Water resistance tree medium voltage insulated cable material and cable

Abstract

The present invention provides a WTR medium voltage insulating cable material and a cable made of the material, and pertains to cable domain. A medium voltage WTR irradiated polyethylene insulating material is produced by adding a compound WTR growth promoting agent; the compound WTR growth promoting agent comprises hydrogenated polysaccaride, organized montmorillonite, maleic anhydride grafts, and silicone polymer between molecular weight 1000-5000; the parts by weight of the ingredients of the WTR medium voltage insulating cable material are: low density polyethylene: 100, maleic anhydride grafts: 2-10, hydrogenated polysaccaride: 0.2-1, organized montmorillonite: 0.01-1.5, silicone polymer: 0.01-1.5, cross-linking agent: 2-3, and antioxidant: 0.3-0.5. The insulating material in the present invention has WTR growth function, break through the bottle neck of WT growth of the cable insulation itself, and can prolong the service life of the cables. With the WTR medium voltage insulatingcable material, environment protective halogen-free flame retardant medium voltage WTR irradiated polyethylene insulated power cables or PVC medium voltage WTR irradiated polyethylene insulated powercables can be manufactured.

Description

technical field

[0001] The water-tree-resistant medium-voltage insulating cable material and the cable of the invention belong to the field of cables. Background technique

[0002] At present, my country is implementing urban and rural power grid transformation, western development and large-scale upgrading and transformation of communication facilities, and there is a large demand for wire and cable products. On the one hand, the service life of the cable is affected by external factors such as fire and rat ant erosion. On the other hand, the growth of water trees in the cable insulation layer itself is an important reason affecting the cable. Conventional cross-linked polyethylene materials cannot solve this technical bottleneck, and prolonging the service life of cables is an important means to ensure the normal operation of the power grid. Contents of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of conventional medium-vol...

Examples

Embodiment 1

[0040] Example 1: Preparation of organic montmorillonite by microwave

[0041] Add 25g of montmorillonite and 750g of deionized water, raise the temperature to 75 degrees, add dropwise an aqueous solution containing 12g of dinonyldimethylammonium bromide at a concentration of 20%, and treat it with microwave for 7 minutes every 45 minutes after the addition is completed , stirred for 5 hours, filtered with suction, washed the precipitate with deionized water, silver nitrate (0.1mol / L) could not detect bromide ions, dried in vacuum to constant weight, ground and sieved through 200 meshes to obtain organic modified montmorillonite earth.

Embodiment 2

[0042] Example 2: Preparation of Medium Voltage XLPE Insulated Cable Material

[0043] The composition of the formula in parts by weight of medium-voltage XLPE insulated cable material:

[0044] Low-density polyethylene 100 parts

[0045] Dicumyl peroxide 1.8 parts

[0046] 0.6 parts of bis-tert-butylperoxycumene

[0047] Tris(2,4-di-tert-butylphenyl)phosphite 0.1 parts

[0048] 0.3 parts of 4,4'-thiobis(3-methyl-6-tert-butylphenol)

Embodiment 3--9

[0049] Examples 3-9: According to Example 2, the formula of the compound anti-water tree growth agent was changed, and the anti-water tree medium-voltage XLPE insulating cable material was prepared, as shown in Table 1:

[0050] Table 1. The medium-voltage insulating cable material prepared by adding different anti-water tree growth agents to the basic formula of Example 2

[0051] Example

hydrogenated glycans

Organic Montmorillonite

maleic anhydride graft

silicone polymer

wxya

2

--

--

--

--

6.2

3

0.5

--

--

--

15.6

4

--

0.1

--

--

11.4

5

--

--

7

--

15.2

6

--

--

--

0.1

9.5

7

0.5

0.1

7

0.1

24.5

8

0.6

0.1

6

0.1

24.3

9

0.5

0.2

6

0.1

24.6

[...

technical field

[0001] The water-tree-resistant medium-voltage insulating cable material and the cable of the invention belong to the field of cables. Background technique

[0002] At present, my country is implementing urban and rural power grid transformation, western development and large-scale upgrading and transformation of communication facilities, and there is a large demand for wire and cable products. On the one hand, the service life of the cable is affected by external factors such as fire and rat ant erosion. On the other hand, the growth of water trees in the cable insulation layer itself is an important reason affecting the cable. Conventional cross-linked polyethylene materials cannot solve this technical bottleneck, and prolonging the service life of cables is an important means to ensure the normal operation of the power grid. Contents of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of conventional medium-vol...

Examples

Embodiment 1

[0040] Example 1: Preparation of organic montmorillonite by microwave

[0041] Add 25g of montmorillonite and 750g of deionized water, raise the temperature to 75 degrees, add dropwise an aqueous solution containing 12g of dinonyldimethylammonium bromide at a concentration of 20%, and treat it with microwave for 7 minutes every 45 minutes after the addition is completed , stirred for 5 hours, filtered with suction, washed the precipitate with deionized water, silver nitrate (0.1mol / L) could not detect bromide ions, dried in vacuum to constant weight, ground and sieved through 200 meshes to obtain organic modified montmorillonite earth.

Embodiment 2

[0042] Example 2: Preparation of Medium Voltage XLPE Insulated Cable Material

[0043] The composition of the formula in parts by weight of medium-voltage XLPE insulated cable material:

[0044] Low-density polyethylene 100 parts

[0045] Dicumyl peroxide 1.8 parts

[0046] 0.6 parts of bis-tert-butylperoxycumene

[0047] Tris(2,4-di-tert-butylphenyl)phosphite 0.1 parts

[0048] 0.3 parts of 4,4'-thiobis(3-methyl-6-tert-butylphenol)

Embodiment 3--9

[0049] Examples 3-9: According to Example 2, the formula of the compound anti-water tree growth agent was changed, and the anti-water tree medium-voltage XLPE insulating cable material was prepared, as shown in Table 1:

[0050] Table 1. The medium-voltage insulating cable material prepared by adding different anti-water tree growth agents to the basic formula of Example 2

[0051] Example

hydrogenated glycans

Organic Montmorillonite

maleic anhydride graft

silicone polymer

wxya

2

--

--

--

--

6.2

3

0.5

--

--

--

15.6

4

--

0.1

--

--

11.4

5

--

--

7

--

15.2

6

--

--

--

0.1

9.5

7

0.5

0.1

7

0.1

24.5

8

0.6

0.1

6

0.1

24.3

9

0.5

0.2

6

0.1

24.6

[...

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