Electromagnetic shielding device of complex electronic system

Abstract

The invention provides an electromagnetic shielding device of a complex electronic system, which belongs to the technical field of electromagnetic shielding of radio telescopes and comprises a filter shielding cabinet, a waveguide tube and a connecting mechanism. The filter shielding cabinet is arranged at the top of the shielding cabin and located outside the shielding cabin; a servo system shielding cabinet is arranged in the shielding cabin; the filter shielding cabinet is provided with a wire outlet pipe, the shielding cabin is provided with a mounting port, and the wire outlet pipe penetrates through the mounting port to enter the shielding cabin. And one end of the waveguide tube is connected with the filtering shielding mechanism, and the other end of the waveguide tube is connected with the servo system shielding cabinet. And the connecting mechanism is arranged at the wire outlet pipe and is used for connecting the wire outlet pipe and the waveguide tube or connecting the waveguide tube and the servo system shielding cabinet. The filter shielding cabinet is arranged outside the shielding cabin, the internal space of the shielding cabin is not occupied, and the problems that the space in the shielding cabin is narrow, and the filter shielding cabinet is difficult to install are solved.

Description

Technical Field

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

[0002] Radio telescopes, as highly sensitive instruments for detecting weak cosmic radio signals, have electronic systems that are extremely sensitive to electromagnetic interference. Cosmic radio signals typically have intensities in the nanovolt range, while ambient man-made electromagnetic noise (e.g., from communication base stations and power equipment) can reach millivolts, a difference of a million times. Without effective shielding, electromagnetic interference can overwhelm valid signals, distorting or even invalidating observational data. Currently, mainstream electromagnetic shielding technologies include conductive coatings, metal shielding cabins, and multi-layer composite shielding structures. Grounded metal shielding cabins are the most widely used, using the Faraday cage principle to divert interfering currents to the ground. Typical shielding effectiveness can exceed 60dB. Furthermore, hybrid solutions combining absorbing materials with metal shielding are often used for high-frequency applications. For example, ferrite tiles can be laid on the inner walls of the shielding cabin to suppress resonance effects.

[0003] Existing electromagnetic shielding technologies suffer from the following drawbacks: For grounded shielding, to achieve shielding effectiveness exceeding 80dB across the 30MHz-18GHz wideband, the metal shielding cabin wall must be at least 3mm thick and maintain structural continuity, resulting in a single-side dimension generally exceeding 50cm. To minimize signal transmission loss, radio telescope electronics systems require sensitive modules such as preamplifiers and mixers to be installed near the feed horn. This area, constrained by the antenna's mechanical structure, typically only allows for a shielded space of 20cm x 20cm x 15cm. This conflict forces engineers to compromise, such as reducing the cabin wall thickness to less than 1mm, which reduces low-frequency shielding effectiveness by 40%; or employing a discontinuous spliced structure, which introduces electromagnetic leakage at the seams. Summary of the Invention

[0004] The object of the present invention is to provide an electromagnetic shielding device for a complex electronic system, aiming to solve the problem that the space reserved for the electromagnetic shielding device is small and the volume of the electromagnetic shielding device is large.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is to provide an electromagnetic shielding device for a complex electronic system, comprising: A shielding cabin is provided with a servo system shielding cabinet and a flexible waveguide tube inside; the waveguide tube is connected to the servo system shielding cabinet; and The filter shielding cabinet is arranged on the top of the shielding cabin and connected to the waveguide. In a possible implementation, the filter shielding cabinet includes: Incoming wire shielding room, equipped with incoming wire pipe; The filter shielding room is used to install the filter; the incoming line shielding room is arranged on the incoming line end side of the filter shielding room; both ends of the filter shielding room are provided with wire holes; and The outgoing line shielding room is arranged at one side of the outgoing line end of the filter shielding room.

[0006] In a possible implementation, the filter shielding cabinet is provided with an outlet pipe, and the outlet pipe is arranged on a side wall of the outlet shielding room; The electromagnetic shielding device of the complex electronic system also includes a connecting component, which connects the outlet pipe and the waveguide tube, or connects the waveguide tube and the servo system shielding cabinet; an installation opening is opened on the shielding cabin, and the outlet pipe passes through the installation opening to enter the interior of the shielding cabin; the connecting component is arranged at the outlet pipe.

