A split-type low-voltage switchgear

Abstract

This utility model relates to a split-type low-voltage switchgear, comprising: a lower cabinet; at least one middle cabinet, wherein when there is one middle cabinet, the bottom of the middle cabinet is detachably mounted on top of the lower cabinet; when there are multiple middle cabinets, the middle cabinets are stacked vertically, with the bottom of the upper middle cabinet detachably mounted on top of the lower middle cabinet, and the bottom of the bottom middle cabinet detachably mounted on top of the lower cabinet; and an upper cabinet, wherein when there is one middle cabinet, the bottom of the upper cabinet is detachably mounted on top of the middle cabinet; and when there are multiple middle cabinets, the upper cabinet is detachably mounted on top of the top middle cabinet. This utility model assembles multiple cabinets into a low-voltage switchgear, effectively reducing the impact of space constraints on component installation, wiring, and debugging. Furthermore, the detachable assembly of these cabinets avoids the problem of difficulty in positioning the low-voltage switchgear due to excessive depth.

Description

Technical Field

[0001] This utility model relates to the technical field of low-voltage cabinet structure, specifically to a split low-voltage cabinet. Background Technology

[0002] In a prefabricated substation, the low-voltage switchgear, also known as a low-voltage distribution cabinet, converts the high-voltage electrical energy of the prefabricated substation into low-voltage electrical energy with the auxiliary transformer inside. This power supply enables the control components within the low-voltage switchgear to monitor and control the entire prefabricated substation system and transmit data with the power distribution system.

[0003] However, in prefabricated substations, the low-voltage switchgear needs to be placed in a designated location within the prefabricated substation. The internal space of the prefabricated substation is often limited, and the space left for the low-voltage switchgear can vary greatly.

[0004] When the installation space of an existing integrated low-voltage switchgear is very deep, it can lead to difficulties in positioning during the installation process. After the entire switchgear is installed, the difficulty of installing and wiring the components inside increases. Although some components inside the integrated low-voltage switchgear can be installed and debugged externally before being placed in the prefabricated substation, the same problems of difficulty in positioning the integrated low-voltage switchgear and difficulty in installing and wiring components externally still exist. Utility Model Content

[0005] To address the aforementioned technical problems, the purpose of this utility model is to provide a split low-voltage switchgear, which divides the low-voltage switchgear into multiple cabinets that can be disassembled and assembled. This allows for the installation, debugging, and wiring of components within each cabinet from the outside, effectively reducing the impact of space limitations on component installation, wiring, and debugging. Furthermore, the cabinets can be assembled together afterward, avoiding the problem of the low-voltage switchgear being difficult to position due to excessive depth.

[0006] To solve the above-mentioned technical problems, the present invention proposes the following technical solution: This application relates to a split-type low-voltage switchgear, comprising: Lower cabinet; At least one middle cabinet, when there is one middle cabinet, the bottom of the middle cabinet can be detachably installed on top of the lower cabinet, when there are multiple middle cabinets, the multiple middle cabinets are stacked on top of each other, the bottom of the upper middle cabinet can be detachably installed on top of the lower middle cabinet, and the bottom of the lowest middle cabinet can be detachably installed on top of the lower cabinet; When there is one middle cabinet, the bottom of the upper cabinet can be detached and installed on top of the middle cabinet. When there are multiple middle cabinets, the upper cabinet can be detached and installed on top of the uppermost middle cabinet.

[0007] In some embodiments of this application, the bottom of the middle cabinet is slidably fitted with the top of the lower cabinet and can be detachably installed above the lower cabinet; When there are multiple middle cabinets, the bottom of the upper middle cabinet slides and the top of the lower middle cabinet can be detachably installed on the top of the lower middle cabinet, the bottom of the lowest middle cabinet slides and the top of the lower cabinet can be detachably installed on the top of the lower cabinet, and the bottom of the upper cabinet slides and the top of the uppermost middle cabinet can be detachably installed on the top of the uppermost middle cabinet. When there is a middle cabinet, the bottom of the upper cabinet slides with the top of the middle cabinet and can be detachably installed on top of the middle cabinet.

[0008] In some embodiments of this application, the lower cabinet includes a first frame, the first frame comprising: Four pillars surround a square space; Two opposing first horizontal beams and two opposing first vertical beams, both of which can be detachably installed onto the upper end of the corresponding column; Two sliding grooves are provided. One sliding groove can be detachably installed above a first longitudinal beam and the corresponding column connecting the first longitudinal beam. The other sliding groove can be detachably installed above another first longitudinal beam and the corresponding column connecting the other first longitudinal beam.

