Power distribution cabinet with intelligent short circuit protection device

Abstract

The application discloses a power distribution cabinet with intelligent short-circuit protection device, which aims at solving the problems of heavy weight, space squeezing, complex assembly and high cost of traditional power distribution cabinet caused by angle steel or C-shaped steel framework. The power distribution cabinet comprises a cabinet body with a chamber and at least two cabinet doors, and an intelligent short-circuit protection module is installed in the cabinet body; the cabinet body is composed of a bottom plate, a top plate and a plurality of side plates through a connecting structure, the opening side of the bottom plate and the top plate is bent to form a first closed edge, the opening side of the side plates is bent to form a second closed edge, a partition strip is arranged between the top plate and the bottom plate, the opening side of the partition strip is bent to form a third closed edge, and the three or the first and third closed edges form a frame-shaped closed structure and are attached to the inner wall of the cabinet door. The chamber is provided with a partition plate, the first closed edge is integrally formed and has a track groove, and the partition strip is provided with a sliding block matched with the track groove to compensate for the installation precision of the cabinet door. The application reduces weight and cost, increases installation space, reduces electromagnetic interference, improves sealing performance and assembly efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power distribution box, in particular to a power distribution cabinet with intelligent short-circuit protection device. BACKGROUND

[0002] With the acceleration of industrial automation and the intelligent upgrading of civil power distribution system, power distribution cabinets with intelligent short-circuit protection devices have been widely used in factory workshops, residential areas, commercial complexes and other scenes. The core requirement of this type of power distribution cabinet is to realize millisecond-level identification and cutting of short-circuit faults by integrating high-precision current sensors, fast-breaking circuit breakers and edge computing modules, while ensuring the long-term stable operation of intelligent components in complex environments.

[0003] The current mainstream power distribution cabinet with intelligent short-circuit protection device usually adopts angle steel or C-shaped steel to form a skeleton as support, and then installs a panel and a partition plate on the skeleton to realize the closure of the internal chamber. However, the traditional skeleton structure not only increases the weight and processing and assembly process of the cabinet, but also occupies the internal installation space. The installation of the intelligent short-circuit protection device requires sufficient wiring channels and heat dissipation gaps. If the existing skeleton structure is used, it will lead to compact module layout, enhanced electromagnetic interference between components, affecting the detection accuracy of short-circuit current, and even causing the protection device to trigger incorrectly. At the same time, the existing assembly method of first assembling the skeleton and then installing the panel not only leads to complex cabinet structure, affecting the installation efficiency, but also increases the manufacturing cost of the cabinet. SUMMARY

[0004] The main purpose of the present application is to provide a power distribution cabinet with intelligent short-circuit protection device, which aims to solve the problems of heavy weight, space occupation, complex assembly and high cost of the traditional power distribution cabinet with intelligent short-circuit protection device due to the use of angle steel or C-shaped steel skeleton.

[0005] To achieve the above purpose, the present application provides a power distribution cabinet with intelligent short-circuit protection device, which comprises a cabinet body with a chamber and at least two cabinet doors. The chamber is provided with an intelligent short-circuit protection module. The cabinet body comprises a bottom plate, a top plate and a plurality of side plates. The plurality of side plates are arranged between the top plate and the bottom plate through a connecting structure to form a cavity structure with a closed periphery and an open end. The cabinet doors are rotatably arranged on the cabinet body to close the opening.

[0006] The side edges of the bottom plate and the top plate opposite to the opening are bent outward to form first closing edges. The side edges of the side plates opposite to the opening are bent outward to form second closing edges. A partition strip is arranged between the top plate and the bottom plate. The partition strip is located at the opening and its side edges opposite to the opening are bent outward to form third closing edges.

[0007] The first closing edge, the second closing edge and the third closing edge or the first closing edge and the third closing edge can form a frame-shaped closing structure; the closing structure can be attached to the inner wall of the cabinet door to achieve the closing of the opening.

[0008] In a possible implementation, the first closing edge, the second closing edge and the third closing edge are in L-shaped cross section, and the side of the L-shaped cross section relative to the cabinet door is provided with an abutting surface attached to the inner wall of the cabinet door.

[0009] In a possible implementation, a partition plate corresponding to the position of the partition strip is further arranged in the chamber, the partition plate is used for partitioning the space in the chamber, and one side edge of the partition plate is fixedly connected to the partition strip through a fixing structure.

