Outdoor pole-mounted integrated distribution box

Abstract

The application relates to an outdoor pole-mounted comprehensive distribution box, and relates to the technical field of electrical equipment, which comprises a box body and an electrical element mounting cavity, a self-adapting cable sealing clamp is arranged at a cable inlet of a side wall of the box body, the clamp comprises an annular base, a plurality of cantilever units and a locking nut, the annular base is fixed at the cable inlet, the plurality of cantilever units are arranged in a circumferential direction of the annular base, inner walls of a plurality of sealing blocks are surrounded to form a variable-diameter clamping channel, the locking nut is in threaded connection with the annular base, when being screwed, the cantilever units are compressed to move the sealing blocks radially inward to seal and clamp the cable, and the application also has a rainproof pipe, an elastic compensation ring, an anti-loosening structure and an adjusting mechanism and the like; the application achieves the technical effects of effectively sealing the cable inlet, preventing rainwater, dust and the like from entering the inside of the distribution box, protecting electrical elements, dynamically adjusting cable clamping pre-tightening force according to environmental temperature, and ensuring that the sealing effect is stable and reliable.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and in particular to an outdoor pole-mounted integrated distribution box. Background Technology

[0002] In the field of electrical equipment technology, outdoor pole-mounted integrated distribution boxes play a crucial role, serving as key facilities for ensuring the stable operation of outdoor power systems. With the rapid development of the power industry, outdoor electricity demand is constantly increasing, placing higher demands on the performance and reliability of distribution boxes. Distribution boxes must not only provide a safe and stable installation environment for electrical components but also ensure reliable cable connections and sealing to prevent damage to the electrical system from external factors. A high-performance outdoor pole-mounted integrated distribution box can effectively reduce the probability of malfunctions, improve the stability of power supply, and guarantee normal production and daily life electricity use.

[0003] In related technologies, to solve the sealing problem of cable inlets at integrated distribution boxes on outdoor poles, a multi-specification gland joint method is commonly used. This method requires preparing corresponding gland joints according to different cable specifications, and careful selection of the appropriate specification is necessary during installation. Alternatively, a traditional sealing ring method is used, where the sealing ring is fitted onto the cable and then installed at the cable inlet of the distribution box, relying on the elasticity of the ring to achieve a seal. Another method uses sealing filler, filling the gap between the cable and the cable inlet to achieve a seal.

[0004] However, the use of multiple cable gland sizes complicates spare parts management, requiring the stocking of various sizes and increasing inventory costs and management difficulty. Furthermore, selecting the appropriate cable gland size during installation is challenging and prone to errors. Traditional sealing rings and fillers often provide insufficient sealing, are difficult to adapt to cables of different diameters, and their sealing performance tends to deteriorate over time and with environmental changes, failing to provide a reliable and universal cable inlet sealing solution for distribution boxes. Summary of the Invention

[0005] The purpose of this application is to overcome the above-mentioned technical problems and provide an outdoor pole-mounted integrated power distribution box.

[0006] An outdoor pole-mounted integrated distribution box includes a box body and an electrical component mounting cavity. A cable inlet is provided on the side wall of the box body, and an adaptive cable sealing clamp is installed at the cable inlet. The adaptive cable sealing clamp includes: The annular base, fixed at the cable inlet, has an axially through main hole; Multiple cantilever units are evenly arranged around the circumference of the annular base. Each cantilever unit includes a cantilever beam and a sealing block. The first end of the cantilever beam is fixed to the annular base and extends in a direction approximately parallel to the axis of the main through hole. The sealing block is connected to the second end of the cantilever beam. The inner walls of the multiple sealing blocks form a variable-diameter clamping channel. A locking nut is threaded to an annular base and has a tapered inner wall that expands outward toward the outside of the housing. When the locking nut is tightened, its conical inner wall presses against the cantilever unit, causing the cantilever beam to bend elastically and drive all the sealing blocks to move radially inward in sync, so as to shrink the clamping channel and seal the clamping cable.