[0007] In a possible implementation, a first aviation plug is provided in the incoming line pipe, and a second aviation plug is provided in the outgoing line pipe; the incoming line of the filter enters the incoming line shielding room through the first aviation plug; and the outgoing line of the filter is connected to the second aviation plug.

[0008] In a possible implementation, a first metal mesh gasket is sleeved on the outlet pipe, and the first metal mesh gasket is fixed to the inner wall of the outlet shielding room.

[0009] In a possible implementation, a nut is threadedly connected to the outlet pipe; the nut is disposed inside the shielding cabin, and a gasket is provided between the nut and the inner wall of the shielding cabin.

[0010] In a possible implementation, a second metal mesh gasket is provided between the gasket and the inner wall of the shielding cabin.

[0011] In a possible implementation, the connection component includes: A connecting mechanism includes a first flange and a fixing member, wherein the first flange is fixedly connected to the outlet pipe or the servo system shielding cabinet, and the fixing member is fixedly connected to the first flange; and The quick-release mechanism comprises a second flange, a handle and a pull ring; the second flange is fixedly connected to the end of the waveguide tube, the handle is hinged on the second flange, and the pull ring is hinged on the handle.

[0012] In a possible implementation, the connection component includes: The connecting mechanism comprises a first flange, a fixed tube, a sliding tube and a locking piece, wherein the first flange is fixedly connected to the outlet tube or the servo system shielding cabinet, the fixed tube is fixedly connected to the fixed tube on the first flange, the sliding tube is slidably connected to the inner wall of the fixed tube, and the locking piece is arranged with a spring between the sliding tube and the first flange and is rotatably connected to the first flange; the locking piece, the fixed tube and the sliding tube are coaxially arranged, and the diameter of the locking piece is smaller than the inner diameter of the sliding tube; a slider is provided on the inner wall of the sliding tube, and multiple groups of driving grooves and reset grooves are provided on the curved side wall of the locking piece, and multiple locking rods are provided on the top of the locking piece; the driving grooves and the reset grooves are spaced apart, the top of the driving groove is communicated with the top of an adjacent reset groove, and the bottom is communicated with the bottom of another adjacent reset groove; the slider is provided in the driving groove or the reset groove; and A quick-release mechanism is fixedly connected to the end of the waveguide tube; the quick-release mechanism includes a second flange fixedly connected to the end of the waveguide tube and a connector fixedly connected to the second flange; the connector is located outside the waveguide tube, a slide groove is provided at the end of the connector, a plurality of locking blocks are provided on the inner wall of the slide groove, and a gap is formed between adjacent locking blocks for accommodating the locking rod.

[0013] In one possible implementation, the connecting mechanism includes a shielding slot, a third metal mesh gasket, and a comb-shaped spring, wherein the shielding slot is fixedly connected to the first flange, the third metal mesh gasket is fixedly connected to the bottom of the shielding slot, and the comb-shaped spring is fixedly connected to the inner wall of the shielding slot; the shielding slot is annular; The quick-release mechanism includes a shielding knife and a fourth metal mesh gasket. The shielding knife is fixedly connected to the second flange, and the fourth metal mesh gasket is arranged between the shielding knife and the second flange. After the shielding knife is inserted into the shielding slot, the shielding knife abuts against and squeezes the comb-shaped spring.

[0014] The electromagnetic shielding device for complex electronic systems provided by the present invention has the following advantages: compared with the prior art, the electromagnetic shielding device for complex electronic systems of the present invention positions the filter shielding cabinet outside the shielding cabin, eliminating the space inside the shielding cabin and resolving the problem of limited space within the shielding cabin and the difficulty of installing the filter shielding cabinet. Furthermore, a flexible waveguide is used to connect the filter shielding mechanism and the servo system shielding cabinet, allowing operators to adjust the position of the filter shielding cabinet according to the spatial location of the electronic system, making the installation of the filter shielding cabinet more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 A schematic structural diagram of an electromagnetic shielding device for a complex electronic system provided by a first embodiment of the present invention; Figure 2 A schematic structural diagram of a filter shielding cabinet provided in an embodiment of the present invention; Figure 3 A schematic structural diagram of a connecting mechanism provided by an embodiment of the present invention; Figure 4 A schematic structural diagram of an electromagnetic shielding device for a complex electronic system provided by a second embodiment of the present invention; Figure 5 A schematic structural diagram of a connecting mechanism provided in a second embodiment of the present invention; Figure 6 Schematic diagram of the structure of the connecting piece and the locking block in the second embodiment of the present invention.

