Fireproof insulation type bus duct

Abstract

The utility model discloses a fire-resistant insulation type bus duct which comprises a bus duct bottom shell and a sealing plate, and an accommodating cavity is arranged between the bus duct bottom shell and the sealing plate. Ceramic insulating end seats are arranged at the front end and the rear end in the accommodating cavity respectively, each ceramic insulating end seat comprises a seat body part and an extension part arranged on the side surface of the seat body part, and the extension parts extend to the outside of the bus duct bottom shell; a mica base is arranged in the middle of the containing cavity, conductor channels which are separated from each other are arranged on the mica base, conducting bars are arranged in the conductor channels and connected to the mica base through clamping structures, and the two ends of each conducting bar sequentially penetrate through the base body part and the extension part respectively and extend to the outer portion of the ceramic insulation end base. And the mica seat is respectively attached to the seat body parts at the two ends. According to the utility model, the fireproof performance and the overall structural strength of the whole bus duct are improved, later maintenance and troubleshooting are facilitated, the insulating property and easy heat dissipation property of the ceramic insulating end seats are improved, and the heat dissipation capability of key parts of the conducting bars is improved, so that the risk of heating and burning of the connecting ends is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of power distribution, in particular to a fire-resistant insulating bus duct. Background Art

[0002] Busbar ducting is a busbar system consisting of a protective metal casing (steel or aluminum), conductive bars, insulation materials, and related accessories. With the emergence of modern engineering facilities and equipment, electricity consumption across various industries has increased rapidly. Traditional cables are no longer sufficient for high-current transmission systems, and the parallel use of multiple cables has brought numerous inconveniences during on-site installation and connection. Busbar ducting, however, is widely used in power distribution systems due to its advantages of easy installation, low temperature rise, and high safety.

[0003] To improve fire resistance, existing bus ducts generally use refractory materials cast inside the bottom shell of the bus duct. For example, Chinese patent publication number CN217282098U discloses a fireproof bus duct that uses a refractory casting layer cast inside the accommodating cavity and coated on the copper busbar to achieve the purpose of fire prevention. However, the production of cast bus ducts has the problem of complex processing technology. Once the casting process is flawed, the fire resistance of the bus duct is greatly affected. Cast bus ducts are not easy to inspect and troubleshoot later. Moreover, for conductors in the bus duct, the closer to the conductive connection, the more severe the heating. However, the inner cavity casting method cannot reduce the risk of heating and combustion at the connection end.

[0004] Therefore, it is urgent to propose a fire-resistant insulating bus duct to solve the above problems. Summary of the Invention

[0005] In order to solve the above problems, the technical solution provided by the present invention is as follows:

[0006] A fire-resistant insulated bus duct comprises a bus duct bottom shell and a sealing plate connected to the bus duct bottom shell, wherein an accommodating cavity is provided between the bus duct bottom shell and the sealing plate; ceramic insulating end seats are respectively provided at the front and rear ends of the interior of the accommodating cavity, and the ceramic insulating end seats comprise a seat body portion and an extension portion arranged on the side of the seat body portion, and the extension portion extends to the outside of the bus duct bottom shell; a mica seat is provided in the middle of the accommodating cavity, and conductor channels separated from each other are provided on the mica seat, and a conductive bar is provided in the conductor channel, and the conductive bar is connected to the mica seat through a snap-on structure, and the two ends of the conductive bar respectively pass through the seat body portion and the extension portion in sequence and extend to the outside of the ceramic insulating end seat; the mica seat is respectively fitted with the seat body portions at both ends.

[0007] The utility model is further configured such that the mica seat includes an upper mica seat and a lower mica seat, and the upper mica seat and the lower mica seat are respectively provided with an upper through groove and a lower through groove; when the upper mica seat and the lower mica seat are connected, the upper through groove and the lower through groove constitute the conductor channel.

[0008] The utility model is further configured such that at least one limiting block is provided in the lower through slot, at least one limiting recess is provided on one side of the conductive bar close to the lower mica seat, and the limiting block is connected in the limiting recess.

