An assembled power switch cabinet

Abstract

The application discloses an assembled power switch cabinet, and particularly relates to the technical field of power switch cabinets, which comprises a cabinet frame, a cabinet door, a top plate, a back plate, a bottom plate and two side plates, the cabinet frame comprises 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, the bottom of the upper frame body and the top of the lower frame body are both welded with an insertion block, and the two ends of the vertical pipe are both provided with an insertion hole for the insertion block to be inserted, the insertion block on the upper frame body and the lower frame body is directly inserted into the four vertical pipes respectively, then the locking mechanism is used to complete the locking operation of the upper frame body, the lower frame body and the vertical pipe, and at the same time, the two vertical pipes can be further tightened, so that the assembly operation of the power switch cabinet is quickly completed, and the assembly of the whole power switch cabinet is more efficient due to the fact that bolts, rivets and welding operations are not needed in the assembly process of the cabinet frame.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power switch cabinet, in particular to an assembled power switch cabinet. BACKGROUND

[0002] The switch cabinet is a kind of electrical equipment, and the external line of the switch cabinet first enters the main control switch in the cabinet, then enters the branch control switch, each branch is set according to its needs, one or more low-voltage switch devices and related control, measurement, signal, protection, adjustment and other devices;

[0003] At present, in the assembly process of the power switch cabinet, the stand column and the cross beam are placed according to the position of the drawing, and are fixed by clamps or temporary bolts, full welding or fillet welding is used at the connection between the stand column and the cross beam, and the welded part needs to be polished flat, for the modular design cabinet body, i.e. the assembled cabinet body, the frame is divided into base, side plate, top plate and other modules, the base is assembled first, and then the side plate and the top plate are installed layer by layer, and the modules are fixed by bolts or buckles, but no matter what kind of way, the assembly process of the cabinet frame part of the existing power switch cabinet is still relatively complex, and the assembly efficiency is low. SUMMARY

[0004] The purpose of the present application is to provide an assembled power switch cabinet to solve the above problems in the art.

[0005] An assembled power switch cabinet, comprising a cabinet frame, a cabinet door, a top plate, a back plate, a bottom plate and two side plates, the cabinet frame comprises an upper frame body, a lower frame body and four stand pipes, the four stand pipes are distributed in a rectangular shape between the upper frame body and the lower frame body, the bottom of the upper frame body and the top of the lower frame body are both welded and fixed with an insertion block, and both ends of the stand pipe are provided with an insertion hole for the insertion of the insertion block.

[0006] Among them, the lock mechanism is arranged between the stand pipes on both sides of the cabinet frame, the lock mechanism is used for fixing the insertion block and the stand pipe, fixing the two side plates, and tensioning the two stand pipes.

[0007] Preferably, the cabinet door, the top plate, the back plate, the bottom plate and the two side plates are respectively installed on the front, top, back, bottom and left and right sides of the cabinet frame.

[0008] Preferably, the lock mechanism comprises two connecting boxes, the two connecting boxes are respectively located between the two stand pipes, the inside of the connecting box is penetrated by an insertion rod towards the stand pipe, the outer wall of the stand pipe is provided with a through hole for the insertion rod to pass through, and the outer wall of the insertion block is provided with a round hole for the insertion of the insertion rod.

[0009] The inside of the connecting box is provided with a pushing assembly for pushing the insertion rod towards the insertion block and a reset assembly for moving the insertion rod away from the insertion block.

[0010] Preferably, the pushing assembly comprises a connecting rod between the two connecting boxes, the ends of the connecting rod extend into the connecting boxes, the connecting rod is rotatably connected with the connecting boxes through bearings, the end of the connecting rod is fixed with an adjusting column, the adjusting column has an inclined end face relative to one end of the connecting rod, the inclined end face is provided with an annular cavity, the end of the connecting rod towards the adjusting column is fixed with a top rod, and the tail end of the top rod is provided with a first ball.

[0011] Preferably, the reset assembly comprises a limiting ring fixed outside the insertion rod and located inside the connecting box, and a first spring is sleeved outside the insertion rod between the limiting ring and the connecting box.

