CN212230107U - Flexible cable - Google Patents

Abstract

The utility model relates to a soft type cable, include: an inner layer and an outer layer; the inner layer comprises a conductor, an insulating layer and a flame-retardant layer from inside to outside in sequence; the outer layer sequentially comprises a buffer layer and an outer sheath from inside to outside; a plurality of buffer holes are formed in the buffer layer along the length of the buffer layer, and the cross section of the buffer layer is arranged in a grid shape through the plurality of buffer holes. The utility model discloses it is good to have the cable compliance, is difficult for the rupture, improves the cable quality and has prolonged the life's of cable effect.

Description

Flexible cable

Technical Field

The utility model belongs to the technical field of the technique of cable and specifically relates to a soft type cable is related to.

Background

At present, with the rapid development of national economy, cables are widely applied to various power stations, such as nuclear power stations, thermal power stations, etc., and various fields, such as subway stations, power plants, high-rise buildings, military facilities, oil platforms, etc., so that the requirements of people on the quality and functions of the cables are higher and higher.

Now, a chinese patent with publication number CN204614531U is retrieved, which discloses a cable, comprising a plurality of cable cores, a PP rope filling layer, a polyester yarn braiding layer and an outer sheath, wherein the cable cores sequentially comprise a plurality of conductors, color bands and polyolefin inner sheaths from inside to outside, and metal braiding layers braided by copper-plastic composite tapes are arranged between the conductors and the color bands in the cable cores and between the polyester yarn braiding layer and the outer sheath.

The above prior art solutions have the following drawbacks: the cable is usually wound into a roll in the transportation process, and the cable is unreeled when the cable needs to be laid.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims at providing a soft type cable has that the cable compliance is good, is difficult for the rupture, improves the cable quality and has prolonged the life's of cable advantage.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

a flexible type cable comprising: an inner layer and an outer layer;

the inner layer sequentially comprises a conductor, an insulating layer and a flame-retardant layer from inside to outside;

the outer layer sequentially comprises a buffer layer and an outer sheath from inside to outside;

a plurality of buffer holes are formed in the buffer layer along the length of the buffer layer, and the cross section of the buffer layer is arranged in a grid shape due to the plurality of buffer holes.

By adopting the technical scheme, the conductor in the inner layer of the cable realizes the conductive work of the cable; the cable is when bending, and the net atress in the buffer layer is out of shape, and the buffer hole that is in the bending inside is compressed, and the buffer hole that is in the bending outside is stretched, and shape change through the buffer hole cushions the deformation of cable for the cable can realize the bending of bigger angle, and the buffer layer protects crooked cable, and cracked possibility when having reduced the cable bending has improved the quality of cable and has prolonged the life of cable.

The utility model discloses can further configure to in a preferred example, integrated into one piece has a plurality ofly and its length unanimous stiffener in the buffer layer, the stiffener is located the setting of net handing-over department of buffer layer.

Through adopting above-mentioned technical scheme, the net handing-over department of reinforcement pole to the buffer layer is consolidated, has reduced the damaged possibility when the buffer layer warp, has improved the structural strength of buffer layer.

The present invention can be further configured in a preferred embodiment, the buffer hole is filled with a rubber strip.

Through adopting above-mentioned technical scheme, the rubber banding fills the buffer hole, has reduced the possibility of buffer layer indent, conveniently maintains the normal shape of cable, and after cable bending deformation, because the elasticity of rubber banding has made things convenient for the cable return, has reduced the possibility of cable damage.

The present invention can be further configured in a preferred embodiment, wherein the outer sheath is wrapped with a metal mesh.

Through adopting above-mentioned technical scheme, the metal mesh in the oversheath can regard as the shielding layer to use on the one hand, has reduced the influence when external world moves the cable, and on the other hand, when the cable was crooked, the metal mesh has improved the ductility of oversheath, and the metal mesh conveniently maintains the crooked state of cable.

The utility model discloses can further configure to in a preferred example, the conductor is equipped with three, three the mutual spiral winding of conductor, every all be equipped with outward the insulating layer.

Through adopting above-mentioned technical scheme, three cables have improved the direction performance of cable, because the cable intertwine to difficult separation has improved the quality of cable.

The utility model discloses can further configure to in a preferred example, the outside on fire-retardant layer is equipped with the back up coat.

Through adopting above-mentioned technical scheme, the back up coat protects the inlayer, and when the cable was crooked, the structure of inlayer is difficult for the atress to warp under the protection of back up coat, has maintained the normal use of cable.

The utility model discloses can further configure to in a preferred example, the back up coat includes articulamentum and metal level, the articulamentum be used for with the periphery side laminating on fire-retardant layer is fixed, the metal level is stainless steel band.

By adopting the technical scheme, the connecting layer conveniently enables the metal layer to be fixedly sleeved on the outer side of the flame-retardant layer, the possibility of separation of the reinforcing layer and the flame-retardant layer is reduced, the metal layer protects the inner layer, and the possibility of deformation of the inner layer during bending is reduced.

The present invention in a preferred embodiment may be further configured such that the buffer layer is a crosslinked polyethylene layer.

By adopting the technical scheme, the crosslinked polyethylene has good elasticity and heat resistance, so that the normal work of the buffer layer is conveniently maintained, and the flexibility of the cable is improved.

To sum up, the utility model discloses a following beneficial technological effect:

1. when the cable is bent, the buffer layer is deformed, the buffer hole is stretched or shrunk, the buffer layer is not easy to damage due to the fact that the buffer layer has deformation allowance when the cable is bent, meanwhile, the buffer layer coats the inner layer of the cable, and when the cable is bent, the buffer layer bears most deformation amount, the possibility of damage to the inner layer is reduced, the cable is not easy to break, and the quality of the cable is improved;

2. the metal mesh in the outer sheath enhances the ductility of the cable, and when the cable is bent, the outer sheath is not easy to break, so that the quality of the cable is improved.

