Modularized rapidly-assembled compact box-type substation

Abstract

The invention relates to the field of transformer substations, in particular to a modular quickly-assembled compact box-type transformer substation which comprises a base, a wall unit is mounted on the base, the wall unit comprises corner stand columns and straight-face stand columns, and the corner stand columns and the straight-face stand columns are mounted on the base through mounting angle iron; the side faces of the corner stand columns and the side faces of the straight face stand columns are provided with inserting grooves correspondingly and used for installing the splicing wall plates, and the splicing wall plates comprise plate bodies and tenons or mortises. A top unit is mounted on the wall body unit, the top unit comprises a top plate and a telescopic plate which is in sliding configuration with the top plate, a clamping part is mounted at the bottom of the telescopic plate, and the clamping part comprises a sliding clamping block and a fixed clamping block which are jointly used for clamping a spliced wall plate at the top of the wall body. According to the invention, the problems of difficult transportation, low installation efficiency, high processing cost and the like of the existing box-type substation are solved through the modular design of parts, the installation mode of mortise and tenon connection and the free combination and assembly of the parts.

Description

Technical Field

[0001] The invention relates to the field of transformer substations, and in particular to a modular and fast-assembled compact box-type transformer substation. Background Art

[0002] Box-type substations are suitable for residential areas, commercial centers, airports, factories, mines, enterprises, hospitals, schools and other places, becoming a new type of complete set of power distribution equipment. Box-type substations are widely used in various fields and have become an indispensable important power equipment in today's power engineering construction.

[0003] Traditional box-type substations are welded during the processing process, which makes the top frame, side wall and bottom frame inseparable, causing a lot of inconvenience to the transportation, installation and maintenance of the substation, and directly affecting the personal safety of on-site operators, equipment safety and the stability of product quality.

[0004] In addition, according to actual needs, box-type substations of different sizes and specifications are often required, which also puts higher requirements on the processing and manufacturing of box-type substations, making the traditional welding method of producing and processing box-type substations more costly and less efficient. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a modular and fast-assembled compact box-type substation. The modular design of parts solves the transportation difficulty and transportation cost problems; multiple mortise and tenon joints are used to achieve rapid assembly of the box-type substation, solving the problems of low processing and assembly efficiency; and the size is adjusted by free combination and assembly of parts, solving the processing cost problem caused by multiple specifications. The specific implementation is through the following technical solutions: The present invention discloses a modularized and quickly assembled compact box-type substation, comprising a base, on which a wall unit is installed. The wall unit comprises a corner column and a straight column, and the corner column and the straight column are respectively installed on the base through a plurality of installation angle irons.

[0006] The sides of the corner columns and the straight columns are respectively provided with plug-in grooves, and the two sets of opposite plug-in grooves are used to install spliced ​​wall panels. The spliced ​​wall panels include a rectangular plate body, and a tenon fixed on its side and / or a tenon groove provided on its side. The tenon can be slidably arranged in the tenon groove, and the tenon can also be slidably arranged in the plug-in groove.

[0007] A top unit is installed on the top of the wall unit. The top unit includes a top plate and a telescopic plate. The telescopic plates are slidably installed on both sides of the top plate. The telescopic plates are provided with guide grooves. Guide rods are slidably arranged in the guide grooves. The guide rods are fixed to the top plate.

[0008] A clamping part is installed at the bottom of the telescopic plate, and the clamping part includes a sliding clamping block and a fixed clamping block, which together complete the clamping of the tenon on the side of the spliced ​​wallboard at the top of the wall.

[0009] Preferably, a male head and / or a female head are installed on both side ends of the top plate, and the male head includes a male head, which is fixed to the middle of the top plate, and a first mounting groove is opened on the male head, and a fastening bolt is hinged in the first mounting groove, and the fastening bolt is threadedly connected to the fastening nut.

[0010] The female head includes a female head, which is opened in the middle of the top plate. The male head can be configured in the female head. A second installation groove is opened at the bottom of the female head. The fastening bolt can be configured in the second installation groove. The fastening nut can abut against the bottom of the top plate.