[0012] Preferably, the top of the inside of the connecting box is fixed with a rectangular guide rod, the outside of the rectangular guide rod is sleeved with a slidable connecting ring, and the connecting ring is connected with the limiting ring.

[0013] Preferably, the outer wall of the adjusting column is provided with an annular groove in an inclined manner, and the annular groove is parallel to the annular cavity.

[0014] The bottom of the inside of the connecting box is fixed with a sliding rail, a sliding block is slidably connected on the sliding rail, a second ball is mounted on the top of the sliding block, and part of the bead of the second ball is located in the annular groove. The bottom of the sliding block is fixed with a connecting plate, the inside of the sliding rail and the bottom of the connecting box are both provided with a rectangular hole for the movement of the connecting plate, and the bottom of the connecting plate is fixed with a hook.

[0015] One side of the riser below the connecting box is fixed with a supporting block, the top of the supporting block is provided with a T-shaped groove, the head region of the T-shaped groove is fixed with a horizontal rod, the hook can be hooked outside the horizontal rod, and the tail region of the T-shaped groove has the same width as the hook.

[0016] Preferably, one side of the side plate is symmetrically fixed with an insertion piece, the outer wall of the connecting box is provided with an insertion slot matched with the insertion piece, and the inside of the insertion piece is provided with a cylindrical hole for the insertion rod to pass through.

[0017] Preferably, a locking plate is fixed at the middle of the connecting rod, and the bottom of the upper frame body is provided with a locking mechanism for locking the locking plate.

[0018] The locking mechanism comprises a limiting frame, a limiting hole for inserting the locking plate is formed at the middle of the limiting frame, a fixing column penetrates through both sides of the limiting frame, a limiting disc is fixed at the bottom of the fixing column, the top of the fixing column is fixedly connected with the upper frame body, and a second spring is sleeved outside the fixing column between the limiting frame and the limiting frame.

[0019] Preferably, the bottom edge of the limiting frame and the top edge of the locking plate both have an arc-shaped transition.

[0020] The technical effects and advantages provided by the present invention in the above technical solution are as follows:

[0021] When assembling the "cabinet frame" of the power switchgear, this invention allows for the direct insertion of the inserts on the upper and lower frames into the corresponding four vertical pipes. Then, the locking mechanism can be used to lock the upper frame, lower frame, and vertical pipes. At the same time, it can further tighten the two vertical pipes, thereby quickly completing the assembly of the power switchgear. Since no bolts, rivets, or welding are required during the assembly of the "cabinet frame", the assembly of the entire power switchgear can be made more efficient.

[0022] Furthermore, the locking mechanism also adopts a modular design. Simply place the connecting box on the support block and then rotate the locking plate to complete the locking mechanism operation. Therefore, the entire assembly process is more convenient. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0024] Figure 1 This is an external view of the present invention;

[0025] Figure 2 This is an exploded view of the present invention;

[0026] Figure 3 This is a schematic diagram of the cabinet frame structure of the present invention;

[0027] Figure 4 This is a schematic diagram of the cabinet frame structure after the upper frame is separated according to the present invention;

[0028] Figure 5 This is an external view of the connecting rod of the present invention when connecting boxes are installed at both ends simultaneously;

[0029] Figure 6 This is a schematic diagram of the slot structure of the present invention;

[0030] Figure 7 This is one of the schematic diagrams of the internal structure of the connector box of the present invention;

[0031] Figure 8 This is the second schematic diagram of the internal structure of the present invention;

[0032] Figure 9 This is a schematic diagram of the slide rail structure of the present invention;

[0033] Figure 10 It is a structural schematic view of the support block of the application;

[0034] Figure 11 It is a structural schematic view of the locking plate entering the limiting frame;

[0035] Figure 12 It is a structural schematic view of the limiting frame;

[0036] Figure 13 It is a structural schematic view of the insert piece.

