Vertical row and main bus direct connection structure of low-voltage switch cabinet and switch cabinet thereof

Abstract

The application discloses a vertical row and main bus direct connection structure of a low-voltage switch cabinet and a switch cabinet thereof, and relates to the field of low-voltage switch cabinets.The vertical row and main bus direct connection structure comprises a main bus and a vertical row, and the two ends of the main bus are provided with mounting mechanisms for fixing the main bus.The mounting mechanism comprises a lower mounting plate arranged at the end of the main bus, and the surface of the lower mounting plate is provided with an upper mounting plate.The surface of the lower mounting plate is provided with a lower mounting groove, and the inside of the lower mounting groove is provided with a limiting mechanism for preliminarily limiting the main bus.The inside of the upper mounting plate is provided with a split mechanism for facilitating the disassembly and assembly of the main bus.The application cancels the traditional copper overlap, realizes the direct connection of the bus to save the cost of copper materials, and stably limits the single bus through the upper and lower clamping assemblies, which facilitates the independent assembly of the single bus, and the split unlocking structure can be used to individually disassemble the faulty bus, thereby simplifying the assembly and maintenance procedures, compactly clamping the linkage, and guaranteeing the firm installation of the bus and the stable power distribution.

Description

Technical Field

[0001] This invention relates to the field of low-voltage switchgear technology, specifically to a vertical row and main busbar direct connection structure of a low-voltage switchgear and its switchgear. Background Technology

[0002] In the field of low-voltage switchgear for smart grids, the main busbar and vertical busbar are the core conductive components for power distribution inside the switchgear. The main busbar is arranged horizontally at the top of the switchgear cabinet, responsible for the total power input and branch distribution of the entire cabinet. The vertical busbar is arranged vertically and is used to connect the main busbar downwards to various functional compartments and circuit breaker branches. The connection structure of the two affects the assembly efficiency, material cost, conductivity stability and ease of maintenance of the switchgear. They are widely used in various low-voltage power distribution scenarios such as industrial plants, data centers, municipal power distribution, and new energy facilities.

[0003] The connection between the main busbar and vertical bar in existing low-voltage switchgear typically adopts a composite bending and overlapping structure, mainly composed of a bent vertical bar, an independent L-shaped overlapping bar, and a fixed mounting plate. During assembly, the upper end of the vertical bar is first processed into an L-shape, Z-shape, or other bending shape. Then, a separately prefabricated L-shaped overlapping bar is selected as a transition intermediate body. One end of the overlapping bar is fitted and locked to the outer wall of the horizontally arranged main busbar, and the other end is fixed to the end of the bent vertical bar with bolts. The main busbar is uniformly locked and fixed to the top of the switchgear cabinet by a whole fixing plate and bolts. This connection structure can realize the conductive connection between the main busbar and the vertical bar. The structural principle is simple and can be formed by conventional processing, and it is widely used in the low-voltage switchgear industry.

[0004] However, this overlapping connection structure has many supporting parts, requiring the separate production of various specifications of L-shaped transition overlapping strips. The excess copper consumption increases production costs and material storage and inventory management costs. During the assembly stage, two bolt alignment and tightening processes need to be completed sequentially, and the double locking process makes assembly time-consuming and alignment installation difficult. At the same time, the main busbar is uniformly fixed to the top of the cabinet. If a single busbar is damaged or malfunctions, it cannot be disassembled and installed separately. Repair and replacement require disassembling the entire surrounding busbar group, making maintenance work cumbersome and time-consuming, and making it difficult to achieve rapid cabinet assembly and convenient maintenance in the later stage. Summary of the Invention

[0005] The purpose of this invention is to provide a vertical busbar and main busbar direct connection structure for a low-voltage switchgear and the switchgear thereof, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: In a first aspect, a vertical busbar and main busbar direct connection structure for a low-voltage switchgear is provided, including a main busbar and a vertical busbar. The two ends of the main busbar are provided with mounting mechanisms for fixing the main busbar. The mounting mechanism includes a lower mounting plate disposed at the end of the main busbar, and an upper mounting plate is disposed on the surface of the lower mounting plate. A lower mounting groove is opened on the surface of the lower mounting plate, and a limiting mechanism for initially limiting the main busbar is disposed inside the lower mounting groove. A disassembly mechanism for facilitating the disassembly and assembly of the main busbar is disposed inside the upper mounting plate.