[0010] In a possible implementation, one side edge of the partition plate relative to the partition strip is bent to form a connecting portion abutting against the inner side of the partition strip; the fixing structure comprises a positioning column and a positioning notch, the positioning column is vertically arranged on the inner side of the partition strip, the positioning notch is arranged on the connecting portion, and the positioning column can be clamped in the positioning notch; further comprising a locking member, the locking member is used for limiting the positioning column from being separated from the positioning notch.

[0011] In a possible implementation, the connecting portion is vertically arranged on one side of the partition plate, and one side surface of the connecting portion is attached to the inner wall of the partition plate; the locking member is a bolt, the diameter of the bolt is greater than the size of the positioning notch, and the locking member can be threadedly connected to the positioning column to lock the connecting portion and the partition strip.

[0012] In a possible implementation, the first closing edge is continuously and integrally formed along the length direction of the opening, and the cabinet door is provided with a avoiding notch matching the first closing edge on the side of the cabinet door relative to the opening, the avoiding notch is used for passing the first closing edge so that the first closing edge can be attached to the inner wall of the cabinet door.

[0013] In a possible implementation, the first closing edge is provided with a track groove extending along the length direction of the first closing edge, and the partition strip is provided with a sliding block slidingly matched with the track groove; the partition strip can slide along the length direction of the first closing edge to adjust the relative position through the cooperation of the sliding block and the track groove; further comprising a locking structure arranged between the partition strip and the first closing edge, the locking structure is used for locking the relative position between the partition strip and the first closing edge.

[0014] In a possible implementation, the locking structure adopts a bolt and nut structure, comprising a screw hole arranged on the sliding block and a through groove arranged on the track groove, a bolt threadedly connected in the screw hole and slidable in the through groove, one end of the bolt connected with the screw hole and the other end of the bolt extending to the outside through the through groove, and a nut threadedly connected with the end of the bolt extending to the outside through the through groove.

[0015] In a possible implementation, the inner wall of the track groove is provided with a magnet, and one side of the sliding block is provided with a magnetic attraction element that can be attracted to the magnet.

[0016] In a possible implementation, the track groove is arranged on the inner side of the first closed edge, and the sliding block is arranged on the outer side of the two ends of the partition strip.

[0017] Compared with the prior art, the application has the following beneficial effects:

[0018] The application directly assembles the cavity by the bottom plate, the top plate and the side plate through the connecting structure by abandoning the traditional skeleton, the first closed edge on the opening side of the bottom plate and the top plate and the second closed edge on the opening side of the side plate are L-shaped and continuously integrally formed, which not only saves the material and processing procedure of the skeleton, reduces the weight and manufacturing cost of the cabinet, but also avoids the occupation of the internal space by the skeleton, reserves sufficient wiring channels and heat dissipation gaps for the intelligent short-circuit protection module, reduces electromagnetic interference caused by compact module layout from the root, guarantees the detection accuracy of the current sensor, prevents the protection device from being triggered by mistake, and meets the core needs of fast identification and cutting of short-circuit faults.

[0019] Meanwhile, the partition strip and the third closed edges on both sides of the opening of the cabinet form a frame-shaped closed structure with the first and second closed edges, and realize close fitting with the avoiding gap of the cabinet door, thereby improving the sealing performance of the cabinet; the partition strip is slidably connected with the track groove on the inner side of the first closed edge through the sliding blocks on both ends, and the core function is to compensate for the installation accuracy of the cabinet door; in view of the size deviation during the processing of the cabinet door or the positional deviation during the on-site installation, the position of the partition strip can be adjusted, so that the partition strip is accurately aligned with the cabinet door, and the collision or excessive gap during the closing of the cabinet door is avoided. In addition, the partition strip has the following additional effects: the magnets on the inner wall of the track groove and the magnetic attraction elements of the sliding block can be pre-positioned, which facilitates the operation during installation; the size of the cavity can be adjusted according to the size of the intelligent module, and the adaptability of the cabinet is improved. The isolation plate corresponding to the partition strip in the cavity is quickly positioned through the connecting part, the positioning column and the positioning gap, and then locked by a bolt, which not only separates the cavities to weaken electromagnetic interference, but also simplifies the installation process and improves the assembly efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from the structures shown in these drawings without any creative effort.

