Shell and mineral integrated mineral fire bus duct connector

Abstract

The shell-integrated mineral fire-resistant bus duct connector disclosed by the application comprises a front side plate, four groups of two-by-two arranged connecting conductors and a rear side plate, four groups of two-by-two adjacent connecting conductors, and a pair of groups of four groups of phase groups respectively in mutual conduction with bus duct body bus bars on both sides, a convex ceramic insulating block is respectively sleeved in the center of each group of phase groups; the inner side surfaces of the front side plate and the rear side plate are respectively provided with insulating phase isolation plates between the immediately adjacent connecting conductors and between the two-by-two adjacent phase groups; a PE grounding bus bar is arranged in the center of the bus duct body, a PE connecting piece for the insertion and conduction connection of the PE grounding bus bars on both sides is arranged in the middle of the phase group; the insulating phase isolation plate is a waterproof treated mica plate, which realizes that the insulating phase isolation plate is resistant to high temperature and waterproof, improves the insulation performance and electrical connection stability between the bus bars and the connecting conductors, and effectively improves the reliability of the connector.

Description

Technical field

[0001] The invention relates to a connection technology of a bus duct in a power cable, and in particular to a mineral fire-resistant bus duct connector with an integrated shell and protection. [Background Technology]

[0002] With the advancement of technology, busbar ducts, as a crucial component in power systems, have become a trend to replace existing cables. They play a crucial role in the transmission and distribution of electricity. Busbar ducts are enclosed metal structures composed of copper and aluminum busbars, used to distribute high power to various components in a distributed system. Busbar duct systems are highly efficient current distribution devices and have increasingly replaced wires and cables in indoor low-voltage power transmission trunk projects. Busbar duct connectors, commonly referred to as connectors in the industry, connect busbar duct units and are a crucial functional component for connecting busbars. Conventional busbar duct connectors include two connector side panels and multiple insulating partitions positioned between them. Connecting conductors are positioned between adjacent insulating partitions. The busbars corresponding to the busbars at the ends of the busbar duct can be inserted between adjacent connecting conductors. During installation, bolts are tightened through the connector side panels, all insulating partitions, and all connecting conductors, thereby securing the connector side panels, insulating partitions, and connecting conductors together.

[0003] However, the assembly structure of the existing busbar duct connector has problems such as low connection stability due to the single insulation board structure, the insulation board around the conductive bus is easily polarized, and the charged area is charged, resulting in poor insulation performance and poor wind and earthquake resistance. At the same time, due to the high temperature and fire resistance requirements of the power environment for the busbar duct, the existing busbar connector is difficult to meet the usage requirements.

[0004] There are many reasons for the excessive temperature of the bus duct connector. For example, when the power system is overloaded and exceeds the rated load capacity of the connector, the connector will overheat. For example, poor contact causes excessive temperature. Due to friction, vibration and other reasons, the contact area between the bus duct and the connector will continue to decrease, resulting in poor contact, which in turn increases the resistance of the bus duct and further aggravates the overheating phenomenon caused by temperature rise. Environmental factors also cause the connector temperature to be too high, and the material quality of the connector will also affect its high temperature resistance. For example, the low copper content of the copper busbar will lead to high resistance, thereby increasing the temperature rise. In addition, the heat dissipation performance of the insulation material and the shell structure will also affect the temperature control of the connector.

[0005] In particular, the busbars and connectors used in existing fire protection power distribution lines are required to withstand 950-degree flame conditions and provide continuous power for 180 minutes. However, existing busbars and busbar connectors, both domestically and internationally, lack the structural layout, connection methods, and material quality standards to ensure easy assembly and disassembly while also withstanding 950-degree flame conditions and maintaining continuous power for 180 minutes. Furthermore, most current busbars feature connectors sealed with an insulating layer or filled with ceramic silica slurry. Due to their poor heat and water resistance and the inability to quickly assemble and disassemble, the connectors are unable to withstand 950-degree flame conditions for 180 minutes. This results in insulation failure, heating of the connectors, and consequently, a short circuit, causing a power outage along the entire power transmission trunk line. [Summary of the invention]

[0006] The shell-protected integrated mineral fire-resistant busbar connector provided by the present invention adopts a waterproof mica board as the insulating partition, and the surface of the mica board is soaked in insulating resin for waterproofing. The insulating partition is made to be resistant to high temperatures of 950 degrees and waterproof, which completely solves the problem of fire-fighting electricity use, improves the insulation performance between the busbar and the connecting conductor and the stability of the electrical connection, and effectively improves the reliability of the connector.

[0007] The technical solution adopted by the present invention to solve its technical problem is:

[0008] The shell-protected integrated mineral fire-resistant busbar connector is used for conducting connection between the busbars of two mutually docked busbar bodies and for mutual insulation isolation between adjacent busbars. It includes a front side plate, four groups of connecting conductors arranged in pairs, and a rear side plate. Multiple groups of connecting conductors are stacked front and back and arranged between the front side plate and the rear side plate, and each group is connected to the busbars inserted between the two connecting conductors of the busbar bodies on both sides.

