Low voltage branch box

Abstract

This application relates to a low-voltage branch box, belonging to the technical field of power distribution equipment. It includes a distribution box with mounting rails on its inner wall. Several electrical components are mounted on the mounting rails. A first partition is provided inside the distribution box, located on the side of the electrical components away from the mounting rails. The first partition is perpendicular to the mounting direction of the electrical components. An elongated slot is formed on the first partition, parallel to the mounting rails. The operating handle of the electrical components can pass through the elongated slot. The first partition divides the distribution box into two areas: the side containing the mounting rails and electrical components is the wiring area, and the side containing the operating handle of the electrical components is the control area. This application achieves the effect of providing insulation isolation on the live side of the low-voltage branch box while also accommodating different installation positions of the electrical components, thus improving operational safety.

Description

Technical Field

[0001] This application relates to the field of power distribution equipment technology, and in particular to a low-voltage branch box. Background Technology

[0002] Low-voltage branch boxes are important power distribution equipment at the end of the power distribution network for power distribution, control and protection. They are usually installed in power supply lines in residential areas, industrial and mining enterprises, road lighting and new energy charging piles, etc. They are equipped with electrical components such as circuit breakers, meters and tap terminals to realize multi-branch power supply and line protection functions.

[0003] In existing technologies, to achieve isolation and protection between the internal live wiring area and the operating area, and to reduce the risk of operators accidentally touching live parts, a partition is often installed inside the enclosure to separate the wiring part of the electrical components from the operating handle. However, since the holes on the partition are pre-drilled and fixed, the installation position of the electrical components on the mounting rail must be precisely aligned with the holes; otherwise, the handle cannot pass through the partition smoothly. This requires high precision in on-site installation. At the same time, when the power distribution scheme is changed or different specifications of electrical components need to be replaced, the original holes often cannot match the position of the operating handle of the new component, requiring the holes to be re-drilled or even the entire partition to be replaced. This results in poor adaptability, and different configurations require partitions with different hole layouts, which is not conducive to standardized production and universal design. Summary of the Invention

[0004] In order to achieve both insulation isolation on the live side and compatibility with different installation positions of electrical components in the low-voltage branch box, thereby improving operational safety, this application provides a low-voltage branch box.

[0005] The low-pressure branch box provided in this application adopts the following technical solution: A low-voltage branch box includes a distribution box with an inner wall provided with mounting rails. Several electrical components are mounted on the mounting rails. A first partition is provided inside the distribution box, located on the side of the electrical components away from the mounting rails. The first partition is perpendicular to the mounting direction of the electrical components. An elongated slot is formed on the first partition, parallel to the mounting rails. The operating handle of the electrical components can pass through the elongated slot. The first partition divides the distribution box into two areas: the side containing the mounting rails and electrical components is the wiring area, and the side containing the operating handle of the electrical components is the control area.

[0006] By adopting the above technical solution, the first partition divides the distribution box into two areas: the wiring area and the control area. This achieves physical isolation between the live wiring part and the operating part, preventing operators from accidentally touching the live wiring terminals when operating the handle switch, greatly improving the safety of equipment operation and effectively avoiding the risk of electric shock. At the same time, the long slot is set parallel to the mounting rail. No matter how the installation position of the electrical components on the mounting rail is adjusted, or different specifications of electrical components are replaced, the operating handle can smoothly pass through the long slot to extend to the control area without the need to re-drill holes or replace the partition. This significantly reduces the on-site installation accuracy requirements, improves the equipment's adaptability to different power distribution schemes and different specifications of components, and facilitates standardized production and universal design.

[0007] Optionally, the distribution box includes an outer box and an inner box, with the first partition disposed inside the inner box; the outer box is provided with a door, and an anti-theft lock is provided between the outer box and the door; the inner box and the outer box are connected on the side where the door is located, so that when the door is closed, the door can seal the space inside the inner box.

