Shell-protection integrated mineral fireproof bus duct

Abstract

The utility model discloses a shell protection integrated mineral fireproof bus duct, which comprises a top cover plate, a bottom sealing plate, a front side plate, a rear side plate and a four-phase busbar conductor, the middle of the inner side of the top cover plate and the middle of the inner side of the bottom sealing plate are each provided with an inner partition plate extending in the height direction between the top cover plate and the bottom sealing plate, and the inner partition plates and the top cover plate or the bottom sealing plate form a T-shaped structure. A pair of T-shaped structures which are symmetrical up and down are in butt joint to form an I-shaped structure which separates four-phase busbar conductors pairwise, and the inner partition plate is used as an internal PE wire for independent evacuation of accident current in the whole bus duct shell when a single phase is grounded; each phase of busbar conductor corresponding to the four phases of busbar conductors is wound with a waterproof and high-temperature-resistant ceramic mica tape which is used for mutual insulation and isolation. Insulation, phase isolation, high temperature resistance and water resistance are achieved, the insulation performance between the busbar and the connecting conductor and the stability of electrical connection are improved, and the reliability of the bus duct is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technology of bus duct in power cable especially relates to a shell and fireproof mineral bus duct of integrated protection. BACKGROUND

[0002] With the development of science and technology, as an important equipment in the power system, the bus duct has become a development trend instead of the existing cable and plays an important role in the transmission and distribution process of electric power; the bus duct is a kind of closed metal device composed of copper and aluminum bus columns and is used to distribute large power to each element of the dispersion system, and the bus duct system is a power distribution device for efficient current transmission, which has been increasingly used to replace the wire and cable in the indoor low-voltage power transmission trunk line engineering project.

[0003] However, the existing bus duct assembly structure has the problems of poor insulation performance, poor wind resistance and shock resistance due to the single structure of the insulating plate, the easy polarization of the insulating plate around the conductive row and the charged area with the charged phenomenon, and the existing bus duct cannot meet the use requirement due to the high temperature resistance and fire resistance performance of the power environment.

[0004] There are various reasons for the overhigh temperature of the bus duct, such as overloading of the power system, which exceeds the rated carrying capacity of the connector and causes overheating; poor contact leads to overhigh temperature, increases the resistance of the bus duct and further aggravates the overheating phenomenon; environmental factors cause the overhigh temperature of the bus duct; and the material quality of the bus duct also affects its high temperature resistance, for example, low copper content of the copper row leads to large resistance and thus increases the temperature rise; in addition, the heat dissipation performance of the insulating material and the shell structure also affects the temperature control of the bus duct.

[0005] Especially, the existing bus duct used in the fire-fighting power distribution line needs to withstand 950-degree flame conditions and continuously supply power for 180 minutes; however, due to the structure layout, connection mode and material quality of the existing bus duct products at home and abroad, they cannot be easily disassembled and assembled and can withstand 950-degree flame conditions and continuously supply power for 180 minutes. Moreover, most of the existing bus ducts have heat insulation layers outside the connector or ceramic silica mud cast at the connection, which has poor temperature resistance and waterproof performance, so that the bus duct cannot withstand 950-degree flame conditions for 180 minutes, causing insulation failure, heating of the connector and short circuit, and thus causing the main power transmission line to be out of power. CONTENT OF THE UTILITY MODEL

[0006] The shell and fireproof mineral bus duct of integrated protection provided by the utility model has ceramic mica tape wound on each phase bus conductor, realizes insulation and phase separation, is resistant to 950-degree high temperature and waterproof, completely solves the problem of fire-fighting power supply, improves the insulation performance between the bus bars and the stability of electrical connection, and effectively improves the reliability of the bus duct.

