Function board mounting structure and low-voltage switch cabinet

Abstract

The utility model belongs to the technical field of low-voltage equipment, and discloses a function board installation structure and a low-voltage switch cabinet, and the function board installation structure specifically comprises two stand columns, a function board module and a reinforcing member, the two stand columns are fixed on a cabinet body of the low-voltage switch cabinet; the function plate module comprises a lining plate and a cover plate, the lining plate is fixedly connected to the two stand columns, a first clamping groove is formed in the lining plate, a second clamping groove is formed in the cover plate, and the lining plate and the cover plate are fixedly connected in a buckled mode so that the first clamping groove and the second clamping groove can be in butt joint to form a containing space for a busbar to be inserted; the reinforcing piece is fixed to the stand column and located on the side, away from the lining plate, of the cover plate. The lining plate is fixed on the stand column, and the lining plate and the cover plate are buckled and fixedly connected, so that the first clamping groove of the lining plate is in butt joint with the second clamping groove of the cover plate to form the accommodating space for inserting a busbar, and insulation isolation is realized; the reinforcing piece is arranged on the stand column, the reinforcing piece can play a stopping and reinforcing role from the side, away from the lining plate, of the cover plate, and the overall strength is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage equipment technology, and in particular to a functional board mounting structure and a low-voltage switch cabinet. Background Technology

[0002] Low-voltage switchgear is a device used for power transmission, distribution and energy conversion. It controls and protects low-voltage circuits by controlling switches, transformers, power supplies, signals and protection components.

[0003] In existing technologies, vertical channels are usually set up in low-voltage switchgear, and busbars are fixed with busbar clamps. The overall strength is poor, and there is no isolation between adjacent busbars, which makes it easy for phase-to-phase short circuits to occur.

[0004] In other words, there is an urgent need to provide a functional board mounting structure and a low-voltage switchgear to improve overall strength and ensure phase-to-phase insulation performance. Utility Model Content

[0005] The purpose of this utility model is to provide a functional board mounting structure and a low-voltage switchgear to improve overall strength and ensure phase-to-phase insulation performance.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] This utility model provides a functional board mounting structure, including:

[0008] Two uprights are used to fix the cabinet of the low-voltage switchgear;

[0009] A functional board module is located between the two columns. The functional board module includes a bushing plate and a cover plate. The bushing plate is fixedly connected to the two columns. The bushing plate is provided with a first slot, and the cover plate is provided with a second slot that corresponds to the first slot. The bushing plate and the cover plate are fastened and fixedly connected so that the first slot and the second slot are connected to form an accommodating space for inserting the busbar of the low-voltage switchgear.

[0010] The reinforcement is fixed to the column and located on the side of the cover plate away from the bushing plate.

[0011] As an optional technical solution for the functional panel mounting structure, the two ends of the cover plate are respectively connected to the two columns.

[0012] As an optional technical solution for the functional panel mounting structure, each of the columns is provided with a guide groove and a limiting groove communicating with the guide groove. Both ends of the cover plate are provided with a raised bending structure. The raised bending structure is inserted into the guide groove. The raised bending structure can slide in the guide groove along a first direction until it is partially inserted into the limiting groove along a second direction.

[0013] As an optional technical solution for the functional panel mounting structure, the raised bending structure is provided at least twice along the second direction, and the guide groove and the limiting groove are provided one-to-one with the raised bending structure.

[0014] As an optional technical solution for the functional board mounting structure, the limiting groove and the guide groove are provided in a one-to-one correspondence, or each of the guide grooves is connected to a plurality of limiting grooves spaced apart along the first direction.

[0015] As an optional technical solution for the functional board mounting structure, the reinforcement includes a first reinforcement, the two ends of which are fixedly connected to the two columns respectively, and the first reinforcement and the cover plate are inserted into each other or abut against each other.

[0016] As an optional technical solution for the functional panel mounting structure, the reinforcement also includes a second reinforcement, one side of which is overlapped and fixed to the side fold of one of the columns, and the other side of which abuts against the reinforcing rib of the cover plate;

[0017] And / or, the reinforcement further includes a third reinforcement, one side of which is overlapped and fixed to the side fold of one of the columns, and the other side of which abuts against the plane of the cover plate.