[0007] By adopting the above technical solution, the transformation from "passively matching cable specifications" to "actively adapting to cable diameter" has been realized. A single clamp can steplessly adjust and reliably seal any cable within a diameter range, solving the problems of complex spare parts management, difficult installation selection, and high inventory costs in traditional solutions. It provides a universal, efficient, and robust cable inlet sealing solution for outdoor distribution boxes.

[0008] Optionally, the annular base is connected to the outer wall of the box via a fixed flange on its outer edge, and a first sealing element is sandwiched between the fixed flange and the outer wall of the box; a downward-curved rainproof pipe is also connected to the fixed flange, and the inner cavity of the rainproof pipe is connected to the main through hole.

[0009] By adopting the above technical solution, an adaptive cable sealing clamp is installed at the cable inlet. One clamp can steplessly adjust and reliably seal any cable within a diameter range, solving the problems of complex spare parts management, difficult installation selection, and high inventory costs of traditional solutions. The annular base is connected to the outer wall of the box through a fixed flange, and a first sealing element is sandwiched between the fixed flange and the outer wall of the box, establishing the first static sealing barrier to prevent moisture from entering through the installation gaps. A downward-curved rainproof pipe is connected to the fixed flange, and its inner cavity is connected to the main through hole, forming a physical guide and barrier to divert rainwater, dust, etc. away from the cable inlet, preventing them from directly washing over or accumulating at the inlet, thus improving the protection capability of the distribution box under severe weather conditions.

[0010] Optionally, the width and / or thickness of the cantilever beam gradually decreases from the first end to the second end; the sealing block has an annular sealing rib protruding towards the inner wall of the clamping channel, and the opposite sides of two adjacent sealing blocks are mutually cooperating inclined surfaces.

[0011] By adopting the above technical solutions, in the case of integrated distribution boxes on outdoor poles, the cantilever beam variable cross-section design results in more uniform stress distribution, a larger elastic deformation range, and greater durability, ensuring long-term reliable adaptive operation. The annular sealing ribs on the sealing block generate extremely high local pressure when radially clamped, effectively embedding or filling uneven areas of the cable sheath, forming a high-pressure first radial seal. The inclined surfaces of adjacent sealing blocks automatically tighten when they converge, forming a continuous second end-face seal. The synergistic effect of these two seals achieves a "1+1>2" sealing efficiency, helping to achieve and maintain a high protection level over the long term. Furthermore, as the main solution demonstrates, it also allows for stepless adjustment of a single clamp and reliable sealing of any cable within a certain diameter range, solving the problems of complex spare parts management, difficult installation selection, and high inventory costs, providing a universal, efficient, and robust cable inlet sealing solution.

[0012] Optionally, the second end of the cantilever beam is provided with a spherical block, and the sealing block is provided with a ball socket that engages with the connecting part.

[0013] By adopting the above technical solution, the snap-fit ​​between the spherical block and the socket achieves a fast, stable connection and precise alignment between the cantilever beam and the sealing block, ensuring a direct force transmission path. Furthermore, the spherical fit allows the sealing block to produce a slight adaptive swing within a certain angle, enabling the sealing ribs on its inner wall to better fit the slightly eccentric or irregular cable surface, thus improving the adaptability and uniformity of the seal.

[0014] Optionally, it also includes elastic compensation rings fitted around multiple cantilever beams, which provide the cantilever beams with an initial preload toward the clamping channel.

[0015] By adopting the above technical solution, a single clamp can be steplessly adjusted and reliably sealed for any cable within a diameter range, solving the problems of complex spare parts management, difficult installation selection, and high inventory costs associated with traditional solutions. At the same time, the elastic compensation ring can continuously apply a constant axial elastic preload, offsetting the stress relaxation of the sealing block rubber material under long-term pressure, partially compensating for the slight dimensional changes of each component caused by temperature cycling, ensuring that the sealing contact pressure on the cable does not significantly decrease over time, and guaranteeing the long-term stability of the sealing effect.

