CN210640378U

CN210640378U - Outer cone type stress evacuation type bus connector

Info

Publication number: CN210640378U
Application number: CN201921652096.4U
Authority: CN
Inventors: 周平江; 齐晓武
Original assignee: Shenzhen Chuangyin Technology Co ltd
Current assignee: Shenzhen Chuangyin Technology Co ltd
Priority date: 2019-09-29
Filing date: 2019-09-29
Publication date: 2020-05-29
Anticipated expiration: 2029-09-29

Abstract

The utility model belongs to the technical field of electrical connection, especially, relate to an sparse type bus connector of outer cone type stress, mainly used high-voltage switch in the high-voltage bus connected system is connected with the high-voltage switch top, bus connector mainly by insulating overcoat with inlay the conductive copper cover in insulating overcoat and constitute, insulating overcoat includes insulating layer and the outer shielding layer of insulating layer, and bus connector is at the internal insulation layer that inserts bus port department and is the toper structure, and the external shielding layer of this toper structure insulating layer department is rather than assorted loudspeaker column structure, calls external stress cone, can shield external electric field interference on the one hand, makes product surface electric field zero; on the other hand, the concentrated electric field at the bus fracture can be evacuated through the geometric shape of the outer cone, and the structure is simple and the production cost is low.

Description

Outer cone type stress evacuation type bus connector

Technical Field

The utility model belongs to the technical field of electrical connection, especially, relate to an outer cone type stress evacuation type bus connector, be connected between high tension switchgear and the high tension switchgear top among the mainly used high tension switchgear connected system.

Background

The bus connector mainly comprises an insulating outer sleeve and a conductive copper sleeve, wherein the conductive copper sleeve is embedded in the insulating outer sleeve, and an insulating layer is required to be added on the surface of the insulating outer sleeve because the surface of the conductive copper sleeve is not smooth and a gap is easily formed between the conductive copper sleeve and the insulating layer to cause electric field concentration; the bus mainly comprises a conductive wire core, an insulating layer and a shielding layer which are sequentially coated outside the conductive wire core, when a bus head is made, the outermost shielding layer needs to be stripped, the original electric field distribution of the bus is changed, a tangential electric field which is very unfavorable for insulation is generated, and the bus head where the shielding layer is stripped is concentrated, so that the port is the most easily punctured part.

At present, a high-voltage top bus connector adopts two modes for processing a concentrated electric field at a bus fracture. One method is to adopt a parametric method, and use a stress tube with high dielectric constant to evacuate the concentrated electric field at the bus break, as shown in the accompanying drawings 1 and 2 of the specification, and penetrate the stress tube 3 at the bus head where the shielding layer 1 is stripped, and then insert the conductive wire core 7 of the bus 10 into the conductive copper sleeve 6 of the bus connector, so that the stress tube 3 contacts with the internal insulating layer 2 of the bus connector, but this method has the following disadvantages:

1. the product cost is increased, and a set of die for producing the stress tube needs to be separately opened;

2. since the stress tube is a high dielectric constant material, in addition to the shielding layer being effectively grounded outside the bus connector, the shielding layer section of the bus needs to be added with a grounding wire assembly to ensure effective grounding, which obviously increases the cost of the product.

Another way is to prefabricate an internal stress cone 4 at the bus bar connector to disperse the fracture concentrated stress at the bus bar head, as shown in the specification of fig. 3 and the specification of fig. 4, prefabricate the internal stress cone 4 at the bus bar connector port, and insert the conductive wire core 7 of the bus bar 10 into the conductive copper sleeve 6 of the bus bar connector, so that the internal stress cone 4 is in contact with the bus bar external shielding layer 1, but this way has the following disadvantages:

1. a set of die for producing the stress cone needs to be independently opened, so that the product cost is increased;

2. because there is a section of insulating layer between the external shielding layer of the bus connector and the internal stress cone, if effective grounding of the bus needs to be ensured, the following solutions are required: A. spraying a layer of conductive ink 11 between the internal stress cone and the shielding layer to integrate the shielding layer and the internal stress cone into a whole, and grounding through the shielding layer; B. a grounding component is added on the bus to ensure the connection with the ground.

In which the t-head bus bar connector 8 and the cross-head bus bar connector 9 are taken as examples in the drawings.

It can be seen that the above two methods both increase the difficulty of production, resulting in increased production cost.

SUMMERY OF THE UTILITY MODEL

To prior art's not enough, this utility model provides an sparse type bus connector of outer cone formula stress lets the shielding layer of bus connector port department make the shape of an outer cone, and simple structure makes the degree of difficulty low to can come the odd electric field that becomes of sparse bus-bar head fracture department.

In order to realize above-mentioned purpose, this utility model provides an sparse type bus connector of outer cone type stress, wherein bus connector mainly comprises insulating overcoat and the conductive copper sheathing that inlays in insulating overcoat, insulating overcoat includes the shielding layer outside insulating layer and the insulating layer to bus connector is the toper structure at the internal insulation layer that inserts bus bar port department, and the outside shielding layer of this toper structure insulating layer department is rather than assorted horn-shaped structure, and wherein the internal diameter that conductive copper sheathing was kept away from to the shielding layer of this horn-shaped structure is less than its internal diameter that is close to from conductive copper sheathing.

