Modularized low-voltage JP cabinet capable of being flexibly expanded

Abstract

The invention relates to the technical field of low-voltage JP cabinets, and discloses a modular low-voltage JP cabinet capable of being flexibly expanded, which comprises a low-voltage cabinet body, a mounting back plate is mounted in the low-voltage cabinet body, an electric connection sliding frame is fixedly connected to the outer surface of the mounting back plate, and two air switches are slidably mounted on the outer surface of the electric connection sliding frame. One side of the air switch is rotatably provided with an unfolding wrench, the outer surface of the air switch is fixedly connected with an unfolding protection assembly, and the unfolding protection assembly comprises a plurality of limiting sliding plates fixedly connected to the outer surface of the air switch, so that when a low-voltage line goes wrong in a low-voltage JP cabinet, the line of the air switch can be automatically separated; the protection function failure of the JP cabinet caused by forced connection is avoided, the low-voltage cabinet body can be flexibly expanded according to the actual use condition of the JP cabinet, the modular application is improved, and the use efficiency of the low-voltage cabinet is guaranteed.

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] ‌Low voltage JP cabinet‌, full name JP type low voltage power distribution reactive compensation integrated cabinet, is a new type of outdoor power distribution reactive compensation integrated cabinet, designed to ensure safety, economy, rationality and reliability. It is suitable for AC 50Hz, rated voltage 380V distribution systems such as urban network, rural network transformation, industrial and mining enterprises, street lighting, residential areas, etc., with power distribution, control, protection, reactive compensation, power metering and other functions.

[0003] At present, the existing modular low-voltage JP cabinets that can be flexibly expanded have the following shortcomings in use: the existing modular low-voltage JP cabinets that can be flexibly expanded are generally fixedly designed and installed in a predetermined position. When the low-voltage line is grounded or short-circuited, the JP cabinet will activate the protection mechanism to trip and cut off the power. Sometimes, people are anxious to use the cabinet because they are not clear about the fundamental problem and try to close the circuit breaker to supply power by themselves. They forcibly connect the circuit breaker up and down with wires, which will cause the JP cabinet to lose its protection function and operate under the fault current for a long time, which may eventually be overloaded and burned. When there are many terminals installed, it cannot meet the needs and needs to be solved with additional cabinets. However, the installed cabinets cannot be used up, resulting in cost waste and other problems.

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

[0005] The object 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, which solves the following problems: the existing modular low-voltage JP cabinet that can be flexibly expanded is generally fixedly designed and installed at a predetermined position. When the low-voltage line is grounded or short-circuited, the JP cabinet will activate the protection mechanism to trip and cut off the power. Sometimes, because personnel are not clear about the fundamental problem and are anxious to use it, they privately open the door of the JP cabinet and try to close the circuit breaker to transmit power by themselves, and forcibly connect the circuit breaker up and down with a wire, which will cause the JP cabinet to lose its protection function, operate under the fault current for a long time, and eventually overload and burn. When there are many terminals installed, it cannot meet the needs, and it is necessary to add a cabinet to solve the problem, but the installed cabinet cannot be used up, resulting in a waste of cost and other problems; To achieve the above objectives, the present invention is implemented through the following technical solutions: The technical solution adopted by the present invention to solve its technical problems is: a modular low-voltage JP cabinet that can be flexibly expanded, including a low-voltage cabinet body, a mounting back plate is installed inside the low-voltage cabinet body, an outer surface of the mounting back plate is fixedly connected to an electrical connection slide, two air switches are slidably installed on the outer surface of the electrical connection slide, an expansion wrench is rotatably installed on one side of the air switch, an expansion protection component is fixedly connected to the outer surface of the air switch, and the expansion protection component includes a plurality of limit slides fixedly connected to the outer surface of the air switch, and a linkage bridge is slidably provided on the upper surfaces of the plurality of limit slides on both sides, and a rotating seat is rotatably connected to the upper surfaces of the two linkage bridges, and a swing plate is fixedly connected to the upper end of the rotating seat, and limiting bars are fixedly connected to both sides of the swing plate, and the outer surface of the swing plate is slidably provided with a limit bar that is connected to the limiting bar. The cam is provided with a plurality of latches, and the latch is provided with a plurality of latches on the upper and lower surfaces of the latching plates, and the latch is connected with a plurality of latches on the lower and upper surfaces of the latching plates.

