CN210985564U

CN210985564U - Compact intensive fire-resistant bus duct

Info

Publication number: CN210985564U
Application number: CN201922303941.3U
Authority: CN
Inventors: 马松涛; 马纪财
Original assignee: Jiangsu Oneq Electrical Appliance Group Co ltd
Current assignee: Jiangsu Oneq Electrical Appliance Group Co ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-07-10
Anticipated expiration: 2029-12-20

Abstract

The utility model discloses a compact intensive fire-resistant bus duct, which comprises a bus holding tank consisting of two symmetrically arranged side plates and two symmetrically arranged cover plates, wherein the outer sides of the two side plates are respectively provided with a plurality of U-shaped tubular radiating fins, and a cavity formed between the U-shaped tubular radiating fins and the side plates is vertical; mica plate fire-resistant insulating layers are arranged on the inner walls of the two cover plates and the two side plates, an A line, a B line, a C line, an N line and a PE line are sequentially arranged in the bus accommodating tank, and the A line, the B line, the C line, the N line and the PE line are wound and insulated through mica tapes; the PE wire is communicated with the bus accommodating groove and integrally grounded, and the cross-sectional areas of the equal copper conductors of the PE wire and the bus accommodating groove are larger than or equal to the cross-sectional areas of the line A, the line B, the line C and the line N; the utility model provides a bus duct radiating efficiency is high, structural strength is high, fire resistance is strong.

Description

Compact intensive fire-resistant bus duct

Technical Field

The utility model particularly relates to a compact intensive fire-resistant bus duct.

Background

The bus duct is internally provided with a plurality of busbars for transmitting electric energy and has the functions of collecting and distributing electric power. Through which the electrical energy output by the generator, transformer or rectifier is delivered to the individual users or other substations. Busways have increasingly replaced electrical wiring and cabling in power transmission trunk engineering projects. Developed countries abroad, hong Kong, Macau, etc. are popularized. In Guangzhou, Guangdong of China, more than 12 building distribution rooms are led out, namely, more than 90% of main lines led to floors use bus ducts; the 630KVA transformer to the power distribution cabinet uses bus ducts. Bus ducts used in public buildings, hotels and office buildings of large and medium-sized cities are also popularized, and the bus ducts are the best choice for power transmission main lines with indoor rated voltage of below 1000V. Because the bus duct bears a large current in the process of electric energy transmission, the temperature rise of the bus duct per se has great influence on the line loss and the safety, and the temperature rise problem caused by difficult heat dissipation is particularly prominent in the intensive bus duct.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects of the prior art, and provides a compact and dense fire-resistant bus duct, which comprises a bus holding tank consisting of two symmetrically arranged side plates and two symmetrically arranged cover plates, wherein a plurality of U-shaped tubular cooling fins are arranged on the outer sides of the two side plates, and a cavity formed between the U-shaped tubular cooling fins and the side plates is vertical; mica plate fire-resistant insulating layers are arranged on the inner walls of the two cover plates and the two side plates, an A line, a B line, a C line, an N line and a PE line are sequentially arranged in the bus accommodating tank, and the A line, the B line, the C line, the N line and the PE line are wound and insulated through mica tapes; the PE wire is communicated with the bus containing groove and integrally grounded, and the cross-sectional areas of the equal copper conductors of the PE wire and the bus containing groove are larger than or equal to the cross-sectional areas of the line A, the line B, the line C and the line N.

In order to better realize the fire resistance and heat dissipation performance of the bus duct, preferably, the mica tape is internally added with boron nitride, alumina and aluminum nitride powder fillers.

Preferably, the mica tape is added with alkali-free glass fiber.

Preferably, the mica plate fire-resistant insulating layer is formed by two-time pressing. The mica plate fire-resistant insulating layer formed by twice pressing has higher compactness and integrity, and avoids the phenomena of glue flowing and slip sheets.

Preferably, the upper and lower sections of the side plate are provided with folded edges, and the cover plate is vertically connected with the side plate through the folded edges.