[0016] Optionally, the locking nut is provided with an anti-loosening structure, which includes an anti-loosening ring connected to the locking nut, and an anti-loosening plate extending into the threaded engagement between the locking nut and the annular base.

[0017] By adopting the above technical solution, an adaptive cable sealing clamp is installed at the cable inlet, which allows a single clamp to be steplessly adjusted and reliably seal any cable within a certain diameter range. This solves the problems of complex spare parts management, difficult installation selection, and high inventory costs associated with traditional solutions. The anti-loosening plate inserted into the threaded mating pair in the anti-loosening structure increases the frictional resistance between the threaded pairs, forming a mechanical self-locking effect. This prevents the locking nut from loosening due to long-term environmental vibration, ensuring that the clamping force and sealing effect set by the initial tightening torque are reliably maintained throughout the entire life cycle of the equipment.

[0018] Optionally, an adjustment mechanism is also included, which includes a mounting ring disposed on the conical inner wall of the locking nut and a plurality of elastic elements disposed corresponding to each sealing block; the elastic elements include bimetallic strips, which deform according to changes in ambient temperature to drive the sealing blocks to move radially along the clamping channel, thereby dynamically adjusting the clamping preload on the cable.

[0019] By adopting the above technical solution, an adaptive cable sealing clamp is installed on the integrated distribution box on the outdoor pole to achieve adaptive sealing of the cable. The adjustment mechanism can directly sense changes in ambient temperature. When the temperature drops, the bimetallic strip bends to generate additional force to actively compensate for the decrease in sealing pressure caused by material contraction. When the temperature rises, the reverse action releases excessive compressive stress to prevent excessive compression of the seal or damage to the cable. This achieves fully passive and intelligent temperature-pressure adaptive regulation without external energy or sensors, solving the problem of maintaining sealing reliability in a wide temperature range outdoor environment.

[0020] Optionally, the mounting ring has an annular groove, and each elastic element is disposed in the annular groove and acts on the back of the corresponding sealing block away from the clamping channel.

[0021] By adopting the above technical solution, a high degree of integration and modular installation of the adjustment mechanism is achieved, allowing the temperature compensation function to be conveniently added or maintained as a compact unit without interfering with the main sealing structure. This improves the product's manufacturability, assembly convenience, and maintainability. It can also directly sense changes in ambient temperature, actively compensating for the decrease in sealing pressure caused by material contraction when the temperature drops, and releasing excessive compressive stress when the temperature rises, preventing excessive compression of the seals or cable damage. This achieves fully passive, intelligent temperature-pressure adaptive regulation without external energy or sensors. It enables adaptive, uniform, and highly sealing clamping and long-term locking of cables, solving the problems of complex spare parts management, difficult installation selection, and high inventory costs associated with traditional solutions.

[0022] Optionally, the number of cantilever units can be six or eight.

[0023] By adopting the above technical solution, the number of six or eight cantilever units achieves the optimal engineering balance between sealing uniformity, structural stiffness, material cost and spatial layout. This is sufficient to ensure the formation of a near-circular uniform clamping force distribution, while avoiding an overly complex or bulky structure, thus ensuring the best overall competitiveness of the solution in terms of performance and cost.

[0024] Optionally, a second seal is provided between the rainproof pipe and the fixed flange.