[0008] By adopting the above technical solution, the distribution box adopts a double-layer structure design with an outer box and an inner box. The inner box and the outer box are fixedly connected on the side where the box door is located. This not only enhances the structural strength of the entire distribution box and improves its impact resistance and deformation resistance, but also realizes the linkage control between the box door and the inner box. After the box door is closed, it can directly seal and protect the internal space of the inner box, preventing external dust, moisture and other impurities from entering the inner box and affecting the normal operation of electrical components. An anti-theft lock is installed between the outer box and the box door to further enhance the anti-theft performance of the equipment, improve the safety of the equipment when used outdoors, and ensure the stable operation of the power distribution line.

[0009] Optionally, a second partition is provided inside the inner box, which is perpendicular to the first partition. The sidewalls of the second partition are all connected to the inner wall of the inner box. The second partition divides the space inside the inner box into multiple independent functional chambers. Waterproof sealing strips are provided at the connection between adjacent functional chambers. The first partition is provided in each functional chamber, and each functional chamber is provided with an independent grounding terminal.

[0010] By adopting the above technical solution, the second partition is set perpendicular to the first partition, dividing the inner enclosure into multiple independent functional chambers. Different types and functions of electrical components can be arranged in different chambers according to actual power distribution needs, flexibly adapting to different installation requirements in different scenarios, realizing functional zoning management, and facilitating later inspection and maintenance. The waterproof sealing strips set at the connection between adjacent functional chambers effectively improve the sealing performance between chambers, preventing moisture and dust from penetrating between chambers and avoiding damage to electrical components due to moisture and dust accumulation. Each functional chamber is equipped with an independent grounding terminal to realize zoned grounding protection, further improving the electrical safety performance of the equipment and reducing the risk of faults such as leakage and short circuit.

[0011] Optionally, the first partition is provided with an isolating member that passes through the long groove and engages with it, and can slide within the long groove along its length. The isolating member can fill the blank area in the long groove that is not occupied by the operating handle, thereby isolating the wiring area from the control area.

[0012] By adopting the above technical solution, the isolator is snapped into the long groove of the first partition and can slide freely along the length of the groove. This effectively fills the blank area in the long groove that is not occupied by the operating handle, isolating the wiring area from the control area and preventing external debris from entering the wiring area. At the same time, it prevents operators from accidentally touching live parts through the blank area, further enhancing the isolation and protection effect. Furthermore, it can flexibly adjust its installation position and coverage area according to the installation position and quantity of electrical components, adapting to different component layouts without the need for additional replacement of the isolator, thus improving the flexibility and adaptability of the equipment.

[0013] Optionally, the insulating element includes two mounting blocks, with a corrugated insulating curtain connected between the two mounting blocks. The two ends of the corrugated insulating curtain are respectively connected to the two mounting blocks, and the curtain can be stretched and contracted by the relative movement of the two mounting blocks.

[0014] By adopting the above technical solution, the isolation component consists of two mounting blocks and a corrugated insulating curtain. The two mounting blocks provide stable mounting support for the corrugated insulating curtain, ensuring that the corrugated insulating curtain can be firmly fixed in the long groove. Through the relative movement of the two mounting blocks, the corrugated insulating curtain can be stretched and contracted, thereby flexibly adjusting the length of the isolation component and accurately adapting to blank areas of different lengths in the long groove. This not only fully fills the blank areas to achieve effective isolation, but also does not affect the normal operation of the operating handle, thus balancing protection and operability.

[0015] Optionally, the mounting block includes two clamping plates arranged in parallel, with a mounting plate between them. The mounting plate and the two clamping plates are parallel to each other, and a connecting plate connects the mounting plate and the two clamping plates to form a whole. The connecting plate vertically penetrates the long groove, so that the mounting plate is located within the long groove. The two clamping plates are located on both sides of the first partition, and the corrugated insulating curtain is located within the long groove. Both ends of the corrugated insulating curtain are connected to the two mounting plates respectively.

[0016] By adopting the above technical solution, the mounting block adopts an integrated structure design of double clamping plates, mounting plate and connecting plate. The connecting plate penetrates vertically through the long groove, so that the mounting plate is embedded in the long groove. The two clamping plates are respectively attached to the two sides of the first partition, which plays a limiting and fixing role for the entire mounting block, preventing the mounting block from shifting or falling off during sliding, and ensuring that the mounting block drives the corrugated insulating curtain to slide stably along the long groove. At the same time, the corrugated insulating curtain is connected to the mounting plate to ensure that the corrugated insulating curtain always stays in the long groove during the stretching and contraction process, avoiding displacement that would lead to isolation failure, and further improving the stability and reliability of the isolation component.