[0018] As an optional technical solution for the functional panel mounting structure, the bushing plate has a positioning protrusion on the side near the cover plate, and the cover plate has a positioning groove on the side near the bushing plate, with the positioning protrusion and the positioning groove engaging in a plug-in fit.

[0019] As an optional technical solution for the functional panel mounting structure, the bushing plate is provided with an arc-shaped reinforcing rib located on the outer periphery of the positioning protrusion, the cover plate is provided with a protruding mating part, the positioning groove is provided on the mating part, the mating part is cylindrical, and the mating part is partially inserted between the arc-shaped reinforcing rib and the positioning protrusion.

[0020] This utility model provides a low-voltage switchgear, including a cabinet, busbars and the aforementioned functional board mounting structure.

[0021] Beneficial effects:

[0022] This utility model provides a functional board mounting structure, which includes two columns, a functional board module, and a reinforcing member. The two columns are used to fix the functional board module to the cabinet of a low-voltage switchgear. The functional board module is located between the two columns and includes a bushing plate and a cover plate. The bushing plate is fixedly connected to the two columns. The bushing plate is provided with a first slot, and the cover plate is provided with a second slot corresponding to the first slot. The bushing plate and the cover plate are fastened and fixedly connected so that the first slot and the second slot align to form an accommodating space for the insertion of the busbar of the low-voltage switchgear. The reinforcing member is fixed to the column and located on the side of the cover plate away from the bushing plate. By setting two columns and a functional panel module, a bushing plate is fixed on the column. The bushing plate and the cover plate are fastened and fixedly connected, so that the first slot of the bushing plate aligns with the second slot of the cover plate, thereby forming an accommodating space for the busbar to be inserted. The bushing plate and the cover plate can seal the busbar from the periphery, achieving insulation isolation and preventing mutual interference between adjacent busbars. By setting a reinforcement on the column, the reinforcement can play a blocking and reinforcing role from the side of the cover plate away from the bushing plate, effectively improving the overall strength.

[0023] This utility model provides a low-voltage switchgear, including a cabinet, busbars and the aforementioned functional board mounting structure. By setting the aforementioned functional board mounting structure, phase-to-phase insulation and overall strength are ensured, resulting in safety, stability, and reliable operation. Attached Figure Description

[0024] Figure 1 This is a partial structural schematic diagram of the functional board mounting structure and busbar from a first-view perspective provided in this embodiment of the utility model;

[0025] Figure 2 This is a partial structural schematic diagram of the functional board mounting structure and busbar from a second perspective provided in this embodiment of the utility model;

[0026] Figure 3 This is a schematic diagram of the functional board mounting structure and busbar provided in this embodiment of the utility model;

[0027] Figure 4 yes Figure 3 A magnified view of a section at point A in the middle;

[0028] Figure 5 This is a schematic diagram of the structure of the functional board module provided in this embodiment of the utility model;

[0029] Figure 6 This is a partial structural schematic diagram of the bushing plate and cover plate provided in this embodiment of the utility model;

[0030] Figure 7 This is a first-view structural schematic diagram of the bushing plate provided in an embodiment of the present utility model;

[0031] Figure 8This is a structural schematic diagram of the bushing plate from a second perspective provided in an embodiment of the present utility model;

[0032] Figure 9 This is a first-view structural schematic diagram of the cover plate provided in an embodiment of the present utility model;

[0033] Figure 10 This is a structural schematic diagram of the cover plate from a second perspective provided in an embodiment of the present utility model;

[0034] Figure 11 This is a schematic diagram of the structure of the first reinforcement component provided in this embodiment of the utility model;

[0035] Figure 12 This is a partial structural schematic diagram of the cover plate, column and reinforcement provided in the embodiment of this utility model;

[0036] Figure 13 This is a schematic diagram of the structure of the second reinforcement component provided in this embodiment of the utility model;

[0037] Figure 14 This is a schematic diagram of the structure of the third reinforcement component provided in this embodiment of the utility model.

