Electromagnetic shielding device for complex electronic systems

Abstract

The application provides an electromagnetic shielding device of a complex electronic system, and belongs to the technical field of electromagnetic shielding of a radio telescope.The electromagnetic shielding device comprises a filter shielding cabinet, a waveguide and a connecting mechanism.The filter shielding cabinet is arranged on the top of a shielding cabin and located outside the shielding cabin; a servo system shielding cabinet is arranged in the shielding cabin; a wire outlet pipe is formed in the filter shielding cabinet, an installation opening is formed in the shielding cabin, and the wire outlet pipe penetrates into the shielding cabin through the installation opening. The waveguide is located in the shielding cabin, one end of the waveguide is connected with the filter shielding mechanism, and the other end of the waveguide is connected with the servo system shielding cabinet. The connecting mechanism is arranged at the wire outlet pipe and used for connecting the wire outlet pipe with the waveguide or connecting the waveguide with the servo system shielding cabinet. The filter shielding cabinet is arranged outside the shielding cabin, so that the space in the shielding cabin is not occupied, and the problem that the filter shielding cabinet is difficult to install due to the narrow space in the shielding cabin is solved.

Description

Technical Field

[0001] This invention belongs to the technical field of electromagnetic shielding for radio telescopes, and more specifically, relates to an electromagnetic shielding device for a complex electronic system. Background Technology

[0002] Radio telescopes, as highly sensitive instruments for detecting faint radio signals from the universe, are extremely sensitive to electromagnetic interference in their electronic systems. The intensity of cosmic radio signals is typically in the nanovolt range, while man-made electromagnetic noise in the surrounding environment (such as communication base stations and power equipment) can reach the millivolt range—a difference of millions of times. If the electronic system lacks effective shielding, electromagnetic interference will overwhelm the valid signal, leading to distorted or even invalid observation data. Currently, mainstream electromagnetic shielding technologies include conductive coatings, metal shielding chambers, and multi-layered composite shielding structures. Among these, grounded metal shielding chambers are the most widely used, using the Faraday cage principle to guide interference current to the ground, with typical shielding effectiveness exceeding 60 dB. Furthermore, in high-frequency scenarios, hybrid solutions combining absorbing materials and metal shielding are often employed, such as lining the inner walls of the shielding chamber with ferrite tiles to suppress resonance effects.

[0003] Existing electromagnetic shielding technologies suffer from the following drawbacks: In grounded shielding methods, to achieve a shielding effectiveness of over 80dB across a wide frequency band of 30MHz-18GHz, the metal shielding chamber walls must be at least 3mm thick and maintain structural continuity, resulting in single-sided dimensions typically exceeding 50cm. However, to reduce signal transmission loss, radio telescope electronic systems require sensitive modules such as preamplifiers and mixers to be installed near the feed horn. This area, limited by the antenna's mechanical structure, typically only allows for a shielding space of 20cm × 20cm × 15cm. This contradiction forces engineers to adopt compromise solutions, such as reducing the chamber wall thickness to less than 1mm, but this reduces low-frequency shielding effectiveness by 40%; or using a discontinuous splicing structure, which introduces electromagnetic leakage at the joints. Summary of the Invention

[0004] The purpose of this invention is to provide an electromagnetic shielding device for complex electronic systems, aiming to solve the problems of limited space and large size of electromagnetic shielding devices.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: to provide an electromagnetic shielding device for a complex electronic system, comprising:

[0006] The shielded enclosure contains a servo system shielded cabinet and a flexible waveguide; the waveguide is connected to the servo system shielded cabinet; and

[0007] The filter shielding cabinet is located on top of the shielding chamber and connected to the waveguide.

[0008] In one possible implementation, the filter shielding cabinet includes:

[0009] The incoming line shielding room is equipped with an incoming line conduit;

[0010] A filter shielding chamber for installing a filter; the incoming line shielding chamber is located on the incoming line side of the filter shielding chamber; the filter shielding chamber has cable passage holes at both ends; and

[0011] The outgoing wire shielding chamber is located on the outgoing wire side of the filter shielding chamber.

[0012] In one possible implementation, the filter shielding cabinet is provided with an outlet pipe, which is disposed on the side wall of the outlet shielding chamber;

[0013] The electromagnetic shielding device for the complex electronic system further includes a connecting component, which connects the outgoing pipe to the waveguide, or connects the waveguide to the servo system shielding cabinet; the shielding chamber has an installation port, through which the outgoing pipe enters the interior of the shielding chamber; the connecting component is located at the outgoing pipe.

[0014] In one possible implementation, the inlet pipe is provided with a first aviation connector, and the outlet pipe is provided with a second aviation connector; the filter's inlet line enters the inlet shielding chamber through the first aviation connector; the filter's outlet line connects to the second aviation connector.

