Marine EMP electromagnetic isolation device

Abstract

The utility model discloses a marine EMP electromagnetic isolation device which comprises an electromagnetic isolation box and a printed circuit board arranged in the electromagnetic isolation box and used for shielding electromagnetic waves, the electromagnetic isolation box comprises a hollow metal box body with an opening at the top and a metal box cover detachably installed at the opening of the metal box body, the metal box body and the metal box cover are enclosed to form an electromagnetic isolation cavity for accommodating a printed circuit board; a first quick-plug connector and a second quick-plug connector are arranged at the two ends, away from each other, of the electromagnetic isolation box in a penetrating mode respectively, the outer butt joint end of the first quick-plug connector and the outer butt joint end of the second quick-plug connector are both located outside the electromagnetic isolation box, and the inner connecting end of the first quick-plug connector and the inner connecting end of the second quick-plug connector are both electrically connected with the printed circuit board. The beneficial effects of the utility model are that: do not need to reserve installation space, occupy small space, do not need to install with electronic equipment synchronously, can be installed in each equipment input / output interface or embedded in a deck or a cabinet according to the actual situation, and have strong applicability.

Description

Technical Field

[0001] This application belongs to the field of electromagnetic wave protection technology, specifically relating to a marine EMP electromagnetic isolation device for resisting electromagnetic interference, and in particular an EMP electromagnetic isolation device for electromagnetic shielding of electronic equipment on ships. Background Technology

[0002] An electromagnetic pulse (EMP) is a high-intensity electromagnetic wave, typically caused by natural or man-made factors such as nuclear explosions, lightning strikes, and solar flares. EMP is a powerful form of electromagnetic interference that can damage or even completely disable electronic equipment and power systems. EMP can generate strong electromagnetic interference (EMI) within electronic equipment, leading to malfunctions, data loss, and even damage or failure. While electronic equipment is typically protected by a protective enclosure, when the EMP is strong enough, some of its energy may penetrate the enclosure and cause interference or damage to the internal electronic components. However, current practices for shielding and protecting communication systems on ships involve two main approaches: First, electronic equipment is typically installed in a dedicated shielded room, as disclosed in Chinese Patent 201510429269.6. This shielded room includes a shell with electromagnetic shielding doors on its side walls. Using this shielded room ensures that the electronic equipment inside is protected from external electromagnetic interference and prevents electromagnetic leakage from harming the health of the crew. However, this method requires construction and layout during shipbuilding, occupies a large space, and has limited use. Furthermore, the electronic equipment inside the shielded room can still generate interference. Second, protective equipment can be placed outside the electronic equipment, as disclosed in Chinese Patent 202311273083.7, which discloses an electromagnetic pulse interception device and its interception method. This device effectively protects the electronic equipment terminal from external EMP interference through a metal casing assembly to ensure its normal operation. However, this method also has problems: circuit board disassembly and assembly are inconvenient, easily leading to poor contact between the circuit board and connectors. Moreover, it needs to be installed synchronously with the electronic equipment before use, and replacement is inconvenient if the protective equipment malfunctions, affecting its use. Utility Model Content

[0003] In view of the shortcomings of the prior art described above, the purpose of this application is to provide a marine EMP electromagnetic isolation device to solve the problems of large space occupation, need to be installed synchronously with electronic equipment, inconvenience of circuit board disassembly and assembly, poor contact between circuit board and connector, and inconvenience of maintenance and replacement.

[0004] To solve the above problems, the technical solution adopted in this application is:

[0005] A marine EMP electromagnetic isolation device includes an electromagnetic isolation box and a printed circuit board disposed within the electromagnetic isolation box for shielding electromagnetic waves. The electromagnetic isolation box includes a metal box body with an open top and a hollow interior, and a metal box cover detachably installed at the opening of the metal box body. The metal box body and the metal box cover enclose an electromagnetic isolation cavity for accommodating the printed circuit board. Two opposite ends of the electromagnetic isolation box are respectively provided with a first quick-connect connector and a second quick-connect connector for interfacing with external devices. The outer terminals of the first quick-connect connector and the second quick-connect connector are both located outside the electromagnetic isolation box, and the inner terminals of the first quick-connect connector and the second quick-connect connector are both electrically connected to the printed circuit board.