[0009] At least one set of torque bolts is installed on the front side plate, the multiple sets of connecting conductors and the rear side plate from front to back, which are used to connect the front side plate, the multiple sets of connecting conductors and the rear side plate to the busbars on both sides after being stacked and locked, and the threaded ends of the torque bolts are connected to torque nuts;

[0010] Four groups of two adjacent connecting conductors are symmetrically arranged and each group is electrically connected to each other, and are paired to form four groups of photo groups that are electrically connected to each phase of the bus duct body busbar on both sides. A convex ceramic insulating block is respectively installed in the center of each group of the photo groups to insulate between the two adjacent photo groups and the inner side surfaces of the front side plate and the inner side surfaces of the rear side plate. The torque bolt is installed through the center of each convex ceramic insulating block;

[0011] Waterproof and high-temperature resistant insulating phase isolation plates are respectively provided between the inner side surfaces of the front side plate and the inner side surfaces of the rear side plate and the adjacent connecting conductors, and between two adjacent phase groups, for insulating and isolating the phase groups corresponding to the busbars of the bus duct body;

[0012] A PE grounding busbar is provided at the center of the bus duct body, and a group of two PE connecting plates located between the insulating phase-isolating plates adjacent to each other on both sides are provided in the middle of the corresponding four groups of phase plates, and two symmetrically arranged PE connecting plates are used for conducting connection of the PE grounding busbars inserted on both sides. A group of two PE connecting plates is also provided with a "Zhong"-shaped ceramic insulating block in the center, which is placed horizontally and docked with the convex ceramic insulating blocks on both sides for insulation isolation and the installation of the torque bolts.

[0013] Preferably, a pair of crescent-shaped square spring steel washers with a crescent-shaped cross-section, which are sleeved on the torque bolts and installed symmetrically front and back, are further provided between the inner side surfaces of the front side plate and the inner side surfaces of the rear side plate and the insulating phase-isolating plates corresponding to the adjacent photo groups, respectively. The protruding portion of the center of the crescent-shaped square spring steel washers is arranged away from the insulating phase-isolating plates;

[0014] An anti-rotation positioning block is also provided between the crescent square spring steel pad and the insulating phase-isolating plate corresponding to the adjacent photo group, which is used to limit the circumferential position of the crescent square spring steel pad and to prevent rotation and unbalanced force when the torque bolt is tightened. The center of the anti-rotation positioning block is sleeved and installed on the convex ceramic insulating block corresponding to the adjacent photo group. The corresponding center of the anti-rotation positioning block is provided with a square silicone pad that is nested with the center of the convex ceramic insulating block to facilitate the elastic adaptive adjustment of the anti-rotation positioning block and the insulating phase-isolating plate on the adjacent side;

[0015] The left and right side edges of the anti-rotation positioning block are respectively extended along the axial direction to cooperate with the adjacent inner side surface of the front side plate or the inner side surface of the rear side plate, and are used for guiding the front side plate or the rear side plate to prevent deviation and wrong insertion. The corresponding inner side surface of the front side plate and the inner side surface of the rear side plate are provided with limiting grooves that cooperate with the two limiting edges on both sides for guiding and limiting. A clamping groove is formed between the two limiting edges to cooperate with the two side edges of the crescent square spring steel pad to prevent the crescent square spring steel pad from circumferential rotation;

[0016] When the torque bolt and the torque nut lock the front side plate, the crescent square spring steel pad, the anti-rotation positioning block, the multiple convex ceramic insulating blocks, the multiple insulating phase-isolating plates, the multiple groups of connecting conductors and the rear side plate from the front and rear sides, the elastic self-tensioning locking connection between the front side plate and the rear side plate is achieved by applying elastic self-tensioning force between the two bus duct body busbars, the PE grounding busbar, the two PE connecting plates and the overlapping parts of the multiple groups of connecting conductors through the two symmetrical crescent square spring steel pads and the anti-rotation positioning blocks.

[0017] Preferably, a ceramic tile gasket is further provided between the inner side surface of the front side plate and the inner side surface of the rear side plate and the insulating phase-isolating plate corresponding to the adjacent photo group, and the center of the ceramic tile gasket is sleeved and installed on the convex ceramic insulating block corresponding to the adjacent photo group;

[0018] A pair of crescent-shaped square spring steel washers with crescent-shaped cross-sections are respectively provided between the inner side surface of the front side plate and the corresponding ceramic tile gasket, and between the inner side surface of the rear side plate and the corresponding ceramic tile gasket, and are sleeved on the torque bolts and installed symmetrically front and back. The protruding portion of the center of the crescent-shaped square spring steel washers is arranged away from the ceramic tile gaskets.

[0019] An anti-rotation sheet is provided between the crescent-shaped spring steel washer and the ceramic tile washer to limit the circumferential position of the crescent-shaped spring steel washer and to prevent the torque bolt from rotating and receiving an unbalanced force when tightened.

[0020] When the torque bolts and the torque nuts lock the front side plate, the crescent-shaped spring steel pad, the anti-rotation plate, the ceramic tile pad, the multiple convex ceramic insulating blocks, the multiple insulating phase-isolating plates, the multiple groups of connecting conductors and the rear side plate from the front and rear sides, elastic self-tensioning force is applied between the overlapping parts of the two bus duct body busbars, the PE grounding busbar, the two PE connecting plates and the multiple groups of connecting conductors through the two symmetrical crescent-shaped spring steel pads and the anti-rotation plate to achieve an elastic self-tensioning locking connection between the front side plate and the rear side plate.

[0021] Preferably, the anti-rotation plate is provided with ceramic tile clamping edges extending from the upper and lower centers respectively, and the corresponding ceramic tile gaskets are provided with clamping grooves matching the ceramic tile clamping edges.

[0022] Preferably, the left and right edges of the anti-rotation plate are respectively extended with folds that cooperate with the adjacent inner side surface of the front side panel or the inner side surface of the rear side panel, and are used to guide the front side panel or the rear side panel to prevent deviation and incorrect insertion. The corresponding inner side surface of the front side panel and the inner side surface of the rear side panel are provided with limit grooves that cooperate with the two flange guide limits on both sides.

[0023] Preferably, outer edges of the limiting grooves on both sides of the inner sides of the front side plate and the rear side plate are provided with sealing strips for fitting and sealingly connecting with the adjacent insulating phase isolation plates.