[0009] In some embodiments of this application, the four columns are installed on profiles pre-arranged on the base of the prefabricated substation, and the square space is used to place an auxiliary transformer for outputting low-voltage electricity.

[0010] In some embodiments of this application, the central cabinet includes a second frame and a first support unit, the structure of the second frame being identical to that of the first frame, and the first support unit comprising: Two opposing first support crossbeams and two opposing first support longitudinal beams, both of which can be detachably installed to the lower end of the corresponding column in the second frame. The first support crossbeams are vertically opposite to the first crossbeams in the second frame, and the first support longitudinal beams are vertically opposite to the first longitudinal beams in the second frame. Two sliders are provided. One slider is detachably installed to the lower end of a first support longitudinal beam and the corresponding column connected to the first support longitudinal beam, and is vertically aligned with and slidably engaged with a sliding groove in the lower cabinet. The other slider is detachably installed to the lower end of another first support longitudinal beam and the corresponding column connected to the other first support longitudinal beam, and is vertically aligned with and slidably engaged with another sliding groove in the lower cabinet. The support plate is detachably installed at the lower end of the two first support longitudinal beams and columns.

[0011] In some embodiments of this application, the upper cabinet includes: Four pillars stand upright, enclosing a square space; Two opposing first upper crossbeams and two opposing first upper longitudinal beams, both of which can be detached and installed onto the upper end of the corresponding upper column; The second support unit has the same structure as the first support unit. In the second support unit, both the first support crossbeam and the first support longitudinal beam can be detachably installed to the bottom of the corresponding upper column. In the second support unit, a slider can be detachably installed to the lower end of one of the first support longitudinal beams and the corresponding upper column connected to the first support longitudinal beam, and is vertically aligned with and slidably engaged with a sliding groove in the middle cabinet. In the second support unit, another slider can be detachably installed to the lower end of another first support longitudinal beam and the corresponding upper column connected to the other first support longitudinal beam, and is vertically aligned with and slidably engaged with another sliding groove in the middle cabinet. In the second support unit, a support plate can be detachably installed to the lower ends of two first support longitudinal beams and the corresponding upper columns.

[0012] In some embodiments of this application, the two first longitudinal beams are symmetrically arranged, and the first longitudinal beams include: The first L-shaped panel has an L-shaped opening facing the outside of the square space. The first L-shaped panel includes a first side panel I and a second side panel I. The first side panel I is located between the corresponding columns connecting the first longitudinal beam. The second side panel I extends away from the square space from the upper end of the first side panel I. Mounting holes are provided on both the first side panel I and the second side panel I. The first end panel I and the second end panel I are arranged at the two ends of the first L-shaped panel along its length and are provided with end mounting holes. The end mounting holes are bolted to the mounting holes on the corresponding columns that connect to the first longitudinal beam. Two symmetrically arranged slides, and each slide includes: The first Z-shaped panel includes a first panel, a second panel, and a third panel perpendicularly abutting between the first panel and the second panel. The first panel and the second panel extend away from each other toward the opposite surface of the third panel. The corner formed by the second panel and the third panel is adapted to the corner of the first L-shaped panel. The mounting holes on the second panel are directly opposite to the mounting holes on the first side panel I, and the mounting holes on the third panel are directly opposite to the mounting holes on the second side panel I.

[0013] In some embodiments of this application, the groove further includes: The first end panel II and the second end panel II are arranged at the two ends of the first Z-shaped panel along its length direction, and are provided with end mounting holes, which are bolted to the mounting holes on the corresponding columns connecting the first longitudinal beam.

[0014] In some embodiments of this application, the two first support longitudinal beams are symmetrically arranged, and the first support longitudinal beams include: The second L-shaped panel has an L-shaped opening facing the outside of the square space formed by the columns in the second frame. The second L-shaped panel includes a first side panel II and a second side panel II. The first side panel II is located between the corresponding columns connecting the first support beam. The second side panel II extends away from the square space from the lower end of the first side panel II. Mounting holes are provided on both the first side panel II and the second side panel II. The first end panel III and the second end panel III are arranged at the two ends of the second L-shaped panel along its length and are provided with end mounting holes. The end mounting holes are bolted to the mounting holes on the corresponding columns that connect to the first support longitudinal beam. The slider includes a U-shaped panel with its U-shaped opening facing upwards. The U-shaped panel includes a first sliding plate, a first end panel IV, and a second end panel IV. The first end panel IV and the second end panel IV are joined together at both ends of the first sliding plate along the length direction of the first sliding plate. The end mounting holes opened on the first end panel IV and the second end panel IV are bolted to the corresponding column mounting holes connecting the first support longitudinal beam. The first sliding plate is located below the second side panel II. The mounting holes opened on the first sliding plate, the mounting holes on the second side panel II, and the mounting holes on the third panel of the slide groove in the second frame are directly opposite each other. The first support unit has mounting holes on the second side panel II of the first support beam, which is the support plate of the first support unit. The mounting holes on the support side are bolted to the mounting holes on the corresponding column of the first support beam and the mounting holes on the first side panel II.

