CN218768824U

CN218768824U - Three-core low-voltage cable

Info

Publication number: CN218768824U
Application number: CN202223397708.4U
Authority: CN
Inventors: 刘�文; 唐旭锋; 史志浩; 娄梦霞; 潘秋萍; 储凌峰
Original assignee: Jiangsu Zhixin Electric Technology Co ltd
Current assignee: Jiangsu Zhixin Electric Technology Co ltd
Priority date: 2022-12-19
Filing date: 2022-12-19
Publication date: 2023-03-28
Anticipated expiration: 2032-12-19

Abstract

The utility model discloses a three-core low-voltage cable, including the cable body, the cable body includes outer and the interior cavity of cable, the cross-section of cable body is triangle-shaped, and the cavity is provided with three cable cores of group in the cable, and three cable cores of group use the cable body mid point to be the degree range setting each other as the centre of a circle, the cable core corresponds the outer three angle setting of cable, and the outer three angular protrusion of cable is provided with a first elastic support portion, and glue fixed connection is passed through with the cable core of its contact to first elastic support portion, the space packing of cavity has the elastic filler in the cable, and when low-voltage cable received the exogenic action, external force can be passed through the outer conduction of cable and give the bolster, and the bolster can cushion external force, and rigid impact that will originally act on the conductor turns into the flexible impact, avoids external force direct action to be on low-voltage cable's conductor to it avoids it to receive the harm to protect low-voltage cable's conductor.

Description

Three-core low-voltage cable

Technical Field

The utility model relates to a cable field, concretely relates to three-core low tension cable.

Background

The cable is generally defined as a conductor which is made of one or more mutually insulated conductors and an outer insulation protective layer and transmits electric power or information from one place to another place, and is widely applied to electric power and communication transmission.

With the acceleration of urbanization in China, the cable is widely applied to underground power transmission and temporary occasions such as meeting places, construction sites and the like due to excellent insulating property and wear-resistant and moisture-proof properties. In the actual use process, a single-core power cable is often adopted, but the method of peeling off sheaths and insulation on site and selecting epoxy resin and other insulating materials for encapsulation treatment after the branch or the joint is pressed is adopted for the joint and the branch, the defects of large site occupation, long construction time, high cost, more equipment, high technical condition requirement, high difficulty and the like still exist, and especially the insulation strength, reliability and consistency of the joint or the branch after the site construction is finished are difficult to be ensured.

On the other hand, most of common cables are erected in the air for use, the tensile and wind resistance performance is basically considered, however, a part of the low-voltage cables are used temporarily and emergently, various mobile electrical equipment or light mobile electrical equipment or ground low-voltage cables used for temporary construction on a construction site, the low-voltage cables are laid or placed back and forth close to the ground due to the requirement of the use occasion, but in the existing technology, the paved low-voltage cables are basically ordinary transmission cables, have insufficient performance, are easy to damage, short circuit, electric leakage and the like, and therefore the cables are required to have certain compressive and torsional resistance under the premise of certain flexibility and convenience in rolling so as to meet the torsion and the like caused by rolling and rolling of foreign objects in use, and the quality and safety of the cables are ensured.

Chinese patent No. 201320075539.4 discloses a low-voltage cable, which comprises a conductor and an insulating layer, wherein the conductor comprises a first conductor and a second conductor adjacent to the first conductor, concentric conductors are uniformly distributed around the first conductor and the second conductor, the insulating layer comprises a first insulating layer and a second insulating layer, the first insulating layer is arranged on the outer side of the concentric conductors, and the second insulating layer is wrapped outside the first insulating layer.

Above-mentioned improvement has adopted the twin-core of first conductor and second conductor side by side, and the parcel has the structure of first insulating layer and second insulating layer around first conductor and the second conductor in proper order, can effectively reduce area, and the insulating degree is high, but its compressive capacity still exists not enoughly.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model discloses an overcome the problem that prior art exists, provide for solving above-mentioned problem, the utility model discloses a following technical scheme: the utility model provides a three-core low-voltage cable, when the cable receives the exogenic action, external force can be passed through the outer conduction of cable and give the bolster, the bolster can cushion external force, rigid impact who will act on the conductor originally turns into flexible impact, avoid external force direct action on low-voltage cable's conductor, thereby the conductor of protection low-voltage cable avoids it to receive the harm, through setting up the flame retardant coating respectively with the cable core outer layer, the insulating degree is higher, fire behavior is better.

The utility model provides a three-core low-voltage cable, includes the cable body, and the cable body includes outer and the cable cavity in, the cross-section of cable body is triangle-shaped, and the cavity is provided with three group's cable cores in the cable, and three group's cable cores use the cable body mid point to be the degree each other and arrange the setting as the centre of a circle, the cable core corresponds the outer three angle setting of cable, and the salient is provided with a first elastic support portion in the outer three angle of cable, and glue fixed connection is passed through with the cable core of its contact to first elastic support portion, the space packing of the cavity has the elasticity filler in the cable.

Preferably, three corners of the triangle of the cable body are rounded corners.

Preferably, the straight edge of the cable outer layer is provided with a second elastic supporting part in an inward protruding mode.

Preferably, the straight edge center of the cable outer layer is connected with the center of the cable body through the support isolation layer.

Preferably, the outer layer of the cable is sequentially provided with a protective layer, a first fireproof layer and a first insulating layer from outside to inside.