[0021] Figure 1 is a perspective view of the application;

[0022] Figure 2 is an exploded view of the external structure of the application;

[0023] Figure 3 Partial structure diagram of the opening of the embodiment 1 of the present application;

[0024] Figure 4 Partial structure exploded view of the embodiment 1 of the present application;

[0025] Figure 5 Structure diagram of the cabinet door of the embodiment 1 of the present application;

[0026] Figure 6 Sectional view of the first closing edge of the present application;

[0027] Figure 7 Sectional view of the second closing edge of the present application;

[0028] Figure 8 Connection schematic diagram of the isolation plate and the partition plate of the present application;

[0029] Figure 9 Partial structure schematic diagram of the opening of the embodiment 2 of the present application;

[0030] Figure 10 Structure diagram of the cabinet door of the embodiment 2 of the present application;

[0031] Figure 11 Connection structure diagram of the partition strip and the first closing edge of the embodiment 2 of the present application;

[0032] Figure 12 Partial structure diagram of the track slot of the embodiment 2 of the present application;

[0033] Figure 13 Structure schematic diagram of the slider of the embodiment 2 of the present application;

[0034] Explanation of the reference signs:

[0035] 1, cabinet body; 100, bottom plate; 101, top plate; 102, side plate; 2, cavity; 3, cabinet door; 4, intelligent short-circuit protection module; 5, opening; 6, first closing edge; 7, second closing edge; 8, third closing edge; 9, partition strip; 10, closing structure; 11, abutting surface; 12, isolation plate; 120, connection part; 121, positioning column; 122, positioning notch; 13, avoiding notch; 14, track slot; 15, slider; 16, locking structure; 160, through slot; 161, bolt; 162, nut; 163, magnet; 164, magnetic attraction piece.

[0036] The realization of the object, the functional features and the advantages of the present application will be further explained by combining with the embodiments and referring to the drawings. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0038] Embodiment 1

[0039] With reference to Figures 1-8 , the present application proposes a power distribution cabinet with intelligent short-circuit protection device, which comprises a cabinet body 1 with a cavity 2 and at least two cabinet doors 3, and the cavity 2 is used for installing an intelligent short-circuit protection module 4. The cabinet body 1 is composed of a bottom plate 100, a top plate 101 and a plurality of side plates 102. The number of side plates 102 is determined according to the requirement of closing the side of the cabinet body 1. For example, a cuboid cabinet body 1 corresponds to three side plates 102, which cover the remaining three sides except the front side. In this embodiment, the cabinet body 1 is provided with two side plates 102, which cover the left and right sides, respectively. The front and rear sides are closed by the cabinet doors 3 to facilitate opening and closing, thereby facilitating the installation and maintenance of the equipment in the cavity 2.

[0040] Meanwhile, the bottom plate 100, the top plate 101 and the side plates 102 can be connected by welding or bolt 161 fixation to form a cavity structure with openings 5 at the front and rear, and the cabinet doors 3 are rotatably arranged on the side plates 102 on both sides by a hinge structure to realize the opening and closing of the openings 5. The hinge structure can be a hinge. In this embodiment, with reference to Figures 4-5 , the hinge structure comprises a rotating shaft fixed on one side of the side plate 102 and a connecting shaft provided on one side of the cabinet door 3, and the connecting shaft is rotatably arranged on the rotating shaft. The connection between the two shafts simplifies the hinge structure and facilitates installation and production.

[0041] As shown in Figure 2 , a plurality of installation beams commonly used in the prior art power distribution cabinet are arranged in the cavity 2, and the two ends of the installation beams are fixed to the top plate 101 and the bottom plate 100 by bolts 161, respectively. The bolts 161 penetrate the end of the installation beam and the screw hole of the top plate 101 and the bottom plate 100, so that the installation beam and the cabinet body 1 are rigidly connected. A plurality of waist-shaped holes are formed in the installation beam, and the intelligent short-circuit protection module 4 is fixed to the installation beam by bolts 161 penetrating the waist-shaped holes. A terminal block is fixed to the side plate 102 at the rear side of the cavity 2, and the terminal block is connected to the inner wall of the side plate 102 by a support. The two ends of the support are fixed to the terminal block and the side plate 102 by bolts 161, respectively, so that the terminal block and the side plate 102 maintain a stable distance. The terminal block is used to realize the switching of the intelligent short-circuit protection module 4 and the external power distribution circuit. The external circuit is first connected to the terminal block, and then the circuit is connected to the module from the terminal block. This connection mode can regularize the circuit layout, avoid the wiring disorder caused by directly connecting the external circuit to the module, reduce the electromagnetic interference caused by the cross of the circuit, and ensure the stability of the signal transmission of the module.

