An insulation and protection device for terminal blocks of a power distribution cabinet

Abstract

This invention relates to the field of power distribution cabinet protection technology, and provides a power distribution cabinet terminal block insulation isolation protection device, including a protective rail, side sliding groove, side sliding track, locking mechanism, protective module, opening and closing mechanism, and linkage switch mechanism. The protective module consists of a front protective seat, a rear protective seat, a protective cover, a sealing seat, an adsorption component, a side inspection plate, and a top inspection plate. The linkage switch mechanism cooperates with the opening and closing mechanism to realize the synchronous opening and closing of the top inspection port and the side inspection port, simplifying the operation process and improving the efficiency of wiring and disconnection. The protective module not only forms a fully enclosed insulating protective cavity for the terminal block, physically isolating the live terminal block from the internal space of the power distribution cabinet and reducing the risk of accidental electric shock, but also allows for flexible splicing according to the length of the terminal block, adjusting its coverage length to adapt to terminal blocks of different specifications or different numbers of sections, effectively improving the versatility and adaptability of the protection device.

Description

Technical Field

[0001] This invention belongs to the field of power distribution cabinet protection technology, and particularly relates to a power distribution cabinet terminal block insulation isolation protection device. Background Technology

[0002] During the operation of the distribution cabinet, the terminal block, as the core component for modular circuit connection, distribution and transfer, is in a live state. If the terminal block lacks reliable insulation and protection, external dust, moisture and debris can easily enter, which will lead to a decrease in the insulation performance of the terminal block or poor contact, and even cause safety hazards such as short circuits and arcing. In addition, the exposed live terminal block will also increase the risk of accidental electric shock to personnel. Therefore, in order to meet the safety protection requirements of the distribution cabinet, a dedicated insulation and protection device must be configured for the terminal block.

[0003] The existing protective device consists of an upper fixing device, a roll-type isolation strip, and a lower fixing device. The roll-type isolation strip is equipped with a status monitoring module. The upper and lower fixing devices secure the entire protective device to the corresponding position of the terminal block. The rotating shaft inside the roll-type isolation strip is equipped with an automatic reset mechanism. Multiple turns of insulating tape are wound around the outside of the rotating shaft. The end of the outermost insulating tape is connected to the lower fixing device. By stretching or contracting the insulating tape, the terminal block can be covered and protected, and exposed for maintenance can be achieved. However, the existing device still has certain technical defects in practical applications: First, the existing protective devices have a single structure for their inspection ports, which cannot achieve simultaneous opening and closing of multiple inspection ports. During operation, the opening and closing mechanisms of different inspection ports need to be operated separately, which is cumbersome and greatly reduces the efficiency of wiring, disconnection and daily maintenance. Secondly, most existing protective devices are integrated fixed structures, which cannot flexibly adjust the coverage range according to the length, layout position and number of terminal blocks. They are difficult to adapt to terminal blocks of different specifications or different numbers of sections, and have poor versatility and adaptability, thus limiting their application scope.

[0004] Therefore, in view of the above situation, there is an urgent need to develop an insulation and protection device for the terminal blocks of power distribution cabinets to overcome the shortcomings in current practical applications. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an insulation and protection device for the terminal block of a power distribution cabinet to solve the problems mentioned in the background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: An insulation and protection device for terminal blocks of a power distribution cabinet includes a protective rail fixed to the inner wall of the power distribution cabinet. The protective rail is parallel to the terminal rail on which the terminal blocks are installed and is symmetrically arranged on both sides of the terminal rail. A side groove and a side slide are respectively formed on one side of the protective rail along its layout direction. The side slides are symmetrically arranged on both sides of the side groove. A locking mechanism is installed on the side slide. The device also includes: The protective module comprises a front protective seat, a rear protective seat, a protective cover, a sealing seat, an adsorption assembly, a side inspection plate, and a top inspection plate. The front protective seat, rear protective seat, and sealing seat are slidably mounted on two protective rails at both ends and are located outside the terminal block. Each of the front protective seat, rear protective seat, and sealing seat has an adsorption groove on one side for installing the adsorption assembly. One side of the front protective seat is connected to the sealing seat and the adjacent front protective seat via the adsorption assembly to form a whole. The rear protective seat is connected to the sealing seat via the adsorption assembly to form a whole. The protective cover is located on the front protective seat. The protective cover is fixedly connected to the side walls of the base and the rear protective base. The protective cover has symmetrical side inspection ports on both sides and a top inspection port on the front end face of the protective cover. L-shaped slides are provided on the outer sides of the side inspection ports and the top inspection ports. The side inspection plates are slidably installed on the L-shaped slides and cooperate with the side inspection ports. The bottom of the side inspection ports has comb-shaped telescopic seats arranged at equal intervals. The two top inspection plates are symmetrically slidably installed on the L-shaped slides and cooperate with the top inspection ports. Multiple protective modules are spliced ​​together to form a fully enclosed insulating protective cavity for the terminal block. An opening and closing mechanism is installed on the outer end faces of the two top inspection plates; The linkage switch mechanism is installed on the outer wall of the front and rear protective seats. One end of the linkage switch mechanism is connected to two top inspection plates, and the other end of the linkage switch mechanism is connected to the side inspection plates installed on both sides of the protective cover. The linkage switch mechanism and the opening and closing mechanism cooperate to realize the synchronous opening and closing of the top inspection port and the side inspection port.

