An anti-electromagnetic interference airport enclosure security weak current junction box structure

Abstract

The application relates to an anti-electromagnetic interference airport perimeter security weak current junction box structure, which relates to the technical field of junction boxes and comprises a weak current box body, wherein the weak current box body is provided with an electromagnetic interference protection mechanism, one side or both sides of the weak current box body are respectively provided with cable sealing anti-dragging mechanisms, the periphery of the weak current box body is further connected with a damp-proof mechanism, and the front end of the weak current box body is sealingly and fixedly connected with a door. The new anti-electromagnetic interference airport perimeter security weak current junction box structure can effectively improve the electromagnetic interference protection capability of the weak current junction box structure, improve the dustproof capability and damp-proof capability, timely alarm and stop in the case of close-range dragging, notify the management personnel to perform remote management, and effectively prevent the risk of joint falling in the junction box.

Description

Technical Field

[0001] This invention relates to the field of junction box technology, specifically to a junction box structure for airport perimeter security against electromagnetic interference. Background Technology

[0002] Electromagnetic interference can intrude into low-voltage systems through high-voltage power lines, lightning, or high-frequency signals, causing signal distortion, equipment malfunctions, or even damage. For example: Strong and weak current crossings: When high-voltage lines and low-voltage cables are too close, the electromagnetic field generated by the high-voltage line can interfere with the low-voltage signal, causing network latency, flickering monitor images, and other problems. Lightning induction: Transient electromagnetic pulses generated during lightning strikes can intrude into low-voltage equipment through power or signal lines, causing damage. Low-voltage boxes prevent electromagnetic interference to ensure stable signal transmission for low-voltage equipment (such as network, monitoring, and communication systems), avoiding equipment malfunctions or data errors caused by interference.

[0003] Furthermore, existing low-voltage boxes may experience connector detachment due to cable dragging. Excessive moisture inside the box can also lead to condensation and short circuits at the connectors. Poor sealing of the low-voltage box can also allow dust and other substances to enter, interfering with the normal operation of the circuit.

[0004] Since the security of low-voltage electrical lines at airports is of great importance to the safe take-off and landing of aircraft, it is necessary to improve the structure of the low-voltage junction box for airport perimeter security, based on the problems existing in the above-mentioned technologies. Utility Model Content

[0005] This invention discloses a low-voltage junction box structure for airport perimeter security that resists electromagnetic interference, with the aim of solving the problems existing in the background technology.

[0006] To achieve the above objectives, the technical solution of this invention is as follows: An electromagnetic interference resistant airport perimeter security low-voltage junction box structure includes a low-voltage box body, an electromagnetic interference protection mechanism, a cable sealing and anti-drag mechanism on one or both sides of the low-voltage box body, a moisture-proof mechanism connected to the periphery of the low-voltage box body, and a door that is sealed and fixed to the front end of the low-voltage box body.

[0007] Preferably, the low-voltage box body is a cubic shell structure with an open front end. The electromagnetic interference protection mechanism includes a first electromagnetic protection layer and a second electromagnetic protection layer respectively disposed on the inner and outer surfaces of the shell structure. An insulating material layer is disposed between the first electromagnetic protection layer and the second electromagnetic protection layer. The front port of the shell structure is provided with an annular groove, and a sealing ring is disposed in the annular groove. The inner surface of the door facing the annular groove is provided with an annular protrusion. The annular protrusion cooperates with the annular groove and is used to press the sealing ring tightly through a locking mechanism.

[0008] Preferably, the first electromagnetic shielding layer is a galvanized steel plate layer, the second electromagnetic shielding layer is an aluminum alloy material layer, and the insulating material layer is foam glass.

[0009] Preferably, the front ends of the four corners of the inner side of the shell structure are fixedly connected to insert blocks, the front surface of the back plate of the shell structure is provided with a sleeve along the direction perpendicular to the back plate, the sleeve is provided with internal threads, the middle of the door is screwed with a threaded rod, the threaded rod is threadedly connected to the sleeve and forms a locking mechanism, the four corners of the inner surface of the door are respectively provided with slots that cooperate with the insert blocks, one end of the threaded rod passes through the outer surface of the door and is fixedly connected to a handle, the inner and outer surfaces of the door are also provided with a first electromagnetic protection layer and a second electromagnetic protection layer, and the inner surface of the door is also provided with several stiffening plates to prevent the door from deforming.