[0015] In one possible implementation, a first metal wire mesh liner is fitted onto the outlet pipe, and the first metal wire mesh liner is fixed to the inner wall of the outlet shielding chamber.

[0016] In one possible implementation, a nut is threaded onto the outlet pipe; the nut is located inside the shielding chamber, and a gasket is provided between the nut and the inner wall of the shielding chamber.

[0017] In one possible implementation, a second metal wire mesh liner is provided between the gasket and the inner wall of the shielding chamber.

[0018] In one possible implementation, the connection component includes:

[0019] The connecting mechanism includes a first flange and a fixing member, wherein the first flange is fixedly connected to the outgoing conduit or the servo system shielded cabinet, and the fixing member is fixedly connected to the first flange; and

[0020] The quick-release mechanism includes a second flange, a handle, and a pull ring; the second flange is fixedly connected to the end of the waveguide, the handle is hinged to the second flange, and the pull ring is hinged to the handle.

[0021] In one possible implementation, the connection component includes:

[0022] The connecting mechanism includes a first flange, a fixed pipe, a sliding pipe, and a locking element. The first flange is fixedly connected to the outgoing pipe or the servo system shielding cabinet. The fixed pipe is fixedly connected to the first flange. The sliding pipe is slidably connected to the inner wall of the fixed pipe. The locking element is a spring disposed between the sliding pipe and the first flange and is rotatably connected to the first flange. The locking element, the fixed pipe, and the sliding pipe are coaxially arranged. The diameter of the locking element is smaller than the inner diameter of the sliding pipe. A slider is provided on the inner wall of the sliding pipe. Multiple sets of driving grooves and reset grooves are formed on the curved sidewall of the locking element. Multiple locking rods are provided on the top of the locking element. The driving grooves and reset grooves are spaced apart. The top of the driving groove communicates with the top of an adjacent reset groove, and the bottom communicates with the bottom of another adjacent reset groove. The slider is disposed in the driving groove or the reset groove.

[0023] A quick-release mechanism is fixedly connected to the end of the waveguide; the quick-release mechanism includes a second flange fixedly connected to the end of the waveguide and a connector fixedly connected to the second flange; the connector is located outside the waveguide, and a sliding groove is provided at the end of the connector. Multiple locking blocks are provided on the inner wall of the sliding groove, and a gap is formed between adjacent locking blocks to accommodate the locking rod.

[0024] In one possible implementation, the connecting mechanism includes a shielding groove, a third metal wire mesh gasket, and a comb-shaped spring. The shielding groove is fixedly connected to the first flange, the third metal wire mesh gasket is fixedly connected to the bottom of the shielding groove, and the comb-shaped spring is fixedly connected to the inner wall of the shielding groove; the shielding groove is annular.

[0025] The quick-release mechanism includes a shielding switch and a fourth metal wire mesh gasket. The shielding switch is fixedly connected to the second flange, and the fourth metal wire mesh gasket is disposed between the shielding switch and the second flange. After the shielding switch is inserted into the shielding groove, the shielding switch abuts against and squeezes the comb-shaped spring.

[0026] The beneficial effects of the electromagnetic shielding device for complex electronic systems provided by this invention are as follows: Compared with the prior art, the electromagnetic shielding device for complex electronic systems of this invention places the filter shielding cabinet outside the shielding chamber, without occupying the space inside the shielding chamber, thus solving the problem of limited space and difficulty in installing the filter shielding cabinet in the shielding chamber. At the same time, by using a flexible waveguide to connect the filter shielding mechanism and the servo system shielding cabinet, operators can adjust the position of the filter shielding cabinet according to the spatial location of the electronic system, making the installation position of the filter shielding cabinet more flexible. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A schematic diagram of the structure of an electromagnetic shielding device for a complex electronic system provided in the first embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of the filter shielding cabinet provided in an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of a connecting mechanism provided in an embodiment of the present invention;

[0031] Figure 4 A schematic diagram of the structure of an electromagnetic shielding device for a complex electronic system provided in the second embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the connection mechanism provided in the second embodiment of the present invention;