[0007] As a further technical solution of the present invention, the specification of a single side inspection plate is larger than the specification of a single side inspection port, and the specification of the inspection plate formed by two top inspection plates is larger than the specification of a single top inspection port. Both the side inspection plates and the top inspection plates are made of transparent flame-retardant polycarbonate material.

[0008] As a further technical solution of the present invention, the adsorption assembly includes an adsorption element and a mounting plate. The adsorption element is embedded in the adsorption groove, and the mounting plate is locked in the adsorption groove by screws and squeezes the adsorption element. The outer surface of the mounting plate is embedded in the adsorption groove.

[0009] As a further technical solution of the present invention, sealing strips are installed on the end faces of the front protective seat, the rear protective seat and the sealing seat on the same side as the adsorption component. The sealing strips are arranged around the outside of the adsorption component and are used to seal the splicing gaps between the front protective seat, the rear protective seat and the sealing seat.

[0010] As a further technical solution of the present invention, the opening and closing mechanism includes an opening and closing lever and a limiting component. The opening and closing lever is symmetrically fixed on two top inspection plates on the same protective cover. The limiting component is located on one side of the opening and closing lever and is connected to the two top inspection plates on the same protective cover.

[0011] As a further technical solution of the present invention, the limiting component includes a limiting post, a mounting bracket, a limiting knob, a limiting protrusion, and a limiting seat. The limiting post is parallel to two top inspection plates. One end of the limiting post is rotatably mounted on one top inspection plate via the mounting bracket. The other end of the limiting post is slidably engaged with a limiting seat mounted on the other top inspection plate. A limiting knob is fixed to one end of the limiting post. Limiting protrusions are equidistantly arranged on the outer wall of the limiting post. The limiting seat has a protrusion release groove that cooperates with the limiting protrusions.

[0012] As a further technical solution of the present invention, the linkage switch mechanism includes a linkage component and a return component. The linkage component is symmetrically arranged along the center line of the two top inspection plates and installed on the outer wall of the front and rear protective seats. One end of the linkage component is connected to the top inspection plate, and the other end of the linkage component is connected to the side inspection plate. The two ends of the return component are respectively installed on the two linkage components of the same protective cover.

[0013] As a further technical solution of the present invention, the linkage assembly includes a top rack, a linkage gear, a wheel axle, a wheel frame, and a side rack. The top rack is parallel to the L-shaped slide and one end of it is fixedly connected to the top inspection plate. The other end of the top rack meshes with one side of the linkage gear. The two top racks located on the same protective cover are respectively connected to the two ends of the return assembly. The linkage gear is fixed on the wheel axle. The wheel axle is rotatably mounted on the outer wall of the front and rear protective seats through the wheel frame. The other side of the linkage gear meshes with one end of the side rack, and the other end of the side rack is fixedly connected to the side inspection plate.

[0014] As a further technical solution of the present invention, the return assembly includes two fixed posts and a return spring. The two fixed posts are respectively installed on the two top racks of the same protective cover, and the two ends of the return spring are respectively installed on the two fixed posts of the same protective cover.

[0015] As a further technical solution of the present invention, the locking mechanism includes a U-shaped locking plate and a locking screw. The U-shaped locking plate is slidably installed on the side slide rail, and the locking screw is movably installed in the middle of the U-shaped locking plate. The threaded end of the locking screw passes through the side slide rail and is threadedly connected to the locking hole opened at the bottom of the front protective seat.