[0017] Description of reference numerals: 1. Filter shielding cabinet; 11. Incoming cable shielding chamber; 111. Incoming cable conduit; 112. First aviation plug; 12. Filter shielding chamber; 13. Outgoing cable shielding chamber; 14. Outgoing cable conduit; 141. Second aviation plug; 15. Wire hole; 16. First wire mesh gasket; 17. Nut; 18. Gasket; 19. Second wire mesh gasket; 2. Shielding cabin; 3. Servo system shielding cabinet; 4. Waveguide; 5. Connecting mechanism; 51. First flange; 52 , fixing part; 53, shielding groove; 54, third metal mesh gasket; 55, comb-shaped spring; 56, locking part; 561, locking rod; 562, driving groove; 563, reset groove; 57, fixing tube; 58, sliding tube; 581, slider; 59, spring; 6, quick release mechanism; 61, second flange; 62, handle; 63, pull ring; 64, shielding knife; 65, fourth metal mesh gasket; 66, connecting part; 661, slide groove; 662, locking block. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] In a radio telescope's electromagnetic shielding system, a filter shielding cabinet must be installed within the shielding cabin and connected to the servo system shielding cabinet to effectively block electromagnetic interference and ensure the purity and accuracy of the radio telescope's received signals. However, a prominent problem currently faced is that the shielding cabin contains numerous electronic system cabinets and the internal space is extremely narrow, resulting in a severe lack of space for the filter shielding cabinet. From a system design perspective, the connection between the filter shielding cabinet and the servo system shielding cabinet is a critical step in ensuring the integrity of the electromagnetic shielding. Working together, they effectively filter and shield external electromagnetic interference, creating a stable electromagnetic environment for the radio telescope. However, inadequate space planning in the shielding chamber made it difficult to find a suitable installation location for the filter shielding cabinet. This limited space not only increased the difficulty of construction and installation, but also could affect the connection quality between the filter shielding cabinet and the servo system shielding cabinet due to forced installation or compromised layout, further weakening the effectiveness of the entire electromagnetic shielding system. In addition, insufficient space may also prevent the filter shielding cabinet from being deployed according to optimal installation specifications, affecting its heat dissipation performance and ease of maintenance. The filter generates heat during operation. If the heat dissipation space is limited, it may cause the equipment temperature to be too high, accelerate equipment aging, reduce service life, and even cause failures. At the same time, the small space also makes it difficult to carry out subsequent inspection and maintenance work, increasing operation and maintenance costs and time costs. In order to solve the problem that the space in the shielding cabin is too small to install the filter shielding cabinet, an embodiment of the present invention provides an electromagnetic shielding device for complex electronic systems.

[0020] Reference Figures 1 to 6 , the electromagnetic shielding device for complex electronic systems provided by the present invention is now described.

[0021] The electromagnetic shielding device for complex electronic systems includes a shielding cabin 2 and a filter shielding cabinet 1. Inside the shielding cabin 2 are located 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 mounted on top of the shielding cabin 2 and connected to the waveguide 4.

[0022] Waveguide 4, the tubular structure that guides electromagnetic wave transmission, is crucially important for its material selection. Copper, due to its high electrical conductivity and excellent processing properties, is often used in precision equipment with high signal quality requirements. However, it is expensive and easily oxidized, requiring surface treatment. Aluminum is low-cost and low-density, making it suitable for large-scale applications. Its slightly lower electrical conductivity is often compensated for through silver plating. Stainless steel offers strong mechanical strength and corrosion resistance, making it suitable for harsh environments, but its electrical conductivity is poor, making it more suitable for applications where mechanical performance is a priority. Furthermore, alloys such as brass and bronze are often used at the interface of waveguide 4, offering both electrical conductivity and wear resistance. Non-metallic dielectric waveguides, based on high-dielectric-constant insulating materials, are suitable for millimeter-wave and optical wave transmission, but their high transmission losses limit their application.