[0024] Preferably, the outer contour of the crescent square spring steel pad is a square, and the curvature radius of the arc surface of the crescent square spring steel pad is 35 mm and the thickness is 2 to 5 mm; the left and right sides of the anti-rotation plate are also protruding with two clamping strips that are engaged with the two sides of the crescent square spring steel pad to prevent the crescent square spring steel pad from rotating circumferentially.

[0025] Preferably, the insulating phase-isolating plate is a mica plate soaked in insulating resin and waterproofed to form a waterproof layer on the surface, and is waterproof and resistant to high temperatures of 950° C., with a thickness of 1 to 7 mm.

[0026] Preferably, a square silicone gasket is disposed on the rear side of each convex ceramic insulating block, which is located in the connection hole at the center of the connecting conductor and is sleeved on the center of the convex ceramic insulating block and in contact with the adjacent insulating phase-isolating plate.

[0027] Preferably, four symmetrically arranged convex ceramic insulating blocks are mounted on both sides of the "Zhong"-shaped ceramic insulating block, and the four silicone insulating blocks and the middle "Zhong"-shaped ceramic insulating block are docked and fitted together end to end to form a boss-shaped structure that is plugged into each other. The other end of the boss column of each silicone insulating block is recessed and provided with a groove that cooperates with the boss column adjacent to the silicone insulating block, or the boss columns on both sides of the "Zhong"-shaped ceramic insulating block.

[0028] Preferably, a circular through hole for fitting with a torque bolt is provided in the center of each of the "Z"-shaped ceramic insulating block and the convex ceramic insulating block.

[0029] The beneficial effects of the present invention are:

[0030] Through torque bolts and torque nuts, the front side plates, the crescent-shaped spring steel washers and anti-rotation plates or anti-rotation positioning blocks on the front and back sides, multiple convex ceramic insulating blocks and multiple insulating phase-isolating plates, multiple groups of connecting conductors and the rear side plates are locked from the front and back sides. The two symmetrical crescent-shaped spring steel washers and anti-rotation plates or anti-rotation positioning blocks on the front and back sides apply elastic self-tensioning force to the joints between the two bus duct body busbars, the PE grounding busbar, the two PE connecting plates and the multiple groups of connecting conductors to achieve an elastic self-tensioning locking connection between the front side plates and the rear side plates, effectively ensuring that the locking pressure at the joints between the bus duct body busbar and the connecting conductors is sufficient and the force is concentrated, thereby effectively improving the reliability of the connector installation connection.

[0031] In order to solve the problem that the existing insulating phase-isolating boards are not waterproof and easily absorb moisture, which will cause the insulation to be too low after connection, the insulating phase-isolating boards use waterproof mica boards, and the surface of the mica boards is soaked in insulating resin for waterproofing. This makes the insulating phase-isolating boards both resistant to high temperatures of 950 degrees and waterproof, completely solving the problem of fire-fighting electricity. Moreover, ceramic tile gaskets are used to fix and insulate the insulating phase-isolating boards and the front or rear side panels. The ceramic material can withstand high temperatures of more than 1000 degrees and is waterproof and moisture-proof. The two insulating connection structures simultaneously improve the insulation performance between the busbar and the connecting conductors and the stability of the electrical connection.

[0032] Preferably, a pair of crescent-shaped square spring steel washers with a crescent-shaped cross-section, which are sleeved on the torque bolts and installed symmetrically front and back, are further provided between the inner side surfaces of the front side plate and the inner side surfaces of the rear side plate and the insulating phase-isolating plates corresponding to the adjacent photo groups, respectively. The protruding portion of the center of the crescent-shaped square spring steel washers is arranged away from the insulating phase-isolating plates;

[0033] An anti-rotation positioning block is also provided between the crescent square spring steel pad and the insulating phase-isolating plate corresponding to the adjacent photo group, which is used to limit the circumferential position of the crescent square spring steel pad and to prevent rotation and unbalanced force when the torque bolt is tightened. The center of the anti-rotation positioning block is sleeved and installed on the convex ceramic insulating block corresponding to the adjacent photo group. The corresponding center of the anti-rotation positioning block is provided with a square silicone pad that is nested with the center of the convex ceramic insulating block to facilitate the elastic adaptive adjustment of the anti-rotation positioning block and the insulating phase-isolating plate on the adjacent side;

[0034] The left and right side edges of the anti-rotation positioning block are respectively extended along the axial direction to cooperate with the adjacent inner side surface of the front side plate or the inner side surface of the rear side plate, and are used for guiding the front side plate or the rear side plate to prevent deviation and wrong insertion. The corresponding inner side surface of the front side plate and the inner side surface of the rear side plate are provided with limiting grooves that cooperate with the two limiting edges on both sides for guiding and limiting. A clamping groove is formed between the two limiting edges to cooperate with the two side edges of the crescent square spring steel pad to prevent the crescent square spring steel pad from circumferential rotation;

[0035] When the torque bolts and the torque nuts lock the front side plate, the crescent-shaped spring steel pad, the anti-rotation positioning block, the multiple convex ceramic insulating blocks, the multiple insulating phase-isolating plates, the multiple groups of connecting conductors and the rear side plate from the front and rear sides, elastic self-tensioning force is applied between the two bus duct body busbars, the PE grounding busbar, the two PE connecting plates and the overlapping parts of the multiple groups of connecting conductors through the two symmetrical crescent-shaped spring steel pads and the anti-rotation plates to achieve an elastic self-tensioning locking connection between the front side plate and the rear side plate.