[0016] Compared with the prior art, the beneficial effects of the present invention are: The design of the linkage switch mechanism can realize the simultaneous opening and closing of the top and side inspection ports. The operation of a single mechanism can complete the opening and closing of multiple inspection ports, effectively preventing external dust, moisture and debris from entering the protective device, improving the insulation protection level and operational reliability of the terminal block, avoiding safety hazards such as insulation degradation, poor contact or short circuit arcing caused by moisture and dust accumulation, and simplifying the operation process and improving wiring and disconnection efficiency. The design of the protective module not only forms a fully enclosed insulating protective cavity for the terminal blocks, physically isolating the live terminal blocks from the internal space of the distribution cabinet, reducing the risk of accidental electric shock, and meeting the safety protection specifications of the distribution cabinet; it can also be flexibly spliced ​​according to the length of the terminal blocks, thereby adjusting its coverage length on the terminal blocks, adapting to terminal blocks of different specifications or different numbers of sections, effectively improving the versatility and adaptability of the protective device, and expanding the application range of the device.

[0017] To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the front structure of the terminal block insulation isolation protection device for the power distribution cabinet provided in an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the rear structure of the terminal block insulation isolation protection device for the power distribution cabinet provided in an embodiment of the present invention.

[0020] Figure 3 This is a cross-sectional view of the internal structure of the electrical distribution cabinet terminal block insulation isolation protection device provided in an embodiment of the present invention.

[0021] Figure 4 for Figure 1 Enlarged view of the structure of the central protective track and protective module.

[0022] Figure 5 for Figure 4 Exploded view of the central protection module.

[0023] Figure 6 for Figure 3 Enlarged view of the structure at point A in the middle.

[0024] Figure 7 for Figure 1 A schematic diagram of the central linkage switch mechanism and the opening and closing mechanism.

[0025] Figure 8 for Figure 7 Enlarged view of the structure of the central linkage switch mechanism.

[0026] Figure 9 for Figure 7 Enlarged side view of the opening and closing mechanism.

[0027] Figure 10 for Figure 4 Enlarged view of the structure at point B.