[0025] By adopting the above technical solution, the second sealing element sandwiched between the rainproof pipe and the fixed flange effectively seals the potential water seepage gaps at the connection between the two, and together with the first sealing element, it forms a more complete multi-redundant moisture-proof and waterproof system, further enhancing the overall cable entry system's defense capabilities in extremely humid or rainy environments.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. A single clamp can steplessly adjust and reliably seal any cable within a diameter range, solving the problems of complex spare parts management, difficult installation selection, and high inventory costs in traditional solutions, and providing a universal cable inlet sealing solution for outdoor distribution boxes; 2. By using the first seal between the fixed flange and the outer wall of the enclosure and the downward-curved rainproof pipe, a static sealing barrier and a physical flow-guiding barrier are established, which improves the protection capability of the distribution box under severe weather conditions; 3. The variable cross-section design of the cantilever beam makes the stress distribution more uniform, the elastic deformation range larger and more durable. The annular sealing ribs and inclined surfaces of the sealing block form a double seal, which improves the sealing performance. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application; Figure 2 This is a structural schematic diagram of Embodiment 1 of this application, mainly showing the cable inlet; Figure 3 This is an exploded structural diagram of Embodiment 1 of this application, mainly illustrating the adaptive cable sealing clamp; Figure 4 This is a structural schematic diagram of Embodiment 1 of this application, mainly showing the first sealing element; Figure 5 This is a structural schematic diagram of Embodiment 1 of this application, mainly showing the mounting groove; Figure 6 This is a structural schematic diagram of Embodiment 1 of this application, mainly showing the docking groove; Figure 7 This is a structural schematic diagram of Embodiment 1 of this application, mainly showing the locking nut; Figure 8This is a structural schematic diagram of Embodiment 2 of this application, mainly illustrating the adjustment mechanism; Figure 9 yes Figure 8 A magnified view of part A in the diagram.

[0028] Figure Descriptions: 1. Housing; 2. Mounting cavity; 3. Cable inlet; 4. Annular base; 5. Cantilever unit; 501. Cantilever beam; 502. Sealing block; 503. Spherical block; 504. Sealing rib; 505. Elastic compensation ring; 6. Locking nut; 601. Drive unit; 602. Adjustment unit; 7. Main through hole; 8. Mounting groove; 9. Connecting groove; 10. Mounting ring; 11. Connecting plate; 12. Bimetallic strip; 13. Fixed flange; 14. First seal; 15. Rainproof pipe; 16. Second seal; 17. Anti-loosening ring; 18. Anti-loosening plate. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1 - Appendix Figure 9 This application will be described in further detail below. Example 1

[0030] An outdoor pole-mounted integrated distribution box, referring to Figure 1 , Figure 2 The distribution box includes a housing 1, an electrical component mounting cavity 2 within the housing 1, a cable inlet 3 on the side wall of the housing 1, and an adaptive cable sealing clamp located at the cable inlet 3. The adaptive cable sealing clamp, located at the cable inlet 3, is used to adjust and effectively seal any cable within a certain diameter range. This solves the problems of complex spare parts management and difficult installation selection caused by the wide variety of cable specifications in outdoor projects, providing a universal, reliable, and maintenance-free sealing solution for the cable inlet 3 of the distribution box.

[0031] Reference Figure 2 , Figure 3 , Figure 4 The adaptive cable sealing clamp includes an annular base 4, multiple cantilever units 5, and a locking nut 6. The annular base 4 is inserted into the cable inlet 3 and fixed to the surface of the housing 1 by screws. Multiple cantilever units 5 are inserted into the annular base 4 and are evenly arranged circumferentially along the annular base 4. The locking nut 6 is sleeved on the multiple cantilever units 5 and drives the multiple cantilever units 5 to clamp the cable by sliding axially along the annular base 4.

[0032] The annular base 4 has an axially penetrating main through hole 7, which is coaxially arranged with the cable inlet 3. The external cable passes through the main through hole 7 and enters the interior of the enclosure 1. A fixing flange 13 is integrally formed on the periphery of one end of the annular base 4 outside the enclosure 1. The fixing flange 13 includes a first connecting part parallel to the side of the enclosure 1 and a second connecting part parallel to the axial direction of the annular base 4, wherein the second connecting part is located at the outer edge of the first connecting part.

[0033] An annular sealing groove is provided on the first connecting part of the fixed flange 13, surrounding the first connecting holes distributed outside the sealing groove. Screws are inserted into the first connecting holes. The annular base 4 is fixedly connected to the housing 1 by the screws. In addition, a first sealing element 14 is installed in the sealing groove. After the annular base 4 is installed in place, the first sealing element 14 abuts against the bottom of the sealing groove and the outer surface of the housing 1, thereby preventing rainwater from entering the housing 1 through the gap between the annular base 4 and the cable inlet 3.