[0038] In the picture:

[0039] 100. Mother row;

[0040] 10. Column; 11. Guide groove; 12. Limiting groove;

[0041] 20. Functional board module; 21. Bushing plate; 211. First slot; 212. Positioning protrusion; 213. Arc-shaped reinforcing rib; 214. Countersunk hole; 22. Cover plate; 221. Second slot; 222. Protrusion bending structure; 223. Connecting part; 2231. Positioning groove; 224. Reinforcing rib; 225. Heat dissipation through hole; 226. Positioning slot;

[0042] 30. Reinforcing component; 31. First reinforcing component; 311. Connecting part; 312. Abutting part; 32. Second reinforcing component; 33. Third reinforcing component. Detailed Implementation

[0043] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0044] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0045] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0046] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0047] like Figures 1 to 5 As shown, this utility model provides a functional board mounting structure and a low-voltage switchgear. The low-voltage switchgear includes a cabinet, a busbar 100, and a functional board mounting structure. The functional board mounting structure includes two columns 10, a functional board module 20, and a reinforcing member 30. The two columns 10 are fixed to the cabinet of the low-voltage switchgear. The functional board module 20 is located between the two columns 10 and includes a bushing plate 21 and a cover plate 22. The bushing plate 21 is fixedly connected to the two columns 10 and has a first slot 211. The cover plate 22 has a second slot 221 corresponding to the first slot 211. The bushing plate 21 and the cover plate 22 are fastened and fixedly connected so that the first slot 211 and the second slot 221 mate to form an accommodating space for the insertion of the busbar 100 of the low-voltage switchgear. The reinforcing member 30 is fixed to the column 10 and located on the side of the cover plate 22 away from the bushing plate 21.

[0048] By setting two columns 10 and a functional board module 20, a bushing plate 21 is fixed on the column 10. The bushing plate 21 and the cover plate 22 are fastened and fixedly connected, so that the first slot 211 of the bushing plate 21 and the second slot 221 of the cover plate 22 are connected to form an accommodating space for the busbar 100 to be inserted. The bushing plate 21 and the cover plate 22 can close the busbar 100 from the periphery to achieve insulation and isolation, and avoid mutual interference between adjacent busbars 100. By setting a reinforcement member 30 on the column 10, the reinforcement member 30 can play a blocking and reinforcing role from the side of the cover plate 22 away from the bushing plate 21, effectively improving the overall strength.

[0049] In this embodiment, the first direction is the X direction, the second direction is the Z direction, and the third direction is the Y direction; wherein, the Z direction is the vertical direction.

[0050] Specifically, the column 10 extends along the Z direction, and multiple functional panel modules 20 overlap along the Z direction. Each functional panel module 20 includes a bushing plate 21 and a cover plate 22, and the bushing plate 21 and cover plate 22 of each functional panel module 20 are fastened and fixedly connected along the X direction; adjacent bushing plates 21 and adjacent cover plates 22 are inserted into each other. In this embodiment, the length of the functional panel module 20 in the Z direction is 200mm, the length of the column 10 in the Z direction is 1800mm, and a maximum of nine functional panel modules 20 are assembled; the bushing plates 21 are fixed to the two columns 10 on both sides along the Y direction by screws.

[0051] In this embodiment, the bushing plate 21 is provided with four first slots 211, and the cover plate 22 is provided with four second slots 221. When the bushing plate 21 and the cover plate 22 are fastened and fixed, the first slots 211 and the second slots 221 are engaged, thereby forming four accommodating spaces between the bushing plate 21 and the cover plate 22. The busbar 100 includes busbars A, B, C, and N, and the four accommodating spaces are used for the sequential insertion of busbars A, B, C, and N. In other embodiments, the number and specific dimensions of the first slots 211 and the second slots 221 can be set according to actual needs.

[0052] Optionally, the two ends of the cover plate 22 are respectively connected to the two columns 10. Connecting the cover plate 22 to the columns 10 helps to improve the accuracy of the installation position of the cover plate 22, ensures that the cover plate 22 and the bushing plate 21 can be smoothly engaged, avoids repeated adjustments and calibrations of the position of the cover plate 22, and improves assembly efficiency.