[0042] In addition, the side plates 102 on the left and right sides of the chamber 2 are provided with louvered heat dissipation holes. The heat dissipation holes are integrally formed with the side plates 102 and are inclined downward. The heat dissipation holes can form air convection with the heat dissipation fan of the module. External cold air enters the chamber 2 from the heat dissipation holes, absorbs the heat generated by the operation of the module, and is discharged from other gaps of the chamber 2, thereby achieving auxiliary heat dissipation. The inclined downward structure can prevent external dust and rain from directly falling into the chamber 2, thereby avoiding the influence of moisture and dust accumulation on the performance of the components. The principle is that air convection carries away heat, and the inclined structure uses gravity to block impurities from entering.

[0043] The intelligent short-circuit protection module 4 is an integrated structure, including a core control unit, a high-precision current acquisition unit, a rapid breaking execution unit, a power module, and a communication interface unit. The high-precision current acquisition unit is connected in series with the power distribution line. The signal output end is connected with the signal input end of the core control unit through a wire. The high-precision current acquisition unit can acquire the current signal in the line in real time and convert it into an electrical signal to transmit to the core control unit. The core control unit is the "brain" of the module. The power input end is connected with the power module to receive stable power supply. The core control unit is connected with the rapid breaking execution unit and the communication interface unit through a wire. The core control unit analyzes and processes the signal transmitted by the current acquisition unit. When it identifies that the current surge meets the characteristics of a short-circuit fault, it immediately sends a cut-off instruction to the rapid breaking execution unit. The rapid breaking execution unit is connected in series with the power distribution line. The control end receives the instruction of the core control unit and quickly cuts off the line to avoid the expansion of the fault. The power module is connected with the external power distribution line through a wire. It converts the external alternating voltage into the direct voltage required by each unit of the module to provide stable power supply for the entire module. The communication interface unit is connected with the core control unit. It can upload the fault information recorded by the core control unit to the background monitoring system and receive the control instruction from the background to realize remote monitoring and control. The principle is to realize bidirectional data transmission through a standardized communication protocol. The above structures are all prior art, so the specific connection structure is not described in detail.

[0044] The specific structure of the cabinet 1 is as follows Figures 3-8As shown, the bottom plate 100 and the top plate 101 are bent outwards from the side edges of the opening 5 to form the first closed edges 6 by a sheet metal bending process; the side plate 102 is also bent outwards from the side edges of the opening 5 to form the second closed edges 7 by a bending process, the cross sections of the first closed edges 6 and the second closed edges 7 are both L-shaped, the vertical segments of the L-shaped structure are perpendicular to and integrally formed with the main body parts of the bottom plate 100, the top plate 101 and the side plate 102, the horizontal segments extend outwards from the cavity 2, and the side of the horizontal segment away from the vertical segment forms a flat abutting surface 11; this bending connection mode makes the closed edges and the main body of the cabinet 1 an inseparable whole, without the need for additional welding or bolt 161 fixation, which improves the structural strength and avoids connection gaps.

[0045] Meanwhile, the cabinet 1 is also provided with a plurality of partition strips 9 at the opening 5, the partition strips 9 are vertically arranged between the top plate 101 and the bottom plate 100, and the upper and lower ends thereof abut against the top plate 101 and the bottom plate 100 respectively; the partition strips 9 are bent to form third closed edges 8 relative to the side edges of the opening 5, the cross sections of the third closed edges 8 are also L-shaped, and the abutting surfaces 11 thereof are in the same plane as the abutting surfaces 11 of the first closed edges 6 and the second closed edges 7; when the cabinet door 3 is closed, the first closed edges 6, the second closed edges 7 and the third closed edges 8 jointly form a frame-shaped closed structure 10, and the abutting surfaces 11 of the three are tightly fitted with the inner wall of the cabinet door 3; this fitting connection can eliminate the gap between the opening 5 of the cabinet 1 and the cabinet door 3, prevent dust and water vapor from invading the cavity 2 from the gap, and ensure the stable operation of the intelligent short-circuit protection module 4 in complex environments.

