Bus duct plugging structure and bus duct

Abstract

The invention discloses a bus duct plugging structure and a bus duct, and the structure comprises a bus duct housing, the end part of the bus duct housing is provided with a protection housing, the two sides of one end of the protection housing are provided with positioning boxes, the two sides of the bus duct housing are provided with limiting assemblies, the positioning boxes are provided with positioning assemblies, and the two sides of the protection housing are provided with protection end covers. An abutting assembly convenient to adjust is arranged on the protective end cover; according to the invention, through the arrangement of the insulating partition plates and the electrical isolation between the abutting blocks and the bus copper bars, the risks of current leakage and short circuit are effectively prevented, the safety of the whole system is improved, and through the limiting clamping design between the protective end covers and the bus duct shell and the cooperative use of the reset springs and the air bags, the connection stability is ensured, and the service life is prolonged. According to the utility model, the structure is simple, the connection looseness caused by vibration or external force is prevented, the design of the rotating handle and the sliding block enables a user to easily adjust the contact pressure between the abutting block and the bus copper bar, meanwhile, the dismounting process becomes simple and rapid, and the operation convenience is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of bus ducts, and particularly to a bus duct plug-in structure and a bus duct. Background Technique

[0002] A bus duct is an enclosed metal device composed of copper and aluminum busbars, used to distribute relatively large power to each component of a decentralized system. In indoor low-voltage power transmission main line engineering projects, it has increasingly replaced wire and cable. As a transmission cable for transmitting electric wires, it can no longer meet the actual construction needs in a large-current transmission system. The parallel use of multiple cables will bring many inconveniences to on-site installation and construction connections. Therefore, the bus duct has become an indispensable wiring method in high-rise buildings, factories and other electrical equipment and power systems.

[0003] The existing plug-in structure has relatively single functions and lacks sufficient flexibility. This structure involves bringing two copper bars into contact with each other and then using bolts for fixation to achieve plug-in. In this way, there are easily gaps, resulting in unstable conductive contact of the bus duct, making it difficult to ensure the use effect of the bus duct. Moreover, when the user inspects and troubleshoots the internal wire arrangement of the bus duct, it is necessary to unscrew multiple screws to open the cover plate, which is a rather troublesome process and reduces the maintenance efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a bus duct plug-in structure and a bus duct to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A bus duct plug-in structure includes a bus duct housing. A protective shell is provided at the end of the bus duct housing. Positioning boxes are provided on both sides of one end of the protective shell. Limiting components are provided on both sides of the bus duct housing. A positioning component is provided on the positioning box. Protective end covers are provided on both sides of the protective shell. The protective end cover is in a "C" shape structure. A positioning square groove is provided at one end of the protective end cover. An abutting component that is convenient for adjustment is provided on the protective end cover.

[0006] Preferably, the limiting component includes a groove. A groove is opened on the bus duct housing. An installation square block is provided at the opening of the groove. An insertion block is slidably inserted into the installation square block.

[0007] Preferably, one end of the insertion block is in an inclined surface structure. A pulling strip is provided at the inner ends of multiple insertion blocks. A baffle is provided on one side of the pulling strip. A buckling groove is opened at the end of the pulling strip. A abutting spring is provided between the pulling strip and the groove.

[0008] Preferably, the positioning assembly includes a pulling rod, which is slidably inserted into the positioning box. A slot is provided on the inner side of the positioning box, and the slot and the insert block are correspondingly arranged. A limiting slider is provided at the end of the pulling rod, and a guide rod is provided on the positioning box.

[0009] Preferably, a positioning block is provided at one end of the limit slider, the end of the positioning block is an inclined surface structure, a support spring is sleeved on the pulling rod, and the limit slider is slidably sleeved on the guide rod.

[0010] Preferably, the abutment assembly includes an adjusting screw, a slide groove is opened on the inner side of the protective end cover, the adjusting screw is located in the slide groove and is rotatably connected to the protective end cover through a bearing, a slider is sleeved on the adjusting screw, and an abutment block is provided at the end of the slider.