[0033] Figure 6 This is a schematic diagram of the connector and locking block in the second embodiment of the present invention.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Filter shielded cabinet; 11. Incoming cable shielded room; 111. Incoming cable conduit; 112. First aviation connector; 12. Filter shielded room; 13. Outgoing cable shielded room; 14. Outgoing cable conduit; 141. Second aviation connector; 15. Cable guide hole; 16. First metal wire mesh gasket; 17. Nut; 18. Washer; 19. Second metal wire mesh gasket; 2. Shielded compartment; 3. Servo system shielded cabinet; 4. Waveguide; 5. Connecting mechanism; 51. First flange; 52. 53. Shielding groove; 54. Third metal wire mesh pad; 55. Comb-shaped spring; 56. Locking component; 561. Locking rod; 562. Drive groove; 563. Reset groove; 57. Fixed tube; 58. Sliding tube; 581. Slider; 59. Spring; 6. Quick release mechanism; 61. Second flange; 62. Handle; 63. Pull ring; 64. Shielding switch; 65. Fourth metal wire mesh pad; 66. Connecting component; 661. Slide groove; 662. Locking block. Detailed Implementation

[0036] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0037] In the electromagnetic shielding system of a radio telescope, the filter shielding cabinet needs to be installed inside the shielded cabin and connected to the servo system shielding cabinet to effectively block electromagnetic interference and ensure the purity and accuracy of the signals received by the radio telescope. However, the current prominent problem is that there are numerous electronic system cabinets inside the shielded cabin, and the internal space is extremely limited, resulting in a severe shortage of installation space for the filter shielding cabinet.

[0038] From a system design perspective, the connection between the filter shielding cabinet and the servo system shielding cabinet is a crucial link in ensuring the integrity of electromagnetic shielding. Working together, they effectively filter and shield external electromagnetic interference, creating a stable electromagnetic environment for the radio telescope. However, the unreasonable space planning of the shielding chamber makes it difficult to find suitable installation locations for the filter shielding cabinet. This shortage of space resources not only increases the difficulty of construction and installation but may also affect the connection quality between the filter shielding cabinet and the servo system shielding cabinet due to forced installation or compromised layout, thereby weakening the effectiveness of the entire electromagnetic shielding system.

[0039] Furthermore, insufficient space may prevent the filter shielding cabinet from being deployed according to optimal installation specifications, affecting its heat dissipation performance and ease of maintenance. Filters generate heat during operation; if heat dissipation space is limited, the equipment temperature may become too high, accelerating equipment aging, reducing lifespan, and even causing malfunctions. Simultaneously, the confined space also makes subsequent inspection and maintenance difficult, increasing operation and maintenance costs and time. To address the problem of insufficient space in shielding chambers for installing filter shielding cabinets, embodiments of this invention provide an electromagnetic shielding device for complex electronic systems.

[0040] Reference Figures 1 to 6 The electromagnetic shielding device for complex electronic systems provided by the present invention will now be described.

[0041] An electromagnetic shielding device for a complex electronic system includes a shielding chamber 2 and a filter shielding cabinet 1. The shielding chamber 2 houses a servo system shielding cabinet 3 and a flexible waveguide 4; the waveguide 4 is connected to the servo system shielding cabinet 3. The filter shielding cabinet 1 is located on top of the shielding chamber 2 and is connected to the waveguide 4.

[0042] As a tubular structure guiding electromagnetic wave transmission, the choice of material for waveguide 4 is crucial. Copper, due to its high conductivity and good machinability, is often used in precision equipment with high signal quality requirements; however, it is expensive and prone to oxidation, requiring surface treatment. Aluminum, with its low cost and low density, is suitable for large-scale applications, and its slightly lower conductivity is usually compensated for by methods such as silver plating. Stainless steel has strong mechanical strength and corrosion resistance, making it suitable for harsh environments, but its poor conductivity means it is mostly used in scenarios where mechanical performance is paramount. In addition, alloys such as brass and bronze are often used in the interface parts of waveguide 4, combining conductivity and wear resistance. Non-metallic dielectric waveguides, using high dielectric constant insulating materials as the substrate, are suitable for millimeter-wave and optical wave transmission, but their high transmission loss limits their applications.

[0043] The expansion and contraction characteristics of waveguide 4 enable it to adapt to complex application scenarios. The expansion characteristic is achieved through a sliding sleeve structure or a bellows structure. The former utilizes the sliding of inner and outer sleeves to adjust the length, combined with a precision conductive contact design to ensure signal continuity; the latter achieves expansion and contraction through the elastic deformation of the corrugated tube wall, and is often used in scenarios requiring dynamic length adjustment. The contraction characteristic relies on the flexible waveguide 4 or a segmented hinged structure. The flexible waveguide 4 combines a thin metal tube wall with a flexible support structure, allowing bending within a certain curvature; the segmented hinged structure achieves flexible steering through rigid sections and hinge joints. However, the expansion and contraction of waveguide 4 present performance challenges, such as decreased conductivity at the contact surface leading to increased losses, and frequent movement causing material fatigue. These challenges require optimization through precision machining and the use of high-strength alloys.