[0015] Compared with the prior art, the embodiments proposed in this application have the following advantages and beneficial effects: (1) The low-voltage cabinet is divided into a lower cabinet, at least one middle cabinet and an upper cabinet. The middle cabinet can be detachably installed on top of the lower cabinet, and the upper cabinet can be detachably installed on top of the middle cabinet. In this way, the internal components of each cabinet can be installed and wired from the outside. After the installation, debugging and wiring of the internal components of each cabinet are completed, the cabinets are assembled and the remaining wiring between the cabinets is completed. In this way, the influence of space limitations on the installation, wiring and debugging of components is effectively reduced, and this type of assembled low-voltage cabinet can better cope with the situation where the depth is greater than the horizontal dimension of the low-voltage cabinet. (2) Since each cabinet can be assembled separately, the manufacturing flexibility of low-voltage cabinets is improved.

[0016] Other features and advantages of this utility model will become clearer after reading the detailed embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments of this utility model or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a structural diagram of the split low-voltage switchgear proposed in this utility model, which has two middle cabinets; Figure 2 This is a structural diagram of the lower cabinet in the split low-voltage switchgear proposed in this utility model; Figure 3 This is a partial exploded view of the lower cabinet in the split low-voltage switchgear proposed in this utility model; Figure 4 This is a structural diagram of the middle cabinet in the split low-voltage switchgear proposed in this utility model; Figure 5 This is a partial exploded view of the middle cabinet in the split low-voltage switchgear proposed in this utility model; Figure 6 This is a structural diagram of the upper cabinet in the split low-voltage switchgear proposed in this utility model; Figure label: 1000, Low-voltage switchgear; 100, Lower cabinet; 100', First frame; 100'', Second frame; 110, Upright; 120A / 120B, First crossbeam; 130 / 130A, First longitudinal beam; 131, Second side panel I; 132, First side panel I; 133, First end panel I; 140, First slide rail; 140A, Second slide rail; 141, First panel; 142, Third panel; 143, Second panel; 144, First end panel II; 200, Middle cabinet; 210. First support unit; 210', Second support unit; 211A / 211B, First support crossbeam; 212A / 212B, First support longitudinal beam; 212A1, First side panel II; 213A, First slider; 213A1, First sliding plate; 213A2, First end panel IV; 213B, Second slider; 214, Support plate; 2141, Support side; 300, Upper cabinet; 310, Upper column; 320A / 320B, First upper crossbeam; 330A / 330B, First upper longitudinal beam. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model. In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0022] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0023] To avoid the problems of space constraints and difficulties in installing, wiring, and debugging components due to the depth of the space, please refer to... Figure 1 This application proposes a split low-voltage switchgear 1000, which divides the low-voltage switchgear 1000 into multiple assemblable cabinets. In use, the internal components of each cabinet can be installed, wired and debugged independently from the outside, and then assembled together. This realizes the convenience of installing and wiring the components in each cabinet, and the split low-voltage switchgear 1000 can improve the manufacturing flexibility of the low-voltage switchgear 1000.

[0024] See Figure 1The prefabricated low-voltage switchgear 1000 includes a lower cabinet 100, at least one middle cabinet 200 and an upper cabinet 300. The upper cabinet 300, middle cabinet 200 and lower cabinet 100 are stacked on top of each other in sequence. When there are multiple middle cabinets 200, each middle cabinet 200 is also stacked on top of each other.

[0025] In some embodiments of this application, the lower cabinet 100 can be arranged on a fixed base of the prefabricated substation, for example, on a profile pre-arranged on the base of the prefabricated substation.

[0026] Since the lower cabinet 100 is mainly used to house the auxiliary transformer, it can be fixed to the profile by welding during installation to ensure the overall stability of the entire low-voltage cabinet 1000.

[0027] The number of cabinets 200 depends on the number of components (including parts and various terminals) that need to be accommodated.

[0028] If one intermediate cabinet 200 can accommodate all the required components, then one intermediate cabinet 200 is set up, forming a low-voltage cabinet 1000 with one upper cabinet 300, one intermediate cabinet 200, and one lower cabinet 100; if one intermediate cabinet 200 cannot accommodate all the required components, then multiple intermediate cabinets 200 are set up, see [reference]. Figure 1 The low-voltage switchgear 1000 has two intermediate cabinets 200, and each of the multiple intermediate cabinets 200 has the same structure and is stacked on top of each other.