[0023] The expansion and contraction and bending properties of the waveguide tube 4 enable it to adapt to complex application scenarios. The expansion and contraction properties are achieved through a sliding sleeve structure or a bellows structure. The former uses the sliding of inner and outer sleeves to adjust the length, combined with a precise conductive contact design to ensure signal continuity; the latter achieves expansion and contraction by virtue of the elastic deformation of the corrugated tube wall, and is often used in scenarios where the length is dynamically adjusted. The bending properties are achieved by relying on a flexible waveguide tube 4 or a segmented hinged structure. The flexible waveguide tube 4 is composed of a thin metal tube wall and a flexible support structure, allowing bending within a certain curvature; the segmented hinged structure achieves flexible steering through rigid segments and hinged joints. However, there are performance challenges in the expansion and contraction and bending of the waveguide tube 4. For example, the decrease in the conductivity of the contact surface leads to increased losses, and frequent activities can cause material fatigue. These challenges need to be optimized through precision machining and the use of high-strength alloys.

[0024] This complex electronic system electromagnetic shielding device places the filter shielding cabinet 1 outside the shielding cabin 2, resolving the issue of the limited space inside the shielding cabin 2 making installation of the filter shielding cabinet 1 difficult. In traditional solutions, numerous electronic system cabinets occupy a significant amount of space in the shielding cabin 2, leaving the filter shielding cabinet 1 unable to be deployed due to insufficient mounting space, or compromising the connection quality with the servo system shielding cabinet 3. This solution, however, places the filter shielding cabinet 1 externally, eliminating the space inside the shielding cabin 2. A waveguide 4 ensures a proper connection between the filter shielding cabinet 1 and the servo system shielding cabinet 3, ensuring the integrity of the electromagnetic shielding system while avoiding installation difficulties and performance degradation caused by insufficient space.

[0025] The retractable and bendable properties of the waveguide tube 4 give the filter shielding cabinet 1 a flexible installation location. The waveguide tube 4 is retractable by means of structures such as sliding sleeves and bellows, and is bent by means of flexible tube walls or segmented hinges, and can adapt to complex spatial layouts. When the filter shielding cabinet 1 is set outside the shielding cabin 2, the waveguide tube 4 can flexibly adjust its length and direction according to the relative positions of the two and the internal wiring requirements of the shielding cabin 2, bypassing obstacles such as other electronic system cabinets in the cabin, and accurately connecting the outlet pipe 14 of the filter shielding cabinet 1 and the connection port of the servo system shielding cabinet 3. This flexibility not only reduces the difficulty of installation, but also reduces the signal loss and mechanical stress caused by hard connection or fixed path wiring, ensuring efficient transmission of electromagnetic signals. It also provides convenience for subsequent equipment maintenance and upgrades, so that the entire electromagnetic shielding device can still operate stably and reliably in complex environments.

[0026] In a possible implementation, the filter shielding cabinet 1 includes: an incoming line shielding room 11 , a filter shielding room 12 , and an outgoing line shielding room 13 .

[0027] The incoming line shielding chamber 11 is provided with an incoming line pipe 111. The filter shielding chamber 12 is used to install the filter. The incoming line shielding chamber 11 is located on the incoming line side of the filter shielding chamber 12. The filter shielding chamber 12 has wire holes 15 at both ends. The outgoing line shielding chamber 13 is located on the outgoing line side of the filter shielding chamber 12.

[0028] By dividing the interior of the filter shielding cabinet 1 into independent incoming line shielding room 11, filter shielding room 12 and outgoing line shielding room 13, a segmented shielding structure is formed, which can isolate the input, processing and output lines of the filter and reduce the mutual influence of electromagnetic interference in different areas; the incoming line pipe 111 and the outgoing line pipe 14 are respectively arranged in different shielding rooms to realize centralized management of input and output lines and avoid shielding loopholes caused by cluttered lines; the setting of the wire hole 15 facilitates the passage and connection of the filter line and ensures the orderliness of signal transmission. At the same time, the independent setting of each shielding room helps to improve the overall shielding effectiveness, so that the filter can work stably in an independent space and enhance the electromagnetic interference suppression capability of the entire electromagnetic shielding device to complex electronic systems.

[0029] Optionally, the filter shielding cabinet 1 may be constructed of steel, stainless steel, or aluminum alloy. Steel cabinets offer excellent shielding properties, effectively blocking external electromagnetic interference. They are relatively low-cost, suitable for large-scale production, and widely used in fields such as industrial control and communications, which require high electromagnetic shielding requirements. However, steel cabinets are heavy, difficult to transport and install, and prone to rust, requiring anti-rust treatment such as spraying with anti-rust paint or galvanizing.