[0053] See Figure 3 and Figure 4Each column 10 is provided with a guide groove 11 and a limiting groove 12. The limiting groove 12 is connected to the guide groove 11. Both ends of the cover plate 22 are provided with raised bending structures 222. The raised bending structures 222 are inserted into the guide groove 11 and can slide in the X direction in the guide groove 11 until they are partially inserted into the limiting groove 12 in the Z direction. By setting the raised bending structures 222 on the cover plate 22, and using the raised bending structures 222 in conjunction with the guide groove 11 and the limiting groove 12, the cover plate 22 can be installed and fixed, which is simple to operate and the installation position is accurate.

[0054] Specifically, the raised bending structure 222 is L-shaped; the guide groove 11 extends along the X direction, and the limiting groove 12 is located on one side of the guide groove 11 and extends along the Z direction. The guide groove 11 and the limiting groove 12 together form a T-shape. When the raised bending structure 222 is just inserted into the guide groove 11, the top and bottom surfaces of the raised bending structure 222 slide against the groove wall of the guide groove 11, allowing the raised bending structure 222 to slide along the X direction within the guide groove 11; a portion of the raised bending structure 222 is inserted into the limiting groove 12 along the Z direction and engages with the limiting groove 12 to fix the cover plate 22.

[0055] Optionally, at least two raised bending structures 222 are provided at intervals along the Z direction, and the guide groove 11 and the limiting groove 12 are provided one-to-one with the raised bending structures 222. By providing at least two raised bending structures 222 at intervals along the Z direction on the cover plate 22, and using the raised bending structures 222 at different positions to cooperate with the limiting groove 12 to achieve fixation, it helps to ensure the stability of the initial installation of the cover plate 22.

[0056] In this embodiment, each cover plate 22 is provided with four protruding bending structures 222, and the four protruding bending structures 222 are arranged in pairs and opposite to each other on both sides of the cover plate 22.

[0057] Optionally, the limiting groove 12 and the guide groove 11 are configured in a one-to-one correspondence, or each guide groove 11 is connected to multiple limiting grooves 12 spaced apart along the X direction. If each guide groove 11 is connected to multiple limiting grooves 12 spaced apart along the X direction, then when the protruding bent structure 222 is inserted into the guide groove 11, it can be inserted into a corresponding limiting groove 12 according to actual needs, adapting to different application scenarios, improving applicability, and facilitating the adjustment of the position of the cover plate 22 during installation.

[0058] See Figures 5 to 10To ensure the relative position of the bushing plate 21 and the cover plate 22, the bushing plate 21 has a positioning protrusion 212 on the side near the cover plate 22, and the cover plate 22 has a positioning groove 2231 on the side near the bushing plate 21. The positioning protrusion 212 and the positioning groove 2231 are interlocked. By setting the positioning protrusion 212 and the positioning groove 2231 to interlock, the accuracy of the relative position of the bushing plate 21 and the cover plate 22 can be ensured when the cover plate 22 is installed.

[0059] In this embodiment, overlapping plates are provided at both edges of the bushing plate 21, and countersunk holes 214 are provided on the overlapping plates. At least two countersunk holes 214 are provided at intervals on each edge. Screws are inserted through the countersunk holes 214 and fixed to the column 10. By providing countersunk holes 214, the screw heads can be embedded in the surface of the bushing plate 21, resulting in a flat appearance and better stress distribution.

[0060] See Figure 9 The cover plate 22 has multiple heat dissipation holes 225, which are arranged in a 2×2 square array. By providing heat dissipation holes 225 on the cover plate 22, the functional board mounting structure has good heat dissipation performance and meets the temperature rise requirements.

[0061] See Figure 6 and Figure 10 Optionally, the bushing plate 21 is provided with an arc-shaped reinforcing rib 213 located outside the positioning protrusion 212, and the cover plate 22 is provided with a mating part 223. The positioning groove 2231 is provided on the mating part 223. The mating part 223 is cylindrical and partially inserted between the arc-shaped reinforcing rib 213 and the positioning protrusion 212.

