CN223502232U - An insulation structure for a power distribution cable joint - Google Patents

Abstract

The utility model relates to the technical field of cable connectors and provides a distribution cable connector insulating structure which comprises a cable main body and a copper conductor arranged in the cable main body, wherein an insulating layer is coated outside the copper conductor, one end of the copper conductor is provided with a wiring terminal, sealant is filled between the insulating layer and the wiring terminal, the wiring terminal comprises a connecting sleeve sleeved outside the copper conductor and a connector fixedly arranged at one end of the connecting sleeve, and the insulating layer and the connecting sleeve are sleeved with the insulating sleeve. According to the utility model, through the arrangement of the bonding assembly, the volume of the extruded cavity of the connecting sleeve is reduced, the contact area between the connecting sleeve and the copper conductor is increased, so that the resistance of the connecting terminal is reduced, the heat dissipation is reduced, the ageing condition of the insulating sleeve is relieved, and in addition, the contact end of the bonding block is arranged in an arc shape, so that the bonding block is more convenient to contact with the copper conductor, and the current flowing efficiency is further improved.

Description

Distribution cable joint insulation system

Technical Field

The utility model relates to the technical field of cable joints, in particular to an insulating structure of a distribution cable joint.

Background

In the electric energy transmission process, the cable connector is an important component on the cable, when the cable connector is manufactured, an insulating layer outside a copper conductor in the cable is required to be stripped, then a wiring terminal is sleeved on the insulating layer, meanwhile, in order to ensure the stability of connection between the wiring terminal and the copper conductor, the wiring terminal is extruded through hydraulic equipment to be deformed and clamped outside the copper conductor, so that the connection stability can be improved, but the connection end of the wiring terminal and the copper conductor is a cylinder, and after extrusion, the connection end can be folded towards the middle, so that gaps which are not attached with the copper conductor can be formed at the two ends of the connection end. When gaps exist between the wiring terminals and the copper conductors, a breakpoint or a gap is formed at the connection part, so that the current can be discontinuous when passing through the gaps, the current flow difficulty is increased, namely, the resistance is increased, the connection part is overheated, the ageing of an external insulating sleeve can be accelerated in the long-time working process, the insulating performance is reduced, and even the phenomenon of partial discharge can be generated. In view of this, we propose a distribution cable joint insulation structure.

Disclosure of utility model

The utility model aims to solve the defect that an insulating sleeve in the existing cable joint is easy to age in the use process, and provides an insulating structure of a distribution cable joint.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

The utility model provides a distribution cable joint insulation system, includes the cable main part to and set up the copper conductor in the cable main part inside, and the outside cladding of copper conductor has the insulating layer, copper conductor one end is equipped with binding post, and fills between insulating layer and the binding post has the sealant, binding post is including the cover establish at the outside adapter sleeve of copper conductor and the connector of fixed mounting in adapter sleeve one end, insulating layer and the outside cover of adapter sleeve are equipped with the adapter sleeve, the inside laminating subassembly that increases adapter sleeve and copper conductor laminating area that is equipped with of adapter sleeve;

The laminating subassembly is including extrusion adapter sleeve structure in the laminating chamber of copper conductor both sides, laminating intracavity portion fixed mounting has the laminating piece of compression laminating intracavity portion, laminating piece one end and copper conductor contact, and the contact end is equipped with circular-arc.

Preferably, the cable main body and the insulating layer are externally sleeved with a heat-shrinkable support sleeve, and one end of the heat-shrinkable support sleeve is connected with the insulating sleeve in a tower mode.

Preferably, the tower joint length of the heat-shrinkable support sleeve and the insulating sleeve is 20-30mm.

Preferably, the insulating sleeve is made of polyvinyl chloride.

Preferably, a plurality of heat dissipation grooves for accelerating heat dissipation of the attaching cavity are formed in the inner cavity of the connecting sleeve and at one end, close to the connector, of the connecting sleeve.

Preferably, the cross section of the radiating groove is in a herringbone shape.

Compared with the prior art, the utility model has the beneficial effects that:

1. According to the utility model, through the arrangement of the bonding assembly, the volume of the extruded cavity of the connecting sleeve is reduced, the contact area between the connecting sleeve and the copper conductor is increased, so that the resistance of the connecting terminal is reduced, the heat generation is reduced, the ageing condition of the insulating sleeve is relieved, and in addition, the contact end of the bonding block is arranged in an arc shape, so that the bonding block is more convenient to contact with the copper conductor, and the current flowing efficiency is further improved.

2. According to the utility model, through the arrangement of the heat dissipation grooves, the flow rate of heat at the junction terminal is quickened, the ageing rate of the insulating sleeve at the junction terminal is slowed down, the insulating performance of the insulating sleeve is ensured, in addition, the special arrangement of the cross section of the heat dissipation grooves prevents external impurities from entering the connecting sleeve, and the normal flow of current is ensured.

