Miniaturized 10kV separable connector

Abstract

The utility model discloses a miniaturized 10kV separable connector comprising a connector main body which is composed of an inner shielding layer, an insulating layer and an outer shielding layer. Through the optimized design of the shielding layer in the separable connector and the stress cone inner shielding layer, the electric field is uniform, the insulation thickness of the separable connector is reduced, the inner shielding layer, the insulation layer and the outer shielding layer adopt a three-layer injection molding process, the outer shielding layer and the insulation layer are tightly attached and are not easy to fall off, the resistance value is low, the shielding effect is good, and the service life of the separable connector is prolonged. And the structure is optimized and miniaturized, the overall weight of the product can be reduced, the withstand voltage level can reach 50kv, and the connector main body is made of ethylene propylene diene monomer rubber, so that the cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the relevant field of detachable connectors, in particular to a miniaturized 10kV detachable connector. Background Art

[0002] With the growing demand for electricity, separable connectors are increasingly widely used in power distribution systems as essential power cable accessories to connect cables to switchgear such as gas-insulated switchgear, ring main unit, and cable branch box. The 10kV separable connectors currently widely used in China generally use polymer silicone rubber, with a prefabricated internal shielding layer, an injection insulation layer, and a spray-coated outer shielding layer, forming a three-layer composite.

[0003] Most of the existing 10kV detachable connectors are made of silicone rubber, which has a relatively high price and is manufactured through a three-layer composite process, so that the insulation thickness of the detachable connector is relatively high, making the product itself heavy. Utility Model Content

[0004] Therefore, in order to solve the above-mentioned shortcomings, the utility model provides a miniaturized 10kV detachable connector.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a miniaturized kV detachable connector, comprising a connector body, a seal, a stress cone and a protrusion, the connector body is composed of an inner shielding layer, an insulating layer and an outer shielding layer, the inner shielding layer is wrapped with an insulating layer on the outside, the insulating layer is wrapped with an outer shielding layer on the outside, the lower end of the inner shielding layer is cylindrical, and the interior is hollow to form a first insertion cavity, the upper end of the inner shielding layer is transversely provided with a circular docking cavity, and the first insertion cavity is connected to the docking cavity, the left and right sides of the upper end of the insulating layer are hollow to form an installation cavity, and the installation cavities on the left and right sides are connected to the docking cavity at the upper end of the inner shielding layer, the lower end of the insulating layer is hollow to form a second insertion cavity, and the first insertion cavity at the lower end of the inner shielding layer is connected to the second insertion cavity at the lower end of the insulating layer, the inner walls of the first insertion cavity and the second insertion cavity are flush, the seal is sleeved on the outer shielding layer on the right side of the connector body, the stress cone is inserted into the second insertion cavity at the lower end of the insulating layer, and the protrusion is arranged on the outer shielding layer at the middle end of the connector body.

[0006] Preferably, the lower end of the connector body is in a truncated cone shape, and the surface of the outer shielding layer at the lower end of the connector body is polished and smooth, while the surfaces of the outer shielding layer at the middle end and the upper end of the connector body are frosted.

[0007] Preferably, the inner shielding layer, the insulating layer and the outer shielding layer are all made of EPDM rubber.

[0008] Preferably, a through hole is provided at the middle end of the stress cone, and a shielding layer is provided on the inner wall of the stress cone.

[0009] Preferably, the sealing member is cylindrical, with an opening at the left end and two circles of convex strips arranged inside.

[0010] Beneficial effects of the utility model:

[0011] The utility model optimizes the design of the shielding layer and the stress cone inner shielding layer in the detachable connector to make the electric field uniform and reduce the insulation thickness of the detachable connector. The inner shielding layer, the insulating layer and the outer shielding layer are three-layer injection molding process. The outer shielding fits tightly to the insulating layer and is not easy to fall off. The resistance value is low and the shielding effect is good. The structure is optimized and miniaturized, which can reduce the overall weight of the product. The voltage resistance level can reach 50kv. The connector body is produced by EPDM rubber, which greatly reduces the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the main structure of the connector of the utility model;

[0014] Figure 3 This is a schematic diagram of the side view of the connector body of the utility model;

[0015] Figure 4 This is a schematic diagram of the internal structure of the connector body of the utility model;

[0016] Figure 5 This is a schematic diagram of the seal structure of the utility model;

[0017] Figure 6 It is a schematic diagram of the stress cone structure of the utility model.

[0018] Among them: connector body-1, seal-2, stress cone-3, bump-4, inner shielding layer-101, insulation layer-102, outer shielding layer-103. DETAILED DESCRIPTION

[0019] In order to further explain the technical solution of the present utility model, it is described in detail through specific embodiments below.

