Bus connection optimizing device for low-voltage standardized switch cabinet

Abstract

The invention discloses a bus connection optimization device for a low-voltage standardized switch cabinet, and belongs to the technical field of power equipment. The connection optimization device comprises a junction box, a through groove which is arranged on the junction box and is used for a bus to pass through, and abutting pieces which are symmetrically arranged in the through groove and are used for fixing a bus copper bar hole on the junction box, the screw rod is arranged on the abutting piece; and the driving assembly is arranged on the junction box, is connected with the screw rod and is used for moving and locking the screw rod. According to the bus connection optimizing device for the low-voltage standardized switch cabinet, through the combined design of the air bag and the air pump assembly, when the bus expands due to heating, the air bag can be telescopic to buffer the expansive force of the bus, and the problem of loose connection of bolts and bus copper bar holes caused by the expansion due to heating in the prior art is effectively solved; therefore, the connection stability between the bus and the junction box is improved, and the reliability of power transmission is ensured.

Description

Technical Field

[0001] This application relates to the technical field of power equipment, and particularly to an optimized device for the bus connection of low-voltage standardized switchgear cabinets. Background Art

[0002] In modern power systems, low-voltage standardized switchgear cabinets, as key equipment for power distribution and control, their stable operation is crucial for ensuring the reliability of power supply. As the main component for transmitting electrical energy inside the switchgear cabinet, the connection quality between the busbar and the junction box directly affects the stability and safety of power transmission. Currently, the traditional connection method for the busbars of low-voltage switchgear cabinets usually uses bolt connection, that is, the busbar copper bars are fixed to the junction box through bolts. However, during long-term operation, the busbars will generate heat due to the passage of current and undergo thermal expansion. Due to the rigid characteristics of bolt connection, it is unable to effectively buffer the expansion force of the busbars, resulting in the connection between the bolts and the holes of the busbar copper bars being prone to gradually loosen. Once the connection becomes loose, it will not only increase the contact resistance, cause overheating, but may even lead to electrical faults, affecting the normal transmission of power.

[0003] Therefore, this application provides an optimized device for the bus connection of low-voltage standardized switchgear cabinets to solve the above problems. Summary of the Invention

[0004] This application provides an optimized device for the bus connection of low-voltage standardized switchgear cabinets, aiming to solve the problems in the background art that the existing busbars of low-voltage switchgear cabinets are connected to the junction box by bolts, which are prone to loosening due to the inability of bolt connection to effectively buffer the expansion force during long-term operation of the busbars, thereby affecting the normal transmission of power.

[0005] To achieve the above object, this application provides the following technical solution: An optimized device for the bus connection of low-voltage standardized switchgear cabinets, including a junction box, a through groove opened on the junction box for the busbar to pass through, abutting members symmetrically arranged in the through groove for fixing the holes of the busbar copper bars on the junction box, a screw rod arranged on the abutting members, and a driving component arranged on the junction box and connected to the screw rod for moving and locking the screw rod; The connection optimization device further includes an airbag arranged on the abutting member for abutting against the inner wall of the hole of the busbar copper bar, and an air pump assembly arranged on the abutting member and connected to the screw rod for expanding or contracting the airbag as the screw rod moves; Filter plates are arranged at both sides of the opening positions corresponding to the through groove on the junction box; The combined design of the airbag and the air pump assembly. When the screw is driven to move by the driving assembly so that the abutting member fixes the busbar copper row hole on the junction box, the airbag can expand synchronously and press against the inner wall of the busbar copper row hole. Due to the elastic characteristics of the airbag, when the busbar expands due to heat, the scalability of the airbag can buffer the expansion force of the busbar, effectively reducing the problem of loosening of the connection between the bolt and the busbar copper row hole caused by the heat expansion of the traditional busbar, thereby improving the connection stability between the busbar and the junction box to ensure the reliability of power transmission. At the same time, the design of the filter plate can reduce the entry of dust and impurities into the connection part of the busbar copper row hole, the abutting member and the screw, avoiding overheating caused by impurity accumulation and further ensuring the normal operation of the device.