[0029] To facilitate the assembly of the middle cabinet 200 onto the lower cabinet 100, the middle cabinet 200 can be hoisted into place, or lifted to a certain height by a lifting tool and then detachably installed onto the top of the lower cabinet 100, for example, by bolts. In this way, the assembly of the middle cabinet 200 and the lower cabinet 100 is completed.

[0030] In the presence of multiple cabinets 200, each cabinet 200 is assembled into an upper and lower structure in sequence as described above.

[0031] Next, the cabinet 300 is assembled in the same way, and finally the cabinet doors and sealing panels of the low-voltage cabinet 1000 are assembled to complete the entire assembly of the low-voltage cabinet 1000.

[0032] For ease of explanation, we will use a medium-sized cabinet of 200 as an example.

[0033] In some embodiments of this application, for ease of assembly, the bottom of the middle cabinet 200 and the top of the lower cabinet 100 are slidably fitted together and then assembled together, and the top of the middle cabinet 200 and the bottom of the upper cabinet 300 are slidably fitted together and then assembled together.

[0034] For reference: Figures 2 to 6The structure of the lower cabinet 100, the middle cabinet 200, and the upper cabinet 300 will be described in detail.

[0035] In some embodiments of this application, see Figure 2 and Figure 3 The lower cabinet 100 includes a first frame 100', which forms the lower cabinet 100.

[0036] The first frame 100' includes four columns 110, two opposing first crossbeams 120A / 120B, two opposing first longitudinal beams 130 / 130A, and two slides (denoted as first slide 140 and second slide 140A).

[0037] See Figure 2 Four columns 110 surround a square space. In some embodiments of this application, the four columns 110 are welded to pre-arranged profiles on a box-type substation base (not shown) according to pre-designed dimensions.

[0038] After the auxiliary transformer is in place, the two first crossbeams 120A / 120B and the two first longitudinal beams 130 / 130A can be installed to the upper end of the column 110 by means of bolts, for example. The two are combined to ensure that the low-voltage switchgear 1000 has a stable bottom cabinet foundation.

[0039] To facilitate subsequent assembly, the four columns 110 have mounting holes (unmarked) on their sides facing the corresponding first crossbeams 120A / 120B and first longitudinal beams 130 / 130A.

[0040] To facilitate the assembly of the lower cabinet 100 and the middle cabinet 200, two slides are installed above the two first longitudinal beams 130 / 130A, that is, the first slide 140 is installed above the first longitudinal beam 130, and the second slide 140A is installed above the first longitudinal beam 130A.

[0041] In some embodiments of this application, in order to make the slide rails fixed and stable, the first slide rail 140 is detachably installed above a first longitudinal beam 130 and the corresponding column 110 connecting the first longitudinal beam 130, and the second slide rail 140A is detachably installed above another first longitudinal beam 130A and the corresponding column 110 connecting the first longitudinal beam 130A, so that the slide rail is not only connected to the first longitudinal beam 130 / 130A, but also connected to the corresponding column 110 connecting the first longitudinal beam 130 / 130A, ensuring the overall assembly strength of the lower cabinet 100.

[0042] In some embodiments of this application, to facilitate the assembly of the lower cabinet 100 and the middle cabinet 200, the lower cabinet 100 needs to have pre-drilled mounting holes for assembly with the middle cabinet 200. Therefore, see... Figure 2The structure of a first longitudinal beam 130 and a first slide 140 is described in detail. The first longitudinal beam 130 and another first longitudinal beam 130A are arranged symmetrically, and the first slide 140 and the second slide 140A are arranged symmetrically.

[0043] See below. Figure 3 The structure of one of the first longitudinal beams 130 and the first slide 140 will be used as an example for explanation.

[0044] In some embodiments of this application, the first longitudinal beam 130 includes a first L-shaped panel and a first end panel I and a second end panel I located at the ends of the first L-shaped panel along its length direction.

[0045] The first L-shaped panel includes a first side panel I 132 and a second side panel I 131 connected in an L-shape.

[0046] See Figure 2 The L-shaped opening of the first L-shaped panel faces the outside of the square space enclosed by the four columns 110, so that the first side panel I 132 is located between the corresponding columns 110 connecting the first longitudinal beam 130, and the second side panel I 131 extends away from the square space by connecting the upper end of the first side panel I 132.