[0036] In addition, the left and right edges of the anti-rotation positioning block are respectively extended axially to cooperate with the adjacent inner side surface of the front side plate or the inner side surface of the rear side plate, and are used to guide the front side plate or the rear side plate to prevent deviation and wrong insertion, and a clamping groove is formed between the two limiting edges to cooperate with the two side edges of the crescent square spring steel pad to prevent the crescent square spring steel pad from circumferential rotation; or when an anti-rotation plate is used, the left and right edges of the anti-rotation plate are respectively extended by folding edges to cooperate with the adjacent inner side surface of the front side plate or the inner side surface of the rear side plate; the outer contour of the crescent square spring steel pad is square, and two clamping strips are protruded on the left and right sides of the anti-rotation plate to clamp and cooperate with the two sides of the square crescent square spring steel pad. The above structures cooperate effectively, so that the limiting edges or clamping strips on both sides effectively prevent the crescent square spring steel pad from circumferential rotation, so that the locking force between the front side plate and the rear side plate is symmetrically and concentratedly distributed on the connecting conductors on both sides of the torque bolt, the PE connecting plate and the overlap of each phase busbar and the PE grounding busbar, further improving the connection reliability of the connector.

[0037] At the same time, the "Zhong"-shaped ceramic insulating block and the convex ceramic insulating block are both made of insulating ceramic materials. The four ceramic insulating blocks are symmetrically arranged on both sides of the middle "Zhong"-shaped ceramic insulating block, and the ends are butted together to form a mutually inserted connection structure; moreover, in order to solve the butt joint gap problem that may be caused by the use of ceramic insulating blocks in the center, a square silicone gasket is installed between the center of the convex ceramic insulating block and the adjacent insulating phase-isolating plate to facilitate the sealing connection between them, effectively avoiding the gap during installation and connection; when the connection is tightened by the torque bolt, it can ensure that the torque bolts of the bus duct will not loosen when the bus duct is in use, effectively improving the reliability of the connection between the conductors and the busbars of each phase between the front side plate and the rear side plate, and effectively achieving insulation isolation for the torque bolts.

Brief Description of the Drawings

[0038] Figure 1 This is a schematic diagram of the exploded structure when the bus duct and the connector are matched in the first embodiment of the present invention;

[0039] Figure 2 This is a schematic diagram of the explosion structure of the first embodiment of the present invention;

[0040] Figure 3 is an enlarged longitudinal cross-sectional view of the connector in the first embodiment of the present invention;

[0041] Figure 4 Figure 3 A magnified schematic diagram of the middle part;

[0042] Figure 5 is an enlarged cross-sectional schematic diagram of the connector in the first embodiment of the present invention;

[0043] Figure 6This is an enlarged schematic diagram of the exploded structure of the square crescent square spring steel washer, square anti-rotation plate and ceramic tile gasket when assembled from the front in Example 1 of the present invention;

[0044] Figure 7 This is an enlarged schematic diagram of the exploded structure of the square crescent square spring steel washer, square anti-rotation plate and ceramic tile gasket when assembled from the rear view in Example 1 of the present invention;

[0045] Figure 8 This is a schematic diagram of the exploded structure of the connector in the first embodiment of the present invention;

[0046] Figure 9 1 is a schematic diagram of the three-dimensional structure of the connector in the first embodiment of the present invention;

[0047] Figure 10 Schematic diagram of the cross-sectional structure of the crescent-shaped spring steel pad in the first embodiment of the present invention;

[0048] Figure 11 This is a schematic diagram of the exploded structure of the bus duct and the connector when they are matched in the second embodiment of the present invention;

[0049] Figure 12 This is a schematic diagram of a partial explosion structure of the second embodiment of the present invention;

[0050] Figure 13 is an enlarged cross-sectional schematic diagram of the connector in the second embodiment of the present invention;

[0051] Figure 14 is an enlarged longitudinal cross-sectional view of the connector in the second embodiment of the present invention;

[0052] Figure 15 It is an enlarged schematic diagram of the explosion structure when the square crescent square spring steel pad, square silicone pad and ceramic tile gasket are assembled in the second embodiment of the present invention. [Specific implementation method]

[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0054] It should be noted that similar numbers and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. In the description of the present invention, it should be noted that the terms "left", "right", "front", "rear", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, or the directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0055] Example 1

[0056] The shell-protected mineral fire-resistant bus duct connector is used for the conductive connection of the busbars c of two mutually connected bus duct bodies (a, b) and the mutual insulation isolation between adjacent busbars c, such as Figures 1 to 9 As shown, it includes a front side plate 1, four groups of connecting conductors 2 arranged in pairs and a rear side plate 3, the four groups of connecting conductors 2 are arranged between the front side plate 1 and the rear side plate 3 in a front-to-back manner, and each group is connected to the busbar c inserted between the two connecting conductors 2 of the bus duct bodies (a, b) on both sides; a group of torque bolts 4 are installed on the front side plate 1, the four groups of connecting conductors 2 and the rear side plate 3 from front to back, which are connected to the busbars of the bus duct bodies on both sides after the front side plate 1, the four groups of connecting conductors 2 and the rear side plate 3 are stacked and locked, and the threaded end of the torque bolt 4 is connected to a torque nut 5; the four groups of connecting conductors 2 adjacent to each other are symmetrically arranged and each group is respectively connected to each other The phase groups are conductively connected and paired to form four groups that are conductively connected to the busbar body busbars on both sides. In the center of each group of phase groups, there is a convex ceramic insulating block 6 that is insulated and isolated between the two adjacent phase groups and the inner side surfaces of the front side plate 1 and the inner side surfaces of the rear side plate 3. The torque bolt 4 is installed through the center of each convex ceramic insulating block 6; between the inner side surfaces of the front side plate 1 and the inner side surfaces of the rear side plate 3 and the adjacent connecting conductors 2, and between the two adjacent phase groups, there are respectively provided with waterproof and high-temperature resistant insulating phase-isolating plates 7 for insulating and isolating the phase groups corresponding to the busbar body busbar.