[0010] Preferably, the cable sealing and anti-drag mechanism includes a cable conduit fixedly connected to the outer wall of the housing structure and communicating with the interior of the housing structure, an elastic rubber tube coaxially disposed inside the cable conduit, and a tapered elastic tube fixedly connected between the cable conduit and the elastic rubber tube. The large-diameter end of the tapered elastic tube is sealed and fixedly connected to the inner wall of the cable conduit, and the small-diameter end is sealed and fixedly connected to the outer wall of the elastic rubber tube. The large-diameter end is located on the side away from the housing relative to the small-diameter end, and the inner wall of the elastic rubber tube is tightly fitted to the surface of the cable passing through it.

[0011] Preferably, the inner surface of the housing structure is further provided with a fixing ring coaxially opposite to the conduit. The fixing ring is fixedly connected to the inner wall of the housing structure through an elastic connector. A plastic positioning bolt passes through and is screwed onto the fixing ring. The cable passes through the fixing ring and is fixedly connected to the fixing ring through the plastic positioning bolt. A support ring is coaxially fixedly connected to the port of the conduit located on the inner wall of the housing structure. A ring pressure sensor is coaxially fixedly connected to the top of the support ring. A compression spring is provided between the ring pressure sensor and the fixing ring. The compression spring is sleeved on the outside of the cable and its two ends are fixedly connected to the ring pressure sensor and the end of the fixing ring, respectively. Each ring pressure sensor corresponding to the conduit is electrically connected to a controller. The controller is fixedly connected to the outer surface of the housing structure. An alarm electrically connected to the controller is also provided on the outer surface of the housing structure.

[0012] Preferably, it also includes a wireless signal transceiver device disposed on the outer surface of the shell structure, and the controller is connected to the mobile APP of the administrator through the wireless signal transceiver device.

[0013] Preferably, the moisture-proof mechanism includes a first ventilation pipe and a second ventilation pipe located at the top and bottom of the shell structure. A U-shaped pipe is also connected between the first and second ventilation pipes and located outside the shell structure. An exhaust fan is installed on the U-shaped pipe. The exhaust fan is used to circulate air from the shell structure through the first ventilation pipe, the U-shaped pipe, the second ventilation pipe, and the inner cavity of the shell structure. The inner wall of the U-shaped pipe connected to the output end of the exhaust fan is also staggered with multiple inclined metal settling plates. A funnel-shaped drain trough is also connected to the lower end of the U-shaped pipe. A drain pipe is provided at the bottom of the drain trough, and a valve is provided on the drain pipe. A humidity sensor electrically connected to the controller is provided on the inner wall of the shell structure. The humidity sensor and the exhaust fan are respectively electrically connected to the controller.

[0014] Preferably, the two ends of the U-shaped tube are rotatably connected to the ends of the first ventilation tube or the second ventilation tube via sealed bearings.

[0015] Preferably, the conical elastic tube includes a conical elastic metal tube skeleton located on the inner side and elastic rubber layers disposed on the inner and outer surfaces of the conical elastic metal tube skeleton.

[0016] This novel airport perimeter security low-voltage junction box structure, designed to resist electromagnetic interference, has the following beneficial effects: This new type of device can effectively improve the electromagnetic interference protection capability of the low-voltage junction box structure for airport perimeter security, as well as its dustproof and moisture-proof capabilities. In the event of close-range dragging, it can promptly alarm and stop the dragging, and notify management personnel for remote management, effectively preventing the risk of connectors inside the junction box falling off. Attached Figure Description

[0017] Figure 1 A front cross-sectional view of the main body of this novel low-voltage box; Figure 2 A front view structural diagram of the main body of this novel low-voltage box; Figure 3 A schematic diagram of the front view of this novel structure; Figure 4 A schematic diagram of the rear view structure of this new type of door.