[0028] Reference numerals: 100-protective rail, 110-side slide groove, 120-side slide track, 200-protective module, 210-front protective seat, 211-locking hole, 220-rear protective seat, 230-protective cover, 231-side inspection port, 232-top inspection port, 233-L-shaped slide, 240-sealing seat, 250-adsorption assembly, 251-adsorption component, 252-mounting plate, 260-sealing strip, 270-adsorption groove, 300-side inspection plate, 310-telescopic seat, 400-top inspection plate, 500-interlocking switch mechanism, 510-interlocking Components: 511-Top rack, 512-Linkage gear, 513-Axle, 514-Wheel frame, 515-Side rack, 520-Return assembly, 521-Fixing post, 522-Return spring, 600-Opening and closing mechanism, 610-Opening and closing lever, 620-Restriction assembly, 621-Restriction post, 622-Mounting bracket, 623-Restriction knob, 624-Restriction protrusion, 625-Restriction slot, 626-Protrusion release groove, 700-Locking mechanism, 710-U-shaped locking plate, 720-Locking screw, 800-Terminal block, 900-Terminal rail. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0030] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0031] like Figures 1 to 10As shown, an embodiment of the present invention provides an insulation and protection device for terminal blocks of a distribution cabinet, including a protective rail 100 fixed on the inner wall of the distribution cabinet. The protective rail 100 is parallel to the terminal rail 900 on which the terminal blocks 800 are installed and is symmetrically arranged on both sides of the terminal rail 900. A side slide groove 110 and a side slide rail 120 are respectively opened on one side of the protective rail 100 along its layout direction. The side slide rail 120 is symmetrically arranged on both sides of the side slide groove 110. A locking mechanism 700 is installed on the side slide rail 120, and one end of the locking mechanism 700 penetrates the side slide groove 110. The device also includes: The protective module 200 comprises a front protective seat 210, a rear protective seat 220, a protective cover 230, a sealing seat 240, an adsorption assembly 250, a side inspection plate 300, and a top inspection plate 400. The front protective seat 210, rear protective seat 220, and sealing seat 240 are slidably mounted on two protective rails 100 at both ends and are located outside the terminal block 800. Each of the front protective seat 210, rear protective seat 220, and sealing seat 240 has an adsorption groove 270 on one side for mounting the adsorption assembly 250. One side of the front protective seat 210 is connected to the sealing seat 240 or an adjacent front protective seat 210 via the adsorption assembly 250 to form a whole. The rear protective seat 220 is connected to the sealing seat 240 or an adjacent front protective seat 210 via the adsorption assembly 250. The component 250 is connected to the sealing seat 240 as a whole. The protective cover 230 is located between the front protective seat 210 and the rear protective seat 220 and is fixedly connected to the side walls of both. The protective cover 230 has symmetrical side inspection ports 231 on both sides and a top inspection port 232 on the front end face of the protective cover 230. L-shaped slides 233 are provided on the outer sides of both the side inspection ports 231 and the top inspection ports 232. The side inspection plate 300 is slidably mounted on the L-shaped slides 233 and cooperates with the side inspection port 231. The bottom of the side inspection port 231 has comb-shaped telescopic seats 310 arranged at equal intervals. The two top inspection plates 400 are symmetrically slidably mounted on the L-shaped slides 233 and cooperate with the top inspection ports 232. An opening and closing mechanism 600 is installed on the outer end faces of the two top inspection plates 400, and the opening and closing mechanism 600 can change the opening and closing state of the two top inspection plates 400. A linkage switch mechanism 500 is installed on the outer wall of the front protective seat 210 and the rear protective seat 220. One end of the linkage switch mechanism 500 is connected to two top inspection plates 400 respectively, and the other end of the linkage switch mechanism 500 is connected to the side inspection plates 300 installed on both sides of the protective cover 230 respectively. When the opening and closing mechanism 600 moves the two top inspection plates 400 away from each other, the two top inspection plates 400 can not only open the top inspection port 232, providing effective operating space for the installation and removal of the terminal block 800 and the grounding wire, making it convenient for users to lock the grounding wire on the terminal block 800 or remove the grounding wire from the terminal block 800; it can also drive the side inspection plates 300 on both sides of the protective cover 230 to slide synchronously through the linkage switch mechanism 500, so that the side inspection plates 300 open the side inspection port 231 by sliding, providing a channel for the quick insertion and removal of the grounding wire and the terminal block 800, realizing the efficient access or removal of the grounding wire from the protective device; When the opening and closing mechanism 600 moves the two top inspection plates 400 closer together, the two top inspection plates 400 can not only restore the seal on the top inspection port 232, but also drive the two side inspection plates 300 to slide synchronously through the linkage switch mechanism 500. During the sliding process, the side inspection plates 300 can drive the telescopic seat 310 at their bottom to move down. The telescopic seat 310, on the one hand, moderately presses down the grounding wire and makes it closely contact the groove wall of the side inspection port 231, and on the other hand, it can achieve adaptive clamping of the grounding wire according to the external contour of the grounding wire, avoiding... The grounding wire simultaneously and reliably seals the side access port 231, effectively preventing external dust, moisture, and debris from entering the protective device. This improves the insulation protection level and operational reliability of the terminal block 800, avoiding safety hazards such as insulation degradation, poor contact, or short circuit arcing caused by moisture or dust accumulation. Furthermore, the design of the linkage switch mechanism 500 allows for the simultaneous opening and closing of the top access port 232 and the side access port 231. A single mechanism can be used to open and close multiple access ports, simplifying the operation process and improving wiring and disconnection efficiency. The design of the protection module 200 not only forms a fully enclosed insulating protective cavity for the terminal block 800, physically isolating the live terminal block 800 from the internal space of the distribution cabinet, reducing the risk of accidental electric shock and meeting the safety protection specifications of the distribution cabinet; it can also be flexibly spliced ​​according to the length of the terminal block 800, thereby adjusting its coverage length over the terminal block 800, adapting to terminal blocks 800 of different specifications or different numbers of sections, effectively improving the versatility and adaptability of the protection device, and expanding the application range of the device.