[0007] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0008] The shell-protection integrated mineral refractory busway is used for the insulation and enclosed protection of the conductive busbars, and includes a top cover plate, a bottom sealing plate, a front side plate, a rear side plate and four-phase busbar conductors. The top cover plate and the bottom sealing plate are respectively disposed on the top side and the bottom side of the four-phase busbar conductors for sealing the upper and lower sides, and the front side plate and the rear side plate are respectively disposed on the front side and the rear side of the four-phase busbar conductors for sealing the front and rear sides;

[0009] An inner partition plate extending along the height direction between the top cover plate and the bottom sealing plate is provided in the middle of the inner sides of the top cover plate and the bottom sealing plate. The inner partition plate and the top cover plate or the bottom sealing plate respectively form an "X" - shaped structure. The top cover plate and the bottom sealing plate are formed by docking a pair of upper and lower symmetric "X" - shaped structures to form an "I" - shaped structure that separates the four-phase busbar conductors in pairs front and back. The inner partition plates on the "I" - shaped structure corresponding to the middle parts of the four-phase busbar conductors in pairs front and back are used as internal PE lines for independent evacuation of the accident current inside the entire busway shell when a single phase is grounded;

[0010] An insulating phase - separating sleeve for mutual insulation and isolation between the phase conductors of each phase and for waterproof and high - temperature resistance is respectively sleeved or wound on each phase busbar conductor corresponding to the four-phase busbar conductors;

[0011] The top cover plate, the bottom sealing plate, the front side plate and the rear side plate jointly form an outer shell PE line for evacuating the accident current of the outer shell when a single phase is grounded. The outer shell PE line and the internal PE line jointly form an inverted "曰" - shaped double - busbar PE shell - protection joint structure.

[0012] Preferably, both ends of the top cover plate and the bottom sealing plate are respectively folded to form a "ㄩ" - shaped platform structure for facilitating heat dissipation.

[0013] Preferably, L - shaped aluminum - magnesium alloy attached side plates for end - side sealing, angle iron plates for end - to - end docking and locking connection, and connecting screws are respectively provided at the end connection parts of the top cover plate, the bottom sealing plate, the front side plate and the rear side plate.

[0014] Preferably, L - shaped sealing strips for sealing connection are further provided at the butt - joint end faces of the L - shaped aluminum - magnesium alloy attached side plates and the front side plate and the rear side plate respectively.

[0015] Preferably, an arc - shaped groove for embedding and fixing the L - shaped sealing strip is recessed at the corner of the L - shaped aluminum - magnesium alloy attached side plate, and a round convex rib matching the arc - shaped groove is protruded at the corner of the L - shaped sealing strip.

[0016] Preferably, a plurality of semicircular reinforcing ribs for increasing the strength of the front side plate or the rear side plate are uniformly installed on the outer side walls of the front side plate and the rear side plate along the length direction.

[0017] Preferably, the front side plate and the inner partition plate connected therewith, and the rear side plate and the inner partition plate connected therewith are integrally made of an environment-friendly color-coated steel plate.

[0018] The utility model discloses the beneficial effects are:

[0019] Through the L-shaped aluminum magnesium alloy side plate, angle iron plate and connecting screw, the top cover plate, bottom sealing plate, front side plate and rear side plate end four corners are effectively fixed and connected, and the corresponding four-phase busbar conductors are effectively sealed and fixed, the shell PE line and the internal PE line jointly constitute the inverted double busbar PE shell preservation combined structure of " " character, effectively increase the leakage current flow of the inside and outside of the shell, avoid the leakage current flow that cannot be discharged in time caused by insufficient flow, avoid the uncertainty of the overcurrent capacity between the shell and the independent PE, effectively avoid the unevenness of three-phase voltage drop, ensure the temperature rise of each part and effectively improve the grounding protection, and convenient to install and maintain.

[0020] In addition, in view of the problem that the insulation part of the existing four-phase busbar conductor is not waterproof and is easy to absorb moisture, which can cause low insulation after connection, the ceramic mica tape is wound on each phase busbar conductor, realizing insulation and phase separation, resisting 950 degrees of high temperature, preventing water, completely solving the problem of fire use electricity, and improving the insulation performance and electrical connection stability between the busbar and the connected conductor. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is the explosion structure schematic diagram of the utility model;

[0022] Figure 2 is the horizontal cross section structure schematic diagram of the utility model;

[0023] Figure 3 is Figure 2 the enlarged structure schematic diagram of A part in the middle;

[0024] Figure 4 is the bottom view three-dimensional structure schematic diagram of the utility model;

[0025] Figure 5 is the top view three-dimensional structure schematic diagram of the utility model.