[0018] 1: Low-voltage box body; 101: Insulation material layer; 102: First electromagnetic protection layer; 103: Second electromagnetic protection layer; 2: Cable sealing and anti-drag mechanism; 201: Cable conduit; 202: Elastic rubber tube; 203: Conical elastic tube; 204: Conical elastic metal tube skeleton; 3: U-shaped tube; 4: Sealed bearing; 5: First ventilation duct; 6: Humidity sensor; 7: Sleeve; 8: Second ventilation duct; 9: Exhaust fan; 10: Metal settling plate; 11: Drainage tank; 12: Drainage pipe; 13: Valve; 14: Annular groove; 15: Sealing ring; 16: Insert block; 17: Alarm; 18: Controller; 19: Door; 20: Threaded rod; 21: Handle; 22: Annular protrusion; 23: Slot; 24: Reinforcing plate; 25: Fixing ring; 26: Plastic positioning bolt; 27: Support ring; 28: Annular pressure sensor. Detailed Implementation

[0019] The following is a detailed description of the embodiments of the present invention in a step-by-step manner. This description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0020] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on this invention.

[0021] This invention relates to a novel structure for an airport perimeter security low-voltage junction box that resists electromagnetic interference. Figure 1-4 As shown, it includes a low-voltage box body 1. The structure of the low-voltage box body 1 is the same as that of the existing low-voltage box. This new invention does not improve its commonly used internal structure. The contents not mentioned are solved by the existing solution. The improvement is that: the low-voltage box body 1 is provided with an electromagnetic interference protection mechanism, and a cable sealing and anti-drag mechanism 2 is provided on one or both sides of the low-voltage box body 1. The periphery of the low-voltage box body 1 is also connected with a moisture-proof mechanism, and a door 19 is sealed and fixedly connected to the front end of the low-voltage box body 1.

[0022] In this embodiment, as Figure 1-4As shown, the main body 1 of the low-voltage box is a cubic shell structure with an open front end. The electromagnetic interference protection mechanism includes a first electromagnetic protection layer 102 and a second electromagnetic protection layer 103 respectively disposed on the inner and outer surfaces of the shell structure. An insulating material layer 101 is disposed between the first electromagnetic protection layer 102 and the second electromagnetic protection layer 103. The front port of the shell structure is provided with an annular groove 14, and a sealing ring 15 is disposed in the annular groove 14. The inner surface of the door 19 facing the annular groove 14 is provided with an annular protrusion 22. The annular protrusion 22 cooperates with the annular groove 14 and is used to press the sealing ring 15 tightly through a locking mechanism.

[0023] Specifically, the first electromagnetic shielding layer 102 is a 1.2mm thick galvanized steel plate layer, the second electromagnetic shielding layer 103 is a 1.2mm thick aluminum alloy layer, and the insulating material layer 101 is foam glass. With these features, the electromagnetic shielding effectiveness reaches 100dB@1GHz.

[0024] In this embodiment, as Figure 1-4 As shown, the front ends of the four corners of the inner side of the shell structure are fixedly connected to insert blocks 16. A sleeve 7 is provided on the front surface of the back plate of the shell structure along a direction perpendicular to the back plate. The sleeve 7 has internal threads. A threaded rod 20 is screwed into the middle of the door 19. The threaded rod 20 is threadedly connected to the sleeve 7 to form a locking mechanism. The four corners of the inner surface of the door 19 are respectively provided with slots 23 that mate with the insert blocks 16. One end of the threaded rod 20 penetrates the outer surface of the door 19 and is fixedly connected to a handle 21. The inner and outer surfaces of the door 19 are also provided with a first electromagnetic protection layer and a second electromagnetic protection layer, respectively. The inner surface of the door 19 is also provided with several stiffening plates 24 to prevent door deformation. Ordinary junction box doors are hinged, resulting in poor sealing and easy entry of moisture and dust. In this new type of door, during installation, four insert blocks 16 are inserted into four slots 23. After tightening, the annular convex ridge presses against the sealing ring. To further prevent the door from falling off, the threaded rod is tightened to lock the door at the front end of the shell structure.