[0020] See also Figure 1-6The utility model provides a miniaturized 10kV detachable connector, including a connector body 1, a sealing member 2, a stress cone 3 and a protrusion 4. The connector body 1 is composed of an inner shielding layer 101, an insulating layer 102 and an outer shielding layer 103. The outer side of the inner shielding layer 101 is integrally formed with the insulating layer 102, and the outer side of the insulating layer 102 is integrally formed with the outer shielding layer 103. The inner shielding layer 101, the insulating layer 102 and the outer shielding layer 103 are formed by a three-layer injection molding process, specifically, the inner and outer shielding layers are first made, and then the insulating layer is injected with glue. Compared with the prior art, the thickness of the insulating layer 102 is reduced by 3mm, making the product lighter. The outer shielding 103 is tightly fitted with the insulating layer 102, is not easy to fall off, has a low resistance value and a good shielding effect. The materials of the inner shielding layer 101, the insulating layer 102 and the outer shielding layer 103 are all EPDM rubber, which has excellent electrical insulation, weather resistance and corrosion resistance. The price of EPDM rubber is lower than that of silicone rubber, and the price fluctuation is small. The lower end of the inner shielding layer 101 is cylindrical, and the interior is hollow to form a first insertion cavity. A circular docking cavity is transversely opened at the upper end of the inner shielding layer 101, and the first insertion cavity is connected to the docking cavity. The left and right sides of the upper end of the insulating layer 102 are hollow to form installation cavities, and the installation cavities on the left and right sides are connected to the docking cavity at the upper end of the inner shielding layer 101. The lower end of the insulating layer 102 is hollow to form a second insertion cavity, and the first insertion cavity at the lower end of the inner shielding layer 101 is connected to the second insertion cavity at the lower end of the insulating layer 102. The inner walls of the first insertion cavity and the second insertion cavity are flush, which is convenient for cable insertion. The sealing member 2 is sleeved on the outer shielding layer 103 on the right side of the connector body 1, and the stress cone 3 is inserted into the second insertion cavity at the lower end of the insulating layer 102. The bump 4 is integrally formed on the outer shielding layer 103 at the middle end of the connector body 1.

[0021] Among them, the lower end of the connector body 1 is in a truncated cone shape, and the surface of the outer shielding layer 103 at the lower end of the connector body 1 is polished and smooth, while the surface of the outer shielding layer 103 at the middle and upper ends of the connector body 1 is frosted, which is convenient for staff to grasp.

[0022] A through hole is opened at the middle end of the stress cone 3 , and a shielding layer is provided on the inner wall of the stress cone 3 , so that the inner shielding layer 101 , the outer shielding layer 103 and the shielding layer inside the stress cone 3 can cooperate with each other.

[0023] The sealing member 2 is cylindrical in shape, with an opening at the left end and two circles of convex strips integrally formed inside, so as to facilitate sealing of the right installation cavity on the insulating layer 102 .

[0024] Here’s how it works:

[0025] First, the stress cone 3 is sleeved on the cable, and then the end of the cable is inserted into the first insertion cavity at the lower end of the inner shielding layer 101. At this time, the stress cone 3 is inserted into the second insertion cavity at the lower end of the insulating layer 102 to fill the gap between the cable and the second insertion cavity. The terminal at the end of the cable enters the docking cavity at the upper end of the inner shielding layer 101. Then the staff can insert the insulating plug into the right installation cavity at the upper end of the insulating layer 102, and then sleeve the seal 2 on the outer shielding layer 103 on the right side of the connector body 1, which can improve the insulation effect of the connector body 1 and ensure the reliability of the connection between the cable and the switch device. Finally, the staff can insert the docking end of the switch device into the left installation cavity at the upper end of the insulating layer 102, and connect the docking end of the switch device with the terminal of the cable. A hanging hole is provided on the protrusion 4 to facilitate the placement of the detachable connector.

[0026] It can be understood that the insulating plug is a conventional structure well known to those skilled in the art and will not be described in detail here.

[0027] The above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A miniaturized 10kV separable connector, characterized in that: The invention comprises a connector body (1), wherein the connector body (1) is composed of an inner shielding layer (101), an insulating layer (102), and an outer shielding layer (103); the inner shielding layer (101) is wrapped with an insulating layer (102) on the outside, and the insulating layer (102) is wrapped with an outer shielding layer (103) on the outside.

2. According to claim 1, a miniaturized 10kV separable connector, characterized in that: The lower end of the inner shielding layer (101) is cylindrical and hollow inside to form a first insertion cavity. A circular docking cavity is transversely opened at the upper end of the inner shielding layer (101), and the first insertion cavity is communicated with the docking cavity.

3. According to claim 2, a miniaturized 10kV separable connector, characterized in that: The upper end of the insulating layer (102) is hollow on both sides to form installation cavities, and the installation cavities on both sides are connected to the docking cavity at the upper end of the inner shielding layer (101); the lower end of the insulating layer (102) is hollow on the inside to form a second insertion cavity, and the first insertion cavity at the lower end of the inner shielding layer (101) is connected to the second insertion cavity at the lower end of the insulating layer (102), and the inner walls of the first insertion cavity and the second insertion cavity are flush.

4. According to claim 3, a miniaturized 10kV separable connector is characterized in that: It also includes a sealing member (2), a stress cone (3) and a protrusion (4), wherein the sealing member (2) is sleeved on the outer shielding layer (103) on the right side of the connector body (1), the stress cone (3) is inserted into a second insertion cavity at the lower end of the insulating layer (102), and the protrusion (4) is arranged on the outer shielding layer (103) at the middle end of the connector body (1).

5. According to claim 1, a miniaturized 10kV separable connector, characterized in that: The lower end of the connector body (1) is in the shape of a truncated cone, and the surface of the outer shielding layer (103) at the lower end of the connector body (1) is polished and smooth, while the surfaces of the outer shielding layer (103) at the middle and upper ends of the connector body (1) are frosted.

6. A miniaturized 10kV separable connector according to claim 1, characterized in that: The inner shielding layer (101), the insulating layer (102), and the outer shielding layer (103) are all made of EPDM rubber.

7. A miniaturized 10kV separable connector according to claim 4, characterized in that: A through hole is provided at the middle end of the stress cone (3), and a shielding layer is provided on the inner wall of the stress cone (3).

8. A miniaturized 10kV separable connector according to claim 4, characterized in that: The sealing member (2) is cylindrical, with an opening at the left end and two circles of convex strips arranged inside.

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