Outdoor control cabinet

Abstract

This invention relates to the field of power distribution equipment technology, specifically disclosing an outdoor control cabinet, including a box body. The bottom of the box body has an inlet and an outlet cable. A lifting seat is slidably mounted on the inner wall of the box body. A lifting mechanism for controlling the lifting seat's movement is installed inside the box body. A cable clamping assembly is detachably mounted on the lifting seat. The cable clamping assembly includes a mounting frame. Left and right through holes are respectively provided on the left and right side walls of the mounting frame, corresponding one-to-one. A slider is slidably mounted in the right through hole with a clearance fit. The slider has an internal thread. A rotating cylinder is rotatably mounted on the left end of the slider. The rotating cylinders allow the conductive clamp to be easily connected to the mounting frame, facilitating the upward pulling of the main cable. Ultimately, the conductive clamp connects to the upper connector, improving efficiency and ensuring complete positioning of the conductive clamp relative to the upper connector.

Description

Technical Field

[0001] This invention relates to the field of power distribution equipment technology, specifically to an outdoor control cabinet. Background Technology

[0002] Outdoor control cabinets play a crucial role in power distribution equipment technology and related power network infrastructure applications. As a core node in power grid transformation and underground main cable distribution, outdoor control cabinets bear the critical responsibilities of power distribution, line protection, and operational status monitoring. With the rapid development of the modernization of the power industry, urban and rural power grid transformation has been fully launched, and the need for multi-circuit distribution of underground main cables over a certain distance is increasing. Therefore, using outdoor control cabinets as an important supporting equipment for power distribution is not only economical but also a convenient and safe network deployment solution. However, in actual power grid construction and daily maintenance, existing outdoor control cabinets suffer from significant problems in main cable installation and connection, including low installation efficiency, insufficient operational safety, and difficulty in ensuring connection stability. Specifically, because multiple main cables need to be threaded through the bottom of the outdoor control cabinet, and these main cables are typically large in size, thick in diameter, extremely heavy, and have high bending stiffness, construction workers face significant physical exertion and operational difficulties when threading, lifting, and aligning cables inside the narrow control cabinet. The main cables are connected side-by-side to the circuit breakers inside the cabinet. The cables need to be threaded through from below, and then manually lifted to prevent them from sliding down due to gravity. They are then returned to the top of the cabinet to connect to the circuit breaker terminals. Because it is difficult to accurately control the length of the main cable entering the control cabinet, and the cable's rigidity causes significant rebound stress, the installation process often requires repeated and laborious adjustments by the workers, greatly delaying the construction progress and increasing safety hazards. Therefore, it is necessary to introduce automated assembly guidance technology with mechanically assisted lifting and self-aligning clamping functions to improve the existing cable installation process.

[0003] Chinese patent application CN104821489A discloses a cable distribution box, including a box body, a box door, and horizontally arranged inlet busbars, outlet busbars, and ground busbars inside the box. The inlet busbars are equipped with inlet circuit breakers, and the outlet busbars are equipped with outlet circuit breakers. The inlet circuit breakers are connected to the outlet circuit breakers via busbars. Both the inlet and outlet circuit breakers are three-pole circuit breakers, and the busbars are laminated busbars. The improvement of this patent application is that connecting the inlet and outlet circuit breakers via laminated busbars reduces wiring within the box and meets the requirements for thermal and electrical stress caused by potential short circuits during operation.

[0004] Chinese patent document CN118632464B discloses an outdoor frequency converter control cabinet, belonging to the field of frequency converter control cabinets. It includes a cabinet body, with hinges fixedly connected to the front outer surface of the cabinet body. A cabinet door is hinged to the cabinet body via the hinges. A protective component is provided on the outer surface of the cabinet body. The protective component includes two sets of brackets fixedly connected to the upper outer surface of the cabinet body, arranged in a parallel left-right configuration. The brackets have a trapezoidal structure, and a protective plate is fixedly connected to the upper outer surface of each bracket. By incorporating a dehumidification component, air entering the cabinet body will fully contact the silicate gel plate, which effectively absorbs moisture from the air, significantly reducing the amount of moisture entering the cabinet body. This effectively reduces the probability of condensation forming inside the cabinet, improving the safety of the control cabinet during operation and reducing corrosion of the control cabinet and its internal electrical components caused by condensation.