[0030] In a specific embodiment of the filter shielding cabinet 1, multiple partitions are provided within the cabinet, each with a cable hole 15. These partitions divide the interior of the filter shielding cabinet into multiple independent spaces. These multiple spaces include at least a central filter shielding chamber 12, and an incoming cable shielding chamber 11 and an outgoing cable shielding chamber 13 located on opposite sides of the filter shielding chamber 12. The incoming cable shielding chamber 11 is provided with an incoming cable conduit 111, and the outgoing cable conduit 14 is provided within the outgoing cable conduit 13.

[0031] In one possible implementation, the filter shielding cabinet 1 is provided with an outlet pipe 14, which is disposed on a side wall of the outlet shielding chamber 13. The electromagnetic shielding device for a complex electronic system further includes a connecting assembly 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 is provided with an installation opening, through which the outlet pipe 14 passes and enters the interior of the shielding chamber 2; the connecting assembly is disposed on the outlet pipe 14.

[0032] The adaptable structure of the connection assembly ensures reliable electrical connection and mechanical fixation between the outlet conduit 14, the waveguide 4, and the servo system shielding cabinet 3, ensuring stable signal transmission and the integrity of the shielding structure. The flexible waveguide 4, combined with the flexible assembly features of the connection mechanism 5, allows the connection path between the external filter shielding cabinet 1 and the servo system shielding cabinet 3 within the cabin to be dynamically adjusted based on the spatial layout. This overcomes the location limitations of traditional hard connections and enhances system installation flexibility and environmental adaptability. The connection assembly is located on the outlet conduit 14, concentrating the signal transmission interface near the mounting opening of the shielding cabin 2. This reduces the number of openings in the shielding cabin 2, effectively reducing the risk of electromagnetic leakage, further enhancing overall shielding effectiveness, and ensuring the stable operation of complex electronic systems in strong electromagnetic interference environments.

[0033] In one possible implementation, a first aviation plug 112 is provided in the incoming pipe 111 , and a second aviation plug 141 is provided in the outgoing pipe 14 ; the incoming wire of the filter enters the incoming wire shielding room 11 through the first aviation plug 112 ; the outgoing wire of the filter is connected to the second aviation plug 141 .

[0034] The filter is installed in the filter shielding chamber 12. The filter input line is connected to the inside of the first aviation plug 112, and the external signal input line is connected to the outside of the first aviation plug 112. The filter output line is connected to the inside of the second aviation plug 141, and the signal output line is connected to the outside of the second aviation plug 141. External electrical signals enter the filter through the external signal input line, the first aviation plug 112, and the filter input line. After being processed by the filter, they are output through the filter output line, the second aviation plug 141, and the signal output line. The plug-in connection method of the aviation plug facilitates the installation, maintenance, and replacement of the filter, improving the convenience of system operation. The compact plug layout can reduce the exposed length of the line, reduce the risk of electromagnetic leakage caused by the exposed line, and further enhance the anti-interference capability of the entire electromagnetic shielding device.

[0035] In one possible implementation, a first wire mesh gasket 16 is sleeved over the outlet conduit 14 and fixed to the inner wall of the outlet shielding chamber 13. The first wire mesh gasket 16 is used to isolate the outlet shielding chamber 13 from the shielding cabin 2 and to seal the gap between the outlet conduit 14 and the installation opening, thereby preventing external interference signals from entering the shielding cabin 2 through the gaps between the outlet shielding chamber 13 and the shielding cabin 2 and between the outlet conduit 14 and the installation opening.

[0036] In a possible implementation, a nut 17 is externally connected to the outlet pipe 14 ; the nut 17 is disposed inside the shielding cabin 2 , and a gasket 18 is provided at the end of the nut 17 , which also abuts against the shielding cabin 2 .

[0037] The threaded connection between nut 17 and outlet tube 14 secures outlet tube 14 to the mounting opening of shielding cabin 2, ensuring a secure connection. A gasket 18, positioned between nut 17 and the inner wall of shielding cabin 2, increases the contact area and disperses the pressure exerted by nut 17 on the inner wall of shielding cabin 2, preventing damage to shielding cabin 2 caused by excessive localized force. Furthermore, this structure, combined with first wire mesh gasket 16, further enhances the seal between outlet tube 14 and shielding cabin 2, effectively sealing gaps, reducing electromagnetic leakage, and improving the shielding effectiveness of the entire shielding device. Furthermore, installation and removal are convenient, facilitating subsequent maintenance and commissioning.