[0006] Preferably, in order to fix the busbar, the abutting member includes a conductive block inserted into the busbar copper row hole and a pressing block arranged outside the busbar copper row hole and fixedly connected to the screw for pressing the busbar in the junction box. The airbag is fixedly sleeved outside the conductive block. The combined design of the pressing block and the conductive block only needs to drive the screw to move through the driving assembly, insert the conductive block into the busbar copper row hole, and then make the pressing block press the busbar copper row hole. This design not only improves the installation efficiency but also ensures good contact and conductive performance between the busbar and the junction box.

[0007] Preferably, in order to move the screw, the driving assembly includes a threaded sleeve rotatably connected to the junction box at a position corresponding to the end of the screw away from the pressing block and a knob arranged outside the junction box and fixedly connected to the threaded sleeve. The screw is arranged inside the threaded sleeve, and the screw is threadedly connected to the inside of the threaded sleeve. The knob is directly fixedly connected to the threaded sleeve, and the screw can be driven to move only by manually rotating it to achieve rapid pressing or loosening of the pressing block. Due to the self-locking characteristic of the threaded connection between the threaded sleeve and the screw, when the knob stops rotating, the position of the screw is locked, reducing loosening caused by vibration or external force and improving the connection stability of the busbar.

[0008] Preferably, in order to ensure the stable movement of the screw and prevent the screw from moving out of the threaded sleeve, the driving assembly further includes a guide rod fixedly arranged inside the threaded sleeve corresponding to the screw, a spiral guide groove opened on the outer side of the guide rod, and a sliding rod slidably connected in the spiral guide groove. The inner side of the screw is fixedly connected to the end of the sliding rod away from the spiral guide groove. Through the cooperation of the sliding rod and the spiral guide groove on the guide rod, when the screw is driven to rotate and move by the threaded sleeve, it can only rotate and move linearly along the trajectory of the spiral guide groove, thereby avoiding radial shaking or offset of the screw to ensure the stability during the movement of the screw, making the pressing or loosening operation of the pressing block on the busbar more stable and reliable, and ensuring the connection stability of the busbar. At the same time, through the movement restriction of the sliding rod in the spiral guide groove, the movement range of the screw can be restricted to prevent the screw from rotating and moving out of the threaded sleeve.

[0009] Preferably, in order to realize the inflation or contraction of the airbag, the air pump assembly includes a cylinder fixedly installed on one side of the pressing block close to the screw rod, a piston slidably connected in the cylinder, a fixed rod penetrating through the cylinder and fixedly connected to the piston, a movable rod slidably connected to one end of the fixed rod away from the piston, limiting rings symmetrically and fixedly sleeved on the screw rod, a rotating ring sleeved outside the screw rod and rotatably connected between the two limiting rings, a connecting plate fixedly connected to one side of the rotating ring and fixedly connected to one end of the movable rod away from the fixed rod, and an air pipe fixedly arranged at one end of the cylinder away from the fixed rod and communicated with the airbag. The fixed rod is slidably connected to the cylinder. Through the coordinated work of the fixed rod, piston, movable rod, rotating ring, connecting plate and air pipe, the inflation state of the airbag can be adjusted according to the movement of the screw rod, so that the airbag can better adapt to the abutment with the busbar copper row hole, further improving the stability and reliability of the busbar connection.

[0010] Preferably, in order to ensure the movement of the movable rod and prevent the movable rod from moving away from the fixed rod, a limiting groove is formed on one side of the fixed rod corresponding to the movable rod, a limiting block is fixedly installed on the movable rod, and the limiting block is slidably connected in the limiting groove. The combined design of the limiting groove and the limiting block enables the movable rod to perform corresponding telescopic movements as the screw rod moves, and the limiting block slides in the limiting groove, restricting the movement range of the movable rod to prevent the movable rod from detaching from the fixed rod due to excessive extension or retraction during movement, ensuring the working stability and reliability of the air pump assembly.

[0011] Preferably, in order to facilitate the use of the filter plate, the connection optimization device further includes a transmission component arranged in the junction box and connected to the threaded sleeve, which is used to move the filter plate closer to or farther away from the surface of the busbar as the threaded sleeve rotates. The design of the transmission component allows the filter plate to synchronously cover or move away from the openings on both sides of the through groove while rotating the threaded sleeve to inflate or deflate the airbag, which not only does not affect the installation of the busbar but also facilitates the operator to open the filter plate for maintenance or inspection, making the operation more convenient.

