Shell protection integrated mineral fireproof bus duct connector

Abstract

The invention discloses a shell protection integrated mineral fireproof bus duct connector which comprises a front side plate, four groups of connecting conductors and a rear side plate which are arranged pairwise, four groups of connecting conductors which are adjacent pairwise, and four groups of photo groups which are formed in pairs and are respectively and mutually conducted with phases of bus duct body busbars on two sides, a convex ceramic insulating block is sleeved at the center of each photo group; insulating phase separation plates are respectively arranged between the inner side surfaces of the front side plate and the rear side plate and the adjacent connecting conductors and between every two adjacent photo groups; a PE grounding busbar is arranged in the center of the bus duct body, and a PE connecting sheet used for conducting and connecting the PE grounding busbar inserted into the two sides is arranged in the middle of the sheet group; and the insulating partition plate adopts a mica plate subjected to waterproof treatment, so that the insulating partition plate is resistant to high temperature and waterproof, the insulating performance between the busbar and the connecting conductor and the stability of electrical connection are improved, and the reliability of the connector is effectively improved.

Description

[Technical field]

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

[0002] With the development of science and technology, bus duct, as an important equipment in the power system, has become a development trend to replace the existing cables. It plays an important role in the transmission and distribution of electricity. Bus duct is a closed metal device composed of copper and aluminum busbars, which is used to distribute large power to each component of the distributed system. The bus duct system is a power distribution device that efficiently transmits current. It has increasingly replaced wires and cables in indoor low-voltage power transmission trunk engineering projects. The connector of the bus duct is used to connect the bus duct body units and units. It is an important functional component for connecting the bus duct. The industry generally refers to it as a connector. The bus duct connector in the prior art includes two connector side plates, a plurality of insulating partitions located between the two connector side plates, and a connecting conductor is arranged between two adjacent insulating partitions. The busbar in the busbar corresponding to the end of the bus duct can be inserted between two adjacent connecting conductors. During installation, the connector side plates, all insulating partitions and all connecting conductors are penetrated by fastening bolts, so that the connector side plates, insulating partitions and connecting conductors are locked as a whole.

[0003] However, the assembly structure of the existing bus duct connector has problems such as low connection stability due to the single insulating plate structure, the insulating plate around the conductive bar 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 bus duct in the power usage environment, the existing bus duct 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, further exacerbating 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 insulating material and the shell structure will also affect the temperature control of the connector.

[0005] In particular, the bus ducts and connectors used in the existing fire distribution lines need to withstand 950-degree flame conditions and provide continuous power supply for 180 minutes; however, the existing bus ducts and bus duct connectors at home and abroad are not easy to disassemble and assemble and can withstand 950-degree flame conditions and provide continuous power supply for 180 minutes due to their substandard structural layout, connection methods and materials. Moreover, most of the current bus ducts have an external insulation layer on the connector or ceramic silicon mud is poured at the connector. Due to poor heat resistance and waterproof performance, and the inability to disassemble and assemble quickly, the connector cannot withstand 950-degree flame conditions for 180 minutes, causing insulation failure at the connector, resulting in heating of the connector, and then a short circuit, causing a power outage in the entire power transmission trunk line. [Summary of the invention]

[0006] The shell-protected integrated mineral fire-resistant bus duct 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, so that the insulating partition can withstand a high temperature of 950 degrees and is waterproof, which completely solves the problem of fire-fighting electricity, 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-protection integrated mineral fire-resistant bus duct connector is used for conducting connection of two busbars of mutually docked bus duct bodies and mutual insulation isolation between adjacent busbars, including a front side plate, four groups of connecting conductors arranged in pairs, and a rear side plate, 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 connected to the busbars inserted between the two connecting conductors of the bus duct bodies on both sides;

[0009] At least one set of torque bolts are 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 of the bus duct body 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-by-two adjacent connecting conductors are symmetrically arranged and each group is connected to each other, and are paired to form four groups of phase groups that are connected to each phase of the bus duct body busbars on both sides, and a convex ceramic insulating block is respectively installed in the center of each group of the phase groups to insulate and isolate the two-by-two adjacent phase groups and the inner side surface of the front side plate and the inner side surface of the rear side plate, and the torque bolt is installed through the sleeve in 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 surface of the front side plate and the inner side surface of the rear side plate and the adjacent connecting conductors, and between the 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 arranged 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 the two sides and symmetrically arranged are arranged in the middle of the four groups of phase plates for conducting and connecting the PE grounding busbars inserted on both sides; a group of two PE connecting plates is also provided with a "middle"-shaped ceramic insulating block in the center, which is horizontally placed 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 pads with a crescent-shaped cross section, which are sleeved on the torque bolts and installed symmetrically front and back, are further arranged 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 plates corresponding to the adjacent photo groups, and the convex part of the center of the crescent-shaped square spring steel pad is arranged away from the insulating phase-isolating plates;

