A direct-connected busbar system low-voltage cabinet

Abstract

The present invention relates to the technical field of power equipment, and proposes a low-voltage cabinet with a direct-connected busbar system, including a cabinet frame, which is a rectangular frame; it also includes a busbar frame, a main busbar and a vertical row. Among them, several busbar frames are fixed in the cabinet frame. The busbar frame is composed of a detachable first plate and a second plate, and three through grooves arranged in a "pin" shape are provided on the busbar frame. The through grooves are used to clamp the main busbar and the vertical row for fixing, and the bearing plate is fixed on the sides of the first plate and the second plate; in the above structure, the setting of the busbar frame enables the main busbar and the vertical row to be connected without bending, which is convenient for component assembly and improves the heat dissipation efficiency. Moreover, a bearing plate is provided on the busbar frame, which can protect, support or prevent the end of the main busbar or the vertical row from moving, improve the convenience of component installation, and have good versatility; thus solving the problems of inconvenient assembly, poor heat dissipation effect and poor versatility of the busbar frame in the existing low-voltage cabinet.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power equipment, and in particular to a direct-connection busbar system low-voltage cabinet. Background Art

[0002] In order to improve the convenience, flexibility and reliability of electric energy use at power terminals, the research and development and application of switchgear are becoming increasingly important. Today, the overall low-voltage switchgear has been greatly improved, which is specifically manifested in compact appearance, standardized and modular structure, as well as technical features such as high protection and high reliability. The low-voltage cabinet is mainly composed of a shell and several electrical components. A number of wire bars for conduction are arranged in the low-voltage cabinet. The wire bars are mostly fixed by bolts and are mainly divided into main busbars, longitudinal bars and connecting bars for branches, which are used for power transmission and distribution. Although the structure of the low-voltage cabinet is constantly developing and optimizing, there are still some problems that need to be solved.

[0003] The invention patent application with the existing application publication number CN106451739A provides a low-voltage switch cabinet, in which the longitudinal phase lines inside are arranged in a bent row. The bent row is time-consuming and labor-intensive to install, and affects air circulation and has poor heat dissipation effect. Therefore, some switch cabinets adopt vertical rows, such as the invention patent with the authorization announcement number CN104184055B, which discloses a combined low-voltage control switch cabinet, and the utility model patent with the authorization announcement number CN214227482U, which discloses a low-voltage drawer-type switch cabinet, both of which adopt vertical rows.

[0004] When the existing switch cabinet is installed in vertical rows, the vertical rows are arranged in parallel, and the heat dissipation effect is still not good enough. When the vertical rows are connected to the main busbar, the main busbar needs to be bent to connect to the vertical row, or the top of the vertical row needs to be bent to connect to the main busbar. The connecting row of the switch needs to be bent to connect to the vertical row, which makes the assembly of the switch cabinet components inconvenient and affects the production efficiency. Secondly, the busbar frame used to fix the main busbar and the vertical row has poor versatility. During installation, the busbar needs to pass through the busbar frame, which is not convenient to assemble. In addition, the busbar frame generally only has a clamping and limiting function, which is relatively simple. Summary of the invention

[0005] In view of this, the present invention proposes a direct-connected busbar system low-voltage cabinet with good heat dissipation effect, convenient assembly and good busbar frame versatility.

[0006] The technical solution of the present invention is implemented as follows: The present invention provides a direct-connection busbar system low-voltage cabinet, comprising a cabinet frame, a unit partition and a mounting plate.

[0007] Wherein, the cabinet frame is a rectangular parallelepiped frame;

[0008] The unit partition is fixed horizontally in the cabinet frame, and a plurality of unit partitions are arranged in a longitudinal array;

[0009] A number of mounting plates are longitudinally arranged within the cabinet frame. The number of mounting plates is flush with each other, and the mounting plates are fixedly connected to the unit partitions.

