Intelligent alternating-current low-voltage switch cabinet for power distribution

Abstract

The invention relates to the technical field of low-voltage switch cabinets, in particular to a power distribution intelligent alternating-current low-voltage switch cabinet which comprises a cabinet body and extraction modules evenly arranged in the cabinet body in the height direction of the cabinet body. Lap joint blocks are fixedly arranged on the upper portion and the lower portion of the extraction module respectively, a winder is arranged on the side, facing the interior of the cabinet body, of each lap joint block, an insulating film is wound in each winder, a coil spring for providing winding force for the insulating film is further arranged in each winder, one end of the insulating film extends out of each winder, and the other end of the insulating film extends out of the corresponding winder. A clamping block is fixedly arranged at the end, extending out of the winder, of the insulating film, the clamping block is located on one side of the lap joint block and makes contact with the lap joint block, and when the extraction module slides out of the cabinet body, the clamping block synchronously moves along with the lap joint block. According to the low-voltage switch cabinet, the condition of accidental electric shock of a worker during maintenance is avoided, and normal heat dissipation of the extraction module in the low-voltage switch cabinet can be ensured when the low-voltage switch cabinet is in normal operation.

Description

Technical Field

[0001] The invention relates to the technical field of low-voltage switch cabinets, and in particular to an intelligent power distribution type AC low-voltage switch cabinet. Background Art

[0002] The intelligent AC low-voltage switchgear for power distribution has a variety of structures according to the needs of the use scenarios, including a withdrawable low-voltage switchgear for easy maintenance. The existing withdrawable low-voltage switchgear has multiple drawer unit modules. When the switchgear is operating normally, when a unit module is to be repaired and maintained, it is necessary to first disconnect the power supply between the unit module and the cabinet, and then open the mechanical locking structure of the unit module to draw out the unit module for maintenance. This operation method is more troublesome, and after the mechanical locking structure is opened, if the switch of the unit module is damaged and fails, the drawer unit module is pulled out, which may cause power safety accidents when the technicians are repairing. In addition, when the unit module is pulled out or closed, a high-voltage arc is easily generated when the contacts of the unit module are close to the energized contacts of the cabinet, which may easily cause the contacts to burn under the action of the high-voltage arc.

[0003] Chinese patent announcement number CN116885611B discloses a withdrawable low-voltage switch cabinet for preventing misoperation, comprising a cabinet body and a withdrawable unit module, wherein the cabinet body is slidably connected to the withdrawable unit module, and the inner wall of the cabinet body is provided with two groups of insulating plates on the back side of the withdrawable unit module, and the outer wall of each group of the insulating plates is fixedly installed with a conductive column, and a first sliding groove is provided inside each group of the conductive columns, and a first spring is fixedly connected to the inner wall of each group of the first sliding groove, and the other end of each group of the first spring is fixedly connected with a first conductive block that slides in contact with the first sliding groove, and a guide groove is obliquely provided inside each group of the first conductive blocks, and a fixed plate is fixedly provided on the inner wall of the cabinet body, and a conducting component for driving the two groups of first conductive blocks to contact or disconnect is provided inside the fixed plate, and a second conductive block is fixedly provided on the outer wall of the withdrawable unit module, and a conductive plate is installed on the inner wall of the cabinet body on one side of a group of conductive columns.

[0004] Although the above scheme avoids the possibility of electric shock to maintenance personnel when they pull out a single module for maintenance to a certain extent, the structure for powering a single module is large in size, and nearly half of the space in the low-voltage switch cabinet is occupied by the power supply structure, resulting in low space utilization of the low-voltage switch cabinet, and lack of isolation between adjacent unit modules. When one of the unit modules is pulled out, the adjacent unit modules are still powered on, and maintenance personnel are still at risk of electric shock during maintenance. If a structure for insulation is fixed directly between adjacent unit modules, it will affect the heat dissipation of the unit modules during operation. Summary of the invention

[0005] In view of the above problems, an intelligent AC low-voltage switch cabinet for power distribution is provided to avoid accidental electric shock to workers during maintenance. At the same time, it also ensures that the drawer modules in the low-voltage switch cabinet can dissipate heat normally when the low-voltage switch cabinet is in normal operation.

