An easily expandable display cabinet

Abstract

The present invention belongs to the technical field of electric cabinets, and in particular, relates to an easily expandable electric cabinet, including a cabinet body, a main circuit component, and a load branch circuit component. The cabinet body is composed of an inner cabinet component and an outer cabinet component that are telescopically changeable with each other. The main circuit component is used to control and protect three main circuits connected to the cabinet body, and the load branch circuit component is used to expand and control the branch circuit at the end of the branch circuit in the cabinet body. The cabinet body of the present invention is a telescopic cabinet body composed of an inner cabinet component and an outer cabinet component. It can be telescopically deformed at any time according to the actual expansion requirements of the load branch in the cabinet body, ensuring that the space in the cabinet body matches the number of internal load branches and will not appear crowded due to the expansion of the load branches, thereby ensuring that the heat dissipation effect in the cabinet body is not affected and electrical faults are not likely to occur in the cabinet body due to the good heat dissipation effect.

Description

Technical Field

[0001] The invention belongs to the technical field of display cabinets, and in particular relates to an easily expandable display cabinet. Background Art

[0002] The power cabinet is a device used to manage and distribute the power of the mains or uninterruptible power supply (UPS) in data centers, communication rooms and other places. It is usually located at the end of the cabinet and is responsible for receiving, distributing and monitoring power to ensure that key equipment such as network equipment and servers have a stable power supply. The management function of the power cabinet is relatively powerful. It can monitor electrical parameters and switch status, and has advanced functions such as detecting neutral current and dynamically adjusting three-phase imbalance.

[0003] Traditional power cabinets are designed according to load conditions, which involves the size of the outer shell and the number of internal components. When the number of internal components needs to be expanded later, the number of internal components of the power cabinet increases and becomes crowded because the outer shell cannot be enlarged, resulting in insufficient heat dissipation and prone to electrical failures.

[0004] It is foreseeable that telescopic cabinets are one of the technical solutions to the above problems, but a certain telescopic state of the cabinet may be maintained for many years, so that the cabinet will not be in the maximum size state most of the time, resulting in a high cost of telescopic cabinets. Furthermore, in order to ensure the strength of each other, the two telescopic cabinets of the telescopic cabinet are welded by the frame and the panel. Fig. 22 As described above, the use of the frame affects the mutual fit between the upper panels of the inner and outer cabinets, resulting in a large gap and an unsightly appearance.

[0005] When the load branch inside the cabinet is expanded, since the expanded load branch includes a branch circuit breaker, a branch current transformer and needs to be connected to the corresponding lines, the expansion of the load branch is limited by the space inside the cabinet, which makes the installation and wiring of the components in the branch difficult, and it is easy to cause short circuits or electric shocks, and it is very easy to touch the components adjacent to the load branch, which is less safe. For example, patent 202222436149.7 discloses that the side panels can be opened to increase the operating space, but there are still a lot of wiring in the cabinet.

[0006] In view of the power demand of the load branch, the models of components such as circuit breakers and current transformers in the load branch may be different. However, the current cabinet body cannot arrange components of different models in an overall regular manner, and cannot fully utilize the existing space to arrange components of different models.

[0007] The present invention designs an easily expandable display cabinet to solve the above problems. Summary of the invention

[0008] Based on this, it is necessary to provide an easily expandable cabinet for the problems existing in the current cabinets. The cabinet of the present invention is a telescopic cabinet composed of an inner cabinet component and an outer cabinet component, which can be telescopically deformed at any time according to the actual expansion requirements of the load branches in the cabinet, ensuring that the space in the cabinet matches the number of internal load branches and will not appear crowded due to the expansion of the load branches, thereby ensuring that the heat dissipation effect in the cabinet is not affected and that electrical faults are not likely to occur in the cabinet due to the good heat dissipation effect. The outer cabinet component constituting a part of the cabinet in the present invention ensures the sealing of the cabinet by installing an extension plate on the outer cabinet component after the cabinet changes from small to large, so that the outer cabinet component can increase or decrease the extension plate according to the actual contraction or expansion needs of the cabinet, reducing the cost of the cabinet in the use of small capacity space. In the process of telescopic deformation, the inner cabinet component and the outer cabinet component of the cabinet in the present invention can always maintain panel contact between the two without a large gap, have good sealing, and make the cabinet look more beautiful. The load branch assembly in the present invention is a modular design that integrates the second current transformer and the second circuit breaker and is plug-in compatible with the main line copper busbar assembly, so there is no need to install the second current transformer and the second circuit breaker in the cabinet and connect the two. While ensuring that the load branch assembly is neatly arranged without short circuit and electric shock, it will not touch the components in the adjacent load branch assembly, and the operation of load branch expansion is convenient and efficient. The load branch assembly in the present invention can be equipped with different models of second circuit breakers or second current transformers as needed. The cabinet in the present invention can allow the load branch assemblies equipped with different models of second circuit breakers or second current transformers to be neatly arranged and installed, and at the same time, the second current transformers or second circuit breakers in adjacent load branch assemblies will not interfere due to different quotation marks.