[0011] Preferably, the clamping part also includes a sliding groove and an adjusting bolt. The sliding groove is opened at the bottom of the telescopic plate. A sliding clamp block is slidably configured in the sliding groove. The sliding clamp block is threadedly connected to the adjusting bolt. The adjusting bolt is rotatably installed on the telescopic plate. The fixed clamp block is arranged opposite to the sliding clamp block, and the fixed clamp block is fixed to the telescopic plate.

[0012] Preferably, the spliced ​​wallboard is an axisymmetric structure, and the length of the spliced ​​wallboard is twice the width.

[0013] Preferably, the wall unit also includes a door post, which is installed on the base through the installation angle iron, the plug-in groove is opened on the first side of the door post, and a door panel is hinged on the second side of the door post. The door panel is arranged between the two door posts, and a door handle is fixedly installed on the door panel.

[0014] Preferably, the distance between the two door posts is a positive integer multiple of the length of the long side of the spliced ​​wall panel.

[0015] Preferably, the telescopic plate is threadedly connected to the positioning bolt, and the top of the positioning bolt can abut against the top plate.

[0016] Preferably, the cross-sectional shape of the insertion groove and the mortise groove is the same, the cross-sectional shape matches the cross-sectional shape of the tenon, and the cross-sectional shape is T-shaped or dovetail-shaped.

[0017] Preferably, the corner columns and the straight columns are equal in height, and the height is a positive even multiple of the length of the long side of the spliced ​​wallboard.

[0018] Preferably, the corner column is located at a corner of the wall unit, and its outline shape is L-shaped.

[0019] After adopting the above technical solution, the beneficial effects of the present invention are: 1. The modular assembly structure of the box-type substation reduces the material transportation cost and improves the installation efficiency of the box-type substation.

[0020] 2. Through the combination and quantity of splicing wall panels, it can meet the assembly needs of box-type substations of various sizes, making the assembly of box-type substations more flexible and diverse, able to adapt to a variety of application scenarios, and increasing the universality of the box-type substation.

[0021] 3. By splicing the adjustable top unit and combining the top with the wall for installation, on the one hand, the installation efficiency of the top unit and the whole is improved, and on the other hand, the integrity of the box-type substation is increased, making its structure more stable and having a longer service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A perspective view of a compact box-type substation designed for modular and rapid assembly; Figure 2 for Figure 1 Schematic diagram of partial disassembly; Figure 3 for Figure 2 The structural diagram of some parts in the figure; Figure 4 for Figure 2 Disassembly diagram of some parts in the figure; Figure 5 for Figure 1 An enlarged schematic diagram of some parts in the middle; Figure 6 This is a disassembly diagram of part of the top unit; Figure 7 for Figure 6 An enlarged schematic diagram of the first component; Figure 8 for Figure 6 An enlarged schematic diagram of the second component; Fig. 9 for Figure 7 Front cross-sectional view of the structure; Fig.10 for Fig. 9 A partial enlarged schematic diagram of area A in the middle.

[0024] Description of reference numerals: 101-base, 200-wall unit, 201-corner column, 202-installation angle iron, 203-insertion slot, 204-straight column, 205-joining wallboard, 206-tenon, 207-tenon groove, 208-door column, 209-door panel, 210-door handle; 300-top unit, 301-top plate, 302-telescopic plate, 303-guide groove, 304-guide rod, 305-positioning bolt, 310-male head, 311-male head, 312-first mounting groove, 313-fastening bolt, 314-fastening nut, 320-female head, 321-female head, 322-second mounting groove; 400-clamping part, 401-sliding groove, 402-sliding clamping block, 403-adjusting bolt, 404-fixing clamping block. DETAILED DESCRIPTION

[0025] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are not configured to limit the present invention. For those skilled in the art, the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention.

[0026] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the present invention. In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation, connection" should be understood in a broad sense, for example, it can be a fixed connection, or a detachable connection or an integral connection; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0027] The embodiment of the present invention provides a modular and fast-assembled compact box-type substation. Figures 1 to 4 The modular fast-assembly compact box-type substation includes a base 101 for fixing and installing a wall unit 200. The wall unit 200 includes a corner column 201 and a straight column 204. The inner and outer sides of the bottom of the corner column 201 and the straight column 204 are respectively fixedly installed on the upper surface of the base 101 through a plurality of mounting angle irons 202. The corner column 201 is located at the corner of the wall unit 200, and its outline shape is L-shaped, which is used to connect and transition two perpendicular walls. The straight column 204 is located in the middle of the single-sided wall, which is used to support the wall and improve the strength of the wall.