[0006] In order to solve the problems of the prior art, the present invention provides an intelligent AC low-voltage switch cabinet for power distribution, comprising a cabinet body and pull-out modules uniformly arranged in the cabinet body along the height direction of the cabinet body; overlapping blocks are fixedly arranged at the upper and lower parts of the pull-out modules respectively, and a reel is arranged on the side of each overlapping block facing the inside of the cabinet body, an insulating film is wound in the reel, and a winding spring is also arranged in the reel to provide a winding force for the insulating film, one end of the insulating film extends from the reel, and a clamping block is fixedly arranged on the end of the insulating film extending from the reel, the clamping block is located on one side of the overlapping block and contacts with the overlapping block, and when the pull-out module slides out of the cabinet body, the clamping block moves synchronously with the overlapping block.

[0007] Preferably, a power supply unit for supplying power to the pull-out module is provided in the cabinet, the power supply unit comprises a power supply bar vertically fixed on the inner wall of the cabinet, and a power supply slot for plugging with the power supply bar is provided on the side wall of the pull-out module.

[0008] Preferably, a pop-up unit capable of popping out the pull-out module is provided on the side of the pull-out module facing the cabinet, and the pop-up unit comprises a telescopic tube, one end of which is fixedly provided on the pull-out module, and the pull-out module pops out when the telescopic tube is extended.

[0009] Preferably, a liquid supply pipe is provided on the end of the telescopic tube away from the withdrawal module, both the liquid supply pipe and the telescopic tube are filled with hydraulic oil, a switch valve is provided on the liquid supply pipe, and a pressure unit for pressing the hydraulic oil into the liquid supply pipe is provided on the end of the liquid supply pipe away from the telescopic tube.

[0010] Preferably, the pressure unit includes a main line vertically arranged in the cabinet, the main line is connected to the liquid supply pipe, an oil tank filled with hydraulic oil is fixedly arranged on the upper part of the main line, and a gravity block is arranged in the oil tank for movement in the vertical direction, and the gravity block provides pressure to the hydraulic oil in the oil tank.

[0011] Preferably, a trigger unit for controlling the switch of the switch valve is provided on the cabinet, and the trigger unit includes a gear fixedly connected to the valve core of the switch valve, a rack is provided on one side of the gear for movement in the horizontal direction, and the rack and the gear are meshed with each other, and a pressing rod is fixedly provided at the end of the rack along the extension direction of the rack, and the pressing rod passes through the cabinet and slides with the cabinet.

[0012] Preferably, a limit plate is fixedly provided on the side wall of the pressing rod, the limit plate is located inside the cabinet, there is a gap between the limit plate and the side wall of the cabinet, a spring is provided in the gap along the extension direction of the pressing rod, and both ends of the spring are fixedly connected to the limit plate and the inner wall of the cabinet respectively.

[0013] Preferably, a hoist is provided above the gravity block, a traction rope is wound inside the hoist, one end of the traction rope is fixedly connected to the gravity block, a return pipe is connected in parallel to one side of the liquid supply pipe, a one-way valve is provided on the return pipe, and the one-way valve allows the hydraulic oil in the telescopic tube to flow into the main pipeline.

[0014] Preferably, a deceleration unit is provided on one side of the pull-out module, and the deceleration unit includes a deceleration rod fixedly provided on one side of the pull-out module along the moving direction of the pull-out module, and a deceleration sleeve plugged into and mating with the deceleration rod is fixedly provided on the inner wall of the cabinet along the extension direction of the deceleration rod, and an exhaust hole is provided on the deceleration sleeve, and the diameter of the exhaust hole is smaller than the inner diameter of the deceleration sleeve.