CONCRETE IMPLEMENTATION

[0026] Clearly and completely describe the technical scheme in the embodiments of the utility model in combination with the drawings in the embodiments of the utility model, obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of protection of the utility model.

[0027] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in a drawing, it does not need to be further defined and explained in the subsequent drawings. In the description of the utility model, it should be explained that the terms "left", "right", "front", "rear" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the utility model product is used, only for the convenience of describing the utility model and simplifying the description, not indicating or implying that the indicated device or element must have a specific orientation, structure and operation, therefore, it cannot be understood as a limitation on the utility model.

[0028] The shell and the integrated mineral matter fire-resistant bus duct are used for the insulation and closed protection of the electric bus, such as Figures 1 to 5As shown, the system includes a top cover plate 1, a bottom sealing plate 2, a front side plate 3, a rear side plate 4, and a four-phase busbar conductor 5. The top cover plate 1 and the bottom sealing plate 2 are respectively placed on the top and bottom sides of the four-phase busbar conductor 5 for sealing the upper and lower sides. The front side plate 3 and the rear side plate 4 are respectively placed on the front and rear sides of the four-phase busbar conductor 5 for sealing the front and rear sides. An inner partition plate 6 extending along the height direction between the top cover plate 1 and the bottom sealing plate 2 is provided in the middle of the inner side of both the top cover plate 1 and the bottom sealing plate 2. The inner partition plate 6 forms a "U"-shaped structure with the top cover plate 1 or the bottom sealing plate 2. The front side plate 3 and its extended inner partition plate 6, and the rear side plate 4 and its extended inner partition plate 6 are all integrally made of environmentally friendly color-coated steel plates. The top cover plate 1 and the bottom sealing plate 2, formed by a pair of symmetrical "U"-shaped structures joined together, form an "I"-shaped structure that separates the front and rear of the four-phase busbar conductor 5, corresponding to the middle of the front and rear pairs of the four-phase busbar conductor 5. The inner partition plate 6 of the "I"-shaped structure serves as an internal PE line for independent evacuation of the internal fault current of the entire busbar trunking when a single phase ground occurs. Each phase busbar conductor 5 is wound with ceramic mica tape 7 for mutual insulation and isolation between phase conductors, which is waterproof and resistant to high temperature. An insulating layer with a thickness of 1-7mm is formed on each phase conductor, which is waterproof and resistant to high temperature of 950℃. On the outer side wall of the front side plate 3 and the rear side plate 4, multiple vertically placed semi-circular reinforcing ribs 8 are evenly installed along the length direction to increase the strength of the front side plate 3 or the rear side plate 4, ensuring that the busbar trunking has high mechanical strength. The top cover plate 1, the bottom cover plate 2, the front side plate 3 and the rear side plate 4 together form the outer shell PE line for evacuation of the fault current of the outer shell when a single phase ground occurs. The outer shell PE line and the internal PE line together form a "Y"-shaped inverted double busbar PE shell protection structure.

[0029] Continue as Figures 1 to 5 As shown, the top cover plate 1 and the bottom sealing plate 2 are folded at both ends to form a "ㄩ"-shaped platform structure for easy heat dissipation. The ends of the top cover plate 1, the bottom sealing plate 2, the front side plate 3 and the rear side plate 4 are also provided with L-shaped aluminum-magnesium alloy side plates 9 for sealing the end side covers, angle iron plates 10 for end docking and locking, and connecting screws 11. At the docking end faces of the L-shaped aluminum-magnesium alloy side plates 9 with the front side plate 3 and the rear side plate 4, L-shaped sealing strips 12 for sealing are also provided. The corners of the L-shaped aluminum-magnesium alloy side plates 9 are recessed and have a curved groove 90 for fastening and fixing the L-shaped sealing strip 12. The corners of the L-shaped aluminum-magnesium alloy side plates 9 are correspondingly provided with a round convex ridge 120 that cooperates with the curved groove.

