A high-voltage solid-state soft-start device with anti-electromagnetic shielding

Abstract

The application discloses an anti-electromagnetic shielding type high-voltage solid-state soft starting device, which comprises a cabinet body, a cabinet door, an inner shielding mechanism, a covering mechanism and a heat dissipation mechanism; the cabinet door is connected to one side of the outer wall of the cabinet body through a hinge; the inner shielding mechanism is fixedly connected to the upper part of the inner wall of one side of the cabinet body; the covering mechanism is movably covered on the outer side of the inner shielding mechanism; the heat dissipation mechanism is installed at the top end of the cabinet body; the inner shielding mechanism comprises an inner shielding bin which is fixedly connected to the upper part of the inner wall of one side of the cabinet body; a mounting groove which is arranged on the inner wall of one side of the inner shielding bin and is provided with a plurality of hinge holes penetrating through the inner walls of the mounting groove; a U-shaped frame which is hingedly connected to the hinge holes through hinge shafts at two ends of the U-shaped frame and is partially arranged in the mounting groove; and a gear two which is fixedly connected to the outer end of the hinge shaft. The anti-electromagnetic shielding type high-voltage solid-state soft starting device has the effect of realizing reliable electromagnetic sealing to prevent electromagnetic waves from leaking from the wire penetrating hole.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic shielding equipment technology, and in particular to an electromagnetic shielding type high-voltage solid-state soft starter. Background Technology

[0002] High-voltage solid-state soft starters, as core equipment for starting high-power motors, typically contain highly interfering electrical units such as thyristor assemblies and high-voltage input copper busbars. During the chopping and voltage regulation process, the thyristors generate a large amount of high-frequency electromagnetic harmonic interference. If this interference is not effectively shielded, it will seriously affect the stable operation of the device's own control unit and may even cause electromagnetic pollution to other precision equipment in the same power system. Therefore, existing technologies typically employ an independent metal shielding compartment inside the cabinet to physically isolate the high-interference source from the low-voltage control unit, thereby improving the device's electromagnetic compatibility performance.

[0003] However, the shielded enclosure is not a completely enclosed, independent space. External cables need to be run from the outside of the cabinet, through a cable tray (or wire passage hole) at the bottom of the enclosure, and into the interior to connect to high-voltage electrical units such as thyristors. The existence of this cable tray inevitably becomes a weak channel for electromagnetic leakage. Electromagnetic waves can radiate outward along the gap between the cable and the cable tray, significantly reducing the overall shielding effectiveness of the enclosure. Summary of the Invention

[0004] This invention discloses an electromagnetic shielding type high-voltage solid-state soft starter, which aims to solve the technical problem that electromagnetic waves can radiate outward along the gap between the cable and the wire hole, thus greatly reducing the overall shielding effectiveness of the shielding chamber.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An electromagnetically shielded high-voltage solid-state soft starter includes a cabinet and further includes: a cabinet door connected to one side of the cabinet's outer wall via hinges; an inner shielding mechanism fixedly connected to the upper part of one side of the cabinet's inner wall; a covering mechanism movably covering the outer side of the inner shielding mechanism; and a heat dissipation mechanism installed at the top of the cabinet. The inner shielding mechanism includes: an inner shielding chamber fixedly connected to the upper part of one side of the cabinet's inner wall; a mounting groove located on one side of the inner shielding chamber's inner wall, with hinge holes penetrating multiple sides of the mounting groove's inner wall; a U-shaped frame, with both ends hinged to the hinge holes via hinge shafts, and a portion of the U-shaped frame located within the mounting groove; a second gear fixedly connected to the outer end of the hinge shaft, with the second gear movably meshing with a first gear, and a motor being drivenly connected to one side of the outer wall of the first gear; multiple wire troughs equidistantly penetrating the bottom inner wall of the inner shielding chamber; multiple sealing plugs equidistantly fixedly connected to one side of the outer wall of the U-shaped frame, and inserted into the multiple wire troughs; and a lamp tube fixedly installed on one side of the inner wall of the U-shaped frame. A bearing seat is fixedly connected to one side of the outer wall of the inner shielding chamber, and a gear is rotatably connected to the bearing seat. A motor is fixedly connected to one side of the outer wall of the bearing seat. Side covers are fixedly connected to both sides of the outer walls of the inner shielding chamber, and the motor, bearing seat and gear are located inside the side covers. A light groove is provided on one side of the inner wall of the U-shaped frame, and the lamp tube is installed in the light groove.