[0037] Mark explanation:

[0038] 1, side plate; 2, cabinet door; 3, top plate; 4, back plate; 5, bottom plate; 6, upper frame body; 7, vertical pipe; 8, insert block; 9, lower frame body; 10, connecting box; 11, support block; 12, connecting rod; 13, locking plate; 14, insert piece; 15, insert slot; 16, insert rod; 17, second spring; 18, T-shaped groove; 19, limiting ring; 20, first spring; 21, connecting ring; 22, rectangular guide rod; 23, top rod; 24, first ball; 25, adjusting column; 26, annular groove; 27, second ball; 28, sliding block; 29, sliding rail; 30, hook; 31, annular cavity; 32, connecting plate; 33, insert hole; 34, through hole; 35, cross rod; 36, limiting frame; 37, limiting hole; 38, limiting disc; 39, fixed column. DETAILED DESCRIPTION

[0039] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below in conjunction with the drawings.

[0040] The present application provides an assembled power switch cabinet as shown in Figures 1-13 The cabinet frame includes an upper frame body 6, a lower frame body 9, and four vertical pipes 7, the upper frame body 6 and the lower frame body 9 are welded by four square tubes, the four vertical pipes 7 are distributed in a rectangular shape between the upper frame body 6 and the lower frame body 9, the bottom of the upper frame body 6 and the top of the lower frame body 9 are both welded and fixed with an insert block 8, and the two ends of the vertical pipe 7 are both provided with an insert hole 33 for the insertion of the insert block 8.

[0041] Among them, the locking mechanism is arranged between the vertical pipes 7 on both sides of the cabinet frame, the locking mechanism is used for fixing the insert block 8 with the vertical pipe 7, fixing the two side plates 1, and tensioning the two vertical pipes 7.

[0042] Further, 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, and the installation mode of the cabinet door 2, the top plate 3, the back plate 4 and the bottom plate 5 with the cabinet frame is a conventional technology, which can be welded, bolted, riveted or connected in other modes, and details are not described herein.

[0043] With reference to Figures 3-10 The locking mechanism comprises two connecting boxes 10, the two connecting boxes 10 are respectively located between the two vertical pipes 7, the inside of the connecting box 10 is penetrated by a plug rod 16 towards the side of the vertical pipe 7, the outer wall of the vertical pipe 7 is provided with a through hole 34 for the plug rod 16 to pass through, and the outer wall of the plug block 8 is provided with a circular hole for the plug rod 16 to insert into.

[0044] The inside of the connecting box 10 is provided with a pushing assembly for pushing the plug rod 16 towards the plug block 8 and a reset assembly for moving the plug rod 16 away from the plug block 8.

[0045] With reference to Figures 3-8 The pushing assembly comprises a connecting rod 12, the connecting rod 12 is located between the two connecting boxes 10, the end of the connecting rod 12 extends into the inside of the connecting box 10, the connecting rod 12 is rotationally connected with the connecting box 10 through a bearing, the end of the connecting rod 12 is fixedly provided with an adjusting column 25, the adjusting column 25 is provided with an inclined end surface relative to one end of the connecting rod 12, the inclined end surface is provided with an annular cavity 31, the end of the connecting rod 12 towards the adjusting column 25 is fixedly provided with a top rod 23, the distal end of the top rod 23 is provided with a first ball 24, and part of the ball body of the first ball 24 is located in the annular cavity 31.

[0046] Further, the reset assembly comprises a limiting ring 19, the limiting ring 19 is fixed to the outside of the plug rod 16 and located in the inside of the connecting box 10, a first spring 20 is sleeved on the outside of the plug rod 16 between the limiting ring 19 and the connecting box 10, the first spring 20 and the limiting ring 19 can ensure that the plug rod 16 has a movement trend towards the adjusting column 25 in real time, so that the first ball 24 can be in contact with the annular cavity 31 stably in real time.

[0047] Further, the inside of the connecting box 10 is fixedly provided with a rectangular guide rod 22 at the top, the outside of the rectangular guide rod 22 is sleeved with a slidable connecting ring 21, the connecting ring 21 is connected with the limiting ring 19, and the connecting ring 21 and the rectangular guide rod 22 can further improve the stability of the plug rod 16 during movement.

[0048] With reference to Figures 3-12The outer wall of the adjusting column 25 is obliquely provided with an annular groove 26, which is parallel to the annular cavity 31, so that the hook claw 30 can simultaneously hook the horizontal rod 35 when the subsequent insertion rod 16 enters the insertion block 8, thereby improving the structural strength of the entire cabinet frame after assembly.