[0017] Optionally, the first partition is hinged to the inner wall of the inner box, and an installation groove is provided at the end of the first partition away from the hinge point, and a sealing gasket is detachably connected to the installation groove. The long groove has a cross-shaped cross section and extends to the side where the sealing gasket is located. The sealing gasket can seal the side of the long groove away from the hinge point. When the sealing gasket is removed, the mounting block can be inserted into the long groove from one side of the sealing gasket, so that the corrugated insulating curtain is located in the long groove.

[0018] By adopting the above technical solution, the first partition is hinged to the inner wall of the inner box, allowing for flexible rotation and facilitating the inspection, maintenance, and replacement of electrical components later. An installation groove is provided at the end of the first partition away from the hinge point, through which a removable sealing gasket is fixed. This effectively seals the side of the long groove away from the hinge point, preventing dust and moisture from entering the long groove and wiring area. It also allows for removal when installing or replacing the insulating component, providing a convenient passage for inserting and removing the mounting block and corrugated insulating curtain, simplifying the installation and maintenance process. The cross-shaped cross-section of the long groove provides space for the corrugated insulating curtain, enhancing isolation in conjunction with its stepped structure. Simultaneously, it guides and limits the mounting plate, ensuring smooth sliding of the mounting block and preventing jamming.

[0019] Optionally, the inner casing is made of insulating and thermally conductive material, the outer casing has heat dissipation holes, a heat dissipation channel is formed between the inner casing and the outer casing, and the outer casing is provided with an anti-corrosion coating.

[0020] By adopting the above technical solution, the inner enclosure is made of insulating and thermally conductive material, which not only has good insulation performance to prevent the inner enclosure from becoming electrified and causing safety hazards, but also can quickly dissipate the heat generated by the electrical components inside the enclosure during operation, avoiding heat accumulation. The outer enclosure serves as an outer protective layer, and the heat dissipation holes on it work in conjunction with the heat dissipation channels formed between the inner and outer enclosures to quickly expel the heat dissipated from the inner enclosure to the outside, achieving efficient heat dissipation and ensuring that the electrical components operate stably at a suitable temperature, thus extending the service life of the components. The anti-corrosion coating on the exterior of the outer enclosure can effectively resist the erosion of complex environments such as acids, alkalis, and humidity, improving the corrosion resistance of the outer enclosure and enabling the low-voltage branch box to adapt to more harsh working environments, expanding the applicability of the equipment.

[0021] Optionally, the mounting rail is equipped with a surge protector and tap terminals. The tap terminals adopt a double-locking bolt structure, and each tap terminal is equipped with a transparent insulating cover.

[0022] By adopting the above technical solutions, the surge protector installed on the guide rail can effectively absorb instantaneous overvoltages such as lightning strikes and power grid surges, protecting the electrical components inside the box from impact damage, improving the equipment's lightning and surge protection capabilities, and ensuring the stable operation of the power distribution line; the tap terminals adopt a bolt double-locking structure, which greatly improves the connection stability between the tap terminals and the conductors, preventing loosening of the connection due to vibration, long-term use, etc., and avoiding faults such as poor contact and overheating; the transparent insulating cover installed on each tap terminal provides physical protection for the tap terminals without affecting the operation and maintenance personnel's observation of the tap terminal's working status and daily inspection, preventing problems such as accidental contact and dust accumulation, and further improving operational safety.

[0023] Optionally, the tap terminal includes a connector with an anti-oxidation coating on its surface, and the connector is arranged in color according to phase sequence.