[0010] It further includes a busbar frame, a main busbar, and vertical buses. Among them,

[0011] A number of busbar frames are fixed within the cabinet frame. The busbar frame includes a first plate, a second plate, a positioning block, and a bearing plate. Among them, a through groove is provided on the first plate, and the top of the through groove on the first plate is open. Two through grooves are provided on the second plate, and the bottoms of the through grooves on the second plate are open. The three through grooves are arranged in a "pin" shape layout; the positioning block is fixed on the upper end face of the first plate, a groove is provided on the bottom end face of the second plate, the top surface of the first plate abuts against the bottom surface of the second plate and is detachably connected, and the positioning block is fitted into the groove; the bearing plate is a U-shaped plate, and the bearing plate is detachably connected to the first plate and the second plate to selectively seal one side opening of the three through grooves.

[0012] Both the main busbar and the vertical buses are clamped and fixed within the cabinet frame by the busbar frame using the through grooves. The main busbar and the vertical buses are each arranged in a "pin" shape layout with three, and the tops of the three vertical buses are each fixed to one main busbar.

[0013] Based on the above technical solutions, preferably, through holes are provided on both the first plate and the second plate of the busbar frame. The cabinet frame is made of section steel, and a number of fixing holes are provided on the cabinet frame. Fasteners pass through the through holes and the fixing holes to connect and fix the first plate, the second plate, and the cabinet frame in series.

[0014] Based on the above technical solutions, preferably, the fasteners are nuts and bolts or nut sleeves and bolts.

[0015] Based on the above technical solutions, preferably, the bearing plate is connected to the first plate and the second plate by a first connection structure. The first connection structure includes a chute and a sliding plate. Among them,

[0016] Chutes are provided on both side edges of the first plate and the second plate;

[0017] Two sliding plates are provided on the bearing plate. The two sliding plates are symmetrically arranged on both sides of the bearing plate. The sliding plates are inserted into the chutes to fix the bearing plate to the first plate and the second plate. The sliding plates and the chutes are in an interference fit.

[0018] Based on the above technical solutions, preferably, it further includes a bolt. The bolt passes through the bearing plate and the second plate and is locked and fixed.

[0019] On the basis of the above technical solution, preferably, the bearing plate is connected to the first plate and the second plate by a second connection structure, and the second connection structure includes bolt holes, screws and nuts.

[0020] There are two bolt holes on the first plate, one bolt hole on the second plate, and the three bolt holes are arranged in a triangle;

[0021] Three screws are fixed on the load-bearing plate, and the three screws correspond to three bolt holes arranged in a triangular layout. The load-bearing plate is installed on the first plate and the second plate by passing the screws through the bolt holes, and the screws are locked and fixed by nuts.

[0022] On the basis of the above technical solution, preferably, two busbar frames are longitudinally arranged in the cabinet frame, the main busbar is clamped and fixed by two vertically arranged busbar frames, and the end of the main busbar is clamped in the through groove of the busbar frame; a plurality of busbar frames are horizontally arranged in the cabinet frame, the vertical row is clamped and fixed by a plurality of horizontally arranged busbar frames, the vertical row is clamped in the through groove of the busbar frame, and the top of the vertical row is abutted against the main busbar.

[0023] On the basis of the above technical solution, preferably, it further includes a switch base, a switch controller and a connection bar, wherein:

[0024] The switch base is fixed to the mounting plate;

[0025] The switch controller is fixed to the front of the switch base, and the switch controller is electrically connected to the switch base;

[0026] Three connection rows are fixed on the side of the switch base, and the three connection rows are arranged in a stepped manner and abut against the vertical row.

[0027] On the basis of the above technical solution, preferably, it also includes a plurality of baffles, wherein a plurality of baffles are longitudinally arranged in the cabinet frame, the plurality of baffles are flush with each other, and the baffles are fixedly connected to the cabinet frame, the vertical row, the switch base and the connecting row are all located in the middle position between the baffle and the mounting plate, and the part of the baffle corresponding to the vertical row and the connecting row is provided with a ventilation grille.

[0028] On the basis of the above technical solution, preferably, a bus box is further included, wherein the bus box is fixed on the cabinet frame, the main busbar is located in the bus box, and the vertical row passes through the bus box and is abutted and connected with the main busbar.