[0044] This electromagnetic shielding device for complex electronic systems places the filter shielding cabinet 1 outside the shielding chamber 2, solving the problem of limited internal space in the shielding chamber 2 making it difficult to install the filter shielding cabinet 1. In traditional solutions, numerous electronic system cabinets occupy a large amount of space in the shielding chamber 2, and the filter shielding cabinet 1 may not be able to be deployed due to insufficient installation space, or the connection quality with the servo system shielding cabinet 3 may be affected. This solution places the filter shielding cabinet 1 externally, without occupying internal space in the shielding chamber 2, and ensures normal connection between the filter shielding cabinet 1 and the servo system shielding cabinet 3 through the waveguide 4. This not only ensures the integrity of the electromagnetic shielding system but also avoids installation difficulties and performance degradation caused by insufficient space.

[0045] The expandable and bendable characteristics of the waveguide 4 provide flexible installation positions for the filter shielding cabinet 1. The waveguide 4 achieves expansion and contraction through structures such as sliding sleeves and corrugated pipes, and achieves bending through flexible walls or segmented hinges, adapting to complex spatial layouts. When the filter shielding cabinet 1 is installed outside the shielding chamber 2, the waveguide 4 can flexibly adjust its length and direction according to the relative positions of the two and the wiring requirements inside the shielding chamber 2, bypassing obstacles such as other electronic system cabinets within the chamber, and precisely connecting the output pipe 14 of the filter shielding cabinet 1 to the connection port of the servo system shielding cabinet 3. This flexibility not only reduces installation difficulty but also reduces signal loss and mechanical stress caused by hard connections or fixed-path wiring, ensuring efficient electromagnetic signal transmission. It also facilitates later equipment maintenance and upgrades, enabling the entire electromagnetic shielding device to operate stably and reliably even in complex environments.

[0046] In one possible implementation, the filter shielding cabinet 1 includes: an incoming line shielding chamber 11, a filter shielding chamber 12, and an outgoing line shielding chamber 13.

[0047] An inlet pipe 111 is provided on the inlet shielding chamber 11; a filter shielding chamber 12 is used to install a filter; the inlet shielding chamber 11 is located on the inlet side of the filter shielding chamber 12; the filter shielding chamber 12 has cable passage holes 15 at both ends. The outlet shielding chamber 13 is located on the outlet side of the filter shielding chamber 12.

[0048] By dividing the interior of the filter shielding cabinet 1 into independent incoming line shielding chamber 11, filter shielding chamber 12, and outgoing line shielding chamber 13, a segmented shielding structure is formed. This allows for the isolation of the filter's input, processing, and output lines, reducing the mutual influence of electromagnetic interference between different areas. The incoming line conduit 111 and the outgoing line conduit 14 are respectively located in different shielding chambers, enabling centralized management of the input and output lines and avoiding shielding gaps caused by messy lines. The cable passage holes 15 facilitate the installation and connection of filter lines, ensuring the orderly transmission of signals. At the same time, the independent setting of each shielding chamber helps to improve the overall shielding effectiveness, enabling the filter to work stably in its independent space and enhancing the electromagnetic interference suppression capability of the entire electromagnetic shielding device against complex electronic systems.

[0049] Optionally, the filter shielding cabinet 1 can be made of steel plate, stainless steel, or aluminum alloy. Steel plate cabinets offer good shielding performance, effectively blocking external electromagnetic interference. They are relatively inexpensive, suitable for mass production, and widely used in industrial control, communication, and other fields with high electromagnetic shielding requirements. However, steel plate cabinets are heavy, making them inconvenient to handle and install, and they are prone to rust, requiring rust prevention treatments such as spraying anti-rust paint or galvanizing.

[0050] In one specific embodiment of the filter shielding cabinet 1, the filter shielding cabinet 1 has multiple partitions inside, with cable routing holes 15 on the partitions. The partitions divide the space inside the filter shielding cabinet into multiple independent spaces. These multiple spaces include at least a filter shielding chamber 12 located in the middle, and an inlet shielding chamber 11 and an outlet shielding chamber 13 located on opposite sides of the filter shielding chamber 12. The inlet shielding chamber 11 is equipped with an inlet pipe 111, and the outlet shielding chamber 13 is equipped with an outlet pipe 14.

[0051] In one possible implementation, the filter shielding cabinet 1 is provided with an outlet pipe 14, which is located on the side wall of the outlet shielding chamber 13. The electromagnetic shielding device for complex electronic systems also includes a connecting component that connects the outlet pipe 14 to the waveguide 4, or connects the waveguide 4 to the servo system shielding cabinet 3; the shielding chamber 2 has an installation port through which the outlet pipe 14 passes into the interior of the shielding chamber 2; the connecting component is located at the outlet pipe 14.