[0007] Preferably, a clamping rod is fixedly connected to the bottom end of one side of the swing plate, a groove corresponding to the clamping rod is provided on one side of the linkage bridge, and a reset elastic sheet is fixedly connected to the bottom end of the other side of the swing plate.

[0008] Preferably, the expansion adjustment component includes a telescopic groove opened on the outer wall of the low-voltage cabinet body, an expansion frame slidably connected to the telescopic groove is provided on one side of the low-voltage cabinet body, a positioning frame is provided on one side of the low-voltage cabinet body, and a side wall of the expansion frame is fixedly connected with multiple limit plates, and multiple rollers are rotatably installed between the multiple limit plates.

[0009] Preferably, the linkage engaging assembly includes two limiting slide rails fixedly connected to one side wall of the mounting back plate, and the inner sides of the two limiting slide rails are respectively slidably provided with a first tooth plate and a first strip plate, and the bottom end of the first tooth plate is rotatably connected to a linkage folding plate.

[0010] Preferably, one side of the plurality of limit plates is commonly fixedly connected to a mounting plate, one side of the mounting plate is fixedly connected to a top plate, and an arc groove is formed at an upper end of the top plate.

[0011] Preferably, the driving and controlling assembly includes a micro motor fixedly mounted on a side wall of a mounting back plate, a rotating shaft is installed up and down on one side of the mounting back plate, and the outer surfaces of the two rotating shafts are fixedly mounted with rotating shafts, and the rotating shafts are respectively used in conjunction with the first tooth plate and the first strip plate.

[0012] Preferably, the outer surfaces of the two rotating shafts are respectively fixedly mounted with a first pulley and a second pulley connected by a belt, and the lower rotating shaft is fixedly connected to the output shaft of the micro motor.

[0013] Preferably, a plurality of cooling fans are laterally mounted on the lower portion of the mounting back plate.

[0014] Preferably, an adapter block is fixedly connected to the upper end of one side of the two swing plates, and a first limiting pressure rod is movably connected to the inner side of the adapter block, and the first limiting pressure rod corresponds to the unfolding wrench.

[0015] Preferably, the second limiting pressure rod and the third limiting pressure rod are rotatably connected to the corresponding sides of the two adapter blocks respectively, a through opening is opened in the middle of the second limiting pressure rod, and the third limiting pressure rod is interspersed with the through opening.

[0016] Beneficial effects of the present invention: 1. In a modular low-voltage JP cabinet that can be flexibly expanded according to the present invention, the output shaft drives the rotating shaft to rotate after the micro motor is turned on, thereby driving the top plate to rotate. When the micro motor is running, it can also drive the second pulley to rotate, so that the first pulley is driven to rotate by the belt, thereby driving the top plate and the rotating shaft to rotate at the same time. When the top plate and the rotating shaft rotate, the first tooth plate can be driven to move downward. After the first tooth plate moves, it drives the linkage folding plate to move, thereby sliding in the first tooth plate and pushing the top plate to move, so as to drive the installation plate to move. After the installation plate moves, it drives multiple limit plates to move, and then allows the roller to roll on the inner side of the low-voltage cabinet. After the limit plate moves, it drives the expansion frame to move, so that the expansion frame slides on the inner side of the telescopic groove, thereby increasing the expansion effect of the voltage cabinet, which is conducive to flexibly expanding the low-voltage cabinet according to the actual use of the JP cabinet, improving the modular application of use, and ensuring the use efficiency of the low-voltage cabinet.