[0012] Preferably, to facilitate the movement of the filter plate, the transmission assembly includes chutes opened at positions corresponding to both sides of the filter plate in the junction box, lead screws rotatably connected in the chutes, connecting frames slidably connected in the lead screws and screwed to the lead screws, synchronous belt pulleys disposed in the junction box and fixedly sleeved on the outer sides of the threaded sleeves and one ends of the lead screws respectively, and a synchronous belt disposed on the two synchronous belt pulleys. The two synchronous belt pulleys are connected by the synchronous belt to transmit power, and the connecting frame is fixedly connected to the side of the filter plate; through the coordinated work of the chute, the lead screw, the connecting frame, the synchronous belt pulley and the synchronous belt, while rotating the threaded sleeve to drive the screw to move, the movement of the filter plate can be synchronously realized without additional power drive, making it more convenient to cover and open between the filter plate and the bus bar.

[0013] Preferably, to ensure the use of the filter plate, an insulating pad for abutting against the surface of the bus bar is fixedly installed on the filter plate; due to the certain elasticity of the insulating pad, with the design of the insulating pad, when the filter plate moves close to the surface of the bus bar, it can ensure that the edge of the filter plate is closely attached to the bus bar, further preventing impurities from entering the bus bar copper row holes, the abutting members and the connection of the screw from the gap between the filter plate and the bus bar. At the same time, the insulating pad has good insulation performance, which can effectively isolate the electrical connection between the bus bar and the filter plate, preventing short - circuit phenomena caused by accidental touch or electrical faults, and ensuring the safety of operators and equipment.

[0014] In the combined design of the air bag and the air pump assembly of the bus bar connection optimization device for the low - voltage standardized switch cabinet, when the screw is driven to move by the driving assembly and the abutting member fixes the bus bar copper row hole on the junction box, the air bag can expand synchronously to abut against the inner wall of the bus bar copper row hole. Due to the elastic characteristics of the air bag, when the bus bar expands due to heat, the expandability of the air bag can buffer the expansion force of the bus bar, effectively reducing the problem of loosening of the connection between the bolt and the bus bar copper row hole caused by the thermal expansion of the bus bar in the traditional way, thereby improving the connection stability between the bus bar and the junction box to ensure the reliability of power transmission; The bus bar connection optimization device for the low - voltage standardized switch cabinet can reduce the entry of dust and impurities into the connections of the bus bar copper row holes, the abutting members and the screws by setting the filter plate, avoiding overheating caused by impurity accumulation, and further ensuring the normal operation of the device; The bus bar connection optimization device for the low - voltage standardized switch cabinet can, by setting the transmission assembly, while rotating the threaded sleeve to expand or contract the air bag, make the filter plate cover the openings on both sides of the through - slot or move away from the openings on both sides of the through - slot synchronously, which not only does not affect the installation of the bus bar, but also facilitates the operator to open the filter plate for maintenance or inspection, making the operation more convenient. Description of the Drawings

[0015] Figure 1 It is a schematic structural diagram of a bus bar connection optimization device for a low - voltage standardized switch cabinet in Embodiment 1; Figure 2 It is a cross-sectional view of an optimized device for bus connection of a low-voltage standardized switch cabinet in Embodiment 1; Figure 3 It is a cross-sectional view of the driving component in Embodiment 1; Figure 4 It is a cross-sectional view of the air pump component in Embodiment 1; Figure 5 It is a schematic structural view of the limiting groove and the limiting block in Embodiment 1; Figure 6 It is a schematic structural view of the transmission component in Embodiment 2; Figure 7 It is a partial schematic structural view of the transmission component in Embodiment 2.

[0016] In the figure: 1. Busbar; 11. Busbar copper row hole; 2. Junction box; 21. Through groove; 3. Contact member; 31. Pressing block; 32. Conductive block; 4. Screw; 5. Driving component; 51. Threaded sleeve; 52. Knob; 53. Guide rod; 54. Spiral guide groove; 55. Slide rod; 6. Airbag; 7. Air pump component; 71. Air cylinder; 72. Piston; 73. Fixed rod; 731. Limiting groove; 74. Movable rod; 741. Limiting block; 75. Limiting ring; 76. Rotating ring; 77. Connecting plate; 78. Air pipe 8. Filter plate; 9. Transmission component; 91. Synchronous belt pulley; 92. Synchronous belt; 93. Lead screw; 94. Connecting frame; 95. Slide groove. Detailed implementation manners