[0025] In this embodiment, as Figure 1-4 As shown, the cable sealing and anti-drag mechanism 2 includes a cable conduit 201 fixedly connected to the outer wall of the housing structure and communicating with the interior of the housing structure, an elastic rubber tube 202 coaxially disposed inside the cable conduit 201, and a tapered elastic tube 203 fixedly connected between the cable conduit 201 and the elastic rubber tube 202. The large-diameter end of the tapered elastic tube 203 is sealed and fixedly connected to the inner wall of the cable conduit 201, and the small-diameter end is sealed and fixedly connected to the outer wall of the elastic rubber tube 202. The large-diameter end is located on the side away from the housing relative to the small-diameter end. The inner wall of the elastic rubber tube 202 is sealed to the cable passing through it (e.g., cable). Figure 1As shown in the figure (not marked), the surfaces are tightly fitted. When the cable is dragged outward, the cable drives the elastic rubber tube 202 to move outward, which in turn drives the tapered elastic tube 203 to be squeezed outward and deformed elastically, thereby achieving a stronger clamping force on the cable. On the one hand, this consumes dragging energy, and on the other hand, it prevents the cable connector in the junction box from falling off by making the connection with the cable more secure.

[0026] In this embodiment, as Figure 1-4 As shown, the inner surface of the housing structure is also provided with a fixing ring 25 coaxially opposite to the cable conduit 201. The fixing ring 25 is fixedly connected to the inner wall of the housing structure through an elastic connector (not shown in the figure). A plastic positioning bolt 26 passes through and is screwed onto the fixing ring 25. The cable passes through the fixing ring 25 and is fixedly connected to the fixing ring 25 through the plastic positioning bolt 26. A support ring 27 is coaxially fixedly connected to the port of the cable conduit 201 located on the inner wall of the housing structure. An annular pressure sensor 28 is coaxially fixedly connected to the top of the support ring 27. A compression spring (such as...) is provided between the annular pressure sensor 28 and the fixing ring 25. Figure 2 As shown in the figure (not marked), the compression spring is sleeved on the outside of the cable, and its two ends are fixedly connected to the ends of the annular pressure sensor 28 and the fixing ring 25, respectively. Each annular pressure sensor 28 corresponding to each cable conduit 201 is electrically connected to a controller 18. The controller 18 is fixedly connected to the outer surface of the housing structure, and the outer surface of the housing structure is also equipped with an alarm 17 electrically connected to the controller. When the cable is subjected to close-range dragging, the elastic connector deforms, the cable pulls the fixing ring to compress the compression spring, the annular pressure sensor receives the pressure signal and transmits the pressure signal to the controller. The controller activates the alarm based on the pressure signal to promptly stop the close-range dragging behavior.

[0027] In this embodiment, as Figure 1-4 As shown, it also includes a wireless signal transceiver (not shown) located on the outer surface of the housing structure. The controller is connected to the administrator's mobile app via the wireless transceiver. Administrators can receive alarm signals wirelessly in a timely manner, enabling prompt inspection and maintenance of any potential connector detachment risks. Since there are multiple cable conduits, each corresponding to a ring pressure sensor, the alarm signal can also specifically display information about the dragged cable, making inspection more convenient and allowing for quick location of the dragged cable.

