Assembly type power switch cabinet

Abstract

The invention discloses an assembly type power switch cabinet, and particularly relates to the technical field of power switch cabinets, the assembly type power switch cabinet comprises a cabinet body frame, a cabinet door, a top plate, a back plate, a bottom plate and two side plates, the cabinet body frame comprises an upper frame body, a lower frame body and four vertical pipes, and the four vertical pipes are distributed between the upper frame body and the lower frame body in a rectangular shape; insertion blocks are welded and fixed to the bottom of the upper frame body and the top of the lower frame body, and insertion holes for the insertion blocks to be inserted are formed in the two ends of each vertical pipe correspondingly, and the insertion blocks on the upper frame body and the insertion blocks on the lower frame body are directly inserted into the four vertical pipes correspondingly. The upper frame body, the lower frame body and the vertical pipes can be locked through the locking mechanism, and meanwhile, the two vertical pipes can be further tensioned, so that the assembling operation of the power switch cabinet can be quickly completed. Therefore, the assembly of the whole power switch cabinet is more efficient.

Description

Technical Field

[0001] The present invention relates to the field of power switch cabinets, and particularly to an assembled power switch cabinet. Background Art

[0002] A switch cabinet is an electrical device. The external line of the switch cabinet first enters the main control switch inside the cabinet, and then enters the sub-control switch. Each branch is set as required, including one or more low-voltage switch devices and related control, measurement, signal, protection, regulation and other devices; Currently, during the assembly process of power switch cabinets, the columns and crossbeams need to be placed according to the positions on the drawings and fixed with clamps or temporary bolts. The connection between the columns and crossbeams is welded full or fillet welded, and after welding, it needs to be polished flat. For the modular designed cabinet body, that is, the assembled cabinet body, its frame is divided into modules such as the base, side plates, top plate, etc. First, the base is assembled, and then the side plates and top plate are installed layer by layer. The modules are fixed with bolts or buckles. However, no matter which method, for the existing power switch cabinets, the assembly process of the cabinet body frame part is still relatively complex and the assembly efficiency is low. Summary of the Invention

[0003] The purpose of the present invention is to provide an assembled power switch cabinet to solve the above deficiencies in the technology.

[0004] An assembled power switch cabinet includes a cabinet body frame, a cabinet door, a top plate, a back plate, a bottom plate and two side plates. The cabinet body frame includes an upper frame body, a lower frame body and four vertical pipes. The four vertical pipes are distributed in a rectangular shape between the upper frame body and the lower frame body. Plug blocks are welded and fixed at the bottom of the upper frame body and the top of the lower frame body. Through holes for the plug blocks to insert are opened at both ends of the vertical pipes; Wherein, a locking mechanism is arranged between the vertical pipes on both sides of the cabinet body frame. The locking mechanism is used to fix the plug block and the vertical pipe, fix the two side plates, and also used to tension the two vertical pipes.

[0005] Preferably, the cabinet door, the top plate, the back plate, the bottom plate and the two side plates are respectively installed at the front, top, back, bottom and left and right sides of the cabinet body frame.

[0006] Preferably, the locking mechanism includes two connection boxes. The two connection boxes are respectively located between the two vertical pipes. A plug rod penetrates through one side of the connection box facing the vertical pipe. Through holes for the plug rod to pass through are opened on the outer wall of the vertical pipe. Circular holes for the plug rod to insert are opened on the outer wall of the plug block; A pushing component for pushing the plug rod towards the plug block and a reset component for moving the plug rod away from the plug block are arranged inside the connection box.

[0007] Preferably, the pushing component includes a connecting rod located between two connecting boxes. The end of the connecting rod extends into the interior of the connecting box, and the connecting rod is rotatably connected to the connecting box through a bearing. An adjusting column is fixed to the end of the connecting rod. One end of the adjusting column relative to the connecting rod has an inclined end face, and an annular cavity is formed on the inclined end face. A push rod is fixed to the end of the connecting rod facing the adjusting column, and a first ball is installed at the end of the push rod. Part of the ball body of the first ball is located in the annular cavity.

[0008] Preferably, the reset component includes a limiting ring fixed to the outside of the insertion rod and located inside the connecting box. A first spring is sleeved on the outside of the insertion rod between the limiting ring and the connecting box.