[0057] Continue as Figures 1 to 9As shown, a PE grounding busbar d is provided in the center of the bus duct body (a, b), and a group of two PE connecting plates 8 are provided in the middle of the corresponding four phase groups, which are located between the insulating phase-isolating plates 7 adjacent to each other on both sides, and the two symmetrically arranged PE connecting plates 8 are used for conductive connection of the PE grounding busbar d inserted on both sides. A group of two PE connecting plates 8 is also provided with a "middle"-shaped ceramic insulating block 9 in the center, which is placed horizontally and docked with the convex ceramic insulating blocks 6 on both sides for insulation isolation and torque bolt 4 sleeve installation; ceramic tile gaskets 10 are also provided between the inner side surfaces of the front side plate 1 and the inner side surfaces of the rear side plate 3 and the insulating phase-isolating plates 7 corresponding to the adjacent phase groups, and the center of the ceramic tile gasket 10 is sleeved and installed on the convex ceramic insulating block 6 corresponding to the adjacent phase group.

[0058] like Figures 1 to 7 、 Figure 10 As shown, a pair of crescent-shaped crescent square spring steel pads 11 with a crescent-shaped cross section are respectively provided between the inner side surface of the front side plate 1 and the corresponding ceramic tile gasket 10, and between the inner side surface of the rear side plate 3 and the corresponding ceramic tile gasket 10, which are respectively mounted on the torque bolt 4 and symmetrically installed front and back. The protruding part of the center of the crescent square spring steel pad 11 is away from the ceramic tile gasket 10. The outer contour of the crescent square spring steel pad 11 is square, and the curvature radius of the arc surface of the crescent square spring steel pad 11 is 35 mm and The thickness is 2 to 5 mm. An anti-rotation plate 12 is provided between the crescent-shaped spring steel washer 11 and the ceramic tile gasket 10 to limit the circumferential position of the crescent-shaped spring steel washer 11 and to prevent the torque bolt 4 from rotating and receiving an unbalanced force when being tightened. The anti-rotation plate 12 has a ceramic tile clamping edge 120 extending from the upper and lower centers of the anti-rotation plate 12 for clamping and fixing the ceramic tile gasket 10 from the upper and lower sides. The corresponding ceramic tile gasket 10 has a clamping groove 100 on the upper and lower sides that cooperates with the ceramic tile clamping edge 120. The anti-rotation plate 12 has a flange 121 extending from the left and right edges that cooperates with the inner side surface of the adjacent front side panel 1 or the inner side surface of the rear side panel 3 to guide the front side panel 1 or the rear side panel 3 to prevent deviation or incorrect insertion. The corresponding inner side surfaces of the front side panel 1 and the inner side surfaces of the rear side panel 3 are provided with a limiting groove 13 that cooperates with the two flanges 121 on both sides for guidance and limiting.

[0059] Continue as Figures 1 to 7As shown, two clamping strips 122 are protruding on the left and right sides of the anti-rotation plate 12, which are engaged with the two sides of the crescent square spring steel pad 11 to prevent the crescent square spring steel pad 11 from rotating circumferentially; the insulating phase-isolating plate 7 is an insulating plate with a thickness of 1 to 7 mm, which is a mica board immersed in an insulating resin for waterproofing treatment to form a waterproof layer on the surface, and is waterproof and resistant to high temperatures of 950°C, and the thickness of the insulating phase-isolating plate 7 is preferably 2 mm; that is, the insulating phase-isolating plate 7 adopts an insulating resin soaking treatment on the surface of the mica board to achieve waterproofing, so that the insulating phase-isolating plate 7 can withstand high temperatures of 950 degrees and is waterproof, which completely solves the problem of fire-fighting electricity; moreover, a ceramic tile gasket 10 is used to fix and insulate the insulating phase-isolating plate 7 and the front side plate 1 or the rear side plate 3. The ceramic material used in the ceramic tile gasket 10 can withstand high temperatures of more than 1000 degrees and is waterproof and moisture-proof; the two insulating connection structures simultaneously improve the insulation performance and electrical connection stability between the busbar and the connecting conductor 2.

[0060] When the torque bolts 4 and torque nuts 5 lock the front side plate 1, crescent square spring steel pads 11, anti-rotation plates 12, ceramic tile pads 10, multiple convex ceramic insulating blocks 6, multiple insulating phase isolation plates 7, multiple groups of connecting conductors 2 and the rear side plate 3 from the front and rear sides, elastic self-tension is applied between the two bus duct bodies (a, b) busbars c, PE grounding busbar d, two PE connecting plates 8 and the overlapping parts of the multiple groups of connecting conductors 2 through the two symmetrical crescent square spring steel pads 11 and anti-rotation plates 12. At the same time, due to the symmetrical arrangement of the two square crescent square spring steel pads 11, the elastic self-tension is applied between the two bus duct bodies (a, b) busbars c, PE grounding busbar d, two PE connecting plates 8 and the multiple groups of connecting conductors 2. In the installation method, the elastic clamping force of the two crescent-shaped spring steel pads 11 is all concentrated on the left and right sides of the connection between the busbar c of the bus duct body and the connecting conductor 2, that is, the middle position where the busbars of the two bus duct bodies overlap and are connected with the connecting conductor 2. The locking point can be controlled in a targeted manner, and the clamping force of the crescent-shaped spring steel pads 11 is effectively increased, so that the force between the busbars and the connecting conductor 2 is greater, and the locking is more firm and reliable, ensuring that the torque bolts 4 of the bus duct are not loose when the bus duct is in use, and realizing the elastic self-tensioning locking connection between the front side plate 1 and the rear side plate 3.