[0005] The existing solution suffers from several specific defects due to the lack of mechanized assistance and adaptive docking mechanisms. First, the existing control cabinet lacks a lifting and guiding structure when installing the main cable. Construction workers must contend with the weight of the cable (tens of kilograms) and immense bending stress in an extremely awkward posture within the limited space of the open cabinet door. This not only easily leads to safety accidents such as muscle strains but also makes it difficult to lift the cable to the set elevation in one go. Second, when connecting the conductive clamp at the cable end to the upper connector of the circuit breaker inside the cabinet, there is a lack of effective pre-positioning and relative fixing structures. The manually lifted cable often sways and deviates under the influence of gravity and deformation rebound force, making it difficult to align the connection holes. Construction workers often need to struggle to stabilize the cable with one hand while performing the complex operation of inserting bolts with the other, resulting in a low success rate and a high risk of components falling. Furthermore, the control cabinet does not provide a deformation inhibition barrier for thick and stiff cables after they are raised and positioned. After the cables are connected, their own bending stress will continuously exert abnormal lateral tensile force on the circuit breaker terminals. Long-term operation can easily lead to loosening of the connection, increased contact resistance, or even serious electrical faults such as overheating and burning. These defects directly affect the overall efficiency of the distribution cabinet installation and the reliability of its subsequent operation. Summary of the Invention

[0006] This invention provides an outdoor control cabinet, which aims to solve the problem of complicated installation of main cables in related technologies.

[0007] An outdoor control cabinet includes a housing with an inlet and an outlet cable at the bottom. A lifting seat is slidably mounted on the inner wall of the housing. A lifting mechanism for controlling the lifting seat is installed inside the housing. A cable clamping assembly is detachably mounted on the lifting seat. The cable clamping assembly includes a mounting frame with a left through hole and a right through hole on the left and right side walls of the mounting frame, respectively. The left and right through holes correspond one-to-one. A slider is slidably mounted in the right through hole with clearance fit. The slider has an internal thread. A rotating cylinder is rotatably mounted on the left end of the slider. The left end face of the rotating cylinder is inclined. A rotating cylinder is clearance fit in the left through hole. The right end face of the rotating cylinder is inclined and complementary to the left end face of the rotating cylinder. An elastic element for bringing the rotating cylinder and the rotating cylinder closer together is installed in the mounting frame. The cable clamping assembly also includes a bolt adapted to the internal thread, with clearance fit between the bolt and the inner holes of the rotating cylinder and the rotating cylinder.

[0008] Its effect is as follows: the conductive clamp retracts the two rotating cylinders through the inclined surfaces of the two rotating cylinders, thereby aligning the holes of the conductive clamp with the rotating cylinders, making it convenient to install the rotating cylinders in the mounting frame. Then, the upper connector of the main circuit breaker retracts the two rotating cylinders, thereby aligning the holes of the upper connector with the rotating cylinders, thus initially connecting the conductive clamp and the upper connector together. After tightening the bolts, since the slider, rotating cylinder one, and rotating cylinder two are all clearance-fitted with the left through hole / right through hole, rotating cylinder one and rotating cylinder two are misaligned in different directions, so that rotating cylinder one and rotating cylinder two both abut against the through hole of the upper connector of the main circuit breaker. At the same time, rotating cylinder one and rotating cylinder two abut against the two through holes of the main cable conductive clamp respectively, thereby positioning the conductive clamp and the upper connector of the main circuit breaker to prevent them from shaking.

[0009] Preferably, the inner hole of the first rotating cylinder is not coaxial with the first rotating cylinder, so that the center of gravity of the first rotating cylinder is lower and the tip of the first rotating cylinder is located at the top in the initial state. The second rotating cylinder has the same structure as the first rotating cylinder.

[0010] Preferably, the lifting mechanism includes a rope and a fixed pulley. The fixed pulley is installed in the upper left corner of the housing. One end of the rope is connected to the lifting seat, and the other end is connected to the drive source. By pulling the rope, the other end of the rope pulls the lifting seat up.

[0011] Preferably, the left end of the second rotating drum is provided with a circular ring that abuts against the conductive clamp. When the conductive clamp is connected to the upper connector of the disconnecting switch, the bolt passes through the inner hole of the circular ring and engages with the internal thread, with the bolt head abutting against the circular ring. As the bolt passes through each component and begins to engage with the opposite thread, with the continuous engagement of the thread pitch, the wide nut end face of the bolt head will flatten against the surface of the circular ring. This evenly distributes the huge locking pressure applied by the bolt to the body of the second rotating drum and the subsequent clamping parts, avoiding component deformation caused by local stress concentration, ensuring that the entire electrical connection part becomes a highly dense conductive whole, and maintaining an excellent conductive contact cross section for a long time.