[0015] Preferably, the end surface of the drawer module at one end outside the cabinet is a plane.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention provides overlapping blocks at the upper and lower parts of each withdrawal module, and at the same time, provides a reel with an insulating film wound inside on one side of each overlapping block, a coil spring which can automatically reel up the insulating film is provided in the reel, and a clamping block which can move synchronously with the overlapping block is fixedly provided on one end of the insulating film extending from the reel. When the withdrawal module is in an undrawn state, the insulating film is rolled up in the reel, and the withdrawal module and its adjacent withdrawal modules are connected to each other, and the cooling fan can dissipate heat for all the withdrawal modules. When the withdrawal module is pulled out, the withdrawal module pulls out the insulating films on its upper and lower sides, and the insulating film isolates other withdrawal modules adjacent to the withdrawal module as the withdrawal module is pulled out, thereby avoiding accidental electric shock to the staff during maintenance, and at the same time ensuring that when the low-voltage switch cabinet is in normal operation, the withdrawal modules in the low-voltage switch cabinet can dissipate heat normally. At the same time, the clamping block and the overlapping block are in contact with each other, and the clamping block is driven to move synchronously by the overlapping block, instead of directly fixing the insulating film on the withdrawal module, which facilitates the subsequent replacement of the insulating film; 2. A power supply bar is arranged on the cabinet, and a power supply slot which slides with the power supply bar is fixedly arranged on the drawer module. When the drawer module is fully inserted into the cabinet, the power supply slot arranged on the drawer module is electrically connected with the power supply bar arranged on the cabinet, and the power supply slot slides with the power supply bar. When the drawer module is drawn out, the power supply slot is disconnected from the power supply bar, and the drawn out drawer module is automatically powered off. 3. By setting up the trigger unit and the pop-up unit, the staff does not need to touch the pull-out module in a powered state when inspecting the pull-out module. Instead, they can press the button to make the pull-out module pop out. When the button presses the pressing rod, the limit plate moves synchronously with the pressing rod, and the limit plate stretches the spring. Then the rack drives the gear to rotate, and the rotating gear opens the valve core of the switch valve. Then the gravity block presses the hydraulic oil in the oil tank into the main line through its own weight, and the pull-out module corresponding to the button is completely pushed out by the extended telescopic tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of a power distribution intelligent AC low-voltage switch cabinet of the present invention; Figure 2 The present invention is a cross-sectional perspective view of an intelligent AC low-voltage switch cabinet for power distribution Figure 1 ; Figure 3 The invention is a kind of intelligent AC low-voltage switch cabinet for power distribution Figure 2 A local enlarged schematic diagram of the middle A; Figure 4 The present invention is a cross-sectional perspective view of an intelligent AC low-voltage switch cabinet for power distribution Figure 2 ; Figure 5 The invention is a kind of intelligent AC low-voltage switch cabinet for power distribution Figure 4 A partial enlarged schematic diagram of point B in the middle; Figure 6 The invention is a kind of intelligent AC low-voltage switch cabinet for power distribution Figure 4 A partial enlarged schematic diagram of point C in the middle; Figure 7 It is a three-dimensional schematic diagram of a power distribution intelligent AC low-voltage switch cabinet of the present invention after a draw-out module is drawn out and the cabinet body is removed; Figure 8 The invention is a kind of intelligent AC low-voltage switch cabinet for power distribution Figure 7 A partial enlarged schematic diagram of point D in the middle; Fig. 9 The invention is a kind of intelligent AC low-voltage switch cabinet for power distribution Figure 7 A partial enlarged schematic diagram of point E in the middle; Fig.10 It is a three-dimensional schematic diagram of a power distribution intelligent AC low-voltage switch cabinet of the present invention with the cabinet body removed; Fig.11 The invention is a kind of intelligent AC low-voltage switch cabinet for power distribution Fig.10 A partial enlarged schematic diagram of point F in the middle; Fig.12 It is a three-dimensional schematic diagram of a power distribution intelligent AC low-voltage switch cabinet of the present invention after removing the cabinet body and the power supply unit; Fig.13 It is a three-dimensional schematic diagram of a pop-up unit of an intelligent power distribution AC low-voltage switch cabinet of the present invention.

[0018] The numbers in the figure are: 1. cabinet; 11. pull-out module; 12. overlap block; 13. partition plate; 131. guide rail; 132. heat sink; 14. cooling fan; 2. winder; 21. insulation film; 22. clamping block; 3. power supply unit; 31. power supply slot; 32. power supply bar; 4. pop-up unit; 41. telescopic tube; 42. pressure unit; 421. main line; 422. oil tank; 423. gravity block; 43. liquid supply pipe; 44. switch valve; 45. hoist; 46. return pipe; 47. one-way valve; 48. trigger button; 5. trigger unit; 51. gear; 52. rack; 53. press rod; 54. button; 55. limit plate; 56. spring; 6. deceleration unit; 61. deceleration rod; 62. deceleration sleeve; 621. exhaust hole. DETAILED DESCRIPTION