[0007] Preferably, the main busbars are distributed at equal intervals and are parallel to the ground, the top of the vertical row is perpendicular to the main busbars, and the top of the vertical row is directly connected to the vertical row by bolts.

[0008] Preferably, two sets of lower mounting plates are symmetrically arranged, and the lower mounting plates are perpendicular to the main busbar. The lower mounting grooves penetrate vertically through the side wall of the lower mounting plates, and the lower mounting grooves are opened at equal intervals. The width of the lower mounting grooves is greater than the thickness of the vertical row. The upper mounting plates and the lower mounting plates are fixedly connected by bolts.

[0009] Preferably, the limiting mechanism includes a placement seat that is slidably installed on the inner wall of the lower mounting groove, and a first protective block is fixedly installed on the surface of the placement seat. A connecting rod is hinged to the side wall of the placement seat. A limiting clamp is slidably installed on the side wall of the lower mounting groove, and a rubber pad is provided at the end of the limiting clamp. A first locking block is slidably installed inside the lower mounting plate.

[0010] Preferably, the bottom of the placement seat is provided with a first return spring, and the bottom of the first return spring abuts against the inside of the lower mounting plate. The first protective block has a V-shaped cross-section and is symmetrically arranged on the surface of the placement seat. The surface of the first protective block contacts the bottom outer wall of the main busbar. The first locking block has a T-shaped cross-section and the top of the end of the first locking block near the placement seat is inclined. A second return spring is provided on the side of the first locking block away from the placement seat. A first slot adapted to the first locking block is opened on the bottom side wall of the placement seat. In the main busbar installation state, the first locking block engages with the first slot. An unlocking push block is slidably installed on the side wall of the lower mounting plate. A first unlocking button is provided at the end of the unlocking push block. The cross-section of the unlocking push block is "U"-shaped, and the end of the unlocking push block away from the unlocking button abuts against both ends of the first locking block.

[0011] Preferably, the limiting clamps are symmetrically distributed on both sides of the main busbar. When the main busbar is in the limiting state, the rubber pad on the outer wall of the limiting clamp abuts against the side wall of the main busbar. The end of the connecting rod away from the placement seat is hinged to the bottom of the end of the limiting clamp away from the main busbar.

[0012] Preferably, the disassembly mechanism includes a mounting block that is slidably installed inside the upper mounting plate, and an upper mounting groove is provided at the bottom of the mounting block, and a second protective block is provided at the top of the upper mounting groove. A push plate is slidably installed inside the mounting block, and second locking blocks are provided at both ends of the push plate in a symmetrical arrangement. A second locking groove that matches the second locking blocks is provided inside the upper mounting plate.

[0013] Preferably, the mounting blocks are evenly spaced, the second protective block and the first protective block are symmetrically arranged, and in the installed state, the outer wall of the second protective block abuts against the top of the main busbar. Two sets of push plates are symmetrically arranged, and a telescopic rod is provided between the two sets of push plates. A third reset spring is sleeved on the outer wall of the telescopic rod. The bottom of the second locking block is designed with a slope, and in the installed state, the second locking block engages with the second locking groove. A second unlocking button is provided at the end of the push plate away from the third reset spring.

[0014] Secondly, the present invention provides a low-voltage switchgear, applicable to the direct connection structure of the vertical busbar and the main busbar of the low-voltage switchgear, including a switchgear body, wherein a lower mounting plate is bolted to the top of the switchgear body, and the main busbar and the vertical busbar are located inside the switchgear body.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. This invention replaces the traditional L-shaped transition copper busbar by using a direct bolt connection between the main busbar and the vertical busbar, saving the need for additional copper materials, reducing the cost of parts processing and storage, reducing raw material loss from the source, saving the overall manufacturing cost of the switchgear, and simplifying the installation process.

[0017] 2. This invention uses a limiting mechanism at the lower mounting plate and a disassembly mechanism inside the upper mounting plate to achieve bidirectional clamping and positioning of the busbar by relying on a placement seat, limiting clamps, and protective blocks. During assembly, a single busbar can be independently placed and limited to prevent the main busbar from shaking or shifting during assembly, which facilitates assembly, shortens the pre-assembly time of the cabinet, and improves the production and assembly efficiency of the switchgear.