[0014] An anti-rotation positioning block is also provided between the crescent-shaped 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-shaped 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 set 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 be matched 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 that cooperates with the two side edges of the crescent square spring steel pad to prevent the crescent square spring steel pad from circumferential rotation is formed between the two limiting edges;

[0016] 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 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 front-to-back symmetrical crescent-shaped spring steel pads and the anti-rotation positioning blocks to achieve an elastic self-tensioning locking connection between the front side plate and the rear side plate.

[0017] Preferably, a ceramic tile gasket is further arranged 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 phase group, and the center of the ceramic tile gasket is sleeved and installed on the convex ceramic insulating block corresponding to the adjacent phase group;

[0018] 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 respectively arranged 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. The convex part of the center of the crescent-shaped square spring steel washers is arranged away from the ceramic tile gasket.

[0019] An anti-rotation sheet is also provided between the crescent-shaped spring steel pad and the ceramic tile gasket, which is used to limit the circumferential position of the crescent-shaped spring steel pad and to prevent the torque bolt from rotating and receiving an unbalanced force when being tightened;

[0020] When the torque bolt and the torque nut 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, the elastic self-tensioning locking connection between the front side plate and the rear side plate is achieved by applying elastic self-tensioning force to the overlaps between 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 front and rear crescent-shaped spring steel pads and the anti-rotation plate.

[0021] Preferably, the anti-rotation sheet has folded portions extending from the upper and lower centers thereof to form a ceramic tile clamping edge for clamping and fixing the ceramic tile gasket from the upper and lower sides, and the corresponding ceramic tile gasket has recesses on the upper and lower sides thereof to form clamping grooves matching the ceramic tile clamping edge.

[0022] Preferably, the left and right side 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 or wrong insertion. The corresponding inner side surfaces of the front side panel and the inner side surfaces of the rear side panel are provided with limit grooves that cooperate with the two flange guide limits on both sides.

[0023] Preferably, 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 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 arc radius of curvature 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 immersed in an insulating resin and waterproofed to form a waterproof layer on the surface, and is waterproof and resistant to high temperatures of 950° C. The insulating plate has 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 insulating phase-isolating plate on the adjacent side.

[0027] Preferably, four convex ceramic insulating blocks are symmetrically arranged 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 butted against each other end to end to form a boss-shaped structure that is plugged into each other, and the other end opposite to the boss column of each silicone insulating block is recessed 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 at 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 plate, the crescent-shaped spring steel pads 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 plate are locked from the front and back sides. The two crescent-shaped spring steel pads and anti-rotation plates or anti-rotation positioning blocks symmetrically arranged in the front and back sides apply elastic self-tensioning force to the overlap 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 plate and the rear side plate, effectively ensuring that the locking pressure at the overlap between the bus duct body busbar and the connecting conductor is sufficient and the force is concentrated, thereby effectively improving the reliability of the connector installation connection.

[0031] In view of the problem that the existing insulating phase-isolating board is not waterproof and easily absorbs moisture, which will cause the insulation to be too low after connection, the insulating phase-isolating board adopts waterproof mica board, and the surface of the mica board is soaked with insulating resin for waterproof treatment, so that the insulating phase-isolating board can withstand high temperature of 950 degrees and is waterproof, which completely solves the problem of fire-fighting electricity; moreover, the insulating phase-isolating board and the front side plate or the rear side plate are fixed and insulated with ceramic tile gaskets. The ceramic material can withstand high temperature 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 conductor and the stability of the electrical connection.

