CN211181684U

CN211181684U - Bending-resistant medium-high voltage cable

Info

Publication number: CN211181684U
Application number: CN202020034583.0U
Authority: CN
Inventors: 徐季新; 黄建卫; 邱金波; 张天成; 黄桂领; 王世军
Original assignee: Zhejiang Zetastone Special Cable Co ltd
Current assignee: Zhejiang Zetastone Special Cable Co ltd
Priority date: 2020-01-08
Filing date: 2020-01-08
Publication date: 2020-08-04
Anticipated expiration: 2030-01-08

Abstract

The utility model relates to the technical field of cable manufacturing, in particular to a bending-resistant medium-high voltage cable, which comprises a wire core and a semiconductor layer wrapped outside the wire core, insulating rubber is filled between the wire core and the semiconductor layer, a copper strip shielding layer is sleeved outside the semiconductor layer, an elastic structure layer is arranged outside the copper strip shielding layer and comprises an elastic part and a connecting part, the two ends of the connecting piece are respectively connected with an elastic piece, the connecting piece comprises an inner shell and an outer shell, the two ends of the inner shell are both provided with annular grooves, the two ends of the elastic piece are fixedly provided with connecting rods, the tail ends of the connecting rods are fixedly provided with clamping blocks, the fixture block is located the annular groove, the elastic structure layer is sleeved with a cable outer protective sleeve, and the problem that the bending resistance is not strong due to the fact that a steel wire rope or a fiber rope is adopted in an existing medium-high voltage cable is solved.

Description

Bending-resistant medium-high voltage cable

Technical Field

The utility model relates to a cable manufacturing technical field especially relates to a resistant middle and high voltage cable who bends.

Background

The cable is usually made of one or more mutually insulated conductors and an outer insulation protective layer, transmits electric power or information from one place to a lead of another place, has the characteristics of internal electrification and external insulation, and has the characteristics of more and more extensive application and complex and various environments along with the development of science and technology.

In the prior art, steel wires or fiber ropes with high strength and low elongation are mostly arranged on the surface of a cable, so that the cable is always hard, and in the actual use process, the cable is easy to be subjected to frequent bending operation or lasting bending time for a long time, so that external force acts on the steel wire rope or the fiber rope, under the dynamic compression and tension forces, the steel wires or fibers affect or even destroy surrounding components such as conductors and insulation, thereby causing the distortion and displacement of the cable core inside and even the fracture phenomenon, particularly the cable sheath is easy to fracture, the inner core is exposed, the potential safety hazard exists, because the steel wire or the fiber rope has poor elasticity and poor resilience, when the cable is bent or extruded, the bending or extrusion part cannot automatically relax, and the bending or extrusion part of the cable is easy to deform and damage.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a medium and high voltage cable that is more resistant to tear, resistant crooked for solve current medium and high voltage cable owing to adopt wire rope or fiber rope, lead to the not strong problem of bending resistance.

The utility model discloses an above-mentioned technical problem is solved to following technical means:

the utility model provides a resistant crooked well high tension cable, has semiconductor layer including sinle silk and sinle silk outer parcel, it has insulating rubber to fill between sinle silk and the semiconductor layer, the semiconductor layer overcoat is equipped with the copper strips shielding layer, the elastic construction layer is installed outward to the copper strips shielding layer, the elastic construction layer includes elastic component and connecting piece, the both ends of connecting piece are connected with the elastic component respectively, the connecting piece includes inner shell and shell, the annular groove has all been seted up at the both ends of inner shell, the both ends fixed mounting of elastic component has the connecting rod, the terminal fixed mounting of connecting rod has the fixture block, the fixture block is located the annular groove, the outer cover of elastic construction layer is equipped.

Further, the inner shell is sleeved on the copper strip shielding layer, the spring is sleeved on the inner shell, a plurality of first grooves are formed in the circumferential outer wall of the inner shell, a plurality of second grooves are formed in the position, corresponding to the first grooves, of the outer shell, gaps between the first grooves and the second grooves and the spring correspond to the gaps between the first grooves and the second grooves, the elastic sheets are clamped in the gaps between the spring and are arranged in a clamping mode, and the elastic sheets are clamped in the first grooves and the second grooves, so that the inner shell, the outer shell and the spring are connected.

Furthermore, a through groove is formed in the clamping block, the width of the through groove is the same as the diameter of the spring, and the tail end of the spring is clamped into the through groove, so that the clamping block is connected with the spring in the annular groove, and the elastic element is connected with the spring.

