A modular low-voltage JP cabinet that can be flexibly expanded

Abstract

The present invention relates to the technical field of low-voltage JP cabinets, and discloses a modular low-voltage JP cabinet capable of flexible expansion, including a low-voltage cabinet body. An installation backboard is installed inside the low-voltage cabinet body. An electrical connection sliding frame is fixedly connected to the outer surface of the installation backboard. Two air switch switches are slidably installed on the outer surface of the electrical connection sliding frame. An unfolding wrench is rotatably installed on one side of the air switch switch. An unfolding protection component is fixedly connected to the outer surface of the air switch switch. The unfolding protection component includes a plurality of limiting sliding plates fixedly connected to the outer surface of the air switch switch. When it is beneficial to the low-voltage JP cabinet, when there is a problem with the low-voltage line, the line of the air switch can be automatically separated, avoiding the failure of the protection function of the JP cabinet caused by forced connection, and the low-voltage cabinet body can be flexibly expanded according to the actual use situation of the JP cabinet, improving the modular application in use and ensuring the use efficiency of the low-voltage cabinet.

Description

Technical Field

[0001] The present invention relates to the technical field of low-voltage JP cabinets, and more specifically, to a modular low-voltage JP cabinet that can be flexibly expanded. Background Art

[0002] ‌The low-voltage JP cabinet‌, fully known as the JP type low-voltage distribution reactive power compensation integrated cabinet, is a new type of outdoor distribution reactive power compensation integrated cabinet, designed under the principles of ensuring safety, economy, reasonableness, and reliability. It is applicable to distribution systems with an alternating current of 50 Hz and a rated voltage of 380 V in urban power grids, rural power grid renovations, industrial and mining enterprises, street lighting, residential communities, etc., and has multiple functions such as power distribution, control, protection, reactive power compensation, and power metering.

[0003] Currently, the existing modular low-voltage JP cabinets that can be flexibly expanded have the following deficiencies in use: The existing modular low-voltage JP cabinets that can be flexibly expanded are generally of a fixed design and installed in a predetermined position. When a ground fault or short circuit occurs in the low-voltage line, the JP cabinet will activate the protection mechanism to trip and cut off the power. Sometimes, because some people are not clear about the root cause of the problem and are eager to use it, they will privately open the door of the JP cabinet and try to close the air switch to send power on their own, and forcibly connect the upper and lower parts of the air switch with a wire. This will cause the JP cabinet to lose its protection function and operate under the fault current for a long time, and may eventually overload and burn out. When there are many installed terminals, it cannot meet the needs, and additional cabinets need to be added to solve the problem, but the added cabinets are not fully utilized, resulting in waste of costs and other problems.

[0004] The existing modular low-voltage JP cabinets that can be flexibly expanded have the above problems. In view of this, we propose a modular low-voltage JP cabinet that can be flexibly expanded. Summary of the Invention

[0005] The purpose of the present invention is to provide a modular low-voltage JP cabinet that can be flexibly expanded to overcome the above-mentioned defects in the prior art.

[0006] In view of the deficiencies of the prior art, the present invention provides a modular low-voltage JP cabinet that can be flexibly expanded, and solves the problems that: The existing modular low-voltage JP cabinets that can be flexibly expanded are generally of a fixed design and installed in a predetermined position. When a ground fault or short circuit occurs in the low-voltage line, the JP cabinet will activate the protection mechanism to trip and cut off the power. Sometimes, because some people are not clear about the root cause of the problem and are eager to use it, they will privately open the door of the JP cabinet and try to close the air switch to send power on their own, and forcibly connect the upper and lower parts of the air switch with a wire. This will cause the JP cabinet to lose its protection function and operate under the fault current for a long time, and may eventually overload and burn out. When there are many installed terminals, it cannot meet the needs, and additional cabinets need to be added to solve the problem, but the added cabinets are not fully utilized, resulting in waste of costs and other problems;

[0007] To achieve the above object, the present invention is implemented through the following technical solutions:

