An assembled power distribution cabinet with adjustable internal space

Abstract

The application discloses an assembled power distribution cabinet with adjustable internal space and belongs to the technical field of power distribution cabinets. The assembled power distribution cabinet with adjustable internal space comprises edge cabinet bodies combined and installed at the top and the bottom, a middle cabinet body installed between the edge cabinet bodies at the top and the bottom, a rectangular frame body provided between the middle cabinet body and the edge cabinet bodies and used for auxiliary positioning and installation, sealing frames installed at the upper and lower end faces of the rectangular frame body, an inlay groove formed in the inner wall of one end of the middle cabinet body and the edge cabinet body close to the rectangular frame body, the sealing frame being clamped and installed in the inlay groove, a floating sub-frame body slidingly installed outside the sealing frame, and the floating sub-frame body being supported and limited on the installation surface of the edge cabinet body and the middle cabinet body. The power distribution cabinet can flexibly adjust the internal space according to the use requirement, can support and correct the inner wall of the cabinet body through a right-angle support device, can keep the linearity of the installation surface of the cabinet body, can make the stress of the assembled power distribution cabinet uniformly distributed, and can be stably used for a long time.

Description

Technical Field

[0001] This invention relates to the field of power distribution cabinet technology, specifically to an assembled power distribution cabinet with adjustable internal space. Background Technology

[0002] Smart grids are driving the transformation of power distribution equipment towards standardized modules and flexible combinations. Modular structures, through the splicing of unitized modules and spatial adjustment, enable the on-demand configuration of circuits and capacity, and adapt to the installation of components of different brands and specifications. Traditional fixed distribution cabinets have fixed internal space and fixed component layout. Expansion requires the replacement of the entire cabinet, which is time-consuming, costly, and difficult to match with equipment upgrades and dynamic changes in power load.

[0003] For example, patent CN220605217U discloses a modular power distribution cabinet, including a main structure, an internal structure, a lighting structure, and a detection structure. The main structure includes a power distribution cabinet with a rotatable door and a cable inlet at the bottom. The internal structure also includes a power distribution cabinet with an insulating layer that divides it into four cabinet units: a busbar compartment, a relay / instrument compartment, a cable compartment, and a circuit breaker compartment. A controllable switch is located inside the cable inlet. This modular power distribution cabinet, composed of four cabinet units, can be combined and disassembled as needed. Each cabinet unit has an independent function and can be used for different electrical equipment combinations. This modular design offers high flexibility and allows for customization and adjustment based on actual scenarios and requirements.

[0004] For example, the patent with announcement number CN219321848U discloses a combined power distribution cabinet, including a receiving compartment, side vertical plates, a cabinet body, and an extension compartment. The sides of the cabinet body are all open. The receiving compartments are symmetrically located on the top and bottom of any one end of the cabinet body, and the extension compartments are symmetrically located on the top and bottom of the end of the cabinet body away from the receiving compartment. The cabinet bodies are evenly distributed and interconnected, and the side vertical plates are symmetrically located on the outer side of the cabinet body.

[0005] For example, patent CN221042023U discloses a modular power distribution cabinet, which includes a power distribution cabinet composed of an upper cabinet and a lower cabinet, with multiple detachable cabinets arranged between the upper and lower cabinets. This modular power distribution cabinet, through the arrangement of multiple detachable cabinets between the upper and lower cabinets, and by providing locking plates and locking grooves on the upper cabinet, lower cabinet, and multiple detachable cabinets, allows for the selection of an appropriate number of detachable cabinets to be installed between the upper and lower cabinets, adjusting the internal space of the power distribution cabinet to meet different usage needs; however, some existing cabinets... The internal space specifications of the unit are fixed, and the power distribution capacity can only be adjusted by increasing or decreasing the number of cabinet units. It cannot be adapted to actual needs with slight spatial adjustments. Adding extra cabinet units will significantly increase the floor space, causing inconvenience to on-site layout and operation and maintenance. In addition, the modular power distribution cabinet has high requirements for the flatness of the assembly reference surface. If there are defects such as local deformation or indentation on the assembly surface, it is difficult to accurately connect the cabinet units. Moreover, the uneven stress distribution inside the cabinet after assembly can easily cause problems such as cabinet tilting and loose connections, which seriously affect the overall structural stability and long-term operational reliability of the power distribution cabinet.

