CN212161332U

CN212161332U - Flexible anti-damage cable

Info

Publication number: CN212161332U
Application number: CN202021384311.XU
Authority: CN
Inventors: 陈双全; 龙云; 徐雄; 陈卓
Original assignee: Guang'an Jinyouda Electrical Technology Co ltd
Current assignee: Guang'an Jinyouda Electrical Technology Co ltd
Priority date: 2020-07-14
Filing date: 2020-07-14
Publication date: 2020-12-15
Anticipated expiration: 2030-07-14

Abstract

The utility model discloses a flexible damage prevention cable belongs to power cable technical field, include: the method comprises the following steps: the cable comprises a cable core, a triangular protection tube, a belting layer, an armor layer and an outer sheath. This flexible damage prevention cable is equipped with the triangle-shaped protection tube at the cable core skin, can stabilize the protection cable core and also provide removable cavity for the cable core, conveniently carries out the cable core and changes. Meanwhile, the triangular protection tube is provided with a bendable mechanism, so that the triangular protection tube is flexible and bendable, the maximum bending angle of the triangular protection tube is a fixed value, and the damage caused by overlarge bending angle due to construction misoperation is avoided. Also be equipped with the metal and detect the fine rule in the cable inner layer structure, thereby the cable layer structure can arouse the fine rule fracture to reflect the cable damage condition if damaging, is a practical simple and convenient damage prevention detection mode.

Description

Flexible anti-damage cable

Technical Field

The utility model belongs to the technical field of power cable, specifically speaking relates to a flexible damage prevention cable.

Background

There are many causes of cable damage, with cable failure due to mechanical damage accounting for a significant proportion of cable accidents. Some mechanical injuries are minor, causing no failure at the time, but the injury site develops a failure after months or years. The main reasons for causing the mechanical damage of the cable include that the cable is damaged by pulling due to overlarge mechanical traction force or excessive bending during installation, and direct external force damage or breakage is caused by urban construction or land settlement. The prior art is to add the armor in order to increase the hardness of cable protection layer. However, after the armor layer is additionally arranged, the actually allowable bending radius of the cable is not a clear fixed number on the standard, and in the actual construction and installation process, a plurality of technical workers can also increase the tension and bending of the cable due to the fact that the cable with the armor layer is considered to be resistant to tension and bending, so that the internal damage of the cable is caused. The prior conventional technology has no real-time and efficient detection means, only by visual observation, and even if the inside of the cable is damaged in the installation process, an installer cannot know the damage.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: the utility model provides a flexible protection against damage and take damage detection cable that can bend and have bending protect function to solve current problem.

In order to realize the purpose, the utility model discloses a technical scheme be:

there is provided a flexible damage-proof cable comprising: the cable comprises a cable core, a triangular protection tube, a belting layer, an armor layer and an outer sheath; the triangular protection tube is internally provided with an inner triangular support formed by connecting triangular three-side central lines, a bendable mechanism is arranged at the joint of two axial triangular protection tubes of the cable, a plurality of detection lines are arranged in the cable core, and a plurality of detection lines are also arranged in the belt layer.

The surface formed by a central line of a triangular shape of the triangular protection pipe and the central axis of the cable is a first radial surface, the bendable mechanism comprises two rotating knobs, the rotating knobs are arranged on the central axis of the cable on the first radial surface, the rotating knobs are arranged at the pipe wall joints of the two triangular protection pipes, and one triangular protection pipe is provided with oblique notches from the positions of the knobs to two sides at the joints to form a rotating reserved space.

A plane perpendicular to the first radial plane and collinear with the central axis of the cable is defined as a second radial plane, and the triangular protective tube is provided with a similar bendable mechanism on the second radial plane adjacent to the one bendable mechanism.

The cable core includes conductor and insulating layer, the cable core is located the triangle-shaped protection tube, be the intussuseption layer between cable core and the triangle-shaped protection tube, be outer filling layer between triangle-shaped protection tube and the band layer, the band outside is provided with the armor, and the armor outside is provided with the oversheath.

The detection line is a metal line.

The detection lines are arranged in the axial direction of the cable in a mode of spirally winding in a layer structure.

Since the technical scheme is used, the beneficial effects of the utility model are that: this flexible damage prevention cable is equipped with the triangle-shaped protection tube at the cable core skin, can stabilize the protection cable core and also provide removable cavity for the cable core, makes things convenient for the cable core to damage the change. Meanwhile, the triangular protection pipe is provided with a bendable mechanism, so that the triangular protection pipe can be flexibly bent, the maximum bending angle is a fixed value, and the bending damage caused by construction misoperation is avoided within the range of the allowed bending angle. Also be equipped with the metal and detect the fine rule among the inside lamellar structure of cable, thereby the cable layer structure arouses the fine rule fracture to reflect the cable damage condition if damaging, is a practical simple and convenient damage prevention detection mode.

Drawings

Fig. 1 is a schematic axial cross-sectional structure diagram of the flexible damage-proof cable.

Fig. 2 is a schematic view of a bendable mechanism.

Reference numerals: the cable comprises a cable core 1, a triangular protection tube 2, a belting layer 3, an armor layer 4, an outer sheath 5, an inner filling layer 6, an outer filling layer 7, an inner triangular support 8, a bendable mechanism 9, a rotary knob 10 and a detection line 11.