[0011] Preferably, the slider is connected to the adjusting screw by internal and external threads, an insulating partition is provided on the inner side of the protective end cover, the abutment block and the insulating partition are arranged side by side between the busbar copper bar, a turning handle is provided at the end of the adjusting screw, a receiving groove is provided on the turning handle, a sliding slider is slidably inserted on the receiving groove, and an elastic member is provided between the sliding slider and the receiving groove.

[0012] Preferably, an annular block is provided on one side of the protective end cover, located on the outer side of the turning handle, and a limiting groove is provided on the annular block. There are multiple limiting grooves, and the multiple limiting grooves are distributed in a circle around the annular block. The end of the sliding slider is inserted into the limiting groove, and a cylinder is provided on the protective end cover at one end of the sliding groove. A mounting circular plate is provided at the opening of the cylinder, and an abutment rod is provided on the mounting circular plate. The original state between the end of the abutment rod and the abutment block is in abutment.

[0013] Preferably, a cylindrical airbag is arranged between the abutment rod and the inner side of the cylinder, a connecting tube is arranged at one end of the cylindrical airbag, an extension seat is arranged on one side of the protective end cover, the extension seat is in an "L"-shaped block structure, a receiving groove is provided on the extension seat, a fixed block is provided at the opening of the receiving groove, a sliding block is slidably inserted on the fixed block, a return spring is arranged between the sliding block and the receiving groove, a square airbag is arranged between one side of the sliding block and the fixed block, and the square airbag is connected to the connecting tube.

[0014] A bus duct comprises a bus duct shell and a protective shell. Busbar copper bars are arranged at both ends of the bus duct shell. The bus duct shell comprises a first bus duct shell and a second bus duct shell. The end busbar copper bars of the first bus duct shell and the second bus duct shell are arranged at intervals. The end protective shells of the first bus duct shell and the second bus duct shell are arranged at intervals. A positioning card slot is opened on the first bus duct shell, and the positioning card slot is correspondingly arranged with a sliding card block.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention effectively prevents the risk of current leakage and short circuit and improves the safety of the entire system by setting an insulating partition and electrical isolation between the abutment block and the busbar copper bar. The limit card connection design between the protective end cover and the busbar duct shell, as well as the coordinated use of the return spring and the airbag ensure the stability of the connection and prevent the loose connection caused by vibration or external force. The design of the turning handle and the sliding slider enables the user to easily adjust the contact pressure between the abutment block and the busbar copper bar. At the same time, the disassembly process also becomes simple and quick, which improves the convenience of operation.

[0016] 2. The present invention adopts the method of setting busbar copper bars and protective shells at intervals. When the current flows from one bus duct to another, the plug-in structure realizes efficient and stable current distribution and transmission. This design effectively overcomes the shortcomings of uneven current distribution and low transmission efficiency in the prior art, and significantly improves the operating efficiency of the power system.

[0017] 3. The present invention uses the ingenious design of the positioning box, the plug block, the abutment spring and other components to enable the positioning box and the protective shell to be quickly and conveniently positioned and fixed, which not only greatly simplifies the installation procedure, but also improves the installation efficiency, reduces the human errors that may occur during the installation process, and avoids the complexity of fixing with bolts to achieve plug-in.

[0018] 4. The protective end cover of the present invention is provided with an abutment component, which can achieve the clamping or loosening of the busbar copper bar by adjusting the cooperation of components such as the screw and the slider, thereby improving the mechanical stability of the bus duct. At the same time, through the design of the insulating partition, the electrical isolation between the busbar copper bars is achieved, effectively ensuring the safety during use and avoiding the generation of gaps that make the conductive contact of the bus duct unstable.

[0019] 5. The present invention can achieve fine adjustment between the abutment block and the abutment rod through the extension seat and the sliding block arranged on the protective end cover, through the cooperation of the reset spring and the airbag, thereby ensuring the precise docking between the protective end cover and the bus duct housing, and improving the installation accuracy of the entire bus duct system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the bus duct plug-in structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the structure of the busbar copper bar spacing arrangement of the present invention.