[0017] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0018] Embodiment 1 This embodiment provides an optimized device for bus connection of a low-voltage standardized switch cabinet, as Figures 1-5As shown in the figure, the connection optimization device includes a junction box 2, a through groove 21 opened on the junction box 2 for the bus bar 1 to penetrate, abutting members 3 symmetrically arranged in the through groove 21 for fixing the bus bar copper row hole 11 on the junction box 2, a screw rod 4 arranged on the abutting member 3, and a driving assembly 5 arranged on the junction box 2 and connected to the screw rod 4 for moving and locking the screw rod 4; the connection optimization device further includes an air bag 6 arranged on the abutting member 3 for abutting against the inner wall of the bus bar copper row hole 11, and an air pump assembly 7 arranged on the abutting member 3 and connected to the screw rod 4 for expanding or contracting the air bag 6 as the screw rod 4 moves; filter plates 8 are arranged at both opening positions of the junction box 2 corresponding to both sides of the through groove 21.

[0019] Among them, in order to fix the bus bar 1, the abutting member 3 includes a conductive block 32 inserted into the bus bar copper row hole 11 and a pressing block 31 arranged outside the bus bar copper row hole 11 and fixedly connected to the screw rod 4 for pressing the bus bar 1 in the junction box 2, and the air bag 6 is fixedly sleeved outside the conductive block 32; the combined design of the pressing block 31 and the conductive block 32 only needs to drive the screw rod 4 to move through the driving assembly 5, insert the conductive block 32 into the bus bar copper row hole 11, and then make the pressing block 31 press the bus bar copper row hole 11. This design not only improves the installation efficiency, but also ensures good contact and conductive performance between the bus bar 1 and the junction box 2. At the same time, the diameter of the end of the conductive block 32 far from the pressing block 31 is larger than the diameter of the end close to the pressing block 31, and this end can directly contact the inner wall of the bus bar copper row hole 11 to ensure the conductive performance.

[0020] It should be noted that a graphene conductive coating is coated on the side of the air bag 6 close to the inner wall of the bus bar copper row hole 11, which greatly increases the conductive contact area between the abutting member 3 and the bus bar copper row hole 11, further ensures the conductive performance of the abutting member 3, and guarantees stable power transmission between the bus bar 1 and the junction box 2.

[0021] During use, before installation, the junction box 2 can be fixed to the position corresponding to the connecting busbar 1 of the low-voltage switchgear through bolts. When it is necessary to install the busbar 1 on the junction box 2, the operator first places the busbar copper row hole 11 in the through groove 21, and operates the driving assembly 5 to drive the screw rod 4 to rotate and move towards the direction close to the busbar copper row hole 11. Since the screw rod 4 is connected to the pressing block 31, and a conductive block 32 for inserting into the busbar copper row hole 11 is connected to the pressing block 31, as the screw rod 4 rotates and moves, the conductive block 32 will move synchronously and insert into the busbar copper row hole 11. After the conductive block 32 is inserted into the busbar copper row hole 11, continue to operate the driving assembly 5 to make the screw rod 4 drive the pressing block 31 to continue to move and squeeze the position of the busbar copper row hole 11, so that the busbar 1 can be fixed on the junction box 2. Since the air pump assembly 7 is connected to the screw rod 4, when the conductive block 32 is inserted into the busbar copper row hole 11 and the screw rod 4 is continuously operated to drive the pressing block 31 to press the position of the busbar copper row hole 11, the airbag 6 outside the conductive block 32 can be inflated synchronously, so that the airbag 6 expands until the airbag 6 expands and abuts against the inner wall of the busbar copper row hole 11 to further improve the fixation of the abutting member 3 on the busbar 1. However, during the operation of the switchgear, the busbar 1 will expand due to the heat generated by the current passing through. At this time, the airbag 6 with elastic characteristics plays an important role. It can expand and contract according to the expansion degree of the busbar 1 heated, buffering the expansion force of the busbar 1, thus reducing the problem that the connection between the bolt and the busbar copper row hole 11 becomes loose due to the thermal expansion of the busbar in the traditional connection method, improving the stability of the connection between the busbar 1 and the junction box 2, and further ensuring the reliability of power transmission. And when the airbag 6 expands to fix the busbar 1, the filter plate 8 will cover the two open positions on both sides of the through groove 21 to reduce the entry of dust and impurities into the connection between the busbar copper row hole 11, the abutting member 3 and the screw rod 4, avoiding overheating caused by impurity accumulation and ensuring the normal operation of the device.