[0012] Preferably, the slider is a nut, and a compression spring is installed in both the left and right through holes. The compression spring abuts against the nut or ring, thereby bringing the first and second rotating cylinders closer together. The compression spring maintains a constant compressive tendency to release potential energy towards the central axis. This purely mechanical elastic pushing allows the two rotating cylinders to be inserted into the connecting hole and hooked together the moment they encounter the through hole. The slider then provides a threaded engagement point when the bolt is screwed in subsequently.

[0013] Preferably, multiple limiting mechanisms are installed on the inner wall of the enclosure. When the mounting frame passes over the limiting mechanisms, the limiting mechanisms restrict the cable from moving towards the center of the enclosure. Due to the large cross-sectional area of ​​the underground main cable, its internal metal core and multi-layer insulation sheath have strong bending stiffness. If it is not restrained inside the cabinet, it is extremely easy to arch and deform towards the center where the space is largest, encroaching on the space of other circuits or even touching the live busbar. When the mounting frame carrying the cable passes over these nodes from bottom to top, the mechanisms are activated in sequence, quickly forming a physical isolation on the outside of the cable, restraining the cable in the corner of the cabinet edge, greatly improving the appearance of the wiring process inside the cabinet, and cutting off the path of residual stress in the cable to the vulnerable terminals.

[0014] Preferably, the limiting mechanism includes a lever with one end rotatably mounted to the inner side wall of the housing. A railing perpendicular to the lever is connected to the hinge of the lever. Initially, the railing is vertical. When the mounting frame rises against the lever, the railing gradually becomes horizontal. A snap-fit ​​assembly is installed on the inner side wall of the housing. When the railing is horizontal, it snaps one end of the lever, restricting the lever from rotating downward. After the mounting frame passes the lever, the railing abuts against the inclined surface, causing the telescopic pin to retract. Finally, one end of the railing enters the slot, thereby restricting the main cable between the railing and the side wall of the housing.

[0015] Preferably, the locking assembly includes a telescopic locking pin slidably installed on the inner side wall of the box. The bottom of the telescopic locking pin is an inclined surface, and a limiting groove is opened in the middle to connect with the inclined surface. When the railing rotates, the railing abuts against the inclined surface to retract the telescopic locking pin, and finally one end of the railing enters the limiting groove.

[0016] Preferably, a rotating sleeve is fitted onto the railing.

[0017] Preferably, the outer layer of the rotating sleeve is a flexible layer to prevent large deformation at the contact point between the main cable and the rotating sleeve.

[0018] By adopting the above technical solution, the beneficial effects of the present invention are as follows: 1. The inclined surfaces of the first and second rotating drums allow the conductive clamps to be easily connected to the mounting frame, making it easier to pull the main cable upwards. Finally, the conductive clamps are connected to the upper connector, improving installation efficiency. 2. After tightening the bolts, the first and second rotating drums are misaligned in different directions, thereby completely positioning the relative positions of the conductive clamp and the upper connector of the main circuit breaker, preventing them from shaking. 3. During the ascent of the main cable, when the mounting frame abuts against the lever, the lever and the guardrail rotate. After the mounting frame passes the lever, the guardrail abuts against the inclined surface, causing the telescopic locking pin to retract. Finally, one end of the guardrail enters the slot, thereby restricting the main cable between the guardrail and the side wall of the box. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure before the main cable is connected in this invention.

[0020] Figure 2 This is a schematic diagram of the structure of the present invention after the main cable is connected.

[0021] Figure 3 for Figure 2 A magnified structural diagram of point A in the middle.

[0022] Figure 4 This is a schematic diagram of the lifting mechanism in this invention.

[0023] Figure 5 This is a top view of the wire clamping assembly in this invention.

[0024] Figure 6 This is a cross-sectional view of the wire clamping assembly in this invention.

[0025] Figure 7 This is a front view of the initial positions of the rotating cylinders one and two in this invention.

[0026] Figure 8 This is a cross-sectional view of the conductive clip after it is connected to the upper connector in this invention.