[0032] In a preferred embodiment, the size of a single side access panel 300 is larger than the size of a single side access port 231, ensuring that a single side access panel 300 can effectively and completely seal the single side access port 231. The size of the access panel formed by joining two top access panels 400 is larger than the size of a single top access port 232, ensuring that when the two top access panels 400 are tightly joined together, the resulting access panel can effectively and completely seal the single top access port 232. Simultaneously, elastic pads are installed on the inner end faces of both the side access panels 300 and the top access panels 400, providing cushioning between the inner walls of the access panels and the protective cover. The gaps between the outer walls of 230 are effectively filled, thereby preventing external moisture or dust from entering the side inspection ports 231 and top inspection ports 232 through the gaps between the inspection plate and the protective cover 230 during the sealing process, thus improving the isolation and protection performance of the device for the terminal block 800; the side inspection plate 300 and the top inspection plate 400 are preferably made of transparent flame-retardant polycarbonate material, which has excellent insulation properties and can achieve reliable insulation isolation. The high transparency design allows operators to observe the connection status of the terminal block 800 and the grounding wire without opening the inspection plate, reducing unnecessary opening and closing operations and lowering the risk of accidental contact; The front protective seat 210, rear protective seat 220, protective cover 230, and sealing seat 240 are preferably made of flame-retardant reinforced polyamide material. This material has excellent electrical insulation properties, and its flame retardant rating reaches UL94V-0 level. It can effectively block the electric field conduction of the live terminal block 800, eliminate the risk of insulation breakdown, and 30% glass fiber can be added to the above material to improve mechanical strength. It can withstand the vibration of the equipment in the distribution cabinet during operation and the contact of daily maintenance operations. It is resistant to high and low temperatures and is suitable for the humid and dusty working environment in the distribution cabinet, avoiding material aging that leads to protection failure. The telescopic base 310 is preferably made of elastic insulating silicone rubber. This material has excellent insulation performance and good elasticity and extensibility. It can adaptively clamp according to the external contour of the grounding wire, which not only ensures that the grounding wire is firmly positioned, but also avoids damage to the insulation layer of the grounding wire due to excessive clamping force. At the same time, silicone rubber is resistant to aging, high and low temperatures, and is not easily deformed. It can maintain its elasticity for a long time, ensuring the sealing of the inspection port 231 on the opposite side, and taking into account both insulation protection and cable protection functions.

[0033] like Figures 1 to 6As shown, in a preferred embodiment of the present invention, the adsorption assembly 250 includes an adsorption element 251 and a mounting plate 252. The adsorption element 251 is embedded in the adsorption groove 270. The mounting plate 252 is fastened in the adsorption groove 270 by screws and presses against the adsorption element 251. The outer surface of the mounting plate 252 is embedded in the adsorption groove 270 and does not protrude from the end face of the adsorption groove 270, thus avoiding the mounting plate 252 from being exposed. This ensures the fit and sealing of the front protective seat 210, the rear protective seat 220 and the sealing seat 240 when they are connected, and eliminates the risk of gaps.

[0034] The adsorption components 251 on the front protective base 210 and the rear protective base 220 can form a fully enclosed insulating protective cavity for the terminal block 800 by adsorbing each other with the adsorption components 251 on the adjacent front protective base 210 or the sealing base 240. This physically isolates the live terminal block 800 from the internal space of the distribution cabinet, reduces the risk of accidental electric shock, and meets the safety protection specifications of the distribution cabinet. According to the length of the terminal block 800, a corresponding number of protective modules 200 can be selected. Adjacent adsorption components 251 can connect multiple protective modules 200 into a whole by attracting each other, thereby adjusting the coverage length of the protective device on the terminal block 800, adapting to terminal blocks 800 of different specifications or different numbers of sections, effectively improving the versatility and adaptability of the device, and expanding the application range of the device.

[0035] Sealing strips 260 are installed on the end faces of the front protective seat 210, rear protective seat 220, and sealing seat 240 on the same side as the adsorption component 250. The sealing strips 260 are arranged around the outside of the adsorption component 250. The sealing strips 260 can seal the splicing gaps between the front protective seat 210, rear protective seat 220, and sealing seat 240, effectively preventing external moisture, dust, and debris from entering the device through the splicing gaps. This prevents the terminal block 800 from getting damp and accumulating dust, which could lead to reduced insulation capacity, poor contact, and other faults, further improving the sealing performance and insulation protection reliability of the overall protective device.

[0036] In a preferred embodiment, the adsorption component 251 preferably uses a strong neodymium iron boron magnet, which is wrapped with a thick flame-retardant insulating epoxy resin coating. The magnet itself is not directly exposed, which ensures the adsorption force to achieve reliable docking between components, and the epoxy resin coating achieves complete insulation and isolation, avoiding the conduction of electric field caused by the magnet's conductivity, thus meeting the insulation protection requirements.

[0037] like Figures 1 to 9As shown, in a preferred embodiment of the present invention, the opening and closing mechanism 600 includes an opening and closing lever 610 and a limiting component 620. The opening and closing lever 610 is symmetrically fixed on two top inspection plates 400 on the same protective cover 230. The limiting component 620 is located on one side of the opening and closing lever 610 and is connected to the two top inspection plates 400 on the same protective cover 230.