[0029] The direct-connected busbar system low-voltage cabinet of the present invention has the following beneficial effects compared with the prior art:

[0030] (1) By setting up a busbar frame for fixing the main busbar and the vertical busbar, since the busbar frame is composed of a first plate and a second plate, and the two plates can be disassembled, it can be directly sleeved on the busbar during installation, without connecting the busbar to the busbar frame by inserting it into the through slot, which improves the convenience of component connection; the three through slots on the busbar frame are arranged in a "pin" shape, so that the three main busbars and the three vertical busbars can be connected错开, so that the connection can be realized without bending the main busbar and the vertical busbar, effectively improving the assembly efficiency. Moreover, compared with the layout where the busbars are arranged side by side, there is a large gap between the busbars, which is conducive to heat dissipation and is convenient for observing whether the bolts used for connecting the busbars are tightened in place to ensure stable connection and safe use.

[0031] (2) By setting a bearing plate on the busbar frame to seal one side opening of the three through slots, when installing the main busbar or the vertical busbar, the busbar frame can abut against the busbar through the bearing plate to support or limit the busbar, so as to improve the convenience of assembly. The bearing plate can also play a role in protecting the end of the busbar, with strong functionality.

[0032] (3) By arranging the connection bars of the switch base in a stepped manner, when connecting the vertical busbar, it can be directly connected without bending, effectively improving the assembly efficiency of the components. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0034] Figure 1 Is a perspective view of the low-voltage cabinet of the direct-connected busbar system of the present invention;

[0035] Figure 2 Is a front view of the low-voltage cabinet of the direct-connected busbar system of the present invention;

[0036] Figure 3 Is a left view of the low-voltage cabinet of the direct-connected busbar system of the present invention;

[0037] Figure 4 Is a rear view of the low-voltage cabinet of the direct-connected busbar system of the present invention;

[0038] Figure 5 Is a layout schematic diagram of the main busbar, switch base and connection bar of the low-voltage cabinet of the direct-connected busbar system of the present invention;

[0039] Figure 6It is a connection structure diagram of the main busbar, vertical busbar and connecting busbar of the direct-connected busbar system low-voltage cabinet of the present invention;

[0040] Figure 7 It is a top view structural diagram of the connection bar and main busbar connection of the low-voltage cabinet of the direct-connected busbar system of the present invention;

[0041] Figure 8 The direct-connected busbar system low-voltage cabinet of the present invention Figure 5 Structure diagram of point A in the middle;

[0042] Fig. 9 It is a busbar frame structure diagram of a low-voltage cabinet of a direct-connected busbar system of the present invention;

[0043] Fig.10 This is a first connection structure diagram of the bearing plate of the low-voltage cabinet of the direct-connected busbar system of the present invention;

[0044] Fig.11 It is an exploded view of the first connection structure of the bearing plate of the low-voltage cabinet of the direct-connected busbar system of the present invention;

[0045] Fig.12 This is a second connection structure diagram of the bearing plate of the low-voltage cabinet of the direct-connected busbar system of the present invention;

[0046] Fig.13 It is an exploded view of the second connection structure of the load-bearing plate of the low-voltage cabinet of the direct-connected busbar system of the present invention. DETAILED DESCRIPTION

[0047] The following will be combined with 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.

[0048] like Figures 1 to 13 As shown, the cabinet frame 1, unit partition 2, mounting plate 3, busbar frame 4, main busbar 5, vertical bar 6, switch base 7, switch controller 8, connecting bar 9, baffle 10 and busbar box 11 of the present invention.

[0049] like Figures 1 to 3 As shown, the cabinet frame 1, the unit partition 2 and the mounting plate 3 are of the prior art, the cabinet frame 1 is a rectangular parallelepiped frame; the unit partition 2 is horizontally fixed in the cabinet frame 1, and a plurality of unit partitions 2 are arranged in a longitudinal array; a plurality of mounting plates 3 are longitudinally arranged in the cabinet frame 1, the plurality of mounting plates 3 are flush with each other, and the mounting plates 3 are fixedly connected to the unit partition 2;

[0050] In the above components, the cabinet frame 1 is used to fix electrical components, and the outer side is fixed with box plates for sealing. The unit partition 2 is used for separating electrical components, and the mounting plate 3 is used for installing electrical components;

