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Ring main unit

A technology of ring main unit and cabinet body is applied in the field of ring main unit, which can solve the problems of reducing the percentage of sulfur hexafluoride gas and decreasing insulation performance, and achieve the effects of improving drying shrinkage performance, improving plasticity and good oil resistance.

Inactive Publication Date: 2019-10-08
威倍智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the proportion of sulfur hexafluoride gas decreases. When the proportion of sulfur hexafluoride drops to 40%, it may cause accidents due to the decline in insulation performance. Therefore, the sealing problem must be paid attention to

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A ring network cabinet includes a cabinet body filled with sulfur hexafluoride gas, and the surface of the cabinet body is coated with sealing paint to form a sealing coating. The raw materials of the sealing coating are shown in Table 1 in parts by weight. The preparation molding method of this sealing coating comprises the following steps:

[0037] Step 1, adding nitrile rubber into the masticating machine for masticating to obtain the first-grade rubber compound;

[0038] Step 2, put the first-grade rubber material into the rubber mixer and add phenolic resin, and mix evenly through mixing to obtain the second-grade rubber material;

[0039] Step 3, adding ethyl acetate to the secondary rubber material, making the secondary rubber material continuously dissolve during the stirring process, and continuing to add methyl ethyl ketone to obtain the glue solution;

[0040] Step 4, add white carbon black, zinc oxide, dioctyl phthalate, N-oxydiethylene thiocarbamoyl-N' te...

Embodiment 2

[0044] The difference from Example 1 is that, in terms of parts by weight, the raw materials of the seal coat are shown in Table 1.

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PUM

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Abstract

The invention discloses a ring main unit, and relates to the field of electrical equipment. The ring main unit comprises a cabinet body, the cabinet body is filled with sulfur hexafluoride gas, the surface of the cabinet body is coated with a sealing coat to form a sealing coating, the sealing coat is prepared from the followingthe raw materialcomponents in parts by weight: 100-120 parts of nitrile rubber, 50-60 parts of phenolic resin, 16-20 parts of a reinforcing agent, 4-6 parts of dioctyl phthalate, 8-12 parts of a vulcanized agent, 1-3 parts of an anti-aging agent and 200-220 parts of a solvent. The ring main unit has the following advantages that the nitrile rubber has the characteristics of very good oil resistance, high abrasion resistance, good heat resistance, high bonding forceand the like. The nitrile rubber and phenolic resin are used together, the hardness, the adhesive force and the liquid resistant performance of the coating can be improved. The dioctyl phthalate can serve as a plasticizer, the plasticity and the flexibility of the coating are improved, and the drying shrinkage performance is improved. The sealing performance of the ring main unit is improved through the sealing coating, the machining defects such as welding lines and sand holes are effectively coated, thus loss of the sulfur hexafluoride gas is avoided, and the safe performance is improved.

Description

technical field [0001] The invention relates to the technical field of electric equipment, and more specifically, it relates to a ring network cabinet. Background technique [0002] The ring network cabinet is a group of transmission and distribution electrical equipment (high-voltage switchgear) installed in a metal or non-metal insulated cabinet or made into an assembled interval ring network power supply unit. [0003] At present, most of the ring network cabinets are gas-insulated ring network cabinets, and sulfur hexafluoride gas is used as the insulation or breaking medium of the high-voltage live parts. When the pressure of sulfur hexafluoride gas in the cabinet drops to atmospheric pressure, it seems that the internal and external pressures are equal, and the gas does not leak. However, from the perspective of penetration, the concentration of sulfur hexafluoride gas in the cabinet is obviously higher than that outside the cabinet. It still seeps out, otherwise the ...

Claims

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Application Information

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IPC IPC(8): C09D109/02C09D161/06C09D7/61C09D7/63C09D7/65C09D7/20H02B13/045
CPCC08K2003/2296C08L2205/03C09D109/02C09D7/20C09D7/61C09D7/63C09D7/65H02B13/045C08L61/06C08L93/04C08K13/02C08K5/12C08K3/32C08K3/36C08K3/22
Inventor 李秀左谢火林高敏考
Owner 威倍智能科技有限公司
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