[0009] The above purpose is achieved through the following technical solutions:

[0010] An easily expandable power supply cabinet for managing electrical energy, comprising:

[0011] The cabinet body is composed of an inner cabinet component and an outer cabinet component which are telescopically changeable with each other.

[0012] The main circuit components are used to control and protect the three main circuits connected to the cabinet.

[0013] A load branch circuit component is used to expand and control the branch circuit at the end of the branch circuit in the cabinet, and the load branch circuit component includes a vertical slat, which is installed in the cabinet through two bracket assemblies, and the slat is provided with two first slide grooves corresponding to the bracket assemblies one by one, and a shift block is vertically slid in the first slide groove, and the shift block is connected to the fixed plate on the slat through a return spring, and a second clamping block is arranged on the shift block, and two first clamping blocks corresponding to the second clamping blocks are arranged on the slat, and the first clamping block and the corresponding second clamping block form a trapezoidal clamping groove matched with the corresponding bracket assembly, and a slide seat is slidably arranged on the upper end guide seat of the slat, A second screw and an electric contact electrically connected to the main circuit are welded to the lower end and the upper end of the slide seat respectively; the second screw moves in the second slide groove on the guide seat; a locking nut is arranged on the second screw; a clamp is welded to the lower end of the second screw; a branch line is installed in the socket on the clamp; a third screw for pressing the branch line in the socket is arranged in the threaded hole on the clamp; a torsion wheel is arranged at the lower end of the third screw; a second current transformer for inductively drawing power from the branch line and a second circuit breaker for controlling the branch line are installed on the slats through a fixing assembly; the switch of the second circuit breaker is tightly connected to the dial block below it through a pull rope.

[0014] In one embodiment, the inner cabinet assembly includes a first frame, two guide grooves are provided on the front and rear sides of the upper end of the first frame, two first guide rods are provided on the front and rear sides of the lower end of the first frame, the top, bottom, left side, rear side and front side of the first frame are respectively provided with a first top panel, a first bottom panel, a first side panel, a first back panel and a first cabinet door, a slot is provided on the right side of the lower end of the first frame, and four support leg assemblies are provided at the lower end of the first frame.

[0015] In one embodiment, the outer cabinet assembly includes a second frame, two second guide rods corresponding to the guide grooves are arranged on the front and rear sides of the upper end of the second frame, two sliding sleeves corresponding to the first guide rods are arranged on the front and rear sides of the lower end of the second frame, the top, right side, rear side and front side of the first frame are respectively provided with a second top panel, a second side panel, a second back panel and a second cabinet door, a second bottom panel matching the slot is arranged inside the lower end of the second frame, and four support leg assemblies are arranged at the lower end of the first frame.

[0016] In one of the embodiments, a ground copper bar assembly and an intelligent collector electrically connected to the second current transformer in the load branch assembly are arranged at the bottom of the first frame, the ground copper bar assembly includes a third copper bar whose left end is installed with two second connecting plates through connecting bolts, the second connecting plates are fixed in the first frame through connecting bolts, a fourth copper bar is slidably mounted on the right end of the third copper bar, two second connecting plates are installed on the right end of the fourth copper bar through connecting bolts, the second connecting plate is connected to the second frame through connecting bolts, and a second locking screw matching the third copper bar is arranged in the threaded hole on the fourth copper bar.

[0017] In one embodiment, the support leg assembly includes a sleeve, which is disposed at the lower end of the first frame or the second frame. The sleeve is internally threaded with a first screw rod, and a foot pad is disposed at the lower end of the first screw rod.

[0018] In one embodiment, a sealing strip that cooperates with the first top plate is provided on the inner side of the second top plate, a sealing strip that cooperates with the first back plate is provided on the inner side of the second back plate, a sealing strip that cooperates with the first bottom plate is provided on the inner side of the second bottom plate, and a sealing strip that cooperates with the first door is provided on the inner side of the second cabinet door. The second top plate, the second back plate and the second cabinet door can all be installed with an extension plate by connecting bolts, and a sealing strip that cooperates with the first top plate, the first back plate and the first cabinet door is provided on the inner side of the extension plate.

[0019] In one embodiment, the main line assembly includes a main switch, a lightning arrester, and a first circuit breaker for controlling three main lines. The main switch, several lightning arresters and several first circuit breakers are installed on a bracket in a first frame. Three first current transformers for respectively sensing power from the three main lines are installed on the bracket. The ends of the three main lines are electrically connected to three main line copper busbar assemblies respectively, and the main line copper busbar assemblies are plugged into and matched with electrical contacts.

[0020] In one of the embodiments, the main line copper bar assembly includes a first copper bar electrically connected to the main line and plugged with the electrical contact, the left end of the first copper bar is installed with two first connecting plates by connecting bolts, the first connecting plate is fixed in the first frame by connecting bolts, the right end of the first copper bar is slidably sleeved with a second copper bar plugged with the electrical contact, the right end of the second copper bar is installed with two first connecting plates by connecting bolts, the first connecting plate is connected to the second frame by connecting bolts, and the threaded hole on the second copper bar is provided with a first locking screw that cooperates with the first copper bar.