[0006] As a preferred embodiment of this utility model, the metal box is a hollow cuboid box. The two far ends of the metal box are respectively provided with plug mounting holes for fixing the first quick connector and the second quick connector. The two opposite inner sidewalls of the metal box are provided with positioning planes parallel to the inner bottom surface of the metal box for supporting the printed circuit board. A main positioning post is provided between the top edge of the metal box and the inner bottom surface of the metal box. An auxiliary positioning post is provided between the positioning plane and the inner bottom surface of the metal box. The main positioning post is provided with a main positioning hole extending along the length direction of the main positioning post. Each of the auxiliary positioning posts is provided with an auxiliary positioning hole extending along the length direction of the auxiliary positioning post.

[0007] As a preferred embodiment of this utility model, the two opposite ends of the metal box body along its length are respectively provided with insertion interfaces for inserting the first quick-connect connector and the second quick-connect connector.

[0008] As a preferred embodiment of this utility model, both the main positioning post and the auxiliary positioning post are semi-cylinders.

[0009] As a preferred embodiment of this utility model, the edge of the metal box cover is provided with several positioning mounting holes that correspond one-to-one with the main positioning hole.

[0010] As a preferred embodiment of this utility model, the inner surface of the metal box cover facing the printed circuit board is provided with a plurality of limiting protrusions along the circumferential direction, and the top of the limiting protrusions is curved.

[0011] As a preferred embodiment of this invention, the printed circuit board is installed in the electromagnetic isolation box in a pluggable manner.

[0012] As a preferred embodiment of this utility model, the printed circuit board is provided with a first conductive socket for engaging with a first quick connector, a second conductive socket for engaging with a second quick connector, and mounting holes corresponding one-to-one with the positioning mounting holes. The edge of the printed circuit board overlaps on the positioning plane. The first conductive socket engages with the pin of the first quick connector, and the second conductive socket engages with the pin of the second quick connector.

[0013] As a preferred embodiment of this invention, the printed circuit board is further provided with a clearance groove adapted to the main positioning post.

[0014] As a preferred embodiment of this invention, an annular anti-detachment groove is provided on the outer wall of the first quick-connect connector.

[0015] As a preferred embodiment of this invention, the outer surface of the electromagnetic isolation box is provided with an anti-corrosion coating.

[0016] Compared with the prior art, the beneficial effects of this application are:

[0017] 1. No installation space is required, it occupies little space, and it does not need to be installed simultaneously with electronic equipment, making it suitable for different working conditions;

[0018] 2. Equipped with multi-level protection, providing electromagnetic isolation that can effectively suppress the maximum pulse amplitude of 100A and the maximum surge amplitude of 500A, ensuring the normal and safe use of electronic information equipment in complex electromagnetic environments;

[0019] 3. The electromagnetic isolation box is coated with an anti-corrosion coating, which improves the device's corrosion resistance.

[0020] 4. The entire device is small in size and can be installed at the input / output interfaces of various devices or embedded in decks or cabinets, making it highly adaptable.

[0021] 5. Standardized interfaces for easy installation;

[0022] 6. The circuit board and connectors are easy to replace and disassemble, with good contact, and do not affect the original signal transmission characteristics. Attached Figure Description

[0023] Figure 1 This is a structural diagram of a marine EMP electromagnetic isolation device according to one embodiment of this application.

[0024] Figure 2 This is an internal schematic diagram of the marine EMP electromagnetic isolation device of this application.

[0025] Figure 3 This is a structural diagram of the metal casing of the electromagnetic isolation box of this application.

[0026] Figure 4 This is a structural diagram of the metal cover of the electromagnetic isolation box of this application.

[0027] Figure 5 This is an exploded view of this application.