[0009] Preferably, a rectangular guide rod is fixed to the inner top of the connecting box, and a slidable connecting ring is sleeved on the outside of the rectangular guide rod. The connecting ring is connected to the limiting ring.

[0010] Preferably, an annular groove is formed on the outer wall of the adjusting column in an inclined shape, and the annular groove is parallel to the annular cavity; A slide rail is fixed to the inner bottom of the connecting box. A slider is slidably connected to the slide rail. A second ball is installed on the top of the slider. Part of the ball body of the second ball is located in the annular groove. A connecting plate is fixed to the bottom of the slider. Rectangular holes for the movement of the connecting plate are formed in the interior of the slide rail and the bottom of the connecting box. A claw is fixed to the bottom of the connecting plate; A support block is fixed to the lower side of the connecting box on one side of the riser pipe. A T-shaped groove is formed on the top of the support block. A cross bar is fixed to the head area of the T-shaped groove. The claw can be hooked on the outside of the cross bar, and the width of the tail area of the T-shaped groove is the same as the width of the claw.

[0011] Preferably, insertion pieces are symmetrically fixed to one side of the side plate. A slot matching the insertion pieces is formed on the outer wall of the connecting box. A cylindrical hole for the insertion rod to pass through is formed in the interior of the insertion piece.

[0012] Preferably, a locking plate is fixed to the middle of the connecting rod, and a locking mechanism for locking the locking plate is arranged at the bottom of the upper frame body; The locking mechanism includes a limiting frame. A limiting hole for the insertion of the locking plate is formed in the middle of the limiting frame. Fixing columns penetrate through both sides of the limiting frame. A limiting disk is fixed to the bottom of the fixing column. The top of the fixing column is fixedly connected to the upper frame body, and a second spring is sleeved on the outside of the fixing column between the limiting frame and the limiting frame.

[0013] Preferably, the bottom edge of the limiting frame and the top edge of the locking plate are both in arc transition.

[0014] In the above technical solution, the technical effects and advantages provided by the present invention are as follows: When assembling the "cabinet frame" of the power switch cabinet in the present invention, the insertion blocks on the upper frame and the lower frame can be directly inserted into the corresponding four vertical pipes respectively, and then the locking operation of the upper frame, the lower frame and the vertical pipes can be completed through the locking mechanism. At the same time, the two vertical pipes can be further tightened, thus quickly completing the assembly operation of the power switch cabinet. Since no bolts, rivets and welding operations are required during the assembly process of the "cabinet frame", the assembly of the entire power switch cabinet can be made more efficient; Moreover, the locking mechanism also adopts a modular design. Only by placing the connection box on the support block and then rotating the locking plate can the locking mechanism operation be completed. Therefore, the entire assembly process is also more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings; Figure 1 It is the external view of the present invention; Figure 2 It is the exploded view of the present invention; Figure 3 It is the structural schematic diagram of the cabinet frame of the present invention; Figure 4 It is the structural schematic diagram of the cabinet frame after the upper frame is separated in the present invention; Figure 5 It is the external view of the present invention when connection boxes are installed at both ends of the connecting rod; Figure 6 It is the structural schematic diagram of the slot in the present invention; Figure 7 It is one of the internal structural schematic diagrams of the connection box in the present invention; Figure 8 It is the second internal structural schematic diagram of the present invention; Figure 9 It is the structural schematic diagram of the slide rail in the present invention; Figure 10 It is the structural schematic diagram of the support block in the present invention; Figure 11 It is the structural schematic diagram of the locking plate entering the limit frame in the present invention; Figure 12 It is the structural schematic diagram of the limit frame in the present invention; Figure 13 It is the structural schematic diagram of the insertion piece in the present invention.

[0016] Explanation of the reference numerals: 1. Side plate; 2. Cabinet door; 3. Top plate; 4. Back plate; 5. Bottom plate; 6. Upper frame; 7. Vertical pipe; 8. Insert block; 9. Lower frame; 10. Connection box; 11. Support block; 12. Connecting rod; 13. Locking plate; 14. Insert piece; 15. Slot; 16. Insert rod; 17. Second spring; 18. T-shaped groove; 19. Limit ring; 20. First spring; 21. Connection ring; 22. Rectangular guide rod; 23. Thrust rod; 24. First ball; 25. Adjusting column; 26. Annular groove; 27. Second ball; 28. Slide block; 29. Slide rail; 30. Hook; 31. Annular cavity; 32. Connecting plate; 33. Insert hole; 34. Through hole; 35. Cross bar; 36. Limit frame; 37. Limit hole; 38. Limit disc; 39. Fixed column. Detailed implementation manner

[0017] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further introduced in detail below in conjunction with the accompanying drawings.