[0009] The utility model is further configured such that positioning grooves are provided on both sides of the lower mica seat, a positioning block is provided in the bus duct bottom shell, and the lower mica seat is connected in the bus duct bottom shell through the positioning cooperation between the positioning block and the positioning grooves.

[0010] The present invention is further configured such that the depth of the lower through groove is smaller than the depth of the upper through groove, and both the upper mica seat and the lower mica seat are fitted with the seat body.

[0011] The utility model is further configured such that the ceramic insulating end seat is made of alumina ceramic or boron nitride ceramic.

[0012] The utility model is further configured such that the outside of the conductive bar is covered with an insulating layer, and the outside of the insulating layer is wrapped with a mica tape.

[0013] The utility model is further configured such that a positioning hole is provided on the bottom shell of the bus duct opposite to the sealing plate, and the sealing plate is connected to the bottom shell of the bus duct through the positioning hole via a fastener.

[0014] The utility model is further configured to have a through hole provided at a position of the bus duct bottom shell facing the ceramic insulating end seat, and the extension portion is connected in the through hole; a through hole is provided on the ceramic insulating end seat that passes through the seat body and the extension portion, and the conductive bar is inserted in the through hole.

[0015] The utility model is further configured such that the ceramic insulating end seat is integrally formed.

[0016] Compared with the prior art, the technical solution provided by this utility model has the following beneficial effects:

[0017] In this technical solution, the bus duct is provided with ceramic insulating end seats at the front and rear ends and mica seats are provided between the ceramic insulating end seats. The ceramic insulating end seats and mica seats are used to ensure the stable connection of the conductive busbar on the bottom shell of the bus duct. The close arrangement of the ceramic insulating end seats and the mica seats isolates the conductive buses inside the bottom shell of the bus duct from each other, thereby improving the fire resistance and overall structural strength of the entire bus duct and facilitating later maintenance and inspection. The extended part of the ceramic insulating end seat extends to the outside of the bottom shell of the bus duct, covering the position close to the conductive busbar connection. The insulation and heat dissipation properties of the ceramic insulating end seat improve the heat dissipation capacity of the key parts of the conductive busbar, thereby reducing the risk of heat and combustion at the connection end. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional diagram of the bus duct according to an embodiment of the present utility model.

[0019] Figure 2 This is an exploded view of the bus duct in an embodiment of the present utility model.

[0020] Figure 3 This is a three-dimensional diagram of the ceramic insulating end seat according to an embodiment of the present utility model.

[0021] Figure 4 This is a schematic diagram of the end of the bus duct in an embodiment of the present utility model.

[0022] Figure 5 This is an exploded view of the bus duct bottom shell and mica seat in an embodiment of the present utility model.

[0023] Figure 6 This is a cross-sectional view of the conductive bar and the lower mica seat along the direction of electrical conduction according to an embodiment of the present invention.

[0024] Figure 7 This is a cross-sectional view of a conductive bar according to an embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings and embodiments.

[0026] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0027] In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, an integral connection, or a detachable connection; it can be a mechanical connection or an electrical connection, or it can be the internal communication between two components; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0028] Combined with attachment Figure 1 To the attached Figure 7 The technical solution of the present utility model is a fire-resistant insulating bus duct, comprising a bus duct bottom shell 1 and a sealing plate 2 connected to the bus duct bottom shell 1, a receiving cavity 3 is provided between the bus duct bottom shell 1 and the sealing plate 2; a ceramic insulating end seat 4 is provided at the front and rear ends of the interior of the receiving cavity 3, the ceramic insulating end seat 4 comprises a seat body 41 and an extension portion 42 arranged on the side of the seat body 41, the extension portion 42 extends to the outside of the bus duct bottom shell 1; a mica seat 5 is provided in the middle of the receiving cavity 3, and conductor channels 51 separated from each other are provided on the mica seat 5, and a conductive bar 6 is provided in the conductor channel 51, and the conductive bar 6 is connected to the mica seat 5 by a snap-on structure, and the two ends of the conductive bar 6 respectively pass through the seat body 41 and the extension portion 42 in sequence and extend to the outside of the ceramic insulating end seat 4; the mica seat 5 is respectively fitted with the seat body 41 at both ends.