[0017] 2. In a modular low-voltage JP cabinet that can be flexibly expanded in the present invention, the wrench is rotated to drive the first limiting pressure rod and the third limiting pressure rod to move. When the first limiting pressure rod moves, it drives the transfer block to move, and drives the swing plate to move, and then the rotating seat rotates on the linkage bridge. During the rotation, the card rod is lifted and the reset elastic sheet is compressed, so that the follower frame plate slides outside the limiting block, and the sliding process drives the cross plate to move. Under the movement of the cross plate, the clamping sheet is driven to move, so that the card plate can be pulled out of the wiring. Before wiring, the wire head is passed through the clamping sheet and contacts the card plate, and then the bottom plate is driven to compress the spring, which is beneficial to be able to be based on the use process. It is adjusted according to the usage of the low-voltage cabinet. When there is an emergency, the connected external wires can be unplugged in time to ensure its safety. When the wrench is unfolded and closed, the second limiting pressure rod and the third limiting pressure rod can be driven to move, so that the third limiting pressure rod can move in the opening, thereby pushing the adapter block to slide to both sides. During the sliding process, the linkage bridge is driven to move, thereby driving the two upper circuit breakers to separate, preventing the internal components from affecting each other after a fire, ensuring its safety. It is beneficial to the low-voltage JP cabinet. When there is a problem with the low-voltage line, the circuit breaker line can be automatically separated to avoid forced connection that causes the protection function of the JP cabinet to fail. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 The present invention Figure 1 Schematic diagram of the cross-sectional structure of medium and low voltage cabinets; Figure 3 The present invention Figure 2 Schematic diagram of the multi-component structure; Figure 4 The present invention Figure 3 The schematic diagram of the structure of the protection component and the linkage gear component is shown in the figure; Figure 5 The present invention Figure 4 Schematic diagram of the structure at A in the middle; Figure 6 The present invention Figure 4 A magnified schematic diagram of the structure at B in the middle; Figure 7 The present invention Figure 1The schematic diagram of the structure is shown in the middle view; Figure 8 The present invention Figure 1 Schematic diagram of the structure from above.

[0021] In the figure: 1. Low voltage cabinet; 2. Extension frame; 3. Telescopic slot; 4. Positioning frame; 551. Pull out disconnection assembly; 552. Expand protection assembly; 553. Expand adjustment assembly; 554. Linkage engagement assembly; 555. Drive control assembly; 6. Install back panel; 7. Micro motor; 8. Expand door; 9. Air switch; 10. Cooling fan; 11. Roller; 12. Limiting piece; 14. Expanding wrench; 15. First limiting pressure rod; 16. Limiting slide plate; 17. Second limiting pressure rod; 18. Linkage folding plate; 19. Mounting plate; 20. First gear Plate 20; 21, top plate; 22, first strip; 23, rotating shaft; 24, limiting slide rail; 25, electric slide; 26, third limiting pressure rod; 27, linkage bridge; 28, through port; 29, first pulley; 30, second pulley; 31, arc groove; 32, clamping piece; 33, clamping plate; 34, opening; 35, bottom plate; 36, limiting port; 37, limiting rod; 38, spring; 39, cross plate; 40, swing plate; 41, limiting strip; 42, adapter block; 43, rotating seat; 44, follower frame; 45, clamping rod; 46, reset elastic sheet. DETAILED DESCRIPTION