[0047] In some embodiments of this application, the first end panel I 133 and the second end panel I (not shown) are respectively provided with end mounting holes, which are respectively installed on the corresponding columns 110 connecting the first longitudinal beam 130; and the first side panel I 132 and the second side panel I 131 are also respectively provided with mounting holes (not marked), the mounting holes on the first side panel I 132 are used to connect with the first slide groove 140, and the mounting holes on the second side panel I 131 are used to reserve the cabinet 200 during assembly.

[0048] In some embodiments of this application, see Figure 3 The first slide 140 includes a first Z-shaped panel, which includes a first panel 141, a second panel 143 and a third panel 142 in a Z-shape. The first panel 141 extends perpendicularly to one end of the third panel 142 and away from a surface of the third panel 142. The second panel 143 extends perpendicularly to the other end of the third panel 142 and away from another surface of the third panel 142 opposite to that surface.

[0049] The L-shaped corner formed by the third panel 142 and the second panel 143 is adapted to the corner of the first L-shaped panel of the first longitudinal beam 130. Mounting holes are provided on both the third panel 142 and the second panel 143. The mounting holes on the second panel 143 are directly opposite to the mounting holes on the first side panel I 132 of the first L-shaped panel, and the mounting holes on the third panel 142 are directly opposite to the mounting holes on the second side panel I 131 of the first L-shaped panel. Thus, when the first slide 140 is placed above the first L-shaped panel, the bolt passes through the mounting holes on the second panel 143 and the mounting holes on the first side panel I 132 of the first L-shaped panel to install the first slide 140 onto the first longitudinal beam 130.

[0050] The mounting holes on the third panel 142 and the mounting holes on the second side panel I 131 of the first longitudinal beam 13 are reserved for assembling the cabinet 200.

[0051] In some embodiments of this application, in order to improve the assembly stability of the first slide groove 140, see still... Figure 3 The first slide 140 also includes a first end panel II 144 and a second end panel II (not shown) located at the ends of the first Z-shaped panel along its length direction. The first end panel II 144 and the second end panel II are respectively provided with end mounting holes and are respectively installed on the corresponding columns 110 that connect the first longitudinal beam 130.

[0052] In some embodiments of this application, see Figure 4 and Figure 5 The cabinet 200 includes a second frame 100'' and a first support unit 210.

[0053] The structure of the second frame 100'' is exactly the same as the structure of the first frame 100' as described above, and will not be repeated here.

[0054] See Figure 5 The first support unit 210 includes two opposing first support crossbeams 211A / 211B, two opposing first support longitudinal beams 212A / 212B, two sliders (denoted as first slider 213A and second slider 213B) and a support plate 214.

[0055] The two first support crossbeams 211A / 211B and the two first support longitudinal beams 212A / 212B can be installed to the lower end of the middle column of the second frame 100'' by means of bolts, thereby improving the overall strength of the middle cabinet 200.

[0056] The first slider 213A can be detachably installed below a first support longitudinal beam 212A and the corresponding column connected to the first support longitudinal beam 212A, and the second slider 213B can be detachably installed below another first support longitudinal beam 212B and the corresponding column connected to the first support longitudinal beam 212B. The support plate 214 can be detachably installed at the lower end of the four columns in the two first support longitudinal beams 212A / 212B and the second frame 100'', which facilitates the improvement of the support strength of the entire support plate 214. The purpose of setting the support plate 214 is to separate the lower cabinet 100 and the middle cabinet 200. At the same time, it also provides a fixing plane for some components and wiring terminals in the middle cabinet 200.

[0057] In some embodiments of this application, the structure of the first supporting longitudinal beam 212A / 212B is the same as that of the first longitudinal beam 130 / 130A as described above, and the structure of the first supporting transverse beam 211A / 211B is the same as that of the first transverse beam 120A / 120B as described above.

[0058] In order to achieve the assembly of the middle cabinet 200 and the lower cabinet 100, a first supporting longitudinal beam 212A and a first longitudinal beam in a second frame 100'' are arranged symmetrically from top to bottom, and another first supporting longitudinal beam 212B and another first longitudinal beam in a second frame 100'' are arranged symmetrically from top to bottom.

[0059] The following description uses the structure of the first supporting longitudinal beam 212A and the first slider 213A as an example.

[0060] As described above, the first longitudinal beam 130 and the first supporting longitudinal beam 212A in the second frame 100'' are arranged symmetrically vertically. That is, the first supporting longitudinal beam 212A is also an L-shaped panel and its structure is the same as that of the first longitudinal beam 130 in the second frame 100''. The L-shaped panel of the first supporting longitudinal beam 212A is referred to as the second L-shaped panel, which includes a first side panel II 212A1, a second side panel II (not shown), a first end panel III (not shown), and a second end panel III (not shown) that are connected in an L-shape. Mounting holes are provided on both the first side panel II 212A1 and the second side panel II.