[0038] In a possible implementation, a second metal mesh gasket 19 is provided between the gasket 18 and the inner wall of the shielding cabin 2 .

[0039] When installing filter shielding cabinet 1, insert the connecting pipe into the installation opening from the outside of shielding cabin 2. Then, install and tighten second wire mesh gasket 19 and gasket 18 onto the connecting pipe. Nut 17 is then used to clamp second wire mesh gasket 19 and gasket 18 together, so that second wire mesh gasket 19 abuts the inner wall of shielding cabin 2 and seals the gap between outlet pipe 14 and the installation opening. The dual shielding of first wire mesh gasket 16 and second wire mesh gasket 19 improves the shielding effectiveness of filter shielding cabinet 1.

[0040] 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 fixing member 52. The first flange 51 is fixedly connected to the outlet pipe 14 or the servo system shielding 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.

[0041] To assemble the connection assembly, after the connection mechanism 5 and quick-release mechanism 6 are installed, the pull ring 63 is placed over the fixing member 52. At this point, the handle 62 forms a predetermined angle with the first and second flanges 51, 61. The handle 62 is then rotated toward the waveguide 4 until it is parallel to the first and second flanges 51, 61. During this process, the handle 62 gradually draws the pull ring 63 closer until it is perpendicular to the first and second flanges 51, 61. At this point, the pull ring 63 is at its tightest, completing the connection assembly. To disassemble the connection, simply rotate the handle 62 in the opposite direction to loosen the pull ring 63 and remove it from the fixing member 52.

[0042] In a possible implementation, the connection assembly includes a connection mechanism 5 and a quick-release mechanism 6 .

[0043] The connecting mechanism 5 includes a first flange 51, a fixed tube 57, a sliding tube 58, and a locking member 56. The first flange 51 is fixedly connected to the outlet tube 14 or the servo system shield cabinet 3. The fixed tube 57 is fixedly connected to the fixed tube 57 on the first flange 51. The sliding tube 58 is slidably connected to the inner wall of the fixed tube 57. The locking member 56 is disposed between the spring 59 and the sliding tube 58 and is rotatably connected to the first flange 51. The locking member 56, the fixed tube 57, and the sliding tube 58 are coaxially arranged, and 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, and the curved sidewall of the locking member 56 is provided with multiple sets of drive grooves 562 and reset grooves 563. The top of the locking member 56 is provided with multiple locking rods 561. The driving groove 562 and the reset groove 563 are distributed at intervals, the top of the driving groove 562 is communicated with the top of an adjacent reset groove 563, and the bottom is communicated with the bottom of another adjacent reset groove 563; the slider 581 is set in the driving groove 562 or the reset groove 563.

[0044] The quick-release mechanism 6 is fixedly connected to the end of the waveguide tube 4; the quick-release mechanism 6 includes a second flange 61 fixedly connected to the end of the waveguide tube 4 and a connector 66 fixedly connected to the second flange 61; the connector 66 is located outside the waveguide tube 4, and a slide 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 slide groove 661, and a gap is formed between adjacent locking blocks 662 to accommodate the locking rod 561.

[0045] 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 mounted in the guide groove. The guide block and the guide groove act together to allow the sliding tube 58 to slide only axially within the fixed tube 57 and not rotate about its own axis. A spring 59 acts to hold the sliding tube 58 in the center of the fixed tube 57. As the sliding tube 58 slides into the fixed tube 57, the spring 59 is compressed and stores force.

[0046] In this embodiment, the bottom portion is defined as the direction toward the first flange 51, while the top portion is defined as 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 linear groove extending along the axis of the locking member 56, and the top portion is a transition groove that communicates with the top portion of the adjacent drive groove 562. A slider 581 is disposed in either the reset groove 563 or the drive groove 562. When the sliding tube 58 is at the top, the slider 581 is at the topmost portion of the drive groove 562.

[0047] When the sliding tube 58 begins to descend under force, 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 return groove 563. At this time, the spring 59 is compressed to its shortest position. When the force on the sliding tube 58 is released, the spring 59 gradually drives the sliding tube 58 back to its original position. At this time, the lifting tube drives the slider 581 to slide along the return groove 563. When the sliding tube 58 returns to its highest position, the slider 581 slides to the top of the return groove 563 and enters the top of the driving groove 562.