[0021] In one of the embodiments, the fixing assembly includes a first clamp block for installing a second current transformer or connecting a second circuit breaker through a trapezoidal seat, a second clamp block is hingedly connected to one side end of the first clamp block, a fastening bolt is rotatably arranged in a circular hole on the other side of the first clamp block, the fastening bolt cooperates with a slot on the same side end of the second clamp block, and a nut is threadedly connected to the fastening bolt so that the first clamp block and the second clamp block clamp the corresponding slats.

[0022] In one embodiment, the bracket assembly includes a first cross bar with a trapezoidal cross section, a second cross bar with a trapezoidal cross section is slidably arranged on the first cross bar, a dovetail groove and a dovetail guide bar are matched between the first cross bar and the second cross bar, the left end of the first cross bar is fixed to the first frame by a connecting bolt, and the right end of the second cross bar is fixed to the second frame by a connecting bolt.

[0023] The beneficial effects of the present invention are:

[0024] 1. The cabinet of the present invention is a telescopic cabinet composed of an inner cabinet component and an outer cabinet component. It can be telescopically deformed at any time according to the actual expansion requirements of the load branches in the cabinet, ensuring that the space in the cabinet matches the number of internal load branches and will not appear crowded due to the expansion of the load branches, thereby ensuring that the heat dissipation effect in the cabinet is not affected and electrical failures are not likely to occur in the cabinet due to the good heat dissipation effect.

[0025] 2. The outer cabinet assembly constituting a part of the cabinet in the present invention ensures the sealing of the cabinet by installing an extension plate on the outer cabinet assembly after the cabinet is enlarged from small to large, so that the outer cabinet assembly can increase or decrease the extension plate according to the actual contraction or expansion needs of the cabinet, thereby reducing the cost of the cabinet in the process of using a small capacity space.

[0026] 3. The inner cabinet component and the outer cabinet component of the cabinet body in the present invention can always maintain panel contact between the two without a large gap during the process of telescopic deformation, have good sealing performance, and make the cabinet body look more beautiful.

[0027] 4. The load branch assembly in the present invention is a modular design that integrates the second current transformer and the second circuit breaker and is plug-in compatible with the main line copper busbar assembly, so there is no need to install the second current transformer and the second circuit breaker in the cabinet and connect the two. While ensuring that the load branch assembly is neatly arranged to prevent short circuits and electric shocks, it will not touch the components in adjacent load branch assemblies. The operation of load branch expansion is convenient and efficient.

[0028] 5. The load branch components in the present invention can be equipped with second circuit breakers or second current transformers of different models as needed. The cabinet in the present invention can allow the load branch components equipped with second circuit breakers or second current transformers of different models to be neatly arranged and installed, while ensuring that the second current transformers or second circuit breakers in adjacent load branch components will not interfere with each other due to different reference marks. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of two states of the present invention;

[0030] Figure 2 is an overall side sectional view of the present invention;

[0031] Figure 3 It is a cross-sectional view of the installation structure of the main line copper bar assembly in the present invention;

[0032] Figure 4 These are two cross-sectional views of the load branch assembly, the main line copper busbar assembly and the bracket assembly;

[0033] Figure 5 is a cross-sectional view of the installation structure of the second current transformer in the load branch assembly;

[0034] Figure 6 is a cross-sectional view of the installation structure of the second circuit breaker in the load branch assembly;

[0035] Figure 7 is a load branch circuit assembly and a cross-sectional view thereof in the present invention;

[0036] Figure 8 is a cross-sectional view of the mounting structure of the bracket assembly in the present invention;

[0037] Fig. 9 are two schematic diagrams of the bracket assembly of the present invention;

[0038] Fig.10 It is a ground copper bar assembly and a cross-sectional view thereof in the present invention;

[0039] Fig.11 These are two cross-sectional views of the sealing cooperation between the inner cabinet component and the outer cabinet component of the cabinet;

[0040] Fig.12 is a cross-sectional view of the sealing cooperation between the first bottom plate of the inner cabinet assembly and the second bottom plate of the outer cabinet assembly;

[0041] Fig.13 are two schematic diagrams of the inner cabinet components;

[0042] Fig.14 are two cross-sectional views of the inner cabinet assembly;

[0043] Fig.15 are two schematic diagrams of the outer cabinet assembly;

[0044] Fig.16 These are two schematic diagrams of the outer cabinet assembly after the extension plate is added;

[0045] Fig.17 is a cross-sectional view of the leg assembly;

[0046] Fig.18 These are two cross-sectional views of the seal fit between the extension plate on the outer cabinet assembly and the inner cabinet assembly;

[0047] Fig.19 It is a cross-sectional view of the internal structure of the cabinet in the extreme contraction state and the internal structure in the expansion state;

[0048] Fig. 20 It is a cross-sectional view of the arrangement of second circuit breakers or second current transformers of different types in the cabinet;

[0049] Fig.21 It is a top sectional view of the structure of the present invention;