[0022] Specifically, the driving assembly 5 includes a threaded sleeve 51 rotatably connected to the position of the junction box 2 corresponding to the end of the screw rod 4 away from the pressing block 31, and a knob 52 arranged outside the junction box 2 and fixedly connected to the threaded sleeve 51. The screw rod 4 is arranged in the threaded sleeve 51, and the screw rod 4 is internally screwed with the threaded sleeve 51. The driving assembly 5 further includes a guide rod 53 fixedly arranged inside the threaded sleeve 51 corresponding to the inside of the screw rod 4, a spiral guide groove 54 opened on the outer side of the guide rod 53, and a sliding rod 55 slidably connected in the spiral guide groove 54. The inner side of the screw rod 4 is fixedly connected to the end of the sliding rod 55 away from the spiral guide groove 54; When the bus bar 1 needs to be installed into the junction box 2, the operator rotates the knob 52 located outside the junction box 2. Since the knob 52 is fixedly connected to the threaded sleeve 51, the rotation of the knob 52 will drive the threaded sleeve 51 to rotate on the junction box 2. Also, since the screw rod 4 is internally screwed with the threaded sleeve 51, according to the principle of screw drive, the rotation of the threaded sleeve 51 will drive the screw rod 4 to move linearly along the axial direction. During the movement of the screw rod 4, the slide bar 55 fixedly connected to the inner side of the screw rod 4 will slide in the spiral guide groove 54 on the outer side of the guide bar 53. This cooperation enables the screw rod 4 to only rotate and move linearly along the trajectory of the spiral guide groove 54, avoiding radial shaking or deviation of the screw rod 4 and ensuring the stability of the movement process of the screw rod 4. After that, as the screw rod 4 moves stably, the conductive block 32 in the abutting member 3 will smoothly insert into the bus bar copper row hole 11. The diameter of the end of the conductive block 32 far from the pressing block 31 is larger, which can make good contact with the inner wall of the bus bar copper row hole 11 to ensure the conductive performance. At the same time, after the conductive block 32 is inserted into the bus bar copper row hole 11, when the threaded sleeve 51 is continuously rotated to drive the screw rod 4 to rotate and move further, the pressing block 31 will further press the bus bar 1. Finally, through the self-locking of the thread between the threaded sleeve 51 and the screw rod 4, after the rotation of the threaded sleeve 51 is paused, the bus bar 1 can be firmly fixed in the junction box 2. On the contrary, by operating the knob 52 in the reverse direction to make the threaded sleeve 51 rotate in the reverse direction, the screw rod 4 and the abutting member 3 can be driven to move away from the bus bar copper row hole 11, and thus the fixation of the bus bar 1 can be released.