[0008] The technical solution adopted by the present invention to solve its technical problems is: a modular low-voltage JP cabinet capable of flexible expansion, including a low-voltage cabinet body, an installation backboard is installed inside the low-voltage cabinet body, an electrical connection sliding frame is fixedly connected to the outer surface of the installation backboard, two air switch switches are slidably installed on the outer surface of the electrical connection sliding frame, an unfolding wrench is rotatably installed on one side of the air switch switch, an unfolding protection component is fixedly connected to the outer surface of the air switch switch, the unfolding protection component includes a plurality of limiting sliding plates fixedly connected to the outer surface of the air switch switch, a linkage bridge is slidably arranged on the upper surfaces of the plurality of limiting sliding plates on both sides, a rotating seat is rotatably connected to the upper surfaces of the two linkage bridges, a swinging plate is fixedly connected to the upper end of the rotating seat, limiting strip blocks are fixedly connected to both sides of the swinging plate, a follower frame plate matching the limiting strip blocks is slidably arranged on the outer surface of the swinging plate, a pulling and disconnecting component is fixedly connected to the upper end of the follower frame plate, the pulling and disconnecting component includes a cross plate fixedly connected to the upper end of the follower frame plate, a plurality of openings are formed on the upper surface of the cross plate, two clamping pieces are rotatably connected to the inner sides of the plurality of openings, a clamping plate is fixedly connected to one side of each two clamping pieces, a bottom plate is fixedly connected to the bottom end of each plurality of clamping pieces, two limiting openings are formed in the middle of each two bottom plates, a limiting rod is horizontally inserted between each two limiting openings on both sides, a spring is sleeved on the limiting rod between the two bottom plates, an expansion adjustment component is arranged inside the low-voltage cabinet body, a linkage engagement component is fixedly connected to the inner wall of the low-voltage cabinet body, a driving control component is fixedly installed on the inner wall of the low-voltage cabinet body, and an unfolding door is rotatably installed on one side of the low-voltage cabinet body.

[0009] Preferably, a clamping rod is fixedly connected to the bottom end of one side of the swinging plate, a groove corresponding to the clamping rod is formed on one side of the linkage bridge, and a reset elastic piece is fixedly connected to the bottom end of the other side of the swinging plate.

[0010] Preferably, the expansion adjustment component includes a telescopic groove formed on the outer wall of the low-voltage cabinet, an expansion frame slidably connected to the telescopic groove is arranged on one side of the low-voltage cabinet body, a positioning frame is arranged on one side of the low-voltage cabinet body, a plurality of limiting pieces are fixedly connected to one side wall of the expansion frame, and a plurality of rollers are rotatably installed between the plurality of limiting pieces.

[0011] Preferably, the linkage engagement component includes two limiting slide rails fixedly connected to one side wall of the installation backboard, a first toothed plate and a first strip plate are respectively slidably arranged inside the two limiting slide rails, and a linkage folding plate is rotatably connected to the bottom end of the first toothed plate.

[0012] Preferably, one side of the plurality of limiting pieces is fixedly connected to an installation plate together, one side of the installation plate is fixedly connected to a top plate, and an arc-shaped groove is formed in the upper end of the top plate.

[0013] Preferably, the driving and controlling assembly includes a micro motor fixedly installed on one side wall of the installation back plate. A rotating shaft is vertically inserted and installed on one side of the installation back plate. Fixed sleeves are respectively fixedly sleeved on the outer surfaces of the two rotating shafts. The rotating shafts are respectively used in cooperation with a first toothed plate and a first strip plate.

[0014] Preferably, a first pulley and a second pulley connected by a belt are respectively fixedly sleeved on the outer surfaces of the two rotating shafts. The lower rotating shaft is fixedly connected to the output shaft of the micro motor.

[0015] Preferably, a plurality of heat dissipation fans are horizontally installed at the lower part of the installation back plate.

[0016] Preferably, a transfer block is fixedly connected to the upper end of one side of the two swing plates. A first limiting pressure rod is movably connected inside the transfer block. The first limiting pressure rod corresponds to the unfolding wrench.

[0017] Preferably, a second limiting pressure rod and a third limiting pressure rod are respectively rotatably connected to the opposite sides of the two transfer blocks. A through hole is formed in the middle of the second limiting pressure rod. The third limiting pressure rod is inserted through the through hole.