[0018] 3. This invention uses a split unlocking structure composed of a first locking block, a second locking block, and various sets of reset springs. During maintenance, a single faulty main busbar can be unlocked and disassembled individually without removing surrounding intact busbars and the entire set of installation components. This greatly simplifies the maintenance process and shortens maintenance time. At the same time, the entire limit clamping structure moves synchronously with the busbar disassembly and assembly, eliminating the need for additional fastening accessories. The structure is compact, and the main busbar is installed stably and reliably, meeting the requirements for stable power distribution in switchgear. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the present invention after the main switch cabinet body has been removed;

[0021] Figure 3 This is a schematic diagram of the connection structure between the vertical row and the main busbar of the present invention;

[0022] Figure 4 This is a schematic diagram of the lower mounting plate and upper mounting plate structure of the present invention;

[0023] Figure 5 This is a schematic diagram of the mounting plate structure of the present invention;

[0024] Figure 6 This is a schematic diagram of the cross-sectional structure of the mounting plate of the present invention;

[0025] Figure 7 This is a schematic diagram of the limiting mechanism structure of the present invention;

[0026] Figure 8 This is a schematic diagram of the mounting plate and mounting block structure of the present invention;

[0027] Figure 9 This is a schematic diagram of the second card slot structure of the present invention;

[0028] Figure 10 This is a schematic diagram of the disassembly mechanism of the present invention.

[0029] In the diagram: 1. Switch cabinet body; 101. Vertical row; 102. Main busbar; 2. Lower mounting plate; 21. Lower mounting slot; 3. Placement seat; 31. First slot; 32. First protective block; 33. Connecting rod; 34. First return spring; 4. Limiting clamp; 41. Rubber pad; 5. First locking block; 51. Unlocking push block; 52. First unlocking button; 53. Second return spring; 6. Upper mounting plate; 61. Second slot; 7. Mounting block; 71. Upper mounting slot; 72. Second protective block; 8. Push plate; 81. Second locking block; 82. Second unlocking button; 83. Telescopic rod; 84. Third return spring. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figures 1-10The present invention provides the following technical solution: a vertical busbar and main busbar direct connection structure of a low-voltage switchgear and the switchgear thereof, including a main busbar 102 and a vertical busbar 101. The two ends of the main busbar 102 are provided with mounting mechanisms for fixing the main busbar 102. The mounting mechanism includes a lower mounting plate 2 provided at the end of the main busbar 102, and an upper mounting plate 6 provided on the surface of the lower mounting plate 2. A lower mounting groove 21 is opened on the surface of the lower mounting plate 2, and a limiting mechanism for initially limiting the main busbar 102 is provided inside the lower mounting groove 21. A disassembly mechanism for facilitating the disassembly and assembly of the main busbar 102 is provided inside the upper mounting plate 6.

[0032] In one embodiment of the present invention, the main busbars 102 are distributed at equal intervals and are arranged parallel to the ground. The top of the vertical row 101 is arranged perpendicular to the main busbars 102, and the top of the vertical row 101 is directly connected to the vertical row 101 by bolts.

[0033] In one embodiment of the present invention, two sets of lower mounting plates 2 are symmetrically arranged, and the lower mounting plates 2 are arranged perpendicularly to the main busbar 102. The lower mounting grooves 21 penetrate the side wall of the lower mounting plates 2 vertically, and the lower mounting grooves 21 are opened at equal intervals. The width of the lower mounting grooves 21 is greater than the thickness of the vertical row 101. The upper mounting plate 6 and the lower mounting plate 2 are fixedly connected by bolts.

[0034] As one embodiment of the present invention, the limiting mechanism includes a placement seat 3 that is slidably installed on the inner wall of the lower mounting groove 21, and a first protective block 32 is fixedly installed on the surface of the placement seat 3. A connecting rod 33 is hinged to the side wall of the placement seat 3. A limiting clamp 4 is slidably installed on the side wall of the lower mounting groove 21, and a rubber pad 41 is provided at the end of the limiting clamp 4. A first locking block 5 is slidably installed inside the lower mounting plate 2.