[0052] Through the adaptable structure of the connecting components, reliable electrical connections and mechanical fixation are achieved between the outgoing conduit 14, the waveguide 4, and the servo system shielding cabinet 3, ensuring the stability of signal transmission and the integrity of the shielding structure. The flexible waveguide 4, combined with the flexible assembly characteristics of the connecting mechanism 5, allows the connection path between the external filter shielding cabinet 1 and the internal servo system shielding cabinet 3 to be dynamically adjusted according to the spatial layout, breaking through the positional limitations of traditional hard connections and improving the flexibility and environmental adaptability of system installation. The connecting components are located at the outgoing conduit 14, concentrating the signal transmission interface near the installation port of the shielding cabin 2, reducing the number of openings in the shielding cabin 2, effectively reducing the risk of electromagnetic leakage, further enhancing the overall shielding effectiveness, and ensuring the stable operation of complex electronic systems in environments with strong electromagnetic interference.

[0053] In one possible implementation, the inlet pipe 111 is provided with a first aviation connector 112, and the outlet pipe 14 is provided with a second aviation connector 141; the filter's inlet line enters the inlet shielding chamber 11 through the first aviation connector 112; the filter's outlet line connects to the second aviation connector 141.

[0054] The filter is installed in the filter shielding chamber 12. The filter's input line is connected to the inside of the first aviation connector 112, and the external signal input line is connected to the outside of the first aviation connector 112. The filter's output line is connected to the inside of the second aviation connector 141, and the signal output line is connected to the outside of the second aviation connector 141. External electrical signals enter the filter through the external signal input line, the first aviation connector 112, and the filter input line. After processing, the filter outputs the signals through the filter output line, the second aviation connector 141, and the signal output line. The plug-in connection of the aviation connector facilitates the installation, maintenance, and replacement of the filter, improving the convenience of system operation. Furthermore, the compact connector layout reduces the exposed length of the wiring, lowering the risk of electromagnetic leakage due to exposed wiring, and further enhancing the anti-interference capability of the entire electromagnetic shielding device.

[0055] In one possible implementation, a first wire mesh pad 16 is fitted onto the outgoing conduit 14 and is fixed to the inner wall of the outgoing shielding chamber 13. The first wire mesh pad 16 isolates the outgoing shielding chamber 13 from the shielding compartment 2 and seals the gap between the outgoing conduit 14 and the mounting port, preventing external interference signals from entering the shielding compartment 2 through the gap between the outgoing shielding chamber 13 and the shielding compartment 2 and the gap between the outgoing conduit 14 and the mounting port.

[0056] In one possible implementation, a nut 17 is connected to the outside of the outlet pipe 14; the nut 17 is located inside the shielding chamber 2, and a washer 18 is provided at the end of the nut 17, which also abuts against the shielding chamber 2.

[0057] The cable outlet pipe 14 is securely fixed to the mounting port of the shielding chamber 2 via the threaded connection of nut 17 and cable outlet pipe 14, ensuring a stable connection. A gasket 18 is placed between nut 17 and the inner wall of the shielding chamber 2, increasing the contact area and dispersing the pressure of nut 17 on the inner wall of the shielding chamber 2, preventing damage to the shielding chamber 2 due to excessive localized stress. Simultaneously, this structure, combined with the first metal wire mesh liner 16, further enhances the sealing between the cable outlet pipe 14 and the shielding chamber 2, effectively sealing gaps, reducing electromagnetic leakage, improving the overall shielding effectiveness of the shielding device, and facilitating installation and disassembly for later maintenance and debugging.

[0058] In one possible implementation, a second wire mesh liner 19 is provided between the gasket 18 and the inner wall of the shielding chamber 2.

[0059] When installing the filter shielding cabinet 1, the connecting pipe is inserted into the installation port from the outside of the shielding compartment 2. Then, a second wire mesh pad 19 and a washer 18 are fitted onto the connecting pipe. Finally, the nut 17 is installed and tightened, clamping the second wire mesh pad 19 and the washer 18 so that the second wire mesh pad 19 abuts against the inner wall of the shielding compartment 2, sealing the gap between the outlet pipe 14 and the installation port. The shielding effectiveness of the filter shielding cabinet 1 is improved through the two layers of shielding: the first wire mesh pad 16 and the second wire mesh pad 19.

[0060] In one possible implementation, the connection assembly includes a connection mechanism 5 and a quick-release mechanism 6. The connection mechanism 5 includes a first flange 51 and a fastener 52. The first flange 51 is fixedly connected to the outlet pipe 14 or the servo system shielded cabinet 3, and the fastener 52 is fixedly connected to the first flange 51. The quick-release mechanism 6 includes a second flange 61, a handle 62, and a pull ring 63. The second flange 61 is fixedly connected to the end of the waveguide 4, the handle 62 is hinged to the second flange 61, and the pull ring 63 is hinged to the handle 62.