[0006] To address the aforementioned issues, there is an urgent need for innovative design based on the existing power distribution cabinet. Summary of the Invention

[0007] The purpose of this invention is to provide an adjustable internal space modular power distribution cabinet to solve the problems mentioned in the background art. Some existing modular power distribution cabinets can only adjust the power distribution capacity by increasing or decreasing the number of cabinet units. The cabinet space adjustment is not flexible enough. If the cabinet has defects such as local deformation or indentation, it is difficult to accurately connect the cabinet units. After assembly, problems such as cabinet tilting and loose connections are likely to occur.

[0008] To achieve the above objectives, the present invention provides the following technical solution: an assembled distribution cabinet with adjustable internal space, comprising edge cabinets assembled at the top and bottom, a middle cabinet installed between the top and bottom edge cabinets, a rectangular frame for auxiliary positioning and installation between the middle cabinet and the edge cabinets, a sealing frame installed on the upper and lower end faces of the rectangular frame, an embedded groove opened on the inner wall of the middle cabinet and the edge cabinet near the rectangular frame, the sealing frame being snapped into the embedded groove, and a floating sub-frame slidably installed on the outside of the sealing frame, the floating sub-frame being supported and confined on the mounting surfaces of the edge cabinet and the middle cabinet, an adjustment and positioning mechanism for adjusting the internal space of the distribution cabinet provided in the edge cabinet, the middle cabinet and the rectangular frame; and a pressure support mechanism for supporting the straightness of the edge of the mounting surface of the adjustment cabinet provided in the edge cabinet and the middle cabinet.

[0009] Preferably, hollow columns are fixedly installed at the four corners inside the rectangular frame, and guide columns are fixedly installed at the four corners inside the edge cabinet and the middle cabinet. The guide columns are moved down and connected to the hollow columns. Multiple positioning holes are opened longitudinally at equal intervals on the guide columns, and insertion holes corresponding to the position and size of the positioning holes are opened on the hollow columns.

[0010] Preferably, a guide block is fixedly installed on the inner wall of the rectangular frame, and a plug rod is slidably connected through the guide block. The plug rod is slidably connected to the plug hole. An internally threaded cylinder is rotatably installed in the rectangular frame, and a threaded rod is threadedly connected to the internally threaded cylinder. The threaded rod is fixedly connected to the plug rod.

[0011] Preferably, the sealing frame has horizontally spaced heat dissipation grooves, and a positioning block is slidably connected in the heat dissipation groove. The positioning block is fixedly connected to the floating sub-frame, and a locking device is installed on the positioning block to press against the inner wall of the rectangular frame. A vertical rod is fixedly installed on the side of the insertion rod near the hollow column, and a horizontal bar is vertically fixed on the vertical rod. An anti-slip rod is fixedly installed on the side of the horizontal bar near the positioning block. A pressure groove corresponding to the position of the anti-slip rod is opened on the positioning block.

[0012] Preferably, the pressure support mechanism includes a limiting frame fixed on the four inner walls of the edge cabinet and the middle cabinet, and a right-angle support is installed through two vertically adjacent limiting frames. The right-angle support fits and supports the corner of the inner wall of the edge cabinet and the middle cabinet. An arc-shaped reinforcing rib is installed between the two opposite corners of the right-angle support.

[0013] Preferably, a hollow diagonal rod is fixedly connected to the right-angle support along the right-angle central axis, and a telescopic support rod is slidably connected in the hollow diagonal rod. A column is vertically fixed to the end face of the telescopic support rod, and the column is pressed tightly against the arc of the arc-shaped reinforcing rib.

[0014] Preferably, a cylindrical rod is fixedly installed on the outside of the hollow inclined rod, and a collar is rotatably sleeved on the cylindrical rod. A driven protrusion is fixed on the outside of the collar; a strip rod is fixedly installed on the side of the right-angle support near the collar, and the surface of the driven protrusion is in contact with the surface of the strip rod.