[0061] The first end panel III and the second end panel III are arranged at the two ends of the second L-shaped panel along its length direction, and are provided with end mounting holes. The end mounting holes are bolted to the mounting holes on the corresponding columns of the second frame 100'' that connects to the first support longitudinal beam 212A.

[0062] Since the first longitudinal beam 130 and the first supporting longitudinal beam 212A are arranged symmetrically in the second frame 100'', the first side panel II 212A1 is located between the corresponding columns connecting the first supporting longitudinal beam 212A, and the second side panel II extends away from the square space from the lower end of the first side panel II 212A1.

[0063] Mounting holes are provided on the first side panel II 212A1 of the first support longitudinal beam 212A, and are bolted to the mounting holes on the support side 2141 of the support plate 214. The mounting holes on the support side 2141 are also bolted to the mounting holes on the corresponding columns of the first support longitudinal beam 212A, thereby enabling the installation of the support plate 214.

[0064] Mounting holes are provided on the second side panel II of the first support longitudinal beam 212A to reserve space for assembling the first slider 213A and the lower cabinet 100.

[0065] In some embodiments of this application, see Figure 5 The first slider 213A is U-shaped with the U-shaped opening facing upwards, and the U-shaped panel includes a first slide plate 213A1, a first end panel IV 213A2 and a second end panel IV (not shown). The first end panel IV 213A2 and the second end panel IV are connected to the two ends of the first slide plate 213A1 along the length direction of the first slide plate 213A1. The end mounting holes opened on the first end panel IV 213A2 and the second end panel IV are bolted to the mounting holes on the corresponding columns that connect to the first support longitudinal beam 212A.

[0066] When installing the first slider 213A, the first slide plate 213A1 of the first slider 213A is located below the second side panel II of the first support longitudinal beam 212A. The first slide plate 213A1 has a mounting hole, which is directly opposite to the mounting hole on the second side panel II and the mounting hole on the third panel 142 of the first slide groove 140 in the second frame 100''.

[0067] Therefore, the mounting holes on the second side panel I 131 of the first longitudinal beam 130 in the first frame 100', the mounting holes on the third panel 142 of the first slide groove 140 in the first frame 100', the mounting holes on the first slide plate 213A1 of the first slider 213A, and the mounting holes on the second side panel II of the first support longitudinal beam 212A are aligned sequentially from bottom to top. Thus, the bolts pass through these mounting holes to realize the assembly of the middle cabinet 200 to the upper cabinet 300.

[0068] Similarly, the installation on the other symmetrical side is also done in the same way, which will not be elaborated here.

[0069] After the middle cabinet 200 is assembled, the top of the middle cabinet 200 has the same structure as the upper cabinet 300. Therefore, the bottom structure of the lower cabinet 100 is also designed to be the same as the bottom structure of the middle cabinet 200.

[0070] As described above, a first support unit 210 is provided at the bottom of the cabinet 200; therefore, see... Figure 3 The upper cabinet 300 is also provided with a support unit, referred to as the second support unit 210'. The structure of the second support unit 210' is the same as that of the first support unit 210, and will not be described in detail here.

[0071] In some embodiments of this application, the upper cabinet 300 includes four upper columns 110, two opposing first upper crossbeams 320A / 320B, two opposing first upper longitudinal beams 330A / 330B, and a second support unit 210'.

[0072] See Figure 6 The four upper columns 310 surround a square space. The connection relationship between the four upper columns 310 and the second support unit 210' is the same as the connection relationship between the first support unit 210 and the four columns in the second frame 100'' described in the middle cabinet 200, and will not be repeated here.

[0073] The two first upper crossbeams 320A / 320B and the two first upper longitudinal beams 330A / 330B can be installed to the upper end of the upper column 310 by means of bolts, for example. The first upper longitudinal beams 330A / 330B have the same structure as the first longitudinal beams 130 / 130A as described above and are provided with mounting holes for the installation of the top sealing plate (not shown).

[0074] Using the mounting holes on the second side panel 131 of the first longitudinal beam 130 / 130A of the second frame 100'', the mounting holes on the third panel 142 of the first slide groove 140, the mounting holes on the first slider 213A in the second support unit 210', and the mounting holes on the first support longitudinal beam 212A in the second support unit 210', bolts are sequentially passed through the above mounting holes to assemble the upper cabinet 300 onto the middle cabinet 200.

[0075] At this point, the upper cabinet 300, middle cabinet 200, and lower cabinet 100 are assembled. After that, the cabinet doors and sealing panels can be installed on the assembled low-voltage cabinet 1000.