[0023] Furthermore, the air pump assembly 7 includes an air cylinder 71 fixedly installed on the side of the pressing block 31 close to the screw rod 4, a piston 72 slidably connected in the air cylinder 71, a fixed rod 73 passing through the air cylinder 71 and fixedly connected to the piston 72, a movable rod 74 slidably connected to the end of the fixed rod 73 far from the piston 72, a limiting ring 75 symmetrically and fixedly sleeved on the screw rod 4, a rotating ring 76 sleeved on the outer side of the screw rod 4 and rotatably connected between the two limiting rings 75, a connecting plate 77 fixedly connected to one side of the rotating ring 76 and fixedly connected to the end of the movable rod 74 far from the fixed rod 73, and an air pipe 78 fixedly arranged at the end of the air cylinder 71 far from the fixed rod 73 and communicating with the air bag 6. The fixed rod 73 is slidably connected to the air cylinder 71; When the busbar 1 is being installed and fixed, the operator turns the knob 52 in the drive assembly 5 to drive the threaded sleeve 51 to rotate, thereby rotating the screw rod 4 and driving the conductive block 32 to insert into the busbar copper bar hole 11. Due to the effect of the limiting ring 75 symmetrically fixedly sleeved on the screw rod 4, the rotating ring 76 sleeved on the outside of the screw rod 4 and rotatably connected between the two limiting rings 75 will rotate with the movement of the screw rod 4. At the same time, the screw 4 drives the pressing block 31 to move close to the busbar copper bar hole 11, and also drives the limiting ring 75 to move synchronously to a position close to the busbar copper bar hole 11. At this time, through the limiting position of the limiting ring 75, it will synchronously push the connecting plate 77 connected to the rotating ring 76 to move. As the connecting plate 77 moves, the connecting plate 77 will first push the movable rod 74 to move and shrink in the fixed rod 73. When the screw 4 drives the conductive block 32 to be completely inserted into the busbar copper bar hole 11, the movable rod 74 will move to the bottom in the fixed rod 73, and then the screw 4 will continue to rotate and move to drive the pressure block 31 to move, so as to press the position of the busbar copper bar hole 11 against the junction box 2. Similarly, through the limiting of the limiting ring 75 and the connection of the rotating ring 76, the screw 4 will synchronously drive the connecting plate 77 to continue to push, and then the connecting plate 77 will push the fixed rod 73 to move on the air cylinder 71 through the connection of the movable rod 74. As the fixed rod 73 moves, it will push the piston 72 in the air cylinder 71 to the side close to the air pipe 78. The gas in the air cylinder 71 is compressed and transported to the air bag 6 through the air pipe 78 fixedly arranged at the end of the air cylinder 71 away from the fixing rod 73 and connected to the air bag 6, so that the air bag 6 expands. The expanded air bag 6 is tightly against the inner wall of the busbar copper bar hole 11, so as to enhance the fixing effect of the busbar copper bar hole 11, and make the connection between the busbar 1 and the junction box 2 more stable and reliable. Conversely, when the busbar 1 needs to be disassembled, the operator reversely rotates the knob 52 in the drive assembly 5 to move the screw rod 4 in the reverse direction. Similarly, through the limiting of the limiting ring 75 and the connection of the rotating ring 76, the screw rod 4 will synchronously drive the connecting plate 77 to move in the reverse direction. In the process of reverse movement, the screw rod 4 will first Drive the pressure block 31 away from the busbar copper bar hole 11, and release the pressure block 31 from the busbar copper bar hole 11. During this process, the connecting plate 77 will reversely pull the movable rod 74 to stretch in the fixed rod 73. As the screw rod 4 continues to move in the opposite direction, the pressure block 31 will drive the conductive block 32 to move away from the busbar copper bar hole 11. At the same time, after the connecting plate 77 drives the movable rod 74 to stretch into place in the fixed rod 73, it will continue to pull the fixed rod 73 to move in the opposite direction. As the fixed rod 73 moves in the opposite direction, the piston 72 will move in the air cylinder 71 to the side away from the air pipe 78. At this time, the air pressure in the air cylinder 71 decreases, and the gas in the airbag 6 flows back to the air cylinder 71 through the air pipe 78, and the airbag 6 shrinks.

[0024] In addition, to ensure the movement of the movable rod 74 and prevent the movable rod 74 from moving out of the fixed rod 73, a limiting groove 731 is formed on one side of the fixed rod 73 corresponding to the movable rod 74. A limiting block 741 is fixedly installed on the movable rod 74, and the limiting block 741 is slidably connected in the limiting groove 731. The combined design of the limiting groove 731 and the limiting block 741 enables the movable rod 74 to perform corresponding telescopic movements as the screw rod 4 moves. The limiting block 741 slides in the limiting groove 731, restricting the movement range of the movable rod 74 to prevent the movable rod 74 from detaching from the fixed rod 73 due to excessive extension or retraction during movement, ensuring the working stability and reliability of the air pump assembly 7.

[0025] Embodiment 2 Different from Embodiment 1, as Figures 6-7 shown, for the convenience of using the filter plate 8, the connection optimization device further includes a transmission assembly 9 disposed in the junction box 2 and connected to the threaded sleeve 51 for moving the filter plate 8 closer to or farther from the surface of the bus bar 1 as the threaded sleeve 51 rotates. The design of the transmission assembly 9 allows the filter plate 8 to simultaneously cover or move away from the openings on both sides of the through groove 21 while the airbag 6 expands or contracts when the threaded sleeve 51 is rotated, which not only does not affect the installation of the bus bar 1 but also facilitates the operator to open the filter plate 8 for maintenance or inspection, making the operation more convenient.