[0049] The inner bottom of the connecting box 10 is fixedly provided with a sliding rail 29, the sliding rail 29 is slidably connected with a sliding block 28, the top of the sliding block 28 is provided with a second ball 27, part of the ball body of the second ball 27 is located in the annular groove 26, the bottom of the sliding block 28 is fixedly provided with a connecting plate 32, the inner bottom of the sliding rail 29 and the bottom of the connecting box 10 are both provided with a rectangular hole for the movement of the connecting plate 32, and the bottom of the connecting plate 32 is fixedly provided with a hook claw 30.

[0050] The side of the vertical pipe 7 is fixedly provided with a supporting block 11 below the connecting box 10, the top of the supporting block 11 is provided with a T-shaped groove 18, the head region of the T-shaped groove 18 is fixedly provided with a horizontal rod 35, the hook claw 30 can be hooked outside the horizontal rod 35, the tail region of the T-shaped groove 18 has the same width as the width of the hook claw 30, after the connecting box 10 is placed on the top of the supporting block 11, the hook claw 30 will enter the tail region of the T-shaped groove on the top of the supporting block 11, which can prevent the connecting box 10 from shaking and improve the stability of the connecting box 10, during the working process of the locking mechanism, the connecting plate 32 will drive the hook claw 30 to move inside the T-shaped groove 18 until the hook claw 30 hooks the horizontal rod 35 inside the T-shaped groove 18 to tighten the two vertical pipes 7, thereby further improving the structural strength and stability of the entire power switch cabinet after assembly.

[0051] Further, one side of the side plate 1 is symmetrically fixedly provided with an insertion piece 14, the outer wall of the connecting box 10 is provided with an insertion groove 15 matched with the insertion piece 14, and the inner portion of the insertion piece 14 is provided with a cylindrical hole for the insertion of the insertion rod 16, so that the side plate 1 can also be locked and fixed at the same time when the locking mechanism locks the cabinet frame, thereby further saving the installation process of the side plate 1.

[0052] Further, the connecting rod 12 is fixedly provided with a locking plate 13 at the middle portion, and the bottom of the upper frame body 6 is provided with a locking mechanism for locking the locking plate 13.

[0053] The locking mechanism comprises a limiting frame 36, the middle portion of the limiting frame 36 is provided with a limiting hole 37 for the insertion of the locking plate 13, both sides of the limiting frame 36 are penetrated by a fixed column 39, the bottom of the fixed column 39 is fixedly provided with a limiting disc 38, the top of the fixed column 39 is fixedly connected with the upper frame body 6, and the outer portion of the fixed column 39 is sleeved with a second spring 17 between the limiting frame 36 and the limiting frame 36, and after the locking plate 13 is inserted into the limiting hole 37 in the limiting frame 36, the locking plate 13 can be limited, thereby preventing the locking plate 13 from loosening.

[0054] Further, the bottom edge of the limiting frame 36 and the top edge of the locking plate 13 are both arc-shaped transitions, so that the locking plate 13 can rotate into the limiting frame 36 along the arc-shaped transition edge when in contact with the limiting frame 36.

[0055] The overall working principle is as follows:

[0056] When assembling the "cabinet frame", first place the lower frame 9 horizontally on the ground, then place the "lower" locking assembly on the top of the lower frame 9, then 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, then insert the insertion blocks 8 of the upper frame 6 into the four vertical pipes 7 respectively, thereby quickly assembling the "cabinet frame", and then installing the cabinet door 2, top plate 3, back plate 4, bottom plate 5 and two side plates 1. Since no bolts, rivets and welding operations are required during the assembly of the "cabinet frame", the assembly of the entire power switchgear is more efficient.