[0006] The electric rotation of the U-shaped frame is achieved by a motor-driven gear set, completely replacing the traditional manual screw-tightening or cover-prying operation, greatly improving the efficiency and convenience of cable maintenance. The sealing plug is inserted into the cable tray as the U-shaped frame descends, forming a circumferential elastic compression on the cable sheath passing through the tray. This achieves reliable electromagnetic sealing to prevent electromagnetic waves from leaking from the cable hole, while also avoiding excessive compression that could damage the cable insulation layer. The meshing transmission of the gear set has a reverse self-locking characteristic, so even if the motor is powered off, the U-shaped frame can remain stably in the closed or open position, preventing accidental falls due to gravity that could injure operators. The U-shaped frame is always connected to the inner shielding compartment via a hinge shaft, unlike traditional independent covers that can be disassembled and misplaced or lost. At the same time, the lamp changes its illumination angle as the U-shaped frame rotates, automatically illuminating the cable tray area during cable threading and improving the dim operating visibility inside the cabinet.

[0007] In a preferred embodiment, the heat dissipation mechanism includes: multiple air inlets equidistantly disposed on the top inner wall of the inner shielding chamber; a multi-port pipe with multiple output ends fixedly connected to the top inner wall of the multiple air inlets, and an air cooler fixedly connected to the input end of the multi-port pipe, the air cooler being fixedly installed on the top outer wall of the cabinet. The heat dissipation mechanism further includes: multiple flexible tubes made of the same material as the flexible shielding sheet, which are respectively fixedly connected to the bottom inner wall of multiple air inlets, and each flexible tube has micropores penetrating through its bottom inner wall; and multiple multi-fold exhaust bends, which are respectively fixedly connected to the bottom inner wall of the inner shielding chamber.

[0008] With a heat dissipation mechanism, the flexible tube is made of flexible electromagnetic shielding material and is suspended from top to bottom inside the inner shielding chamber. After cold air is poured in, the tube expands to form a large-area low-temperature radiant wall. This wall directly faces the top of the chamber, the area where heat is most likely to accumulate. It exchanges heat with the hot air efficiently through radiation and convection. Compared with the traditional method of opening heat dissipation holes on the shielding chamber wall, this solution achieves active internal cooling without destroying the overall shielding continuity of the inner shielding chamber. The micropores are opened at the bottom of the flexible tube, and their diameter is much smaller than the wavelength of electromagnetic interference. Therefore, while cold air leaks out from the micropores, electromagnetic waves cannot leak out from the micropores, achieving a synergistic effect of air-permeable but wave-transparent shielding and heat dissipation.

[0009] In a preferred embodiment, the covering mechanism includes: a bearing frame, fixedly connected to the top outer wall of the inner shielding chamber; a shaft, rotatably connected inside the bearing frame, with one end of the shaft connected to a second motor; and a flexible shielding sheet, wrapped around the outer periphery of the shaft. The covering mechanism further includes: a load-bearing rod, fixedly connected to the bottom end of the flexible shielding sheet; and side grooves, symmetrically fixedly connected to the outer wall of the two side covers on the same side, with the two ends of the load-bearing rod respectively movably connected to the two side grooves. The covering mechanism further includes: a horizontal plate, which is fixedly connected to the outer wall of the side groove on the same side, and the outer wall of the flexible shielding sheet is movably attached to the inner wall of the horizontal plate; and a control button, which is fixedly installed on the outer side of one of the side grooves and electrically connected to the motor. The covering mechanism further includes: waist-shaped grooves, symmetrically arranged on the inner walls of opposite sides of the two side covers; side baffles, with sliding rods fixedly connected to both ends, and the sliding rods on both sides being movably connected to the two waist-shaped grooves; and slots, penetrating the inner wall of one side of the side baffles. The covering mechanism further includes: magnetic sheets, which are fixedly connected to one side of the outer wall of the side baffle and one side of the inner wall of the flexible shielding sheet, respectively, and the two magnetic sheets are magnetically attracted to each other; and a hinge, which connects the bottom end of the side baffle to one side of the outer wall of the U-shaped frame.

[0010] With a covering mechanism, the flexible shielding sheet adopts a roll-up structure. When fully rolled up, it is hidden at the top of the shaft, not occupying the operating passage in front of the cabinet, thus avoiding the space-consuming drawbacks of traditional rigid doors that flip outwards. Motor 2, in conjunction with the shaft, allows the flexible shielding sheet to remain at any height. Maintenance personnel can partially roll up the shielding sheet according to actual maintenance needs, exposing only the area requiring operation, while the unrolled portion remains electromagnetically shielded. This achieves the effect of simultaneous maintenance and shielding, something traditional rigid fully-opening door structures cannot do. The side panels are hinged at the bottom. The dual constraint of the U-shaped frame and the upper sliding rod sliding to the waist-shaped groove enables the movement to follow the flipping action of the U-shaped frame, forming structural compensation and limiting support for the bottom of the flexible shielding sheet, ensuring the long-term reliability of the seal; the slot is set through the inner wall of the side baffle, which greatly reduces the physical area of ​​the side baffle, and provides sufficient operating space for the operator's hand movements during the wire threading operation, avoiding the side baffle from obstructing the view or hindering the hand threading action, while also providing a through channel for the cable, preventing the cable from being squeezed and deformed, and achieving a synergistic balance between sealing function and operation convenience.