[0024] By adopting the above technical solution, the tap terminal block surface is coated with an anti-oxidation coating, which can effectively prevent oxidation and corrosion of the terminal block during long-term use, avoid increased contact resistance and overheating caused by oxidation, ensure long-term stable and reliable electrical connection between the terminal block and the wire, extend the service life of the tap terminal block, and reduce maintenance costs. The terminal blocks are arranged by phase sequence color, which allows maintenance personnel to quickly and intuitively identify the phase sequence of each terminal block during wiring, maintenance, or inspection, effectively reducing the risk of wiring errors and equipment failures caused by incorrect phase sequence identification, significantly improving wiring efficiency and operational safety, while also facilitating daily inspection and maintenance management, and improving maintenance convenience.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. The first partition divides the distribution box into a wiring area and a control area, achieving physical isolation between the live wiring part and the operation part. This can effectively prevent operators from accidentally touching the live end when operating the handle, thus improving operational safety. At the same time, the long slot is parallel to the mounting rail, allowing for flexible adjustment of the electrical component installation position to accommodate different component specifications without the need for re-drilling holes or replacing the partition, improving adaptability and facilitating standardized production. 2. The distribution box adopts a double-layer box structure to enhance the overall structural strength. When the box door is closed, the inner box can be sealed to prevent dust and moisture from entering and affecting the operation of electrical components. It is equipped with anti-theft locks to improve the anti-theft performance of the equipment and the safety of outdoor use. 3. The second partition divides the interior of the inner enclosure into multiple independent functional chambers, which can flexibly adapt to the power distribution needs of different scenarios, realize functional zoning management, and facilitate later inspection and maintenance; each chamber is equipped with an independent grounding terminal to improve electrical safety performance and reduce the risk of leakage and short circuit; 4. The isolating element on the first partition can slide along the long slot, fill the blank area of ​​the long slot, further isolate the wiring area from the control area, prevent accidental contact and foreign objects from entering, and can be flexibly adjusted according to the component layout to improve the protection and flexibility of the equipment. 5. The inner enclosure is made of insulating and thermally conductive material, and the outer enclosure is equipped with heat dissipation holes to form a heat dissipation channel, which can efficiently dissipate the heat inside the enclosure, ensure the stable operation of electrical components and extend their service life; the anti-corrosion coating of the outer enclosure can resist the erosion of complex environments and expand the applicability of the equipment. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0027] Figure 2 This is a structural schematic diagram illustrating the functional chamber in an embodiment of this application.

[0028] Figure 3 This is a schematic diagram illustrating the structure of the reinforcing plate in an embodiment of this application.

[0029] Figure 4 This is a schematic diagram illustrating the structure of the sealing gasket in an embodiment of this application.

[0030] Figure 5 This is a schematic diagram illustrating the structure of the isolation component in an embodiment of this application.

[0031] Explanation of reference numerals in the attached drawings: 1. Distribution box; 11. Box door; 12. Anti-theft lock; 13. Heat dissipation channel; 14. Reinforcing plate; 2. Inner box; 21. First partition; 211. Long slot; 212. Mounting slot; 213. Sealing gasket; 22. Second partition; 221. Waterproof sealing strip; 23. Functional chamber; 231. Inlet cavity; 232. Branch cavity; 233. Outlet cavity; 24. Mounting rail; 25. Electrical component; 251. Main circuit breaker; 252. Branch circuit breaker; 253. Surge protector; 254. Tap terminal; 2541. Transparent insulating cover; 261. Wiring area; 262. Control area; 3. Outer box; 31. Heat dissipation hole; 4. Isolation component; 41. Mounting block; 411. Clamping plate; 412. Mounting plate; 413. Connecting plate; 42. Corrugated insulating curtain. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0033] This application discloses a low-pressure branch box.

[0034] like Figures 1 to 3 A low-voltage branch box includes a distribution box 1, which includes an outer box 3 and an inner box 2. The outer box 3 is made of cold-rolled steel plate and is formed by bending the cold-rolled steel plate. A door 11 is hinged to the front of the outer box 3, and an anti-theft lock 12 is installed between the outer box 3 and the door 11 to improve the security of the distribution box 1.

