A full-insulation medium-voltage cast busbar wall-penetrating structure

Abstract

The utility model discloses a kind of full insulation medium voltage casting busbar wall-penetrating structures. It includes the wall hole set in wall body, the busbar wall-penetrating segment for passing through wall hole and the mounting plate for installing in the surface outside wall body, busbar wall-penetrating segment is through the both ends inside and outside wall hole and is supported by the mounting plate, busbar wall-penetrating segment outside has isolation insulating layer, isolation insulating layer covers the radiating hole outside busbar wall-penetrating segment, mounting plate and isolation insulating layer between are arranged with the insulating sealing ring for sealing the gap between both. Advantage: isolation insulating layer is formed by pouring inorganic mineral and epoxy resin composite material, therefore, can bear power frequency withstand voltage and lightning impulse voltage, can guarantee that wall body or other plugging material and isolation insulating layer directly contact without discharge phenomenon;Meanwhile, the radiating hole of busbar wall-penetrating segment is also filled by the pouring isolation insulating layer, effectively increases the sealing property, so that rainwater cannot flow into indoor through radiating.

Description

Technical Field

[0001] This utility model relates to a fully insulated cast iron busbar for transmitting and distributing electrical energy, and more particularly to a wall-penetrating structure for a fully insulated medium-voltage cast iron busbar. Background Technology

[0002] Fully insulated medium-voltage cast iron busbars are widely used in power plants, substations, and other power distribution facilities. Traditional fully insulated cast iron busbars typically have densely packed ventilation holes, allowing rainwater to easily flow directly into the interior when passing through indoor or outdoor walls. Furthermore, for aesthetic reasons, users often directly build walls onto the fully insulated cast iron busbars or fill wall openings with sealant, which can easily lead to electrical discharge between the cast iron busbar and the wall / sealant. Traditional medium-voltage busbar wall penetration structures suffer from two main problems: insufficient fire resistance (ordinary sealing structures cannot meet fire resistance requirements at 950℃); and difficulties in installation and maintenance (the wall penetration joints require on-site casting, a complex process with a long curing time). Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a fully insulated medium-voltage cast iron busbar through-wall structure that has a more reasonable structure, is easier to install, prevents discharge for safer use, has better insulation effect, and can effectively improve sealing to prevent outdoor water from flowing into the room through heat dissipation holes.

[0004] To solve the above-mentioned technical problems, the fully insulated medium-voltage cast busbar through-wall structure of this utility model includes a through-wall hole provided on the wall, a busbar through-wall section for passing through the through-wall hole, and an mounting plate for mounting on the outer surface of the wall. The busbar through-wall section passes through both the inner and outer ends of the through-wall hole and is supported by the mounting plate. The busbar through-wall section has an insulating layer on the outside, which covers the heat dissipation holes of the busbar through-wall section. An insulating sealing ring for sealing the gap between the mounting plate and the insulating layer is placed between them.

[0005] The mounting plate is fixed to the outside of the wall by expansion bolts or chemical anchors.

[0006] The insulating layer is cast from an inorganic mineral and epoxy resin composite material.

[0007] The mounting plate is an insulating sealing plate.

[0008] The lower part of the insulating sealing ring has an opening.

[0009] The cross-sectional shape of the insulating sealing ring is trapezoidal.

[0010] The inner surface of the wall is provided with a support plate for supporting the inner side of the busbar through-wall section.

[0011] Advantages of this utility model:

[0012] (1) The insulating layer is cast from inorganic mineral and epoxy resin composite material. Therefore, it can withstand power frequency withstand voltage and lightning impulse voltage, and can ensure that the wall or other sealing material is in direct contact with the insulating layer without discharge. At the same time, the cast insulating layer also fills the heat dissipation hole of the busbar through the wall section, effectively increasing the sealing performance and preventing rainwater from flowing into the room through heat dissipation.

[0013] (2) The busbar through-wall joint does not require on-site pouring, making the installation of the medium-voltage busbar through-wall structure more convenient.