3. The structure of the inner layer is maintained by the reinforcing layer, and therefore the inner layer is not easy to deform when bent, and the structural strength of the inner layer is improved.

Drawings

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

Reference numerals: 1. a conductor; 2. an insulating layer; 3. a flame retardant layer; 4. a buffer layer; 5. an outer sheath; 6. a reinforcing rod; 7. a rubber strip; 8. a metal mesh; 9. a reinforcement layer; 10. a connecting layer; 11. a metal layer.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, for the utility model discloses a soft type cable, include: an inner layer and an outer layer.

The inner layer comprises a conductor 1, an insulating layer 2 and a flame-retardant layer 3 from inside to outside in sequence. The conductor 1 is formed by weaving a plurality of copper wires, three conductors 1 are arranged, and the three conductors 1 are spirally wound mutually. An insulating layer 2 is arranged outside each conductor 1, and the insulating layer 2 is made of rubber. The fire-retardant layer 3 is the polyethylene material, and fire-retardant layer 3 fills in the gap between three insulating layer 2, and the cladding is in the outside of three insulating layer 2. Whereby the cable is operated electrically by means of three conductors 1.

Referring to fig. 1, a reinforcing layer 9 is provided on the outer side of the flame-retardant layer 3, and the reinforcing layer 9 includes a connection layer 10 and a metal layer 11. The connection layer 10 is a glue layer and is used for fixedly attaching the metal layer 11 to the outer peripheral side of the flame retardant layer 3. The metal layer 11 is a stainless steel band, and the metal layer 11 protects the inner layer from deformation on one hand and serves as a shielding layer on the other hand, so that the influence of the outside on the cable work is reduced.

Referring to fig. 1, the outer layer comprises a buffer layer 4 and an outer sheath 5 in sequence from inside to outside.

Referring to fig. 1, the buffer layer 4 is made of cross-linked polyethylene. A plurality of buffer holes are formed in the buffer layer 4 along the length of the buffer layer, and the cross section of the buffer layer 4 is arranged in a grid shape through the plurality of buffer holes. When the cable bending deformation, buffer layer 4 takes place deformation this moment, and the buffer hole is stretched or compressed along with the deformation of buffer layer 4. The deformation of buffer layer 4 makes the cable be convenient for crooked, has improved the compliance of cable.

Referring to fig. 1, a plurality of reinforcing rods 6 having a length corresponding to the length of the cushioning layer 4 are integrally formed in the cushioning layer 4, and the reinforcing rods 6 are disposed at the junctions of the meshes of the cushioning layer 4. Reinforcing rod 6 consolidates the net handing-over department of buffer layer 4, and when buffer layer 4 deformed, buffer layer 4's the difficult fracture that takes place of net handing-over department, reinforcing rod 6 has increased the structural strength of cable.

Referring to fig. 1, in order to assist the buffer layer 4 to deform, a rubber strip 7 is filled in the buffer hole. The elasticity of rubber strip drives buffer layer 4 and maintains original shape, has reduced the possibility of buffer layer 4 indent.

Referring to fig. 1, the outer sheath 5 is made of polyethylene, and the outer sheath 5 is covered with a metal mesh 8. On one hand, the metal mesh 8 in the outer sheath 5 can be used as a shielding layer, so that the influence of the outside on the operation of the cable is reduced. On the other hand, when the cable is bent, the metal mesh 8 increases the ductility of the outer sheath 5, and the metal mesh 8 facilitates maintaining the bent state of the cable.

The implementation principle of the embodiment is as follows:

the conductor 1 in the inner layer of the cable realizes the conductive work of the cable. When the cable is bent, the lattice in the buffer layer 4 is deformed by a force, the buffer holes inside the bent portion are compressed, and the buffer holes outside the bent portion are stretched. Through the shape change of buffer hole, and cushion the deformation of cable for the cable can realize the bending of bigger angle, and buffer layer 4 protects crooked cable. The possibility of breakage of the cable during bending is reduced, the quality of the cable is improved, and the service life of the cable is prolonged.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (8)

1. A flexible cable, comprising: an inner layer and an outer layer;

the inner layer comprises a conductor (1), an insulating layer (2) and a flame-retardant layer (3) from inside to outside in sequence;

the outer layer sequentially comprises a buffer layer (4) and an outer sheath (5) from inside to outside;

a plurality of buffer holes are formed in the buffer layer (4) along the length of the buffer layer, and the cross section of the buffer layer (4) is arranged in a grid shape due to the plurality of buffer holes.

2. A flexible cable according to claim 1, wherein said buffer layer (4) has a plurality of reinforcing rods (6) formed integrally therein, said reinforcing rods (6) being disposed at the junctions of the grids of said buffer layer (4).

3. A flexible cable according to claim 2, wherein said buffer holes are filled with rubber strips (7).

4. A flexible cable according to claim 3, wherein said outer sheath (5) is provided with a metal mesh (8).

5. A flexible cable according to claim 1, wherein said conductors (1) are provided with three, said three conductors (1) being spirally wound around each other, and said insulating layer (2) being provided outside each of said conductors (1).

6. A flexible cable according to claim 5, wherein the flame retardant layer (3) is provided with a reinforcing layer (9) on the outside.

7. A flexible cable according to claim 6, wherein the reinforcing layer (9) comprises a connecting layer (10) and a metal layer (11), the connecting layer (10) is adapted to be attached to the outer circumference of the flame-retardant layer (3), and the metal layer (11) is a stainless steel band.

8. A flexible cable according to claim 1, wherein said buffer layer (4) is a layer of cross-linked polyethylene.

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