[0051] In order to fix the busbar row, it is necessary to use the busbar frame 4, as Figure 1 and Fig. 9 shown. A number of busbar frames 4 are fixed in the cabinet frame 1. The busbar frame 4 includes a first plate 401, a second plate 402, a positioning block 403 and a bearing plate 406. Among them, a through groove 404 is provided on the first plate 401, and the top of the through groove 404 on the first plate 401 is open. Two through grooves 404 are provided on the second plate 402, and the bottoms of the through grooves 404 on the second plate 402 are open. The three through grooves 404 are arranged in a "pin" shape; the positioning block 403 is fixed on the upper end face of the first plate 401, and a groove 405 is provided on the bottom end face of the second plate 402. The top surface of the first plate 401 abuts against the bottom surface of the second plate 402 and is detachably connected. The positioning block 403 is fitted into the groove 405; the main busbar 5 and the vertical busbar 6 are both clamped and fixed in the cabinet frame 1 by the busbar frame 4 using the through grooves 404. The main busbar 5 and the vertical busbar 6 are each arranged in a "pin" shape with three in number, and the tops of the three vertical busbars 6 are each fixed on a main busbar 5;

[0052] In this way, when fixing the main busbar 5 and the vertical busbar 6, the connection between the two can be achieved without bending the main busbar 5 and the vertical busbar 6. The main busbar 5 and the vertical busbar 6 are both arranged in a "pin" shape, which has a relatively large porosity, is conducive to air circulation for heat dissipation, and is convenient for observing whether the connection bolts are tightened in place; secondly, since the first plate 401 and the second plate 402 are detachably connected, in this way, when installing the main busbar 5 and the vertical busbar 6, the busbar frame 4 can be directly disassembled and sleeved onto the main busbar 5 or the vertical busbar 6, without installing the main busbar 5 or the vertical busbar 6 by inserting it into the through groove 404, thereby improving the convenience of installing the busbar frame 4. The settings of the positioning block 403 and the groove 405 are used to position the connection between the first plate 401 and the second plate 402 to improve the convenience of connection, and the setting of the groove 405 can also increase the creepage distance between phases to improve the safety of use;

[0053] As Figure 6As shown, in this embodiment, a specific installation method of a main busbar 5 and a vertical row 6 is provided: two busbar frames 4 are longitudinally arranged in the cabinet frame 1, and the main busbar 5 is clamped and fixed by two vertically arranged busbar frames 4, and the end of the main busbar 5 is clamped in the through groove 404 of the busbar frame 4; a plurality of busbar frames 4 are horizontally arranged in the cabinet frame 1, and the vertical row 6 is clamped and fixed by a plurality of horizontally arranged busbar frames 4, and the vertical row 6 is clamped in the through groove 404 of the busbar frame 4, and the top of the vertical row 6 is abutted against the main busbar 5, and then the main busbar 5 and the vertical row 6 are connected and fixed by bolts;

[0054] Since the busbar frame 4 generally only has a clamping and limiting function, it cannot support and protect the ends of the line bar. Therefore, in this device, a bearing plate 406 is provided on the busbar frame 4. Figures 10 to 13 As shown, the load-bearing plate 406 is a U-shaped plate, and the load-bearing plate 406 is detachably connected to the first plate 401 and the second plate 402 to selectively seal one side opening of the three through slots 404;

[0055] In this way, after the load-bearing plate 406 is installed on the busbar frame 4, after the end of the main busbar 5 is inserted into the through groove 404, the end of the main busbar 5 will be against the load-bearing plate 406, and the load-bearing plate 406 plays a role in stopping the movement, which is convenient for the subsequent fixation of the main busbar 5 or the connection with the vertical row 6. The busbar frame 4 can also be fixed in the cabinet frame 1 first, and then the bottom of the vertical row 6 can be inserted into the through groove 404. At this time, the load-bearing plate 406 can support the vertical row 6 to facilitate the subsequent connection work; when fixing the middle section of the main busbar 5 or the vertical row 6, it is only necessary to remove the load-bearing plate 406 so that the line row can pass through the through groove 404, thereby making the busbar frame 4 have higher versatility and stronger functionality.