[0028] Among them, the installation of angle iron 202 can realize the fixed installation of corner column 201, straight column 204 and base 101 through various methods such as bolt tightening, welding, bonding, etc. The specific installation method is selected by the construction personnel according to the on-site conditions, and its specific installation method is not limited here.

[0029] The corner columns 201 have plug-in grooves 203 on both sides of the vertical end faces away from the corner position along their height direction, and the straight columns 204 have plug-in grooves 203 on both sides of the vertical end faces perpendicular to the wall where they are located along their height direction. The two sets of opposite plug-in grooves 203 are used to install spliced ​​wall panels 205.

[0030] The splicing wall panel 205 includes a rectangular plate body, and a tenon 206 fixed on its side or a tenon groove 207 opened on its side. The splicing wall panel 205 is an axisymmetric structure, and the tenon 206 can be slidably configured in the tenon groove 207, thereby realizing the mortise and tenon connection of multiple splicing wall panels 205. The tenon 206 can also be slidably configured in the plug-in groove 203, thereby realizing the sequential installation of multiple splicing wall panels 205 by two relative plug-in grooves 203.

[0031] Among them, the thickness of the spliced ​​wall panel 205 remains consistent, and the length is twice the width. This structure facilitates the horizontal or vertical installation and matching of the spliced ​​wall panel 205, that is, the long side of the spliced ​​wall panel 205 can be spliced ​​with another long side, or with the short sides of two other spliced ​​wall panels 205, thereby achieving installation diversity and stability.

[0032] Among them, since the spliced ​​wall panel 205 is an axially symmetrical structure, and the side of the spliced ​​wall panel 205 is fixed with a tenon 206 or a tenon groove 207 is opened, the final structure of the spliced ​​wall panel 205 is divided into four types: the first type is that the long side and the short side of the board body of the spliced ​​wall panel 205 are both fixed with a tenon 206; the second type is that the long side of the board body of the spliced ​​wall panel 205 is fixed with a tenon 206, and the short side is opened with a tenon groove 207; the third type is that the long side of the board body of the spliced ​​wall panel 205 is opened with a tenon groove 207, and the short side is fixed with a tenon 206; the fourth type is that the long side and the short side of the board body of the spliced ​​wall panel 205 are opened with a tenon groove 207.

[0033] Considering that the final spliced ​​wall panel 205 is to be installed inside two opposite insertion slots 203, the fourth of the above four structures is not adopted in the present invention because it is inconvenient to install or will affect the strength of the wall after installation.

[0034] The present invention adopts the splicing wall panels 205 of the first three structures as the basis for wall assembly, ensuring that a single splicing wall panel 205 can be installed inside the plug-in slot 203, and the splicing wall panels 205 of different structures can be connected by mortise and tenon joints, so that they can be assembled into a box-type substation that meets the size requirements according to the actual needs of the installation site, increasing the adaptation scenarios of the structure and making the assembled products more diverse.

[0035] Among them, the cross-sectional shape of the insertion groove 203 and the tenon groove 207 is the same, and the cross-sectional shape matches the cross-sectional shape of the tenon 206, and the above cross-sectional shape is T-shaped or dovetail-shaped, thereby improving the installation stability of the spliced ​​wallboard 205.

[0036] The above-mentioned assembly structure of the present invention only requires the operator to make a preliminary estimate of the site, select a corner of the box-type substation, install the first corner column 201 on the base 101 by installing the angle iron 202, and then start installing the spliced ​​wall panels 205 along one side. The spliced ​​wall panels 205 are reasonably assembled and arranged according to actual construction needs, and the straight-faced columns 204 are installed at intervals to improve the strength of the wall; after splicing to the appropriate position, the second corner column 201 is installed, and the splicing installation of the second wall is started, and so on to complete the installation of all walls.

[0037] On the one hand, the above-mentioned installation structure and installation method realize the unitization of materials, facilitate transfer and transportation, and reduce transportation costs; on the other hand, they are easy to install and simple to operate, and can greatly improve installation efficiency; on the other hand, the size of the box-type substation can be flexibly adjusted through different splicing methods, and the adaptability and selectivity are stronger.