[0014] (3) The insulating sealing ring installed between the mounting plate and the insulating layer is used to seal the insulating layer and the outer wall, ensuring a good waterproof sealing effect and improving the fire-resistant, waterproof and insulating performance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the wall-penetrating structure of the fully insulated medium-voltage cast busbar of this utility model. Detailed Implementation

[0016] The fully insulated medium-voltage cast-in-place busbar through-wall structure of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] The fully insulated medium-voltage cast busbar wall-penetrating structure of this embodiment includes a wall-penetrating hole provided on the wall, a busbar wall-penetrating section 5 of the cast busbar body 1 (we define the part of the cast busbar body 1 that penetrates the wall-penetrating hole as the busbar wall-penetrating section 5), and an mounting plate 3 for installation on the outer surface of the wall. The busbar wall-penetrating section 5 passes through both the inner and outer ends of the wall-penetrating hole and is supported by the mounting plate 3. The busbar wall-penetrating section 5 has an isolation insulation layer 2 on the outside, which covers the heat dissipation hole of the busbar wall-penetrating section. In this embodiment, the mounting plate 3 is an insulating sealing plate for insulation. The isolation insulation layer 2 is cast and molded from an inorganic mineral and epoxy resin composite material at the heat dissipation hole of the busbar wall-penetrating section 5 and fills the heat dissipation hole to prevent rainwater from flowing into the room through heat dissipation. An insulating sealing ring 4 is placed between the mounting plate 3 and the isolation insulation layer 2 to seal the gap between the two (the mounting plate 3 and the isolation insulation layer 2). The isolation insulation layer 2, through the mounting plate 3 and the insulating sealing ring 4, cooperates with the wall to seal the cast busbar body 1.

[0018] Furthermore, as shown in the figure, the insulating sealing ring 4 has a trapezoidal cross-sectional shape and an opening at the bottom that facilitates deformation and sealing. The mounting plate 3 penetrates the insulating sealing ring 4 radially and extends its lower end into the opening of the sealing ring 4. After installation, the opening of the insulating sealing ring 4 is in close contact with the insulating layer 2 and undergoes elastic deformation to improve the sealing ability. At this time, because the mounting plate 3 is located inside the opening, the elastic deformation of the insulating sealing ring 4 further seals the area.

Claims

1. A fully insulated medium-voltage cast-in-place busbar through-wall structure, characterized in that: It includes a wall-penetrating hole provided on the wall, a busbar wall-penetrating section (5) for passing through the wall-penetrating hole, and an mounting plate (3) for mounting on the outer surface of the wall. The busbar wall-penetrating section (5) passes through both the inner and outer ends of the wall-penetrating hole and is supported by the mounting plate (3). The busbar wall-penetrating section (5) has an isolation insulation layer (2) on the outside. The isolation insulation layer (2) covers the heat dissipation hole of the busbar wall-penetrating section. An insulating sealing ring (4) for sealing the gap between the mounting plate (3) and the isolation insulation layer (2) is placed between them.

2. The wall-penetrating structure for a fully insulated medium-voltage cast-in-place busbar according to claim 1, characterized in that: The mounting plate (3) is fixed to the outside of the wall by expansion bolts or chemical anchors.

3. The wall-penetrating structure for a fully insulated medium-voltage cast-in-place busbar according to claim 1, characterized in that: The insulating layer (2) is cast using an inorganic mineral and epoxy resin composite material.

4. The wall-penetrating structure for a fully insulated medium-voltage cast-in-place busbar according to claim 1, characterized in that: The mounting plate (3) is an insulating sealing plate.

5. The wall-penetrating structure for a fully insulated medium-voltage cast-in-place busbar according to claim 1, characterized in that: The lower part of the insulating sealing ring (4) has an opening.

6. The wall-penetrating structure for a fully insulated medium-voltage cast-in-place busbar according to claim 1, characterized in that: The cross-sectional shape of the insulating sealing ring (4) is trapezoidal.

7. The wall-penetrating structure for a fully insulated medium-voltage cast-in-place busbar according to claim 1, characterized in that: The inner surface of the wall is provided with a support plate for supporting the inner side of the busbar through-wall section (5).

Images