[0061] When assembling the connecting components, after the connecting mechanism 5 and the quick-release mechanism 6 are installed, the pull ring 63 is placed on the fixing member 52, at which point the handle 62 forms a certain angle with the first flange 51 and the second flange 61. Then, the handle 62 is rotated in the direction closest to the waveguide 4 until the handle 62 is parallel to the first flange 51 and the second flange 61. During this process, the handle 62 gradually pulls the pull ring 63 in until the pull ring 63 is perpendicular to the first flange 51 and the second flange 61. At this point, the pull ring 63 is at its tightest, and the assembly of the connecting mechanism is complete. To disassemble the connecting mechanism, simply rotate the handle 62 in the opposite direction to loosen the pull ring 63 and remove it from the fixing member 52.

[0062] In one possible implementation, the connecting components include a connecting mechanism 5 and a quick-release mechanism 6.

[0063] The connecting mechanism 5 includes a first flange 51, a fixed tube 57, a sliding tube 58, and a locking element 56. The first flange 51 is fixedly connected to the outgoing cable 14 or the servo system shielded cabinet 3. The fixed tube 57 is fixedly connected to the first flange 51. The sliding tube 58 is slidably connected to the inner wall of the fixed tube 57. The locking element 56 is a spring 59 disposed between the sliding tube 58 and the first flange 51, and is rotatably connected to the first flange 51. The locking element 56, the fixed tube 57, and the sliding tube 58 are coaxially arranged, and the diameter of the locking element 56 is smaller than the inner diameter of the sliding tube 58. A slider 581 is provided on the inner wall of the sliding tube 58, and multiple sets of drive grooves 562 and reset grooves 563 are provided on the curved sidewall of the locking element 56. Multiple locking rods 561 are provided on the top of the locking element 56. The drive slot 562 and the reset slot 563 are distributed at intervals. The top end of the drive slot 562 is connected to the top end of an adjacent reset slot 563, and the bottom end is connected to the bottom end of another adjacent reset slot 563. The slider 581 is disposed in the drive slot 562 or the reset slot 563.

[0064] The quick-release mechanism 6 is fixedly connected to the end of the waveguide 4; the quick-release mechanism 6 includes a second flange 61 fixedly connected to the end of the waveguide 4 and a connector 66 fixedly connected to the second flange 61; the connector 66 is located outside the waveguide 4, and a groove 661 is provided at the end of the connector 66. Multiple locking blocks 662 are provided on the inner wall of the groove 661, and a gap is formed between adjacent locking blocks 662 to accommodate the locking rod 561.

[0065] Optionally, a guide block is provided on the outer wall of the sliding tube 58, and an axial guide groove is provided on the inner wall of the fixed tube 57. The guide block is installed in the guide groove. Under the action of the guide block and the guide groove, the sliding tube 58 can only slide along the axial direction of the fixed tube 57 inside the fixed tube 57 and cannot rotate around its own axis. Under the action of the spring 59, the sliding tube 58 is located in the middle position of the fixed tube 57. When the sliding tube 58 slides into the fixed tube 57, the spring 59 is compressed and stores force.

[0066] In this embodiment, the bottom is described in the direction closest to the first flange 51, and the top is in the direction away from the first flange 51. The bottom of the drive groove 562 communicates with the bottom of an adjacent reset groove 563, and the top of the drive groove 562 communicates with the top of another adjacent reset groove 563. The drive groove 562 is a spiral shape along the curved surface of the locking member 56. The bottom of the reset groove 563 is a straight groove arranged along the axial direction of the locking member 56, and the top is a transition groove that communicates with the top of the adjacent drive groove 562. The slider 581 is disposed in the reset groove 563 or the drive groove 562. When the sliding tube 58 is at the top, the slider 581 is at the top of the drive groove 562.

[0067] When the sliding tube 58 begins to descend under pressure, the slider 581 slides in the drive groove 562, driving the locking member 56 to rotate. When the sliding tube 58 is at its lowest position, the slider 581 slides to the bottom of the drive groove 562 and enters the bottom of the reset groove 563, at which point the spring 59 is compressed to its shortest length. When the pressure on the sliding tube 58 disappears, the spring 59 gradually drives the sliding tube 58 to reset. At this time, the lifting tube drives the slider 581 to slide along the reset groove 563. When the sliding tube 58 returns to its highest position, the slider 581 slides to the top of the reset groove 563 and enters the top of the drive groove 562.