[0056] In this embodiment, as a preferred method, Figure 8 and Fig. 9 As shown, the first plate 401 and the second plate 402 of the busbar frame 4 are both provided with through holes 407, the cabinet frame 1 is made of steel, and a plurality of fixing holes 101 are provided on the cabinet frame 1. Fasteners pass through the through holes 407 and the fixing holes 101 to connect and fix the first plate 401, the second plate 402 and the cabinet frame 1 in series;

[0057] In the above components, the through hole 407 is used for connecting and fixing the first plate 401 and the second plate 402 and installing the busbar frame 4. The busbar frame 4 is connected in series with the cabinet frame 1 by fasteners passing through the through hole 407. The fasteners provide two fixing solutions:

[0058] One is to use nuts and bolts. During installation, the bolts are passed through the through holes 407 and the fixing holes 101 on the cabinet frame 1, and then the nuts are used to connect the bolts and tighten them.

[0059] The second method is to use nut sleeves and bolts. Specifically, during installation, the nut sleeve is first fixed to the cabinet frame 1 by riveting or welding, and then the bolt is passed through the through hole 407 of the busbar frame 4 and connected to the nut sleeve.

[0060] In this embodiment, as a preferred method, two methods of fixing the load-bearing plate 406 are provided;

[0061] One of them is Fig.10 and Fig.11 As shown, the load-bearing plate 406 is connected to the first plate 401 and the second plate 402 by using a first connection structure 408, and the first connection structure 408 includes a slide groove 4081 and a slide plate 4082, wherein the slide groove 4081 is provided on both sides of the first plate 401 and the second plate 402; two slide plates 4082 are provided on the load-bearing plate 406, and the two slide plates 4082 are symmetrically arranged on both sides of the load-bearing plate 406, and the slide plates 4082 are plugged into the slide groove 4081 to fix the load-bearing plate 406 to the first plate 401 and the second plate 402, and the slide plates 4082 and the slide groove 4081 are interference fit;

[0062] In this way, when the busbar frame 4 is needed to stop, support or protect the main busbar 5 or the vertical busbar 6, it is only necessary to plug the load-bearing plate 406 into the slide grooves 4081 on the sides of the first plate 401 and the second plate 402 through the slide plate 4082. The slide plate 4082 and the slide groove 4081 are interference fit, which can prevent the load-bearing plate 406 from falling off.

[0063] In order to further improve the installation stability of the bearing plate 406, the device is also provided with a bolt 4083, which passes through the bearing plate 406 and the second plate 402 and is locked and fixed, so as to improve the integrity of the bearing plate 406 and the second plate 402, thereby preventing the bearing plate 406 from falling off.

[0064] Second, Fig.12 and Fig.13As shown, the bearing plate 406 is connected to the first plate 401 and the second plate 402 by using a second connection structure 409, and the second connection structure 409 includes a bolt hole 4091, a screw rod 4092 and a nut 4093, wherein two bolt holes 4091 are provided on the first plate 401, and one bolt hole 4091 is provided on the second plate 402, and the three bolt holes 4091 are arranged in a triangle; three screw rods 4092 are fixed on the bearing plate 406, and the three screw rods 4092 are arranged in a triangle corresponding to the three bolt holes 4091, and the bearing plate 406 is installed on the first plate 401 and the second plate 402 by passing the screw rods 4092 through the bolt holes 4091, and the screw rods 4092 are locked and fixed by nuts 4093;

[0065] The above-mentioned structure is set up so that the bearing plate 406 can connect and fix the first plate 401 and the second plate 402. While playing the role of supporting and stopping, it has the function of limiting the first plate 401 and the second plate 402 in the horizontal and vertical directions, which is beneficial to improving the overall strength of the busbar frame 4. Since there may be processing errors in the line row, if the line row is wide, after the first plate 401 and the second plate 402 clamp the line row, the first plate 401 and the second plate 402 may not fit together, which will cause the three screws 4092 to be unable to correspond to the three bolt holes 4091 for installation. Therefore, the bolt holes 4091 on the first plate 401 and the second plate 402 can be set to be long strips. The specific structure is as follows Fig.13 As shown, the bolt holes 4091 on the second plate 402 are arranged in a long strip shape.