[0027] Figure label: 1. Housing; 11. Guide rail; 111. Guide block; 2. Lifting seat; 21. Locking block; 22. Spring; 3. Lifting mechanism; 31. Fixed pulley; 32. Rope; 4. Cable clamping assembly; 41. Mounting frame; 411. Slot; 42. Rotary drum one; 421. Slider; 43. Rotary drum two; 431. Ring; 44. Elastic element; 45. Screw; 5. Limiting mechanism; 51. Telescopic locking pin; 52. Actuating rod; 53. Railing; a. Conductive clamp; b. Upper connector. Detailed Implementation

[0028] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0029] like Figure 1 and Figure 2 As shown, an outdoor control cabinet includes a housing 1, a lifting base 2, a lifting mechanism 3, and a cable clamping assembly 4. The cable clamping assembly 4 is detachably mounted on the lifting base 2. Initially, the cable clamping assembly 4 is located at the bottom of the housing 1. When the main cable is clamped onto the cable clamping assembly 4, the lifting mechanism 3 drives the lifting base 2 to rise with the cable clamping assembly 4, thereby moving the main cable upward to the top of the housing 1. Then, the cable clamping assembly 4 is removed, allowing the cable clamping assembly 4, along with the main cable connector, to connect to the main circuit breaker. The control cabinet serves as the main equipment for physically connecting and distributing power between the main external power distribution network and the internal power branch network. The internal space of the housing 1 is planned from bottom to top as an incoming wiring area and a circuit breaker assembly installation area. The lifting mechanism 3 is located in the non-electrical component wiring area on the inner wall of the housing 1, providing a vertical translation guide rail and upward power for the cable clamping assembly 4. The cable clamping assembly 4 acts as an intermediate support for the cable end, preventing the main cable from falling off when at the bottom position and serving as an alignment structure to position the main cable and the main circuit breaker when at the top position.

[0030] The bottom of enclosure 1 has inlet and outlet holes. The first row of main circuit breakers is installed inside enclosure 1, and the second row has branch circuit breakers. The main circuit breakers and branch circuit breakers are electrically connected via connecting plates. The inlet holes are located at the bottom of enclosure 1, allowing multiple external main cables to be vertically introduced into the enclosure. The lower part of the first row of main circuit breakers has an upper connector b, which serves as a stationary contact. The upper part of the second row of branch circuit breakers has corresponding inlet terminals. The connecting plates are typically copper plates with through holes at both ends, and are bolted to the output terminals of the main circuit breakers and the input terminals of the branch circuit breakers, forming a top-to-bottom current distribution path.

[0031] like Figures 5-8As shown, the cable clamping assembly 4 includes a mounting frame 41, a first rotating cylinder 42, a second rotating cylinder 43, multiple elastic elements 44, and screws 45. The left and right sidewalls of the mounting frame 41 are respectively provided with a left through hole and a right through hole, which correspond one-to-one. A slider 421 is slidably installed in the right through hole with a clearance fit. The slider 421 has an internal thread and functions as a nut. The first rotating cylinder 42 is rotatably mounted on the left end of the slider 421, and its left end face is inclined. The second rotating cylinder 43 is installed in the left through hole with a clearance fit, and its right end face is inclined and overlaps with the left end face of the first rotating cylinder 42. Complementary, the left end of the second rotating cylinder 43 is provided with a ring 431 that abuts against the conductive clamp a. The inner hole of the first rotating cylinder 42 is not coaxial with the first rotating cylinder 42, so that the center of gravity of the first rotating cylinder 42 is lower, so that the tip of the first rotating cylinder 42 is located at the top in the initial state. The second rotating cylinder 43 has the same structure as the first rotating cylinder 42. Multiple elastic elements 44 are respectively installed in the first rotating cylinder 42 and the second rotating cylinder 43. The elastic elements 44 are preferably compression springs. The slider 421 and the ring 431 abut against the compression springs respectively, so that the slider 421 and the ring 431 maintain a certain distance, so that the tips of the first rotating cylinder 42 and the second rotating cylinder 43 are close to each other. The eccentric structure of rotating cylinder 42 and rotating cylinder 43 results in uneven mass distribution. Without sufficient external static friction applied at the rotational connection between rotating cylinder 42 and slider 421, and at the sliding connection between rotating cylinder 43 and the left through hole, the rotational torque generated by gravity causes the center of gravity of the rotating cylinder to move directly below the axis of rotation. This single rotational degree of freedom restricts the initial angle of the rotating cylinder, ensuring that the beveled tip is at its highest point, forming a fixed contact surface. Elastic members 44 are located in the left and right through holes, respectively, with their axes parallel to the central axes of the left and right through holes. In their natural state, they push slider 421 and rotating cylinder 43 along the axis towards the central section of the mounting frame 41.