[0061] like Figures 1 to 4 、 Figure 8 and Figure 9 As shown, sealing strips 14 for sealingly connecting with adjacent insulating phase-isolating plates 7 are provided on the outer edges of the limiting grooves 13 on both sides of the inner sides of the front side plate 1 and the rear side plate 3. A square silicone gasket 15 is provided on the rear side of each convex ceramic insulating block 6, which is located in the connection hole at the center of the connecting conductor 2 and is fitted in the center of the convex ceramic insulating block 6 and in contact with the adjacent insulating phase-isolating plate 7.

[0062] like Figures 1 to 4As shown, in this embodiment, four symmetrically arranged convex ceramic insulating blocks 6 are sleeved on both sides of the "middle"-shaped ceramic insulating block 9. The four silicone insulating blocks and the middle "middle"-shaped ceramic insulating block 9 are butt-jointed end to end and form a convex platform structure connected by inserting into each other. At the opposite end of the convex platform column of each silicone insulating block, there is a concave groove that cooperates with the convex platform column adjacent to the silicone insulating block or the convex platform column on both sides of the "middle"-shaped ceramic insulating block 9; circular through holes that are sleeved and matched with the torque bolts 4 are opened at the centers of the "middle"-shaped ceramic insulating block 9 and the convex ceramic insulating block 6.

[0063] Embodiment Two

[0064] As Figures 11 to 15 shown, the only difference between this embodiment and Embodiment One is that a pair of crescent-shaped square spring steel pads 11 with a crescent cross-section are further arranged between the inner side surfaces of the front side plate 1 and the inner side surfaces of the rear side plate 3 and the adjacent insulating phase-separating plates 7 corresponding to the photo group. The pair of crescent-shaped square spring steel pads 11 are sleeved on the torque bolts 4 and symmetrically installed front and back. The protruding part at the center of the crescent-shaped square spring steel pad 11 is arranged away from the insulating phase-separating plate 7; between the crescent-shaped square spring steel pad 11 and the adjacent insulating phase-separating plate 7 corresponding to the photo group, there is also an anti-rotation positioning block 12' for circumferentially limiting the crescent-shaped square spring steel pad 11 and preventing the torque bolt 4 from rotating and being stressed unevenly when tightened. The center of the anti-rotation positioning block 12' is sleeved and installed on the convex ceramic insulating block 6 corresponding to the adjacent photo group. A square silicone pad 10' that is nested and matched with the center of the convex ceramic insulating block is sleeved at the center of the corresponding anti-rotation positioning block 12' to facilitate the elastic self-adaptive adjustment and contact of the anti-rotation positioning block 12' with the adjacent insulating phase-separating plate 7.

[0065] Continuing as Figures 11 to 15 shown, the left and right side edges of the anti-rotation positioning block 12' are respectively extended axially to cooperate with the inner side surface of the adjacent front side plate 1 or the inner side surface of the rear side plate 3, and are used for guiding the front side plate 1 or the rear side plate 3 to prevent misinsertion and incorrect insertion. Limiting edges 120' are provided. Corresponding limiting grooves 13 are provided on the inner side surfaces of the front side plate 1 and the inner side surface of the rear side plate 3 for guiding and limiting cooperation with the two limiting edges 12' on both sides. A clamping groove 121' that cooperates with the two side edges of the crescent-shaped square spring steel pad 11 and prevents the crescent-shaped square spring steel pad 11 from rotating circumferentially is formed between the two limiting edges 120'.

[0066] In this embodiment, when the torque bolts 4 and the torque nuts 5 lock the front side plate 1, the crescent-shaped spring steel pad 11, the anti-rotation positioning block 12', the multiple convex ceramic insulating blocks 6, the multiple insulating phase-isolating plates 7, the multiple groups of connecting conductors 2 and the rear side plate 3 from the front and rear sides, elastic self-tensioning force is applied between the two bus duct bodies (a, b) busbars c, the PE grounding busbar d, the two PE connecting plates 8 and the overlapping parts of the multiple groups of connecting conductors 2 through the two symmetrical front and rear two crescent-shaped spring steel pads 11 and the anti-rotation positioning block 12', thereby realizing an elastic self-tensioning locking connection between the front side plate 1 and the rear side plate 3.

[0067] In the above embodiment, since the crescent square spring steel pad 11 is made of elastic steel sheet, and two square crescent square spring steel pads 11 are symmetrically arranged, the elastic pressing force of the two square crescent square spring steel pads 11 is all pressed on the plug-in position of the busbar body busbar and the connecting conductor 2, which can not only effectively improve the pressing force of the crescent square spring steel pad 11, but also ensure that the torque bolt 4 of the busbar is not loose during the use of the busbar, realize one-time installation and long-term maintenance-free operation, and effectively improve the reliability of the power transmission trunk line in the building electrical engineering.