[0018] Advantages of the present invention:

[0019] 1. In a modular low-voltage JP cabinet capable of flexible expansion according to the present invention, after the micro motor operates, the output shaft drives the rotating shaft to rotate, thereby driving the top plate to rotate. When the micro motor operates, it can also drive the second pulley to rotate, so that the first pulley is driven to rotate through the belt, thereby driving the top plate and the rotating shaft to rotate simultaneously. When the top plate and the rotating shaft rotate, they can drive the first toothed plate to move downward. After the first toothed plate moves, it drives the linkage folding plate to move, so as to slide inside the first toothed plate and push the top plate to move, thereby driving the installation plate to move. After the installation plate moves, it drives a plurality of limiting pieces to move, and further enables the rollers to roll inside the low-voltage cabinet body. After the limiting pieces move, they drive the expansion frame to move, so that the expansion frame slides inside the telescopic groove, thereby increasing the expansion effect of the voltage cabinet, being beneficial to flexibly expanding the low-voltage cabinet body according to the actual use situation of the JP cabinet, improving the modular application in use, and ensuring the use efficiency of the low-voltage cabinet.

[0020] 2. In a modular low-voltage JP cabinet capable of flexible expansion according to the present invention, by turning a wrench, the first limiting rod and the third limiting rod are driven to move. After the first limiting rod moves, it drives the adapter block to move, and then drives the swing plate to move. The rotating seat rotates on the linkage bridge. During the rotation, the clamping rod is lifted and the reset elastic piece is compressed, so that the follower frame plate slides outside the limiting strip. During the sliding process, the cross plate is driven to move, and the clamping piece is driven to move under the movement of the cross plate, so that the clamping plate pulls out the wiring. Before wiring, the wire head is passed through the clamping piece and abuts against the clamping plate, and then the bottom plate is driven to compress the spring, which is beneficial to adjusting according to the use situation of the low-voltage cabinet during use. When there is an emergency, the externally connected wire inserted can be pulled out in time to ensure its safety. When the wrench is closed and lowered, the second limiting rod and the third limiting rod can be driven to move, so that the third limiting rod moves in the through hole, thereby pushing the adapter block to slide to both sides. During the sliding process, the linkage bridge is driven to move, so that the two upper air switch switches are separated, preventing the internal components from affecting each other after a fire and ensuring its safety. When the low-voltage JP cabinet is beneficial, when there is a problem with the low-voltage line, the lines of the air switches can be automatically separated, avoiding the failure of the protection function of the JP cabinet caused by forced connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0022] The present invention will be further described below in conjunction with the drawings and embodiments.

[0023] Figure 1 is the overall structural schematic diagram of the present invention;

[0024] Figure 2 is the Figure 1 cross-sectional structural schematic diagram of the medium and low-voltage cabinet body of the present invention;

[0025] Figure 3 is the Figure 2 structural schematic diagram of multiple components of the present invention;

[0026] Figure 4 is the Figure 3 structural schematic diagram of the deployed protection component and the linkage engagement component of the present invention;

[0027] Figure 5 is the Figure 4 structural schematic diagram of the A part of the present invention;

[0028] Figure 6 is theFigure 4 Schematic enlarged view of the structure at B in the [device];

[0029] Figure 7 It is of the present invention Figure 1 Front view structure schematic diagram of the [device];

[0030] Figure 8 It is of the present invention Figure 1 Top view structure schematic diagram of the [device].

[0031] In the figure: 1, low - voltage cabinet body; 2, expansion frame; 3, telescopic groove; 4, positioning frame; 551, pull - out disconnection component; 552, expansion protection component; 553, expansion adjustment component; 554, linkage engagement component; 555, drive control component; 6, installation backplane; 7, micro - motor; 8, expansion door; 9, air switch; 10, cooling fan; 11, roller; 12, limit piece; 14, expansion wrench; 15, first limiting pressure rod; 16, limit slide plate; 17, second limiting pressure rod; 18, linkage folding plate; 19, mounting plate; 20, first toothed plate 20; 21, top plate; 22, first strip plate; 23, rotating shaft; 24, limit slide rail; 25, electrical connection slide frame; 26, third limiting pressure rod; 27, linkage bridge; 28, through - hole; 29, first pulley; 30, second pulley; 31, arc groove; 32, clamping piece; 33, clamping plate; 34, opening; 35, bottom plate; 36, limit port; 37, limit rod; 38, spring; 39, cross - plate; 40, swing plate; 41, limiting strip; 42, adapter block; 43, rotating seat; 44, follower frame plate; 45, clamping rod; 46, reset elastic piece. Detailed implementation manners