[0034] A rainproof pipe 15 is fitted over the second connecting part of the fixed flange 13, and the rainproof pipe 15 is fixedly connected to the second connecting part by screws. The rainproof pipe 15 is a hollow pipe that curves towards the ground, and its inner cavity is in fluid communication with the main through-hole 7, thereby preventing external rainwater from entering the housing 1 through the transverse main through-hole 7. Furthermore, a second sealing element 16 is clamped between the rainproof pipe 15 and the second connecting part to prevent external rainwater from flowing in through the gap between the rainproof pipe 15 and the second connecting part.

[0035] Reference Figure 2 , Figure 4 , Figure 5 The annular base 4 has six mounting slots 8 on its flat end face facing the mounting cavity 2. The six mounting slots 8 are evenly distributed around the main through hole 7, and a cantilever unit 5 is inserted into each mounting slot 8. The annular base 4 has six mating holes on its outer surface inside the mounting cavity 2, which are corresponding to the mounting slots 8. These holes are used to pass screws through and fix the cantilever unit 5 to the annular base 4.

[0036] The cantilever unit 5 includes a metal cantilever beam 501 and a rubber sealing block 502 mounted on the cantilever beam 501. The first end of the cantilever beam 501 is inserted into the mounting groove 8 of the annular base 4 and is fixedly connected to the annular base 4 by screws. The first end of the cantilever beam 501 extends away from the annular base 4 and close to its central axis; this extended end is the second end. Furthermore, the width and thickness of the cantilever beam 501 gradually decrease from its first end to its second end, thereby giving the cantilever beam 501 elasticity.

[0037] Reference Figure 5 , Figure 6A spherical block 503 is integrally formed at the second end of the cantilever beam 501, and the spherical block 503 is used to engage with the sealing block 502. The sealing block 502 has a mating groove 9, and the bottom of the mating groove 9 has a ball-and-socket socket that matches the spherical block 503. The cantilever beam 501 extends into the mating groove 9, with its outer surface abutting against the inner wall of the mating groove 9, and the spherical block 503 extends into the ball-and-socket socket. This secures the sealing block 502 and the cantilever beam 501 in a locking and fixing manner.

[0038] The inner walls of the six sealing blocks 502 together form a clamping channel with a variable diameter. Each sealing block 502 has multiple annular sealing ribs 504 integrally formed on its inner wall facing the clamping channel, and abuts against the outer wall of the cable through the sealing ribs 504. At the same time, the opposite sides of two adjacent sealing blocks 502 are set as mutually cooperating inclined surfaces, so that when all the sealing blocks 502 move radially inward and converge, the inclined surfaces between two adjacent sealing blocks 502 are pressed tightly against each other.

[0039] Reference Figure 4 , Figure 5 The six cantilever beams 501 are fitted with the same elastic compensation ring 505, which is used to provide axial elastic preload to the cantilever beams 501, so that the sealing blocks 502 on the cantilever beams 501 can have an initial elastic force to compress the cable surface, thereby preventing the cable from slipping during cable installation.

[0040] Reference Figure 4 The locking nut 6 has a secondary through hole communicating with the main through hole 7, and the inner wall of the secondary through hole is provided with a driving part 601 and an adjusting part 602. The adjusting part 602 has an internal thread, and the outer periphery of the annular base 4 within the mounting cavity 2 has an external thread that mates with the internal thread. The locking nut 6 is connected to the annular base 4 through the threaded engagement of the internal and external threads. The driving part 601 has a smooth surface and is configured as a conical surface that expands towards the side wall of the housing 1 where the annular base 4 is located. Six cantilever beams 501 pass through the secondary through hole, causing the sealing blocks 502 to abut against the inner wall of the driving part 601. When the locking nut 6 is tightened and slides towards the annular base 4, its inner conical surface simultaneously presses against all the sealing blocks 502 and the cantilever beams 501, causing the cantilever beams 501 to undergo elastic bending deformation, and the sealing blocks 502 to move synchronously inward along the radial direction of the main through hole 7, thereby reducing the diameter of the clamping channel and sealing and clamping the cable.