[0057] When installing the locking mechanism, the "upper" locking mechanism is described as follows:

[0058] Two connecting boxes 10 can be placed on the top of the two support blocks 11 at this time, and the locking plate 13 needs to be directed downward (this purpose is to ensure that the insertion rod 16 can be retracted into the interior of the connecting box 10 under the action of the reset assembly, so as to avoid the insertion rod 16 hindering the connecting box 10 from entering between the two vertical pipes 7), after the connecting box 10 is placed on the top of the support block 11, the hook 30 will enter the tail of the T-shaped slot on the top of the support block 11, thereby preventing the connecting box 10 from shaking and improving the stability of the connecting box 10;

[0059] At the same time, the insertion piece 14 on the side plate 1 is inserted into the insertion slot 15 (in the subsequent locking of the "cabinet frame" by the locking mechanism, the side plate 1 can also be locked and fixed at the same time, further saving the installation process of the side plate 1, if the environment of the power switchgear requires sealing, sealing glue or adhesive tape can be injected between the "cabinet door 2, top plate 3, back plate 4, bottom plate 5 and two side plates 1" and the "cabinet frame", which is a conventional technology, if the power switchgear requires better sealing, the traditional shell assembly method can also be used, the side plate 1 assembly method of the present case is only used for power switchgears with low sealing requirements);

[0060] After the connecting box 10 is installed, the locking plate 13 is turned up by 180°, and the locking plate 13 is turned up by 180°, which will also drive the adjusting column 25 to rotate synchronously. In the process of rotating the adjusting column 25, the first rolling 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 rolling ball 24, the top rod 23 and the plug rod 16 will be "pushed" to the outside of the connecting box 10, so the plug rod 16 will pass through the cylindrical hole of the plug piece 14, the through hole 34 of the stand pipe 7 and finally enter the round hole inside the plug block 8, thereby realizing the fixation of the side plate 1 and the locking of the stand pipe 7 and the upper frame body 6. Similarly, the locking process of the stand pipe 7 and the lower frame body 9 is also the same.

[0061] At the same time, in the process of rotating the adjusting column 25, the second rolling ball 27 will roll in the annular groove 26 outside the adjusting column 25. Since the annular groove 26 is also inclined on the outside of the adjusting column 25, it will drive the second rolling ball 27 and the sliding block 28 to move as a whole along the sliding rail 29 away from the stand pipe 7. In the process of moving the sliding block 28, the connecting plate 32 will drive the hook claw 30 to move inside the T-shaped groove 18 until the hook claw 30 "hooks" the horizontal rod 35 inside the T-shaped groove 18 to tighten the two stand pipes 7, further improving the structural strength and stability of the entire power switch cabinet after assembly ("cabinet frame" after assembly, the state inside the connecting box 10 can be referred to Figure 7 and Figure 8 );

[0062] Before the locking plate 13 is about to be turned by 180°, the limiting frame 36 can be moved upward. When the locking plate 13 is turned by 180°, the limiting frame 36 is released, and under the action of the second spring 17, the limiting frame 36 is reset, so that the locking plate 13 is inserted into the limiting hole 37 inside the limiting frame 36 to limit the locking plate 13, preventing the locking plate 13 from loosening and affecting the firmness of the "cabinet frame";

[0063] At this point, the entire "cabinet frame" of the power switch cabinet is assembled, and then the cabinet door 2, the top plate 3, the back plate 4 and the bottom plate 5 are assembled according to the conventional technology, and finally the power switch cabinet is assembled;

[0064] In summary, after the cabinet frame of the power switch cabinet is built, a modular locking mechanism is used. Only the connecting box 10 in the locking mechanism is placed on the supporting block 11 and then the locking plate 13 is turned to complete the locking mechanism operation, so that the entire assembly process of the power switch cabinet is more convenient.

[0065] The foregoing merely illustrates some exemplary embodiments of the application, and no doubt numerous modifications and alterations thereto will be apparent to those skilled in the art. Accordingly, the above description is intended for purposes of illustration only and should not be construed as limiting the scope of the application.