[0022] The embodiment of the present invention provides a modular low-voltage JP cabinet that can be flexibly expanded, thereby solving the following problems: the existing modular low-voltage JP cabinet that can be flexibly expanded is generally fixedly designed and installed at a predetermined position. When the low-voltage line is grounded or short-circuited, the JP cabinet will activate the protection mechanism to trip and cut off the power. Sometimes, because personnel are not clear about the fundamental problem and are anxious to use it, they privately open the door of the JP cabinet and try to close the circuit breaker to transmit power by themselves, and forcibly connect the circuit breaker up and down with a wire, which will cause the JP cabinet to lose its protection function, operate under the fault current for a long time, and eventually overload and burn out. When there are many terminals installed, it cannot meet the needs, and additional cabinets need to be added to solve the problem, but the additional cabinets cannot be used up, resulting in a waste of costs. In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] In conjunction with Figures 1-8, a modular low-voltage JP cabinet that can be flexibly expanded includes a low-voltage cabinet body 1, a mounting back plate 6 is installed inside the low-voltage cabinet body 1, and an outer surface of the mounting back plate 6 is fixedly connected to an electric link slide 25, and two air switches 9 are slidably installed on the outer surface of the electric link slide 25, and an expansion wrench 14 is rotatably installed on one side of the air switch 9, and an expansion protection component 552 is fixedly connected to the outer surface of the air switch 9, and the expansion protection component 552 includes a plurality of limit slides 16 fixedly connected to the outer surface of the air switch 9, and the upper surfaces of the plurality of limit slides 16 on both sides are slidably provided with a linkage bridge 27, and the upper surfaces of the two linkage bridges 27 are rotatably connected to a rotating seat 43, and the upper end of the rotating seat 43 is fixedly connected to a swing plate 40, and both sides of the swing plate 40 are fixedly connected to limit bars 41, and the outer surface of the swing plate 40 is slidably provided with a follower frame plate 44 matching the limit bars 41, and the follower frame plate 44 The upper end is fixedly connected with a pull-out disconnection component 551, which includes a horizontal plate 39 fixedly connected to the upper end of the follower frame plate 44. The upper surface of the horizontal plate 39 is provided with a plurality of openings 34. The inner sides of the plurality of openings 34 are rotatably connected with two clamping pieces 32. A clamping plate 33 is fixedly connected to one side of each of the two clamping pieces 32. The bottom ends of the plurality of clamping pieces 32 are fixedly connected with a bottom plate 35. Two limiting openings 36 are provided in the middle of each of the two bottom plates 35. A limiting rod 37 is transversely inserted between the limiting openings 36 on both sides. The limiting rod 37 is located between the two bottom plates 35 and is provided with a spring 38. An expansion adjustment component 553 is provided on the inner side of the low-voltage cabinet 1. A linkage gearing component 554 is fixedly connected to the inner wall of the low-voltage cabinet 1. A driving control assembly 555 is fixedly installed on the inner wall of the low-voltage cabinet 1, and an unfolding door 8 is rotatably installed on one side of the low-voltage cabinet 1. A clamping rod 45 is fixedly connected to the bottom end of one side of the swing plate 40, and a groove corresponding to the clamping rod 45 is opened on one side of the linkage bridge 27. A reset elastic sheet 46 is fixedly connected to the bottom end of the other side of the swing plate 40, and an adapter block 42 is fixedly connected to the upper end of one side of the two swing plates 40. The inner side of the adapter block 42 is movably connected with a first limiting pressure rod 15, and the first limiting pressure rod 15 corresponds to the unfolding wrench 14. The corresponding sides of the two adapter blocks 42 are respectively rotatably connected with a second limiting pressure rod 17 and a third limiting pressure rod 26, and a through opening 28 is opened in the middle of the second limiting pressure rod 17, and the third limiting pressure rod 26 and the through opening 28 are interspersed.

[0024] According to the above technical solution, when the low-voltage cabinet is in use, as the circuit breaker trips, the expansion wrench 14 can be driven to rotate, thereby driving the first limiting pressure rod 15 and the third limiting pressure rod 26 to move. When the first limiting pressure rod 15 moves, the adapter block 42 is driven to move, and the swing plate 40 is driven to move, and the rotating seat 43 is rotated on the linkage bridge 27. During the rotation, the clamping rod 45 is lifted and the reset elastic sheet 46 is compressed, so that the follower frame plate 44 slides outside the limiting bar 41, and the sliding process drives the cross plate 39 to move. Under the movement of the cross plate 39, the clamping sheet 32 ​​is driven to move, so that the clamping plate 33 is pulled out of the wiring. Before wiring, the wire head is passed through the clamping sheet 32 ​​and contacts the clamping plate 33, and then the bottom plate 35 is driven to press the spring 36. 8 is compressed, which is beneficial for adjusting according to the use of the low-voltage cabinet during use. When there is an emergency, the connected external wires can be unplugged in time to ensure its safety. When the unfolding wrench 14 is closed and descended, the second limiting pressure rod 17 and the third limiting pressure rod 26 can be driven to move, so that the third limiting pressure rod 26 can move in the through opening 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-break switches 9 to separate, preventing the internal components from affecting each other after a fire, ensuring its safety, and being able to automatically separate the air-break lines when there is a problem with the low-voltage line to avoid forced connection that causes the protection function of the JP cabinet to fail.