[0026] Furthermore, the transmission assembly 9 includes sliding grooves 95 formed on both sides of the filter plate 8 in the junction box 2, a lead screw 93 rotatably connected in the sliding grooves 95, a connecting frame 94 slidably connected in the lead screw 93 and screwed to the lead screw 93, synchronous belt pulleys 91 disposed in the junction box 2 and fixedly sleeved on the outer side of the threaded sleeve 51 and one end of the lead screw 93 respectively, and a synchronous belt 92 disposed on the two synchronous belt pulleys 91. The two synchronous belt pulleys 91 are connected by the synchronous belt 92 to transmit power, and the connecting frame 94 is fixedly connected to the side of the filter plate 8; When performing the installation and fixation operation of the busbar 1, the operator rotates the knob 52 in the drive assembly 5. When the knob 52 drives the threaded sleeve 51 fixedly connected thereto to rotate, since the synchronous pulley 91 is fixedly sleeved on the outer side of the threaded sleeve 51, the rotation of the threaded sleeve 51 will cause the synchronous pulley 91 to rotate together. Then, the two synchronous pulleys 91 are connected by a synchronous belt 92 and transmit power. Therefore, another synchronous pulley 91 fixedly sleeved on one end of the lead screw 93 will also rotate driven by the synchronous belt 92, thereby causing the lead screw 93 to rotate in the chute 95. Also, since the connecting frame 94 is slidably connected to the lead screw 93 and is screwed to the lead screw 93, according to the principle of screw drive, the rotation of the lead screw 93 will cause the connecting frame 94 to move linearly along the lead screw 93. And the connecting frame 94 is fixedly connected to the side of the filter plate 8. Therefore, the movement of the connecting frame 94 will drive the filter plate 8 to move. When the screw 4 moves so that the abutting member 3 fixes the busbar 1 well and the airbag 6 expands and abuts against the inner wall of the busbar copper row hole 11, the filter plate 8 will move to a position covering the openings on both sides of the through groove 21 under the action of the transmission assembly 9. At this time, the filter plate 8 can effectively reduce the entry of dust and impurities into the joints of the busbar copper row hole 11, the abutting member 3 and the screw 4, avoid overheating caused by impurity accumulation, ensure the normal operation of the device, and under the limiting action of the sliding range of the chute 95, it can prevent the connecting frame 94 from driving the filter plate 8 to slide out of the junction box 2. Conversely, when it is necessary to disassemble the busbar 1 or perform maintenance on the device, the operator reversely rotates the knob 52 in the drive assembly 5, and the threaded sleeve 51 rotates reversely. Similarly, the reverse rotation of the threaded sleeve 51 will be transmitted to the lead screw 93 through the synchronous pulley 91 and the synchronous belt 92 in sequence, causing the lead screw 93 to rotate reversely. Then, the reverse rotation of the lead screw 93 will cause the connecting frame 94 to move reversely along the lead screw 93, thereby driving the filter plate 8 away from the openings on both sides of the through groove 21. After the filter plate 8 is moved away, the operator can more conveniently perform operations such as maintenance or overhaul on the busbar 1.

[0027] It can be understood that, in order to ensure the use of the filter plate 8, an insulating pad for abutting against the surface of the busbar 1 is fixedly installed on the filter plate 8; due to the certain elasticity of the insulating pad and the design of the insulating pad, when the filter plate 8 moves closer to the surface of the busbar 1, it can ensure that the edge of the filter plate 8 is in close contact with the surface of the busbar 1, further preventing impurities from entering the joints of the busbar copper row hole 11, the abutting member 3 and the screw 4 from the gap between the filter plate 8 and the busbar 1. At the same time, the insulating pad has good insulation performance, can effectively isolate the electrical connection between the busbar 1 and the filter plate 8, and prevent short-circuit phenomena caused by accidental touch or electrical faults, ensuring the safety of the operator and the equipment.

[0028] As described above, it is only the preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application should cover the protection scope of the present application according to the technical solution and its concept of the present application for equivalent replacement or change.

Claims

1. An optimized device for bus connection of low-voltage standardized switchgear, characterized in that: It includes a junction box (2), a through groove (21) opened on the junction box (2) for the bus bar (1) to penetrate, abutting members (3) symmetrically arranged in the through groove (21) for fixing the bus bar copper row holes (11) on the junction box (2), a screw rod (4) arranged on the abutting members (3), and a driving assembly (5) arranged on the junction box (2) and connected to the screw rod (4) for moving and locking the screw rod (4); The connection optimization device further includes an airbag (6) arranged on the abutting member (3) for abutting against the inner wall of the bus bar copper row hole (11), and an air pump assembly (7) arranged on the abutting member (3) and connected to the screw rod (4) for expanding or contracting the airbag (6) as the screw rod (4) moves; Filter plates (8) are arranged at both opening positions of the junction box (2) corresponding to both sides of the through groove (21).