[0038] For further explanation of the present invention, see Figure 1 , Figure 2 , Figure 5 The wall unit 200 also includes a door post 208, the inner and outer sides of the bottom of the door post 208 are fixedly mounted on the upper surface of the base 101 through corresponding mounting angle irons 202, a first side of the door post 208 is provided with a plug-in groove 203 along its height direction, a second side of the door post 208 is hinged with a first end of a door panel 209, the door panel 209 is arranged between the two door posts 208, and a door handle 210 is fixedly mounted on the door panel 209.

[0039] During the installation of the wall, door posts 208 and door panels 209 are installed at appropriate positions for subsequent entry and exit of the box-type substation, facilitating the operation and maintenance of the substation.

[0040] The door post 208 is connected to a plurality of tenons 206 fixed on the side of the board body of the spliced ​​wall panel 205 through a plug-in slot 203 provided on its first side, and the door post 208 is further fixedly mounted on the base 101 through a plurality of mounting angle irons 202 at the bottom thereof.

[0041] Among them, a single-door or double-door door panel 209 can be installed between the two door posts 208, but it is worth noting that the spacing between the two installed door posts 208 is a positive integer multiple of the long side length of the spliced ​​wall panel 205, which is convenient for the combined installation of the wall opposite to the door posts 208.

[0042] Of course, those skilled in the art can flexibly adjust the width of the door panel 209 by the distance between the two door posts 208 , so as to adapt the installation of the door posts 208 .

[0043] For further explanation of the present invention, see Figure 1 , Figure 2 as well as Figure 6 to Figure 8 A top unit 300 is installed on the top of the wall unit 200. The top unit 300 includes a top plate 301 and a telescopic plate 302. A telescopic plate 302 is slidably installed on both sides of the bottom of the top plate 301. A plurality of guide grooves 303 are opened along the length direction of the telescopic plate 302 on one side of the bottom close to the middle part of the top plate 301. A guide rod 304 is slidably arranged in the guide groove 303. The guide rod 304 is fixedly connected to the top plate 301. Through the configuration relationship between the guide groove 303 and the guide rod 304, the telescopic plate 302 can slide back and forth relative to the top plate 301 along its length direction, thereby adapting to wall units 200 of different widths.

[0044] The cross-sectional shape of the guide groove 303 is T-shaped or dovetail-shaped, and the cross-sectional shape of the guide rod 304 matches the cross-sectional shape of the guide groove 303 , thereby ensuring that the telescopic plate 302 can stably slide relative to the top plate 301 .

[0045] In addition, the telescopic plate 302 is threadedly connected to the positioning bolt 305 through a threaded through hole opened at its bottom, and the top of the positioning bolt 305 can abut against the bottom of the top plate 301. When the telescopic plate 302 slides to a suitable position relative to the top plate 301, the operator tightens the positioning bolt 305 to achieve relative fixation of the telescopic plate 302 and the top plate 301, thereby facilitating the subsequent installation of the top unit 300.

[0046] In addition, in order to facilitate the assembly of the above structure, a male head 310 or a female head 320 can be installed on the two side ends of the top plate 301. The male head 310 includes a male head 311, a first mounting groove 312, a fastening bolt 313 and a fastening nut 314. The middle lower surface of the male head 311 is provided with a first mounting groove 312, and the first end of the fastening bolt 313 is hinged in the first mounting groove 312, and the fastening bolt 313 is threadedly connected with the fastening nut 314; the female head 320 includes a female head 321 and a second mounting groove 322. The female head 321 is opened in the middle of the top plate 301, and the male head 311 can be installed and configured inside the female head 321. The bottom of the female head 321 is provided with a second mounting groove 322, and the fastening bolt 313 can be configured in the second mounting groove 322, and the fastening nut 314 can abut against the bottom of the top plate 301.

[0047] According to the actual installation requirements, the present invention provides four types of structures for the top plate 301, such as Figure 6 As shown, the first type is that male heads 310 are respectively provided at both ends of the top plate 301; the second type is that female heads 320 are respectively provided at both ends of the top plate 301; the third type is that the first end of the top plate 301 is provided with a male head 310, and the second end is not provided with any structure; the fourth type is that the first end of the top plate 301 is provided with a female head 320, and the second end is not provided with any structure.