[0041] Reference Figure 3 , Figure 7 A locking nut 6 is fixedly connected to an anti-loosening ring 17 at one end near the annular base 4. Multiple anti-loosening plates 18 are integrally formed on the anti-loosening ring 17. The anti-loosening plates 18 extend into the threaded mating part between the annular base 4 and the locking nut 6, thereby improving the tightness of the locking nut 6.

[0042] The implementation principle of Embodiment 1 of this application is as follows: During installation, the cable is passed through the rainproof pipe 15, the main through hole 7 of the annular base 4, and the clamping channel formed by the sealing blocks 502. The locking nut 6 is tightened, causing it to move axially (towards the housing 1) along the annular base 4. The conical inner wall of the locking nut 6 then presses against the sealing blocks 502 of each cantilever unit 5 and the second end of the cantilever beam 501. Since the first end of the cantilever beam 501 is fixed and the beam body is elastic, it undergoes elastic bending deformation towards the central axis of the clamping channel under the action of external force. This deformation drives all the sealing blocks 502 to move smoothly inward radially in strict synchronization. The annular sealing ribs 504 on the inner wall of the sealing block 502 first tightly bite against the cable surface, forming the first radial seal; at the same time, the mating inclined surfaces of adjacent sealing blocks 502 press against each other during the convergence process, forming a continuous ring of secondary end face seals, completely blocking the path of moisture intrusion from the gaps between the blocks. The axial preload provided by the elastic compensation ring 505 ensures immediate clamping and initial sealing force, while the anti-loosening ring 17 effectively counteracts nut loosening caused by vibration. Thus, through a single tightening action, adaptive, uniform, and highly sealing clamping and long-term locking of the cable are achieved. Example 2

[0043] An outdoor pole-mounted integrated distribution box, referring to Figure 8 , Figure 9 Based on Embodiment 1, it is provided with an adjustment mechanism, which includes a mounting ring 10 and six elastic elements.

[0044] The mounting ring 10 is made of rubber, and its outer ring is fixed to the driving part 601 of the locking nut 6 by adhesive. The mounting ring 10 has an annular groove, and the opening of the annular groove is located on the side of the mounting ring 10 away from the annular base 4. In addition, there are six connecting grooves in the annular groove, each corresponding to a sealing block 502. Six elastic elements are inserted into the corresponding annular grooves and act on the corresponding sealing blocks 502.

[0045] The elastic element includes two connecting plates 11 and a bimetallic strip 12 fixedly connected between the two connecting plates 11. The connecting plates 11 are inserted into corresponding connecting grooves. The bimetallic strip 12 can automatically undergo controllable bending deformation according to changes in ambient temperature, thereby controlling the axial movement of the connecting plates 11 towards the corresponding sealing block 502 and dynamically adjusting the connection preload. Its effect is to intelligently compensate for the thermal expansion and contraction of materials caused by temperature changes: actively increasing the preload at low temperatures to prevent loosening, and appropriately releasing stress at high temperatures to prevent excessive compression, ensuring consistent sealing performance under different climatic conditions.