[0068] The above-described embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Any equivalent changes made based on the shape, structure and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. The mineral fire-resistant bus duct connector with integrated shell and protection is used for conducting connection between two busbars of mutually docked bus duct bodies and mutual insulation isolation between adjacent busbars. It is characterized by: It includes a front side plate, four groups of connecting conductors arranged in pairs, and a rear side plate, wherein multiple groups of connecting conductors are arranged between the front side plate and the rear side plate in a front-to-back stack, and each group is conductively connected to the busbars inserted between the two connecting conductors on both sides of the bus duct body; At least one set of torque bolts is installed on the front side plate, the multiple sets of connecting conductors and the rear side plate from front to back, which are used to connect the front side plate, the multiple sets of connecting conductors and the rear side plate to the busbars on both sides after being stacked and locked, and the threaded ends of the torque bolts are connected to torque nuts; Four groups of two adjacent connecting conductors are symmetrically arranged and each group is electrically connected to each other, and are paired to form four groups of photo groups that are electrically connected to each phase of the bus duct body busbar on both sides and are waterproof and high-temperature resistant. A convex ceramic insulating block is respectively installed in the center of each group of photo groups to insulate between the two adjacent photo groups and the inner side surfaces of the front side plate and the inner side surfaces of the rear side plate. The torque bolt is installed through the center of each convex ceramic insulating block; Waterproof and high-temperature resistant insulating phase isolation plates are respectively provided between the inner side surfaces of the front side plate and the inner side surfaces of the rear side plate and the adjacent connecting conductors, and between two adjacent phase groups, for insulating and isolating the phase groups corresponding to the busbars of the bus duct body; A PE grounding busbar is provided in the center of the bus duct body, and a group of two PE connecting plates located between the insulating phase-isolating plates adjacent to both sides and symmetrically arranged for conducting connection of the PE grounding busbars inserted on both sides are provided in the middle of the corresponding four groups of phase plates. A "Z"-shaped ceramic insulating block is also provided in the center of the two PE connecting plates, which is placed horizontally in a "Z" shape and docked with the convex ceramic insulating blocks on both sides for insulation isolation and the installation of the torque bolts through sleeves; The torque bolts and the torque nuts lock the front side plate, the crescent-shaped spring steel pad, the anti-rotation positioning block, the multiple convex ceramic insulating blocks, the multiple insulating phase-isolating plates, the multiple groups of connecting conductors and the rear side plate from the front and rear sides; The left and right side edges of the anti-rotation positioning block are respectively extended axially to form limiting edges that cooperate with the adjacent inner side surface of the front side plate or the inner side surface of the rear side plate, and are used to guide the front side plate or the rear side plate to prevent deviation and incorrect insertion. The corresponding inner side surface of the front side plate and the inner side surface of the rear side plate are provided with limiting grooves that cooperate with the two limiting edges on both sides for guiding and limiting. A clamping groove is formed between the two limiting edges to cooperate with the two side edges of the crescent square spring steel pad to prevent the crescent square spring steel pad from circumferential rotation.

2. The mineral fire-resistant bus duct connector with integrated shell and protection according to claim 1, characterized in that: A pair of crescent-shaped square spring steel washers with crescent-shaped cross-sections are provided between the inner side surfaces of the front side plate and the inner side surfaces of the rear side plate and the insulating phase-isolating plates corresponding to the adjacent photo groups, respectively, and are sleeved on the torque bolts and symmetrically installed front and back. The protruding portion of the center of the crescent-shaped square spring steel washers is provided away from the insulating phase-isolating plates; An anti-rotation positioning block is also provided between the crescent square spring steel pad and the insulating phase-isolating plate corresponding to the adjacent photo group, which is used to limit the circumferential position of the crescent square spring steel pad and to prevent rotation and unbalanced force when the torque bolt is tightened. The center of the anti-rotation positioning block is sleeved and installed on the convex ceramic insulating block corresponding to the adjacent photo group. The corresponding center of the anti-rotation positioning block is provided with a square silicone pad that is nested with the center of the convex ceramic insulating block to facilitate the elastic adaptive adjustment of the anti-rotation positioning block and the insulating phase-isolating plate on the adjacent side; By means of the two symmetrical crescent-shaped spring steel pads and anti-rotation positioning blocks, elastic self-tension is applied between the two bus duct body busbars, the PE grounding busbar, the two PE connecting plates and the overlapping parts of multiple groups of connecting conductors to achieve an elastic self-tensioning locking connection between the front side plate and the rear side plate.

3. The mineral fire-resistant bus duct connector with integrated shell and protection according to claim 1, characterized in that: The insulating phase-isolating plate is a mica plate immersed in an insulating resin and waterproofed to form a waterproof layer on the surface. The insulating plate is waterproof and resistant to high temperatures of 950° C. and has a thickness of 1 to 7 mm.

4. The mineral fire-resistant bus duct connector with integrated shell and protection according to claim 1, characterized in that: A square silicone gasket is disposed on the rear side of each convex ceramic insulating block. The gasket is located in the connection hole at the center of the connecting conductor and is sleeved on the center of the convex ceramic insulating block and contacts the adjacent insulating phase isolation plate.

5. The mineral fire-resistant bus duct connector with integrated shell and protection according to claim 1, characterized in that: Four symmetrically arranged convex ceramic insulating blocks are set on both sides of the "Zhong"-shaped ceramic insulating block. The four convex ceramic insulating blocks and the middle "Zhong"-shaped ceramic insulating block are docked and embedded with each other end to end to form a boss-shaped structure that is plugged into each other. The other end opposite to the boss column of each convex ceramic insulating block is recessed and provided with a groove that cooperates with the boss column of the adjacent convex ceramic insulating block, or with the boss columns on both sides of the "Zhong"-shaped ceramic insulating block.

