10KV power cable cold shrinkage indoor terminal

Abstract

The utility model discloses a 10KV power cable cold shrink indoor terminal, which comprises a main body, an umbrella skirt part, a sealing part and a stress cone, the main body is hollow, the stress cone is arranged in the lower part of the main body, and the initial part of the upper end of the stress cone is arranged in a horn mouth shape. An identification mark is arranged on the outer surface of the main body corresponding to the starting part of the upper end of the stress cone; the umbrella skirt part is arranged at the lower part of the sealing part on the main body and comprises a first umbrella skirt, a second umbrella skirt and a third umbrella skirt which are sequentially arranged along the main body, and the diameters of the first umbrella skirt, the second umbrella skirt and the third umbrella skirt are equal. The distances between the three umbrella skirts of the umbrella skirt part are equal and large, so that breakdown or electric leakage cannot be caused when high voltage is encountered; an identification mark is arranged on the outer surface of the main body corresponding to the starting part of the upper end of the stress cone, the installation is convenient, and the situation that the fracture of a cable semi-conductive layer exceeds the starting part of the horn mouth of the stress cone is avoided; the dustproof and waterproof performance is good.

Description

Technical Field

[0001] The utility model relates to the technical field of indoor terminals, in particular to a 10KV power cable cold shrink indoor terminal. Background Art

[0002] Cold shrink cable terminals are made of elastomeric materials (commonly used are silicone rubber and EPDM rubber) that are injection vulcanized in the factory, and then expanded and lined with plastic spiral supports to form various cable accessories. Traditional cold shrink cable terminals have the following problems:

[0003] 1. It is easy to accumulate dust and water, and the dust and water resistance of indoor terminals cannot be guaranteed;

[0004] 2. The number of sheds is relatively small. In order to save costs, many manufacturers only set 1-2 outdoor sheds and the distance between sheds is small, resulting in a small creepage distance. If the creepage distance is not enough, high voltage will cause breakdown or leakage;

[0005] 3. The straight section of the stress cone is not long enough, which requires extreme care when installing the indoor terminal. The installation is inconvenient and it is very easy for the break of the cable's semi-conductive layer to exceed the starting part of the stress cone's horn. Utility Model Content

[0006] In order to solve the above technical problems, the utility model designs a 10KV power cable cold shrink indoor terminal.

[0007] The utility model adopts the following technical solutions:

[0008] A 10KV power cable cold shrink indoor terminal comprises a main body, an umbrella skirt, a sealing part and a stress cone. The main body is hollow inside, the stress cone is arranged in the lower part of the main body, the starting part of the upper end of the stress cone is arranged in a trumpet shape, an identification mark is arranged on the outer surface of the main body corresponding to the position of the starting part of the upper end of the stress cone, and the sealing part is arranged on the upper part of the main body; the umbrella skirt is arranged below the sealing part on the main body, and the umbrella skirt comprises a first umbrella skirt, a second umbrella skirt and a third umbrella skirt arranged in sequence along the main body, and the diameters of the first umbrella skirt, the second umbrella skirt and the third umbrella skirt are equal. The starting part of the upper end of the stress cone is arranged in a trumpet shape, the purpose is to better diffuse the electric field there, so that energy is not easy to accumulate and it is not easy to break through the product.

[0009] Preferably, the first umbrella skirt, the second umbrella skirt and the third umbrella skirt are spaced at equal intervals, and the upper surfaces of the umbrella skirts are inclined, and the angle between the upper surfaces of the umbrella skirts and the horizontal direction is 15 degrees, so as to better guide the rainwater out.

[0010] Preferably, the sealing portion is composed of three annular ring structures, and the width of the upper annular ring is greater than that of the two lower annular rings, in order to ensure the strength and sealing of the upper covering.

[0011] Preferably, the total length of the main body is not less than 200 mm. The purpose is to better ensure the complete covering of the cable core. The length of the stress cone is not less than 45 mm, and the distance between the throat of the stress cone horn and the uppermost part of the main body is not less than 140 mm. The inner diameter ranges from 6 to 50 mm, and the diameters of the first shed, the second shed and the third shed are between 20 and 90 mm.

[0012] Preferably, the wall thickness of the inner tube wall of the main body is not less than 2 mm, so as to better withstand higher voltage.