[0032] When the main cable is inserted through the inlet hole, the conductive clamp a on the main cable abuts against the inclined ends of the rotating drum 42 and the rotating drum 43. The conductive clamp a rises, causing the rotating drum 42 and the rotating drum 43 to retract to both sides until the connecting hole on the conductive clamp a aligns with the rotating drum 42 and the rotating drum 43. Under the action of the compression spring, the rotating drum 42 and the rotating drum 43 move closer to each other, allowing the tips of the rotating drum 42 and the rotating drum 43 to enter the connecting hole. Then, the main cable is released, so that the top of the connecting hole of the conductive clamp a abuts against the rotating drum 42 and the rotating drum 43, preventing the main cable from falling. After all the conductive clamps a on the main cables are installed, the lifting mechanism 3 drives the lifting seat 2 to rise to the top with the mounting frame 41. Then, the mounting frame 41 is removed and connected to the upper connector b of the main circuit breaker. Then, the main cable is shaken. Under the action of gravity, the inclined surfaces of the rotating drum 42 and the rotating drum 43 face downwards, and the upper connector b of the main circuit breaker is inserted into the groove between the cable conductive clamps a. Inside, rotating drum 42 and rotating drum 43 retract to both sides. When the through hole on the upper connector b of the main circuit breaker aligns with the connection hole on the conductive clamp a, rotating drum 42 and rotating drum 43 approach each other under the action of the compression spring and enter the through hole on the upper connector b of the main circuit breaker. Finally, a bolt is inserted from rotating drum 43. After the bolt and nut engage, rotating the bolt brings rotating drum 42 and rotating drum 43 closer together, so that the inclined surface of rotating drum 42 abuts against the inclined surface of rotating drum 43. Tighten. After tightening the bolts, since the slider 421, rotating drum 42, and rotating drum 43 are all clearance-fitted with the left / right through hole, rotating drum 42 and rotating drum 43 are misaligned in different directions. This causes rotating drum 42 and rotating drum 43 to abut against the through hole of the upper connector b of the main circuit breaker. At the same time, rotating drum 42 and rotating drum 43 abut against the two through holes of the main cable conductive clamp a, thereby completely positioning the conductive clamp a and the upper connector b of the main circuit breaker and preventing them from shaking.

[0033] When the conductive clamp a pushes upward against the inclined surface of the rotating cylinder, the inclined surface structure decomposes the vertical upward thrust into a horizontal component. This horizontal component overcomes the elastic force of the elastic element 44, forcing the rotating cylinder 42 and the rotating cylinder 43 to undergo lateral displacement along the axial direction, increasing the lateral distance between them, allowing the conductive clamp a to enter the center of the mounting frame 41. When the mounting frame 41 is snapped into place at the upper connector b of the main circuit breaker, the snapping action changes the orientation of the mounting frame 41, causing the center of gravity of the rotating cylinder to deflect. When the upper connector b cuts downward, the horizontal displacement force mechanism is triggered again. During the tightening of the bolts, the ring 431 and the slider 421 move closer to the center under the axial tension of the thread. When the inclined surfaces of the rotating cylinder 42 and the rotating cylinder 43 meet and are squeezed, due to the tolerance gap between the outer diameter of each component and the inner diameter of the through hole, the axial force causes the rotating cylinder to undergo uneven slight deflection and tilting angles in its circumferential direction. At this point, the outer cylindrical surfaces of rotating cylinder 42 and rotating cylinder 43 form an interference fit at three contact points: one side presses against the inner wall of its own through hole, the middle section presses against the inner wall of the through hole of the upper connector b, and the other section presses against the inner wall of the through hole of the conductive clamp a. The simultaneous contact of these three points utilizes the mechanical locking effect, consumes all the fit clearance, cuts off the translational and rotational degrees of freedom of the connector assembly in the X, Y, and Z coordinate axes, and makes the conductive clamp a and the upper connector b form a rigid connection structure.