[0046] Since the existing cabinet door 3 has a reinforcing portion formed by bending the four side edges thereof towards the cabinet 1, in order to ensure that the side edges of the cabinet door 3 do not interfere with the first closed edges 6, in the present embodiment, the first closed edges 6 are divided into a plurality of segments, the number and length of which are adapted to the number and width of the cabinet door 3, so as to ensure that the first closed edges 6 can be fitted with the inner wall of the cabinet door 3. Meanwhile, in order to further improve the sealing between the cabinet door 3 and the closed edges, a rubber sealing strip can be arranged at the connection between the closed edges and the inner wall of the cabinet door 3 to improve the sealing performance.

[0047] As for the partition strips 9, the number thereof is related to the number of the cabinet doors 3; if the cabinet door 3 is provided with two, the partition strips 9 are provided with one; in the present embodiment, the cabinet door 3 is provided with three at the front side of the distribution box, and the cabinet door 3 is provided with two at the rear side, therefore, the partition strips 9 located at the front side opening 5 are provided with three, and the partition strips 9 located at the rear side opening 5 are provided with one, and the connection structures between all the partition strips 9 and the first closed edges 6 are the same.

[0048] Among the three cabinet doors 3, one cabinet door 3 is connected to one of the partition strips 9 through a hinge structure, so as to realize the installation of the cabinet door 3.

[0049] Additionally, a partition plate 12 can be installed within chamber 2 to divide chamber 2 into multiple sub-chambers 2, such as... Figure 8 As shown, the partition plate 12 is made of metal. Its edge near the partition strip 9 is bent to form a connecting part 120. The connecting part 120 is perpendicular to the main body of the partition plate 12, and the outer side wall of the connecting part 120 is in close contact with the inner side wall of the partition strip 9. This contact relationship provides initial positioning for the connection between the partition plate 12 and the partition strip 9, and avoids the partition plate 12 from shifting during installation. A positioning post 121 is vertically fixed on the inner wall of the partition strip 9. The positioning post 121 is connected to the partition strip 9 by bolts 161 or welded. The connecting part 120 of the partition plate 12 has a positioning notch 122 that matches the positioning post 121. The positioning post 121 can be inserted into the positioning notch 122 to form a preliminary mechanical limit. The fixing structure also includes a bolt 161 as a locking element. The diameter of the bolt 161 is larger than the width of the positioning notch 122. The bolt 161 is threadedly connected to the positioning post 121. When the bolt 161 is tightened, the head of the bolt 161 presses against the outer wall of the connecting part 120, so that the positioning post 121 cannot be disengaged from the positioning notch 122, thereby achieving rigid fixing of the partition plate 12 and the partition strip 9. This locking connection can prevent the partition plate 12 from loosening due to vibration or external force.

[0050] Compared to the "angle steel / C-shaped steel frame + panel splicing" design commonly used in existing power distribution cabinets, the cabinet 1 connection structure of this invention significantly optimizes lightweighting, ease of installation, and space utilization. Existing technologies require assembling an independent frame first, then fixing the base plate 100, top plate 101, and side plate 102 to the frame. This not only increases the overall load on the cabinet 1 but also encroaches on the installation space within the chamber 2, limiting the wiring and heat dissipation of the intelligent short-circuit protection module 4. In contrast, this invention directly connects the base plate 100, top plate 101, and side plate 102 via welding or bolts 161, eliminating the need for a frame structure. This makes the cabinet 1 lighter, facilitating transportation and on-site installation, while also freeing up internal space in the chamber 2, providing conditions for flexible layout of the intelligent module. Furthermore, it reduces the cumbersome "frame assembly" process, shortening the overall processing cycle.