[0011] As described above, an anti-electromagnetic shielding high-voltage solid-state soft starter includes a cabinet and further includes: a cabinet door, connected to one side of the outer wall of the cabinet via a hinge; an inner shielding mechanism, fixedly connected to the upper part of one side of the inner wall of the cabinet; a covering mechanism, movably covering the outside of the inner shielding mechanism; and a heat dissipation mechanism, installed at the top of the cabinet. The inner shielding mechanism includes: an inner shielding chamber, fixedly connected to the upper part of one side of the inner wall of the cabinet; a mounting groove, located on one side of the inner wall of the inner shielding chamber, with hinge holes penetrating through multiple inner walls of the mounting groove; a U-shaped frame, with both ends hinged to the hinge holes via hinge shafts, and part of the U-shaped frame located within the mounting groove; a second gear, fixedly connected to the outer end of the hinge shaft, with the second gear movably meshing with a first gear, and a motor being drivenly connected to one side of the outer wall of the first gear; multiple wire grooves, equidistantly penetrating the bottom inner wall of the inner shielding chamber; multiple sealing plugs, equidistantly fixedly connected to one side of the outer wall of the U-shaped frame, and inserted into multiple wire grooves; and a lamp tube, fixedly installed on one side of the inner wall of the U-shaped frame. The electromagnetic shielding type high-voltage solid-state soft starter provided by the present invention has the technical effect of achieving reliable electromagnetic sealing to prevent electromagnetic waves from leaking from the wire hole. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of an electromagnetically shielded high-voltage solid-state soft-start device proposed in this invention.

[0013] Figure 2 This is a schematic diagram showing the internal shielding mechanism of an anti-electromagnetic shielding type high-voltage solid-state soft-start device proposed in this invention.

[0014] Figure 3 This is a schematic diagram showing the disassembled shielding component of an electromagnetically shielded high-voltage solid-state soft-start device proposed in this invention.

[0015] Figure 4 This is a schematic diagram showing the disassembled cover mechanism of an anti-electromagnetic shielding high-voltage solid-state soft-start device proposed in this invention.

[0016] Figure 5 This is a schematic diagram of the heat dissipation mechanism of an electromagnetically shielded high-voltage solid-state soft-start device proposed in this invention.

[0017] In the diagram: 1. Cabinet door; 2. Cabinet body; 3. Heat dissipation mechanism; 4. Internal shielding mechanism; 5. Covering mechanism; 301. Air inlet; 302. Air cooler; 303. Multi-port pipe; 304. Flexible pipe body; 305. Micro-perforation; 306. Multi-fold exhaust bend; 401. Internal shielding compartment; 402. Bearing housing; 403. Gear 1; 404. Motor; 405. Mounting slot; 406. Cable tray; 407. Gear 2; 408. U-shaped frame; 409. 410. Lamp tube; 411. Sealing plug; 412. Hinge shaft; 413. Hinge hole; 414. Side cover; 501. Waist-shaped groove; 502. Sliding rod; 503. Side baffle; 504. Groove opening; 505. Magnetic sheet; 506. Hinge; 507. Bearing bracket; 508. Horizontal plate; 509. Rotating shaft; 510. Flexible shielding sheet; 511. Motor II; 512. Load-bearing rod; 513. Side groove body; 514. Control button. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] The electromagnetic shielding-resistant high-voltage solid-state soft-start device disclosed in this invention is mainly used in electromagnetic shielding scenarios.

[0020] Reference Figure 1 and Figure 2 An electromagnetically shielded high-voltage solid-state soft starter is disclosed. The cabinet 2 is a hollow metal box structure. A cabinet door 1 is hinged to the front opening of the cabinet 2, and the door 1 can be opened or closed relative to the cabinet 2. An inner shielding mechanism 4 is fixedly connected to the upper part of the rear inner wall of the cabinet 2. A covering mechanism 5 is movably covered on the outside of the inner shielding mechanism 4. A heat dissipation mechanism 3 is installed at the top of the cabinet 2. The inner shielding mechanism 4 forms a closed shielding cavity. The thyristor assembly and high-voltage input copper busbar of the high-voltage solid-state soft starter are installed within this shielding cavity. The covering mechanism 5 forms an openable electromagnetic shielding layer at the outer opening of the inner shielding mechanism 4, and the heat dissipation mechanism 3 actively cools the interior of the shielding cavity.

[0021] Reference Figures 2 to 3 The inner shielding mechanism 4 includes an inner shielding chamber 401, a mounting groove 405, a U-shaped frame 408, a gear 1 403, a gear 2 407, a motor 1 404, a bearing seat 402, a side cover 414, a wire groove 406, a sealing soft plug 411, a lamp tube 410, and a lamp groove 409.