[0025] A further technical solution is that the expansion adjustment component 553 includes a telescopic groove 3 opened on the outer wall of the low-voltage cabinet 1, an expansion frame 2 slidably connected to the telescopic groove 3 is provided on one side of the low-voltage cabinet 1, a positioning frame 4 is provided on one side of the low-voltage cabinet 1, a plurality of limit plates 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 limit plates 12, and a linkage gearing component 554 includes two limit rails 24 fixedly connected to one side wall of the mounting back plate 6, a first tooth plate 20 and a first strip plate 22 are slidably provided on the inner sides of the two limit rails 24, a linkage folding plate 18 is rotatably connected to the bottom end of the first tooth plate 20, and one side of the plurality of limit plates 12 is fixed together. A mounting plate 19 is connected, a top plate 21 is fixedly connected to one side of the mounting plate 19, an arc groove 31 is opened at the upper end of the top plate 21, the driving and operating component 555 includes a micro motor 7 fixedly mounted on a side wall of the mounting back plate 6, a rotating shaft 23 is installed on one side of the mounting back plate 6 through the upper and lower parts, the outer surfaces of the two rotating shafts 23 are fixedly mounted with the rotating shaft 23, the rotating shaft 23 is respectively used in conjunction with the first tooth plate 20 and the first strip plate 22, the outer surfaces of the two rotating shafts 23 are respectively fixedly mounted with a first pulley 29 and a second pulley 30 connected by a belt, the lower rotating shaft 23 is fixedly connected to the output shaft of the micro motor 7, and a plurality of cooling fans 10 are horizontally mounted on the lower part of the mounting back plate 6.

[0026] According to 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. When the micro motor 7 is running, the output shaft drives the rotating shaft 23 to rotate, thereby driving the top plate 21 to rotate. When the micro motor 7 is running, it can also drive the second pulley 30 to rotate, so that the first pulley 29 is driven by the belt to rotate, thereby driving the top plate 21 and the rotating shaft 23 to rotate at the same time. When the top plate 21 and the rotating shaft 23 rotate, the first tooth plate 20 can be driven to move downward. After the first tooth plate 20 moves, it drives the linkage folding plate 18 to move. Thereby, the first tooth plate 20 slides and pushes the top plate 21 to move, thereby driving the mounting plate 19 to move. After the mounting plate 19 moves, it drives multiple limit plates 12 to move, and then the roller 11 rolls on the inner side of the low-voltage cabinet 1. After the limit plate 12 moves, it drives the expansion frame 2 to move, so that the expansion frame 2 slides on the inner side of the telescopic slot 3. When the first plate 22 slides to the maximum position of the limit slide rail 24, the micro motor 7 stops running, thereby increasing the expansion effect of the voltage cabinet, which is conducive to flexibly expanding the low-voltage cabinet according to the actual use of the JP cabinet, improving the modular application of use, and ensuring the use efficiency of the low-voltage cabinet.

[0027] Specific use of the present invention: In a modular low-voltage JP cabinet that can be flexibly expanded according to the present invention, first, when the equipment is in use, the switch of the micro motor 7 can be turned on from an external controller. When the micro motor 7 is running, the output shaft drives the rotating shaft 23 to rotate, thereby driving the top plate 21 to rotate. When the micro motor 7 is running, it can also drive the second pulley 30 to rotate, so that the first pulley 29 is driven by the belt to rotate, thereby driving the top plate 21 and the rotating shaft 23 to rotate at the same time. When the top plate 21 and the rotating shaft 23 rotate, the first tooth plate 20 can be driven to move downward. After the first tooth plate 20 moves, it drives the linkage folding plate 18 to move. Thereby, the first tooth plate 20 slides inside 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 multiple limit plates 12 to move, and then the roller 11 rolls on the inner side of the low-voltage cabinet 1. After the limit plate 12 moves, it drives the expansion frame 2 to move, so that the expansion frame 2 slides on the inner side of the telescopic slot 3, thereby increasing the expansion effect of the voltage cabinet. When the low-voltage cabinet is in use, as the air switch trips, it can drive the expansion wrench 14 to rotate, thereby driving the first limiting pressure rod 15 and the third limiting pressure rod 26 to move. When the first limiting pressure 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 card rod 45 is lifted and the reset elastic sheet 46 is compressed, so that the follower frame plate 44 slides outside the limiting bar 41, and the sliding During the movement, the cross plate 39 is driven to move, and the movement of the cross plate 39 drives the clamping piece 32 to move, so that the card plate 33 can be pulled out of the wiring. Before wiring, the wire head is passed through the clamping piece 32 and contacts the card plate 33, and then the bottom plate 35 is driven to compress the spring 38, which is beneficial for adjustment according to the use of the low-voltage cabinet during use. When there is an emergency, the plugged external wires can be pulled out in time to ensure its safety. When the unfolding wrench 14 is closed and lowered, the second limiting pressure rod 17 and the third limiting pressure rod 26 can be driven to move, so that the third limiting pressure rod 26 can move in the through port 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 switches 9 to separate, preventing the internal components from affecting each other after a fire, thereby ensuring its safety.