[0050] Fig. 22 It is a schematic diagram of the existing telescopic cabinet structure;

[0051] Name of the label in the figure:

[0052] 100, cabinet body; 101, inner cabinet assembly; 102, first frame; 104, guide groove; 105, first guide rod; 106, slot; 107, first top plate; 108, first bottom plate; 109, first side plate; 110, first back plate; 111, first cabinet door; 112, support leg assembly; 113, sleeve; 114, first screw rod; 115, foot pad; 116, outer cabinet assembly; 117, second frame; 118, second guide rod; 119, sliding sleeve; 120, second top plate; 121, second bottom plate; 122, second side plate; 123, second back plate; 124, second cabinet door; 125, sealing strip; 126, extension plate;

[0053] 200, main line assembly; 201, main switch; 202, lightning arrester; 203, first circuit breaker; 204, main line; 205, first current transformer; 206, main line copper bar assembly; 207, first copper bar; 208, first connecting plate; 209, second copper bar; 210, first locking screw;

[0054] 300, load branch assembly; 301, slat; 302, first slide; 303, first clamp; 304, shift block; 305, second clamp; 306, reset spring; 307, fixing assembly; 308, first clamp; 309, fastening bolt; 310, second clamp; 311, second current transformer; 312, branch line; 313, trapezoidal seat; 314, second circuit breaker; 315, pull rope; 316, guide seat; 317, second slide; 318, slide seat; 319, electric contact; 320, second screw; 321, locking nut; 322, clamp; 323, jack; 324, third screw; 325, torsion wheel;

[0055] 401. intelligent collector; 402. connecting bolt;

[0056] 500, bracket assembly; 501, first crossbar; 502, second crossbar;

[0057] 600, ground copper bar assembly; 601, third copper bar; 602, fourth copper bar; 603, second locking screw; 604, second connecting plate. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0059] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0060] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0061] like Figure 1-21 As shown, an easily expandable terminal cabinet for managing electric energy includes:

[0062] The cabinet body 100 is composed of an inner cabinet component 101 and an outer cabinet component 116 that are telescopically movable with respect to each other.

[0063] The main circuit assembly 200 is used to control and protect the three main circuits connected to the cabinet 100 .

[0064] The load branch circuit assembly 300 is used to expand and control the branch circuit at the end of the branch circuit in the cabinet 100. The load branch circuit assembly 300 includes a vertical slat 301, and the slat 301 is installed in the cabinet 100 through two bracket assemblies 500. Two first slide grooves 302 corresponding to the bracket assemblies 500 are provided on the slat 301. A shift block 304 slides vertically in the first slide groove 302. The shift block 304 is connected to the fixed plate on the slat 301 through a reset spring 306. A second clamping block 305 is provided on the shifting block 304. Two first clamping blocks 303 corresponding to the second clamping blocks 305 are provided on the slat 301. The first clamping block 303 and the corresponding second clamping block 305 form a trapezoidal clamping groove that cooperates with the corresponding bracket assembly 500. A slide seat 318 is slidably provided on the upper end guide seat 316 of the slat 301. A second screw 320 and an electric contact 319 electrically connected to the main circuit are welded to the lower end and the upper end of the seat 318 respectively. The second screw 320 moves in the second slide groove 317 on the guide seat 316. A locking nut 321 is provided on the second screw 320. A clamp 322 is welded to the lower end of the second screw 320. The branch line 312 is installed in the socket 323 on the clamp 322. A third screw 324 for pressing the branch line 312 in the socket 323 is provided in the threaded hole on the clamp 322. A torsion wheel 325 is provided at the lower end of the third screw 324. A second current transformer 311 for inductively drawing power from the branch line 312 and a second circuit breaker 314 for controlling the branch line 312 are installed on the slat 301 through a fixing assembly 307. The switch of the second circuit breaker 314 is tightly connected to the shift block 304 below it through a pull rope 315.

[0065] In a further embodiment, Figure 1 As shown, the inner cabinet assembly 101 includes a first frame 102, two guide grooves 104 are arranged on the front and rear sides of the upper end of the first frame 102, two first guide rods 105 are arranged on the front and rear sides of the lower end of the first frame 102, the top, bottom, left side, rear side and front side of the first frame 102 are respectively provided with a first top plate 107, a first bottom plate 108, a first side plate 109, a first back plate 110 and a first cabinet door 111, a slot 106 is arranged on the right side of the lower end of the first frame 102, and four support leg assemblies 112 are arranged at the lower end of the first frame 102.

[0066] In a further embodiment, Fig.13 , 14 As shown, the outer cabinet assembly 116 includes a second frame 117, and two second guide rods 118 corresponding to the guide groove 104 are arranged on the front and rear sides of the upper end of the second frame 117, and two sliding sleeves 119 corresponding to the first guide rod 105 are arranged on the front and rear sides of the lower end of the second frame 117. The top, right side, rear side and front side of the first frame 102 are respectively provided with a second top plate 120, a second side plate 122, a second back plate 123 and a second cabinet door 124, and a second bottom plate 121 cooperating with the slot 106 is arranged in the lower end of the second frame 117, and four support leg assemblies 112 are arranged at the lower end of the first frame 102.