[0022] The inner shielding compartment 401 is a hollow metal box structure with an open front end and its rear end wall fixed to the upper part of the rear inner wall of the cabinet 2 by bolts. A mounting slot 405 is located on the front inner wall of the inner shielding compartment 401. Hinges 413 are respectively provided through the inner walls of the left and right sides of the mounting slot 405, and the two hinge holes 413 are coaxially arranged. The left and right ends of the U-shaped frame 408 are hinged to the two hinge holes 413 by hinge shafts 412. The U-shaped frame 408 can rotate up and down around the axis of the hinge shafts 412. The front part of the U-shaped frame 408 is located inside the mounting slot 405, and the rear part protrudes outside the mounting slot 405.

[0023] A bearing housing 402 is fixedly connected to the outer right side of the inner shielding chamber 401. A gear 403 is rotatably connected inside the bearing housing 402, with its rotation axis parallel to the axis of the hinge shaft 412. A motor 404 is fixedly connected to the outer right side of the bearing housing 402, and its output shaft is connected to the gear 403. The outer end of the right hinge shaft 412 extends to the right through a hinge hole 413, and a gear 407 is fixedly connected to this extended end. The gear 407 meshes with the gear 403.

[0024] When motor 404 is powered on, it drives gear 403 to rotate. Gear 403 drives gear 407 to rotate synchronously. Gear 407 drives hinge shaft 412 to rotate, which in turn drives U-shaped frame 408 to rotate up and down around the axis of hinge shaft 412. Side covers 414 are fixedly connected to the outer walls of the left and right sides of the inner shielding chamber 401 by bolts. The side covers 414 enclose motor 404, bearing seat 402, gear 403 and gear 407 in their internal space. The side covers 414 and the inner shielding chamber 401 together form a complete shielding shell.

[0025] Multiple cable trays 406 are equidistantly arranged along the left-right direction on the inner wall of the bottom end of the inner shielding chamber 401. Each cable tray 406 is a rectangular through-hole, allowing external cables to pass from outside the cabinet 2 into the inner shielding chamber 401. Multiple sealing plugs 411 are equidistantly fixed to the outer front wall of the U-shaped frame 408 along the left-right direction. The number of sealing plugs 411 corresponds one-to-one with the number of cable trays 406, and each sealing plug 411 is inserted into its corresponding cable tray 406. The sealing plugs 411 are made of elastic insulating material, and their outer contours are adapted to the inner contours of the cable trays 406.

[0026] When the U-shaped frame 408 flips upward, the sealing plug 411 is pulled out from the corresponding wire groove 406, fully exposing the wire groove 406 for wire threading. When the U-shaped frame 408 flips downward, the sealing plug 411 is inserted into the corresponding wire groove 406, squeezing and wrapping the cable sheath passing through the wire groove 406, forming a circumferential elastic compression seal to prevent electromagnetic waves from leaking from the wire groove 406. The bearing housing 402 ensures a constant meshing clearance between gear 1 403 and gear 2 407, making the transmission smooth and without jamming. The side cover 414 provides physical protection and electromagnetic shielding compensation for motor 1 404, bearing housing 402, and gear 1 403, eliminating the potential for electromagnetic leakage at the shaft protrusion.

[0027] A light trough 409 is provided on the inner front wall of the U-shaped frame 408. The light trough 409 is a rectangular recessed groove, and the light tube 410 is embedded in the light trough 409. The light tube 410 does not protrude from the surface of the U-shaped frame 408 to avoid interference with cables or internal components during the flipping process. The light tube 410 is electrically connected to an external power supply to provide illumination for the operator during the wiring operation. When the motor 404 engages with the gear set, the gear meshing reverse self-locking characteristic ensures that even if the motor 404 is de-energized, the U-shaped frame 408 can remain stably in the closed or open position. The U-shaped frame 408 is always connected to the inner shielding compartment 401 through the hinge shaft 412, preventing it from being disassembled and misplaced or lost like traditional independent covers. The light tube 410 changes its illumination angle as the U-shaped frame 408 flips, automatically illuminating the wire trough 406 area during wiring and improving the visibility of the operator inside the cabinet.

[0028] The electric rotation of the U-shaped frame 408 is achieved by the gear set driven by the motor 404, replacing the traditional manual screw tightening or prying of the cover plate, which greatly improves the efficiency and convenience of cable maintenance. The sealing soft plug 411 is inserted into the cable groove 406 as the U-shaped frame 408 moves down, forming a circumferential elastic compression on the cable sheath passing through the cable groove 406. This achieves a reliable electromagnetic seal to prevent electromagnetic waves from leaking from the cable hole, and avoids excessive compression that could damage the cable insulation layer. The meshing transmission of the gear set has a reverse self-locking characteristic. Even if the motor is powered off, the U-shaped frame 408 can remain stably in the closed or open position, and will not fall accidentally due to gravity and injure the operator.