[0038] The limiting component 620 includes a limiting post 621, a mounting bracket 622, a limiting knob 623, limiting protrusions 624, and a limiting seat 625. The limiting post 621 is parallel to the two top access plates 400. One end of the limiting post 621 is rotatably mounted on one top access plate 400 via the mounting bracket 622, and the other end of the limiting post 621 is slidably engaged with the limiting seat 625 mounted on the other top access plate 400. A limiting knob 623 is fixed to one end of the limiting post 621. The limiting protrusions 624 are equidistantly arranged on the outer wall of the limiting post 621. The limiting seat 625 has a protrusion release groove 626 that cooperates with the limiting protrusions 624.

[0039] The thickness of the limiting seat 625 is slightly smaller than the gap width between two adjacent limiting protrusions 624, so that the limiting knob 623 drives the limiting post 621 to rotate, and the limiting post 621 drives the limiting protrusion 624 to rotate, so that the limiting protrusion 624 and the protrusion release groove 626 are misaligned with each other, and the limiting seat 625 is located between two adjacent limiting protrusions 624, thereby completing the positioning and locking of the two top inspection plates 400 in different opening and closing positions, ensuring that the top inspection port 232 remains stable in the open or closed state, and will not be displaced due to vibration or accidental contact, thereby improving the reliability and operational safety of the device.

[0040] like Figures 2 to 9 As shown, in a preferred embodiment of the present invention, the linkage switch mechanism 500 includes a linkage component 510 and a return component 520. The linkage component 510 is symmetrically arranged along the center line of the two top inspection plates 400 and installed on the outer wall of the front protective seat 210 and the rear protective seat 220. One end of the linkage component 510 is connected to the top inspection plate 400, and the other end of the linkage component 510 is connected to the side inspection plate 300. The two ends of the return component 520 are respectively installed on the two linkage components 510 of the same protective cover 230.

[0041] The linkage assembly 510 includes a top rack 511, a linkage gear 512, a wheel axle 513, a wheel frame 514, and a side rack 515. The top rack 511 is parallel to the L-shaped slide 233 and one end of it is fixedly connected to the top inspection plate 400. The other end of the top rack 511 meshes with one side of the linkage gear 512. The two top racks 511 located in the same protective cover 230 are respectively connected to the two ends of the return assembly 520. The linkage gear 512 is fixed on the wheel axle 513. The wheel axle 513 is rotatably mounted on the outer wall of the front protective seat 210 and the rear protective seat 220 through the wheel frame 514. The other side of the linkage gear 512 meshes with one end of the side rack 515. The other end of the side rack 515 is fixedly connected to the side inspection plate 300.

[0042] Users can change the locking state of the two top access plates 400 through the limiting component 620 and control the movement state of the two top access plates 400 through the two opening and closing levers 610. When the two top access plates 400 move away from each other, they can not only open the top access port 232, providing effective operating space for the installation and removal of the terminal block 800 and the grounding wire, making it convenient for users to lock the grounding wire on the terminal block 800 or remove the grounding wire from the terminal block 800; they can also drive the two top racks 511 to move away from each other, and the two top racks 511 drive the two... The rotation of the two linkage gears 512 drives the two side racks 515 meshing with each other to move, so that the two side racks 515 can drive the side inspection plates 300 on both sides of the protective cover 230 to slide synchronously. This allows the side inspection plates 300 to open the side inspection ports 231 by sliding, providing a channel for the quick insertion and removal of the grounding wire and the terminal block 800, realizing the efficient access or removal of the grounding wire from the protective device. In addition, during this process, the mutual separation of the two top racks 511 can also drive the return component 520 to a stretched and stored state. When it is necessary to seal the side access port 231 and the top access port 232, the opening and closing lever 610 is released, allowing the return assembly 520 to drive the two top racks 511 closer together under the action of elastic force. The two top racks 511 can not only drive the two top access plates 400 closer together, restoring the seal on the top access port 232, but also drive the two linkage gears 512 to rotate in opposite directions. The two linkage gears 512 drive the two side access plates 300 to slide synchronously through the two side racks 515, and the side access plates 300 can slide during the sliding process. The telescopic seat 310 at its bottom moves downward. On the one hand, the telescopic seat 310 presses down the grounding wire appropriately and makes it closely contact the groove wall of the side inspection port 231. On the other hand, it can adaptively clamp the grounding wire according to the external contour of the grounding wire. While avoiding the grounding wire, it can reliably block the side inspection port 231, effectively preventing external dust, moisture and debris from entering the interior of the protective device, improving the insulation protection level and operational reliability of the terminal block 800, and avoiding safety hazards such as insulation degradation, poor contact or short circuit arcing caused by moisture and dust accumulation.