[0076] The assembly process of the split low-voltage switchgear 1000 described above is as follows: (1) First, weld the four columns 110 in the lower cabinet 100 to the profiles arranged in advance on the base of the box-type substation according to the pre-designed dimensions. Then, use bolts to install two first crossbeams 120A / 120B and two first longitudinal beams 130 / 130A on these four columns 110. Similarly, use bolts to install two slides above the two first longitudinal beams 130 / 130A, and reserve mounting holes for the cabinet 200 during assembly.

[0077] (2) The middle cabinet 200 can be assembled externally according to the assembly method described above. Then, the mounting beams required for component installation can be installed. At this point, the components arranged inside the middle cabinet 200 can be installed, wired and debugged.

[0078] After the components in the middle cabinet 200 have been debugged, the middle cabinet 200 can be assembled onto the lower cabinet 100. Then, the remaining connections between the components in the two cabinets are established.

[0079] (3) Similarly, the upper cabinet 300 can be assembled externally in the manner described above. Then, the mounting beams required for component installation can be installed. Thus, the components arranged inside the upper cabinet 300 can be installed, wired, and debugged.

[0080] After the components in the upper cabinet 300 have been debugged, the upper cabinet 300 can be assembled onto the middle cabinet 200. Then, the remaining connections between the components in the two cabinets are established.

[0081] As described above, the split low-voltage cabinet 1000 allows for external installation, wiring, and debugging of components inside the cabinet, effectively reducing the impact of space limitations on component installation, wiring, and debugging. Furthermore, this type of assembled low-voltage cabinet 1000 can better handle situations where the depth is greater than the horizontal dimension of the low-voltage cabinet 1000.

[0082] Since each cabinet can be assembled individually, the manufacturing flexibility of the low-voltage cabinet 1000 is improved, and each middle cabinet 200 and upper cabinet 300 can be prefabricated, which is not limited by the manufacturing schedule of the prefabricated substation.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A split-type low-voltage switchgear, characterized in that, include: Lower cabinet; At least one middle cabinet, when there is one middle cabinet, the bottom of the middle cabinet can be detachably installed on top of the lower cabinet, when there are multiple middle cabinets, the multiple middle cabinets are stacked on top of each other, the bottom of the upper middle cabinet can be detachably installed on top of the lower middle cabinet, and the bottom of the lowest middle cabinet can be detachably installed on top of the lower cabinet; When there is one middle cabinet, the bottom of the upper cabinet can be detached and installed on top of the middle cabinet. When there are multiple middle cabinets, the upper cabinet can be detached and installed on top of the uppermost middle cabinet.

2. The split-type low-voltage switchgear according to claim 1, characterized in that, The bottom of the middle cabinet is slidably fitted to the top of the lower cabinet and can be detachably installed on top of the lower cabinet; When there are multiple middle cabinets, the bottom of the upper middle cabinet slides and the top of the lower middle cabinet can be detachably installed on the top of the lower middle cabinet, the bottom of the lowest middle cabinet slides and the top of the lower cabinet can be detachably installed on the top of the lower cabinet, and the bottom of the upper cabinet slides and the top of the uppermost middle cabinet can be detachably installed on the top of the uppermost middle cabinet. When there is a middle cabinet, the bottom of the upper cabinet slides with the top of the middle cabinet and can be detachably installed on top of the middle cabinet.

3. The split-type low-voltage switchgear according to claim 2, characterized in that, The lower cabinet includes a first frame, the first frame comprising: Four pillars surround a square space; Two opposing first horizontal beams and two opposing first vertical beams, both of which can be detachably installed onto the upper end of the corresponding column; Two sliding grooves are provided. One sliding groove can be detachably installed above a first longitudinal beam and the corresponding column connecting the first longitudinal beam. The other sliding groove can be detachably installed above another first longitudinal beam and the corresponding column connecting the other first longitudinal beam.

4. The split-type low-voltage switchgear according to claim 3, characterized in that, The four columns are installed on the pre-arranged profiles on the base of the box-type substation, and the square space is used to place the auxiliary transformer for outputting low-voltage electricity.