Preferably, the cable core is provided with a second fireproof layer, a second insulating layer and a conductor in sequence from outside to inside.

Preferably, the elastic filler of the cable inner cavity is polypropylene fiber.

Preferably, the elastic modulus of the first elastic supporting part and the second elastic supporting part is greater than that of the elastic filler.

Has the advantages that: compared with the prior art, the utility model has the advantages of it is following:

1. when the low tension cable receives the exogenic action, external force can be passed through the outer conduction of cable and give the bolster, and the bolster can cushion external force, and rigid impact that will act on the conductor originally turns into flexible impact, avoids external force direct action on the conductor of low tension cable to the conductor of protection low tension cable avoids it to receive the harm.

2. Through setting up the flame retardant coating respectively with cable skin and cable core, the insulating layer, the insulating degree is higher, and fire behavior is better.

Drawings

FIG. 1 is a sectional view of a first embodiment of the present invention;

FIG. 2 is a sectional view of a second embodiment of the present invention;

fig. 3 is a cross-sectional structural view of the cable core of the present invention;

wherein: 1. a cable body; 2. an outer layer of the cable; 21. a protective layer; 22. a first fire resistant layer; 23. a first insulating layer; 3. a cable inner cavity; 4. a cable core; 41. a second fire-resistant layer; 42. a second insulating layer; 43. a conductor; 5. a first elastic support part; 6. a second elastic support part; 7. supporting the isolation layer.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

The utility model provides a three-core low-voltage cable, includes cable body 1, and cable body 1 includes outer 2 of cable and cable in the cavity 3, the cross-section of cable body 1 is triangle-shaped, and cavity 3 is provided with three cable cores 4 in the cable, and three cable cores 4 of group use cable body 1 mid point to be 120 degrees arrangement settings each other as the centre of a circle, cable core 4 corresponds the three angle setting of outer 2 of cable, and the protrusion is provided with a first elastic support portion 5 in the three angle of outer 2 of cable, and first elastic support portion 5 passes through glue fixed connection rather than the cable core 4 of contact, cavity 3's space is filled with the elasticity filler in the cable.

When the low tension cable receives the exogenic action, external force can be passed through the outer conduction of cable and give the bolster, and the bolster can cushion external force, and rigid impact that will act on the conductor originally turns into flexible impact, avoids external force direct action on the conductor of low tension cable to the conductor of protection low tension cable avoids it to receive the harm.

Preferably, three corners of the triangle of the cross section of the cable body 1 are rounded corners.

Preferably, the straight edge of the cable jacket 2 is provided with a second resilient support 6 projecting inwardly.

Preferably, the center of the straight edge of the cable outer layer 2 is connected with the center of the cable body 1 through the support isolation layer 7.

Preferably, the cable outer layer 2 is sequentially provided with a protective layer 21, a first fireproof layer 22 and a first insulating layer 23 from outside to inside.

Preferably, the cable core 4 is sequentially provided with a second fireproof layer 41, a second insulating layer 42 and a conductor 43 from outside to inside.

Preferably, the elastic filler of the inner cavity 3 of the cable is polypropylene fiber.

Preferably, the elastic modulus of the first elastic support portion 5 and the second elastic support portion 6 is greater than that of the elastic filler.

The above embodiments are intended to be illustrative, and should not be construed as limiting the scope of the invention, and the technical solutions, objects and effects of the present invention are described in full herein.

The above embodiments are not intended to be exhaustive list of the present invention, and there may be many other embodiments not listed. Any replacement and improvement made on the basis of not violating the concept of the utility model belong to the protection scope of the utility model.

Claims

1. A three-core low-voltage cable is characterized in that: including cable body (1), cable body (1) includes outer (2) of cable and cavity (3) in the cable, the cross-section of cable body (1) is triangle-shaped, and cavity (3) are provided with three cable core (4) of group in the cable, and three cable core (4) of group use cable body (1) mid point to be 120 degrees arrangements each other and set up as the centre of a circle, cable core (4) correspond the three angle setting of the outer (2) of cable, and the three angular inner protrusion of the outer (2) of cable is provided with one first elastic support portion (5), and first elastic support portion (5) pass through glue fixed connection rather than cable core (4) of contact, the space packing of cavity (3) has the elasticity filler in the cable.

2. A three-core low-voltage cable according to claim 1, characterized in that: three corners of the triangular section of the cable body (1) are rounded corners.

3. A three-core low-voltage cable according to claim 2, characterized in that: and a second elastic supporting part (6) is arranged at the straight edge of the cable outer layer (2) in an inward protruding manner.

4. A three-core low-voltage cable according to claim 2, characterized in that: the straight edge center of the cable outer layer (2) is connected with the center of the cable body (1) through the supporting isolation layer (7).

5. A three-core low-voltage cable according to claim 1, characterized in that: the cable outer layer (2) sequentially comprises a protective layer (21), a first fireproof layer (22) and a first insulating layer (23) from outside to inside.

6. A three-core low-voltage cable according to claim 1, characterized in that: the cable core (4) is sequentially provided with a second fireproof layer (41), a second insulating layer (42) and a conductor (43) from outside to inside.

7. A three-core low-voltage cable according to claim 1 or 3, characterized in that: the elastic filler of the cable inner cavity (3) is polypropylene fiber.

8. A three-core low-voltage cable according to claim 3, characterized in that: the elastic modulus of the first elastic supporting part (5) and the second elastic supporting part (6) is larger than that of the elastic filler.