[0019] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0020] Reference Figure 1-Figure 4 : An intelligent AC low-voltage switch cabinet for power distribution, comprising a cabinet 1 and pull-out modules 11 uniformly arranged in the cabinet 1 along the height direction of the cabinet 1; overlap blocks 12 are fixedly arranged at the upper and lower parts of the pull-out modules 11, and a reel 2 is arranged on the side of each overlap block 12 facing the inside of the cabinet 1, an insulating film 21 is wound in the reel 2, and a coil spring is also arranged in the reel 2 to provide a winding force for the insulating film 21, one end of the insulating film 21 extends from the reel 2, and a clamping block 22 is fixedly arranged on the end of the insulating film 21 extending from the reel 2, the clamping block 22 is located on one side of the overlap block 12 and contacts with the overlap block 12, and when the pull-out module 11 slides out of the cabinet 1, the clamping block 22 moves synchronously with the overlap block 12.

[0021] In the existing intelligent AC low-voltage switchgear for power distribution, there are differences in the structural settings of the low-voltage switchgear depending on the different uses. They are classified according to the opening method, and the common ones are single-door or double-door types. In order to improve the efficiency of maintenance and the reasonable arrangement of electrical components, the existing low-voltage switchgear adopts a pull-out structure, that is, a plurality of pull-out modules 11 that can be pulled out are arranged on the cabinet body 1, and different electronic components can be placed in each pull-out module 11, and each pull-out module 11 adopts a frame-type hollow structure, which ensures that the temperature generated by the electronic components during operation can be discharged in time. There are two types of existing withdrawable low-voltage switch cabinets. One is that there is no mutual isolation between all the withdrawable modules 11. This type of low-voltage switch cabinet has good heat dissipation. However, when a single withdrawable module 11 is repaired, due to the lack of isolation between adjacent withdrawable modules 11, although the withdrawable module 11 is automatically powered off due to being pulled out during maintenance, other withdrawable modules 11 adjacent to the withdrawable module 11 are still powered on, and workers are prone to accidental electric shock during maintenance; the second is that isolation is provided between all the withdrawable modules 11. Before and after the withdrawable module 11 is pulled out, the adjacent withdrawable modules 11 and the withdrawable module 11 are in a state of mutual isolation, which avoids electric shock to workers during maintenance, but the heat dissipation performance of this type of low-voltage switch cabinet is poor.

[0022] In order to avoid the above situation, the structure of the existing withdrawable low-voltage switch cabinet is redesigned so that the withdrawable low-voltage switch cabinet can ensure that each withdrawable module 11 can fully dissipate heat during operation, and at the same time ensure that when a single withdrawable module 11 is repaired, other adjacent withdrawable modules 11 are isolated from the withdrawable module 11, thereby avoiding electric shock to the staff during maintenance. The specific structure and working process of the low-voltage switch cabinet of the present invention are as follows: During daily use, the air in the withdrawable modules 11 in the cabinet 1 is in a state of mutual communication, and a cooling fan 14 is provided in the cabinet 1. When the cooling fan 14 dissipates heat in the cabinet 1, all the withdrawable modules 11 can be cooled by the cooling fan 14. At this time, the insulating film 21 is rolled up in the winder 2, and all the withdrawable modules 11 are retracted in the cabinet 1. The clamping block 22 arranged on the insulating film 21 is in contact with the overlapping block 12 on the withdrawable module 11, and the insulating film 21 does not isolate the two adjacent withdrawable modules 11. When an electronic component in one of the withdrawal modules 11 fails, the staff will withdraw the withdrawal module 11. When the withdrawal module 11 is withdrawn, it moves in the horizontal direction. The withdrawal module 11 pulls the clamping block 22 through the overlapping block 12. The clamping block 22 moves synchronously with the overlapping block 12 in the horizontal direction. The overlapping block 12 withdraws the insulating film 21 wound in the reel 2. Since the reel 2 is provided at the upper and lower parts of each withdrawal module 11, when the withdrawal module 11 is withdrawn, the withdrawal module 11 is pulled out. The insulating films 21 in the two reels 2 at the upper and lower parts of the block 11 are both pulled out. The pulled-out insulating films 21 lie horizontally between the pull-out module 11 and the adjacent pull-out module 11. Although the other pull-out modules 11 adjacent to the pull-out module 11 are in a powered state at this time, the insulating film 21 has isolated the pull-out module 11 from the two adjacent upper and lower pull-out modules 11, ensuring that the staff will not get electric shock during the maintenance of the pull-out module 11.