[0015] Preferably, a slide rail is provided on the hollow inclined rod along the central axis, and a slide column is slidably connected in the slide rail. The slide column is fixedly installed on the telescopic support rod. A power seat is fixedly installed on the slide column, and an active protrusion that fits against the surface of the power seat is fixedly installed on the outside of the collar.

[0016] Preferably, a pressure rod is rotatably mounted on the outside of the hollow column. The pressure rod is inclined between the hollow column and the column, and the end of the pressure rod near the column is arc-shaped. An elastic sheet is elastically connected between the pressure rod and the hollow column.

[0017] Preferably, the pressure rod is fixedly connected to a cam along the rotation axis, the cam is inclinedly disposed outside the hollow column, and the position of the cam corresponds laterally to that of the upright.

[0018] Compared with the prior art, the beneficial effects of the present invention are: the adjustable internal space of the assembled distribution cabinet allows for the installation of a suitable number of intermediate cabinets between the top and bottom edge cabinets according to the needs of the internal power structure installation space. Adjacent cabinets are assembled with the assistance of rectangular frames. The floating sub-frames outside the rectangular cabinets can further adjust the internal space of the distribution cabinet, greatly improving the flexibility of the distribution cabinet assembly and control, and facilitating on-site construction and adjustment.

[0019] The edge cabinet, middle cabinet, and rectangular frame are equipped with adjustment and positioning mechanisms to adjust the internal space of the distribution cabinet. According to the needs of the internal installation space of the distribution cabinet, the floating sub-frame is controlled to move outside the rectangular frame, limiting the position of the edge cabinet and middle cabinet outside the sealed frame, so as to achieve the purpose of adjusting the internal space of the distribution cabinet with small floating.

[0020] When assembling the edge cabinet, middle cabinet, and rectangular frame, the guide column is connected through the hollow column. The control rod moves laterally into the insertion hole on the side of the hollow column. The insertion rod passes through the positioning hole at the corresponding position on the guide column, locking the installation position of the guide column and the hollow column. This achieves the locking effect on the assembly structure of the edge cabinet, middle cabinet, and rectangular frame, maintaining the stability of the power distribution cabinet after assembly.

[0021] The edge cabinet and the middle cabinet are equipped with pressure support mechanisms to support and adjust the straightness of the edge of the cabinet mounting surface. Right-angle supports are set at the four corners of the inner wall of the edge cabinet and the middle cabinet, and the right-angle supports are equipped with arc-shaped reinforcing ribs. Their structure can support the cabinet assembly surface and prevent local deformation of the cabinet from affecting the assembly of the distribution cabinet.

[0022] When the control rod is connected to the hollow column, the column can be pressed by rotating the control rod. The column moves and presses against the arc-shaped reinforcing rib, causing the two corners of the right-angle support to expand outward under force. This allows the right-angle support to squeeze the inner walls of the edge cabinet and the middle cabinet. The column drives the telescopic support rod to move outward in the hollow diagonal rod. Under the transmission of the collar, the driven protrusion can be pressed against the side of the strip rod, so that the right-angle position of the right-angle support is pressed against the inner walls of the edge cabinet and the middle cabinet. This improves the support effect of the right-angle support on the inner walls of the cabinet, keeps the assembly surface of the edge cabinet and the middle cabinet relatively flat, and ensures that the stress distribution of the assembled distribution cabinet is uniform, allowing multiple cabinets to be used stably for a long time. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the assembly structure of the edge cabinet and the middle cabinet of the present invention.

[0024] Figure 2 This is a schematic diagram of the separation structure of the edge cabinet and the middle cabinet of the present invention.

[0025] Figure 3 This is a schematic diagram of the rectangular frame structure of the present invention.

[0026] Figure 4 This is a schematic diagram showing the anti-slip rod and positioning block in their separated state according to the present invention.

[0027] Figure 5 This is a schematic diagram of the right-angle support structure of the present invention.