[0034] like Figure 1 , Figure 2 and Figure 4 As shown, the lifting mechanism 3 includes two fixed pulleys 31 and two ropes 32 installed at the top inside the housing 1. The two ropes 32 are respectively wound around the two fixed pulleys 31. One end of the rope 32 passes through the lifting seat 2 and the bottom of the housing 1, and the other end is connected to the lifting seat 2. A vertical guide rail 11 is provided on the inner side wall of the housing 1. The lifting seat 2 is slidably installed in the guide rail 11. Pulling one end of the rope 32 passing through the bottom causes the other end of the rope 32 to lift the lifting seat 2, thereby causing the cable clamping assembly 4 to lift the main cable. The cross-sectional shape of the guide rail 11 matches and engages with the groove shape of the edge of the lifting seat 2. Through surface contact, the displacement of the lifting seat 2 in all directions except parallel to the length direction of the guide rail 11 is restricted, ensuring that the lifting path remains in a vertical plane. The fixed pulleys 31 change the direction of force, converting the downward pulling force of the operator at the bottom of the housing 1 into an upward traction force at the other end of the rope 32. Rope 32 runs along the inner wall corner of the box 1, physically isolating its movement trajectory from the main circuit breaker installed in the central area and the reserved space for the main line below it, preventing rope 32 from interfering with the normal laying of the line during the lifting process.

[0035] like Figure 4 , Figure 6 and Figure 7As shown, a locking block 21 is slidably mounted on the lifting seat 2. The top of the locking block 21 is provided with a protrusion. A spring 22 is connected between the locking block 21 and the lifting seat 2. An L-shaped slot 411 is opened on the side of the mounting frame 41 near the lifting seat 2. A guide block 111 for moving the locking block 21 is provided at the top of the guide rail 11. When the lifting seat 2 is at the bottom, the locking block 21 is located in the slot 411. The protrusion is locked against the inner wall of the slot 411, so that the mounting frame 41 is locked onto the lifting seat 2. When the lifting seat 2 moves to the top of the guide rail 11, a damping mechanism (not shown in the figure, but may be a friction damping structure) is provided between the guide rail 11 and the lifting seat 2. This gives the lifting seat 2 a large friction force when it is at the top, preventing the lifting seat 2 from falling freely. The guide block 111 abuts against the locking block 21, causing the locking block 21 to slide in the slot 411, so that the protrusion is disengaged from the inner wall of the slot 411, and the mounting frame 41 can be removed from the lifting seat 2. The L-shaped slot 411 includes a horizontal slot and a vertical recess that communicates with the horizontal slot. With the spring 22 releasing its thrust, the locking block 21 horizontally inserts into the horizontal slot of the slot 411, with its top protrusion entering the vertical recess. Due to the interference fit between the overlapping areas of the protrusion and the recess, the freedom of the mounting frame 41 to move horizontally outward relative to the lifting seat 2 is restricted, thus achieving fixed mounting. The guide block 111 is a rigid component fixed to the upper end of the guide rail 11, with a downward-facing ramp. As the lifting seat 2 rises to its highest point, the end face of the locking block 21 slides onto the ramp of the guide block 111. The ramp generates a horizontal force, which pushes the locking block 21 back to compress the spring 22, causing the protrusion to completely exit the vertical recess and return to the horizontal slot, thus releasing the mechanical lock that allows horizontal movement. This structure automatically converts the displacement of the lifting seat 2 into an unlocking action, eliminating the need to trigger other switching components separately.

[0036] like Figures 1-4 As shown, in order to keep the main cable close to the inside of the box 1, multiple limiting mechanisms 5 are installed on the inner side wall of the box 1. The limiting mechanism 5 includes a telescopic pin 51 (preferably a spring pin), a lever 52 and a railing 53. The lever 52 is rotatably connected to the inner side wall of the box 1, and the railing 53 is fixedly connected to the lever 52 and the two are perpendicular to each other. A rotating sleeve is sleeved on the railing 53. The outer layer of the rotating sleeve is a flexible layer (the flexible layer material can be rubber). The lever 52 is initially horizontal. The bottom of the telescopic pin 51 is inclined, and a limiting groove is opened in the middle to connect with the inclined surface. When the mounting frame 41 abuts against the lever 52, the lever 52 and the railing 53 rotate. After the mounting frame 41 passes the lever 52, the railing 53 abuts against the inclined surface, causing the telescopic pin 51 to retract. Finally, one end of the railing 53 enters the limiting groove, thereby restricting the main cable between the railing 53 and the side wall of the box 1. The rotation axis of the lever 52 is parallel to the back plate plane of the housing 1 and perpendicular to the side wall plane. In the initial state, the axial direction of the railing 53 is parallel to the lifting guide rail 11. When the mounting frame 41 moves upward and contacts the bottom surface of the lever 52, it drives the lever to rotate 90 degrees upward around the hinge axis. At this time, the railing 53, which is perpendicular to it, rotates 90 degrees synchronously, flipping from the vertical state to the horizontal state, forming a blocking member spanning the outside of the cable. The telescopic latch 51 is arranged in a horizontal direction perpendicular to the side wall and is maintained in the extended state by an internal compression spring. At the end of the flip of the railing 53, its cylindrical outer surface slides and presses against the inclined surface at the bottom of the telescopic latch 51, causing the telescopic latch 51 to retract along its axis into the side wall. When the railing 53 continues to rotate past the inclined surface and reaches the height of the limiting groove, the telescopic latch 51 resets and pops out, and the upper, lower, and outer walls of the limiting groove surround one end of the railing 53. The inner edge of the limiting groove becomes a rigid stop surface, preventing the railing 53 from rotating back in the opposite direction. This reverse locking mechanism can withstand the outward thrust generated by the cable rebound. The inner diameter of the rotating sleeve is larger than the outer diameter of the railing 53, and there is an assembly gap between the two. When the cable sheath contacts the rotating sleeve and generates tangential relative motion, the frictional torque drives the rotating sleeve to rotate concentrically around the railing 53, converting the sliding friction between the two into sliding friction between the rotating sleeve and the railing 53 and rolling friction on the outer surface.