[0013] Preferably, the wall thickness t between the outer end of the stress cone bell mouth where the stress cone is placed on the main body and the outer side of the main body is not less than 3.5 mm. The design of increasing the wall thickness is adopted to ensure strength.

[0014] Preferably, the outer surface of the main body is treated with a mirror finish, so as to prevent stains and rain from staining the outer surface and achieve a better anti-fouling and waterproof effect.

[0015] Preferably, the inner diameter surface of the main body is mirror-finished, so that the resistance when the cable core passes through is smaller, it is more labor-saving and convenient, and the main body and the cable core fit more tightly when wrapped, and the sealing is better.

[0016] Preferably, the surface of the stress cone is also treated with mirror finish, so as to facilitate the adhesion between the stress cone and the insulating layer.

[0017] Preferably, the upper inclined section and the maximum diameter section of the main body are processed with a smooth transition, so as to better guide the rainwater and discharge the rainwater.

[0018] Preferably, the Shore hardness of the main body is ≤55A. The purpose is to better expand and wrap. Product material design parameters: tensile strength ≥5.5N / mm^2, elongation at break ≥450%, tear strength ≥20N / mm, tensile permanent deformation ≤5%, relative dielectric constant (50Hz) 2.8-3.5, anti-leakage tracking ≥1A3.5, short-term power frequency breakdown electric field strength ≥20kV / mm, volume resistivity ≥1.0×10^15Ω.cm, loss factor (50Hz) ≤0.004.

[0019] The beneficial effects of the utility model are as follows: (1) the umbrella skirt part of the utility model comprises a first umbrella skirt, a second umbrella skirt and a third umbrella skirt which are arranged in sequence along the main body, and the three umbrella skirts are spaced at equal and large intervals, and will not cause breakdown or leakage when encountering high voltage; (2) an identification mark is arranged on the outer surface of the main body corresponding to the starting part of the upper end of the stress cone, which is easy to install and will not cause the break of the cable semi-conductive layer to exceed the starting part of the stress cone horn; (3) the dustproof and waterproof performance is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model;

[0021] Figure 2 It is a cross-sectional view of the utility model;

[0022] In the figure: 1. main body, 2. umbrella skirt part, 3. sealing part, 4. stress cone, 5. identification mark, 21. first umbrella skirt, 22. second umbrella skirt, 23. third umbrella skirt. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0024] Example: Figure 1 and Figure 2 As shown, a 10KV power cable cold shrink indoor terminal includes a main body 1, an umbrella skirt 2, a sealing part 3 and a stress cone 4. The main body is hollow inside, the stress cone is arranged in the lower part of the main body, the starting part of the upper end of the stress cone is arranged in a trumpet shape, an identification mark 5 is arranged on the outer surface of the main body corresponding to the position of the starting part of the upper end of the stress cone, and the sealing part is arranged on the upper part of the main body; the umbrella skirt is arranged at the lower part of the sealing part on the main body, and the umbrella skirt includes a first umbrella skirt 21, a second umbrella skirt 22 and a third umbrella skirt 23 arranged in sequence along the main body, and the diameters of the first umbrella skirt, the second umbrella skirt and the third umbrella skirt are equal. The starting part of the upper end of the stress cone is arranged in a trumpet shape, the purpose is to better diffuse the electric field there, so that energy is not easy to accumulate and it is not easy to break through the product.

[0025] The first umbrella skirt, the second umbrella skirt and the third umbrella skirt are spaced at equal intervals, and the upper surface of the umbrella skirt is inclined, and the angle between the upper surface of the umbrella skirt and the horizontal direction is 15 degrees, so as to better guide the rainwater out.

[0026] The sealing part is composed of three annular ring structures, and the width of the upper annular ring is greater than the two lower annular rings, in order to ensure the strength and sealing of the upper covering.

[0027] The total length of the main body is not less than 200mm. The purpose is to better ensure the complete covering of the cable core. The length of the stress cone is not less than 45mm, and the distance between the throat of the stress cone horn and the uppermost part of the main body is not less than 140mm. The inner diameter ranges from 6 to 50mm, and the diameters of the first shed, the second shed and the third shed are between 20 and 90mm.