[0043] like Figures 2 to 9 As shown, in a preferred embodiment of the present invention, the return assembly 520 includes two fixing posts 521 and a return spring 522. The two fixing posts 521 are respectively installed on the two top racks 511 of the same protective cover 230, and the two ends of the return spring 522 are respectively installed on the two fixing posts 521 of the same protective cover 230.

[0044] When the two top inspection plates 400 move away from each other, the two top racks 511 can drive the two fixed posts 521 to move away from each other, so that the two fixed posts 521 can stretch the return spring 522 and put it into a stored state. When it is necessary to block the side inspection port 231 and the top inspection port 232, the opening and closing block 610 is released. The return spring 522 can drive the two fixed posts 521 to move closer to each other through its own elastic force. The two fixed posts 521 can drive the two top racks 511 to move closer to each other, thereby completing the synchronous blocking of the top inspection port 232 and the side inspection port 231. This effectively prevents external dust, moisture and debris from entering the interior of the protective device, improves the insulation protection level and operational reliability of the terminal block 800, and avoids safety hazards such as insulation degradation, poor contact or short circuit arcing caused by moisture and dust accumulation.

[0045] like Figure 1 , Figure 4 and Figure 10As shown, in a preferred embodiment of the present invention, the locking mechanism 700 includes a U-shaped locking plate 710 and a locking screw 720. The U-shaped locking plate 710 is slidably mounted on the side slide rail 120. The locking screw 720 is movably mounted in the middle of the U-shaped locking plate 710. The threaded end of the locking screw 720 passes through the side slide groove 110 and is threadedly connected to the locking hole 211 opened at the bottom of the front protective seat 210.

[0046] Initially, the threaded end of the locking screw 720 is threadedly connected to the front end of the locking hole 211. The locking screw 720 does not compress the U-shaped locking plate 710, allowing it to slide freely on the side slide rail 120. This facilitates the free movement of the front protective seat 210 on the protective rail 100, enabling the protective module 200 to adaptively change its position according to the layout and quantity of the terminal block 800, effectively improving the assembly flexibility and installation efficiency of the protective device. When the protective module 200 is adjusted to the predetermined position and achieves full coverage of the terminal block 800, Then, continue to tighten the locking screw 720 until its threaded end engages with the rear end of the locking hole 211. During this process, the nut end of the locking screw 720 will exert axial pressure on the U-shaped locking plate 710, causing the U-shaped locking plate 710 to abut tightly against the inner wall of the side slide 120, greatly increasing the friction between the two, thereby achieving the locking and positioning of the protective module 200 on the protective track 100, preventing the protective module 200 from shifting or moving during the vibration of the distribution cabinet or daily operation, and ensuring the stability and reliability of the insulation isolation and sealing protection state of the protective device.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A terminal block insulation and protection device for a power distribution cabinet, comprising a protective rail fixed to the inner wall of the power distribution cabinet, the protective rail being parallel to the terminal rail on which the terminal blocks are installed and symmetrically arranged on both sides of the terminal rail, wherein a side slide groove and a side slide rail are respectively formed on one side of the protective rail along its layout direction, the side slide rails being symmetrically arranged on both sides of the side slide grooves, and a locking mechanism is installed on the side slide rails, characterized in that, Also includes: The protective module comprises a front protective seat, a rear protective seat, a protective cover, a sealing seat, an adsorption assembly, a side inspection plate, and a top inspection plate. The front protective seat, rear protective seat, and sealing seat are slidably mounted on two protective rails at both ends and are located outside the terminal block. Each of the front protective seat, rear protective seat, and sealing seat has an adsorption groove on one side for installing the adsorption assembly. One side of the front protective seat is connected to the sealing seat and the adjacent front protective seat via the adsorption assembly to form a whole. The rear protective seat is connected to the sealing seat via the adsorption assembly to form a whole. The protective cover is located on the front protective seat. The protective cover is fixedly connected to the side walls of the base and the rear protective base. The protective cover has symmetrical side inspection ports on both sides and a top inspection port on the front end face of the protective cover. L-shaped slides are provided on the outer sides of the side inspection ports and the top inspection ports. The side inspection plates are slidably installed on the L-shaped slides and cooperate with the side inspection ports. The bottom of the side inspection ports has comb-shaped telescopic seats arranged at equal intervals. The two top inspection plates are symmetrically slidably installed on the L-shaped slides and cooperate with the top inspection ports. Multiple protective modules are spliced ​​together to form a fully enclosed insulating protective cavity for the terminal block. An opening and closing mechanism is installed on the outer end faces of the two top inspection plates; The linkage switch mechanism is installed on the outer wall of the front and rear protective seats. One end of the linkage switch mechanism is connected to two top inspection plates, and the other end of the linkage switch mechanism is connected to the side inspection plates installed on both sides of the protective cover. The linkage switch mechanism and the opening and closing mechanism cooperate to realize the synchronous opening and closing of the top inspection port and the side inspection port.