[0028] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology in this field to understand the content of the present invention and implement it, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A modular low-voltage JP cabinet that can be flexibly expanded, characterized by: The invention comprises a low-voltage cabinet (1), wherein a mounting back plate (6) is installed inside the low-voltage cabinet (1), an outer surface of the mounting back plate (6) is fixedly connected to an electric link slide (25), two air switches (9) are slidably mounted on the outer surface of the electric link slide (25), an expansion wrench (14) is rotatably mounted on one side of the air switch (9), an expansion protection component (552) is fixedly connected to the outer surface of the air switch (9), and the expansion protection component (552) comprises a fixed connection to the outer surface of the air switch (9) A plurality of limit slides (16) are provided, and a linkage bridge (27) is slidably disposed on the upper surfaces of the plurality of limit slides (16) on both sides. A rotating seat (43) is rotatably connected to the upper surfaces of the two linkage bridges (27). A swing plate (40) is fixedly connected to the upper end of the rotating seat (43). Limiting bars (41) are fixedly connected to both sides of the swing plate (40). A follower frame (44) matching the limiting bars (41) is slidably disposed on the outer surface of the swing plate (40). The follower frame (44) The upper end of the pull-out disconnection assembly (551) is fixedly connected to the upper end of the follower frame plate (44), and the pull-out disconnection assembly (551) includes a horizontal plate (39) fixedly connected to the upper end of the follower frame plate (44), and the upper surface of the horizontal plate (39) is provided with a plurality of openings (34), and the inner sides of the plurality of openings (34) are rotatably connected to two clamping pieces (32), one side of each of the two clamping pieces (32) is fixedly connected to a clamping plate (33), the bottom ends of the plurality of clamping pieces (32) are fixedly connected to a bottom plate (35), and the middle parts of each of the two bottom plates (35) are opened. Two limit openings (36) are provided, and a limit rod (37) is arranged transversely between the limit openings (36) on each side, and the limit rod (37) is located between the two bottom plates (35) and is sleeved with a spring (38), an expansion adjustment component (553) is arranged on the inner side of the low-voltage cabinet (1), a linkage gearing component (554) is fixedly connected to the inner wall of the low-voltage cabinet (1), a driving control component (555) is fixedly installed on the inner wall of the low-voltage cabinet (1), and an unfolding door (8) is rotatably installed on one side of the low-voltage cabinet (1).

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

3. According to claim 1, a modular low-voltage JP cabinet capable of flexible expansion is characterized in that: The expansion adjustment component (553) comprises a telescopic slot (3) provided on the outer wall of the low-voltage cabinet (1); an expansion frame (2) slidably connected to the telescopic slot (3) is provided on one side of the low-voltage cabinet (1); a positioning frame (4) is provided on one side of the low-voltage cabinet (1); a plurality of limit plates (12) are fixedly connected to one side wall of the expansion frame (2); and a plurality of rollers (11) are rotatably mounted between the plurality of limit plates (12).

4. According to claim 1, a modular low-voltage JP cabinet capable of flexible expansion is 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. According to claim 3, a modular low-voltage JP cabinet capable of flexible expansion is 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. The modular low-voltage JP cabinet capable of flexible expansion according to claim 1 is 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. The modular low-voltage JP cabinet capable of flexible expansion according to claim 6 is 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. The modular low-voltage JP cabinet capable of flexible expansion according to claim 1 is characterized in that: A plurality of cooling fans (10) are installed transversely at the lower portion of the installation back plate (6).

9. The modular low-voltage JP cabinet capable of flexible expansion according to claim 1 is 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. The 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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