[0029] Reference Figures 3 to 4 The covering mechanism 5 includes a bearing frame 507, a rotating shaft 509, a motor 511, a flexible shielding sheet 510, a load-bearing rod 512, a side groove 513, a horizontal plate 508, a control button 514, a waist-shaped groove 501, a side baffle 503, a sliding rod 502, a slot 504, a magnetic sheet 505, and a hinge 506.

[0030] The bearing bracket 507 is a metal support structure, fixedly connected to the top outer wall of the inner shielding chamber 401 by bolts. The rotating shaft 509 is a metal round shaft extending horizontally in the left-right direction, rotatably connected inside the bearing bracket 507. The right end of the rotating shaft 509 extends out of the bearing bracket 507 and is connected to the output shaft of the second motor 511. The second motor 511 is fixedly installed on the right outer wall of the bearing bracket 507. The flexible shielding sheet 510 is made of flexible electromagnetic shielding material, with its upper edge fixedly connected to the outer peripheral wall of the rotating shaft 509. The flexible shielding sheet 510 is wrapped around the outer periphery of the rotating shaft 509 and can be rolled up or unrolled as the rotating shaft 509 rotates. A load-bearing rod 512 is fixedly connected to the bottom end of the flexible shielding sheet 510. The load-bearing rod 512 is a long metal strip extending horizontally in the left-right direction, used to provide gravity traction.

[0031] Both side grooves 513 are vertically arranged U-shaped elongated grooves, symmetrically fixed to the front outer walls of the two side covers 414 by bolts, with the openings of the two side grooves 513 facing each other. The left and right ends of the load-bearing rod 512 extend into the two side grooves 513 respectively, and can slide up and down along the vertical direction of the side grooves 513. The side grooves 513 form a guiding constraint on the two ends of the load-bearing rod 512, ensuring that the flexible shielding sheet 510 will not swing or deviate from its original position during the lifting and lowering process.

[0032] The horizontal plate 508 is a metal flat plate that extends horizontally in the left-right direction. Its left and right ends are fixedly connected to the front outer walls of the two side slots 513, respectively. The horizontal plate 508 is located at the middle height of the side slots 513. When unfolded, the outer wall of the flexible shielding sheet 510 moves and fits against the inner wall of the horizontal plate 508. The horizontal plate 508 provides a close fit and support for the flexible shielding sheet 510, reducing the gap between the shielding sheet and the cabinet. A control button 514 is fixedly installed on the outer wall of one of the side slots 513. The control button 514 is electrically connected to the second motor 511. The operator can control the second motor 511 to rotate forward, reverse, or stop by pressing the control button 514.

[0033] When motor 511 drives the rotation of the shaft 509 in the first direction, the flexible shielding sheet 510 is released from the shaft 509. Under the gravity pull of the load bar 512, the flexible shielding sheet 510 unfolds vertically downward along the side grooves 513 on both sides, covering the opening area of ​​the inner shielding chamber 401. When motor 511 drives the rotation of the shaft 509 in the second direction, the flexible shielding sheet 510 is wound up from the shaft 509. The flexible shielding sheet 510 overcomes the gravity of the load bar 512 and is wound upward onto the shaft 509, exposing the opening of the inner shielding chamber 401 for maintenance operations.

[0034] Motor 2 511, in conjunction with the winding shaft 509, allows the flexible shielding sheet 510 to remain at any height. Maintenance personnel can partially retract the shielding sheet according to actual repair needs, exposing only the area requiring operation. The unretracted portion remains electromagnetically shielded, achieving the effect of simultaneous maintenance and shielding. The flexible shielding sheet 510 employs a retractable structure, and when fully retracted, it is hidden at the top of the winding shaft 509, without obstructing the front operating passage of the cabinet, avoiding the space-consuming drawbacks of traditional rigid doors that flip outwards.

[0035] Two oblong grooves 501 are symmetrically arranged on the inner walls of opposite sides of the two side covers 414. The oblong grooves 501 are elongated through-holes that extend obliquely in the front-back direction. The side baffles 503 are metal plates, with slide rods 502 fixedly connected to their left and right ends. The slide rods 502 are cylindrical rods, and the two slide rods 502 are movably inserted into the two oblong grooves 501. The slide rods 502 can slide back and forth along the trajectory of the oblong grooves 501.

[0036] The bottom end of the side baffle 503 is hinged to the front outer wall of the U-shaped frame 408 via a hinge 506, and the side baffle 503 can rotate relative to the U-shaped frame 408 around the axis of the hinge 506. A slot 504 is provided through the inner wall of one side of the side baffle 503. The slot 504 is a rectangular through hole that passes through the side baffle 503 in the left-right direction.