Claims

1. A prefabricated power switchgear, comprising a cabinet frame, cabinet doors (2), a top plate (3), a back plate (4), a bottom plate (5), and two side plates (1), characterized in that: The cabinet frame includes an upper frame (6), a lower frame (9), and four vertical tubes (7). The four vertical tubes (7) are rectangularly distributed between the upper frame (6) and the lower frame (9). Insert blocks (8) are welded and fixed to 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 tubes (7). Among them, a locking mechanism is provided between the uprights (7) on both sides of the cabinet frame. The locking mechanism is used to fix the plug (8) to the upright (7), to fix the two side plates (1), and to tighten the two uprights (7). The locking mechanism includes two connecting boxes (10), which are located between two risers (7). A rod (16) is inserted through the inside of the connecting box (10) facing the riser (7). A through hole (34) is provided on the outer wall of the riser (7) for the rod (16) to pass through. A round hole is provided on the outer wall of the insert block (8) for the rod (16) to be inserted. The connection box (10) is provided with a pushing component for pushing the plug (16) toward the plug block (8) and a resetting component for moving the plug (16) away from the plug block (8); The pushing assembly includes a connecting rod (12) located between two connecting boxes (10). The end of the connecting rod (12) extends into the interior of the connecting box (10). The connecting rod (12) and the connecting box (10) are rotatably connected by a bearing. An adjusting column (25) is fixed to the end of the connecting rod (12). The adjusting column (25) has an inclined end face relative to one end of the connecting rod (12). An annular cavity (31) is opened on the inclined end face. A top rod (23) is fixed to one 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 of the first ball (24) is located in the annular cavity (31).

2. The prefabricated power switchgear according to claim 1, characterized in that: The cabinet door (2), top panel (3), back panel (4), bottom panel (5) and two side panels (1) are respectively installed on the front, top, back, bottom and left and right sides of the cabinet frame.

3. The prefabricated power switchgear according to claim 1, characterized in that: The reset assembly includes a limiting ring (19), which is fixed to the outside of the plug rod (16) and located inside the connecting box (10). A first spring (20) is sleeved on the outside of the plug rod (16) and located between the limiting ring (19) and the connecting box (10).

4. A prefabricated power switchgear according to claim 3, characterized in that: A rectangular guide rod (22) is fixed to the top of the inside of the connecting box (10), and a sliding 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).

5. A prefabricated power switchgear according to claim 1, characterized in that: The outer wall of the adjusting column (25) is inclined and has an annular groove (26), which is parallel to the annular cavity (31); The bottom of the connecting box (10) is fixed with a slide rail (29), and a slider (28) is slidably connected on the slide rail (29). A second ball bearing (27) is installed on the top of the slider (28), and part of the ball bearing (27) is located in the annular groove (26). A connecting plate (32) is fixed at the bottom of the slider (28). A rectangular hole for the movement of the connecting plate (32) is opened in the interior of the slide rail (29) and the bottom of the connecting box (10). A hook (30) is fixed at the bottom of the connecting plate (32). A support block (11) is fixed on one side of the riser (7) below the connecting box (10). A T-slot (18) is provided on the top of the support block (11). A crossbar (35) is fixed in the head area of ​​the T-slot (18). The hook (30) can hook onto the outside of the crossbar (35). The width of the tail area of ​​the T-slot (18) is the same as the width of the hook (30).

6. A prefabricated power switchgear according to claim 1, characterized in that: A insert (14) is symmetrically fixed on one side of the side plate (1), and a slot (15) matching the insert (14) is opened on the outer wall of the connecting box (10). A cylindrical hole for the insertion rod (16) to pass through is opened inside the insert (14).

7. A prefabricated power switchgear according to claim 1, characterized in that: A locking plate (13) is fixed in the middle of the connecting rod (12), and a locking mechanism for locking the locking plate (13) is provided at the bottom of the upper frame (6). The locking mechanism includes a limiting frame (36), a limiting hole (37) for inserting a locking plate (13) is provided in the middle of the limiting frame (36), and a fixing post (39) is provided on both sides of the limiting frame (36). A limiting plate (38) is fixed at the bottom of the fixing post (39), the top of the fixing post (39) is fixedly connected to the upper frame (6), and a second spring (17) is sleeved on the outside of the fixing post (39) between the limiting frame (36) and the limiting frame (36).

8. A prefabricated power switchgear according to claim 7, characterized in that: The bottom edge of the limiting frame (36) and the top edge of the locking plate (13) are both arc-shaped transitions.

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