[0035] The inner box 2 is placed inside the outer box 3. The inner box 2 has an opening on the side facing the door 11. The edges of the opening are connected to the outer box 3 to achieve the integrated design of the inner box 2 and the outer box 3. When the door 11 is closed, the inner side of the door 11 fits against the front opening edge of the inner box 2, thereby sealing the internal space of the inner box 2. There are gaps between the inner box 2 and the outer box 3 on the side walls, top walls and bottom walls. These gaps form a heat dissipation channel 13 around the inner box 2. Several reinforcing plates 14 are installed in the heat dissipation channel 13. The reinforcing plates 14 connect the inner box 2 and the outer box 3 to improve the structural strength of the entire device. Several heat dissipation holes 31 are opened on the top wall and side walls of the outer box 3. The heat dissipation holes 31 are connected to the heat dissipation channel 13. The outer surface of the outer box 3 is also coated with an anti-corrosion coating to improve the weather resistance of the box in harsh outdoor environments.

[0036] Electrical components 25 are installed inside the inner housing 2, which is made of insulating and heat-conducting material. It has good electrical insulation performance to prevent the inner housing 2 from becoming electrified and causing safety hazards. It can also conduct internal heat to the heat dissipation channel 13 between the outer housing 3 and dissipate heat through the heat dissipation holes 31 provided on the outer housing 3.

[0037] The inner cabinet 2 is provided with two second partitions 22. The second partitions 22 are horizontally arranged and their surfaces are perpendicular to the cabinet door 11. The four sides of the second partitions 22 are fixedly connected to the inner wall of the inner cabinet 2, and waterproof sealing strips 221 are provided at the connection. The side of the second partition 22 facing the cabinet door 11 is sealed by the waterproof sealing strips 221, which divides the internal space of the inner cabinet 2 into three independent functional chambers 23, namely the inlet chamber 231, the branch chamber 232, and the outlet chamber 233.

[0038] Mounting rails 24 are provided on the inner walls of the inlet cavity 231, the branch cavity 232, and the outlet cavity 233. The mounting rails 24 are horizontally arranged and fixed to the rear wall of the inner housing 2. The mounting rails 24 are used to install electrical components 25. Each electrical component 25 can be arbitrarily adjusted in installation position along the length of the mounting rail 24. The mounting rail 24 of the inlet cavity 231 is equipped with a main circuit breaker 251 and a surge protector 253. The mounting rail 24 of the branch cavity 232 is equipped with a branch circuit breaker 252. The branch circuit breaker 252 is electrically connected to the outlet terminal of the main circuit breaker 251 and is used to distribute the main incoming power to each branch. The mounting rail 24 of the outlet cavity 233 is equipped with a tap terminal 254. The tap terminal 254 is electrically connected to the outlet terminal of the corresponding branch circuit breaker 252 and is used to connect the outlet cable and output the power.

[0039] like Figure 4 The tap terminals 254 are fastened with a double-locking bolt structure, and each tap terminal 254 is covered with a transparent insulating cover 2541. When the transparent insulating cover 2541 is closed, it completely covers the wiring part, providing physical protection for the wiring part without hindering daily visual inspection. The surface of the terminal block of the tap terminal 254 is provided with an anti-oxidation coating to prevent oxidation of the terminal block surface from increasing the contact resistance. The terminal blocks of each tap terminal 254 are arranged with different colors according to the phase sequence, which facilitates quick identification of the phase sequence during wiring and maintenance.

[0040] like Figure 1 and Figure 5Each of the inlet cavity 231, the branch cavity 232, and the outlet cavity 233 is provided with a first partition 21. The first partition 21 is arranged vertically, its surface is parallel to the box door 11, and perpendicular to the installation direction of the electrical component 25. The first partition 21 is located on the side of the electrical component 25 away from the mounting rail 24, that is, on the side where the operating handle of the electrical component 25 is located. The four edges of the first partition 21 are fitted to the inner wall of the functional chamber 23. One side edge of the first partition 21 is hinged to the inner wall of the inner box 2, so that the first partition 21 can be flipped outward relative to the inner box 2, which facilitates the inspection and replacement of the electrical components 25 behind it. A mounting groove 212 is provided on the side edge of the first partition 21 away from the hinge point. A sealing gasket 213 is detachably snapped into the mounting groove 212. The sealing gasket 213 is made of elastic rubber material and is used to seal the gap between the first partition 21 and the inner wall of the inner box 2.