[0032] In the embodiments of the present invention, by providing a modular low - voltage JP cabinet that can be flexibly expanded, the following problems are solved: Existing modular low - voltage JP cabinets that can be flexibly expanded are generally fixedly designed and installed at a predetermined position. When a ground fault or short - circuit occurs in the low - voltage line, the JP cabinet will start a protection mechanism to trip and cut off the power. However, sometimes there are people who, because they don't understand the root cause of the problem and are eager to use it, privately open the door of the JP cabinet and try to close the air switch and send power on their own, and forcibly connect the upper and lower parts of the air switch with wires. This will cause the JP cabinet to lose its protection function and operate under fault current for a long time, and may eventually overload and burn out. When there are many installed terminals, it cannot meet the needs, and additional cabinet bodies need to be added to solve the problem, but the added cabinet bodies are not fully utilized, resulting in waste of costs, etc.;

[0033] To better understand the above - mentioned technical solution, the following will explain the above - mentioned technical solution in detail in combination with the specification drawings and specific implementation manners.

[0034] A modular low-voltage JP cabinet capable of flexible expansion in combination with Figures 1-8 includes a low-voltage cabinet body 1. An installation backplane 6 is installed inside the low-voltage cabinet body 1. An electrical connection sliding frame 25 is fixedly connected to the outer surface of the installation backplane 6. Two air switch switches 9 are slidably installed on the outer surface of the electrical connection sliding frame 25. An unfolding wrench 14 is rotatably installed on one side of the air switch switch 9. An unfolding protection component 552 is fixedly connected to the outer surface of the air switch switch 9. The unfolding protection component 552 includes a plurality of limiting sliding plates 16 fixedly connected to the outer surface of the air switch switch 9. A linkage bridge 27 is slidably arranged on the upper surfaces of the plurality of limiting sliding plates 16 on both sides. A rotating seat 43 is rotatably connected to the upper surfaces of the two linkage bridges 27. A swinging plate 40 is fixedly connected to the upper end of the rotating seat 43. Limiting strip blocks 41 are fixedly connected to both sides of the swinging plate 40. A follower frame plate 44 matching the limiting strip blocks 41 is slidably arranged on the outer surface of the swinging plate 40. An extraction disconnection component 551 is fixedly connected to the upper end of the follower frame plate 44. The extraction disconnection component 551 includes a cross plate 39 fixedly connected to the upper end of the follower frame plate 44. A plurality of openings 34 are formed on the upper surface of the cross plate 39. Two clamping pieces 32 are rotatably connected to the inner sides of the plurality of openings 34. A clamping plate 33 is fixedly connected to one side of each two clamping pieces 32. The bottom ends of the plurality of clamping pieces 32 are fixedly connected to a bottom plate 35. Two limiting openings 36 are formed in the middle of each two bottom plates 35. A limiting rod 37 is horizontally inserted between each two limiting openings 36 on both sides. A spring 38 is sleeved on the limiting rod 37 between the two bottom plates 35. An expansion adjustment component 553 is arranged inside the low-voltage cabinet body 1. A linkage engagement component 554 is fixedly connected to the inner wall of the low-voltage cabinet body 1. A driving control component 555 is fixedly installed on the inner wall of the low-voltage cabinet body 1. An unfolding door 8 is rotatably installed on one side of the low-voltage cabinet body 1. A clamping rod 45 is fixedly connected to the bottom end of one side of the swinging plate 40. A groove corresponding to the clamping rod 45 is formed on one side of the linkage bridge 27. A reset elastic piece 46 is fixedly connected to the bottom end of the other side of the swinging plate 40. An adapter block 42 is fixedly connected to the upper end of one side of the two swinging plates 40. A first limiting pressure rod 15 is movably connected to the inside of the adapter block 42. The first limiting pressure rod 15 corresponds to the unfolding wrench 14. A second limiting pressure rod 17 and a third limiting pressure rod 26 are respectively rotatably connected to the corresponding sides of the two adapter blocks 42. A through hole 28 is formed in the middle of the second limiting pressure rod 17. The third limiting pressure rod 26 is inserted through the through hole 28.