[0022] Figure 3 It is a schematic structural diagram of the bus duct body of the present invention.

[0023] Figure 4 It is a structural schematic diagram of the positioning slot of the present invention.

[0024] Figure 5It is a schematic structural diagram of the positioning box of the present invention.

[0025] Figure 6 It is a structural schematic diagram of the limiting component of the present invention.

[0026] Figure 7 It is a schematic structural diagram of the protective end cover of the present invention.

[0027] Figure 8 It is a cross-sectional view of the protective end cover of the present invention.

[0028] Fig. 9 For the present invention Figure 8 Schematic diagram of the structure enlarged at point A in the middle.

[0029] Fig.10 For the present invention Figure 8 Schematic diagram of the enlarged structure at point B.

[0030] Fig.11 It is a structural schematic diagram of the extension seat of the present invention.

[0031] Fig.12 For the present invention Fig.11 Schematic diagram of the enlarged structure at point C in the middle.

[0032] In the figure: bus duct housing 1; first bus duct housing 11; second bus duct housing 12; positioning card slot 13; bus copper bar 2; protective shell 3; positioning box 4; slot 41; pulling rod 42; positioning block 43; supporting spring 44; guide rod 45; limiting slider 46; protective end cover 5; positioning square slot 51; adjusting screw 52; turning handle 53; sliding slider 531; elastic member 532; slider 54; abutment block 55; insulating partition 56; groove 6; pulling bar block 61; baffle 62; mounting block 63; insert block 64; abutment spring 65; buckle groove 66; annular block 7; limiting slot 71; cylinder 8; mounting circular plate 81; abutment rod 82; cylindrical airbag 83; connecting pipe 84; extension seat 9; accommodating groove 91; fixing block 92; sliding card block 93; square airbag 94; reset spring 95. DETAILED DESCRIPTION

[0033] 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.

[0034] See also Figure 1 It is a structural schematic diagram of the bus duct plug-in structure of the present invention, Figure 2 This is a schematic diagram of the structure of the busbar copper bar spacing arrangement of the present invention. Figure 3 This is a schematic structural diagram of the busbar trunking body of the present invention. The present invention provides a technical solution: a busbar trunking plugging structure, which includes a busbar trunking housing 1. Both ends of the busbar trunking housing 1 are fixedly connected with busbar copper bars 2. A protective shell 3 is sleeved outside the busbar copper bars 2 at the end of the busbar trunking housing 1. On both sides of one end of the protective shell 3, positioning boxes 4 are fixedly connected. Protective end caps 5 are lapped on both sides of the protective shell 3. The protective end cap 5 is in a "C" - shaped structure, and a positioning square groove 51 is opened at one end of the protective end cap 5.

[0035] The busbar trunking housing 1 includes a first busbar trunking housing 11 and a second busbar trunking housing 12. The busbar copper bars 2 at the ends of the first busbar trunking housing 11 and the second busbar trunking housing 12 are arranged at intervals, and the protective shells 3 at the ends of the first busbar trunking housing 11 and the second busbar trunking housing 12 are arranged at intervals. When current flows from one busbar trunking to another, efficient and stable current distribution and transmission are achieved through the plugging structure.

[0036] Figure 6 This is a schematic structural diagram of the limiting component of the present invention. Limiting components are arranged on both sides of the busbar trunking housing 1. The limiting component includes a groove 6. The groove 6 is opened on the busbar trunking housing 1. An installation square block 63 is arranged at the opening of the groove 6. The installation square block 63 is fixed on the busbar trunking housing 1 by screws. A plug block 64 is slidably inserted into the installation square block 63. One end of the plug block 64 is in an inclined surface structure, and the inner ends of a plurality of plug blocks 64 are fixedly connected with a pulling strip 61.