Detailed Description

Referring to fig. 1, there is provided a flexible damage preventing cable including: the cable comprises a cable core 1, a triangular protection tube 2, a belting layer 3, an armor layer 4 and an outer sheath 5; the cable core 1 comprises a conductor and an insulating layer, the cable core 1 is located in the triangular protection tube 2, an inner filling layer 6 is arranged between the cable core 1 and the triangular protection tube 2, an outer filling layer 7 is arranged between the triangular protection tube 2 and the belting layer 3, an armor layer 4 is arranged on the outer side of the belting, and an outer sheath 5 is arranged on the outer side of the armor layer 4.

An inner triangular support 8 formed by connecting triangular three-side central lines is arranged in the triangular protection tube 2, and the inner triangular support 8 is added in the outer triangular structure, so that the structure is more stable and has the destructiveness prevention function. Meanwhile, a replaceable cavity is provided for the inner cable core 1, if the cable core 1 is damaged, the cable core 1 only needs to be conveniently pulled out, and compared with the prior art that all layer structures are completely fixed and bonded, the flexible damage-preventing cable has better exchangeability.

The inner triangular support 8 is suitable for most three-phase cables with only three cable cores 1, if one cable core 1 or a plurality of cable cores 1 is adopted, the inner support is changed or cancelled, but the structure of the triangular protection tube is not changed.

Referring to fig. 2, a bendable mechanism 9 is arranged at a joint of two triangular protection tubes 2 in a cable axial direction, a plane formed by a central line of a triangular shape of the triangular protection tube 2 and a central axis of the cable is a first radial plane, the bendable mechanism 9 includes two rotation knobs 10, the rotation knobs 10 are arranged on the central axis of the cable on the first radial plane, the rotation knobs 10 are arranged at the pipe wall joints of the two triangular protection tubes 2, the rotation knobs 10 are equivalent to a rotation pair structure, and one of the triangular protection tubes 2 is provided with oblique notches from the knob position to two sides at the joint to form a rotation reserved space. So that the triangular protection tube 2 can be bent at a small angle.

The triangular protective tube 2 is provided with the same bendable means 9 on a second radial plane, which is perpendicular to the first radial plane and collinear with the central axis of the cable, near one bendable means 9. The triangular protection tube 2 can be bent left and right or up and down by the arrangement, and multi-directional bending is realized.

If the triangular protection tube 2 is not provided with the bendable mechanism 9, the rigidity of the cable is too high and the cable cannot be bent, which causes great difficulty in transportation and installation. The bending degree depends on the angle of the oblique incision, the inner cable core 1 and the outer layer structure can bear most bending angles without failure, and experiments are to be carried out to verify that the structural scheme for preventing bending damage is provided.

The triangular protection tube 2 can be made of hard plastics or metal, the metal has stronger protection and damage resistance, but the electric conduction of the metal can influence the transportation performance of the cable core 1, and preferably, the hard plastics are selected.

The cable core 1 is internally provided with a plurality of detection lines 11, the detection lines 11 in the cable core 1 are arranged in an insulating layer, the insulating layer also comprises a shielding layer necessary for the cable, and the belting layer 3 is also internally provided with a plurality of detection lines 11. And the detection device is respectively used for detecting whether the cable core 1 and the outer layer protection layer structure are damaged or not and giving an alarm.

The detection line 11 is a metal wire, preferably a thin metal wire, and the detection principle is that if the cable is damaged by impact, breakdown or corrosion, the layer structure of the cable is damaged, the thin metal wire in the layer structure is also broken, and whether the cable is damaged can be checked by detecting the breakage condition of the metal wire.

The detection lines 11 are arranged in the axial direction of the cable and are wound in a layer structure in a spiral mode, the detection lines 11 are prevented from being bent and broken easily when being in a stretched state, and the safety detection area is increased by adopting the spiral mode.

Claims

1. A flexible damage-resistant cable comprising: the cable comprises a cable core (1), a triangular protection tube (2), a belting layer (3), an armor layer (4) and an outer sheath (5); the method is characterized in that:

the cable is characterized in that an inner triangular support (8) formed by connecting triangular three-side central lines is arranged in the triangular protection tubes (2), a bendable mechanism (9) is arranged at the joint of the two axial triangular protection tubes (2), a plurality of detection lines (11) are arranged in the cable core (1), and a plurality of detection lines (11) are also arranged in the belting layer (3).

2. The flexible damage-proof cable according to claim 1, wherein a plane formed by a central line of the triangular shape of the triangular protection tube (2) and the central axis of the cable is a first radial plane, the bendable mechanism (9) comprises two turning knobs (10), the turning knobs (10) are arranged on the central axis of the cable on the first radial plane, the turning knobs (10) are arranged at the tube wall joints of the two triangular protection tubes (2), and one triangular protection tube (2) is provided with oblique notches from the turning knob position to two sides at the joint to form a turning reserved space.

3. Flexible atraumatic cable according to claim 2, characterized in that a plane perpendicular to the first radial plane and collinear with the cable central axis is provided as a second radial plane, the triangular protective tube (2) being provided with the same bendable means (9) on the second radial plane close to one bendable means (9).

4. The flexible damage-proof cable according to claim 1, wherein the cable core (1) comprises a conductor and an insulating layer, the cable core (1) is located in a triangular protection tube (2), an inner filling layer (6) is arranged between the cable core (1) and the triangular protection tube (2), an outer filling layer (7) is arranged between the triangular protection tube (2) and a wrapping layer (3), an armor layer (4) is arranged outside the wrapping layer, and an outer sheath (5) is arranged outside the armor layer (4).

5. Flexible atraumatic cable according to claim 1, characterized in that the detection wire (11) is a metal wire.

6. Flexible atraumatic cable according to claim 1, characterized in that the detection wire (11) is arranged in the axial direction of the cable in a way that it is helically wound in a layer structure.