[0035] For the above technical solution, when the low-voltage cabinet is in use, with the tripping of the air switch, it can drive the expansion wrench 14 to rotate, thereby driving the first limiting rod 15 and the third limiting rod 26 to move. After the first limiting rod 15 moves, it drives the adapter block 42 to move, and drives the swing plate 40 to move. Then the rotating seat 43 rotates on the linkage bridge 27. During the rotation, the clamping rod 45 is lifted and the reset elastic piece 46 is compressed, so that the follower frame plate 44 slides outside the limiting strip 41. During the sliding process, it drives the cross plate 39 to move. Under the movement of the cross plate 39, it drives the clamping piece 32 to move, so that the clamping plate 33 pulls out the wiring. Before wiring, the wire head is passed through the clamping piece 32 and abuts against the clamping plate 33, and then drives the bottom plate 35 to compress the spring 38. This is beneficial for adjustment according to the usage situation of the low-voltage cabinet during use. When there is an emergency, the externally connected wire inserted can be pulled out in time to ensure its safety. When the expansion wrench 14 is closed and lowered, it can drive the second limiting rod 17 and the third limiting rod 26 to move, so that the third limiting rod 26 moves in the through hole 28, thereby pushing the adapter block 42 to slide to both sides. During the sliding process, it drives the linkage bridge 27 to move, thereby driving the two upper air switch switches 9 to separate, preventing the internal components from affecting each other after a fire and ensuring its safety. It is beneficial to automatically separate the air switch lines when there are problems in the low-voltage line, and avoid the protection function of the JP cabinet from failing due to forced connection.

[0036] A further technical solution, the expansion adjustment component 553 includes a telescopic groove 3 opened on the outer wall of the low-voltage cabinet body 1. One side of the low-voltage cabinet body 1 is provided with an expansion frame 2 slidably connected to the telescopic groove 3. One side of the low-voltage cabinet body 1 is provided with a positioning frame 4. One side wall of the expansion frame 2 is fixedly connected with a plurality of limiting pieces 12. A plurality of rollers 11 are rotatably installed between the plurality of limiting pieces 12. The linkage engagement component 554 includes two limiting slide rails 24 fixedly connected to one side wall of the installation back plate 6. The inner sides of the two limiting slide rails 24 are respectively slidably provided with a first toothed plate 20 and a first strip plate 22. The bottom end of the first toothed plate 20 is rotatably connected with a linkage folding plate 18. One side of the plurality of limiting pieces 12 is commonly fixedly connected with a mounting plate 19. One side of the mounting plate 19 is fixedly connected with a top plate 21. An arc groove 31 is opened at the upper end of the top plate 21. The driving control component 555 includes a micro motor 7 fixedly installed on one side wall of the installation back plate 6. A rotating shaft 23 is vertically inserted and installed on one side of the installation back plate 6. The outer surfaces of the two rotating shafts 23 are fixedly sleeved with the rotating shafts 23. The rotating shafts 23 are respectively used in cooperation with the first toothed plate 20 and the first strip plate 22. The outer surfaces of the two rotating shafts 23 are respectively fixedly sleeved with a first pulley 29 and a second pulley 30 connected by a belt. The lower rotating shaft 23 is fixedly connected with the output shaft of the micro motor 7. A plurality of heat dissipation fans 10 are horizontally installed at the lower part of the installation back plate 6.

[0037] For the above technical solution, when the device is in use, the switch of the micro-motor 7 can be turned on from an external controller. After the micro-motor 7 operates, the output shaft drives the rotating shaft 23 to rotate, thereby driving the top plate 21 to rotate. When the micro-motor 7 operates, it can also drive the second pulley 30 to rotate, so that the first pulley 29 is driven to rotate through the belt, thereby driving the top plate 21 and the rotating shaft 23 to rotate simultaneously. When the top plate 21 and the rotating shaft 23 rotate, they can drive the first toothed plate 20 to move downward. After the first toothed plate 20 moves, it drives the linkage folding plate 18 to move, so as to slide within the first toothed plate 20 and push the top plate 21 to move, thereby driving the mounting plate 19 to move. After the mounting plate 19 moves, it drives a plurality of limiting pieces 12 to move, and then the rollers 11 roll inside the low-voltage cabinet body 1. After the limiting pieces 12 move, they drive the expansion frame 2 to move, so that the expansion frame 2 slides inside the telescopic groove 3. When the first strip 22 slides to the maximum position of the limit slide rail 24, the micro-motor 7 stops operating, thereby increasing the expansion effect of the voltage cabinet, being beneficial to flexibly expanding the low-voltage cabinet body according to the actual use situation of the JP cabinet, improving the modular application in use, and ensuring the use efficiency of the low-voltage cabinet.