Drawings

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a top view cross-section of the present utility model;

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

FIG. 4 is a side cross-sectional view of the terminal of the present utility model;

FIG. 5 is an enlarged schematic view of the area B in FIG. 4;

fig. 6 is a front view of the terminal of the present utility model.

In the figure, 1, a cable main body, 2, a copper conductor, 3, an insulating layer, 4, a wiring terminal, 41, a connector, 42, a connecting sleeve, 5, an insulating sleeve, 6, a bonding assembly, 61, a bonding cavity, 62, a bonding block, 7, a heat dissipation groove and 8, a heat shrinkage support sleeve.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the process of electric energy transmission, the insulation sleeve 5 outside the cable connector is often affected by factors such as temperature, electric field and the like to gradually generate insulation aging, so that the insulation performance is reduced, even partial discharge is generated, and incomplete statistical analysis proves that the main reason of cable failure is that the connector of the electric wire is problematic. In the manufacturing process of the cable joint, the wiring terminal 4 is not easy to be completely attached to the copper conductor 2, a certain gap is reserved, and the air can influence the flow of current, so that the resistance of the wiring terminal 4 is increased, the temperature of the wiring terminal is higher, and the aging degree of the insulating sleeve 5 is accelerated. To solve the above problems, we propose the following.

Example 1

The insulation sleeve 5 in the existing cable joint is easy to age in the use process, refer to fig. 1-6, this embodiment provides a distribution cable joint insulation structure, the resistance of binding post 4 department has been reduced, the thermal production has been reduced, the condition that insulation sleeve 5 is ageing has been alleviated, mainly by cable main part 1 and set up the copper conductor 2 in cable main part 1, and copper conductor 2 outside cladding has insulating layer 3, copper conductor 2 one end is equipped with binding post 4, and fill between insulating layer 3 and binding post 4 and have the sealant, binding post 4 is including the cover establish at copper conductor 2 outside's junction sleeve 42 and fixed mounting at junction sleeve 42 one end connector 41, insulating layer 3 and junction sleeve 42 outside cover are equipped with insulation sleeve 5, junction sleeve 42 inside is equipped with the laminating subassembly 6 that increases junction sleeve 42 and copper conductor 2 laminating area, cable joint need peel off copper conductor 2 from cable main part 1 earlier in the preparation, then strip the insulating layer 3 on the copper conductor 2 through the instrument, set up the junction sleeve 42 on the top again, finally, make it and copper conductor 2 come off through instrument extrusion joint sleeve, make it and 2 and the connector 4 and the connector 41 of fixed mounting at junction sleeve 42 one end, the junction sleeve 2 has been reduced the probability of giving off with copper conductor 2 and the copper conductor 2 laminating area, the sealing sleeve 2 is closely carried out, the sealing effect has been avoided the sealing sleeve 2 and the thermal insulation sleeve 2 is closely carried out, the sealing effect is guaranteed and the insulation sleeve 2 is closely to the cost of the copper conductor 2 and the copper conductor 2 has been closely and the copper conductor 2.

In the manufacturing process of the cable connector, in order to ensure the stability of connection between the wiring terminal 4 and the copper conductor 2, the wiring terminal 4 is extruded through hydraulic equipment, so that the wiring terminal is deformed and clamped outside the copper conductor 2, and the connection stability can be improved, but the gap between the wiring terminal 4 and the copper conductor 2 is increased, so that the current flow difficulty is increased, the resistance of the wiring terminal 4 is improved, a large amount of heat is generated at the wiring terminal easily, the aging of the insulating sleeve 5 is accelerated, and the insulating performance is damaged. Therefore, the contact area between the connecting sleeve 42 and the copper conductor 2 is increased, the resistance is reduced, and the aging condition of the insulating sleeve 5 is relieved by the arrangement of the attaching assembly 6. The specific implementation mode is as follows:

The laminating subassembly 6 includes extrusion adapter sleeve 42 structure in the laminating chamber 61 of copper conductor 2 both sides, laminating chamber 61 inside fixed mounting has the laminating piece 62 of compression laminating chamber 61 inner space, laminating piece 62 one end and copper conductor 2 contact, and the contact end is equipped with circular-arc, when the adapter sleeve 42 of extrusion cover on copper conductor 2 is established, adapter sleeve 42 is difficult to shrink inwards after receiving the extrusion owing to being the metal material, instead can outwards extend, make its edge change into the platykurtic, and do not contact with copper conductor 2, be provided with laminating piece 62 in laminating chamber 61 in this embodiment, make it receive the extrusion after, can draw close to the centre, and contact with copper conductor 2, increase the area of contact of binding post 4 and copper conductor 2, the effective area of improving the electric current flow, the resistance of binding post 4 has been reduced, the heat production of slowing down, the life of insulating sleeve 5 has been improved, in addition, laminating piece 62 contact end circular-arc sets up, make it more be convenient for with copper conductor 2 contact, the efficiency of current flow has been further improved.