[0028] Figure 6 This is an installation diagram for this application.

[0029] In the attached image:

[0030] 1-Electromagnetic isolation box; 11-Metal box body; 110-Box edge; 111-Positioning plane; 112-Main positioning post; 113-Auxiliary positioning post; 114-Auxiliary positioning hole; 115-Main positioning hole; 116-Mounting platform; 117-Insert interface; 12-Metal box cover; 121-Positioning mounting hole; 122-Limiting protrusion;

[0031] 2-Printed circuit board; 21-First conductive socket; 22-Second conductive socket; 23-Mounting hole; 24-Clearing groove;

[0032] 3-First quick-connect fitting; 31-Annular anti-disengagement groove;

[0033] 4-Second quick-connect connector. Detailed Implementation

[0034] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application.

[0035] It should be noted that the process equipment or apparatus not specifically mentioned in the following embodiments are all conventional equipment or apparatus in the art.

[0036] Furthermore, it should be understood that the existence of other method steps before or after the combined steps, or the insertion of other method steps between these explicitly mentioned steps, does not preclude the existence of other method steps before or after the combined steps, or the insertion of other method steps between these explicitly mentioned steps, unless otherwise stated. It should also be understood that the combined connection relationship between one or more devices / apparatus mentioned in this application does not preclude the existence of other devices / apparatus before or after the combined devices / apparatus, or the insertion of other devices / apparatus between these explicitly mentioned devices / apparatus, unless otherwise stated. Moreover, unless otherwise stated, the numbering of each method step is merely a convenient tool for identifying each method step, and not for limiting the order of the method steps or limiting the scope of implementation of this application. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of implementation of this application.

[0037] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0038] In the description of this application, it should be understood that the terms "upper," "lower," "left," "right," "inner," "outer," "axial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0039] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0041] The present application will be further described below with reference to specific embodiments, but the scope of protection of the present application is not limited thereto.

[0042] The present invention discloses a marine EMP electromagnetic isolation device, comprising an electromagnetic isolation box 1 and a printed circuit board 2 disposed within the electromagnetic isolation box 1 for shielding electromagnetic waves. The electromagnetic isolation box 1 includes a metal box body 11 with an open top and a hollow interior, and a metal box cover 12 detachably installed at the opening of the metal box body 11. The metal box body 11 and the metal box cover 12 enclose an electromagnetic isolation cavity for accommodating the printed circuit board 2. A first quick connector 3 and a second quick connector 4 for interfacing with external equipment are respectively provided at two far apart ends of the electromagnetic isolation box 1. The outer terminals of the first quick connector 3 and the second quick connector 4 are located outside the electromagnetic isolation box 1, and the inner terminals of the first quick connector 3 and the second quick connector 4 are electrically connected to the printed circuit board 2.

[0043] In some embodiments of this utility model, the metal box 11 is a hollow cuboid box. The two far apart ends of the metal box 11 are respectively provided with plug mounting holes for fixing the first quick connector 3 and the second quick connector 4. The two opposite inner sidewalls of the metal box 11 are provided with positioning planes 111 parallel to the inner bottom surface of the metal box 11 for supporting the printed circuit board 2. The box edge 110 of the metal box 11 is provided with a main positioning post 112 between the box edge 110 and the inner bottom surface of the metal box 11. The positioning plane 111 is provided with an auxiliary positioning post 113 between the positioning plane 111 and the inner bottom surface of the metal box 11. The main positioning post 112 is provided with a main positioning hole 115 extending along the length direction of the main positioning post 112. The auxiliary positioning post 113 is provided with an auxiliary positioning hole 114 extending along the length direction of the auxiliary positioning post 113.

[0044] In some embodiments of this utility model, the positioning plane 111 of the metal box 11 has a consistent height, which can support the two edges of the printed circuit board 2 along its length, while ensuring that the printed circuit board 2 is always parallel to the inner bottom surface of the metal box 11.

[0045] In some embodiments of this utility model, the main positioning post 112 and the auxiliary positioning post 113 are both semi-cylinders.