As the utility model relates to a further improvement of sparse type bus connector of outer cone type stress: the shielding layer of the horn-shaped structure is provided with a through hole for connecting a grounding wire.

As the utility model relates to a further improvement of sparse type bus connector of outer cone type stress: the bus connector is a T-head bus connector.

As the utility model relates to a further improvement of sparse type bus connector of outer cone type stress: the bus connector is a crosshead bus connector.

The utility model discloses a push rod is adjustable device's beneficial effect: the external shielding layer of the bus connector at the port of the inserted bus is made into a horn-shaped external cone structure, so that on one hand, the external electric field interference can be shielded, and the electric field on the surface of a product is zero; on the other hand, the concentrated electric field at the bus break can be evacuated through the geometric shape of the outer cone. Compared with the prior art that the concentrated electric field at the bus fracture is evacuated by using the stress tube with high dielectric constant, the additional arrangement of a grounding wire component is not needed; compare and come the fracture concentrated stress of sparse bus head department at the prefabricated inside stress cone of bus connector, need not additionally increase the ground connection subassembly or spray the electrically conductive printing ink of one deck between inside stress cone and shielding layer, the structure is simpler, and manufacturing cost is lower.

Drawings

FIG. 1 is a schematic structural diagram of a concentrated electric field at a bus break using a stress tube evacuation in the prior art;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a schematic structural diagram of a concentrated electric field at a bus break using an internal stress cone to evacuate a bus in the prior art;

FIG. 4 is an exploded view of FIG. 3;

FIG. 5 is a schematic structural view of the concentrated electric field at the bus break by external stress cone evacuation according to the present invention;

FIG. 6 is an exploded view of FIG. 5;

in the figure: 1. shielding layer, 2, insulating layer, 3, stress tube, 4, internal stress awl, 5, external stress awl, 6, electrically conductive copper sheathing, 7, electrically conductive sinle silk, 8, T-head bus connector, 9, cross head bus connector, 10, generating line, 11, electrically conductive printing ink.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

The utility model provides an outer cone type stress evacuation type bus connector, wherein the bus connector mainly comprises an insulating outer sleeve and a conductive copper sleeve 6 embedded in the insulating outer sleeve, and the insulating outer sleeve comprises an insulating layer 2 and a shielding layer 1 outside the insulating layer 2; the bus 10 comprises a conductive wire core 7, and an insulating layer 2 and a shielding layer 1 which are sequentially coated outside the conductive wire core 7, and when a bus head is made, the external shielding layers 1 at two ends of the bus 10 need to be stripped.

Specifically, the internal insulation layer 2 of the bus connector at the port of the inserted bus 10 is in a conical structure, the external shielding layer 1 at the position of the conical structure insulation layer 2 is in a horn-shaped structure matched with the conical structure, the inner diameter of the shielding layer 1 of the horn-shaped structure far away from the conductive copper sleeve 6 is smaller than the inner diameter of the shielding layer 1 of the horn-shaped structure close to the conductive copper sleeve 6, the shielding layer 1 of the horn-shaped structure is called as an external stress cone 4, and in addition, a through hole connected with a ground wire is formed in the external stress cone 4.

In use, the conductive core 7 of the busbar 10 is inserted into the conductive copper sheath 6 of the busbar connector such that the external stress cone 4 of the busbar connector contacts the external shield 1 of the busbar 10 and the external stress cone 4 is grounded. The external stress cone 4 can shield external electric field interference on one hand, so that the surface electric field of the bus connector is zero; on the other hand, the concentrated electric field at the bus break can be evacuated through the geometric shape of the outer cone. Compared with the prior art that the concentrated electric field at the bus fracture is evacuated by using the stress tube with high dielectric constant, the additional arrangement of a grounding wire component is not needed; compare and come the fracture concentrated stress of sparse bus head department at the prefabricated inside stress cone of bus connector, need not additionally increase the ground connection subassembly or spray one deck conductive ink 11 between inside stress cone and shielding layer, the structure is simpler, and manufacturing cost is lower.

Including a t-head bus connector 8 and a cross-head bus connector 9.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the preferred embodiments, it is not limited to the present invention, and any skilled person in the art can make some modifications or equivalent changes without departing from the technical scope of the present invention.

Claims

1. The utility model provides an sparse type bus connector of outer cone formula stress, wherein bus connector mainly comprises insulating overcoat and the electrically conductive copper sheathing of inlaying in insulating overcoat, its characterized in that: insulating overcoat includes the shielding layer outside insulating layer and the insulating layer to the internal insulation layer of bus connector at inserting bus port department is the toper structure, and the outside shielding layer of this toper structure insulating layer department is rather than assorted horn structure, and wherein the internal diameter that electrically conductive copper sheathing was kept away from to the shielding layer of this horn structure is less than its internal diameter that is close to from electrically conductive copper sheathing.

2. The externally tapered stress evacuation bus connector of claim 1, wherein: the shielding layer of the horn-shaped structure is provided with a through hole for connecting a grounding wire.

3. The externally tapered stress evacuation bus connector of claim 1, wherein: the bus connector is a T-head bus connector.

4. The externally tapered stress evacuation bus connector of claim 1, wherein: the bus connector is a crosshead bus connector.