2. The electrical distribution cabinet terminal block insulation isolation protection device according to claim 1, characterized in that, The specifications of a single side access panel are larger than the specifications of a single side access port, and the specifications of the access panel formed by two top access panels are larger than the specifications of a single top access port. Both the side access panels and the top access panels are made of transparent flame-retardant polycarbonate material.

3. The electrical distribution cabinet terminal block insulation isolation protection device according to claim 1, characterized in that, The adsorption assembly includes an adsorption element and a mounting plate. The adsorption element is embedded in the adsorption groove, and the mounting plate is locked in the adsorption groove by screws and squeezes the adsorption element. The outer surface of the mounting plate is embedded in the adsorption groove.

4. The electrical distribution cabinet terminal block insulation and protection device according to claim 1, characterized in that, Sealing strips are installed on the end faces of the front protective seat, rear protective seat, and sealing seat on the same side as the adsorption component. The sealing strips are arranged around the outside of the adsorption component and are used to seal the splicing gaps between the front protective seat, rear protective seat, and sealing seat.

5. The electrical distribution cabinet terminal block insulation and protection device according to claim 1, characterized in that, The opening and closing mechanism includes an opening and closing lever and a limiting component. The opening and closing lever is symmetrically fixed to two top inspection plates on the same protective cover. The limiting component is located on one side of the opening and closing lever and is connected to the two top inspection plates on the same protective cover.

6. The electrical distribution cabinet terminal block insulation and protection device according to claim 5, characterized in that, The limiting assembly includes a limiting post, a mounting bracket, a limiting knob, limiting protrusions, and a limiting seat. The limiting post is parallel to two top inspection plates. One end of the limiting post is rotatably mounted on one top inspection plate via the mounting bracket, and the other end of the limiting post is slidably engaged with a limiting seat mounted on the other top inspection plate. A limiting knob is fixed to one end of the limiting post. Limiting protrusions are equidistantly arranged on the outer wall of the limiting post, and a protrusion release groove that mates with the limiting protrusions is provided on the limiting seat.

7. The electrical distribution cabinet terminal block insulation isolation protection device according to claim 1, characterized in that, The linkage switch mechanism includes a linkage component and a return component. The linkage component is symmetrically arranged along the center line of the two top inspection plates and installed on the outer wall of the front and rear protective seats. One end of the linkage component is connected to the top inspection plate, and the other end of the linkage component is connected to the side inspection plate. The two ends of the return component are respectively installed on the two linkage components of the same protective cover.

8. The electrical distribution cabinet terminal block insulation and protection device according to claim 7, characterized in that, The linkage assembly includes a top rack, a linkage gear, a wheel axle, a wheel frame, and a side rack. The top rack is parallel to the L-shaped slide and one end of it is fixedly connected to the top inspection plate. The other end of the top rack meshes with one side of the linkage gear. Two top racks located on the same protective cover are respectively connected to both ends of the return assembly. The linkage gear is fixed on the wheel axle. The wheel axle is rotatably mounted on the outer wall of the front and rear protective seats through the wheel frame. The other side of the linkage gear meshes with one end of the side rack, and the other end of the side rack is fixedly connected to the side inspection plate.

9. The electrical distribution cabinet terminal block insulation isolation protection device according to claim 8, characterized in that, The return assembly includes two fixed posts and a return spring. The two fixed posts are respectively installed on the two top racks of the same protective cover, and the two ends of the return spring are respectively installed on the two fixed posts of the same protective cover.

10. The electrical distribution cabinet terminal block insulation isolation protection device according to claim 1, characterized in that, The locking mechanism includes a U-shaped locking plate and a locking screw. The U-shaped locking plate is slidably mounted on the side slide rail. The locking screw is movably mounted in the middle of the U-shaped locking plate. The threaded end of the locking screw passes through the side slide rail and is threadedly connected to the locking hole opened at the bottom of the front protective seat.

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