[0023] By arranging a lap block 12 at the upper and lower parts of each extraction module 11, and arranging a reel 2 with an insulating film 21 wound therein on one side of each lap block 12, a coil spring capable of automatically reeling the insulating film 21 is arranged in the reel 2, and a clamping block 22 capable of synchronously moving with the lap block 12 is fixedly arranged on one end of the insulating film 21 extending from the reel 2. When the extraction module 11 is in the unextracted state, the insulating film 21 is reeled in the reel 2, and the extraction module 11 and its adjacent extraction module 11 are in a state of being unextracted. The modules 11 are interconnected, and the cooling fan 14 can dissipate heat for all the withdrawable modules 11. When the withdrawable module 11 is withdrawn, the withdrawable module 11 pulls out the insulating films 21 on its upper and lower sides. As the withdrawable module 11 is withdrawn, the insulating film 21 isolates the other withdrawable modules 11 adjacent to the withdrawable module 11, thereby preventing accidental electric shock to the staff during maintenance. At the same time, it also ensures that the withdrawable modules 11 in the low-voltage switch cabinet can dissipate heat normally when the low-voltage switch cabinet is in normal operation. At the same time, the clamping block 22 is in contact with the lap block 12, and the clamping block 22 is driven to move synchronously by the lap block 12, rather than directly fixing the insulating film 21 on the withdrawable module 11, which facilitates the subsequent replacement of the insulating film 21.

[0024] Reference Figure 2 and Fig.10 A power supply unit 3 for supplying power to the pull-out module 11 is arranged in the cabinet 1. The power supply unit 3 includes a power supply bar 32 vertically fixed on the inner wall of the cabinet 1, and a power supply slot 31 for plugging and cooperating with the power supply bar 32 is arranged on the side wall of the pull-out module 11.

[0025] When the pull-out module 11 is fully inserted into the cabinet 1, the power supply slot 31 provided on the pull-out module 11 is electrically connected to the power supply bar 32 provided on the cabinet 1, and the power supply slot 31 and the power supply bar 32 are slidably matched. When the pull-out module 11 is pulled out, the power supply slot 31 and the power supply bar 32 are disconnected, and the pulled-out module 11 is automatically powered off.

[0026] Reference Figure 7 and Figure 8 A pop-up unit 4 capable of popping out the pull-out module 11 is arranged on the side of the pull-out module 11 facing the cabinet 1. The pop-up unit 4 includes a telescopic tube 41. One end of the telescopic tube 41 is fixedly arranged on the pull-out module 11. When the telescopic tube 41 is extended, the pull-out module 11 pops out.

[0027] Reference Figure 7 , Fig. 9 , Fig.11 and Fig.13A liquid supply pipe 43 is provided on the end of the telescopic tube 41 away from the extraction module 11. Hydraulic oil is filled in both the liquid supply pipe 43 and the telescopic tube 41. A switch valve 44 is provided on the liquid supply pipe 43. A pressure unit 42 for pressing the hydraulic oil into the liquid supply pipe 43 is provided on the end of the liquid supply pipe 43 away from the telescopic tube 41.

[0028] Reference Figure 2 and Figure 4 The pressure unit 42 includes a main pipe 421 vertically arranged in the cabinet 1, the main pipe 421 is connected to the liquid supply pipe 43, an oil tank 422 filled with hydraulic oil is fixedly arranged on the upper part of the main pipe 421, and a gravity block 423 is arranged in the oil tank 422 for movement in the vertical direction, and the gravity block 423 provides pressure to the hydraulic oil in the oil tank 422.

[0029] Reference Figure 5-Figure 7 A trigger unit 5 for controlling the switch valve 44 is arranged on the cabinet 1, and the trigger unit 5 includes a gear 51 fixedly connected to the valve core of the switch valve 44, and a rack 52 is arranged on one side of the gear 51 for movement in the horizontal direction, and the rack 52 and the gear 51 are meshed with each other, and a pressing rod 53 is fixedly arranged at the end of the rack 52 along the extension direction of the rack 52, and the pressing rod 53 passes through the cabinet 1 and slidably cooperates with the cabinet 1.