The cable main body 1 and the insulating layer 3 are externally sleeved with the thermal shrinkage support sleeve 8, one end of the thermal shrinkage support sleeve 8 is connected with the insulating sleeve 5 in a tower mode, the thermal shrinkage support sleeve 8 is arranged, movement of each copper conductor 2 is limited, the problem caused by loosening of a circuit is solved, and stability and reliability of a cable connection position are guaranteed.

The length of the tower joint of the heat shrinkage support sleeve 8 and the insulating sleeve 5 is 20mm, and the tower joint between the heat shrinkage support sleeve 8 and the insulating sleeve 5 forms good electrical isolation, and the arrangement of the length of the tower joint of 20mm is convenient for the operation of staff, achieves the due isolation effect and simultaneously achieves the effect of saving materials.

The insulating sleeve 5 is made of polyvinyl chloride, and the polyvinyl chloride has good electrical insulation performance and chemical corrosion resistance, and can achieve good electrical isolation effect through the insulating sleeve 5 made of the polyvinyl chloride.

Example two

On the basis of the first embodiment, the technical solution proposed in the first embodiment is to solve the disadvantage that the insulation sleeve 5 in the existing cable joint is easy to age during use, however, although the contact area between the copper conductor 2 and the connection sleeve 42 can be increased to the greatest extent by the arrangement of the bonding assembly 6, the copper conductor 2 and the connection sleeve 42 are not completely bonded, so that a part of assembly gaps exist, and the gaps can cause the resistance at the connection terminal 4 to be higher than at other positions, so that the generated heat is also higher than at other positions.

Referring to fig. 1-6, a plurality of heat dissipation grooves 7 for accelerating heat dissipation of the attaching cavity 61 are formed in the inner cavity of the connecting sleeve 42 and near one end of the connecting head 41, so as to reduce heat at the connecting terminal 4 and slow down the aging rate of the insulating sleeve 5, in this embodiment, the heat dissipation rate at the connecting sleeve can be accelerated through the heat dissipation grooves 7 formed in the inner cavity of the connecting sleeve 42, and the insulating performance of the insulating sleeve 5 is ensured.

The cross section of the heat dissipation groove 7 is in a herringbone shape, as shown in fig. 5, the cross section of the heat dissipation groove 7 is in a herringbone shape rotating ninety degrees, the special arrangement increases the difficulty that external dust enters the inside of the connecting sleeve 42, and even if the dust enters the heat dissipation groove 7 from the upper part, the dust falls into the outlet of the lower part of the heat dissipation groove 7 under the action of gravity and waits for being blown out by heat flow, because the dust has the moisture absorption performance and is gathered on the copper conductor 2 in a large amount, the current flow can be influenced, and the special arrangement of the heat dissipation groove 7 in the embodiment ensures the normal current flow.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. An insulation structure for a power distribution cable joint, comprising a cable body (1) and a copper conductor (2) disposed inside the cable body (1), wherein the copper conductor (2) is covered with an insulation layer (3), one end of the copper conductor (2) is provided with a terminal (4), and a sealant is filled between the insulation layer (3) and the terminal (4), characterized in that: the terminal (4) comprises a connecting sleeve (42) sleeved outside the copper conductor (2) and a connector (41) fixedly installed at one end of the connecting sleeve (42), an insulating sleeve (5) is sleeved outside the insulation layer (3) and the connecting sleeve (42), and a bonding component (6) is provided inside the connecting sleeve (42) to increase the contact area between the connecting sleeve (42) and the copper conductor (2); The bonding assembly (6) includes bonding cavities (61) formed by extrusion connecting sleeves (42) on both sides of the copper conductor (2). A bonding block (62) is fixedly installed inside the bonding cavity (61) to compress the internal space of the bonding cavity (61). One end of the bonding block (62) is in contact with the copper conductor (2), and the contact end is provided with an arc shape. 2. The insulation structure of a power distribution cable joint according to claim 1, characterized in that: a heat shrinkable sleeve (8) is provided on the outside of the cable body (1) and the insulation layer (3), and one end of the heat shrinkable sleeve (8) is connected to the insulating sleeve (5). 3. The insulation structure of a power distribution cable joint according to claim 2, characterized in that: the overlap length of the heat shrink sleeve (8) and the insulating sleeve (5) is 20-30mm. 4. The insulation structure of a power distribution cable joint according to claim 1, characterized in that: the insulating sleeve (5) is made of polyvinyl chloride. 5. The insulation structure of a power distribution cable joint according to claim 1, characterized in that: a plurality of heat dissipation grooves (7) are provided in the inner cavity of the connecting sleeve (42) and at one end near the connector (41) to accelerate the heat dissipation of the fitting cavity (61). 6. The insulation structure of a power distribution cable joint according to claim 5, characterized in that: the heat dissipation groove (7) has a cross-section in the shape of a "人" (human).