[0035] In one embodiment of the present invention, a first reset spring 34 is provided at the bottom of the placement seat 3, and the bottom of the first reset spring 34 abuts against the interior of the lower mounting plate 2. The first protective block 32 has a V-shaped cross section and is symmetrically arranged on the surface of the placement seat 3. The surface of the first protective block 32 is in contact with the bottom outer wall of the main busbar 102. The first locking block 5 has a T-shaped cross section and the top of the end of the first locking block 5 near the placement seat 3 is inclined. A second reset spring 53 is provided on the side of the first locking block 5 away from the placement seat 3. A first slot 31 adapted to the first locking block 5 is opened on the bottom side wall of the placement seat 3. When the main busbar 102 is installed, the first locking block 5 is engaged with the first slot 31. An unlocking push block 51 is slidably installed on the side wall of the lower mounting plate 2. A first unlocking button 52 is provided at the end of the unlocking push block 51. The unlocking push block 51 has a "U"-shaped cross section and the end of the unlocking push block 51 away from the unlocking button abuts against the two ends of the first locking block 5.

[0036] In one embodiment of the present invention, the limiting clamps 4 are symmetrically distributed on both sides of the main busbar 102. When the main busbar 102 is in the limiting state, the rubber pad 41 on the outer wall of the limiting clamps 4 abuts against the side wall of the main busbar 102. The end of the connecting rod 33 away from the placement seat 3 is hinged to the bottom of the end of the limiting clamps 4 away from the main busbar 102.

[0037] During the busbar pre-installation, the main busbar 102 is placed smoothly between the first protective blocks 32 on both sides. The main busbar 102 is pressed down, and the placement seat 3 is pressed down and compresses the first return spring 34. During the downward movement of the placement seat 3, the two limit clamps 4 on both sides are pulled together by the connecting rod 33. The limit clamps 4 rely on the inner rubber pad 41 to clamp the outer walls on both sides of the main busbar 102. After the placement seat 3 falls into the slot and aligns with the first clamp 5, the second return spring 53 pushes the first clamp 5 into the first slot 31, locking the vertical displacement of the placement and completing the independent limit of a single busbar. Then, the lower end of the main busbar 102 is directly bolted to the top of the vertical busbar 101, eliminating the traditional transition overlap of the copper busbar.

[0038] As one embodiment of the present invention, the disassembly mechanism includes a mounting block 7 that is slidably installed inside the upper mounting plate 6, and an upper mounting groove 71 is provided at the bottom of the mounting block 7, and a second protective block 72 is provided at the top of the upper mounting groove 71. A push plate 8 is slidably installed inside the mounting block 7, and second locking blocks 81 are provided at both ends of the push plate 8 in a symmetrical arrangement. A second locking groove 61 that is adapted to the second locking blocks 81 is provided inside the upper mounting plate 6.

[0039] In one embodiment of the present invention, the mounting blocks 7 are evenly spaced, the second protective block 72 and the first protective block 32 are symmetrically arranged, and in the installed state, the outer wall of the second protective block 72 abuts against the top of the main busbar 102. Two sets of push plates 8 are symmetrically arranged, and a telescopic rod 83 is provided between the two sets of push plates 8. A third reset spring 84 is sleeved on the outer wall of the telescopic rod 83. The bottom of the second locking block 81 is designed with a slope, and in the installed state, the second locking block 81 engages with the second locking groove 61. A second unlocking button 82 is provided at the end of the push plate 8 away from the third reset spring 84.

[0040] In one embodiment of the present invention, a lower mounting plate 2 is bolted to the top of the switch cabinet body 1, and the main busbar 102 and the vertical bar 101 are located inside the switch cabinet body 1.

[0041] The upper mounting plate 6 is fixed to the upper end face of the lower mounting plate 2 by bolts. Under normal conditions, the third reset spring 84 opens the push plates 8 on both sides, so that the second locking block 81 is locked into the second locking groove 61 to lock and position the mounting block 7. The second protective block 72 at the bottom of the mounting block 7 presses down on the top surface of the main busbar 102, and cooperates with the first protective block 32 at the bottom to clamp the main busbar 102 from both above and below, thereby improving the stability of the busbar assembly and preventing loosening and displacement during operation.