[0030] A button 54 is fixedly provided at the end of the pressing rod 53 located on the outside of the cabinet 1. When the pull-out module 11 is in normal operation, the switch valve 44 is in a closed state. Although the gravity block 423 generates vertical downward pressure on the hydraulic oil in the oil tank 422, the hydraulic oil in the oil tank 422 will not flow into the main line 421. When it is necessary to pop out the pull-out module 11, the staff presses the button 54, and the button 54 drives the pressing rod 53 to slide into the cabinet 1, and the pressing rod 53 drives the rack 52 to move, thereby causing the gear 51 to rotate, and the rotating gear 51 rotates the valve core of the switch valve 44, so that the valve core of the switch valve 44 is opened. At this time, the gravity block 423 in the oil tank 422 acts on the hydraulic oil in the oil tank 422, so that the hydraulic oil in the oil tank 422 is pressed into the main line 421. Since the switch valve 44 is in an open state at this time, the main line 421 discharges the hydraulic oil into the liquid supply pipe 43, and the hydraulic oil finally flows into the telescopic tube 41 through the liquid supply pipe 43, so that the telescopic tube 41 is extended. When the telescopic tube 41 is extended, the pull-out module 11 originally located in the cabinet 1 is pushed out by the telescopic tube 41.

[0031] Reference Figure 5 : A limit plate 55 is fixedly arranged on the side wall of the pressing rod 53, and the limit plate 55 is located inside the cabinet 1. There is a gap between the limit plate 55 and the side wall of the cabinet 1. A spring 56 is arranged in the gap along the extension direction of the pressing rod 53, and the two ends of the spring 56 are fixedly connected to the limit plate 55 and the inner wall of the cabinet 1 respectively.

[0032] When the button 54 presses the pressing rod 53, the limit plate 55 moves synchronously with the pressing rod 53, the limit plate 55 stretches the spring 56, and then the rack 52 drives the gear 51 to rotate, and the rotating gear 51 opens the valve core of the switch valve 44, and then the gravity block 423 presses the hydraulic oil in the oil tank 422 into the main pipeline 421 by its own weight, and the extraction module 11 corresponding to the button 54 is completely ejected by the extended telescopic tube 41. After the extraction module 11 is completely ejected, the staff releases the button 54, and the stretched spring 56 drives the limit plate 55 to reset, and the rack 52 drives the gear 51 to rotate in the opposite direction, so that the valve core of the switch valve 44 is closed. After the switch valve 44 is closed, the hydraulic oil in the telescopic tube 41 will no longer flow, and the switch valve 44 locks the telescopic tube 41, so that the telescopic tube 41 is maintained at the current length, thereby ensuring that the ejected extraction module 11 will not slide randomly in the horizontal direction when being inspected.

[0033] Reference Figure 1 , Figure 2 , Figure 6 and Fig. 9 A hoist 45 is arranged above the gravity block 423, and a traction rope is wound inside the hoist 45. One end of the traction rope is fixedly connected to the gravity block 423. A return pipe 46 is connected in parallel to one side of the liquid supply pipe 43. A one-way valve 47 is arranged on the return pipe 46. The one-way valve 47 allows the hydraulic oil in the telescopic tube 41 to flow into the main pipeline 421. The opening pressure of the one-way valve 47 is between 0.2-0.6Mpa.

[0034] A trigger button 48 for activating the hoist 45 is provided on the side wall of the cabinet 1. After the trigger button 48 is pressed, the hoist 45 starts to start. At this time, the hoist 45 reels the traction rope, so that the gravity block 423 is lifted, and the hydraulic oil in the main line 421 is sucked into the oil tank 422. At this time, a negative pressure is formed in the main line 421, and the hydraulic oil in the telescopic tube 41 can flow into the main line 421 through the one-way valve 47. The traction rope is driven up by the hoist 45, so that the pop-up extraction module 11 can retract into the cabinet 1 by itself after the maintenance is completed. After the hoist 45 completes the rewinding of the traction rope, the hoist 45 releases a part of the traction rope, so that the gravity block 423 can produce a pressure effect on the hydraulic oil in the oil tank 422, thereby ensuring that when the switch valve 44 corresponding to one of the extraction modules 11 is opened, the telescopic tube 41 can quickly extend and eject the extraction module 11. At the same time, the opening pressure of the one-way valve 47 is set between 0.2-0.6Mpa, and under normal circumstances, the opening pressure of the one-way valve 47 is set between 0.02-0.2Mpa, which ensures that the pop-up extraction module 11 is not prone to sliding even when subjected to horizontal thrust during maintenance.

