only 4-6 times of the outer diameter, and laying and installation are easier), the outer diameter of the cable can be reduced by 10% -15% under the condition of conductors with the same specification, the cost is reduced by about 5%, the cable is light in weight, convenient to install and lay, and is economical and applicable.

2. The conductor shield is wrapped by a semi-conductive shielding tape, the wrapping coverage rate is more than or equal to 50%, and the electromagnetic field on the surface of the conductor is effectively balanced.

3. The composite insulating layer adopts a ceramic silica gel tape wrapping (inner layer), high-strength and high-wear-resistance inorganic wire weaving (middle layer) and ceramic silica gel extruding (outer layer) structure, not only has good electrical insulating property and excellent mechanical property (shearing resistance is more than 1500N), but also has high fireproof safety performance, can not be burnt into powdery ash under the condition of flame ablation at 950 ℃ for 180min, can be formed into ceramic armor, and forms a hard shell-shaped protective layer, thereby protecting the circuit from melting and dripping under the environment of fire (950-1300 ℃), ensuring the smooth circuit under the condition of fire through the water spraying and vibration tests specified at 950 ℃ for 90min, providing guarantee for escaping and rescuing the fire, and the product can be continuously used for a long time after the fire.

The features of the present invention can be clearly understood by referring to the drawings and the following detailed description of the preferred embodiments.

Drawings

Fig. 1 is a schematic view of the present invention.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention will be further described with reference to the following embodiments.

As shown in fig. 1, the high temperature resistant, fire resistant and high voltage power cable for rail transit vehicles comprises a conductor 1, a conductor shield 2 and a composite insulating layer 3 on the cross section of a cable core in sequence from inside to outside.

The cable is characterized in that the conductor 1 is a high-compression soft stranded copper conductor, the conductor 1 abandons a traditional anisotropic conductor stranding process, the conductor is creatively produced by adopting a equidirectional small pitch and a one-step forming stranding process, the flexibility of the conductor is improved, the defects that the cable conductor is hard and is not easy to bend due to anisotropic multilayer repeated stranding are thoroughly avoided, the cable has a good bending radius (the bending radius of a common copper cable is 12 times of outer diameter, the bending radius of the cable is only 4-6 times of outer diameter, and the cable is easy to lay and install), the outer diameter of the cable can be reduced by 10-15% under the condition of the same specification of conductors, the cost is reduced by about 5%, the cable is light in weight, convenient to install and lay, and is economical and applicable.

The conductor shield 2 is wrapped by adopting a semi-conductive shielding tape, the wrapping coverage rate is more than or equal to 50 percent, and the electromagnetic field on the surface of the conductor is effectively balanced.

The composite insulating layer 3 comprises an inner layer 31, an intermediate layer 32 and an outer layer 33, wherein the inner layer 31 is wrapped by a ceramic silica gel tape, the intermediate layer 32 is woven by inorganic wires with high strength and high wear resistance, and the outer layer 33 is extruded by ceramic silica gel.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The high-temperature-resistant fire-resistant high-voltage power cable for the rail transit vehicle is characterized in that a conductor, a conductor shield and a composite insulating layer are sequentially arranged on the section of a cable core from inside to outside; the conductor be the soft stranded copper conductor of high compact, the conductor shielding is the shielding layer that the semi-conductive area overlaps around the package and form, composite insulation layer includes that ceramic silica gel area winds the package inlayer, the intermediate level is woven to the inorganic silk and the crowded package of ceramic silica gel is outer.