[0042] When a single faulty main busbar 102 needs to be inspected and replaced separately, press the second unlock button 82 at the corresponding position. The push plates 8 on both sides will close together and compress the third reset spring 84, causing the second clip to come out of the second slot 61. Take out the mounting block 7 upwards to release the top clamping limit of the main busbar 102. Then press the first unlock button 52. The unlock push block 51 will move horizontally to push open the first clip block 5. The first clip block 5 will disengage from the first slot 31. The placement seat 3 will be raised under the rebound of the first reset spring 34. The connecting rod 33 will pull the limit clamp block 4 outward to loosen the side wall of the busbar, and the faulty main busbar 102 can be pulled out separately for replacement.

[0043] When it is necessary to completely disassemble all the main busbars 102 of the cabinet, first remove all the fastening bolts between the upper mounting plate 6 and the lower mounting plate 2, remove the upper mounting plate 6 as a whole, release the upper end clamping constraint of all the busbars at one time, and then press the first unlocking button 52 of each station one by one to unlock the limit mechanism in stages, so that the main busbars 102 inside the cabinet can be taken out in one go.

[0044] Working principle: When pre-assembling the cabinet of the vertical busbar 101 directly connected to the main busbar 102 of this low-voltage switchgear, the preliminary component layout is carried out first. Multiple sets of vertical busbars 101 are fixedly assembled into the corresponding installation points inside the switchgear body 1 according to the power distribution layout specifications, ensuring that all vertical busbars 101 are vertically aligned and positioned, reserving installation space for the upper end to connect with the main busbar 102. Then, two sets of lower mounting plates 2 are taken out and symmetrically locked to the inner top of the switchgear cabinet using fastening bolts. Several lower mounting slots 21 are equally spaced on the lower mounting plates 2. The lower mounting slots 21 are pre-installed with mounting bases 3 and rubber-coated... The limiting mechanism components such as the limiting clamp 4 of the rubber pad 41, the connecting rod 33, and the first locking block 5 are supported at the bottom of the placement seat 3 by the first return spring 34. The first locking block 5 is pressed by the second return spring 53 to maintain an outward spring trend, completing the pre-installation preparation work of the busbar base. During the busbar assembly stage, the operator hoists the main busbar 102 one by one in batches, and places the end of the main busbar 102 stably in the middle positioning position of the two V-shaped first protective blocks 32 on the top of the placement seat 3 in the same lower installation groove 21. After holding the main busbar 102 to keep it horizontal, vertical pressure is applied downwards, and the main busbar 102 squeezes the placement seat 3 along the lower installation groove. The inner wall of the slot 21 slides smoothly downwards, and the placement seat 3 continuously compresses the first return spring 34 at the bottom as it moves downwards. During the downward movement of the placement seat 3, the connecting rods 33 hinged on both sides simultaneously pull the left and right pairs of limiting clamps 4 toward each other. The rubber pads 41 on the inner side of the limiting clamps 4 gradually press against the outer walls of both sides of the main busbar 102, and the rubber pads 41 achieve anti-slip buffering and side wall clamping and positioning. As the placement seat 3 continues to fall, when the first slot 31 on the side wall of the placement seat 3 slides to the position of the first clamp 5, the first clamp 5, which was originally pressed by the second return spring 53, loses its obstruction, and the inclined surface at the end locks in place. The main busbar 102 is inserted into the first slot 31, locking the vertical displacement of the placement seat 3. At this time, the main busbar 102 is supported by the first protective block 32 at the bottom and clamped by the limiting clamps 4 on both sides, completing the independent initial limiting and fixing of a single main busbar 102. After the limiting is completed, no additional manual fixing is required. The operator can directly align the main busbar 102 with the top face of the vertical bar 101 below and insert the fastening bolt to achieve direct connection and fixing of the main busbar 102 and the vertical bar 101, eliminating the traditional transition and overlapping copper busbar. Repeat the above operation to complete the placement, clamping and limiting, and bolt connection of all main busbars 102 with the vertical bar 101 in sequence.