[0029] In the above embodiment, since the ceramic insulating end seat 4 includes an extension portion 42 extending to the outside of the bus duct bottom shell 1, during actual installation, the ceramic insulating end seats 4 at both ends are first placed in the accommodating cavity 3, and the extension portion 42 is pushed to the outside of the bus duct bottom shell 1, and then the mica seat 5 is placed in the accommodating cavity 3.

[0030] In this embodiment, as shown in the attached Figure 5 As shown, the mica seat 5 includes an upper mica seat 52 and a lower mica seat 53, and the upper mica seat 52 and the lower mica seat 53 are respectively provided with an upper through groove 521 and a lower through groove 531; when the upper mica seat 52 and the lower mica seat 53 are connected, the upper through groove 521 and the lower through groove 531 constitute the conductor channel 51.

[0031] In the above embodiment, the mica seat 5 adopts an upper and lower split structure, which is convenient for assembly and subsequent inspection and maintenance.

[0032] In this embodiment, as shown in the attached Figure 6 As shown, at least one limit block 532 is provided in the lower through groove 531, and at least one limit recess 61 is provided on the side of the conductive bar 6 close to the lower mica seat 53, and the limit block 532 is connected in the limit recess 61; the cooperation between the limit block 532 and the limit recess 61 realizes the lateral limitation of the conductive bar 6 on the lower mica seat 53.

[0033] In this embodiment, positioning grooves 533 are provided on both sides of the lower mica seat 53, and a positioning block 11 is provided in the bus duct bottom shell 1. The lower mica seat 53 is connected to the bus duct bottom shell 1 through the positioning cooperation between the positioning block 11 and the positioning groove 533; this positioning structure ensures that the lower mica seat 53 remains stationary relative to the bus duct bottom shell 1.

[0034] In this embodiment, the depth of the lower through groove 531 is smaller than the depth of the upper through groove 521. During the assembly process, the lower mica seat 53 is first installed in the accommodating cavity 3, and then the conductive bar 6 is inserted and connected, and finally the upper mica seat 52 is covered. Therefore, the smaller depth of the lower through groove 531 can reduce the friction force when the conductive bar 6 is inserted; the upper mica seat 52 and the lower mica seat 53 are both in contact with the seat body 41.

[0035] In this embodiment, the ceramic insulating terminal block 4 is made of alumina ceramic or boron nitride ceramic. Preferably, the ceramic insulating terminal block 4 is made of alumina ceramic material, which has high temperature resistance, electrical insulation and high thermal conductivity, meeting the insulation and thermal conductivity requirements of the conductor in the bus duct, and is cheaper than boron nitride ceramic.

[0036] In this embodiment, as shown in the attached Figure 7 As shown, the outside of the conductive bar 6 is covered with an insulating layer 62 , and the outside of the insulating layer 62 is wrapped with a mica tape 63 .

[0037] In this embodiment, as shown in the attached Figure 4 and attached Figure 5 As shown, a positioning hole 12 is provided at a position of the bus duct bottom shell 1 facing the sealing plate 2 , and the sealing plate 2 is connected to the bus duct bottom shell 1 via a fastener 21 passing through the positioning hole 12 .

[0038] In this embodiment, as shown in the attached Figure 5 As shown, the busbar bottom shell 1 is provided with a through hole 13 at a position facing the ceramic insulating end seat 4, and the extension portion 42 is connected to the through hole 13; Figure 3 As shown, the ceramic insulating end seat 4 is provided with a through hole 43 penetrating the seat body 41 and the extension portion 42 , and the conductive bar 6 is inserted into the through hole 43 .

[0039] In this embodiment, the ceramic insulating end seat 4 is integrally formed.