[0018] The present invention provides an assembled power switch cabinet as shown in Figures 1-13 which includes a cabinet frame, a cabinet door 2, a top plate 3, a back plate 4, a bottom plate 5 and two side plates 1. The cabinet frame includes an upper frame 6, a lower frame 9 and four vertical pipes 7. The upper frame 6 and the lower frame 9 are welded by four square pipes. The four vertical pipes 7 are distributed in a rectangle between the upper frame 6 and the lower frame 9. Insert blocks 8 are welded and fixed at the bottom of the upper frame 6 and the top of the lower frame 9. Insert holes 33 for inserting the insert blocks 8 are opened at both ends of the vertical pipes 7. Among them, a locking mechanism is provided between the vertical pipes 7 on both sides of the cabinet frame. The locking mechanism is used to fix the insert block 8 and the vertical pipe 7, fix the two side plates 1, and also tighten the two vertical pipes 7.

[0019] Furthermore, the cabinet door 2, the top plate 3, the back plate 4, the bottom plate 5 and the two side plates 1 are respectively installed at the front, top, back, bottom and left and right sides of the cabinet frame. The installation methods of the cabinet door 2, the top plate 3, the back plate 4 and the bottom plate 5 with the cabinet frame are conventional technologies, which can be welded, bolted or riveted or other methods, and will not be elaborated here.

[0020] Refer to Figures 3-10 , the locking mechanism includes two connection boxes 10. The two connection boxes 10 are respectively located between the two vertical pipes 7. An insert rod 16 penetrates through one side of the connection box 10 facing the vertical pipe 7. A through hole 34 for the insert rod 16 to pass through is opened on the outer wall of the vertical pipe 7. A round hole for the insert rod 16 to insert into is opened on the outer wall of the insert block 8. A pushing component for pushing the insert rod 16 towards the insert block 8 and a reset component for moving the insert rod 16 away from the insert block 8 are arranged inside the connection box 10.

[0021] Reference Figures 3-8 The pushing component includes a connecting rod 12. The connecting rod 12 is located between two connecting boxes 10. The end of the connecting rod 12 extends into the connecting box 10. The connecting rod 12 is rotatably connected to the connecting box 10 through a bearing. An adjusting column 25 is fixed to the end of the connecting rod 12. One end of the adjusting column 25 relative to the connecting rod 12 is an inclined end face. An annular cavity 31 is formed on the inclined end face. A push rod 23 is fixed to the end of the connecting rod 12 facing the adjusting column 25. A first ball 24 is installed at the end of the push rod 23. Part of the ball body of the first ball 24 is located in the annular cavity 31.

[0022] Furthermore, the reset component includes a limiting ring 19. The limiting ring 19 is fixed to the outside of the inserting rod 16 and is located inside the connecting box 10. A first spring 20 is sleeved on the outside of the inserting rod 16 between the limiting ring 19 and the connecting box 10. The first spring 20 and the limiting ring 19 can always ensure that the inserting rod 16 has a tendency to move towards the adjusting column 25, so that the first ball 24 can always be in stable contact with the annular cavity 31.

[0023] Furthermore, a rectangular guide rod 22 is fixed to the inner top of the connecting box 10. A slidable connecting ring 21 is sleeved on the outside of the rectangular guide rod 22. The connecting ring 21 is connected to the limiting ring 19. The connecting ring 21 and the rectangular guide rod 22 can further improve the stability of the inserting rod 16 during the moving process.