[0037] A baffle 62 is fixedly connected to one side of the pulling strip 61. One end of the baffle 62 penetrates through the busbar trunking housing 1. A buckle groove 66 is opened at the end of the pulling strip 61. A contact spring 65 is fixedly connected between the pulling strip 61 and the groove 6. The model of the contact spring 65 can be selected according to the actual working conditions. A slot 41 is opened inside the positioning box 4, and the slot 41 and the plug block 64 are correspondingly arranged.

[0038] Press the protective shell 3 against the end of the busbar trunking housing 1, so that the positioning box 4 is slidably inserted into the track groove of the busbar trunking housing 1. At this time, the end face of the positioning box 4 presses the inclined surface at the end of the plug block 64, so that the end of the plug block 64 is pressed and accommodated into the groove 6. When the slot 41 corresponds to the end of the plug block 64, due to the elastic force of the contact spring 65, the end of the plug block 64 is inserted into the corresponding slot 41, realizing the positioning and fixing of the positioning box 4 and the protective shell 3, and the operation is convenient.

[0039] Figure 4 This is a schematic structural diagram of the positioning card slot of the present invention. Figure 5 This is a schematic structural diagram of the positioning box of the present invention. Figure 6This is a structural schematic diagram of the limit assembly of the present invention. The positioning box 4 is provided with a positioning assembly, and the positioning assembly includes a pulling rod 42, which is slidably inserted into the positioning box 4, and the end of the pulling rod 42 is fixedly connected to a limit slider 46, and one end of the limit slider 46 is fixedly connected to a positioning block 43, and the end of the positioning block 43 is an inclined surface structure, and the positioning square groove 51 is correspondingly arranged with the end of the positioning block 43, a guide rod 45 is fixedly connected to the positioning box 4, a support spring 44 is sleeved on the pulling rod 42, and the limit slider 46 is slidably sleeved on the guide rod 45.

[0040] The end busbar copper bars 2 of the first bus duct shell 11 and the second bus duct shell 12 are plugged into and contacted with each other, and then the protective end cover 5 is buckled on the protective shell 3. At this time, the two end faces of the protective end cover 5 slide on the end faces of the first bus duct shell 11 and the second bus duct shell 12 respectively, and the end face of the protective end cover 5 squeezes the end inclined surface of the positioning block 43, so that the end inclined surface of the positioning block 43 is compressed and accommodated in the positioning box 4. When the end of the positioning block 43 corresponds to the positioning square groove 51, due to the elastic force of the support spring 44, the end of the positioning block 43 is plugged into the corresponding positioning square groove 51, so as to realize the positioning of the protective end cover 5 on the positioning boxes 4 on both sides.

[0041] Figure 7 is a schematic diagram of the structure of the protective end cover of the present invention, Figure 8 is a cross-sectional view of the protective end cover of the present invention, Fig. 9 For the present invention Figure 8 In the structural schematic diagram enlarged at point A in the middle, an abutment assembly for easy adjustment is provided on the protective end cover 5, and the abutment assembly includes an adjusting screw 52. A slide groove is provided on the inner side of the protective end cover 5. The adjusting screw 52 is located in the slide groove and is rotatably connected to the protective end cover 5 through a bearing. A slider 54 is sleeved on the adjusting screw 52, ​​and an abutment block 55 is fixedly connected to the end of the slider 54. The abutment block 55 is an insulating layer structure for forming electrical isolation with the busbar copper bar 2. The slider 54 and the adjusting screw 52 are connected by internal and external threads. When the slider 54 moves, the abutment block 55 will move accordingly to achieve clamping or loosening of the busbar copper bar 2.

[0042] An insulating partition 56 is fixedly connected to the inner side of the protective end cover 5. The abutment block 55 and the insulating partition 56 are arranged side by side between the busbar copper bar 2. The insulating partition 56 is in contact with the busbar copper bar 2 of the second busbar duct shell 12. By rotating the adjusting screw 52, ​​the position of the slider 54 in the slide groove can be adjusted, thereby realizing the adjustment of the contact pressure between the abutment block 55 and the busbar copper bar 2.