[0028] Figure 6 This is a schematic diagram of the floating sub-frame structure of the present invention.

[0029] Figure 7 This is a schematic diagram of the internal threaded cylinder and threaded rod structure of the present invention.

[0030] Figure 8 This is a partial structural diagram of the sealing frame of the present invention.

[0031] Figure 9 This is a schematic diagram showing the connection state between the hollow column and the guide column of the present invention.

[0032] Figure 10 This is a schematic diagram of the pressure bar structure of the present invention.

[0033] Figure 11 This is a schematic diagram of the column structure of the present invention.

[0034] Figure 12 This is a schematic diagram of the cylindrical rod structure of the present invention.

[0035] Figure 13 This is a schematic diagram of the hollow diagonal bar structure of the present invention.

[0036] Figure 14 This is a schematic diagram of the combined state of the anti-slip rod and the positioning block of the present invention.

[0037] Figure 15 This is a schematic diagram of the groove structure of the present invention.

[0038] In the diagram: 1. Edge cabinet; 2. Middle cabinet; 3. Rectangular frame; 31. Sealing frame; 32. Floating sub-frame; 33. Ventilation slot; 34. Positioning block; 35. Locking device; 36. Pressure groove; 4. Embedded groove; 5. Hollow column; 6. Guide column; 61. Positioning hole; 62. Insertion hole; 7. Guide block; 8. Insert rod; 81. Internal threaded cylinder; 82. Threaded rod; 83. Upright; 84. Horizontal 85. Anti-slip rod; 9. Limiting frame; 10. Right-angle support; 11. Arc-shaped reinforcing rib; 12. Hollow diagonal rod; 121. Cylindrical rod; 122. Collar; 123. Driven protrusion; 124. Strip rod; 125. Slide rail; 126. Sliding column; 127. Power seat; 128. Active protrusion; 13. Telescopic support rod; 14. Column; 15. Pressure rod; 16. Cam; 17. Elastic plate. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Example 1: Please refer to Figure 1 - Figure 7 The present invention provides the following technical solution: an assembled power distribution cabinet with adjustable internal space, comprising edge cabinets 1 assembled at the top and bottom, a middle cabinet 2 installed between the top and bottom edge cabinets 1, a rectangular frame 3 for auxiliary positioning and installation between the middle cabinet 2 and the edge cabinets 1, sealing frames 31 installed on the upper and lower end faces of the rectangular frame 3, an embedded groove 4 opened on the inner wall of the middle cabinet 2 and the edge cabinets 1 near the rectangular frame 3, the sealing frame 31 being snapped into the embedded groove 4, and a floating sub-frame 32 slidably installed on the outside of the sealing frame 31, the floating sub-frame 32 being supported and limited on the mounting surfaces of the edge cabinets 1 and the middle cabinets 2, and an adjustment and positioning mechanism for adjusting the internal space of the power distribution cabinet provided in the edge cabinets 1, the middle cabinets 2 and the rectangular frame 3; and a pressure support mechanism for supporting the straightness of the edge of the mounting surface of the cabinets in the edge cabinets 1 and the middle cabinets 2.

[0041] Please see Figure 3 - Figure 10 Hollow columns 5 are fixedly installed at the four corners inside the rectangular frame 3. Guide columns 6 are fixedly installed at the four corners inside the edge cabinet 1 and the middle cabinet 2. The guide columns 6 are moved down and connected to the hollow columns 5. Multiple positioning holes 61 are opened longitudinally at equal intervals on the guide columns 6. Insertion holes 62 corresponding to the position and size of the positioning holes 61 are opened on the hollow columns 5.