[0028] In this embodiment, as Figure 1-4As shown, the moisture-proof mechanism includes a first ventilation pipe 5 and a second ventilation pipe 8 located at the top and bottom of the shell structure. A U-shaped pipe 3 is also connected between the first ventilation pipe 5 and the second ventilation pipe 8 and located on the outside of the shell structure. An exhaust fan 9 is provided on the U-shaped pipe 3. The exhaust fan 9 is used to circulate the air inside the shell structure from the first ventilation pipe 5 through the U-shaped pipe 3, the second ventilation pipe 8, and the inner cavity of the shell structure. The inner wall of the U-shaped pipe connected to the output end of the exhaust fan 9 is also staggered with multiple inclined metal settling plates 10. A funnel-shaped drain trough 11 is also connected to the lower end of the U-shaped pipe 3. A drain pipe 12 is provided at the bottom of the drain trough 11. A valve 13 is provided on the drain pipe 12. A humidity sensor 6 electrically connected to the controller 18 is provided on the inner wall of the shell structure. When the humidity sensor detects that the humidity inside the housing structure is greater than the set value, the exhaust fan starts, and the humid air enters the U-shaped pipe, condenses on the surface of the metal settling plate (the metal settling plate should not obstruct the flow of condensate into the drain tank), and finally flows into the drain tank 11, which can be discharged by opening the valve 13; the humidity sensor and the exhaust fan are electrically connected to the controller. At the same time, the manager can view the relevant dehumidification information through a mobile APP. After a certain period of time, the valve can be manually opened to discharge the condensate, or the valve can be set as a solenoid valve, which can be automatically opened by the controller within a fixed period of time to discharge the condensate.

[0029] In this embodiment, as Figure 1-4 As shown, the two ends of the U-shaped tube 3 are rotatably connected to the ends of the first ventilation tube 5 or the second ventilation tube 8 via sealed bearings 4. The U-shaped tube 3 can rotate within a certain range to avoid interference with other objects at the junction box installation location. Simultaneously, the U-shaped tube can also serve as a handle for the junction box, facilitating its movement.

[0030] In this embodiment, as Figure 1-4 As shown, the conical elastic tube 203 includes a conical elastic metal tube skeleton 204 located on the inner side and elastic rubber layers disposed on the inner and outer surfaces of the conical elastic metal tube skeleton 204.

[0031] Through the above-mentioned design, this new type of device can effectively improve the electromagnetic interference protection capability of the low-voltage junction box structure for airport perimeter security, as well as enhance its dustproof and moisture-proof capabilities. In the event of close-range dragging, it can promptly trigger an alarm to stop the dragging and notify management personnel for remote management, effectively preventing the risk of connectors inside the junction box falling off.

Claims

1. A structure for an airport perimeter security low-voltage junction box resistant to electromagnetic interference, characterized in that: The device includes a low-voltage box body, which is equipped with an electromagnetic interference protection mechanism. One or both sides of the low-voltage box body are equipped with a cable sealing and anti-drag mechanism. The periphery of the low-voltage box body is also connected with a moisture-proof mechanism. The front end of the low-voltage box body is sealed and fixedly connected with a door.

2. The structure of an airport perimeter security low-voltage junction box for electromagnetic interference resistance as described in claim 1, characterized in that: The low-voltage box body is a cubic shell structure with an open front end. The electromagnetic interference protection mechanism includes a first electromagnetic protection layer and a second electromagnetic protection layer respectively disposed on the inner and outer surfaces of the shell structure. An insulating material layer is disposed between the first electromagnetic protection layer and the second electromagnetic protection layer. The front port of the shell structure is provided with an annular groove, and a sealing ring is disposed in the annular groove. The inner surface of the door facing the annular groove is provided with an annular protrusion. The annular protrusion cooperates with the annular groove and is used to press the sealing ring tightly through a locking mechanism.

3. The structure of an airport perimeter security low-voltage junction box for electromagnetic interference resistance as described in claim 2, characterized in that: The first electromagnetic shielding layer is a galvanized steel plate layer, the second electromagnetic shielding layer is an aluminum alloy material layer, and the insulating material layer is foam glass.

4. The structure of an airport perimeter security low-voltage junction box for electromagnetic interference resistance as described in claim 3, characterized in that: The front ends of the four corners of the inner side of the shell structure are fixedly connected with insert blocks. The front surface of the back plate of the shell structure is provided with a sleeve along the direction perpendicular to the back plate. The sleeve is provided with internal threads. The middle of the door is screwed with a threaded rod. The threaded rod is threadedly connected to the sleeve to form a locking mechanism. The four corners of the inner surface of the door are respectively provided with slots that cooperate with the insert blocks. One end of the threaded rod passes through the outer surface of the door and is fixedly connected with a handle. The inner and outer surfaces of the door are also provided with a first electromagnetic protection layer and a second electromagnetic protection layer, respectively. The inner surface of the door is also provided with several stiffening plates to prevent the door from deforming.