[0066] In this embodiment, as a preferred method, Figures 5 to 7 As shown, the switch base 7 is fixed on the mounting plate 3; the switch controller 8 is fixed on the front of the switch base 7, and the switch controller 8 is electrically connected to the switch base 7; three connection rows 9 are fixed on the side of the switch base 7, and the three connection rows 9 are arranged in a stepped manner and abut against the vertical row 6;

[0067] By setting the above structure, the connecting row 9 can be connected and fixed to the vertical row 6 without bending, thereby effectively improving the assembly efficiency of the components and facilitating subsequent maintenance work.

[0068] In this embodiment, as a preferred method, Figures 1 to 4 As shown, a plurality of baffles 10 are longitudinally arranged in the cabinet frame 1, the plurality of baffles 10 are flush with each other, and the baffles 10 are fixedly connected to the cabinet frame 1, the vertical row 6, the switch base 7 and the connecting row 9 are all located in the middle of the baffle 10 and the mounting plate 3, and the portion of the baffle 10 corresponding to the vertical row 6 and the connecting row 9 is provided with a ventilation grille 1001;

[0069] In the above structure, a busbar chamber is formed between the mounting plate 3 and the baffle 10 to enclose the vertical row 6, the switch base 7 and the connecting row 9, thereby playing a protective isolation role. In order to improve the heat dissipation performance of the device, ventilation grilles 1001 are provided in the parts corresponding to the vertical row 6 and the connecting row 9 for ventilation and heat dissipation.

[0070] In this embodiment, as a preferred method, Figures 1 to 4 As shown, the busbar box 11 is fixed on the cabinet frame 1, the main busbar 5 is located in the busbar box 11, and the vertical row 6 passes through the busbar box 11 and is abutted and connected with the main busbar 5;

[0071] The busbar box 11 is used for the installation of the main busbar 5 to separate and distinguish the main busbar 5 from other components to form a modular structure. The installation layout of each component is clear, which is conducive to subsequent maintenance work.

[0072] Specific implementation steps:

[0073] When the device is in use, two busbar frames 4 are installed in the busbar box 11 to fix the main busbar 5, a switch base 7 is installed on the mounting plate 3, a switch controller 8 is installed on the front of the switch base 7, and multiple busbar frames 4 are installed in the cabinet frame 1 to fix the vertical row 6. When the vertical row 6 is installed, the top of the vertical row 6 is fixedly connected to the main busbar 5 by bolts, and then the switch base 7 is fixedly connected to the vertical row 6 through the connecting row 9. One end of the connecting row 9 is fixed to the pin of the switch base 7 by bolts, and the other end is fixed to the vertical row 6 by bolts. In this way, each line row can be connected without bending, which is not only beneficial to improving assembly efficiency but also beneficial to heat dissipation.