[0048] The first and second of the above four structures are used for interval arrangement in the middle of the top unit 300 to facilitate assembly, and the third and fourth are used at both ends of the top unit 300 for edge sealing.

[0049] In this structure, when two groups of top units 300 need to be assembled, the male head 311 is configured inside the female head 321. At this time, the fastening bolt 313 will be simultaneously configured in the second mounting groove 322. When the end faces of the two groups of top plates 301 are overlapped, the fastening nut 314 is tightened to achieve the connection between the two groups of top plates 301.

[0050] For further explanation of the present invention, see Fig. 9 , Fig.10A clamping portion 400 is installed on one side of the bottom of the telescopic plate 302 away from the middle position of the top plate 301, which is used to realize the installation connection between the top unit 300 and the wall unit 200. The clamping portion 400 includes a sliding groove 401, a sliding clamping block 402, an adjusting bolt 403 and a fixed clamping block 404. The sliding groove 401 is opened at the bottom of the telescopic plate 302 along the length direction. A sliding clamping block 402 sliding along the sliding groove 401 is arranged. The sliding clamping block 402 is threadedly connected with the adjusting bolt 403. The adjusting bolt 403 is rotatably installed on the telescopic plate 302. A fixed clamping block 404 is fixed on one side of the bottom of the telescopic plate 302 away from the middle of the top plate 301. The fixed clamping block 404 and the sliding clamping block 402 are arranged opposite to each other and are used together to clamp the tenon 206, so as to realize the installation of the top unit 300 on the top of the wall unit 200.

[0051] When installing the top unit 300, first adjust the relative position of the telescopic plate 302 and the top plate 301 so that the fixed clamp block 404 overlaps the outer side surface of the tenon 206, and further adjust the position of the sliding clamp block 402 by rotating the adjusting bolt 403 so that the sliding clamp block 402 overlaps the inner surface of the tenon 206. At this time, the sliding clamp block 402 and the fixed clamp block 404 jointly complete the clamping of the tenon 206, that is, the installation of the top unit 300 on the top of the wall unit 200 is achieved. Thereafter, the positioning bolts 305 are tightened to achieve relative fixation of the positions of the top plate 301 and the telescopic plate 302. Multiple top units 300 are installed in sequence by this method to achieve top installation.

[0052] In addition, in order to facilitate the installation of the top unit 300, after the wall unit 200 is installed, the tenon 206 of the topmost spliced ​​wall panel 205 should be kept higher than the upper end surfaces of the corner column 201 and the straight column 204, thereby providing the prerequisite for the sliding clamp 402 and the fixed clamp 404 to clamp the tenon 206.

[0053] In order to achieve the above effect, firstly, the heights of the corner columns 201 and the straight columns 204 are equal, and the heights of the corner columns 201 and the straight columns 204 should be set to positive even multiples of the length of the long side of the spliced ​​wallboard 205. For example, the heights of the corner columns 201 and the straight columns 204 are 4 times the height of the long side of the spliced ​​wallboard 205. Then, when the spliced ​​wallboard 205 at the bottom layer of the wall is close to the upper surface of the base 101 and has a mortise 207 on one side, the spliced ​​wallboard 205 at the top layer of the wall must have a tenon 206 on one side of the base 101, and the tenon 206 will be higher than the top of the corner column 201 and the straight column 204, so as to facilitate the clamping with the sliding clamp 402 and the fixed clamp 404 in the clamping part 400 to complete the installation of the top unit 300.

