CN205318888U - Special waterproof cable of track traffic - Google Patents

Abstract

The utility model discloses a special waterproof cable for rail traffic, which has good waterproof performance, good stability and long service life. It includes a hollow sheath layer and a cable core, the cable core is twisted by one or several wire cores, each of the wire cores is composed of a conductor and an insulating layer arranged outside the conductor, the said The cable core is wrapped with an inner tape layer, and the inner tape layer is covered with an annular tape layer, a bonded sheath layer, an armor layer and a sheath layer in sequence.

Description

Special waterproof cable for rail transit

【Technical field】

The utility model relates to a cable, in particular to a cable used in track traffic such as railways or subways.

【Background technique】

At present, many cities in China have subways, and subways in many cities are also under construction. Because of the comfort, speed and convenience of the subway, it has become an important means of transportation for people to travel, and the subway has become an important part of many urban traffic.

As the carrier of power transportation, cables play a vital role in the power transportation of equipment. The subway relies on electricity to run, so the quality, safety and service life of cables greatly affect the safety and quality of subway transportation. The outer layer of ordinary cables is mostly made of PVC material. Such cables are not waterproof. If they are immersed in a humid environment for a long time, water vapor will penetrate into the interior of the cable, and the insulation performance of the cable will be significantly reduced, especially for high-voltage cables. For cables, the insulation will continuously produce water branches and expand until the cable breaks down, which brings great hidden dangers to the safety of electricity use. Subway cables are mainly erected in underground tunnels, and are located in the rainwater brought by humidity or rainfall all year round. Therefore, the cables used in subway tunnels need to have better waterproof performance.

【Content of utility model】

The purpose of the utility model is to effectively overcome the deficiencies of the above-mentioned technologies, and provide a special waterproof cable for rail transit, which has good waterproof performance, good stability and long service life.

The technical solution of the utility model is realized in the following way: it includes a hollow sheath layer and a cable core, and its improvement is that the cable core is twisted by one or several wire cores, each of the The wire cores are composed of a conductor and an insulating layer arranged outside the conductor. The cable core is wrapped with an inner tape layer, and the inner tape layer is sequentially covered with a ring-shaped tape layer, a bonding sheath, and an armored layer. layer and sheath layer.

In the above structure, there are three cable cores, and the insulating layer is tangent to the inner surface of the inner tape layer.

In the above structure, fillers are filled between the wire core and the inner cladding, and the fillers are water-blocking yarns, glass fibers, PP fibers, plastic strips or rubber strips.

In the above structure, the conductor is copper wire, tinned copper wire or aluminum wire.

In the above structure, the insulating layer is made of cross-linkable polyolefin material, polyvinyl chloride or rubber.

In the above structure, the inner tape layer is polyester film, PP tape or non-woven fabric.

In the above structure, the annular wrapping layer is an aluminum-plastic composite tape, a copper-plastic composite tape or a steel-plastic composite tape.

In the above structure, the bonding sheath is polyethylene or polyvinyl chloride.

In the above structure, the armor layer is a galvanized steel strip or a stainless steel strip.

In the above structure, the sheath layer is polyvinyl chloride, polyethylene, polyolefin or rubber.

The beneficial effect of the utility model is that: it is provided with a multi-layer structure, the structure is compact, and the stability is increased; Good performance, the coating on the outside of the cable core can effectively prevent water vapor from entering and increase the waterproof performance; the adhesive sheath is coated with an armor layer and a sheath layer, which can effectively protect the interior of the cable from damage by external forces and other factors , greatly improving the safety performance and service life of the cable.

【Description of drawings】

Fig. 1 is a sectional view of the utility model.

In the figure: 1. Conductor; 2. Insulation layer; 3. Inner tape layer; 4. Ring tape layer;

5. Adhesive sheath; 6. Armor layer; 7. Sheath layer; 8. Filler.

【detailed description】

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

Referring to Figure 1, the utility model discloses a special waterproof cable for rail transit, which includes a hollow sheath layer 7 and a cable core, the cable core is formed by twisting one or several wire cores, each Each of the cores is composed of a conductor 1 and an insulating layer 2 arranged on the outside of the conductor 1. The cable core is wrapped with an inner tape layer 3, and the inner tape layer 3 is covered with a ring-shaped tape layer in turn. 4. Adhesive sheath layer 5, armor layer 6 and sheath layer 7.