[0042] Please see Figure 3 - Figure 10 , Figure 14 and Figure 15 A guide block 7 is fixedly installed on the inner wall of the rectangular frame 3. A plug rod 8 is slidably connected through the guide block 7 and is slidably connected to the plug hole 62. An internally threaded cylinder 81 is rotatably installed in the rectangular frame 3. A threaded rod 82 is threadedly connected to the internally threaded cylinder 81 and is fixedly connected to the plug rod 8. A heat dissipation groove 33 is opened horizontally at equal intervals on the sealing frame 31. A positioning block 34 is slidably connected in the heat dissipation groove 33. The positioning block 34 is fixedly connected to the floating sub-frame 32, and a locking device 35 is installed on the positioning block 34 to press against the inner wall of the rectangular frame 3. A vertical rod 83 is fixedly installed on the side of the plug rod 8 near the hollow column 5. A horizontal bar 84 is vertically fixed on the vertical rod 83. An anti-slip bar 85 is fixedly installed on the side of the horizontal bar 84 near the positioning block 34. A pressure groove 36 corresponding to the position of the anti-slip bar 85 is opened on the positioning block 34.

[0043] Based on the space requirements for installing electrical equipment inside the distribution cabinet, a suitable number of intermediate cabinets 2 are selected and assembled between the top and bottom sets of edge cabinets 1. A rectangular frame 3 is set between the edge cabinets 1 and the intermediate cabinets 2. The sealing frames 31 at the top and bottom of the rectangular frame 3 correspond to the upper and lower openings of the edge cabinets 1 and the intermediate cabinets 2, respectively. The edge cabinets 1 and the intermediate cabinets 2 are fitted onto the sealing frames 31 through embedded grooves 4 on their inner walls. The floating sub-frames 32 outside the sealing frames 31 support and confine them at the mounting surfaces of the edge cabinets 1 and the intermediate cabinets 2. Depending on the on-site installation conditions, the floating sub-frames 32 can... To further control the internal space of the distribution cabinet, the positioning block 34 is controlled to move longitudinally along the heat dissipation groove 33. The positioning block 34 drives the floating sub-frame 32 to move longitudinally synchronously. After adjustment, the locking device 35 is rotated to press against the inner wall of the rectangular frame 3, which initially limits the adjustment position of the positioning block 34 and the floating sub-frame 32. After the floating sub-frame 32 is fitted outside the sealing frame 31 and moves, it can limit the position of the edge cabinet 1 and the middle cabinet 2 assembled outside the sealing frame 31. By controlling the number of middle cabinets 2 installed and the moving position of the floating sub-frame 32, the internal space of the assembled distribution cabinet can be flexibly adjusted.

[0044] When the edge cabinet 1 and the middle cabinet 2 are assembled with the rectangular frame 3, the guide posts 6 on the inner walls of the edge cabinet 1 and the middle cabinet 2 move and extend into the sealing frame 31. The guide posts 6 penetrate into the hollow column 5 inside the inner wall of the sealing frame 31 (keeping the positioning holes 61 on the guide posts 6 and the insertion holes 62 on the hollow column 5 in a continuous correspondence). The position of the floating sub-frame 32 is controlled by adjusting the position corresponding to the positioning holes 61 next to the hollow column 5 to keep the floating sub-frame 32 supported and confined within the edge cabinet 1 and the middle cabinet 2. (Next to cabinet 2), control the rotation of the internal threaded cylinder 81. Under the threaded transmission of the internal threaded cylinder 81 and the threaded rod 82, the threaded rod 82 and the insertion rod 8 can be controlled to move laterally. The insertion rod 8 moves laterally through the inside of the guide block 7. The insertion rod 8 moves close to the hollow column 5. The insertion rod 8 passes through the insertion hole 62 opened on the hollow column 5 and enters the positioning hole 61 opened on the guide column 6. The insertion rod 8 can lock the insertion position of the guide column 6 in the hollow column 5, and maintain the installation stability of the assembled distribution cabinet.

[0045] During the lateral movement of the insertion rod 8, the upright rod 83 and the horizontal rod 84 move synchronously. The anti-slip rod 85 on the horizontal rod 84 moves closer to the positioning block 34 and engages with the pressure groove 36 on the positioning block 34. The anti-slip rod 85 presses against the positioning block 34, so that the positioning block 34 is pressed against the inner wall of the sealing frame 31, thereby further limiting the movement position of the positioning block 34.