[0068] Multiple locking rods 561 are connected to the top of the locking member 56. The quick-release assembly 6 includes a connector 66 fixedly connected to the second flange 61. The connector 66 is located outside the waveguide 4, and its end has a cylindrical groove 661. Multiple locking blocks 662 are provided at the opening of the groove 661. A certain gap is provided between adjacent locking blocks 662. This gap is used for the locking rods 561 to pass through. The diameter of the connector 66 is the same as the outer diameter of the riser pipe.

[0069] During the installation of the connecting assembly, the locking rod 561 is aligned with the gap between the locking blocks 662, and then the shielding gate 64 is inserted into the shielding groove 53. Simultaneously, the connector 66 pushes the sliding tube 58 to slide. The locking rod 561 enters the sliding groove 661 from the gap between the locking blocks 662. As the connector 66 and the sliding tube 58 slide, the locking rod 561 gradually rotates, eventually misaligning with the gap between the locking blocks 662. When the external force disappears, the spring 59 drives the sliding tube 58 to reset. At this time, the locking block 662 blocks the locking rod 561, preventing the connector 66 from disengaging from the locking member 56, thus locking the connecting assembly. When it is necessary to disassemble the connecting assembly, the connector 66 and the sliding tube 58 are pushed to slide again, driving the locking rod 561 to rotate, so that the locking rod 561 is once again positioned in the gap between the adjacent locking blocks 662, allowing the connector 66 to unlock from the locking member 56.

[0070] In one possible implementation, the connecting mechanism 5 includes a shielding groove 53, a third wire mesh gasket 54, and a comb-shaped spring 55. The shielding groove 53 is fixedly connected to the first flange 51, the third wire mesh gasket 54 is fixedly connected to the bottom of the shielding groove 53, and the comb-shaped spring 55 is fixedly connected to the inner wall of the shielding groove 53. The shielding groove 53 is annular.

[0071] The quick-release mechanism 6 includes a shielding switch 64 and a fourth metal wire mesh gasket 65. The shielding switch 64 is fixedly connected to the second flange 61, and the fourth metal wire mesh gasket 65 is disposed between the shielding switch 64 and the second flange 61. After the shielding switch 64 is inserted into the shielding groove 53, the shielding switch 64 abuts against and squeezes the comb spring 55.

[0072] The comb-shaped spring 55 is annular, with its middle portion protruding towards the center of the shielding groove 53. Two comb-shaped springs 55 are provided and are respectively installed on opposite side walls of the shielding groove 53. When installing the connecting mechanism, the shielding switch 64 is inserted into the shielding groove 53 and engaged between the two comb-shaped springs 55.

[0073] The beneficial effects of the electromagnetic shielding device for complex electronic systems provided by this invention are as follows: Compared with the prior art, the electromagnetic shielding device for complex electronic systems of this invention places the filter shielding cabinet 1 outside the shielding chamber 2, without occupying the internal space of the shielding chamber 2, thus solving the problem of limited space in the shielding chamber 2 and the difficulty in installing the filter shielding cabinet 1. Simultaneously, a cable outlet pipe 14 is opened on the filter shielding cabinet 1 to concentrate the filter's wires into the cable outlet pipe 14. Therefore, only one circular hole needs to be opened on the side wall of the shielding chamber 2, reducing the number of openings in the shielding chamber 2, which is beneficial to improving the shielding effectiveness of the shielding chamber 2 and simplifying the shielding structure. Furthermore, the waveguide 4 and connecting components are used to connect the filter shielding mechanism and the servo system shielding cabinet 3. Operators can adjust the position of the filter shielding cabinet 1 according to the spatial location of the electronic system, making the installation position of the filter shielding cabinet 1 more flexible.