[0024] Refer to Figures 3-12 An annular groove 26 is formed on the outer wall of the adjusting column 25 in an inclined shape. The annular groove 26 is parallel to the annular cavity 31 to ensure that when the inserting rod 16 enters the inserting block 8 subsequently, the claw 30 can also "hook tightly" the cross bar 35 at the same time, improving the structural strength of the entire "cabinet frame" after assembly; A slide rail 29 is fixed to the inner bottom of the connecting box 10. A slider 28 is slidably connected to the slide rail 29. A second ball 27 is installed at the top of the slider 28. Part of the ball body of the second ball 27 is located in the annular groove 26. A connecting plate 32 is fixed to the bottom of the slider 28. Rectangular holes for the movement of the connecting plate 32 are formed in the inside of the slide rail 29 and the bottom of the connecting box 10. A claw 30 is fixed to the bottom of the connecting plate 32; On one side of the riser pipe 7, a support block 11 is fixed below the connection box 10. A T-shaped groove 18 is formed at the top of the support block 11. A cross bar 35 is fixed in the head region of the T-shaped groove 18. The claw 30 can be hooked outside the cross bar 35. The width of the tail region of the T-shaped groove 18 is the same as the width of the claw 30. After the connection box 10 is placed on the top of the support block 11, the claw 30 will enter the tail of the T-shaped groove at the top of the support block 11, which can prevent the connection box 10 from shaking and improve the stability of the connection box 10. During the working process of the locking mechanism, the connecting plate 32 will drive the claw 30 to move inside the T-shaped groove 18 until the claw 30 "hooks tightly" the cross bar 35 inside the T-shaped groove 18 to tighten the two riser pipes 7, further improving the structural strength and stability of the entire assembled power switch cabinet.

[0025] Furthermore, on one side of the side plate 1, insertion pieces 14 are symmetrically fixed. A slot 15 matching the insertion pieces 14 is formed on the outer wall of the connection box 10. A cylindrical hole for the insertion rod 16 to pass through is formed inside the insertion piece 14. When the locking mechanism locks the "cabinet frame" later, the side plate 1 can be locked and fixed at the same time, further eliminating the installation process of the side plate 1.

[0026] Furthermore, a locking plate 13 is fixed in the middle of the connecting rod 12. A locking mechanism for locking the locking plate 13 is arranged at the bottom of the upper frame body 6; The locking mechanism includes a limiting frame 36. A limiting hole 37 for the locking plate 13 to insert is formed in the middle of the limiting frame 36. Fixing columns 39 penetrate through both sides of the limiting frame 36. A limiting disc 38 is fixed at the bottom of the fixing column 39. The top of the fixing column 39 is fixedly connected to the upper frame body 6. A second spring 17 is sleeved outside the fixing column 39 between the limiting frame 36 and the limiting frame 36. After the locking plate 13 is inserted into the limiting hole 37 inside the limiting frame 36, the locking plate 13 can be limited to prevent the locking plate 13 from loosening.

[0027] Furthermore, the bottom edge of the limiting frame 36 and the top edge of the locking plate 13 are both in arc transition, so that when the locking plate 13 contacts the limiting frame 36, it can rotate along the arc-transitioned edge and enter the limiting frame 36.