[0067] In a further embodiment, Figure 1 , 2 As shown in , 19 and 20, a ground copper bar assembly 600 and an intelligent collector 401 electrically connected to the second current transformer 311 in the load branch assembly 300 are arranged at the bottom of the first frame 102, the ground copper bar assembly 600 includes a third copper bar 601, the left end of which is installed with two second connecting plates 604 through connecting bolts 402, the second connecting plates 604 are fixed in the first frame 102 through connecting bolts 402, the right end of the third copper bar 601 is slidably sleeved with a fourth copper bar 602, the right end of the fourth copper bar 602 is installed with two second connecting plates 604 through connecting bolts 402, the second connecting plates 604 are connected to the second frame 117 through connecting bolts 402, and the threaded holes on the fourth copper bar 602 are provided with second locking screws 603 matching the third copper bar 601.

[0068] In a further embodiment, Fig.17 As shown, the support leg assembly 112 includes a sleeve 113, which is arranged at the lower end of the first frame 102 or the second frame 117. The sleeve 113 is internally threadedly connected with a first screw rod 114, and a foot pad 115 is arranged at the lower end of the first screw rod 114.

[0069] In a further embodiment, Fig.11 , 12 As shown in Figures 14, 16 and 21, a sealing strip 125 cooperating with the first top plate 107 is provided on the inner side of the second top plate 120, a sealing strip 125 cooperating with the first back plate 110 is provided on the inner side of the second back plate 123, a sealing strip 125 cooperating with the first back plate 110 is provided on the inner side of the second bottom plate 121, a sealing strip 125 cooperating with the first bottom plate 108 is provided on the inner side of the second cabinet door 124, a sealing strip 125 cooperating with the first cabinet door 111 is provided on the inner side of the second cabinet door 124, and the second top plate 120, the second back plate 123 and the second cabinet door 124 can all be installed with an extension plate 126 by connecting bolts 402, and a sealing strip 125 cooperating with the first top plate 107, the first back plate 110 and the first cabinet door 111 is provided on the inner side of the extension plate 126.

[0070] In a further embodiment, Figure 1 , 19 As shown, the main line component 200 includes a main switch 201, a lightning arrester 202, and a first circuit breaker 203 for controlling three main lines 204. The main switch 201, several lightning arresters 202 and several first circuit breakers 203 are installed on a bracket in the first frame 102. Three first current transformers 205 for respectively taking power from the three main lines 204 are installed on the bracket. The ends of the three main lines 204 are respectively electrically connected to three main line copper busbar assemblies 206, and the main line copper busbar assemblies 206 are plugged into and matched with electrical contacts 319.

[0071] In a further embodiment, Figure 3 As shown, the main line copper bar assembly 206 includes a first copper bar 207 electrically connected to the main line 204 and plugged with the electrical contact 319, the left end of the first copper bar 207 is installed with two first connecting plates 208 through a connecting bolt 402, the first connecting plate 208 is fixed in the first frame 102 through the connecting bolt 402, the right end of the first copper bar 207 is slidably sleeved with a second copper bar 209 plugged with the electrical contact 319, the right end of the second copper bar 209 is installed with two first connecting plates 208 through a connecting bolt 402, the first connecting plate 208 is connected to the second frame 117 through the connecting bolt 402, and the threaded hole on the second copper bar 209 is provided with a first locking screw 210 that cooperates with the first copper bar 207.

[0072] In a further embodiment, Figure 5 , 6As shown, the fixing assembly 307 includes a first clamp block 308 for installing a second current transformer 311 or connecting a second circuit breaker 314 through a trapezoidal seat 313, a second clamp block 310 is hinged on one side end of the first clamp block 308, a fastening bolt 309 is rotatably arranged in a circular hole on the other side of the first clamp block 308, the fastening bolt 309 cooperates with a slot on the same side end of the second clamp block 310, and a nut is threadedly connected on the fastening bolt 309 to enable the first clamp block 308 and the second clamp block 310 to clamp the corresponding slats 301.

[0073] In a further embodiment, Figure 4 , 9 As shown, the bracket assembly 500 includes a first cross bar 501 with a trapezoidal cross section, a second cross bar 502 with a trapezoidal cross section is slidably arranged on the first cross bar 501, a dovetail groove and a dovetail guide bar are matched between the first cross bar 501 and the second cross bar 502, the left end of the first cross bar 501 is fixed to the first frame 102 by a connecting bolt 402, and the right end of the second cross bar 502 is fixed to the second frame 117 by a connecting bolt 402.