[0032] Preferably, a pair of crescent-shaped square spring steel pads with a crescent-shaped cross section, which are sleeved on the torque bolts and installed symmetrically front and back, are further arranged 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 plates corresponding to the adjacent photo groups, and the convex part of the center of the crescent-shaped square spring steel pad is arranged away from the insulating phase-isolating plates;

[0033] An anti-rotation positioning block is also provided between the crescent-shaped 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-shaped 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 set 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 be matched 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 that cooperates with the two side edges of the crescent square spring steel pad to prevent the crescent square spring steel pad from circumferential rotation is formed between the two limiting edges;

[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 overlapped 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 front-to-back 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 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 wrong insertion, and a clamping groove that cooperates with the two side edges of the crescent square spring steel pad to prevent the crescent square spring steel pad from circumferential rotation is formed between the two limiting edges; or when an anti-rotation sheet is used, the left and right side edges of the anti-rotation sheet are respectively extended by folding edges that 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 that are clamped and matched with the two sides of the square crescent square spring steel pad are protruded on the left and right sides of the anti-rotation sheet. 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, and the overlap between the PE connecting sheet and 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 head and tail are butted together to form a mutually inserted connection structure; moreover, in order to solve the butt gap problem that may be caused by the use of a ceramic insulating block 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, thereby effectively avoiding the gap during installation and connection; when the connection is locked 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, thereby effectively improving the reliability of the connection between the conductor and the busbar 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 It 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 It is a schematic diagram of the explosion structure of the first embodiment of the present invention;

[0040] Figure 3 is an enlarged longitudinal section schematic diagram 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 6It is an enlarged schematic diagram of the explosion structure of the square crescent square spring steel pad, the square anti-rotation sheet and the ceramic tile pad when assembled from the front view in the first embodiment of the present invention;

[0044] Figure 7 It is an enlarged schematic diagram of the exploded structure of the square crescent square spring steel pad, the square anti-rotation sheet and the ceramic tile pad when assembled from the rear view in the first embodiment of the present invention;

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

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

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

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

[0049] Fig.12 It is a schematic diagram of a partial explosion structure of the second embodiment of the present invention;

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

[0051] Fig.14 is an enlarged longitudinal section schematic diagram of the connector in the second embodiment of the present invention;

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

[0053] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work 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, so once an item is defined in one drawing, it does not need to be further defined and 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, which 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 operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0055] Embodiment 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, and the front side plate 1, the four groups of connecting conductors 2 and the rear side plate 3 are stacked and locked to conduct with the busbars of the bus duct bodies on both sides, and the threaded ends of the torque bolts 4 are connected to torque nuts 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 plates are connected and paired to form four groups that are mutually conductive with the busbars of the bus duct body on both sides. In the center of each phase plate group, there is a convex ceramic insulating block 6 that is insulated and isolated between the phase plates adjacent to each other 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; waterproof and high-temperature resistant insulating phase-isolating plates 7 that are used for mutual insulation and isolation between the phase plates corresponding to the busbars of the bus duct body are respectively 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 connecting conductors 2, and between the phase plates adjacent to each other.