Has the advantages that: the utility model adopts the structure of the U-shaped tubular radiating fins, so that the total radiating area is increased by more than 2.3 times compared with the common bus, compared with other bus ducts with the same structure, the overall temperature rise of the bus duct is lower, the resistance change of the bus conductor is smaller, the line loss is lower, and the electric energy is saved; the structure of the U-shaped tubular radiating fin increases the structural strength of the side plate, so that the bus duct has good bending resistance, torsion resistance and impact resistance; in a vertical cavity formed between the U-shaped tubular radiating fins and the side plates, air convection is continuously generated due to a chimney effect, so that the radiating efficiency is improved. The fireproof capability and the insulating property of the bus duct can be improved by adopting the mica plate fireproof insulating layer and the mica tape, and the insulation between bus conductors can be continuously kept and the bus conductors can continuously run to supply power to fire-fighting equipment when a fire occurs.

Drawings

FIG. 1 is a perspective view of a compact, fire resistant busway;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a front view of FIG. 1;

FIG. 4 is a cross-sectional view of section A-A of FIG. 3;

in the figure: 1. the heat-insulation mica plate comprises side plates, 2, a cover plate, 3, U-shaped tubular cooling fins, 4, mica plate fire-resistant insulation layers, 5, lines A, 6, lines B, 7, lines C, 8, lines N, 9, PE lines, 10 and folded edges.

Detailed Description

In order to deepen the understanding of the present invention, the present invention will be further described in detail with reference to the following embodiments and the attached drawings, and the embodiments are only used for explaining the present invention, and do not constitute the limitation to the protection scope of the present invention.

As shown in fig. 1-4, a compact and dense fire-resistant bus duct comprises a bus accommodating groove formed by two symmetrically arranged side plates 1 and two symmetrically arranged cover plates 2, wherein a plurality of U-shaped tubular cooling fins 3 are arranged on the outer sides of the two side plates, and a cavity formed between each U-shaped tubular cooling fin 3 and each side plate 1 is vertical; mica plate fireproof insulation layers 4 are arranged on the inner walls of the two cover plates 2 and the two side plates 1, an A wire 5, a B wire 6, a C wire 7, an N wire 8 and a PE wire 9 are sequentially arranged in the bus accommodating groove, and the A wire, the B wire, the C wire, the N wire and the PE wire are wound and insulated through mica tapes; the PE wire 9 is communicated with the bus containing groove and integrally grounded, and the cross section areas of the equal copper conductors of the PE wire and the bus containing groove are larger than or equal to the cross section areas of the line A, the line B, the line C and the line N.

The mica tape is internally added with boron nitride, alumina and aluminum nitride powder filler.

The mica tape is added with alkali-free glass fiber.

The mica plate fire-resistant insulating layer is formed by two-time pressing.

The upper and lower sections of the side plates are provided with folded edges, and the cover plate 2 and the side plate 1 are mutually and vertically connected through the folded edges 10.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A compact intensive fire-resistant bus duct is characterized by comprising a bus accommodating groove formed by two symmetrically arranged side plates and two symmetrically arranged cover plates, wherein a plurality of U-shaped tubular radiating fins are arranged on the outer sides of the two side plates, and a cavity formed between each U-shaped tubular radiating fin and each side plate is vertical; mica plate fire-resistant insulating layers are arranged on the inner walls of the two cover plates and the two side plates, an A line, a B line, a C line, an N line and a PE line are sequentially arranged in the bus accommodating tank, and the A line, the B line, the C line, the N line and the PE line are wound and insulated through mica tapes; the PE wire is communicated with the bus containing groove and integrally grounded, and the cross-sectional areas of the equal copper conductors of the PE wire and the bus containing groove are larger than or equal to the cross-sectional areas of the line A, the line B, the line C and the line N.

2. A compact, dense refractory bus duct as defined in claim 1, wherein said mica tape is internally loaded with boron nitride, alumina and aluminum nitride powder fillers.

3. A compact, dense, fire-resistant bus duct of claim 2, wherein said mica tape is internally loaded with alkali-free glass fibers.

4. The compact and dense fire-resistant bus duct of claim 1, wherein said insulation layer of mica plate is formed by two pressing steps.

5. The compact and dense fire-resistant bus duct of claim 1, wherein the upper and lower sections of the side plates are provided with folded edges, and the cover plate and the side plates are vertically connected with each other through the folded edges.