[0074] The cabinet 100 of the present invention is a telescopic cabinet 100 composed of an inner cabinet component 101 and an outer cabinet component 116, which can be telescopically deformed at any time according to the actual expansion requirements of the load branch in the cabinet 100, ensuring that the space in the cabinet 100 matches the number of internal load branches and will not appear crowded due to the expansion of the load branch, thereby ensuring that the heat dissipation effect in the cabinet 100 is not affected and electrical faults are not likely to occur in the cabinet 100 due to the good heat dissipation effect. The outer cabinet component 116 constituting a part of the cabinet 100 in the present invention ensures the sealing of the cabinet 100 by installing an extension plate 126 on the outer cabinet component 116 after the cabinet 100 is changed from small to large, so that the outer cabinet component 116 can increase or decrease the extension plate 126 according to the actual contraction or expansion requirements of the cabinet 100, reducing the cost of the cabinet 100 in the use process of a small-capacity space. In the present invention, the inner cabinet assembly 101 and the outer cabinet assembly 116 of the cabinet 100 can always maintain panel contact between the two without a large gap during the process of telescopic deformation, have good sealing, and make the cabinet 100 look more beautiful. The load branch assembly 300 in the present invention is a modular design that integrates the second current transformer 311 and the second circuit breaker 314 and is plug-in-matched with the main line copper busbar assembly 206, so there is no need to install the second current transformer 311 and the second circuit breaker 314 in the cabinet 100 and connect the two. While ensuring that the neat arrangement of the load branch assembly 300 will not cause short circuits and electric shocks, it will not touch the components in the adjacent load branch assembly 300, and the operation of load branch expansion is convenient and efficient. The load branch assembly 300 in the present invention can be equipped with different types of second circuit breakers 314 or second current transformers 311 as needed. The cabinet 100 in the present invention can allow the load branch assemblies 300 equipped with different types of second circuit breakers 314 or second current transformers 311 to be neatly arranged and installed, while ensuring that the second current transformers 311 or second circuit breakers 314 in adjacent load branch assemblies 300 will not interfere with each other due to different configurations.

[0075] The expansion and contraction process of the cabinet 100 in the present invention is as follows:

[0076] like Fig.19As shown, first loosen the first locking screw 210 on the main copper bar assembly 206 and the second locking screw 603 in the ground copper bar assembly 600, then rotate the foot pads 115 in the two foot assemblies 112 at the bottom of the outer cabinet assembly 116 off the ground, and push or pull the outer cabinet assembly 116 to shrink or extend relative to the inner cabinet assembly 101. During the expansion and contraction process of the outer cabinet assembly 116 relative to the inner cabinet assembly 101, the two second guide rods 118 and the two sliding sleeves 119 of the outer cabinet assembly 116 slide in the corresponding guide grooves 104 and the first guide grooves 119 on the inner cabinet assembly 101, respectively. On the guide rod 105, the second frame 117 in the outer cabinet assembly 116 drives the second copper bar 209 in the main copper bar assembly 206 and the fourth copper bar 602 in the ground copper bar assembly 600 to extend and retract relative to the first copper bar 207 and the third copper bar 601 respectively. The second cross bar 502 in the bracket assembly 500 is extended and retracted relative to the first cross bar 501 under the drive of the second frame 117. After the expansion and contraction of the cabinet body 100 meets the requirements, tighten the first locking screw 210 and the second locking screw 603 to lock the main copper bar assembly 206 and the ground copper bar assembly 600.

[0077] After the outer cabinet assembly 116 of the cabinet body 100 is extended relative to the inner cabinet assembly 101, the extension plate 126 is connected to the second cabinet door 124, the second top plate 120 and the second back plate 123 respectively by connecting bolts 402 to ensure that the cabinet body 100 with the space expansion completed is in a sealed state when the first cabinet door 111 and the second cabinet door 124 are closed.

[0078] When the second crossbar 502 in the two bracket assemblies 500 is extended relative to the first crossbar 501 , the load branch assembly 300 mounted on the second crossbar 502 moves synchronously with the second crossbar 502 .

[0079] After the cabinet body 100 is completely extended and retracted, the two foot pads 115 of the two support leg assemblies 112 at the bottom of the outer cabinet assembly 116 are rotated downward again and abutted against the ground to form a support.

[0080] After the space expansion of the cabinet 100 is completed, the load branch circuit assembly 300 can be installed on the bracket assembly 500 in the cabinet 100 .

[0081] The installation process of the load branch assembly 300 in the present invention is as follows:

[0082] The switch of the second circuit breaker 314 in the load branch assembly 300 is in the open state, and the two shift blocks 304 are located at the top limit position of the corresponding first slide groove 302 under the action of the corresponding reset spring 306. The reset spring 306 is in a stretched state, and the pull rope 315 is in a taut state. The size of the trapezoidal slot formed between the second clamping block 305 and the corresponding first clamping block 303 is equal to the cross-sectional size of the first cross bar 501 or the second cross bar 502 in the bracket assembly 500.