[0057] Continue as Figures 1 to 9As shown, a PE grounding busbar d is arranged at the center of the bus duct body (a, b), and a group of two PE connecting plates 8 located between the insulating phase-isolating plates 7 adjacent to both sides and symmetrically arranged for the PE grounding busbar d inserted on both sides are arranged in the middle of the corresponding four phase groups. A "middle"-shaped ceramic insulating block 9 is also set in the center of a group of two PE connecting plates 8, which is horizontally placed in a "middle" shape 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 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 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 , Fig.10 As shown, a pair of crescent-shaped cross-section crescent-shaped square spring steel pads 11 are respectively arranged 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 sleeved on the torque bolt 4 and installed symmetrically in front and back. The protruding part of the center of the crescent-shaped square spring steel pad 11 is arranged away from the ceramic tile gasket 10. The outer contour of the crescent-shaped square spring steel pad 11 is square, and the curvature radius of the arc surface of the crescent-shaped square spring steel pad 11 is 35 mm and The thickness is 2 to 5 mm; an anti-rotation sheet 12 is also provided between the crescent-shaped square spring steel pad 11 and the ceramic tile gasket 10 for limiting the circumferential position of the crescent-shaped square spring steel pad 11 and for preventing the torque bolt 4 from rotating and being subjected to unbalanced force when tightened; the folds extending from the upper and lower centers of the anti-rotation sheet 12 are provided with a ceramic tile clamping edge 120 for clamping and fixing the ceramic tile gasket 10 from the upper and lower sides, and the corresponding ceramic tile gasket 10 is provided with a clamping groove 100 matching the ceramic tile clamping edge 120. The folds extending from the left and right edges of the anti-rotation sheet 12 are provided with flanges 121 matching the inner side surface of the adjacent front side plate 1 or the inner side surface of the rear side plate 3, and used for guiding the front side plate 1 or the rear side plate 3 to prevent deviation and wrong insertion, and the corresponding inner side surfaces of the front side plate 1 and the rear side plate 3 are provided with limiting grooves 13 matching the two flanges 121 on both sides for guiding 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 sheet 12, which are engaged with the two sides of the crescent-shaped square spring steel pad 11 and are used to prevent the crescent-shaped 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 the insulating resin soaking on the surface of the mica board for waterproofing treatment, so that the insulating phase-isolating plate 7 can withstand a high temperature of 950 degrees and can be waterproof, which completely solves the problem of fire-fighting electricity; and, the insulating phase-isolating plate 7 is fixed and insulated with a ceramic tile gasket 10 between the front side plate 1 or the rear side plate 3, and the ceramic material used in the ceramic tile gasket 10 can withstand high temperatures above 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 the torque nuts 5 lock the front side plate 1, the crescent square spring steel pads 11, the anti-rotation sheet 12, the ceramic tile pads 10, 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-tension is applied between the two bus duct bodies (a, b), the 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 crescent square spring steel pads 11 and the anti-rotation sheet 12. At the same time, since the two square crescent square spring steel pads 11 are symmetrically arranged, the elastic self-tension is applied between the two bus duct bodies (a, b), the busbars c, the PE grounding busbar d, the 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 overlapped 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 busbar 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, thereby 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 Fig. 9 As shown, sealing strips 14 for sealingly connecting with adjacent insulating phase-isolating plates 7 are provided at 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, and 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 mounted 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 to 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 columns 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 provided at the centers of both the "middle"-shaped ceramic insulating block 9 and the convex ceramic insulating block 6.

[0063] Embodiment 2

[0064] As Figures 11 to 15 shown, the only difference between this embodiment and Embodiment 1 is that a pair of crescent-shaped square spring steel pads 11 with a crescent cross-section, which are sleeved on the torque bolts 4 and symmetrically installed front and back, are further provided between the inner side surface of the front side plate 1 and the inner side surface of the rear side plate 3 and the insulating phase-separating plates 7 corresponding to the adjacent photo groups. 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 insulating phase-separating plate 7 corresponding to the adjacent 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 when tightened and being subjected to unbalanced forces. 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 adaptive adjustment and contact between the anti-rotation positioning block 12' and 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 axially extended to be matched 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 of the limiting edges 120'. The inner side surfaces of the corresponding front side plate 1 and the rear side plate 3 are provided with limiting grooves 13 that are guiding and limitingly matched 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 to prevent the circumferential rotation of the crescent-shaped square spring steel pad 11 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 overlapped parts of the two bus duct bodies (a, b), the busbars c, the PE grounding busbar d, the two PE connecting plates 8 and the multiple groups of connecting conductors 2 through the two crescent-shaped spring steel pads 11 and the anti-rotation positioning block 12' that are symmetrical in the front and rear directions, 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-shaped square spring steel pad 11 is made of elastic steel sheet, and two square crescent-shaped square spring steel pads 11 are symmetrically arranged, the elastic clamping force of the two square crescent-shaped square spring steel pads 11 is all pressed on the plug-in place of the bus duct body busbar and the connecting conductor 2, which can not only effectively improve the clamping force of the crescent-shaped square spring steel pad 11, but also ensure that the torque bolts 4 of the bus duct are not loose during the use of the bus duct, 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 only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. All equivalent changes made based on the shape, structure and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The shell-protected integrated mineral fire-resistant bus duct connector is used for conducting connection between two busbars of mutually docked bus duct bodies and mutual insulation isolation between adjacent busbars, characterized in that: It comprises a front side plate, four groups of connecting conductors arranged in pairs and a rear side plate, wherein a plurality of groups of connecting conductors are arranged between the front side plate and the rear side plate in a front-to-back stacked manner, and each group is conductively connected to a busbar inserted between two connecting conductors of a bus duct body on both sides; At least one set of torque bolts are 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 of the bus duct body 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-by-two adjacent connecting conductors are symmetrically arranged and each group is connected to each other, and are paired to form four groups of photo groups that are connected to each other with each phase of the bus duct body busbar on both sides and are waterproof and high temperature resistant. In the center of each group of the photo groups, a convex ceramic insulating block is respectively installed to insulate and isolate the two-by-two adjacent photo groups and the inner side surface of the front side plate and the inner side surface of the rear side plate. The torque bolt is installed through the sleeve in the center of each convex ceramic insulating block. Waterproof and high temperature resistant insulating phase isolation plates are respectively provided between the inner side surface of the front side plate and the inner side surface of the rear side plate and the adjacent connecting conductors, and between the 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 arranged 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 both sides and symmetrically arranged are arranged in the middle of the four groups of phase plates for conducting and connecting the PE grounding busbars inserted on both sides; a group of two PE connecting plates is also provided with a "Z"-shaped ceramic insulating block in the center, which is horizontally placed 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 the sleeve.