[0048] 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. A cylindrical slot 661 is defined at the end of the connector 66. Multiple locking blocks 662 are located at the openings of the slots 661. A gap is provided between adjacent locking blocks 662 to allow the locking rods 561 to pass through. The diameter of the connector 66 is the same as the outer diameter of the lift tube.

[0049] When installing the connector assembly, align the locking rod 561 with the gap between the locking blocks 662. Then, insert the shield blade 64 into the shield slot 53 while the connector 66 pushes the sliding tube 58. The locking rod 561 enters the slot 661 through the gap between the locking blocks 662. As the connector 66 and sliding tube 58 slide, the locking rod 561 gradually rotates, eventually becoming misaligned with the gap between the locking blocks 662. When the external force disappears, the spring 59 forces the sliding tube 58 back into place. The locking blocks 662 then block the locking rod 561, preventing the connector 66 from disengaging from the locking member 56, thus locking the connector assembly. To disassemble the connector assembly, push the connector 66 and sliding tube 58 again, rotating the locking rod 561 so that it is once again positioned within the gap between the adjacent locking blocks 662, unlocking the connector 66 from the locking member 56.

[0050] In one possible implementation, the connecting mechanism 5 includes a shielding slot 53, a third metal mesh gasket 54, and a comb-shaped spring 55. The shielding slot 53 is fixedly connected to the first flange 51, the third metal mesh gasket 54 is fixedly connected to the bottom of the shielding slot 53, and the comb-shaped spring 55 is fixedly connected to the inner wall of the shielding slot 53. The shielding slot 53 is annular. The quick-release mechanism 6 includes a shielding knife 64 and a fourth metal mesh gasket 65. The shielding knife 64 is fixedly connected to the second flange 61, and the fourth metal mesh gasket 65 is arranged between the shielding knife 64 and the second flange 61. After the shielding knife 64 is inserted into the shielding slot 53, the shielding knife 64 abuts against and squeezes the comb-shaped spring 55.

[0051] The comb-shaped spring 55 is annular, with its center portion protruding toward the center of the shielding slot 53. Two comb-shaped springs 55 are provided, mounted on opposing sidewalls of the shielding slot 53. To install the connecting mechanism, the shielding blade 64 is inserted into the shielding slot 53 and positioned between the two comb-shaped springs 55.

[0052] The beneficial effect of the electromagnetic shielding device for complex electronic systems provided by the present invention is that: compared with the prior art, the electromagnetic shielding device for complex electronic systems of the present invention sets the filter shielding cabinet 1 outside the shielding cabin 2, does not occupy the space inside the shielding cabin 2, and solves the problem that the space in the shielding cabin 2 is small and it is difficult to install the filter shielding cabinet 1. At the same time, an outlet pipe 14 is opened on the filter shielding cabinet 1, and the wires of the filter are concentrated in the outlet pipe 14. Therefore, only one circular hole needs to be opened on the side wall of the shielding cabin 2, which reduces the number of openings in the shielding cabin 2, is beneficial to improving the shielding efficiency of the shielding cabin 2, and simplifies the shielding structure. At the same time, the waveguide tube 4 and the connecting assembly are used to connect the filter shielding mechanism and the servo system shielding cabinet 3. The staff can adjust the position of the filter shielding cabinet 1 according to the spatial position of the electronic system, making the installation position of the filter shielding cabinet 1 more flexible. The above description is only 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 in the scope of protection of the present invention.

Claims

1. An electromagnetic shielding device for a complex electronic system, characterized in that: include: A shielding cabin (2) is provided with a servo system shielding cabinet (3) and a flexible waveguide (4) therein; the waveguide (4) is connected to the servo system shielding cabinet (3); and A filter shielding cabinet (1) is arranged on the top of the shielding cabin (2) and connected to the waveguide tube (4).

2. The electromagnetic shielding device for complex electronic systems according to claim 1, wherein: The filter shielding cabinet (1) comprises: An incoming line shielding room (11) is provided with an incoming line pipe (111); A filter shielding chamber (12) is used to install a filter; the incoming line shielding chamber (11) is arranged on one side of the incoming line end of the filter shielding chamber (12); both ends of the filter shielding chamber (12) are provided with wire holes (15); and The outgoing line shielding chamber (13) is arranged on one side of the outgoing line end of the filter shielding chamber (12).