[0046] Example 2: Please refer to Figure 5 - Figure 12 Based on Embodiment 1, a pressure support mechanism is also disclosed, the specific structure of which is as follows: The pressure support mechanism includes limiting frames 9 fixed on the four inner walls of the edge cabinet 1 and the middle cabinet 2. A right-angle support 10 is installed through two vertically adjacent limiting frames 9. The right-angle support 10 is fitted and supported at the corner of the inner wall of the edge cabinet 1 and the middle cabinet 2. An arc-shaped reinforcing rib 11 is installed between the two diagonals of the right-angle support 10. A hollow diagonal rod 12 is fixedly connected to the right-angle support 10 along the right-angle central axis. A telescopic support rod 13 is slidably connected in the hollow diagonal rod 12. A column 14 is vertically fixed to the end face of the telescopic support rod 13. The column 14 is pressed and fitted against the arc of the arc-shaped reinforcing rib 11.

[0047] Please see Figure 11 - Figure 13A cylindrical rod 121 is fixedly installed on the outside of the hollow diagonal rod 12. A collar 122 is rotatably sleeved on the cylindrical rod 121, and a driven protrusion 123 is fixedly installed on the outside of the collar 122. A strip rod 124 is fixedly installed on the side of the right-angle support 10 near the collar 122, and the surface of the driven protrusion 123 is in contact with the surface of the strip rod 124. A slide rail 125 is opened on the hollow diagonal rod 12 along the central axis. A sliding column 126 is slidably connected in the slide rail 125. The sliding column 126 is fixedly installed on the telescopic support rod 13. A power seat 127 is fixedly installed on the sliding column 126, and an active protrusion 128 that is in contact with the surface of the power seat 127 is fixedly installed on the outside of the collar 122.

[0048] Please see Figure 11 - Figure 13 A pressure rod 15 is rotatably mounted on the outside of the hollow column 5. The pressure rod 15 is inclined between the hollow column 5 and the column 14, and the end of the pressure rod 15 near the column 14 is arc-shaped. An elastic plate 17 is elastically connected between the pressure rod 15 and the hollow column 5. A cam 16 is fixedly connected to the pressure rod 15 along the rotation axis. The cam 16 is inclined on the outside of the hollow column 5, and the position of the cam 16 corresponds laterally to that of the column 83.

[0049] Right-angle supports 10 are installed at the four corners of the inner walls of the assembly surfaces of the edge cabinet 1 and the middle cabinet 2. The right-angle supports 10 effectively support all four sides of the cabinet, preventing local deformation of the assembly surfaces of the edge cabinet 1 and the middle cabinet 2. Simultaneously, when the position of the adjusting rod 8 is moved, the upright rod 83 on the rod 8 moves and contacts the cam 16. After the outer arc surface of the cam 16 contacts the upright rod 83, it is pushed, causing the cam 16 and the pressure rod 15 to rotate. The pressure rod 15 rotates and presses against the column 14, applying a compressive force to the column 14. The column 14 is pressed against the middle position of the arc-shaped reinforcing rib 11. The two ends of the arc-shaped reinforcing rib 11 press against the two corners of the right-angle support 10, causing the two corners of the right-angle support 10 to press firmly against the inner walls of the edge cabinet 1 and the middle cabinet 2. At the same time, the column 14 drives the extension... The telescopic support rod 13 moves outward from the hollow diagonal rod 12. The sliding column 126 on the telescopic support rod 13 slides along the slide rail 125. The power seat 127 on the sliding column 126 moves and presses the active protrusion 128. The active protrusion 128 drives the collar 122 to rotate around the outside of the cylindrical rod 121. The driven protrusion 123 on the collar 122 rotates and presses against the side of the strip rod 124, applying pressure to the strip rod 124. This causes the corner of the right-angle support 10 to also press against the corner of the edge cabinet 1 and the middle cabinet 2. The right-angle support 10 is pressed against the inside of the cabinet, which allows the cabinet to expand outward, correcting some local deformations and dents in the cabinet, maintaining the straightness of the mounting surfaces of the edge cabinet 1 and the middle cabinet 2, making the assembly of the power distribution cabinet precise, the stress distribution uniform after assembly, and enabling stable use for a long time.