[0062] By further adding arc-shaped reinforcing ribs 213 and setting a mating part 223 on the cover plate 22, when the bushing plate 21 and the cover plate 22 are mated, the positioning protrusion 212 gradually inserts into the positioning groove 2231 in the mating part 223, and at the same time, the mating part 223 gradually inserts between the arc-shaped reinforcing ribs 213 and the positioning protrusion 212, thereby realizing the bushing plate 21 and the cover plate 22 fitting together, saving space, and improving the overall strength and stability.

[0063] In this embodiment, the cover plate 22 is also provided with a positioning partition, which is connected to the docking part 223. The positioning partition is provided with positioning slots 226, and two positioning slots 226 are symmetrically arranged on both sides of the docking part 223. When the bushing plate 21 and the cover plate 22 are docked, the arc-shaped reinforcing ribs 213 are gradually inserted into the two positioning slots 226. By adding positioning slots 226, the accuracy of the relative installation position of the bushing plate 21 and the cover plate 22 is improved.

[0064] See Figure 2 and Figure 11The reinforcing member 30 includes a first reinforcing member 31, with both ends of the first reinforcing member 31 fixed to two columns 10 respectively. The first reinforcing member 31 is inserted into or abuts against the cover plate 22. By setting the first reinforcing member 31, after both ends of the first reinforcing member 31 are fixed to the two columns 10, the first reinforcing member 31 can reinforce the cover plate 22 from one side, with good reinforcement effect and overall strength, and convenient installation. In this embodiment, the first reinforcing member 31 is set along the Y direction.

[0065] Specifically, the first reinforcing member 31 includes a connecting portion 311 and two abutting portions 312. Both abutting portions 312 are connected to the connecting portion 311. The two ends of the connecting portion 311 are respectively fixed to two columns 10. The two abutting portions 312 are spaced apart for interlocking with or abutting against the cover plate 22. In this embodiment, the first reinforcing member 31 is an integral structure with a U-shaped cross-section, and both abutting portions 312 are interlocked with the cover plate 22.

[0066] See Figures 12 to 14 The reinforcement 30 also includes a second reinforcement 32, one side of which is overlapped and fixed to the side fold of one of the columns 10, and the other side of which abuts against the reinforcing rib 224 of the cover plate 22; the reinforcement 30 also includes a third reinforcement 33, one side of which is overlapped and fixed to the side fold of one of the columns 10, and the other side of which abuts against the plane of the cover plate 22.

[0067] The cover plate 22 can also be reinforced by setting the second reinforcement member 32 and the third reinforcement member 33.

[0068] In this embodiment, four first reinforcing members 31 are spaced apart along the Z direction; the cross-sections of the second reinforcing members 32 and the third reinforcing members 33 are both U-shaped, with one side of the U-shaped reinforcing member 30 fixed to the side fold of the column 10 by screws and the other side abutting against the cover plate 22; the cover plate 22 has a reinforcing rib 224 on the side away from the bushing plate 21, the second reinforcing member 32 is in point contact or line contact with the reinforcing rib 224, and the third reinforcing member 33 is in surface contact with the cover plate 22; each of the second reinforcing members 32 and the third reinforcing members 33 is provided in a set, with two second reinforcing members 32 in the same set facing each other, and two third reinforcing members 33 in the same set facing each other. In other embodiments, the second reinforcing members 32 and the third reinforcing members 33 may not be provided, and only three or four first reinforcing members 31 may be provided. It is understood that the number, specific size, and placement of the first reinforcing members 31, the second reinforcing members 32, and the third reinforcing members 33 can be adaptively adjusted according to the actual situation.

[0069] The following is a detailed description of the usage process of the functional board mounting structure:

[0070] First, fix the two uprights 10 to the cabinet of the low-voltage switchgear. Fix the bushing plate 21 to the two uprights 10 with self-tapping screws. Place the busbar 100 at the first slot 211 of the bushing plate 21. Then assemble the cover plate 22. Insert the protruding bending structure 222 of the cover plate 22 into the guide groove 11 of the upright 10. Move the cover plate 22 in the X direction so that the cover plate 22 gradually approaches the bushing plate 21 (during this process, the positioning protrusion 212 of the bushing plate 21 and the mating part 223 of the cover plate 22 gradually engage and position). When the protruding bending structure 222 is near the position of the limiting groove 12, move the cover plate 22 in the Z direction so that the protruding bending structure 222 is partially inserted into the limiting groove 12. Finally, use screws to lock the bushing plate 21 and the cover plate 22, and set the reinforcement 30 on the outside of the cover plate 22.