3. The electromagnetic shielding device for complex electronic systems according to claim 2, characterized in that: The filter shielding cabinet (1) is provided with an outlet pipe (14), and the outlet pipe (14) is arranged on the side wall of the outlet shielding room (13); The electromagnetic shielding device of the complex electronic system further comprises a connecting component, wherein the connecting component connects the outlet pipe (14) and the waveguide tube (4), or connects the waveguide tube (4) and the servo system shielding cabinet (3); an installation opening is provided on the shielding cabin (2), and the outlet pipe (14) passes through the installation opening and enters the interior of the shielding cabin (2); and the connecting component is arranged at the outlet pipe (14).

4. The electromagnetic shielding device for complex electronic systems according to claim 3, wherein: 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 inlet line of the filter enters the inlet shielding room (11) through the first aviation plug (112); and the outlet line of the filter is connected to the second aviation plug (141).

5. The electromagnetic shielding device for complex electronic systems according to claim 3, characterized in that: The outlet pipe (14) is sleeved with a first metal mesh pad (16), and the first metal mesh pad (16) is fixed on the inner wall of the outlet shielding room (13).

6. The electromagnetic shielding device for complex electronic systems according to claim 5, characterized in that: A nut (17) is threadedly connected to the outlet pipe (14); the nut (17) is arranged inside the shielding cabin (2), and a gasket (18) is provided between the nut (17) and the inner wall of the shielding cabin (2).

7. The electromagnetic shielding device for a complex electronic system according to claim 6, wherein: A second metal wire mesh gasket (19) is provided between the gasket (18) and the inner wall of the shielding cabin (2).

8. The electromagnetic shielding device for a complex electronic system according to claim 3, wherein: The connection component includes: A connecting mechanism (5) comprising a first flange (51) and a fixing member (52), wherein the first flange (51) is fixedly connected to the outlet pipe (14) or the servo system shielding cabinet (3), and the fixing member (52) is fixedly connected to the first flange (51); and The quick-release mechanism (6) comprises 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 tube (4), the handle (62) is hinged on the second flange (61), and the pull ring (63) is hinged on the handle (62).

9. The electromagnetic shielding device for a complex electronic system according to claim 3, wherein: The connection component includes: The connecting mechanism (5) comprises a first flange (51), a fixed tube (57), a sliding tube (58), a locking member (56) and a spring (59), wherein the first flange (51) is fixedly connected to the outlet tube (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 member (56) is arranged between the sliding tube (58) and the first flange (51), and is rotatably connected to the first flange (51); the locking member (56), the fixed tube (57) and the sliding tube (58) are coaxially arranged, and the 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); a plurality of driving grooves (562) and reset grooves (563) are provided on the curved side wall of the locking member (56); a plurality of locking rods (561) are provided on the top of the locking member (56); the driving grooves (562) and the reset grooves (563) are spaced apart, the top of the driving groove (562) is communicated with the top of an adjacent reset groove (563), and the bottom is communicated with the bottom of another adjacent reset groove (563); the slider (581) is provided 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 tube (4); the quick-release mechanism (6) includes a second flange (61) fixedly connected to the end of the waveguide tube (4), and a connecting piece (66) fixedly connected to the second flange (61); the connecting piece (66) is located outside the waveguide tube (4), and a sliding groove (661) is provided at the end of the connecting piece (66), and a plurality of locking blocks (662) are provided on the inner wall of the sliding groove (661), and a gap is formed between adjacent locking blocks (662) for accommodating the locking rod (561).

10. The electromagnetic shielding device for a complex electronic system according to claim 8 or 9, characterized in that: The connecting mechanism (5) comprises a shielding slot (53), a third metal mesh gasket (54) and a comb-shaped reed (55); the shielding slot (53) is fixedly connected to the first flange (51); the third metal mesh gasket (54) is fixedly connected to the bottom of the shielding slot (53); and the comb-shaped reed (55) is fixedly connected to the inner wall of the shielding slot (53); the shielding slot (53) is annular; The quick-release mechanism (6) includes a shielding knife (64) and a fourth metal wire mesh gasket (65), wherein the shielding knife (64) is fixedly connected to the second flange (61), and the fourth metal wire mesh gasket (65) is arranged between the shielding knife (64) and the second flange (61); after the shielding knife (64) is inserted into the shielding slot (53), the shielding knife (64) abuts against the comb-shaped reed (55) and squeezes the comb-shaped reed (55).

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