[0074] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An electromagnetic shielding device for complex electronic systems, characterized in that, include: A shielded enclosure (2) is provided inside, containing a servo system shielded cabinet (3) and a flexible waveguide (4); the waveguide (4) is connected to the servo system shielded cabinet (3); and A filter shielding cabinet (1) is installed on top of the shielding chamber (2) and connected to the waveguide (4); The filter shielding cabinet (1) is equipped with a cable outlet pipe (14); The electromagnetic shielding device for the complex electronic system further includes a connecting component, which connects the outgoing conduit (14) to the waveguide (4), or connects the waveguide (4) to the servo system shielding cabinet (3); the connecting component includes: The connecting mechanism (5) includes a first flange (51), a fixed tube (57), a sliding tube (58), a locking element (56), and a spring (59). The first flange (51) is fixedly connected to the outgoing pipe (14) or the servo system shielding cabinet (3). The fixed tube (57) is fixedly connected to the first flange (51). The sliding tube (58) is slidably connected to the inner wall of the fixed tube (57). The locking element (56) is disposed between the sliding tube (58) and the first flange (51) and is rotatably connected to the first flange (51). The locking element (56), the fixed tube (57), and the sliding tube (58) are coaxially arranged. The diameter of the locking member (56) is smaller than the inner diameter of the sliding tube (58); a slider (581) is provided on the inner wall of the sliding tube (58); multiple sets of driving grooves (562) and reset grooves (563) are opened on the curved sidewall of the locking member (56); multiple locking rods (561) are provided on the top of the locking member (56); the driving grooves (562) and the reset grooves (563) are distributed at intervals; the top of the driving groove (562) communicates with the top of an adjacent reset groove (563), and the bottom communicates with the bottom of another adjacent reset groove (563); the slider (581) is disposed in the driving groove (562) or the reset groove (563); and A quick-release mechanism (6) is fixedly connected to the end of the waveguide (4); the quick-release mechanism (6) includes a second flange (61) fixedly connected to the end of the waveguide (4) and a connector (66) fixedly connected to the second flange (61); the connector (66) is located outside the waveguide (4), and a groove (661) is provided at the end of the connector (66). A plurality of locking blocks (662) are provided on the inner wall of the groove (661), and a gap is formed between adjacent locking blocks (662) to accommodate the locking rod (561).

2. The electromagnetic shielding device for a complex electronic system as described in claim 1, characterized in that, The filter shielding cabinet (1) includes: The incoming line shielding room (11) is equipped with an incoming line pipe (111); A filter shielding chamber (12) is used to install a filter; an inlet shielding chamber (11) is located on the inlet side of the filter shielding chamber (12); the filter shielding chamber (12) has through holes (15) at both ends; and The outgoing wire shielding chamber (13) is located on the outgoing wire end side of the filter shielding chamber (12).

3. The electromagnetic shielding device for a complex electronic system as described in claim 2, characterized in that, The shielding chamber (2) is provided with an installation port, and the outgoing pipe (14) is provided on the side wall of the outgoing shielding chamber (13). The outgoing pipe (14) passes through the installation port and enters the interior of the shielding chamber (2). The connecting component is provided at the outgoing pipe (14).

4. The electromagnetic shielding device for a complex electronic system as described in claim 3, characterized in that, The inlet pipe (111) is provided with a first aviation plug (112), and the outlet pipe (14) is provided with a second aviation plug (141); the filter’s inlet line enters the inlet shielding chamber (11) through the first aviation plug (112); the filter’s outlet line is connected to the second aviation plug (141).

5. The electromagnetic shielding device for a complex electronic system as described in claim 3, characterized in that, The outlet pipe (14) is fitted with a first metal wire mesh pad (16), which is fixed on the inner wall of the outlet shielding chamber (13).

6. The electromagnetic shielding device for a complex electronic system as described in claim 5, characterized in that, A nut (17) is threaded onto the outlet pipe (14); the nut (17) is located inside the shielding chamber (2), and a gasket (18) is provided between the nut (17) and the inner wall of the shielding chamber (2).

7. The electromagnetic shielding device for a complex electronic system as described in claim 6, characterized in that, A second metal wire mesh liner (19) is provided between the gasket (18) and the inner wall of the shielding chamber (2).

8. The electromagnetic shielding device for a complex electronic system as described in claim 3, characterized in that, The connection component includes: The connecting mechanism (5) includes a first flange (51) and a fixing member (52). The first flange (51) is fixedly connected to the outlet pipe (14) or the servo system shielded cabinet (3), and the fixing member (52) is fixedly connected to the first flange (51). The quick-release mechanism (6) includes a second flange (61), a handle (62), and a pull ring (63); the second flange (61) is fixedly connected to the end of the waveguide (4), the handle (62) is hinged to the second flange (61), and the pull ring (63) is hinged to the handle (62).

9. The electromagnetic shielding device for a complex electronic system as described in claim 1 or 8, characterized in that, The connecting mechanism (5) includes a shielding groove (53), a third metal wire mesh gasket (54), and a comb-shaped spring (55). The shielding groove (53) is fixedly connected to the first flange (51), the third metal wire mesh gasket (54) is fixedly connected to the bottom of the shielding groove (53), and the comb-shaped spring (55) is fixedly connected to the inner wall of the shielding groove (53). The shielding groove (53) is annular. The quick-release mechanism (6) includes a shielding switch (64) and a fourth metal wire mesh gasket (65). The shielding switch (64) is fixedly connected to the second flange (61), and the fourth metal wire mesh gasket (65) is disposed between the shielding switch (64) and the second flange (61). After the shielding switch (64) is inserted into the shielding groove (53), the shielding switch (64) abuts against and squeezes the comb spring (55).

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