[0071] The functional board mounting structure of this embodiment can improve the short-term strength of the functional board module 20 from 80KA to 100KA. The design of guide groove 11 and limiting groove 12 ensures accurate positioning, convenient installation, improves assembly efficiency, and guarantees overall strength.

[0072] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A functional board mounting structure, characterized in that, include: Two uprights (10) are used to fix the cabinet of the low-voltage switchgear; A functional board module (20) is located between two columns (10). The functional board module (20) includes a bushing plate (21) and a cover plate (22). The bushing plate (21) is fixedly connected to the two columns (10). The bushing plate (21) is provided with a first slot (211), and the cover plate (22) is provided with a second slot (221) corresponding to the first slot (211). The bushing plate (21) and the cover plate (22) are fastened and fixedly connected so that the first slot (211) and the second slot (221) are connected to form an accommodating space for the insertion of the busbar (100) of the low-voltage switchgear. The reinforcement member (30) is fixed to the column (10) and located on the side of the cover plate (22) away from the bushing plate (21).

2. The functional board mounting structure according to claim 1, characterized in that, The cover plate (22) is connected to the two columns (10) at both ends.

3. The functional board mounting structure according to claim 2, characterized in that, Each of the columns (10) is provided with a guide groove (11) and a limiting groove (12) communicating with the guide groove (11). Both ends of the cover plate (22) are provided with a raised bending structure (222). The raised bending structure (222) is inserted into the guide groove (11). The raised bending structure (222) can slide in the guide groove (11) along the first direction until it is partially inserted into the limiting groove (12) along the second direction.

4. The functional board mounting structure according to claim 3, characterized in that, The raised bending structure (222) is provided at least two at intervals along the second direction, and the guide groove (11) and the limiting groove (12) are provided one-to-one with the raised bending structure (222).

5. The functional board mounting structure according to claim 3, characterized in that, The limiting groove (12) and the guide groove (11) are provided in a one-to-one correspondence, or each of the guide grooves (11) is connected to a plurality of limiting grooves (12) spaced apart along the first direction.

6. The functional board mounting structure according to claim 1, characterized in that, The reinforcement component (30) includes a first reinforcement component (31), the two ends of which are fixedly connected to the two columns (10), and the first reinforcement component (31) and the cover plate (22) are inserted into each other or abut against each other.

7. The functional board mounting structure according to claim 1, characterized in that, The reinforcement (30) also includes a second reinforcement (32), one side of which is lapped and fixed to the side fold of one of the columns (10), and the other side of which abuts against the reinforcing rib (224) of the cover plate (22). And / or, the reinforcement (30) further includes a third reinforcement (33), one side of which is overlapped and fixed to the side fold of one of the columns (10), and the other side of which abuts against the plane of the cover plate (22).

8. The functional board mounting structure according to claim 1, characterized in that, The bushing plate (21) has a positioning protrusion (212) on the side near the cover plate (22), and the cover plate (22) has a positioning groove (2231) on the side near the bushing plate (21). The positioning protrusion (212) and the positioning groove (2231) are inserted into each other.

9. The functional board mounting structure according to claim 8, characterized in that, The bushing plate (21) is provided with an arc-shaped reinforcing rib (213) located on the outer periphery of the positioning protrusion (212). The cover plate (22) is provided with a butt joint (223). The positioning groove (2231) is provided on the butt joint (223). The butt joint (223) is cylindrical. The butt joint (223) is partially inserted between the arc-shaped reinforcing rib (213) and the positioning protrusion (212).

10. A low-voltage switchgear, characterized in that, It includes a cabinet, a busbar (100), and a functional panel mounting structure as described in any one of claims 1-9.

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