Furthermore, one end of the elastic part is connected with one end of the spring through the connecting rod and the clamping block, and the other end of the elastic part is connected with the other end of the spring through the same connecting rod and the same clamping block, so that the elastic part and the connecting piece are repeatedly connected to form an elastic layer.

Further, outer protective sheath is insulating rubber, sets up like this, makes outer protective sheath more wear-resisting, also is able to bear or endure crooked to a certain extent simultaneously.

The utility model relates to a bending-resistant medium-high voltage cable, which is provided with insulating rubber on a wire core and a semiconductor layer piece to avoid partial discharge between the wire core and the insulating rubber; both ends through the elastic component are provided with connecting rod and fixture block, and the spring is established to the cover in the connecting piece, fixture block and spring joint, make the cable when crooked, no matter which position at the cable is crooked, can both pass through being connected of elastic component and connecting piece, make the cable more have the bending resistance, avoided current well high voltage cable owing to adopt wire rope or fiber rope, lead to the not strong problem of bending resistance.

Drawings

Fig. 1 is a schematic structural view of a bending-resistant medium-high voltage cable according to the present invention;

fig. 2 is a schematic cross-sectional structure view of a bending-resistant medium-high voltage cable according to the present invention;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2;

the cable comprises a cable core 1, insulating rubber 101, a semiconductor layer 2, a copper strip shielding layer 3, an elastic structure layer 4, an elastic element 401, an outer shell 402, a connecting rod 403, a fixture block 404, a through groove 405, a spring 406, a second groove 407, a first groove 408, an elastic sheet 409, an annular groove 410, an inner shell 411 and an outer protective sleeve 5.

Detailed Description

The invention will be described in detail with reference to the following drawings and specific embodiments:

as shown in fig. 1-3, the utility model discloses a resistant crooked well high voltage cable, including sinle silk 1, sinle silk 1 outer parcel has semiconductor layer 2, and it has insulating rubber 101 to fill between sinle silk 1 and the semiconductor layer 2, avoids taking place partial discharge between sinle silk 1 and the insulating rubber 101, and the semiconductor layer 2 overcoat is equipped with copper tape shield 3, and when the cable broke down, copper tape shield 3 can play the effect of short circuit passageway, simultaneously, also can shield the electromagnetic field of sinle silk 1 circular telegram production. The copper strips shielding layer 3 is externally provided with an elastic structure layer 4, so that the structure of the wire core 1 wrapped in the elastic structure layer 4 can be more resistant to bending to a certain extent, the elastic structure layer 4 is externally sleeved with an outer cable protection sleeve 5, the outer protection sleeve 5 is made of insulating rubber, the outer protection sleeve 5 is more wear-resistant, and the bending resistance degree is further increased.

Elastic structure layer 4 includes elastic component 401 and connecting piece, the connecting piece includes inner shell 411 and shell 402, the inner shell 411 cover is established on copper strip shielding layer 3, the cover is equipped with spring 406 on the inner shell 411, a plurality of first recess 408 have been seted up on the inner shell 411 circumference outer wall, a plurality of second recess 407 have been seted up for the position of first recess 408 to shell 402, first recess 408 and second recess 407 correspond with the clearance of spring 406, the card is equipped with elastic sheet 409 in first recess 408 and the second recess 407, elastic sheet 409 card is established in the clearance of spring 406, make spring 406 stable connection between inner shell 411 and shell 402, and simultaneously, make outer shell 402 and inner shell 411 connect through elastic sheet 409. Both ends of the inner shell 411 are provided with annular grooves 410, both ends of the elastic element 401 are fixedly provided with connecting rods 403, the tail ends of the connecting rods 403 are fixedly provided with clamping blocks 404, the clamping blocks 404 are provided with through grooves 405, and the width dimension of the through grooves 405 is the same as the diameter of the spring 406, so that the clamping blocks 404 can be stably clamped on the spring 406. One end of the elastic member 401 is connected to one end of the spring 406 through the connection rod 403 and the latch 404, and the other end of the elastic member 401 is connected to the other end of the spring 406 through the same connection rod 403 and the latch 404, thereby stably connecting the elastic member 401 to the connection member 402. When the cable is bent, the bent portion is located on the elastic member 401, the elastic member 401 stretches the spring 406 through the connecting rod 403 and the fixture block 404 at the two ends, so that the spring 406 stretches, the elastic member 401 is stretched due to the restoring action of the spring 406, and the fixture block 404 is in contact with the inner wall of the tail end of the annular groove 410 in a moving manner, so that once the elastic member 401 is released from the bent state, the elastic member 401 and the spring 406 are quickly restored to deform, and the bending resistance of the cable is increased to a certain extent. When the cable is bent, and the bent portion is located at the connection portion of the elastic member 401 and the connection member 402, the elastic member 401 and the connection member 402 are split, so that the connection rod 403 is exposed, and due to the bending, the connection rod 403 is bent, so that the connection rod 403 fills the split portion of the elastic member 401 and the connection member 402, external collision is avoided, and the outer protective sleeve 5 is directly damaged. When the cable is bent, the bent part is located on the connecting part 402, and the connecting part 402 connects the inner shell 411 with the outer shell 402 through the spring 406, the cable is bent and can be seen as the bending of the spring 406, and the spring 406 has the effect of restoring the deformation, so that the cable can restore the deformation by itself, and the cable is more resistant to bending.