[0083] The switch of the second circuit breaker 314 in the load branch assembly 300 is turned off, and the pull rope 315 is in a relaxed state. Then, the two shift blocks 304 are shifted down so that the distance between the second clamping blocks 305 on the two shifting blocks 304 and the corresponding first clamping blocks 303 is greater than the cross-sectional size of the first cross bar 501 or the second cross bar 502 in the bracket assembly 500, and the slats 301 of the load branch assembly 300 are closely attached to the first cross bar 501 or the second cross bar 502 on the two bracket assemblies 500, so that the first cross bar 501 or the second cross bar 502 is located between the first clamping block 303 and the corresponding second clamping block. 305, and then the force on the shift block 304 is removed. The second clamping block 305 on the two shifting blocks 304 clamps the first cross bar 501 or the second cross bar 502 with the corresponding first clamping block 303 under the action of the reset spring 306, ensuring that the first cross bar 501 or the second cross bar 502 will not be separated from the trapezoidal slot formed by the first clamping block 303 and the second clamping block 305, thereby completing the installation and fixation of the load branch assembly 300 on the bracket assembly 500 in the cabinet 100. Finally, the switch of the second circuit breaker 314 is turned on, and the switch of the second circuit breaker 314 drives the pull rope 315 to be tightened.

[0084] During the process of installing the load branch assembly 300 on the bracket assembly 500, the locking nut 321 is loosened to move the slide 318, and the slide 318 drives the electrical contact 319 to be plugged and connected with the corresponding first copper bar 207 or second copper bar 209 in the main line copper bar assembly 206, and then the locking nut 321 is tightened to fix the position of the slide 318, so that the electrical contacts 319 in adjacent load branch assemblies 300 installed on the bracket assembly 500 are respectively located on the first copper bar 207 or second copper bar 209 of two adjacent main line copper bar assemblies 206, and the second current transformers 311 in adjacent load branch assemblies 300 are staggered up and down to improve the arrangement density of the load branch assembly 300 in the cabinet 100.

[0085] like Fig. 20 As shown, if the second circuit breakers 314 in the load branch assembly 300 are of different models, the second circuit breakers 314 of equal width are arranged on the slats 301 of the load branch assembly 300 in a side-by-side state, and some second circuit breakers 314 with larger width are vertically staggered with other second circuit breakers 314 so as not to be on the slats 301 of the load branch assembly 300, so as to save the installation space of the load branch assembly 300 in the cabinet 100 and avoid interference between the second circuit breakers 314 with larger width and other second circuit breakers 314.

[0086] The vertical movement process of the second current transformer 311 and the second circuit breaker 314 in the load branch assembly 300 is as follows:

[0087] Loosen the nuts of the fixing assembly 307 on the second current transformer 311 and the second circuit breaker 314 so that the second clamp 310 and the first clamp 308 in the fixing assembly 307 release the clamping of the slat 301. Move the fixing assembly 307 in the vertical direction as needed. The fixing assembly 307 drives the second current transformer 311 and the second circuit breaker 314 to move synchronously the same distance. After the second current transformer 311 and the second circuit breaker 314 reach the desired positions on the slat 301, tighten the nuts in the fixing assembly 307 so that the second clamp 310 and the first clamp 308 of the fixing assembly 307 are re-clamped and fixed on the slat 301.

[0088] The process of installing different types of second circuit breakers 314 on the load branch assembly 300 is as follows:

[0089] After the second circuit breaker 314 is installed on the slat 301, the switch of the second circuit breaker 314 is turned on, and a pull rope 315 of a suitable length is connected between the second circuit breaker 314 and the lower shift block 304, so that when the pull rope 315 is tightened, the switch of the second circuit breaker 314 is in the open state, and the lower shift block 304 is in the top limit position of the first slide slot 302.

[0090] After the second circuit breaker 314 is installed, the branch line 312 is inserted into the socket 323 of the clamp 322 in the load branch assembly 300, and the third screw 324 is driven by rotating the twist wheel 325 to tighten and fix the branch line 312 in the socket 323, and the branch line 312 passes through the corresponding second current transformer 311 and is connected to the second circuit breaker 314.

[0091] In the present invention, the opening order of the first cabinet door 111 and the second cabinet door 124 is to open the second cabinet door 124 first and then open the first cabinet door 111 .

Claims

1. An easily expandable cabinet for managing electric energy, characterized in that: include: A cabinet body, the cabinet body is composed of an inner cabinet component and an outer cabinet component that are telescopically changeable with each other; Main circuit components are used to control and protect the three main circuits connected to the cabinet; A load branch circuit component is used to expand and control the branch circuit at the end of the branch circuit in the cabinet, and the load branch circuit component includes a vertical slat, which is installed in the cabinet through two bracket assemblies, and the slat is provided with two first slide grooves corresponding to the bracket assemblies one by one, and a shift block is vertically slid in the first slide groove, and the shift block is connected to the fixed plate on the slat through a return spring, and a second clamping block is arranged on the shift block, and two first clamping blocks corresponding to the second clamping blocks are arranged on the slat, and the first clamping block and the corresponding second clamping block form a trapezoidal clamping groove matched with the corresponding bracket assembly, and a slide seat is slidably arranged on the upper end guide seat of the slat, A second screw and an electric contact electrically connected to the main circuit are welded to the lower end and the upper end of the slide seat respectively; the second screw moves in the second slide groove on the guide seat; a locking nut is arranged on the second screw; a clamp is welded to the lower end of the second screw; a branch line is installed in the socket on the clamp; a third screw for pressing the branch line in the socket is arranged in the threaded hole on the clamp; a torsion wheel is arranged at the lower end of the third screw; a second current transformer for inductively drawing power from the branch line and a second circuit breaker for controlling the branch line are installed on the slats through a fixing assembly; the switch of the second circuit breaker is tightly connected to the dial block below it through a pull rope.