6. The mineral fire-resistant bus duct connector with integrated shell and protection is used for conducting the connection between the busbars of two mutually docked bus duct bodies and for mutual insulation isolation between adjacent busbars. It is characterized by: It includes a front side plate, four groups of connecting conductors arranged in pairs, and a rear side plate, wherein multiple groups of connecting conductors are arranged between the front side plate and the rear side plate in a front-to-back stack, and each group is conductively connected to the busbars inserted between the two connecting conductors on both sides of the bus duct body; At least one set of torque bolts is installed on the front side plate, the multiple sets of connecting conductors and the rear side plate from front to back, which are used to connect the front side plate, the multiple sets of connecting conductors and the rear side plate to the busbars on both sides after being stacked and locked, and the threaded ends of the torque bolts are connected to torque nuts; Four groups of two adjacent connecting conductors are symmetrically arranged and each group is electrically connected to each other, and are paired to form four groups of photo groups that are electrically connected to each phase of the bus duct body busbar on both sides and are waterproof and high-temperature resistant. A convex ceramic insulating block is respectively installed in the center of each group of photo groups to insulate between the two adjacent photo groups and the inner side surfaces of the front side plate and the inner side surfaces of the rear side plate. The torque bolt is installed through the center of each convex ceramic insulating block; Waterproof and high-temperature resistant insulating phase isolation plates are respectively provided between the inner side surfaces of the front side plate and the inner side surfaces of the rear side plate and the adjacent connecting conductors, and between two adjacent phase groups, for insulating and isolating the phase groups corresponding to the busbars of the bus duct body; A PE grounding busbar is provided in the center of the bus duct body, and a group of two PE connecting plates located between the insulating phase-isolating plates adjacent to both sides and symmetrically arranged for conducting connection of the PE grounding busbars inserted on both sides are provided in the middle of the corresponding four groups of phase plates. A "Z"-shaped ceramic insulating block is also provided in the center of the two PE connecting plates, which is placed horizontally in a "Z" shape and docked with the convex ceramic insulating blocks on both sides for insulation isolation and the installation of the torque bolts through sleeves; The torque bolts and the torque nuts lock the front side plate, the crescent-shaped spring steel washer, the anti-rotation plate, the ceramic tile washer, the multiple convex ceramic insulating blocks, the multiple insulating phase isolation plates, the multiple groups of connecting conductors and the rear side plate from the front and rear sides; An anti-rotation sheet is provided between the crescent-shaped spring steel washer and the ceramic tile washer to limit the circumferential position of the crescent-shaped spring steel washer and to prevent the torque bolt from rotating and receiving an unbalanced force when tightened. The anti-rotation plate is provided with ceramic tile clamping edges integrally extending from the upper and lower centers of the anti-rotation plate for clamping and fixing the ceramic tile gasket from the upper and lower sides; the anti-rotation plate is provided with flanges extending from the left and right edges for cooperating with the inner side surface of the adjacent front side plate or the inner side surface of the rear side plate to guide the front side plate or the rear side plate to prevent deviation or incorrect insertion; Two clamping strips are protruding from the left and right sides of the anti-rotation piece and are engaged with the two sides of the crescent square spring steel pad to prevent the crescent square spring steel pad from rotating circumferentially.

7. The mineral fire-resistant bus duct connector with integrated shell and protection according to claim 6, characterized in that: Ceramic tile gaskets are further provided between the inner side surfaces of the front side plate and the inner side surfaces of the rear side plate and the insulating phase-isolating plates corresponding to the adjacent photo groups, and the centers of the ceramic tile gaskets are sleeved and installed on the convex ceramic insulating blocks corresponding to the adjacent photo groups; A pair of crescent-shaped square spring steel washers with crescent-shaped cross-sections are respectively provided between the inner side surface of the front side plate and the corresponding ceramic tile gasket, and between the inner side surface of the rear side plate and the corresponding ceramic tile gasket, and are sleeved on the torque bolts and installed symmetrically front and back. The protruding portion of the center of the crescent-shaped square spring steel washers is arranged away from the ceramic tile gaskets. By means of the two symmetrical crescent-shaped spring steel pads and anti-rotation plates, elastic self-tension is applied between the two bus duct body busbars, the PE grounding busbar, the two PE connecting plates and the overlapping parts of multiple groups of connecting conductors to achieve an elastic self-tensioning locking connection between the front side plate and the rear side plate.

8. The mineral fire-resistant bus duct connector with integrated shell and protection according to claim 6, characterized in that: The upper and lower sides of the ceramic tile gasket are recessed to form card slots that match the ceramic tile card edges.

9. The mineral fire-resistant bus duct connector with integrated shell and protection according to claim 6, characterized in that: The inner side surface of the front side plate and the inner side surface of the rear side plate are provided with limiting grooves that cooperate with the two flange guide limits on both sides.

10. The mineral fire-resistant bus duct connector with integrated shell and protection according to claim 9, characterized in that: The outer edges of the limiting grooves on both sides of the inner sides of the front side plate and the rear side plate are provided with sealing strips for fitting and sealing connection with the adjacent insulating phase isolation plates.

11. The mineral fire-resistant bus duct connector with integrated shell and protection according to claim 6, characterized in that: The outer contour of the crescent square spring steel pad is a square, and the arc curvature radius of the crescent square spring steel pad is 35 mm and the thickness is 2~5 mm.

12. The mineral fire-resistant bus duct connector with integrated shell and protection according to claim 6, characterized in that: The insulating phase-isolating plate is a mica plate immersed in an insulating resin and waterproofed to form a waterproof layer on the surface. The insulating plate is waterproof and resistant to high temperatures of 950° C. and has a thickness of 1 to 7 mm.

13. The mineral fire-resistant bus duct connector with integrated shell and protection according to claim 6, characterized in that: A square silicone gasket is disposed on the rear side of each convex ceramic insulating block. The gasket is located in the connection hole at the center of the connecting conductor and is sleeved on the center of the convex ceramic insulating block and contacts the adjacent insulating phase isolation plate.

14. The mineral fire-resistant bus duct connector with integrated shell and protection according to claim 6, characterized in that: Four symmetrically arranged convex ceramic insulating blocks are set on both sides of the "Zhong"-shaped ceramic insulating block. The four convex ceramic insulating blocks and the middle "Zhong"-shaped ceramic insulating block are docked and embedded with each other end to end to form a boss-shaped structure that is plugged into each other. The other end opposite to the boss column of each convex ceramic insulating block is recessed and provided with a groove that cooperates with the boss column of the adjacent convex ceramic insulating block, or with the boss columns on both sides of the "Zhong"-shaped ceramic insulating block.

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