[0028] The overall working principle is as follows: When assembling the "cabinet body frame", first place the lower frame 9 horizontally on the ground, then place the "lower" locking assembly on top of the lower frame 9. After that, insert the four vertical pipes 7 into the four insertion blocks 8 of the lower frame 9 respectively. Then place the "upper" locking assembly between the two vertical pipes 7, and then insert the insertion blocks 8 of the upper frame 6 into the four vertical pipes 7 respectively, thus quickly assembling the "cabinet body frame". After that, install the cabinet door 2, the top plate 3, the back plate 4, the bottom plate 5 and the two side plates 1. Since there is no need for bolts, rivets and welding operations during the assembly process of the "cabinet body frame", the assembly of the entire power switch cabinet can be made more efficient; When installing the locking mechanism, the "upper" locking mechanism is described as follows: Two connection boxes 10 can be placed on top of the two support blocks 11 respectively. At this time, it is necessary to ensure that the locking plate 13 faces downward (this is to ensure that the insertion rod 16 can be retracted into the interior of the connection box 10 under the action of the reset assembly, so as to prevent the insertion rod 16 from hindering the connection box 10 from entering between the two vertical pipes 7). After the connection box 10 is placed on top of the support block 11, the claw 30 will enter the tail of the T-shaped groove on the top of the support block 11, thereby preventing the connection box 10 from shaking and improving the stability of the connection box 10; Meanwhile, insert the insertion piece 14 on the side plate 1 into the slot 15 (so that when the locking mechanism locks the "cabinet body frame" later, the side plate 1 can also be locked and fixed at the same time, further eliminating the installation process of the side plate 1. If the use environment of the power switch cabinet requires sealing, sealant or rubber strips can be applied between the "cabinet door 2, the top plate 3, the back plate 4, the bottom plate 5 and the two side plates 1" and the "cabinet body frame" by yourself. This is a conventional technology. If the power switch cabinet requires better sealing performance, the traditional shell assembly method can also be used for all. The assembly method of the side plate 1 in this case is only applicable to power switch cabinets with low sealing requirements); After the connection box 10 is installed, rotate the locking plate 13 upward by 180°. During the process of rotating the locking plate 13 upward by 180°, the adjusting column 25 will also be rotated synchronously. During the rotation of the adjusting column 25, the first ball 24 will roll in the annular cavity 31 on the end face of the adjusting column 25. At the same time, since the end face of the adjusting column 25 is inclined, the first ball 24, the ejector rod 23 and the insertion rod 16 will be "pushed" out of the connection box 10. Therefore, the insertion rod 16 will pass through the cylindrical hole of the insertion piece 14, the through hole 34 of the vertical pipe 7 and finally enter the round hole inside the insertion block 8, thereby realizing the fixation of the side plate 1 and the locking of the vertical pipe 7 and the upper frame 6. Similarly, the locking process of the vertical pipe 7 and the lower frame 9 is also like this; Meanwhile, during the rotation of the adjusting column 25, the second ball 27 will roll in the annular groove 26 outside the adjusting column 25. Since the annular groove 26 is also inclined on the outer side of the adjusting column 25, it will drive the second ball 27 and the slider 28 as a whole to move along the slide rail 29 in the direction of "away from" the riser 7. During the movement of the slider 28, the connecting plate 32 will drive the claw 30 to move inside the T-shaped groove 18 until the claw 30 "hooks tightly" the cross bar 35 inside the T-shaped groove 18 to tighten the two risers 7, further improving the structural strength and stability of the entire assembled power switch cabinet (the state inside the connection box 10 after the "cabinet frame" is assembled, specifically refer to Figure 7 and Figure 8 ); Before the locking plate 13 is about to rotate 180°, the limit frame 36 can be moved upward. When the locking plate 13 rotates 180°, release the limit frame 36. Under the action of the second spring 17, the limit frame 36 can be reset, and then the locking plate 13 can be inserted into the limit hole 37 inside the limit frame 36 to limit the locking plate 13 and prevent the loosening of the locking plate 13 from affecting the firmness of the "cabinet frame"; So far, the entire "cabinet frame" of the power switch cabinet is assembled. Then, the cabinet door 2, the top plate 3, the back plate 4, and the bottom plate 5 can be assembled according to the conventional technology. Finally, the power switch cabinet is assembled; Briefly speaking, after the "cabinet frame" of the power switch cabinet is built, by using a modular locking mechanism, only by placing the connection box 10 in the locking mechanism on the support block 11 and then rotating the locking plate 13, the operation of the locking mechanism can be completed. Therefore, the entire assembly process of the power switch cabinet is more convenient.

[0029] Only some exemplary embodiments of the present invention have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present invention.