[0038] Specific usage method of the present invention:

[0039] In a modular low-voltage JP cabinet capable of flexible expansion according to the present invention, first, when the device is in use, the switch of the micro-motor 7 can be turned on from an external controller. After the micro-motor 7 operates, the output shaft drives the rotating shaft 23 to rotate, thereby driving the top plate 21 to rotate. When the micro-motor 7 operates, it can also drive the second pulley 30 to rotate, so that the first pulley 29 is driven to rotate through the belt, thereby driving the top plate 21 and the rotating shaft 23 to rotate simultaneously. When the top plate 21 and the rotating shaft 23 rotate, the first toothed plate 20 can be driven to move downward. After the first toothed plate 20 moves, it drives the linkage folding plate 18 to move, and then slides in the first toothed plate 20 and pushes the top plate 21 to move, so as to drive the mounting plate 19 to move. After the mounting plate 19 moves, it drives a plurality of limiting pieces 12 to move, and then the rollers 11 roll inside the low-voltage cabinet body 1. After the limiting pieces 12 move, they drive the expansion frame 2 to move, so that the expansion frame 2 slides inside the telescopic groove 3, thereby increasing the expansion effect of the voltage cabinet. When the low-voltage cabinet is in use, with the tripping of the air switch, the unfolding wrench 14 can be driven to rotate, thereby driving the first limiting rod 15 and the third limiting rod 26 to move. After the first limiting rod 15 moves, it drives the adapter block 42 to move, and drives the swing plate 40 to move, and then the rotating seat 43 rotates on the linkage bridge 27. During the rotation, the clamping rod 45 is lifted and the reset elastic piece 46 is compressed, so that the follower frame plate 44 slides outside the limiting strip 41. During the sliding process, the cross plate 39 is driven to move. Under the movement of the cross plate 39, the clamping piece 32 is driven to move, so that the clamping plate 33 pulls out the wiring. Before wiring, the wire head is passed through the clamping piece 32 and abuts against the clamping plate 33, and then the bottom plate 35 is driven to compress the spring 38, which is beneficial to adjusting according to the use situation of the low-voltage cabinet during the use process. When there is an emergency, the externally connected wire inserted can be pulled out in time to ensure its safety. When the unfolding wrench 14 is closed and lowered, it can drive the second limiting rod 17 and the third limiting rod 26 to move, so that the third limiting rod 26 moves inside the through hole 28, thereby pushing the adapter block 42 to slide to both sides. During the sliding process, the linkage bridge 27 is driven to move, thereby driving the two upper air switch switches 9 to separate, preventing the internal components from affecting each other after a fire and ensuring its safety.

[0040] The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose is to enable those skilled in this field to understand the content of the present invention and implement it, and cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A modular low-voltage JP cabinet capable of flexible expansion, characterized in that: It includes a low-voltage cabinet body (1). An installation backboard (6) is installed inside the low-voltage cabinet body (1). An electrical connection sliding frame (25) is fixedly connected to the outer surface of the installation backboard (6). Two air switch switches (9) are slidably installed on the outer surface of the electrical connection sliding frame (25). An unfolding wrench (14) is rotatably installed on one side of the air switch switch (9). An unfolding protection component (552) is fixedly connected to the outer surface of the air switch switch (9). The unfolding protection component (552) includes a plurality of limiting sliding plates (16) fixedly connected to the outer surface of the air switch switch (9). A linkage bridge (27) is slidably arranged on the upper surfaces of the plurality of limiting sliding plates (16) on both sides. A rotating seat (43) is rotatably connected to the upper surfaces of the two linkage bridges (27). A swinging plate (40) is fixedly connected to the upper end of the rotating seat (43). Limiting strip blocks (41) are fixedly connected to both sides of the swinging plate (40). A follower frame plate (44) matching the limiting strip blocks (41) is slidably arranged on the outer surface of the swinging plate (40). A pulling-out disconnection component (551) is fixedly connected to the upper end of the follower frame plate (44). The pulling-out disconnection component (551) includes a cross plate (39) fixedly connected to the upper end of the follower frame plate (44). A plurality of openings (34) are formed in the upper surface of the cross plate (39). Two clamping pieces (32) are rotatably connected to the inner sides of the plurality of openings (34). A clamping plate (33) is fixedly connected to one side of each two clamping pieces (32). The bottom ends of the plurality of clamping pieces (32) are fixedly connected to a bottom plate (35). Two limiting openings (36) are formed in the middle of each two bottom plates (35). A limiting rod (37) is horizontally inserted between each two limiting openings (36) on both sides. A spring (38) is sleeved on the limiting rod (37) between the two bottom plates (35). An expansion adjustment component (553) is arranged inside the low-voltage cabinet body (1). A linkage engagement component (554) is fixedly connected to the inner wall of the low-voltage cabinet body (1). A driving control component (555) is fixedly installed on the inner wall of the low-voltage cabinet body (1). An unfolding door (8) is rotatably installed on one side of the low-voltage cabinet body (1).