[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A low-voltage cabinet of a direct-connected busbar system, which includes a cabinet frame (1), unit partitions (2), and mounting plates (3). Among them, The cabinet frame (1) is a rectangular parallelepiped-shaped frame; The unit partitions (2) are horizontally fixed inside the cabinet frame (1), and a number of unit partitions (2) are longitudinally arranged in an array; A number of mounting plates (3) are longitudinally arranged inside the cabinet frame (1), and the number of mounting plates (3) are flush with each other, and the mounting plates (3) are fixedly connected to the unit partitions (2); It is characterized in that: it further includes a busbar frame (4), a main busbar (5), and a vertical busbar (6). Among them, A number of busbar frames (4) are fixed inside the cabinet frame (1). The busbar frame (4) includes a first plate (401), a second plate (402), a positioning block (403), and a bearing plate (406). Among them, a through groove (404) is provided on the first plate (401), and the top of the through groove (404) on the first plate (401) is open. Two through grooves (404) are provided on the second plate (402), and the bottoms of the through grooves (404) on the second plate (402) are open. The three through grooves (404) are arranged in a "pin" shape layout; the positioning block (403) is fixed on the upper end face of the first plate (401), a groove (405) is provided on the bottom end face of the second plate (402), the top surface of the first plate (401) abuts against the bottom surface of the second plate (402) and is detachably connected, and the positioning block (403) is fitted into the groove (405); the bearing plate (406) is a U-shaped plate, and the bearing plate (406) is detachably connected to the first plate (401) and the second plate (402) to selectively seal one side opening of the three through grooves (404); Both the main busbar (5) and the vertical busbar (6) are clamped and fixed inside the cabinet frame (1) by the busbar frame (4) using the through grooves (404). Three main busbars (5) and three vertical busbars (6) are each arranged in a "pin" shape layout, and the top ends of the three vertical busbars (6) are each fixed to a main busbar (5); Through holes (407) are provided on both the first plate (401) and the second plate (402) of the busbar frame (4). The cabinet frame (1) is made of section steel, and a number of fixing holes (101) are provided on the cabinet frame (1). Fasteners pass through the through holes (407) and the fixing holes (101) to connect and fix the first plate (401), the second plate (402), and the cabinet frame (1) in series; The fasteners use nuts and bolts or nut sleeves and bolts: The load-bearing plate (406) is connected to the first plate (401) and the second plate (402) by using a first connection structure (408), wherein the first connection structure (408) comprises a slide groove (4081) and a slide plate (4082), wherein the slide groove (4081) is arranged on both sides of the first plate (401) and the second plate (402); two slide plates (4082) are arranged on the load-bearing plate (406), and the two slide plates (4082) are symmetrically arranged on both sides of the load-bearing plate (406), and the slide plates (4082) are plugged into the slide groove (4081) to fix the load-bearing plate (406) to the first plate (401) and the second plate (402), and the slide plates (4082) and the slide groove (4081) are interference fit; It also includes bolts (4083), wherein the bolts (4083) penetrate the bearing plate (406) and the second plate (402) and are locked and fixed; Alternatively, the load-bearing plate (406) is connected to the first plate (401) and the second plate (402) by using a second connection structure (409), the second connection structure (409) comprising bolt holes (4091), screws (4092) and nuts (4093), wherein two bolt holes (4091) are provided on the first plate (401), one bolt hole (4091) is provided on the second plate (402), and the three bolt holes (4091) are arranged in a triangular pattern; three screws (4092) are fixed on the load-bearing plate (406), and the three screws (4092) correspond to the three bolt holes (4091) in a triangular pattern, the load-bearing plate (406) is installed on the first plate (401) and the second plate (402) by means of the screws (4092) passing through the bolt holes (4091), and the screws (4092) are locked and fixed by nuts (4093).

2. The direct-connected busbar system low-voltage cabinet according to claim 1, characterized in that: Two busbar frames (4) are longitudinally arranged in the cabinet frame (1); the main busbar (5) is clamped and fixed by two vertically arranged busbar frames (4); the end of the main busbar (5) is clamped in the through slot (404) of the busbar frame (4); a plurality of busbar frames (4) are horizontally arranged in the cabinet frame (1); the vertical row (6) is clamped and fixed by a plurality of horizontally arranged busbar frames (4); the vertical row (6) is clamped in the through slot (404) of the busbar frame (4), and the top of the vertical row (6) is abutted against the main busbar (5).

3. The direct-connected busbar system low-voltage cabinet according to claim 2, characterized in that: It also includes a switch base (7), a switch controller (8) and a connection bar (9), wherein: The switch base (7) is fixed on the mounting plate (3); The switch controller (8) is fixed to the front of the switch base (7), and the switch controller (8) is electrically connected to the switch base (7); Three connecting rows (9) are fixed on the side of the switch base (7), and the three connecting rows (9) are arranged in a stepped manner and abut against the vertical row (6).

4. The direct-connected busbar system low-voltage cabinet according to claim 3, characterized in that: The cabinet also comprises a plurality of baffles (10), wherein the baffles (10) are arranged longitudinally in the cabinet frame (1), the baffles (10) are flush with each other, and the baffles (10) are fixedly connected to the cabinet frame (1), the vertical row (6), the switch base (7) and the connecting row (9) are all located in the middle of the baffles (10) and the mounting plate (3), and the portion of the baffles (10) corresponding to the vertical row (6) and the connecting row (9) is provided with a ventilation grille (1001).

5. The direct-connected busbar system low-voltage cabinet according to claim 4, characterized in that: It also includes a busbar box (11), wherein the busbar box (11) is fixed on the cabinet frame (1), the main busbar (5) is located in the busbar box (11), and the vertical row (6) passes through the busbar box (11) and is abutted and connected with the main busbar (5).

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