[0035] Reference Figure 5-Figure 8 A deceleration unit 6 is arranged on one side of the pull-out module 11, and the deceleration unit 6 includes a deceleration rod 61 fixedly arranged on one side of the pull-out module 11 along the moving direction of the pull-out module 11, and a deceleration sleeve 62 plugged with the deceleration rod 61 is fixedly arranged on the inner wall of the cabinet 1 along the extending direction of the deceleration rod 61, and an exhaust hole 621 is opened on the deceleration sleeve 62, and the diameter of the exhaust hole 621 is smaller than the inner diameter of the deceleration sleeve 62.

[0036] When the pull-out module 11 is ejected by the ejection unit 4, the pull-out module 11 drives the deceleration rod 61 to move synchronously. The deceleration rod 61 starts to decelerate when it slides into the deceleration sleeve 62. The air in the deceleration sleeve 62 is discharged through the exhaust hole 621. The exhaust hole 621 has an overflow effect on the air in the deceleration sleeve 62, thereby achieving the effect of decelerating the ejected pull-out module 11.

[0037] Reference Figure 1-Figure 13 : The end face of the pull-out module 11 located on the outside of the cabinet 1 is a plane, that is, the end of the pull-out module 11 located on the outside of the cabinet 1 is not provided with a handle for pulling out, which prevents the staff from unconsciously putting their hands on the handle due to maintenance habits. If the electronic components in the pull-out module 11 are short-circuited and the pull-out module 11 is energized, the staff may easily get an electric shock.

[0038] A partition plate 13 is fixedly disposed horizontally between two adjacent drawer modules 11, and a guide rail 131 is fixedly disposed horizontally on the partition plate 13 for guiding the clamping block 22 to move in the horizontal direction. A plurality of heat dissipation slots 132 are evenly disposed on the partition plate 13, so that the partition plate 13 provides a fixed position for the guide rail 131 without affecting the normal heat dissipation of the drawer module 11. A heat dissipation fan 14 is disposed at the bottom of the cabinet 1.

[0039] Working principle: During daily use, the air in the pull-out modules 11 in the cabinet 1 is in a state of interconnection. A cooling fan 14 is provided in the cabinet 1. When the cooling fan 14 dissipates heat in the cabinet 1, all the pull-out modules 11 can be cooled by the cooling fan 14. At this time, the insulating film 21 is rolled up in the winder 2, and all the pull-out modules 11 are retracted in the cabinet 1. The clamping block 22 provided on the insulating film 21 is in contact with the overlapping block 12 on the pull-out module 11, and the insulating film 21 does not isolate two adjacent pull-out modules 11. When an electronic component in one of the withdrawal modules 11 fails, the staff will withdraw the withdrawal module 11. When the withdrawal module 11 is withdrawn, it moves in the horizontal direction. The withdrawal module 11 pulls the clamping block 22 through the overlapping block 12. The clamping block 22 moves synchronously with the overlapping block 12 in the horizontal direction. The overlapping block 12 withdraws the insulating film 21 wound in the reel 2. Since the reel 2 is provided at the upper and lower parts of each withdrawal module 11, when the withdrawal module 11 is withdrawn, the withdrawal module 11 is pulled out. The insulating films 21 in the two reels 2 at the upper and lower parts of the block 11 are both pulled out. The pulled-out insulating films 21 lie horizontally between the pull-out module 11 and the adjacent pull-out module 11. Although the other pull-out modules 11 adjacent to the pull-out module 11 are in a powered state at this time, the insulating film 21 has isolated the pull-out module 11 from the two adjacent upper and lower pull-out modules 11, ensuring that the staff will not get electric shock during the maintenance of the pull-out module 11.

[0040] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the protection scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A power distribution intelligent AC low-voltage switch cabinet, comprising a cabinet body (1) and draw-out modules (11) evenly arranged in the cabinet body (1) along the height direction of the cabinet body (1); characterized in that: A lap block (12) is fixedly arranged at the upper and lower parts of the withdrawal module (11), respectively. A reel (2) is arranged on one side of each lap block (12) facing the inside of the cabinet (1). An insulating film (21) is wound inside the reel (2). A coil spring for providing a reeling force to the insulating film (21) is also arranged inside the reel (2). One end of the insulating film (21) extends from the reel (2). A clamping block (22) is fixedly arranged on the end of the insulating film (21) extending from the reel (2). The clamping block (22) is located on one side of the lap block (12) and contacts the lap block (12). When the withdrawal module (11) slides out of the cabinet (1), the clamping block (22) moves synchronously with the lap block (12).