2. The modular low-voltage JP cabinet capable of flexible expansion according to claim 1, characterized in that: A clamping rod (45) is fixedly connected to the bottom end of one side of the swinging plate (40). A groove corresponding to the clamping rod (45) is formed in one side of the linkage bridge (27). A reset elastic piece (46) is fixedly connected to the bottom end of the other side of the swinging plate (40).

3. A modular low-voltage JP cabinet capable of flexible expansion according to claim 1, characterized in that: The expansion adjustment component (553) includes a telescopic groove (3) formed in the outer wall of the low-voltage cabinet body (1). An expansion frame (2) slidably connected to the telescopic groove (3) is arranged on one side of the low-voltage cabinet body (1). A positioning frame (4) is arranged on one side of the low-voltage cabinet body (1). A plurality of limiting pieces (12) are fixedly connected to one side wall of the expansion frame (2). A plurality of rollers (11) are rotatably installed between the plurality of limiting pieces (12).

4. A modular low-voltage JP cabinet capable of flexible expansion according to claim 1, characterized in that: The linkage toothing assembly (554) comprises two limiting slide rails (24) fixedly connected to a side wall of the mounting back plate (6), the inner sides of the two limiting slide rails (24) are respectively slidably provided with a first tooth plate (20) and a first strip plate (22), and the bottom end of the first tooth plate (20) is rotatably connected to a linkage folding plate (18).

5. The modular low-voltage JP cabinet capable of flexible expansion according to claim 3, characterized in that: One side of the plurality of limit plates (12) is commonly fixedly connected to a mounting plate (19), one side of the mounting plate (19) is fixedly connected to a top plate (21), and an arc-shaped groove (31) is provided at the upper end of the top plate (21).

6. A modular low-voltage JP cabinet capable of flexible expansion according to claim 1, characterized in that: The driving and operating assembly (555) comprises a micro motor (7) fixedly mounted on a side wall of a mounting back plate (6), a rotating shaft (23) being installed and inserted in an upper and lower manner on one side of the mounting back plate (6), and the outer surfaces of the two rotating shafts (23) are fixedly sleeved with the rotating shafts (23), and the rotating shafts (23) are used in conjunction with the first tooth plate (20) and the first strip plate (22), respectively.

7. A modular low-voltage JP cabinet capable of flexible expansion according to claim 6, characterized in that: The outer surfaces of the two rotating shafts (23) are respectively fixedly sleeved with a first belt pulley (29) and a second belt pulley (30) connected by a belt, and the lower rotating shaft (23) is fixedly connected to the output shaft of the micro motor (7).

8. A modular low-voltage JP cabinet capable of flexible expansion according to claim 1, characterized in that: A plurality of cooling fans (10) are installed transversely at the lower portion of the installation back plate (6).

9. A modular low-voltage JP cabinet capable of flexible expansion according to claim 1, characterized in that: An adapter block (42) is fixedly connected to the upper end of one side of the two swing plates (40), and a first limiting pressure rod (15) is movably connected to the inner side of the adapter block (42), wherein the first limiting pressure rod (15) corresponds to the unfolding wrench (14).

10. A modular low-voltage JP cabinet capable of flexible expansion according to claim 9, characterized in that: The second limiting pressure rod (17) and the third limiting pressure rod (26) are rotatably connected to the corresponding sides of the two adapter blocks (42); a through opening (28) is provided in the middle of the second limiting pressure rod (17); and the third limiting pressure rod (26) and the through opening (28) are interlaced.

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