2. The optimized device for bus connection of low-voltage standardized switchgear according to claim 1, wherein: The abutting member (3) includes a conductive block (32) inserted into the bus bar copper row hole (11), and a pressing block (31) arranged outside the bus bar copper row hole (11) and fixedly connected to the screw rod (4) for pressing the bus bar (1) in the junction box (2). The airbag (6) is fixedly sleeved outside the conductive block (32).

3. The low-voltage standardized switchgear bus connection optimization device according to claim 2, characterized in that: The driving assembly (5) includes a threaded sleeve (51) rotatably connected to the junction box (2) at a position corresponding to one end of the screw rod (4) away from the pressing block (31), and a knob (52) arranged outside the junction box (2) and fixedly connected to the threaded sleeve (51). The screw rod (4) is arranged in the threaded sleeve (51), and the screw rod (4) is internally screwed with the threaded sleeve (51).

4. The low-voltage standardized switchgear bus connection optimization device according to claim 3, characterized in that: The driving assembly (5) further includes a guide rod (53) fixedly arranged inside the threaded sleeve (51) corresponding to the inside of the screw rod (4), a spiral guide groove (54) opened on the outer side of the guide rod (53), and a sliding rod (55) slidably connected in the spiral guide groove (54). The inner side of the screw rod (4) is fixedly connected to one end of the sliding rod (55) away from the spiral guide groove (54).

5. The optimized device for bus connection of low-voltage standardized switchgear according to claim 2, characterized in that: The air pump assembly (7) includes an air cylinder (71) fixedly installed on one side of the pressing block (31) close to the screw rod (4), a piston (72) slidably connected in the air cylinder (71), a fixed rod (73) penetrating through the air cylinder (71) and fixedly connected to the piston (72), a movable rod (74) slidably connected to one end of the fixed rod (73) away from the piston (72), limiting rings (75) symmetrically and fixedly sleeved on the screw rod (4), a rotating ring (76) sleeved on the outer side of the screw rod (4) and rotatably connected between the two limiting rings (75), a connecting plate (77) fixedly connected to one side of the rotating ring (76) and fixedly connected to one end of the movable rod (74) away from the fixed rod (73), and an air pipe (78) fixedly arranged at one end of the air cylinder (71) away from the fixed rod (73) and communicated with the airbag (6). The fixed rod (73) is slidably connected to the air cylinder (71).

6. The optimized device for bus connection of low-voltage standardized switchgear according to claim 5, characterized in that: A limiting groove (731) is formed in one side of the fixed rod (73) corresponding to the movable rod (74). A limiting block (741) is fixedly installed on the movable rod (74), and the limiting block (741) is slidably connected in the limiting groove (731).

7. The optimized device for bus connection of low-voltage standardized switchgear according to claim 3, characterized in that: The connection optimization device further includes a transmission assembly (9) disposed in the junction box (2) and connected to the threaded sleeve (51) for moving the filter plate (8) closer to or farther away from the surface of the bus bar (1) as the threaded sleeve (51) rotates.

8. The optimized device for bus connection of low-voltage standardized switchgear according to claim 7, characterized in that: The transmission assembly (9) includes a chute (95) formed in the junction box (2) at positions corresponding to both sides of the filter plate (8), a lead screw (93) rotatably connected in the chute (95), a connection bracket (94) slidably connected in the lead screw (93) and screwed to the lead screw (93), synchronous belt pulleys (91) disposed in the junction box (2) and fixedly sleeved on the outer side of the threaded sleeve (51) and one end of the lead screw (93) respectively, and a synchronous belt (92) disposed on the two synchronous belt pulleys (91). The two synchronous belt pulleys (91) are connected by the synchronous belt (92) to transmit power, and the connection bracket (94) is fixedly connected to the side of the filter plate (8).

9. The low-voltage standardized switchgear bus connection optimization device according to claim 8, characterized in that: An insulating pad for abutting against the surface of the bus bar (1) is fixedly installed on the filter plate (8).

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