[0041] A long groove 211 is formed on the first partition plate 21 along the horizontal direction. The length direction of the long groove 211 is parallel to the length direction of the mounting guide rail 24. The cross section of the long groove 211 is cross-shaped. One end of the long groove 211 extends to one side edge of the mounting groove 212 formed on the first partition plate 21. That is, the open end of the long groove 211 is sealed by the sealing gasket 213. When the sealing gasket 213 is removed from the mounting groove 212, that side end of the long groove 211 is in an open state.

[0042] When the electrical component 25 is installed on the mounting rail 24, its operating handle faces the first partition 21. Since the long slot 211 is parallel to the mounting rail 24 and its length covers the installation area of ​​multiple electrical components 25, the operating handle of the electrical component 25 can pass through the long slot 211 and extend to the other side of the first partition 21. No matter how the specific installation position of the electrical component 25 on the mounting rail 24 is adjusted, its operating handle can fall into the range of the long slot 211 and pass out smoothly.

[0043] The first partition 21 divides the space within each functional chamber 23 into two areas. The space behind the first partition 21 is the wiring area 261, where the wiring parts for mounting the guide rail 24 and electrical components 25 are located. The space in front of the first partition 21 is the control area 262, where the operating handle of the electrical components 25 is located. The first partition 21 isolates the internal space of each functional chamber 23, so that when the operator performs the opening and closing operation of the handle in the control area 262, they will not come into contact with the wiring area 261 behind it. Each functional chamber 23 is independently equipped with a grounding terminal for connecting the grounding wire.

[0044] An isolation element 4 is installed in the long groove 211 of the first partition 21. The isolation element 4 includes two mounting blocks 41 and a corrugated insulating curtain 42 connected between the two mounting blocks 41. The corrugated insulating curtain 42 is made of DMD composite insulating paper and pressed into a corrugated shape. Its two ends are fixedly connected to the two mounting blocks 41 respectively. It can stretch and contract by the relative movement between the two mounting blocks 41 to change its own length and adapt to the change of distance between the two mounting blocks 41.

[0045] Each mounting block 41 consists of two clamping plates 411, one mounting plate 412, and one connecting plate 413. The two clamping plates 411 are arranged parallel to each other and are located on both sides of the first partition 21. The mounting plate 412 is arranged between the two clamping plates 411, parallel to the clamping plates 411, and located inside the long groove 211. The connecting plate 413 is perpendicularly inserted into the long groove 211, and its two ends are fixedly connected to the two clamping plates 411, thereby connecting the two clamping plates 411 and the mounting plate 412 into a whole. The mounting block 41 can slide along the length of the long groove 211 without loosening. The corrugated insulating curtain 42 is located in the internal space of the long groove 211, and its two ends are connected to the mounting plates 412 of the two mounting blocks 41. Through the relative movement of the two mounting blocks 41, the corrugated insulating curtain 42 is stretched or contracted, thereby filling the blank area in the long groove 211 that is not occupied by the operating handle, and supplementing the isolation between the wiring area 261 and the control area 262.

[0046] When it is necessary to install or replace the isolation component 4, the sealing gasket 213 on the first partition 21 can be removed from the mounting groove 212. At this time, the end of the long groove 211 is open. Align the connecting plate 413 of the mounting block 41 with one end of the long groove 211 and slide it into the long groove 211 from the open end. Make the two clamping plates 411 fit against the two side surfaces of the first partition 21 respectively. The mounting plate 412 is embedded in the groove of the long groove 211. After the isolation component 4 is installed in place, the sealing gasket 213 is re-clamped into the mounting groove 212 to seal the end of the long groove 211.

[0047] The implementation principle of this application embodiment is as follows: Before installation and use, the outer casing 3 is fixed in the predetermined installation position. After the incoming cable is introduced, it is connected to the incoming terminal of the main circuit breaker 251 in the incoming cavity 231. The surge protector 253 is connected in parallel to the incoming circuit to discharge lightning overvoltage.