[0051] Regarding the hinge connection of cabinet door 3, existing technologies mostly use a hinge structure composed of multiple parts. During installation, it is necessary to precisely align multiple sets of holes on the cabinet body 1 and cabinet door 3. Even a slight deviation will cause the cabinet door 3 to jam when opening and closing, and it is also troublesome to disassemble and reassemble later. The hinge structure of the present invention consists only of a rotating shaft fixed to the side plate 102 and a connecting shaft on the side of the cabinet door 3. The cabinet door 3 is opened and closed by the rotation of the two shafts. The number of parts is reduced, and there is no need to repeatedly calibrate the hole positions during installation. Assembly can be completed simply by fitting the connecting shaft into the rotating shaft, which greatly simplifies the operation and makes the rotation smoother. It is also more convenient to disassemble and reassemble the cabinet door 3 later, reducing the difficulty of maintenance.

[0052] In the setting and adaptability of the partition strip 9, the prior art partition strip 9 is mostly fixed on the framework, the position cannot be adjusted according to the number of cabinet doors 3, and the adaptability is poor; the number of the partition strip 9 of the present application flexibly changes with the number of cabinet doors 3, and the connection structure with the first closed edge 6 is uniform, which not only can adapt to different layouts of cabinet doors 3, but also can install cabinet doors 3 through the partition strip 9, further optimizes the opening and closing layout of the cabinet body 1 opening 5, makes the overall structure more in line with the actual use demand, and improves the operation convenience.

[0053] Embodiment 2

[0054] Reference Figures 9-13 On the basis of embodiment 1, the first closed edge 6 is made by continuous integral molding process, and there is no any segmentation splicing or gap along the length direction of the cabinet body 1 opening 5. This integral molding connection mode makes the first closed edge 6 become a complete continuous structure, avoids the joint gap caused by the splicing of the traditional segmented closed edge, can eliminate the impurity invasion path at the joint, and further improves the sealing performance of the cabinet body 1 opening 5. Figure 10 As shown in the figure, the side edge of the cabinet door 3 relative to the opening 5 is provided with a relief gap 13 matched with the first closed edge 6. The shape of the relief gap 13 is completely consistent with the L-shaped cross section of the first closed edge 6. When the cabinet door 3 is closed, the first closed edge 6 can be embedded in the relief gap 13 to form an "embedded" connection. This connection can avoid the interference between the first closed edge 6 and the edge of the cabinet door 3, prevent the cabinet door 3 from being unable to be completely closed due to interference, and make the abutting surface 11 of the first closed edge 6 fully fit with the non-gap area of the inner wall of the cabinet door 3, further reduce the gap, and rubber sealing strips can be arranged at the connection to improve the waterproof effect.

[0055] In addition, in terms of manufacturing and processing, the integral molding and continuous design of the first closed edge 6 significantly simplifies the processing flow and improves the structural precision compared with the traditional segmented closed edge structure. The traditional segmented closed edge needs to be cut into multiple segments first, and then spliced into a whole through welding, riveting or other methods. Subsequently, the splicing part needs to be polished to eliminate burrs and gaps, which is a complicated process and is prone to errors due to splicing operation. The integral molding and continuous design directly processes the whole plate through sheet metal continuous bending process, without the need for cutting, segmenting and splicing steps. Its principle is to cooperate with special molds and numerical control equipment to make the plate complete bending forming in a single processing, which not only reduces the number of processing links, but also avoids the positioning deviation between segments during segmentation and splicing, and eliminates the polishing process after splicing, greatly improving the manufacturing efficiency while ensuring the consistency of the overall size of the first closed edge 6, avoiding the subsequent matching problems with the cabinet door 3 and the partition strip 9 caused by segmentation errors.

[0056] In terms of installation, the design also has obvious advantages compared with traditional structures. When installing the traditional segmented closure edge, it is necessary to align and fix the closure edge with the top plate 101 and the bottom plate 100 of the cabinet body 1 segment by segment. Not only does it need to ensure the accurate installation position of a single segment of the closure edge, but also it needs to adjust the joint gap between the segments to prevent misalignment or excessive gap. The installation is time-consuming and requires high technical requirements for the operator. The integrally formed continuous first closure edge 6 can be positioned and fixed as a whole with the top plate 101 and the bottom plate 100 during installation, without the need for segment-by-segment alignment and adjustment. It only needs to be connected through the pre-set mounting hole and the cabinet body 1 main body by the bolt 161. The principle is that the integrity of the continuous structure provides a unified positioning reference, eliminating the need for additional coordination of the positional relationship between multiple segments, greatly simplifying the installation steps and shortening the installation time.