2. The shell-protection integrated mineral fire-resistant bus duct connector according to claim 1, characterized in that: A pair of crescent-shaped square spring steel pads with a crescent-shaped cross section are 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 plates corresponding to the adjacent photo groups, respectively, and are sleeved on the torque bolts and installed symmetrically in front and back. The protruding part of the center of the crescent-shaped square spring steel pad is arranged away from the insulating phase-isolating plates; An anti-rotation positioning block is also provided between the crescent-shaped 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-shaped 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 set 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; The left and right side edges of the anti-rotation positioning block are respectively extended along the axial direction to be matched 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 that cooperates with the two side edges of the crescent square spring steel pad to prevent the crescent square spring steel pad from circumferential rotation is formed between the two limiting edges; 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 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 front-to-back symmetrical crescent-shaped spring steel pads and the anti-rotation positioning blocks to achieve an elastic self-tensioning locking connection between the front side plate and the rear side plate.

3. The shell-protection integrated mineral fire-resistant bus duct connector according to claim 1, characterized in that: Ceramic tile gaskets are also arranged 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 center of the ceramic tile gasket is sleeved and installed on the convex ceramic insulating block corresponding to the adjacent photo group; 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 respectively arranged 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. The convex part of the center of the crescent-shaped square spring steel washers is arranged away from the ceramic tile gasket. An anti-rotation sheet is also provided between the crescent-shaped spring steel pad and the ceramic tile gasket, which is used to limit the circumferential position of the crescent-shaped spring steel pad and to prevent the torque bolt from rotating and receiving an unbalanced force when being tightened; When the torque bolt and the torque nut 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, the elastic self-tensioning locking connection between the front side plate and the rear side plate is achieved by applying elastic self-tensioning force to the overlaps between 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 front and rear crescent-shaped spring steel pads and the anti-rotation plate.

4. The shell-protection integrated mineral fire-resistant bus duct connector according to claim 3, characterized in that: The anti-rotation sheet has folded edges extending from the upper and lower centers thereof to fix the ceramic tile gasket from the upper and lower sides, and correspondingly, the upper and lower recesses of the ceramic tile gasket are provided with slots matching the ceramic tile edges.

5. The shell-protection integrated mineral fire-resistant bus duct connector according to claim 3, characterized in that: The left and right side edges of the anti-rotation plate are respectively extended with folded settings 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 or wrong insertion. The corresponding inner side surfaces of the front side panel and the inner side surfaces of the rear side panel are provided with limit grooves that cooperate with the two flange guide limit stops on both sides.

6. The shell-protection integrated mineral fire-resistant bus duct connector according to claim 5, 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.

7. The shell-protection integrated mineral fire-resistant bus duct connector according to claim 3, characterized in that: The outer contour of the crescent square spring steel pad is a square, and the arc radius of curvature of the crescent square spring steel pad is 35mm and the thickness is 2-5mm; 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.

8. The shell-protection integrated mineral fire-resistant bus duct connector 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, and is waterproof and resistant to high temperatures of 950° C. The insulating plate has a thickness of 1 to 7 mm.

9. The shell-protection integrated mineral fire-resistant bus duct connector according to claim 1, characterized in that: 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 contacts the insulating phase-isolating plate on the adjacent side.

10. The shell-protection integrated mineral fire-resistant bus duct connector according to claim 1, characterized in that: Four convex ceramic insulating blocks are symmetrically arranged on both sides of the "Zhong"-shaped ceramic insulating block. The four silicone insulating blocks and the middle "Zhong"-shaped ceramic insulating block are butted against each other 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 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.

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