[0037] There is a height difference between the outer end of the U-shaped frame 408 and the outer wall of the inner shielding chamber 401, which is compensated for by the side baffle 503. When the U-shaped frame 408 is rotated around the hinge shaft 412 under the drive of the motor 404, the U-shaped frame 408 drives the side baffle 503 to move as a whole. The bottom end of the side baffle 503 changes its spatial position as the U-shaped frame 408 rotates through the hinge 506, and the upper end of the side baffle 503 slides along the trajectory of the waist-shaped groove 501 through the slide rod 502.

[0038] During the flipping process of the U-shaped frame 408 from the closed position to the open position, the side baffle 503, under the joint constraint of the hinge 506 and the waist-shaped groove 501, gradually tilts from the vertical state, and then transitions from the tilted state to the horizontal storage state above the U-shaped frame 408. When the U-shaped frame 408 flips from the open position to the closed position, the side baffle 503 moves in the opposite direction, returning from the horizontal storage state to the vertical state. Finally, the side baffle 503 stands upright on the outer side of the outer wall of the inner shielding chamber 401, and the outer wall of the side baffle 503 is basically flush with the outer wall of the inner shielding chamber 401, completing the structural compensation and limiting of the bottom of the flexible shielding sheet 510.

[0039] Two magnetic pieces 505 are fixedly connected to the front outer wall of the side baffle 503 and the rear inner wall of the flexible shielding sheet 510, respectively, with their positions corresponding to each other. When the flexible shielding sheet 510 is fully extended and the side baffle 503 is erected in a vertical position, the two magnetic pieces 505 are magnetically attracted to each other. After the flexible shielding sheet 510 is fully extended under the traction of the load-bearing rod 512, the magnetic pieces 505 on the flexible shielding sheet 510 and the magnetic pieces 505 on the side baffle 503 are attracted to each other and positioned. Then, the motor 511 reverses and rewinds by a small angle, and the flexible shielding sheet 510 is further stretched and tightened after being magnetically positioned, ensuring a tight and seamless fit between the flexible shielding sheet 510 and the side baffle 503.

[0040] The side baffle 503 is hinged to the U-shaped frame 408 via a bottom hinge 506 and slidably connected to the waist-shaped groove 501 via an upper slide rod 502, achieving a dual constraint that allows it to follow the flipping motion of the U-shaped frame 408. This provides structural compensation and limiting support for the bottom of the flexible shielding sheet 510, ensuring long-term reliability of the seal. The slot 504 is installed through the inner wall of the side baffle 503, significantly reducing the solid area of ​​the side baffle 503. This provides ample operating space for the operator's hands during wire threading, preventing the side baffle 503 from obstructing the view or hindering the wire threading action. At the same time, the slot 504 provides clearance for the cable passing through the wire groove 406, preventing interference between the cable and the side baffle 503, thus achieving a balance between sealing function and operational convenience.

[0041] Reference Figure 5 The heat dissipation mechanism 3 includes an air inlet 301, a multi-port pipe 303, a cooler 302, a flexible pipe body 304, and a multi-fold exhaust bend 306.

[0042] Multiple air inlets 301 are equidistantly arranged along the left-right direction on the inner wall of the top of the inner shielding chamber 401. Each air inlet 301 is a circular through-hole connecting the interior of the inner shielding chamber 401 to the external space. A multi-port pipe 303 is a metal pipe with multiple output ends fixedly connected to the inner wall of the top of each air inlet 301 via flanges. The input end of the multi-port pipe 303 is fixedly connected to the air outlet of the air cooler 302 via a pipe. The air cooler 302 is bolted to the outer wall of the top of the cabinet 2. The air cooler 302 is electrically connected to an external power supply and control module to generate low-temperature cold air.

[0043] Multiple flexible tubes 304 and flexible shielding sheets 510 are made of the same flexible electromagnetic shielding material. The upper opening of each flexible tube 304 is fixedly connected to the inner wall of the bottom end of the corresponding air inlet 301 through a pipe joint. The flexible tube 304 hangs down from the inner wall of the top of the inner shielding chamber 401 and extends into the interior of the shielding cavity. The bottom end of each flexible tube 304 is closed, and micro-holes 305 are provided through the bottom side wall or bottom wall. The micro-holes 305 are small circular holes with a diameter of no more than 2 mm. Multiple multi-fold exhaust bends 306 are fixedly connected to the inner wall of the bottom end of the inner shielding chamber 401. The multi-fold exhaust bends 306 are metal bends with internal channels that are bent more than twice. The lower opening of the multi-fold exhaust bends 306 connects to the outside of the cabinet 2.