[0040] The technical solution of this embodiment of the bus duct is provided with ceramic insulating end seats at the front and rear ends and mica seats are provided between the ceramic insulating end seats. The ceramic insulating end seats and mica seats are used to ensure the stable connection of the conductive busbar on the bottom shell of the bus duct. The close arrangement of the ceramic insulating end seats and the mica seats isolates the conductive buses inside the bottom shell of the bus duct from each other, thereby improving the fire resistance and overall structural strength of the entire bus duct and facilitating later maintenance and inspection. The extended portion of the ceramic insulating end seat extends to the outside of the bottom shell of the bus duct, covering the position close to the conductive busbar connection. The insulation and heat dissipation properties of the ceramic insulating end seat improve the heat dissipation capacity of the key parts of the conductive busbar, thereby reducing the risk of heat and combustion at the connection end.

[0041] The above is a schematic description of the present invention and its embodiments, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by this and, without departing from the inventive purpose of the present invention, designs a structure and embodiment similar to the technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A fire-resistant insulated bus duct, characterized in that: It includes a bus duct bottom shell and a sealing plate connected to the bus duct bottom shell, and an accommodating cavity is provided between the bus duct bottom shell and the sealing plate; ceramic insulating end seats are respectively provided at the front and rear ends of the interior of the accommodating cavity, and the ceramic insulating end seats include a seat body and an extension portion arranged on the side of the seat body, and the extension portion extends to the outside of the bus duct bottom shell; a mica seat is provided in the middle of the accommodating cavity, and the mica seat is provided with conductor channels separated from each other, and a conductive row is provided in the conductor channel, and the conductive row is connected to the mica seat through a clamping structure, and the two ends of the conductive row respectively pass through the seat body and the extension portion in sequence and extend to the outside of the ceramic insulating end seat; the mica seat is respectively fitted with the seat body at both ends.

2. A fire-resistant insulated bus duct according to claim 1, characterized in that: The mica seat includes an upper mica seat and a lower mica seat, and the upper mica seat and the lower mica seat are respectively provided with an upper through groove and a lower through groove; when the upper mica seat and the lower mica seat are connected, the upper through groove and the lower through groove constitute the conductor channel.

3. The fire-resistant insulated bus duct according to claim 2, characterized in that: At least one limiting block is provided in the lower through slot, and at least one limiting recess is provided on a side of the conductive bar close to the lower mica seat, and the limiting block is connected in the limiting recess.

4. The fire-resistant insulated bus duct according to claim 2, characterized in that: Positioning grooves are provided on both sides of the lower mica seat, and a positioning block is provided in the bus duct bottom shell. The lower mica seat is connected to the bus duct bottom shell through the positioning cooperation between the positioning block and the positioning grooves.

5. The fire-resistant insulated bus duct according to claim 2, characterized in that: The depth of the lower through groove is smaller than that of the upper through groove, and both the upper mica seat and the lower mica seat are in contact with the seat body.

6. A fire-resistant insulated bus duct according to any one of claims 1 to 5, characterized in that: The ceramic insulating end seat is made of alumina ceramics or boron nitride ceramics.

7. The fire-resistant insulated bus duct according to any one of claims 1 to 5, characterized in that: The outside of the conductive bar is covered with an insulating layer, and the outside of the insulating layer is wrapped with a mica tape.

8. The fire-resistant insulated bus duct according to any one of claims 1 to 5, characterized in that: A positioning hole is provided on the bottom shell of the bus duct opposite to the sealing plate, and the sealing plate is connected to the bottom shell of the bus duct through the positioning hole via a fastener.

9. The fire-resistant insulated bus duct according to any one of claims 1 to 5, characterized in that: A through hole is provided on the bottom shell of the bus duct opposite to the ceramic insulating end seat, and the extension portion is connected to the through hole; a through hole is provided on the ceramic insulating end seat that passes through the seat body and the extension portion, and the conductive bar is inserted into the through hole.

10. The fire-resistant insulated bus duct according to any one of claims 1 to 5, characterized in that: The ceramic insulating end seat is integrally formed.

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