[0030] In this embodiment, the outer shell PE wire and the internal PE wire jointly form a double-busbar PE shell protection联体 structure in the shape of an inverted "曰", greatly improving the safety of the busbar; ceramic mica tapes 7 are wound around each phase busbar conductor 5 corresponding to the four-phase busbar conductor 5, which can withstand high temperatures above 1000 degrees, enabling each phase busbar conductor 5 to be both high-temperature resistant and waterproof, completely solving the problem of fire-fighting power consumption; the structure of the L-shaped aluminum-magnesium alloy auxiliary side plate 9 can reduce the space volume at the end, is more conducive to heat dissipation at the end, and can cooperate with the L-shaped sealing strip 12 to greatly improve the waterproofness of the busbar.

[0031] The above-described embodiments are only preferred embodiments of the present invention, and do not limit the scope of implementation of the present invention. Any equivalent changes made according to the shape, structure, and principle of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A mineral-resistant refractory busbar trunking with integrated shell and insulation, used for the insulation and enclosure protection of conductive busbars, characterized in that... It includes a top cover plate, a bottom sealing plate, a front side plate, a rear side plate and a four-phase busbar conductor. The top cover plate and the bottom sealing plate are respectively disposed on the top side and the bottom side of the four-phase busbar conductor for sealing the upper and lower sides, and the front side plate and the rear side plate are respectively disposed on the front side and the rear side of the four-phase busbar conductor for sealing the front and rear sides; In the middle of the inner sides of the top cover plate and the bottom sealing plate, there is an inner partition plate extending along the height direction between the top cover plate and the bottom sealing plate. The inner partition plate and the top cover plate or the bottom sealing plate respectively form a "T" - shaped structure. The top cover plate and the bottom sealing plate are formed by docking a pair of vertically symmetric "T" - shaped structures to form an "I" - shaped structure that divides the four-phase busbar conductor into two parts front and back. The inner partition plates on the "I" - shaped structure corresponding to the middle parts of the four-phase busbar conductor front and back are used as internal PE lines for independent evacuation of the accident current inside the entire busway housing when single-phase is grounded; On each phase busbar conductor corresponding to the four-phase busbar conductor, there is a ceramic mica tape wound respectively for mutual insulation, isolation, waterproofing and high-temperature resistance; The top cover plate, the bottom sealing plate, the front side plate and the rear side plate jointly form an outer shell PE line for evacuating the accident current of the outer shell when single-phase is grounded. The outer shell PE line and the internal PE line jointly form a double-busbar PE shell protection joint structure in the shape of an inverted "曰"; 2. The integrated shell-protection mineral refractory busbar trunking according to claim 1, characterized in that: Both ends of the top cover plate and the bottom sealing plate are respectively folded to form a "凵" - shaped platform structure for facilitating heat dissipation; 3. The integrated shell-protection mineral refractory busbar trunking according to claim 1, characterized in that: At the end joints of the top cover plate, the bottom sealing plate, the front side plate and the rear side plate, there are respectively L-shaped aluminum-magnesium alloy attached side plates for sealing the end side edges, angle iron plates for end docking and locking connection, and connecting screws; 4. The integrated shell-protection mineral refractory busbar trunking according to claim 3, characterized in that: At the butt joint end faces of the L-shaped aluminum-magnesium alloy attached side plates and the front side plate and the rear side plate respectively, there are L-shaped sealing strips for sealing connection; 5. The integrated shell-protection mineral refractory busbar trunking according to claim 4, characterized in that: At the corner of the L-shaped aluminum-magnesium alloy attached side plate, there is a concave-shaped excellent arc groove for embedding and fixing the L-shaped sealing strip. Corresponding to the corner of the L-shaped sealing strip, there is a convex circular edge for cooperating with the excellent arc groove; 6. The integrated shell-protection mineral refractory busbar trunking according to claim 1, characterized in that: On the outer side walls of the front side plate and the rear side plate, there are also a plurality of semi-circular reinforcing ribs vertically placed and evenly installed along the length direction for increasing the strength of the front side plate or the rear side plate; 7. The integrated shell-protection mineral refractory busbar trunking according to claim 1, characterized in that: The front side plate and its extended and connected inner partition plate, and the rear side plate and its extended and connected inner partition plate are all integrally made of environmentally friendly color-coated steel plates;

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