[0043] The end of the adjusting screw 52 is fixedly connected to a turning handle 53, on which a receiving groove is provided, on which a sliding block 531 is slidably inserted, and an elastic member 532 is fixedly connected between the sliding block 531 and the receiving groove, and the elastic member 532 can be a spring. The setting of the turning handle 53 is used to facilitate the operator to rotate the adjusting screw 52. One side of the protective end cover 5 is located on the outer side of the turning handle 53 and is fixedly connected to an annular block 7, on which a limiting groove 71 is provided, and a plurality of limiting grooves 71 are provided, and the plurality of limiting grooves 71 are distributed in a circle around the annular block 7, and the end of the sliding block 531 is inserted into the limiting groove 71.

[0044] An elastic plug-in structure is formed between the elastic member 532 and the sliding block 531 , so that the end of the sliding block 531 is plugged into the corresponding limiting groove 71 , which is beneficial for preventing the adjusting screw 52 from rotating randomly after adjustment and maintaining the clamping force.

[0045] Fig. 9 For the present invention Figure 8 The enlarged structural diagram at A in the middle. Fig.10 For the present invention Figure 8 The enlarged structural diagram at B in the middle, Fig.11 It is a structural schematic diagram of the extension seat of the present invention. A cylinder 8 is fixedly inserted at one end of the slide groove on the protective end cover 5. A mounting circular plate 81 is provided at the opening of the cylinder 8. The mounting circular plate 81 is fixed to the cylinder 8 by screws. An abutment rod 82 is provided on the mounting circular plate 81. The end of the abutment rod 82 is originally in abutment with the abutment block 55. A cylindrical airbag 83 is bonded between the abutment rod 82 and the inner side of the cylinder 8. One end of the cylindrical airbag 83 is connected to a connecting pipe 84.

[0046] An extension seat 9 is fixedly connected to one side of the protective end cover 5. The extension seat 9 is an "L"-shaped block structure. The end of the extension seat 9 is arranged parallel to the cover plate of the protective end cover 5. A receiving groove 91 is provided on the extension seat 9. A fixing block 92 is provided at the opening of the receiving groove 91. The fixing block 92 is fixed to the extension seat 9 by screws. A sliding block 93 is slidably inserted on the fixing block 92. A positioning groove 13 is provided on the first bus duct shell 11, and the positioning groove 13 and the sliding block 93 are correspondingly arranged.

[0047] A return spring 95 is fixedly connected between the sliding block 93 and the accommodating groove 91. The return spring 95 provides elastic force so that the sliding block 93 can automatically return to its original position when there is no external force. A square air bag 94 is bonded between one side of the sliding block 93 and the fixed block 92. The square air bag 94 is connected to the connecting pipe 84. The model of the return spring 95 can be selected according to the actual working conditions. The elastic force of the return spring 95 is greater than the expansion force of the cylindrical air bag 83 and the square air bag 94 in the absence of other external forces. The function of the air bag is to change the position of the abutment rod 82 when it expands or compresses, thereby fine-tuning the position of the sliding block 93.

[0048] When the abutment block 55 moves, the abutment block 55 and the abutment rod 82 are separated from each other. At this time, the elastic force of the reset spring 95 abuts the sliding block 93, so that its end is inserted into the corresponding positioning slot 13, and the sliding block 93 squeezes the square airbag 94 to compress it. The gas in the square airbag 94 is transmitted to the cylindrical airbag 83 through the connecting pipe 84. The cylindrical airbag 83 expands and squeezes the abutment rod 82 to restore it to its initial position, thereby further realizing the limit clamping connection between the protective end cover 5 and the other bus duct shell 1 to ensure the stability of the installation.