[0044] After the air cooler 302 is started, it generates low-temperature cold air. The cold air is split through the multi-port pipe 303 and enters the corresponding flexible tube 304 through multiple air inlets 301. After the cold air enters the flexible tube 304, it expands the flexible tube 304 so that it hangs downwards and is fully extended. As the cold air flows inside the flexible tube 304, it cools the tube wall. The low-temperature tube wall exchanges heat with the hot air accumulated at the top of the inner shielding chamber 401 through thermal radiation and convection.

[0045] Cool air slowly leaks from the micro-holes 305 at the bottom of the flexible tube 304 into the internal space of the inner shielding chamber 401, mixes with the hot air inside the chamber, and sinks. The aperture of the micro-holes 305 is much smaller than the wavelength of electromagnetic interference, so electromagnetic waves cannot leak from the micro-holes 305. After heat exchange, the gas is finally discharged from the multi-bend exhaust pipe 306 at the bottom of the inner shielding chamber 401 to the outside of the cabinet 2, forming a complete cooling airflow circulation path.

[0046] The flexible tube 304, made of flexible electromagnetic shielding material, is suspended from top to bottom inside the inner shielding chamber 401. After cold air is introduced, it expands the tube to form a large-area low-temperature radiant wall. This wall directly faces the area at the top of the chamber where heat is most easily accumulated, achieving efficient heat exchange with the hot air through radiation and convection. Compared to the traditional method of opening heat dissipation holes in the shielding chamber wall, this solution achieves active internal cooling without disrupting the overall shielding continuity of the inner shielding chamber 401. Micro-holes 305 are located at the bottom of the flexible tube 304. Their diameter is much smaller than the wavelength of electromagnetic interference. While cold air escapes through the micro-holes, electromagnetic waves cannot leak from them, achieving a synergistic effect of breathable yet wave-proof shielding and heat dissipation.

[0047] Cool air slowly escapes through the micropores and continuously replenishes the internal space of the inner shielding chamber 401, forming a weak downward airflow that convects with the rising hot air inside the chamber, preventing high-temperature air from stagnating at the top for extended periods. The multi-bend exhaust pipe 306 is fixedly connected to the bottom inner wall of the inner shielding chamber 401. Its multi-bend structure ensures unobstructed exhaust while simultaneously attenuating internal electromagnetic waves, giving the exhaust channel electromagnetic shielding capabilities and further reinforcing the overall airtightness of the inner shielding chamber 401. The entire heat dissipation mechanism 3, without adding any extra openings or damaging the shielding structure, fully utilizes the dual mechanisms of radiative heat exchange through the flexible tube 304 and convective heat exchange through the micropores 305, achieving effective temperature reduction in the high-temperature areas inside the shielding chamber with minimal airflow disturbance.

[0048] Working principle: Under normal operating conditions, the U-shaped frame 408 is in the closed position, and the sealing soft plug 411 is inserted into the wire groove 406, forming an elastic compression seal on the wire hole; the flexible shielding sheet 510 is fully unfolded under the drive of the second motor 511, covering the outside of the opening of the inner shielding chamber 401, the side baffle 503 is in a vertical position and is attached to the flexible shielding sheet 510 by magnetic sheet 505, and the groove 504 provides space for the cable; the cooling fan 302 works continuously, and the cold air circulates and cools the inside of the shielding cavity through the flexible tube 304. When it is necessary to thread or replace the cable, the operator starts the first motor 404 through the control button 514 or the external controller. The first motor 404 drives the gear set to flip the U-shaped frame 408 upward, the sealing soft plug 411 is pulled out from the wire groove 406, the wire groove 406 is exposed, the lamp tube 410 is automatically lit, and the operator performs the threading operation.

[0049] After threading is complete, motor 404 reverses to flip U-shaped frame 408 downwards, and sealing plug 411 is reinserted into wire groove 406 to compress and seal. When internal components need maintenance, the operator controls motor 511 to rotate via control button 514, causing flexible shielding sheet 510 to roll upwards to the shaft 509, exposing the opening of inner shielding chamber 401 for maintenance. After maintenance, motor 511 reverses to unfold flexible shielding sheet 510 downwards under the traction of load bar 512. Once unfolded, magnetic sheet 505 is attracted and positioned, and motor 511 slightly rewinds to straighten the shielding sheet, completing the seal. Throughout all the above processes, heat dissipation mechanism 3 continues to operate, ensuring that the internal temperature of the shielding cavity remains within a safe range.