The utility model discloses a use method as follows: when the cable is used, the elastic structure layer 4 is sleeved outside the copper shielding layer 3, the elastic structure layer 4 is connected with the connecting piece 402 through the elastic piece 401, when the bent part of the cable is positioned on the elastic piece 401, the elastic piece 401 stretches the spring 406 through the connecting rod 403 and the fixture block 404 at two ends, so that the elastic piece 401 is in a stretching state, and the elastic piece 401 is quickly restored to deform once the bending state is relieved due to the restoring action of the spring 406, so that the bending resistance of the cable is increased to a certain extent; when the cable bending part is located at the connection part of the elastic part 401 and the connection part 402, the elastic part 401 and the connection part 402 are cracked, so that the connection rod 403 is exposed, and due to the bending, the connection rod 403 is bent, so that the connection rod 403 fills the cracked part of the elastic part 401 and the connection part 402, and the external collision is avoided, and the outer protective sleeve 5 is directly damaged; when the cable bending position is located on connecting piece 402, because connecting piece 402 is connected inner shell 411 and shell 402 through spring 406, the cable is crooked, can become spring 406 crooked, and spring 406 itself has the effect of resumeing deformation to make the cable can self resume deformation, thereby make the cable more resistant crooked, avoided current well high voltage cable because adopt wire rope or fiber rope, lead to the not strong problem of resistant bending nature.

Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art will understand that the present invention can be modified or replaced with other embodiments without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims. The technology, shape and construction parts which are not described in detail in the present invention are all known technology.

Claims

1. The utility model provides a resistant crooked well high voltage cable, includes that sinle silk (1) and sinle silk (1) outer parcel have semiconductor layer (2), its characterized in that: it has insulating rubber (101) to fill between sinle silk (1) and semiconductor layer (2), semiconductor layer (2) overcoat is equipped with copper tape shield (3), copper tape shield (3) outer installation elastic construction layer (4), elastic construction layer (4) include elastic component (401) and connecting piece, the both ends of connecting piece are connected with elastic component (401) respectively, the connecting piece includes inner shell (411) and shell (402), annular groove (410) have all been seted up at the both ends of inner shell (411), the both ends fixed mounting of elastic component (401) has connecting rod (403), the terminal fixed mounting of connecting rod (403) has fixture block (404), fixture block (404) are located annular groove (410), elastic construction layer (4) overcoat is equipped with cable outer protective sheath (5).

2. The bend-resistant medium-high voltage cable according to claim 1, characterized in that: the copper strip shielding layer (3) is sleeved with the inner shell (411), the inner shell (411) is sleeved with a spring (406), a plurality of first grooves (408) are formed in the outer wall of the circumference of the inner shell (411), a plurality of second grooves (407) are formed in the position, corresponding to the first grooves (408), of the outer shell (402), the first grooves (408) and the second grooves (407) correspond to gaps of the spring (406), elastic pieces (409) are arranged in the first grooves (408) and the second grooves (407) in a clamping mode, and the elastic pieces (409) are arranged in the gaps of the spring (406) in a clamping mode.

3. The bend-resistant medium-high voltage cable according to claim 2, characterized in that: a through groove (405) is formed in the clamping block (404), the width of the through groove (405) is the same as the diameter of the spring (406), and the tail end of the spring (406) is clamped into the through groove (405).

4. A bend-resistant medium-high voltage cable according to claim 3, characterized in that: one end of the elastic piece (401) is connected with one end of the spring (406) through a connecting rod (403) and a fixture block (404), and the other end of the elastic piece (401) is connected with the other end of the spring (406) through the same connecting rod (403) and fixture block (404).

5. The bend-resistant medium-high voltage cable according to claim 4, characterized in that: the outer protective sleeve (5) is made of insulating rubber.