[0057] As shown in Figures 11-13 The inner side wall of the first closure edge 6 is provided with a track groove 14 extending in the length direction thereof, and the track groove 14 is an integrally formed structure with the first closure edge 6. The upper and lower ends of the partition strip 9 are respectively provided with a sliding block 15 fixed thereon, and the sliding block 15 is integrally formed with the partition strip 9 or fixed by the bolt 161. The shape of the sliding block 15 matches the track groove 14, and the sliding block 15 can be embedded in the track groove 14 and freely slide in the length direction of the track groove 14. The sliding connection of the "sliding block 15-track groove 14" allows the partition strip 9 to adjust the position in the length direction of the first closure edge 6, which can adapt to the size deviation during the installation of the cabinet door 3 or the on-site installation offset, such as the size error during the production of the cabinet door 3, the alignment deviation of the cabinet body 1 after being fixed and the cabinet door 3, to ensure that the partition strip 9 can be accurately aligned with the cabinet door 3, so that each sub-chamber 2 is exactly covered by the corresponding cabinet door 3.

[0058] To fix the adjusted position of the partition strip 9, a locking structure 16 is provided between the partition strip 9 and the first closure edge 6. The locking structure 16 adopts a combination of a bolt 161 and a nut 162. A screw hole is formed in the sliding block 15, and a through groove 160 extending in the length direction of the track groove 14 is formed in the groove bottom of the track groove 14. One end of the bolt 161 is threadedly connected with the screw hole of the sliding block 15 after penetrating through the through groove 160, and the other end extends to the outside of the first closure edge 6 and is threadedly connected with the nut 162. When the partition strip 9 is adjusted to the target position, the nut 162 is tightened, the nut 162 is tightly pressed against the outer side wall of the first closure edge 6, and the head of the bolt 161 is tightly pressed against the inner side wall of the sliding block 15, forming a "double-directional pressing" connection. This connection generates a static friction force between the sliding block 15 and the track groove 14 through the thread pre-tightening force of the bolt 161 and the nut 162. The static friction force can resist the displacement tendency of the partition strip 9 due to vibration or external force, achieving stable locking of the position of the partition strip 9.

[0059] In addition, the inner wall of the track slot 14 is fixed with a magnet 163, which is in strip shape and is installed on one side of the through slot 160. The side of the sliding block 15 facing the track slot 14 is fixed with a magnetic attraction piece 164, such as a metal sheet, which is fixed to one side of the sliding block 15. The magnet 163 and the magnetic attraction piece 164 can generate mutual attraction force. This "magnetic attraction type" connection can provide predetermined positioning for the partition strip 9. When the partition strip 9 is slid, the attraction force between the magnet 163 and the magnetic attraction piece 164 can temporarily fix the partition strip 9 at the current position, so that the partition strip 9 does not slide randomly when the installer releases his hand, facilitating the operation of the locking structure 16 and improving the installation efficiency. At the same time, when the locking structure 16 is not completely tightened, the magnetic attraction force can prevent the partition strip 9 from being displaced due to transportation vibration or slight collision on site.

[0060] At the same time, a rubber sheet is also arranged on one side of the through slot 160. The rubber sheet can be two pieces or one piece with a notch in the middle, which can cover and close the through slot 160, thereby achieving the effects of waterproofing and dustproofing.