[0054] According to the embodiments of the present invention as described above, these embodiments do not describe all the details in detail, nor do they limit the invention to the only specific embodiments. Obviously, based on the above description, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can make good use of the present invention and the modified use based on the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A modular and fast-assembled compact box-type substation, comprising a base (101), characterized in that: A wall unit (200) is installed on the base (101), the wall unit (200) comprising a corner column (201) and a straight column (204), the corner column (201) and the straight column (204) being installed on the base (101) via a plurality of installation angle irons (202); The sides of the corner column (201) and the straight column (204) are respectively provided with plug-in grooves (203), and the two sets of opposite plug-in grooves (203) are used to install a spliced ​​wallboard (205). The spliced ​​wallboard (205) comprises a rectangular plate body, and a tenon (206) fixed on the side thereof and / or a tenon groove (207) provided on the side thereof, and the tenon (206) can be slidably arranged in the tenon groove (207), and the tenon (206) can also be slidably arranged in the plug-in groove (203); A top unit (300) is installed on the top of the wall unit (200), the top unit (300) comprising a top plate (301) and a telescopic plate (302), the telescopic plates (302) being slidably installed on both sides of the top plate (301), the telescopic plates (302) being provided with guide grooves (303), guide rods (304) being slidably arranged in the guide grooves (303), and the guide rods (304) being fixed to the top plate (301); A clamping portion (400) is installed at the bottom of the telescopic plate (302), and the clamping portion (400) comprises a sliding clamping block (402) and a fixed clamping block (404), which together complete the clamping of the tenon (206) on the side of the splicing wallboard (205) at the top of the wall.

2. The modular fast-assembly compact box-type substation according to claim 1 is characterized by: A male head (310) and / or a female head (320) are installed at both side ends of the top plate (301), the male head (310) comprising a male head (311), the male head (311) being fixed to the middle of the top plate (301), the male head (311) being provided with a first installation groove (312), a fastening bolt (313) being hinged in the first installation groove (312), and the fastening bolt (313) being threadedly connected to a fastening nut (314); The female head (320) comprises a female head (321), wherein the female head (321) is disposed in the middle of the top plate (301), the male head (311) can be arranged in the female head (321), a second mounting groove (322) is disposed at the bottom of the female head (321), the fastening bolt (313) can be arranged in the second mounting groove (322), and the fastening nut (314) can abut against the bottom of the top plate (301).

3. The modular fast-assembly compact box-type substation according to claim 1 is characterized by: The clamping portion (400) further comprises a sliding groove (401) and an adjusting bolt (403); the sliding groove (401) is provided at the bottom of the telescopic plate (302); a sliding clamp block (402) is slidably arranged in the sliding groove (401); the sliding clamp block (402) is threadedly connected to the adjusting bolt (403); the adjusting bolt (403) is rotatably mounted on the telescopic plate (302); the fixed clamp block (404) is arranged opposite to the sliding clamp block (402); and the fixed clamp block (404) is fixed to the telescopic plate (302).

4. The modular fast-assembly compact box-type substation according to claim 1 is characterized by: The spliced ​​wallboard (205) is an axisymmetric structure, and the length of the spliced ​​wallboard (205) is twice its width.

5. The modular fast-assembly compact box-type substation according to claim 1 is characterized by: The wall unit (200) further comprises a door post (208), wherein the door post (208) is mounted on the base (101) via the mounting angle iron (202), the insertion slot (203) is provided on a first side of the door post (208), a door panel (209) is hingedly connected to a second side of the door post (208), the door panel (209) is arranged between two door posts (208), and a door handle (210) is fixedly mounted on the door panel (209).

6. The modular fast-assembly compact box-type substation according to claim 5 is characterized by: The distance between the two doorposts (208) is a positive integer multiple of the length of the long side of the spliced ​​wallboard (205).

7. The modular fast-assembly compact box-type substation according to claim 1 is characterized by: The telescopic plate (302) is threadedly connected to the positioning bolt (305), and the top of the positioning bolt (305) can abut against the top plate (301).

8. The modular fast-assembly compact box-type substation according to claim 1 is characterized by: The cross-sectional shape of the insertion groove (203) and the tenon groove (207) is the same, and the cross-sectional shape thereof matches the cross-sectional shape of the tenon (206), and the cross-sectional shape thereof is T-shaped or dovetail-shaped.

9. The modular fast-assembly compact box-type substation according to claim 1 is characterized by: The corner columns (201) and the straight columns (204) are of equal height, and the height is a positive even multiple of the length of the long side of the spliced ​​wallboard (205).

10. The modular fast-assembly compact box-type substation according to claim 1 is characterized by: The corner column (201) is located at a corner of the wall unit (200), and its outline shape is L-shaped.

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