2. The easily expandable display cabinet according to claim 1, characterized in that: The inner cabinet assembly includes a first frame, two guide grooves are provided on the front and rear sides of the upper end of the first frame, two first guide rods are provided on the front and rear sides of the lower end of the first frame, the top, bottom, left side, rear side and front side of the first frame are respectively provided with a first top plate, a first bottom plate, a first side plate, a first back plate and a first cabinet door, a slot is provided on the right side of the lower end of the first frame, and four support leg assemblies are provided at the lower end of the first frame.

3. The easily expandable display cabinet according to claim 2, characterized in that: The outer cabinet assembly includes a second frame, two second guide rods corresponding to the guide grooves are arranged on the front and rear sides of the upper end of the second frame, two sliding sleeves corresponding to the first guide rods are arranged on the front and rear sides of the lower end of the second frame, the top, right side, rear side and front side of the first frame are respectively provided with a second top plate, a second side plate, a second back plate and a second cabinet door, a second bottom plate matching the slot is arranged in the lower end of the second frame, and four support leg assemblies are arranged at the lower end of the first frame.

4. The easily expandable display cabinet according to claim 3, characterized in that: A ground copper bar assembly and an intelligent collector electrically connected to the second current transformer in the load branch assembly are arranged at the bottom of the first frame. The ground copper bar assembly includes a third copper bar whose left end is installed with two second connecting plates through connecting bolts, and the second connecting plates are fixed in the first frame through connecting bolts. A fourth copper bar is slidably mounted on the right end of the third copper bar, and two second connecting plates are installed on the right end of the fourth copper bar through connecting bolts. The second connecting plate is connected to the second frame through connecting bolts, and a second locking screw matching the third copper bar is arranged in a threaded hole on the fourth copper bar.

5. The easily expandable display cabinet according to claim 2 or 3, characterized in that: The support leg assembly comprises a sleeve, which is arranged at the lower end of the first frame or the second frame. The inner thread of the sleeve is connected with a first screw rod, and the lower end of the first screw rod is provided with a foot pad.

6. The easily expandable display cabinet according to claim 3, characterized in that: A sealing strip that cooperates with the first top plate is provided on the inner side of the second top plate, a sealing strip that cooperates with the first back plate is provided on the inner side of the second back plate, a sealing strip that cooperates with the first bottom plate is provided on the inner side of the second bottom plate, and a sealing strip that cooperates with the first door is provided on the inner side of the second cabinet door. The second top plate, the second back plate and the second cabinet door can all be installed with an extension plate by connecting bolts, and a sealing strip that cooperates with the first top plate, the first back plate and the first cabinet door is provided on the inner side of the extension plate.

7. The easily expandable display cabinet according to claim 2, characterized in that: The main line assembly includes a main switch, a lightning arrester, and a first circuit breaker for controlling three main lines. The main switch, several lightning arresters and several first circuit breakers are installed on a bracket in a first frame. Three first current transformers for respectively inducing power from the three main lines are installed on the bracket. The ends of the three main lines are electrically connected to three main line copper busbar assemblies respectively, and the main line copper busbar assemblies are plugged into and matched with electrical contacts.

8. The easily expandable display cabinet according to claim 7, characterized in that: The main line copper bar assembly includes a first copper bar electrically connected to the main line and plugged with the electrical contact, the left end of the first copper bar is installed with two first connecting plates through connecting bolts, the first connecting plate is fixed in the first frame through connecting bolts, the right end of the first copper bar is slidably sleeved with a second copper bar plugged with the electrical contact, the right end of the second copper bar is installed with two first connecting plates through connecting bolts, the first connecting plate is connected to the second frame through connecting bolts, and the threaded hole on the second copper bar is provided with a first locking screw that matches the first copper bar.

9. The easily expandable display cabinet according to claim 1, characterized in that: The fixing assembly includes a first clamp block for installing a second current transformer or connecting a second circuit breaker through a trapezoidal seat, a second clamp block is hingedly connected to one side end of the first clamp block, a fastening bolt is rotatably arranged in a circular hole on the other side of the first clamp block, the fastening bolt cooperates with a slot on the same side end of the second clamp block, and a nut is threadedly connected on the fastening bolt to enable the first clamp block and the second clamp block to clamp the corresponding strips.

10. The easily expandable display cabinet according to claim 1, characterized in that: The bracket assembly includes a first cross bar with a trapezoidal cross section, a second cross bar with a trapezoidal cross section is slidably arranged on the first cross bar, a dovetail groove and a dovetail guide bar are matched between the first cross bar and the second cross bar, the left end of the first cross bar is fixed to the first frame by a connecting bolt, and the right end of the second cross bar is fixed to the second frame by a connecting bolt.

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