[0045] After all main busbars 102 wiring is completed, the upper pressure plate assembly process begins. The upper mounting plate 6 of the disassembly mechanism is aligned and fastened to the upper end face of the lower mounting plate 2. Bolts are used to lock and fix the upper mounting plate 6 and the lower mounting plate 2. Inside the upper mounting plate 6, there is a detachable mounting block 7 corresponding to each position of the main busbar 102. Under normal conditions, the third return spring 84 opens the push plates 8 on both sides, causing the second locking block 81 to be inserted into the second locking groove 61 of the upper mounting plate 6, thereby locking and fixing the mounting block 7. The second protective block 72 at the bottom of the mounting block 7 presses down on the upper surface of the main busbar 102, and cooperates with the first protective block 32 below to clamp the main busbar 102 from both the top and bottom, further improving the installation firmness of the main busbar 102 and preventing the busbar from loosening or shifting during operation.

[0046] The subsequent equipment maintenance and disassembly are divided into two operation modes: single busbar disassembly and complete disassembly of the entire batch of busbars. When replacing and maintaining a single main busbar 102, for the faulty busbar, first pinch the second unlocking button 82 at both ends of the corresponding mounting block 7. The push plates 8 on both sides are squeezed inward by external force, compressing the third return spring 84 on the outside of the telescopic rod 83. This causes the second locking block 81 to retract inward and disengage from the second locking groove 61, releasing the locking constraint of the mounting block 7. Lift the mounting block 7 upward and remove it. The top pressing limit of this section of main busbar 102 is completely released. Next, press the first unlocking button 52 on the side of the mounting plate 2. The button drives the U-shaped unlocking push block 51 to move laterally. The two ends of the push block push simultaneously push the first locking blocks 5 on both sides. The first locking blocks 5 overcome the elasticity of the second return spring 53 and exit from the first locking groove 31 of the placement seat 3. The placement seat 3 loses the locking restriction of the locking blocks and is at the bottom first The entire structure is lifted by the upward thrust of the return spring 34. The placement seat 3 moves upward and pulls the limit clamps 4 on both sides outward through the connecting rod 33. The rubber pad 41 on the inner side of the limit clamp 4 is released from the side wall of the main busbar 102. All the clamping limits around the main busbar 102 are released, and the faulty main busbar 102 can be directly pulled out to complete the replacement and repair. When disassembling all the main busbars 102 in the cabinet, first unscrew all the connecting bolts between the upper mounting plate 6 and the lower mounting plate 2, and remove the entire upper mounting plate 6. The mounting blocks 7 and the second protective blocks 72 above all the main busbars 102 are removed at the same time, and the top limits of all the busbars are released at once. Then, press the first unlocking button 52 of each station of the mounting plate 2 one by one to unlock the placement seat 3 and the limit clamp 4 one by one. Release the bottom clamping structure of each main busbar 102 in turn, and then take out all the main busbars 102 inside the cabinet.

[0047] This structure adopts a direct connection installation method for the main busbar 102 and vertical busbar 101, eliminating the need for transition copper busbars and saving production costs. Combined with a split upper and lower limit and independent buckle unlocking structure, it can not only speed up on-site assembly efficiency, but also realize the independent disassembly and assembly of a single busbar without disassembling the surrounding intact busbars, effectively simplifying the later inspection and maintenance process of the switchgear.

[0048] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A vertical busbar and main busbar direct connection structure for a low-voltage switchgear, comprising a main busbar (102) and a vertical busbar (101), characterized in that: Mounting mechanisms for fixing the main busbar (102) are arranged at both ends of the main busbar (102), each mounting mechanism includes a lower mounting plate (2) arranged at the end of the main busbar (102), an upper mounting plate (6) is arranged on the surface of the lower mounting plate (2), a lower mounting groove (21) is formed on the surface of the lower mounting plate (2), a limiting mechanism for preliminarily limiting the main busbar (102) is arranged inside the lower mounting groove (21), and a disassembly mechanism facilitating the assembly and disassembly of the main busbar (102) is arranged inside the upper mounting plate (6).

2. The vertical row and main busbar direct connection structure of a low-voltage switchgear according to claim 1, characterized in that: The main busbars (102) are distributed at equal intervals and arranged parallel to the ground, the top end of the vertical bar (101) is arranged perpendicular to the main busbar (102), and the top end of the vertical bar (101) is directly connected to the vertical bar (101) through a bolt.