[0061] The same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components; in the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationship in the drawings are only used for exemplary illustration, and cannot be understood as a limitation of the present patent, for those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0062] The above is only a preferred embodiment of the present application, and does not limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A power distribution cabinet with intelligent short-circuit protection device, comprising a cabinet body (1) with a chamber (2) and at least two cabinet doors (3), wherein an intelligent short-circuit protection module (4) is installed in the chamber (2), characterized in that, The cabinet body (1) includes a bottom plate (100), a top plate (101), and a plurality of side plates (102), the plurality of side plates (102) are arranged between the top plate (101) and the bottom plate (100) through a connecting structure, a cavity structure with a closed periphery and an opening (5) on one end face is formed, and the cabinet door (3) is rotationally arranged on the cabinet body (1) and used for closing the opening (5); The bottom plate (100) and the top plate (101) are respectively provided with a first closing edge (6) which is outwardly bent from a side edge of the bottom plate (100) and the top plate (101) and located outside the cavity (2); the side plate (102) is provided with a second closing edge (7) which is outwardly bent from a side edge of the side plate (102) and located outside the cavity (2); and the cabinet body (1) further comprises a partition strip (9) arranged between the top plate (101) and the bottom plate (100), the partition strip (9) is located at the opening (5) and is provided with a third closing edge (8) which is outwardly bent from two side edges of the partition strip (9) and located outside the cavity (2). The first closing edge (6), the second closing edge (7) and the third closing edge (8) or the first closing edge (6) and the third closing edge (8) form a frame-shaped closing structure (10); and the closing structure (10) is attached to an inner wall of the cabinet door (3) to close the opening (5). The first closing edge (6) is continuously and integrally formed along a length direction of the opening (5), and the cabinet door (3) is provided with a relief notch (13) which is matched with the first closing edge (6) and located at a side of the cabinet door (3) relative to the opening (5), the relief notch (13) is used for allowing the first closing edge (6) to pass through so that the first closing edge (6) is attached to the inner wall of the cabinet door (3). The first closing edge (6) is provided with a track groove (14) which extends along a length direction of the first closing edge (6), the partition strip (9) is provided with a sliding block (15) which is slidably connected with the track groove (14); the partition strip (9) is slidably connected with the first closing edge (6) along the length direction of the first closing edge (6) through the sliding block (15) and the track groove (14) to adjust a relative position of the partition strip (9) and the first closing edge (6); and the cabinet body (1) further comprises a locking structure (16) arranged between the partition strip (9) and the first closing edge (6), the locking structure (16) is used for locking the relative position of the partition strip (9) and the first closing edge (6).

2. A power distribution unit with intelligent short circuit protection as claimed in claim 1, wherein, The first closing edge (6), the second closing edge (7) and the third closing edge (8) are L-shaped in cross section, and are provided with an abutting surface (11) which is attached to an inner wall of the cabinet door (3) and located at a side of the first closing edge (6), the second closing edge (7) and the third closing edge (8) relative to the cabinet door (3).

3. A power distribution unit with intelligent short circuit protection as claimed in claim 2, wherein, The cavity (2) is further provided with an isolation plate (12) which corresponds to a position of the partition strip (9) and is used for dividing a space in the cavity (2), and a side edge of the isolation plate (12) is fixedly connected with the partition strip (9) through a fixing structure.

4. A power distribution unit with intelligent short circuit protection as claimed in claim 3, wherein, The connecting part (120) is vertically arranged on one side of the isolation plate (12), and one side surface of the connecting part (120) is attached to the inner wall of the partition plate; the locking member is a bolt (161), which has a diameter greater than the size of the positioning notch (122), and the locking member can be threadedly connected to the positioning column (121) to lock the connecting part (120) and the partition strip (9).

5. A power distribution unit with intelligent short circuit protection as claimed in claim 4, wherein, The connecting part (120) is vertically arranged on one side of the isolation plate (12), and one side surface of the connecting part (120) is attached to the inner wall of the partition plate; the locking member is a bolt (161), which has a diameter greater than the size of the positioning notch (122), and the locking member can be threadedly connected to the positioning column (121) to lock the connecting part (120) and the partition strip (9).

6. A power distribution unit with intelligent short circuit protection as claimed in claim 1, wherein, The locking structure (16) adopts a bolt (161) and nut (162) structure, which includes a threaded hole arranged on the sliding block (15) and a through groove (160) arranged on the track groove (14), the threaded hole is threadedly connected with the bolt (161) which can slide in the through groove (160), one end of the bolt (161) is connected with the threaded hole, and the other end can extend to the outside through the through groove (160), and the end of the bolt (161) penetrating through the through groove (160) is threadedly connected with the nut (162).

7. A power distribution unit with intelligent short circuit protection as claimed in claim 6, wherein, The inner wall of the track groove (14) is provided with a magnet (163), and one side of the sliding block (15) is provided with a magnetic attraction member (164) which can be attracted to the magnet (163).

8. A power distribution unit with intelligent short circuit protection as claimed in claim 1, wherein, The track groove (14) is arranged on the inner side of the first closed edge (6), and the sliding block (15) is arranged on the outer side surface of the two ends of the partition strip (9).

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