[0049] During actual installation, the protective shell 3 is pressed against the end of the bus duct housing 1, so that the positioning box 4 is slidably inserted into the track groove of the bus duct housing 1. At this time, the end face of the positioning box 4 squeezes the inclined surface of the end of the plug block 64, so that the end of the plug block 64 is pressed and accommodated in the groove 6. When the slot 41 corresponds to the end of the plug block 64, due to the elastic force of the abutment spring 65, the end of the plug block 64 is inserted into the corresponding slot 41, so that the positioning box 4 and the protective shell 3 are positioned and fixed, and then the first bus duct is installed. The end busbar copper bars 2 of the housing 11 and the second bus duct housing 12 are plugged into and contacted with each other, and then the protective end cover 5 is buckled on the protective shell 3. At this time, the two end faces of the protective end cover 5 slide on the end faces of the first bus duct housing 11 and the second bus duct housing 12 respectively, and the end face of the protective end cover 5 squeezes the end inclined surface of the positioning block 43, so that the end inclined surface of the positioning block 43 is pressed and accommodated in the positioning box 4. When the end of the positioning block 43 corresponds to the positioning square groove 51, due to the elastic force of the support spring 44, By using it, the end of the positioning block 43 is inserted into the corresponding positioning square groove 51 to realize the positioning of the positioning box 4 on both sides of the protective end cover 5. By pressing the sliding slider 531, its end is accommodated in the storage groove, and the handle 53 is rotated to rotate the adjusting screw 52, ​​thereby moving the slider 54 in the slide groove, driving the contact pressure between the abutment block 55 and the busbar copper bar 2 to change. At the same time, the insulating partition 56 is in contact with the busbar copper bar 2 of the second busbar duct housing 12 to achieve electrical isolation. During the process, the abutment block 55 and the abutment rod 82 are separated from each other. At this time, the elastic force of the reset spring 95 abuts the sliding block 93, so that its end is inserted into the corresponding positioning slot 13, and the sliding block 93 squeezes the square airbag 94 to compress it. The gas in the square airbag 94 is transmitted to the cylindrical airbag 83 through the connecting pipe 84. The cylindrical airbag 83 expands and squeezes the abutment rod 82 to restore it to its initial position, thereby further realizing the limit clamping connection between the protective end cover 5 and the other bus duct shell 1 to ensure the stability of the installation.

[0050] When disassembling, by pressing the sliding slider 531, its end is accommodated in the storage groove, and rotating the handle 53 to rotate the adjusting screw 52, ​​thereby moving the slider 54 in the slide groove, driving the abutment block 55 and the busbar copper bar 2 to move away from each other. At this time, the abutment block 55 squeezes the abutment rod 82, and the abutment rod 82 compresses the cylindrical airbag 83. The gas in it is transmitted to the square airbag 94 through the connecting pipe 84 to expand and squeeze the sliding block 93 to move, so that the end of the sliding block 93 is away from the positioning slot 13, and the sliding slider 531 is released. Under the elastic force of the elastic member 532, the end of the sliding slider 531 is inserted into the corresponding limit slot 71, and then the pulling strip blocks 61 on both sides are pressed to make the slot 41 and the end of the insert block 64 move away from each other. Finally, the pulling rod 42 is pulled to make the positioning square slot 51 and the end of the positioning block 43 move away from each other, and the protective end cover 5, the protective shell 3 and the positioning box 4 can be disassembled respectively.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bus duct plug-in structure, comprising a bus duct housing (1), characterized in that: A protective shell (3) is provided at the end of the busbar trunking housing (1). Positioning boxes (4) are provided on both sides of one end of the protective shell (3). Limiting components are provided on both sides of the busbar trunking housing (1). The limiting components include grooves (6). Grooves (6) are formed on the busbar trunking housing (1). An installation square block (63) is provided at the opening of the groove (6). A plug block (64) is slidably inserted into the installation square block (63). One end of the plug block (64) is of an inclined surface structure. A pulling strip block (61) is provided at the inner ends of multiple plug blocks (64). A baffle (62) is provided on one side of the pulling strip block (61). A buckling groove (66) is formed at the end of the pulling strip block (61). A contact spring (65) is provided between the pulling strip block (61) and the groove (6). A positioning component is provided on the positioning box (4). The positioning component includes a pulling rod (42). The pulling rod (42) is slidably inserted into the positioning box (4). A slot (41) is formed inside the positioning box (4). The slot (41) and the plug block (64) are correspondingly arranged. A limiting slider (46) is provided at the end of the pulling rod (42). A guiding rod (45) is provided on the positioning box (4). Protective end covers (5) are provided on both sides of the protective shell (3). The protective end cover (5) is of a "C" - shaped structure. A positioning square groove (51) is provided at one end of the protective end cover (5). An abutting component for easy adjustment is provided on the protective end cover (5).