3. The vertical row and main busbar direct connection structure of a low-voltage switchgear according to claim 1, characterized in that: Two sets of the lower mounting plates (2) are symmetrically arranged, the lower mounting plates (2) are arranged perpendicular to the main busbar (102), the lower mounting grooves (21) vertically penetrate through the side walls of the lower mounting plates (2), the lower mounting grooves (21) are formed at equal intervals, the width of each lower mounting groove (21) is greater than the thickness of the vertical bar (101), and the upper mounting plate (6) and the lower mounting plate (2) are fixedly connected through bolts.

4. The vertical row and main busbar direct connection structure of a low-voltage switchgear according to claim 1, characterized in that: The limiting mechanism comprises a placement seat (3) slidably mounted on the inner wall of the lower mounting groove (21), a first protection block (32) is fixedly mounted on the surface of the placement seat (3), a connecting rod (33) is hinged to the side wall of the placement seat (3), a limiting clamping block (4) is slidably mounted on the side wall of the lower mounting groove (21), a rubber pad (41) is arranged at the end of the limiting clamping block (4), and a first clamping block (5) is slidably mounted inside the lower mounting plate (2).

5. The vertical row and main busbar direct connection structure of a low-voltage switchgear according to claim 4, characterized in that: A first return spring (34) is arranged at the bottom of the placement seat (3), the bottom of the first return spring (34) abuts against the inside of the lower mounting plate (2), the first protection block (32) has a V-shaped cross section, the first protection blocks (32) are symmetrically arranged on the surface of the placement seat (3), the surface of the first protection block (32) is in contact with the outer wall of the bottom of the main busbar (102), the first clamping block (5) has a T-shaped cross section, the top of the end, close to the placement seat (3), of the first clamping block (5) is designed as an inclined surface, a second return spring (53) is arranged on the side, away from the placement seat (3), of the first clamping block (5), a first clamping groove (31) matched with the first clamping block (5) is formed in the side wall of the bottom of the placement seat (3), the first clamping block (5) is engaged with the first clamping groove (31) when the main busbar (102) is in an installed state, an unlocking push block (51) is slidably mounted on the side wall of the lower mounting plate (2), a first unlocking button (52) is arranged at the end of the unlocking push block (51), the unlocking push block (51) has a "U"-shaped cross section, and the end, away from the unlocking button, of the unlocking push block (51) abuts against the two ends of the first clamping block (5).

6. The vertical row and main busbar direct connection structure of a low-voltage switchgear according to claim 4, characterized in that: The limiting clamp (4) is symmetrically distributed on both sides of the main busbar (102). When the main busbar (102) is in the limiting state, the rubber pad (41) on the outer wall of the limiting clamp (4) abuts against the side wall of the main busbar (102). The end of the connecting rod (33) away from the placement seat (3) is hinged to the bottom of the end of the limiting clamp (4) away from the main busbar (102).

7. The vertical row and main busbar direct connection structure of a low-voltage switchgear according to claim 1, characterized in that: The disassembly mechanism includes a mounting block (7) that is slidably installed inside the upper mounting plate (6), and an upper mounting groove (71) is provided at the bottom of the mounting block (7), and a second protective block (72) is provided at the top inside the upper mounting groove (71). A push plate (8) is slidably installed inside the mounting block (7), and second locking blocks (81) are provided at both ends of the push plate (8) in a symmetrical arrangement. A second locking groove (61) that matches the second locking block (81) is provided inside the upper mounting plate (6).

8. The vertical row and main busbar direct connection structure of a low-voltage switchgear according to claim 7, characterized in that: The mounting blocks (7) are evenly spaced. The second protective block (72) and the first protective block (32) are symmetrically arranged. In the installation state, the outer wall of the second protective block (72) abuts against the top of the main busbar (102). Two sets of push plates (8) are symmetrically arranged. A telescopic rod (83) is provided between the two sets of push plates (8). A third reset spring (84) is sleeved on the outer wall of the telescopic rod (83). The bottom of the second locking block (81) is designed with a slope. In the installation state, the second locking block (81) engages with the second locking groove (61). A second unlocking button (82) is provided at the end of the push plate (8) away from the third reset spring (84).

9. A low-voltage switchgear, applicable to the vertical row and main busbar direct connection structure of the low-voltage switchgear according to any one of claims 1-8, comprising a switchgear body (1), characterized in that: The top of the switch cabinet body (1) is bolted with a lower mounting plate (2), and the main busbar (102) and vertical bar (101) are located inside the switch cabinet body (1).

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