[0050] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-voltage solid-state soft starter with electromagnetic shielding, comprising a cabinet (2), characterized in that, Also includes: Cabinet door (1) is connected to the outer wall of one side of cabinet body (2) by hinges; The inner shielding mechanism (4) is fixedly connected to the upper part of the inner wall of one side of the cabinet (2); The covering mechanism (5) is movable and covers the outside of the inner shielding mechanism (4); The heat dissipation mechanism (3) is installed on the top of the cabinet (2); The inner shielding mechanism (4) includes: The inner shielding compartment (401) is fixedly connected to the upper part of the inner wall of one side of the cabinet (2); The mounting groove (405) is provided on one side of the inner wall of the inner shielding chamber (401), and the multiple inner walls of the mounting groove (405) are respectively provided with hinge holes (413). The U-shaped frame (408) has its two ends hinged to the hinge hole (413) by the hinge shaft (412), and part of the U-shaped frame (408) is located in the mounting groove (405); Gear 2 (407) is fixedly connected to the outer end of the hinge shaft (412), and gear 2 (407) is movably meshed with gear 1 (403). A motor (404) is connected to the outer wall of one side of gear 1 (403). Multiple cable trays (406) are equidistantly arranged through the bottom inner wall of the inner shielding chamber (401); Multiple sealing plugs (411) are fixedly connected at equal intervals to one side of the outer wall of the U-shaped frame (408) and are respectively inserted into multiple wire grooves (406); The lamp tube (410) is fixedly installed on the inner wall of one side of the U-shaped frame (408).

2. The electromagnetic shielding type high-voltage solid-state soft-start device according to claim 1, characterized in that, A bearing seat (402) is fixedly connected to one side of the outer wall of the inner shielding chamber (401), and a gear (403) is rotatably connected to the bearing seat (402). A motor (404) is fixedly connected to one side of the outer wall of the bearing seat (402). Side covers (414) are fixedly connected to the outer walls of both sides of the inner shielding chamber (401), and the motor (404), bearing seat (402) and gear (403) are located in the side cover (414). A lamp trough (409) is provided on one side of the inner wall of the U-shaped frame (408), and a lamp tube (410) is installed in the lamp trough (409).

3. The electromagnetic shielding type high-voltage solid-state soft-start device according to claim 1, characterized in that, The covering mechanism (5) includes: The bearing bracket (507) is fixedly connected to the top outer wall of the inner shielding chamber (401); It is rotatably connected to the bearing bracket (507) around the shaft (509), and one end of the shaft (509) is connected to the second motor (511). A flexible shielding sheet (510) is wrapped around the outer periphery of the shaft (509).

4. The electromagnetic shielding type high-voltage solid-state soft-start device according to claim 3, characterized in that, The covering mechanism (5) also includes: The load-bearing rod (512) is fixedly connected to the bottom end of the flexible shielding sheet (510); The side groove (513) is symmetrically fixed to the outer wall of the two side covers (414) on the same side, and the two ends of the load-bearing rod (512) are respectively movably connected to the two side grooves (513).

5. The electromagnetic shielding type high-voltage solid-state soft-start device according to claim 4, characterized in that, The covering mechanism (5) also includes: The horizontal plate (508) is fixedly connected to the outer wall of the side groove (513) on the same side, and the outer wall of the flexible shielding sheet (510) is movably attached to the inner wall of the horizontal plate (508). The control button (514) is fixedly installed on the outside of one of the side slots (513) and electrically connected to the second motor (511).

6. The electromagnetic shielding type high-voltage solid-state soft-start device according to claim 5, characterized in that, The covering mechanism (5) also includes: Waist-shaped grooves (501) are symmetrically arranged on the inner walls of the two opposite sides of the two side covers (414); The side baffle (503) has a sliding rod (502) fixedly connected to both ends, and the sliding rods (502) on both sides are movably connected to two waist-shaped grooves (501); The slot (504) is provided through the inner wall of one side of the side baffle (503).

7. The electromagnetic shielding type high-voltage solid-state soft-start device according to claim 6, characterized in that, The covering mechanism (5) also includes: The magnetic sheet (505) is fixedly connected to the outer wall of one side of the side baffle (503) and the inner wall of one side of the flexible shielding sheet (510), and the two magnetic sheets (505) are magnetically attracted to each other. The bottom end of the side panel (503) is hinged to one side of the outer wall of the U-shaped frame (508) via the hinge (506).

8. The electromagnetic shielding type high-voltage solid-state soft-start device according to claim 1, characterized in that, The heat dissipation mechanism (3) includes: Multiple air inlets (301) are equidistantly arranged on the top inner wall of the inner shielding chamber (401); The multi-port pipe (303) has multiple output ends that are fixedly connected to the inner wall of the top of multiple air inlets (301), and the input end of the multi-port pipe (303) is fixedly connected to a cooler (302), which is fixedly installed on the outer wall of the top of the cabinet (2).

9. The electromagnetic shielding type high-voltage solid-state soft-start device according to claim 8, characterized in that, The heat dissipation mechanism (3) also includes: Multiple flexible tubes (304) are made of the same material as the flexible shielding sheet (510) and are respectively fixedly connected to the bottom inner wall of multiple air inlets (301). Each flexible tube (304) has a micropore (305) through it. Multiple multi-bend exhaust pipes (306) are fixedly connected to the bottom inner wall of the inner shielding chamber (401).

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