[0037] Working principle: When the main cable is inserted, the conductive clamp a rises, causing the rotating drum 42 and rotating drum 43 to retract to both sides until the connecting hole on the conductive clamp a aligns with the rotating drum 42 and rotating drum 43. Then, the main cable is released, and the rotating drum 42 and rotating drum 43 return to their original positions to prevent the main cable from falling. After all the conductive clamps a for the main cables are installed, the rope 32 passing through the bottom of the box 1 is pulled manually to raise the lifting seat 2. When the lifting seat 2 moves to the top of the guide rail 11, the guide block 111 abuts against the locking block 21, causing the locking block 21 to slide in the locking groove 411, thereby causing the protrusion to disengage from the inner wall of the locking groove 411. Then, the mounting frame 41 is removed and inverted. Due to the restriction of the main cable by the railing 53, the upper part of the main cable bends, and the conductive clamp a approaches the upper connector b of the main circuit breaker, causing it to sway. When the main cable is in motion, under the action of gravity, the inclined surfaces of rotating drum 1 (42) and rotating drum 2 (43) face downwards. The upper end connector b of the main circuit breaker is inserted into the groove between the cable conductive clamps a, causing rotating drum 1 (42) and rotating drum 2 (43) to retract to both sides. When the through hole on the upper end connector b of the main circuit breaker aligns with the connection hole on the conductive clamp a, rotating drum 1 (42) and rotating drum 2 (43) approach each other under the action of the compression spring and enter the through hole on the upper end connector b of the main circuit breaker. This setting facilitates installation and alignment. Finally, a bolt is inserted from rotating drum 2 (43), and the bolt is rotated to bring rotating drum 1 (42) and rotating drum 2 (43) closer together, so that the inclined surface of rotating drum 1 (42) abuts against the inclined surface of rotating drum 2 (43). After tightening the bolt, rotating drum 1 (42) and rotating drum 2 (43) are misaligned in different directions, thereby completely positioning the relative position of the conductive clamp a and the upper end connector b of the main circuit breaker and preventing them from shaking. The entire workflow encompasses three mechanical transformation stages. In the first stage, assembly takes place in the low-lying area at the bottom of housing 1. Through the mechanical interaction between the thrust and the inclined surfaces of rotating drums 42 and 43, and utilizing the eccentric self-orienting characteristics of rotating drums 42 and 43, as well as the elastic restoring capability of the compression springs, the conductive clamp a is suspended and mounted. In the second stage, the driving force reversal and transmission stage, the fixed pulley 31 converts the vertically downward force vector at the operating point of the rope 32 into an effective vertically upward displacement of the lifting seat 2 along the guide rail 11. During this period, the mounting frame 41, in conjunction with the lever 52, completes the rotation triggering of the railing 53 and the horizontal spring-loaded self-locking of the telescopic latch 51. In the third stage, the top displacement fine-tuning and mechanical locking stage, after removing the constraint of the latch block 21, the mounting frame 41 is inverted and its posture reversed. Relying on the natural arc formed by the residual deflection of the main cable after being restricted by the railing 53, rotating drums 42 and 43 are subjected to secondary orientation by gravity, and the forced retraction mechanism triggered by the upper connector b of the main circuit breaker cutting into the inclined surface replicates the mounting action. In the final stage, the axial force transmitted by the fastening bolts is used to force the rotating cylinders 42 and 43, which are in clearance fit with the left and right through holes, to generate skewed misalignment interference within their tolerance limits. By changing the coaxiality of the rotating cylinders 42 and 43 with the connecting hole of the conductive clamp a and the through hole of the upper end connector b of the main circuit breaker, the play in the full degree of freedom of motion between the conductive clamp a and the upper end connector b of the main circuit breaker is eliminated.