5. The structure of an airport perimeter security low-voltage junction box for electromagnetic interference resistance as described in claim 4, characterized in that: The cable sealing and anti-drag mechanism includes a cable conduit fixedly connected to the outer wall of the housing structure and communicating with the interior of the housing structure, an elastic rubber tube coaxially disposed inside the cable conduit, and a tapered elastic tube fixedly connected between the cable conduit and the elastic rubber tube. The large-diameter end of the tapered elastic tube is sealed and fixedly connected to the inner wall of the cable conduit, and the small-diameter end is sealed and fixedly connected to the outer wall of the elastic rubber tube. The large-diameter end is located on the side away from the housing relative to the small-diameter end, and the inner wall of the elastic rubber tube is tightly fitted to the surface of the cable passing through it.

6. The structure of an airport perimeter security low-voltage junction box for electromagnetic interference resistance as described in claim 5, characterized in that: The inner surface of the housing structure is also provided with a fixing ring coaxially opposite to the cable conduit. The fixing ring is fixedly connected to the inner wall of the housing structure through an elastic connector. A plastic positioning bolt passes through and is screwed onto the fixing ring. The cable passes through the fixing ring and is fixedly connected to the fixing ring through the plastic positioning bolt. A support ring is coaxially fixedly connected to the port of the cable conduit located on the inner wall of the housing structure. A ring pressure sensor is coaxially fixedly connected to the top of the support ring. A compression spring is provided between the ring pressure sensor and the fixing ring. The compression spring is sleeved on the outside of the cable and its two ends are fixedly connected to the ring pressure sensor and the end of the fixing ring, respectively. Each ring pressure sensor corresponding to the cable conduit is electrically connected to a controller. The controller is fixedly connected to the outer surface of the housing structure. An alarm electrically connected to the controller is also provided on the outer surface of the housing structure.

7. The structure of an airport perimeter security low-voltage junction box for electromagnetic interference resistance as described in claim 6, characterized in that: It also includes a wireless signal transceiver device located on the outer surface of the shell structure, and the controller is connected to the mobile APP of the administrator through the wireless signal transceiver device.

8. The structure of an airport perimeter security low-voltage junction box for electromagnetic interference resistance as described in claim 7, characterized in that: The moisture-proof mechanism includes a first ventilation pipe and a second ventilation pipe located at the top and bottom of the shell structure. A U-shaped pipe is also connected between the first and second ventilation pipes and located outside the shell structure. An exhaust fan is installed on the U-shaped pipe. The exhaust fan is used to circulate air from the shell structure through the first ventilation pipe, the U-shaped pipe, the second ventilation pipe, and the inner cavity of the shell structure. The inner wall of the U-shaped pipe connected to the output end of the exhaust fan is also staggered with multiple inclined metal settling plates. A funnel-shaped drain trough is also connected to the lower end of the U-shaped pipe. A drain pipe is provided at the bottom of the drain trough, and a valve is provided on the drain pipe. A humidity sensor electrically connected to the controller is provided on the inner wall of the shell structure. The humidity sensor and the exhaust fan are respectively electrically connected to the controller.

9. The structure of an airport perimeter security low-voltage junction box for electromagnetic interference resistance as described in claim 8, characterized in that: The two ends of the U-shaped tube are rotatably connected to the ends of the first ventilation tube or the second ventilation tube via sealed bearings.

10. The structure of an airport perimeter security low-voltage junction box for electromagnetic interference resistance as described in claim 9, characterized in that: The conical elastic tube includes a conical elastic metal tube skeleton located on the inner side and an elastic rubber layer disposed on the inner and outer surfaces of the conical elastic metal tube skeleton.

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