2. The intelligent AC low-voltage switch cabinet for power distribution according to claim 1, characterized in that: A power supply unit (3) for supplying power to the drawer module (11) is arranged in the cabinet (1), the power supply unit (3) comprising a power supply bar (32) vertically fixedly arranged on the inner wall of the cabinet (1), and a power supply slot (31) for plugging and cooperating with the power supply bar (32) is arranged on the side wall of the drawer module (11).

3. The intelligent AC low-voltage switch cabinet for power distribution according to claim 1, characterized in that: A pop-up unit (4) capable of popping out the pull-out module (11) is provided on a side of the pull-out module (11) facing the cabinet (1). The pop-up unit (4) comprises a telescopic tube (41). One end of the telescopic tube (41) is fixedly arranged on the pull-out module (11). When the telescopic tube (41) is extended, the pull-out module (11) pops out.

4. The intelligent AC low-voltage switch cabinet for power distribution according to claim 3, characterized in that: A liquid supply pipe (43) is provided at one end of the telescopic pipe (41) away from the extraction module (11); hydraulic oil is filled into the liquid supply pipe (43) and the telescopic pipe (41); a switch valve (44) is provided on the liquid supply pipe (43); and a pressure unit (42) for pressing the hydraulic oil into the liquid supply pipe (43) is provided at one end of the liquid supply pipe (43) away from the telescopic pipe (41).

5. The intelligent AC low-voltage switch cabinet for power distribution according to claim 4, characterized in that: The pressure unit (42) comprises a main pipe (421) vertically arranged in the cabinet (1); the main pipe (421) and the liquid supply pipe (43) are in communication with each other; an oil tank (422) filled with hydraulic oil is fixedly arranged on the upper part of the main pipe (421); a gravity block (423) is movably arranged in the vertical direction in the oil tank (422); the gravity block (423) provides pressure to the hydraulic oil in the oil tank (422).

6. The intelligent AC low-voltage switch cabinet for power distribution according to claim 4, characterized in that: A trigger unit (5) for controlling the on / off of the on / off valve (44) is arranged on the cabinet (1), the trigger unit (5) comprising a gear (51) fixedly connected to a valve core of the on / off valve (44), a rack (52) being arranged on one side of the gear (51) so as to move in a horizontal direction, the rack (52) and the gear (51) being meshed with each other, a pressing rod (53) being fixedly arranged at the end of the rack (52) along an extension direction of the rack (52), and the pressing rod (53) penetrating the cabinet (1) and slidably cooperating with the cabinet (1).

7. The intelligent AC low-voltage switch cabinet for power distribution according to claim 6, characterized in that: A limit plate (55) is fixedly arranged on the side wall of the pressing rod (53). The limit plate (55) is located inside the cabinet (1). A gap exists between the limit plate (55) and the side wall of the cabinet (1). A spring (56) is arranged in the gap along the extension direction of the pressing rod (53). Two ends of the spring (56) are respectively fixedly connected to the limit plate (55) and the inner wall of the cabinet (1).

8. The intelligent AC low-voltage switch cabinet for power distribution according to claim 5, characterized in that: A hoist (45) is arranged above the gravity block (423), a traction rope is wound inside the hoist (45), one end of the traction rope is fixedly connected to the gravity block (423), a return pipe (46) is connected in parallel to one side of the liquid supply pipe (43), and a one-way valve (47) is arranged on the return pipe (46), and the one-way valve (47) allows the hydraulic oil in the telescopic pipe (41) to flow into the main pipe (421).

9. The intelligent AC low-voltage switch cabinet for power distribution according to claim 1, characterized in that: A deceleration unit (6) is arranged on one side of the drawer module (11), the deceleration unit (6) comprising a deceleration rod (61) fixedly arranged on one side of the drawer module (11) along the moving direction of the drawer module (11), a deceleration sleeve (62) pluggably engaged with the deceleration rod (61) is fixedly arranged on the inner wall of the cabinet (1) along the extending direction of the deceleration rod (61), the deceleration sleeve (62) being provided with an exhaust hole (621), the diameter of the exhaust hole (621) being smaller than the inner diameter of the deceleration sleeve (62).

10. The intelligent AC low-voltage switch cabinet for power distribution according to claim 1, characterized in that: The end surface of the draw-out module (11) located at one end outside the cabinet (1) is a plane.

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