[0050] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A modular power distribution cabinet with adjustable internal space, comprising edge cabinets assembled at the top and bottom, and an intermediate cabinet installed between the top and bottom edge cabinets, characterized in that: A rectangular frame for auxiliary positioning and installation is provided between the middle cabinet and the edge cabinet. A sealing frame is installed on the upper and lower end faces of the rectangular frame. An embedded groove is opened on the inner wall of the middle cabinet and the edge cabinet near the rectangular frame. The sealing frame is snapped into the embedded groove. A floating sub-frame is slidably installed on the outside of the sealing frame. The floating sub-frame is supported and limited on the mounting surface of the edge cabinet and the middle cabinet. An adjustment and positioning mechanism for adjusting the internal space of the power distribution cabinet is provided in the edge cabinet, the middle cabinet and the rectangular frame. Hollow columns are fixedly installed at the four corners inside the rectangular frame, and guide columns are fixedly installed at the four corners inside the edge cabinet and the middle cabinet. The guide columns are moved down and connected to the hollow columns. Multiple positioning holes are opened longitudinally at equal intervals on the guide columns, and insertion holes corresponding to the position and size of the positioning holes are opened on the hollow columns. A guide block is fixedly installed on the inner wall of the rectangular frame. A plug rod is slidably connected through the guide block and moves laterally to connect with the plug hole. An internally threaded cylinder is rotatably installed in the rectangular frame. A threaded rod is threadedly connected to the internally threaded cylinder and is fixedly connected to the plug rod. The sealing frame has horizontally spaced heat dissipation grooves, and a positioning block is slidably connected in the heat dissipation groove. The positioning block is fixedly connected to the floating sub-frame, and a locking device is installed on the positioning block to press against the inner wall of the rectangular frame. A vertical pole is fixedly installed on the side of the insertion rod near the hollow column, and a horizontal bar is vertically fixed on the vertical pole. An anti-slip bar is fixedly installed on the side of the horizontal bar near the positioning block. A pressure groove is opened on the positioning block corresponding to the position of the anti-slip bar. Pressure support mechanisms are provided in the edge cabinets and middle cabinets to support and adjust the straightness of the edge of the cabinet mounting surface; The pressure support mechanism includes a limiting frame fixed to the four inner walls of the edge cabinet and the middle cabinet. A right-angle support is installed through two vertically adjacent limiting frames. The right-angle support fits and supports the corner of the inner wall of the edge cabinet and the middle cabinet. An arc-shaped reinforcing rib is installed between the two opposite corners of the right-angle support. A hollow diagonal bar is fixedly connected to the right-angle support along the right-angle central axis. A telescopic support rod is slidably connected in the hollow diagonal bar. A column is vertically fixed to the end face of the telescopic support rod. The column is pressed tightly against the arc of the arc-shaped reinforcing rib. A pressure bar is rotatably installed on the outside of the hollow column. The pressure bar is inclined between the hollow column and the column, and the end of the pressure bar near the column is arc-shaped. An elastic plate is elastically connected between the pressure bar and the hollow column. The pressure rod is fixedly connected to a cam along the rotation axis. The cam is inclined and set on the outside of the hollow column, and the position of the cam corresponds laterally to that of the upright.

2. The assembled power distribution cabinet with adjustable internal space according to claim 1, characterized in that: A cylindrical rod is fixedly installed on the outside of the hollow inclined rod, and a collar is rotatably sleeved on the cylindrical rod. A driven protrusion is fixed on the outside of the collar. A strip rod is fixedly installed on the side of the right-angle support near the collar, and the surface of the driven protrusion is in contact with the surface of the strip rod.

3. The assembled power distribution cabinet with adjustable internal space according to claim 2, characterized in that: A slide rail is provided on the hollow diagonal bar along the central axis, and a sliding column is slidably connected in the slide rail. The sliding column is fixedly installed on the telescopic support bar. A power seat is fixedly installed on the sliding column, and an active protrusion that fits against the surface of the power seat is fixedly installed on the outside of the collar.

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