[0038] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An outdoor control cabinet, comprising a housing (1), wherein the bottom of the housing (1) is provided with an inlet hole and an outlet hole, characterized in that, A lifting seat (2) is slidably installed on the inner wall of the housing (1). A lifting mechanism (3) for controlling the lifting seat (2) is installed inside the housing (1). A wire clamping assembly (4) is detachably installed on the lifting seat (2). The wire clamping assembly (4) includes a mounting frame (41). A left through hole and a right through hole are respectively opened on the left and right side walls of the mounting frame (41). The left through hole and the right through hole correspond one to one. A slider (421) is slidably installed in the right through hole with clearance fit between the two. An internal thread is provided in the slider (421). The left end of the slider (421) is rotatably mounted with a rotating cylinder (42). The left end face of the rotating cylinder (42) is inclined. A rotating cylinder (43) is provided in the left through hole with clearance fit. The right end face of the rotating cylinder (43) is inclined and complementary to the left end face of the rotating cylinder (42). An elastic element (44) for bringing the rotating cylinder (42) and the rotating cylinder (43) closer to each other is installed in the mounting frame (41). The wire clamping assembly (4) also includes a bolt adapted to the internal thread. The bolt is in clearance fit with the inner hole of the rotating cylinder (42) and the rotating cylinder (43).

2. The outdoor control cabinet according to claim 1, characterized in that, The inner hole of the first rotating cylinder (42) is not coaxial with the first rotating cylinder (42), so that the center of gravity of the first rotating cylinder (42) is lower, and the tip of the first rotating cylinder (42) is located at the top in the initial state. The second rotating cylinder (43) has the same structure as the first rotating cylinder (42).

3. The outdoor control cabinet according to claim 1, characterized in that, The lifting mechanism (3) includes a rope (32) and a fixed pulley (31). The fixed pulley (31) is installed in the upper left corner of the housing (1). One end of the rope (32) is connected to the lifting seat (2), and the other end is connected to the drive source.

4. The outdoor control cabinet according to claim 1, characterized in that, The left end of the rotating drum (43) is provided with a ring (431) that abuts against the conductive clamp (a). When the conductive clamp (a) is connected to the upper end connector (b) of the disconnecting switch, the bolt passes through the inner hole of the ring (431) and engages with the internal thread, and the bolt head abuts against the ring (431).

5. The outdoor control cabinet according to claim 4, characterized in that, The slider (421) is a nut, and a compression spring is installed in both the left and right through holes. The compression spring abuts against the nut or the ring (431), thereby bringing the first rotating cylinder (42) and the second rotating cylinder (43) closer to each other.

6. The outdoor control cabinet according to claim 5, characterized in that, Multiple limiting mechanisms (5) are installed on the inner wall of the box (1). When the mounting frame (41) passes the limiting mechanism (5), the limiting mechanism (5) restricts the cable from moving to the middle of the box (1).

7. The outdoor control cabinet according to claim 6, characterized in that, The limiting mechanism (5) includes a lever (52) with one end rotatably mounted to the inner wall of the box (1). The hinge of the lever (52) is connected to a railing (53) perpendicular to the lever (52). In the initial state, the railing (53) is vertical. When the mounting frame (41) rises against the lever (52), the railing (53) gradually becomes horizontal. A snap-fit ​​assembly is installed on the inner wall of the box (1). When the railing (53) is in a horizontal state, it snaps one end of the lever (52) to restrict the lever (52) from rotating downward.

8. The outdoor control cabinet according to claim 7, characterized in that, The snap-fit ​​assembly includes a telescopic snap pin (51) that is slidably installed on the inner side wall of the box (1). The bottom of the telescopic snap pin (51) is an inclined surface, and a limiting groove that connects with the inclined surface is provided in the middle. When the railing (53) rotates, the railing (53) abuts against the inclined surface to retract the telescopic snap pin (51), and finally one end of the railing (53) enters the limiting groove.

9. The outdoor control cabinet according to claim 7, characterized in that, A rotating sleeve is fitted onto the railing (53).

10. The outdoor control cabinet according to claim 9, characterized in that, The outer layer of the rotating sleeve is a flexible layer.

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