In a specific embodiment, the cable core is formed by twisting three wire cores with the same cross-section, each wire core is composed of a conductor 1 and an insulating layer 2 arranged outside the conductor 1, the outer surface of the insulating layer 2 and the inner wrapping tape The inner surface of the layer 3 is tangent, and the filler 8 is filled between the wire core and the inner tape layer 3 . The conductor 1 is preferably an annealed copper wire, the insulating layer 2 is preferably cross-linked polyethylene, the inner tape layer 3 is preferably a PP tape, the annular tape layer 4 is preferably an aluminum-plastic composite tape, and the bonding sheath 5 is preferably polyethylene , the armor layer 6 is preferably galvanized steel strip, the sheath layer 7 is preferably polyvinyl chloride, and the filler 8 is preferably water-blocking yarn. In specific applications, the structure of each layer can be selected according to the actual situation, for example, the conductor 1 can be tinned copper wire or aluminum wire, etc., and the material of the filler 8 can also be glass fiber, PP fiber, plastic strip, rubber strip Wait.

The outer surface of the armor layer 6 of the utility model fits the inner surface of the hollow part of the sheath layer 7, the structure is tight, and the multi-layer structure is provided with good stability. The annular wrapping layer 4 is an aluminum-plastic composite tape, and Covered with a bonded sheath 5, the two layers of materials have good waterproof performance, coupled with effective structural design, can effectively prevent water vapor from entering the cable core and increase the waterproof performance; the bonded sheath is covered with There are armor layer 6 and sheath layer 7, which can effectively protect the inside of the cable from being damaged by external forces and other factors, and greatly improve the safety performance and service life of the cable.

The special cable for rail transit provided by the utility model has reasonable structural design, waterproof, good safety protection performance, and prolongs the normal service life of the cable.

The above descriptions are only preferred embodiments of the present utility model, and the above specific embodiments do not limit the present utility model. Within the scope of the technical ideas of the present utility model, various deformations and modifications can occur, and any retouching, modification or equivalent replacement made by those skilled in the art according to the above descriptions all belong to the protection scope of the present utility model.

Claims (10)

1. A special waterproof cable for rail transit, which includes a hollow sheath layer and a cable core, characterized in that: the cable core is twisted by several wire cores, and each of the wire cores is composed of a conductor and a cable core. It consists of an insulating layer arranged outside the conductor. The cable core is wrapped with an inner tape layer, and the inner tape layer is sequentially covered with a ring-shaped tape layer, an adhesive sheath layer, an armor layer and a sheath layer. 2. The special waterproof cable for rail transit according to claim 1, characterized in that there are three said cable cores, and said insulating layer is tangent to the inner surface of said inner tape layer. 3. The special waterproof cable for rail transit according to claim 1, characterized in that: a filler is filled between the core and the inner cladding, and the filler is water-blocking yarn, glass fiber, PP fiber, plastic glue strips or rubber strips. 4. The special waterproof cable for rail transit according to claim 1, wherein the conductor is copper wire, tinned copper wire or aluminum wire. 5. The special waterproof cable for rail transit according to claim 1, characterized in that: the insulating layer is made of cross-linkable polyolefin material, polyvinyl chloride or rubber. 6. The special waterproof cable for rail transit according to claim 1, characterized in that: the inner tape layer is polyester film, PP tape or non-woven fabric. 7. The special waterproof cable for rail transit according to claim 1, characterized in that: the annular wrapping layer is an aluminum-plastic composite tape, a copper-plastic composite tape or a steel-plastic composite tape. 8. The special waterproof cable for rail transit according to claim 1, characterized in that: the bonding sheath is polyethylene or polyvinyl chloride. 9. The special waterproof cable for rail transit according to claim 1, characterized in that: the armor layer is a galvanized steel strip or a stainless steel strip. 10. The special waterproof cable for rail transit according to claim 1, characterized in that: the sheath layer is polyvinyl chloride, polyethylene, polyolefin or rubber.