2. A bus duct plug-in structure according to claim 1, characterized in that: A positioning block (43) is provided at one end of the limiting slider (46). The end of the positioning block (43) is of an inclined surface structure. A support spring (44) is sleeved on the pulling rod (42). The limiting slider (46) is slidably sleeved on the guiding rod (45).

3. A bus duct plug-in structure according to claim 1, characterized in that: The abutting component includes an adjusting screw rod (52). A sliding groove is formed inside the protective end cover (5). The adjusting screw rod (52) is rotatably connected to the protective end cover (5) through a bearing in the sliding groove. A slider (54) is sleeved on the adjusting screw rod (52). An abutting block (55) is provided at the end of the slider (54).

4. A bus duct plug-in structure according to claim 3, characterized in that: The slider (54) is connected to the adjusting screw rod (52) through internal and external threads. An insulating partition (56) is provided inside the protective end cover (5). The abutting block (55) and the insulating partition (56) are arranged side by side with the busbar copper row (2). A rotating handle (53) is provided at the end of the adjusting screw rod (52). A storage groove is formed on the rotating handle (53). A sliding slider (531) is slidably inserted into the storage groove. An elastic member (532) is provided between the sliding slider (531) and the storage groove.

5. The bus duct plug-in structure according to claim 1, characterized in that: An annular block (7) is provided on one side of the protective end cover (5) and is located outside the rotating handle (53). A limiting groove (71) is provided on the annular block (7). A plurality of limiting grooves (71) are provided. The plurality of limiting grooves (71) are distributed in a circle around the annular block (7). The end of the sliding block (531) is inserted into the limiting groove (71). A cylinder (8) is provided on the protective end cover (5) and is located at one end of the sliding groove. A mounting circular plate (81) is provided at the opening of the cylinder (8). An abutment rod (82) is provided on the mounting circular plate (81). The end of the abutment rod (82) is in abutment with the abutment block (55) in an original state.

6. A bus duct plug-in structure according to claim 5, characterized in that: A cylindrical airbag (83) is arranged between the abutting rod (82) and the inner side of the cylinder (8), a connecting pipe (84) is arranged at one end of the cylindrical airbag (83), an extension seat (9) is arranged on one side of the protective end cover (5), the extension seat (9) is in an "L"-shaped block structure, a receiving groove (91) is provided on the extension seat (9), a fixing block (92) is arranged at the opening of the receiving groove (91), a sliding block (93) is slidably inserted on the fixing block (92), a return spring (95) is arranged between the sliding block (93) and the receiving groove (91), a square airbag (94) is arranged between one side of the sliding block (93) and the fixing block (92), and the square airbag (94) is connected to the connecting pipe (84).

7. A bus duct, comprising a bus duct housing (1) and a protective shell (3) in a bus duct plug-in structure according to any one of claims 1 to 6, characterized in that: Busbar copper bars (2) are arranged at both ends of the bus duct housing (1), and the bus duct housing (1) comprises a first bus duct housing (11) and a second bus duct housing (12), the busbar copper bars (2) at the ends of the first bus duct housing (11) and the second bus duct housing (12) are arranged at intervals, and the end protective shells (3) of the first bus duct housing (11) and the second bus duct housing (12) are arranged at intervals, and a positioning card slot (13) is opened on the first bus duct housing (11), and the positioning card slot (13) is arranged correspondingly to a sliding card block (93) in a bus duct plug-in structure according to any one of claims 1 to 6.

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