Claims

1. An assembled power switch cabinet, comprising a cabinet body frame, a cabinet door (2), a top plate (3), a back plate (4), a bottom plate (5) and two side plates (1), characterized in that: The cabinet body frame includes an upper frame body (6), a lower frame body (9) and four vertical pipes (7). The four vertical pipes (7) are distributed in a rectangular shape between the upper frame body (6) and the lower frame body (9). Plug blocks (8) are welded and fixed to the bottom of the upper frame body (6) and the top of the lower frame body (9). Insertion holes (33) for inserting the plug blocks (8) are provided at both ends of the vertical pipes (7); Among them, a locking mechanism is arranged between the vertical pipes (7) on both sides of the cabinet body frame. The locking mechanism is used to fix the plug block (8) to the vertical pipe (7), to fix the two side plates (1), and also to tension the two vertical pipes (7); The locking mechanism includes two connection boxes (10). The two connection boxes (10) are respectively located between the two vertical pipes (7). An insertion rod (16) penetrates through one side of the connection box (10) facing the vertical pipe (7). A through hole (34) for the insertion rod (16) to pass through is provided on the outer wall of the vertical pipe (7). A round hole for the insertion rod (16) to insert into is provided on the outer wall of the plug block (8); A pushing component for pushing the insertion rod (16) towards the plug block (8) and a reset component for moving the insertion rod (16) away from the plug block (8) are arranged inside the connection box (10); The pushing component includes a connecting rod (12). The connecting rod (12) is located between the two connection boxes (10). The end of the connecting rod (12) extends into the connection box (10). The connecting rod (12) is rotatably connected to the connection box (10) through a bearing. An adjusting column (25) is fixed to the end of the connecting rod (12). One end of the adjusting column (25) relative to the connecting rod (12) has an inclined end face. An annular cavity (31) is provided on the inclined end face. A top rod (23) is fixed to the end of the connecting rod (12) facing the adjusting column (25). A first ball (24) is installed at the end of the top rod (23). Part of the ball body of the first ball (24) is located in the annular cavity (31).

2. The prefabricated power switch cabinet according to claim 1, wherein: The cabinet door (2), the top plate (3), the back plate (4), the bottom plate (5) and the two side plates (1) are respectively installed on the front, top, back, bottom and left and right sides of the cabinet body frame.

3. An assembled power switchgear according to claim 1, characterized in that: The reset component includes a limit ring (19). The limit ring (19) is fixed to the outside of the insertion rod (16), and the limit ring (19) is located inside the connection box (10). A first spring (20) is sleeved on the outside of the insertion rod (16) between the limit ring (19) and the connection box (10).

4. The prefabricated power switch cabinet according to claim 3, characterized in that: A rectangular guide rod (22) is fixed to the top inside the connection box (10). A slidable connection ring (21) is sleeved on the outside of the rectangular guide rod (22). The connection ring (21) is connected to the limit ring (19).

5. The prefabricated power switch cabinet according to claim 1, wherein: An annular groove (26) is provided on the outer wall of the adjusting column (25) in an inclined shape. The annular groove (26) is parallel to the annular cavity (31); A slide rail (29) is fixed to the inner bottom of the connection box (10). A slider (28) is slidably connected to the slide rail (29). A second ball (27) is installed on the top of the slider (28). Part of the ball body of the second ball (27) is located in the annular groove (26). A connecting plate (32) is fixed to the bottom of the slider (28). Rectangular holes for the movement of the connecting plate (32) are formed in the interior of the slide rail (29) and the bottom of the connection box (10). A claw (30) is fixed to the bottom of the connecting plate (32). A support block (11) is fixed to one side of the riser pipe (7) and below the connection box (10). A T-shaped groove (18) is formed in the top of the support block (11). A cross bar (35) is fixed to the head region of the T-shaped groove (18). The claw (30) can be hooked outside the cross bar (35). The width of the tail region of the T-shaped groove (18) is the same as the width of the claw (30).

6. The prefabricated power switch cabinet according to claim 1, characterized in that: Insertion pieces (14) are symmetrically fixed to one side of the side plate (1). A slot (15) matching the insertion pieces (14) is formed in the outer wall of the connection box (10). A cylindrical hole for the insertion rod (16) to pass through is formed in the interior of the insertion piece (14).

7. An assembled power switchgear according to claim 1, characterized in that: A locking plate (13) is fixed to the middle of the connecting rod (12). A locking mechanism for locking the locking plate (13) is arranged at the bottom of the upper frame body (6). The locking mechanism includes a limit frame (36). A limit hole (37) for the insertion of the locking plate (13) is formed in the middle of the limit frame (36). Fixing columns (39) penetrate through both sides of the limit frame (36). A limit disk (38) is fixed to the bottom of the fixing column (39). The top of the fixing column (39) is fixedly connected to the upper frame body (6). A second spring (17) is sleeved on the outside of the fixing column (39) between the limit frame (36) and the limit frame (36).

8. The prefabricated power switch cabinet according to claim 7, characterized in that: The bottom edge of the limit frame (36) and the top edge of the locking plate (13) are both in arc transition.

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