[0048] When installing electrical components 25, the first partition 21 is flipped outward along the hinge axis to fully expose the mounting rail 24. According to the power distribution scheme requirements, the installation positions of the main circuit breaker 251 and surge protector 253 are determined and fixed on the mounting rail 24 of the incoming line cavity 231. Each branch circuit breaker 252 is installed sequentially on the mounting rail 24 of the branch line cavity 232, and the incoming end of the branch circuit breaker 252 is connected to the corresponding outgoing end of the main circuit breaker 251. Tap terminals 254 are installed on the mounting rail 24 of the outgoing line cavity 233, and the incoming end of the tap terminal 254 is connected to the corresponding outgoing end of the branch circuit breaker 252. The specific position of each electrical component 25 on the mounting rail 24 can be flexibly adjusted according to the convenience of wiring and spatial layout, without considering the alignment of the handle.

[0049] After the electrical component 25 is installed, the isolator 4 is installed. The sealing gasket 213 at the end of the first partition 21 is removed from the mounting groove 212, exposing the open end of the long groove 211. Two mounting blocks 41 are taken, and the two ends of the corrugated insulating curtain 42 are fixedly connected to the mounting plates 412 of the two mounting blocks 41 respectively. The mounting blocks 41 are slid into the open end of the long groove 211, so that the two retaining plates 411 of the mounting blocks 41 are respectively attached to the two sides of the first partition 21, and the mounting plates 412 are embedded in the long groove 211. After sliding along the long groove 211 to the corresponding installation position, the position of the two mounting blocks 41 is adjusted so that the corrugated insulating curtain 42 is moderately stretched between the two mounting blocks 41, filling the blank area in the long groove 211 that is not occupied by the operating handle. Finally, the sealing gasket 213 is re-inserted into the mounting groove 212 to seal the end of the long groove 211.

[0050] Flip the first partition 21 back to the closed position so that its four edges fit against the inner wall of the functional chamber 23. Since the long groove 211 on the first partition 21 is parallel to the mounting rail 24 and the length of the long groove 211 covers the distribution area of ​​the electrical components 25 on the mounting rail 24, no matter where each electrical component 25 is located on the mounting rail 24, its operating handle will fall exactly into the range of the long groove 211 and naturally extend to the control area 262 in front of the first partition 21.

[0051] When the door 11 of the outer box 3 is closed, the inner side of the door 11 is abutted against the waterproof sealing strip 221 at the edge of the opening of the inner box 2, forming a seal inside the inner box 2. When the anti-theft lock 12 is locked, the distribution box 1 enters normal working state.

[0052] During normal operation, the electrical energy introduced by the incoming cable passes through the main circuit breaker 251 and surge protector 253, and is then distributed to each branch circuit breaker 252 via the busbar. It is then output to the end load via the outgoing cable through the tap terminal 254. When the operator needs to perform opening and closing operations, he / she opens the box door 11 and directly operates the corresponding electrical component 25's operating handle in the control area 262 on the front side of the first partition 21. The operator's hand cannot pass through the long slot 211 to reach the wiring area 261 behind, improving operational safety. When it is necessary to replace the electrical component 25 or adjust its installation position, it is only necessary to reopen the first partition 21 for operation. The operating handle of the component can still pass smoothly through the long slot 211 in the new position without the need to re-drill holes or replace the partition.

[0053] The heat generated by the electrical components 25 inside the box during operation is conducted from the inner box 2 through the insulating thermal conductive material to the heat dissipation channel 13 between the inner box 2 and the outer box 3, and discharged through the heat dissipation hole 31 to achieve continuous heat dissipation; the anti-corrosion coating on the outer surface of the outer box 3 resists the erosion of the external environment, the waterproof sealing strip 221 at the connection of each functional chamber 23 prevents water vapor and dust from penetrating between the chambers, and the transparent insulating cover 2541 protects the wiring part of the tap terminal 254 in the closed state without affecting daily visual inspection.

[0054] When a certain functional chamber 23 needs to be shut down for maintenance, only the incoming switch corresponding to that chamber needs to be disconnected, and the other chambers can still be kept energized, so as to realize independent maintenance by zone, reduce the scope of power outages, and improve the continuity of power supply.