[0046] The implementation principle of Embodiment 2 of this application is as follows: Based on the mechanical adaptive sealing achieved in Embodiment 1, an intelligent feedback mechanism for ambient temperature is further introduced through an adjustment mechanism. Each elastic element of the adjustment mechanism (with the bimetallic strip 12 as its core) is pre-installed on the mounting ring 10 on the inner wall of the locking nut 6, and respectively abuts against the back of each sealing block 502. When the ambient temperature drops, the bimetallic strip 12, due to the difference in thermal expansion coefficients of its two metal layers, undergoes a specific bending deformation (e.g., bulging towards the sealing block 502). This deformation is converted into an additional radial inward thrust on the sealing block 502 through the mounting ring 10 and the elastic element body, thereby actively compensating for material shrinkage and sealing pressure attenuation caused by low temperature, preventing leakage. Conversely, when the ambient temperature rises, the bimetallic strip 12 undergoes a reverse bending deformation (e.g., retracting away from the sealing block 502), appropriately releasing the clamping force on the sealing block 502, avoiding excessive compression, stress relaxation, or damage to the cable insulation layer of the rubber sealing block 502 due to overheating. This process is completely passive and spontaneous, requiring no external energy or control, enabling the sealing system to intelligently self-regulate pressure over a wide temperature range, ensuring the long-lasting, stable, and reliable sealing performance under extreme climatic conditions.

[0047] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. An outdoor pole-mounted integrated power distribution box, comprising a box body (1) and an electrical component mounting cavity (2), characterized in that, The side wall of the enclosure (1) is provided with a cable inlet (3), and an adaptive cable sealing clamp is installed at the cable inlet (3); The adaptive cable sealing clamp includes: The annular base (4) is fixed at the cable inlet (3) and has an axially penetrating main through hole (7); Multiple cantilever units (5) are evenly arranged around the circumference of the annular base (4). Each cantilever unit (5) includes a cantilever beam (501) and a sealing block (502). The first end of the cantilever beam (501) is fixed to the annular base (4) and extends in a direction approximately parallel to the axis of the main through hole (7). The sealing block (502) is connected to the second end of the cantilever beam (501). The inner walls of the multiple sealing blocks (502) form a variable-diameter clamping channel. A locking nut (6) is threaded to the annular base (4), the locking nut (6) having a tapered inner wall that expands outward toward the outer side of the housing (1); When the locking nut (6) is tightened, its conical inner wall presses against the cantilever unit (5), causing the cantilever beam (501) to bend elastically and drive all the sealing blocks (502) to move radially inward in sync, so as to shrink the clamping channel and seal the clamping cable. The annular base (4) is connected to the outer wall of the box (1) through a fixed flange (13) on its outer edge. A first sealing element (14) is sandwiched between the fixed flange (13) and the outer wall of the box (1). A downwardly bent rainproof pipe (15) is also connected to the fixed flange (13). The inner cavity of the rainproof pipe (15) is connected to the main through hole (7). The width and / or thickness of the cantilever beam (501) gradually decreases from the first end to the second end; the sealing block (502) has an annular sealing rib (504) protruding towards the inner wall of the clamping channel, and the opposite sides of two adjacent sealing blocks (502) are mutually cooperating inclined surfaces. The second end of the cantilever beam (501) is provided with a spherical block (503), and the sealing block (502) is provided with a ball socket that engages with the spherical block (503); It also includes an elastic compensation ring (505) sleeved on the outside of the plurality of cantilever beams (501), the elastic compensation ring (505) providing the cantilever beams (501) with an initial preload toward the clamping channel; It also includes an adjustment mechanism, which includes a mounting ring (10) disposed on the conical inner wall of the locking nut (6) and a plurality of elastic elements disposed corresponding to each of the sealing blocks (502); The elastic element includes a bimetallic strip (12), which deforms according to changes in ambient temperature to drive the sealing block (502) to move radially along the clamping channel, thereby dynamically adjusting the clamping preload on the cable. The mounting ring (10) has an annular groove, and each of the elastic elements is disposed in the annular groove and acts on the back side of the corresponding sealing block (502) away from the clamping channel.

2. The outdoor pole-mounted integrated power distribution box according to claim 1, characterized in that, The number of cantilever units (5) is six or eight.

3. The outdoor pole-mounted integrated power distribution box according to claim 1, characterized in that, A second sealing element (16) is sandwiched between the rainproof pipe (15) and the fixed flange (13).

Images