5. The split-type low-voltage switchgear according to claim 3, characterized in that, The central cabinet includes a second frame and a first support unit. The structure of the second frame is exactly the same as that of the first frame, and the first support unit includes: Two opposing first support crossbeams and two opposing first support longitudinal beams, both of which can be detachably installed to the lower end of the corresponding column in the second frame. The first support crossbeams are vertically opposite to the first crossbeams in the second frame, and the first support longitudinal beams are vertically opposite to the first longitudinal beams in the second frame. Two sliders are provided. One slider is detachably installed to the lower end of a first support longitudinal beam and the corresponding column connected to the first support longitudinal beam, and is vertically aligned with and slidably engaged with a sliding groove in the lower cabinet. The other slider is detachably installed to the lower end of another first support longitudinal beam and the corresponding column connected to the other first support longitudinal beam, and is vertically aligned with and slidably engaged with another sliding groove in the lower cabinet. The support plate is detachably installed at the lower end of the two first support longitudinal beams and columns.

6. The split-type low-voltage switchgear according to claim 5, characterized in that, The upper cabinet includes: Four pillars stand upright, enclosing a square space; Two opposing first upper crossbeams and two opposing first upper longitudinal beams, both of which can be detached and installed onto the upper end of the corresponding upper column; The second support unit has the same structure as the first support unit. In the second support unit, both the first support crossbeam and the first support longitudinal beam can be detachably installed to the bottom of the corresponding upper column. In the second support unit, a slider can be detachably installed to the lower end of one of the first support longitudinal beams and the corresponding upper column connected to the first support longitudinal beam, and is vertically aligned with and slidably engaged with a sliding groove in the middle cabinet. In the second support unit, another slider can be detachably installed to the lower end of another first support longitudinal beam and the corresponding upper column connected to the other first support longitudinal beam, and is vertically aligned with and slidably engaged with another sliding groove in the middle cabinet. In the second support unit, a support plate can be detachably installed to the lower ends of two first support longitudinal beams and the corresponding upper columns.

7. The split-type low-voltage switchgear according to claim 3, characterized in that, The two first longitudinal beams are arranged symmetrically, and the first longitudinal beams include: The first L-shaped panel has an L-shaped opening facing the outside of the square space. The first L-shaped panel includes a first side panel I and a second side panel I. The first side panel I is located between the corresponding columns connecting the first longitudinal beam. The second side panel I extends away from the square space from the upper end of the first side panel I. Mounting holes are provided on both the first side panel I and the second side panel I. The first end panel I and the second end panel I are arranged at the two ends of the first L-shaped panel along its length and are provided with end mounting holes. The end mounting holes are bolted to the mounting holes on the corresponding columns that connect to the first longitudinal beam. Two symmetrically arranged slides, and each slide includes: The first Z-shaped panel includes a first panel, a second panel, and a third panel perpendicularly abutting between the first panel and the second panel. The first panel and the second panel extend away from each other toward the opposite surface of the third panel. The corner formed by the second panel and the third panel is adapted to the corner of the first L-shaped panel. The mounting holes on the second panel are directly opposite to the mounting holes on the first side panel I, and the mounting holes on the third panel are directly opposite to the mounting holes on the second side panel I.

8. The split-type low-voltage switchgear according to claim 7, characterized in that, The chute further includes: The first end panel II and the second end panel II are arranged at the two ends of the first Z-shaped panel along its length direction, and are provided with end mounting holes, which are bolted to the mounting holes on the corresponding columns connecting the first longitudinal beam.

9. The split-type low-voltage switchgear according to claim 5 or 6, characterized in that, The two first supporting longitudinal beams are arranged symmetrically, and the first supporting longitudinal beams include: The second L-shaped panel has an L-shaped opening facing the outside of the square space formed by the columns in the second frame. The second L-shaped panel includes a first side panel II and a second side panel II. The first side panel II is located between the corresponding columns connecting the first support beam. The second side panel II extends away from the square space from the lower end of the first side panel II. Mounting holes are provided on both the first side panel II and the second side panel II. The first end panel III and the second end panel III are arranged at the two ends of the second L-shaped panel along its length and are provided with end mounting holes. The end mounting holes are bolted to the mounting holes on the corresponding columns that connect to the first support longitudinal beam. The slider includes a U-shaped panel with its U-shaped opening facing upwards. The U-shaped panel includes a first sliding plate, a first end panel IV, and a second end panel IV. The first end panel IV and the second end panel IV are joined together at both ends of the first sliding plate along the length direction of the first sliding plate. The end mounting holes opened on the first end panel IV and the second end panel IV are bolted to the corresponding column mounting holes connecting the first support longitudinal beam. The first sliding plate is located below the second side panel II. The mounting holes opened on the first sliding plate, the mounting holes on the second side panel II, and the mounting holes on the third panel of the slide groove in the second frame are directly opposite each other. The first support unit has mounting holes on the second side panel II of the first support beam, which is the support plate of the first support unit. The mounting holes on the support side are bolted to the mounting holes on the corresponding column of the first support beam and the mounting holes on the first side panel II.

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