[0055] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A low-voltage branch box, characterized in that: The distribution box (1) includes an inner wall with a mounting rail (24) and a plurality of electrical components (25) on the mounting rail (24). The distribution box (1) has a first partition (21) located on the side of the electrical components (25) away from the mounting rail (24). The mounting direction of the first partition (21) is perpendicular to that of the electrical components (25). The first partition (21) has a long groove (211) on it, which is parallel to the mounting rail (24). The operating handle of the electrical components (25) can pass through the long groove (211). The first partition (21) divides the distribution box (1) into two areas: the side with the mounting rail (24) and the electrical components (25) is the wiring area (261), and the side with the operating handle of the electrical components (25) is the control area (262).

2. The low-voltage branch box according to claim 1, characterized in that: The distribution box (1) includes an outer box (3) and an inner box (2). The first partition (21) is disposed inside the inner box (2). The outer box (3) is provided with a door (11). An anti-theft lock (12) is provided between the outer box (3) and the door (11). The inner box (2) and the outer box (3) are connected on the side where the door (11) is located, so that when the door (11) is closed, the door (11) can seal the space inside the inner box (2).

3. The low-pressure branch box according to claim 2, characterized in that: The inner box (2) is provided with a second partition (22), which is perpendicular to the first partition (21). The side walls of the second partition (22) are connected to the inner wall of the inner box (2). The second partition (22) divides the space inside the inner box (2) into multiple independent functional chambers (23). Waterproof sealing strips (221) are provided at the connection between adjacent functional chambers (23). The first partition (21) is provided in each functional chamber (23), and each functional chamber (23) is provided with an independent grounding terminal.

4. The low-voltage branch box according to claim 2, characterized in that: The first partition (21) is provided with an isolation member (4), which passes through the long groove (211) and engages with the long groove (211). It can slide within the long groove (211) along the length direction of the long groove (211). The isolation member (4) can fill the blank area in the long groove (211) that is not occupied by the operating handle, and isolate the wiring area (261) from the control area (262).

5. The low-voltage branch box according to claim 4, characterized in that: The isolation element (4) includes two mounting blocks (41), and a corrugated insulating curtain (42) is connected between the two mounting blocks (41). The two ends of the corrugated insulating curtain (42) are respectively connected to the two mounting blocks (41), and the stretching and contraction are achieved by the relative movement of the two mounting blocks (41).

6. The low-voltage branch box according to claim 5, characterized in that: The mounting block (41) includes two clamping plates (411) arranged in parallel. A mounting plate (412) is provided between the two clamping plates (411). The mounting plate (412) and the two clamping plates (411) are parallel to each other. A connecting plate (413) is connected between the mounting plate (412) and the two clamping plates (411), and they form a whole through the connecting plate (413). The connecting plate (413) penetrates the long groove (211) vertically, so that the mounting plate (412) is located in the long groove (211). The two clamping plates (411) are respectively located on both sides of the first partition (21). The corrugated insulating curtain (42) is located in the long groove (211), and the two ends of the corrugated insulating curtain (42) are respectively connected to the two mounting plates (412).

7. The low-voltage branch box according to claim 5, characterized in that: The first partition (21) is hinged to the inner wall of the inner box (2). The first partition (21) has an installation groove (212) at one end away from the hinge point. A sealing gasket (213) is detachably connected to the installation groove (212). The long groove (211) has a cross-shaped cross section and extends to the side where the sealing gasket (213) is located. The sealing gasket (213) can seal the side of the long groove (211) away from the hinge point. When the sealing gasket (213) is removed, the mounting block (41) can be inserted into the long groove (211) from one side of the sealing gasket (213), so that the corrugated insulating curtain (42) is located in the long groove (211).

8. The low-voltage branch box according to claim 2, characterized in that: The inner box (2) is made of insulating and thermally conductive material. The outer box (3) has heat dissipation holes (31). A heat dissipation channel (13) is formed between the inner box (2) and the outer box (3). The outer box (3) is provided with an anti-corrosion coating.

9. The low-voltage branch box according to claim 1, characterized in that: The mounting rail (24) is equipped with a surge protector (253) and a tap terminal (254). The tap terminal (254) adopts a bolt double-locking structure, and each tap terminal (254) is equipped with a transparent insulating cover (2541).

10. The low-voltage branch box according to claim 9, characterized in that: The tap terminal (254) includes a connector with an anti-oxidation coating on its surface and the connectors are arranged in color according to phase sequence.

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