[0028] The wall thickness of the inner tube wall of the main body is not less than 2mm. The purpose is to better withstand higher voltages. The wall thickness t between the outer end of the stress cone horn where the stress cone is placed on the main body and the outer side of the main body is not less than 3.5mm. The design of increasing the wall thickness is adopted to ensure strength.

[0029] The outer surface of the main body is treated with mirror finish, which makes it less susceptible to stains and rainwater, and better achieves the effect of anti-fouling and waterproofing.

[0030] The inner diameter surface of the main body is treated with mirror finish, so that the resistance of the cable core is smaller when passing through, which is more labor-saving and convenient. The main body and the cable core fit more tightly when wrapped, and the sealing is better.

[0031] The surface of the stress cone is also treated with mirror finish, in order to facilitate the bonding between the stress cone and the insulating layer.

[0032] The upper inclined section and the maximum diameter section of the main body are smoothly transitioned, in order to better guide the rainwater and drain it.

[0033] The Shore hardness of the main body is ≤55A. The purpose is to expand and wrap better. Product material design parameters: tensile strength ≥5.5N / mm^2, elongation at break ≥450%, tear strength ≥20N / mm, tensile permanent deformation ≤5%, relative dielectric constant (50Hz) 2.8-3.5, anti-leakage tracking ≥1A3.5, short-term power frequency breakdown electric field strength ≥20kV / mm, volume resistivity ≥1.0×10^15Ω.cm, loss factor (50Hz) ≤0.004.

[0034] The above-described embodiment is only a preferred solution of the present invention and does not limit the present invention in any form. There are other variations and modifications without exceeding the technical solution described in the claims.

Claims

1. A 10KV power cable cold shrink indoor terminal, comprising a main body, an umbrella skirt, a sealing part and a stress cone, characterized in that: The main body is hollow inside, the stress cone is arranged in the lower part of the main body, the starting part of the upper end of the stress cone is arranged in a trumpet shape, an identification mark is arranged on the outer surface of the main body corresponding to the starting part of the upper end of the stress cone, and the sealing part is arranged on the upper part of the main body; the umbrella skirt part is arranged below the sealing part on the main body, and the umbrella skirt part includes a first umbrella skirt, a second umbrella skirt and a third umbrella skirt arranged in sequence along the main body, and the diameters of the first umbrella skirt, the second umbrella skirt and the third umbrella skirt are all equal; The outer surface of the main body, the inner diameter surface of the main body and the stress cone surface are respectively treated with mirror finish.

2. A 10KV power cable cold shrink indoor terminal according to claim 1, characterized in that: The intervals between the first umbrella skirt, the second umbrella skirt and the third umbrella skirt are all equal, and the upper surfaces of the umbrella skirts are inclined, and the inclination angle between the upper surfaces of the umbrella skirts and the horizontal direction is 15 degrees.

3. A 10KV power cable cold shrink indoor terminal according to claim 1, characterized in that: The sealing portion is composed of three annular ring structures, and the width of the upper annular ring is greater than that of the two lower annular rings.

4. A 10KV power cable cold shrink indoor terminal according to claim 1, characterized in that: The total length of the main body is not less than 200 mm.

5. A 10KV power cable cold shrink indoor terminal according to claim 1, characterized in that: The length of the stress cone is not less than 45 mm, the distance between the throat of the stress cone horn and the uppermost part of the main body is not less than 140 mm, the inner diameter of the main body ranges from 6 to 50 mm, and the diameters of the first umbrella skirt, the second umbrella skirt and the third umbrella skirt are between 20 and 90 mm.

6. A 10KV power cable cold shrink indoor terminal according to claim 1, characterized in that: The wall thickness of the inner tube wall of the main body is not less than 2 mm.

7. A 10KV power cable cold shrink indoor terminal according to claim 1, characterized in that: The wall thickness t between the outer end of the stress cone bell mouth where the stress cone is placed on the main body and the outer side of the main body is not less than 3.5 mm.

8. A 10KV power cable cold shrink indoor terminal according to claim 1, characterized in that: The upper inclined section and the maximum diameter section of the main body are processed with smooth transition.

9. A 10KV power cable cold shrink indoor terminal according to claim 1, characterized in that: The Shore hardness of the main body is ≤55A.

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