[0046] In some embodiments of this utility model, the bottom of the metal box 11 is also provided with a mounting platform 116 for mounting a fixing bracket, which is used to support the bottom of the printed circuit board.

[0047] In some embodiments of this utility model, the metal box 11 is provided with insertion interfaces 117 for inserting the first quick connector and the second quick connector at its two opposite ends along the length direction.

[0048] In some embodiments of this utility model, the edge of the metal box cover 12 is provided with several positioning mounting holes 121 that correspond one-to-one with the main positioning hole 115.

[0049] In some embodiments of this utility model, the inner surface of the metal box cover 12 facing the printed circuit board 2 is provided with a plurality of limiting protrusions 122 along the circumferential direction.

[0050] In some embodiments of this utility model, the printed circuit board 2 is installed in the electromagnetic isolation box 1 in a pluggable manner.

[0051] In some embodiments of this utility model, the printed circuit board 2 is provided with a TVS diode, a series pulse resistor, a metal oxide varistor (MOV), and a transient blocking unit (TBU).

[0052] In some embodiments of this utility model, the printed circuit board 2 is provided with a first conductive socket 21 for insertion and cooperation with the first quick connector 3, a second conductive socket 22 for insertion and cooperation with the second quick connector 4, and mounting holes 23 corresponding one-to-one with the positioning mounting holes 121. The edge of the printed circuit board overlaps on the positioning plane 111. The first conductive socket 21 is inserted and cooperated with the pin of the first quick connector 3, and the second conductive socket 22 is inserted and cooperated with the pin of the second quick connector 4.

[0053] In some embodiments of this utility model, the printed circuit board 2 is further provided with a clearance groove 24 adapted to the main positioning post 112.

[0054] In some embodiments of this utility model, an annular anti-detachment groove 31 is provided on the outer wall of the first quick-connect connector 3.

[0055] In some embodiments of this utility model, the outer surface of the electromagnetic isolation box 1 is provided with an anti-corrosion coating.

[0056] The marine EMP electromagnetic isolation device protected by this utility model can be installed at the input / output interface of the ship or embedded in the hull, deck, cabinet, or table, and connected between the equipment inside and outside the cabin via communication cables (such as RS485 twisted pair). Specifically, the total weight of the marine EMP electromagnetic isolation device described in this utility model is between 350g and 500g. To ensure strength, the recommended installation torque is 0.25-0.35Nm. The electromagnetic isolation box is a die-cast part made of aluminum alloy, with dimensions of 30mm*30mm*100mm. The interior of the electromagnetic isolation box is hollow, and the printed circuit board is fixed inside the electromagnetic isolation box by an inverted method. The printed circuit board can be connected to the first quick-connect connector 3 and the second quick-connect connector 4 by welding or by screws to ensure tight contact between the circuit board and the first quick-connect connector 3 and the second quick-connect connector 4, maintaining good conductivity. One end of the first quick-connect connector 3 and the second quick-connect connector 4 is inserted into the printed circuit board, and the other end extends out of the electromagnetic isolation box to be inserted into the equipment outside the cabin to achieve electrical conduction. The pulse amplitude is 100A (for a short pulse with a rise time of 20ns and a duration of 550ns); the surge amplitude is 500A (for an 8 / 20us surge as defined in the IEC61000-4-5 standard); the residual capacity under this short pulse is 1A; the maximum operating voltage is ±6V; and the maximum transmission rate is 1Mbps, which can ensure the normal and safe use of electronic information equipment in complex electromagnetic environments.

[0057] The above embodiments are for illustrating the implementation schemes disclosed in this application and should not be construed as limiting this application. Furthermore, various modifications listed herein, as well as variations in methods and compositions of the utility model, will be apparent to those skilled in the art without departing from the scope and spirit of this application. Although this application has been specifically described in conjunction with various specific preferred embodiments, it should be understood that this application should not be limited to these specific embodiments. In fact, various modifications as described above that are obvious to those skilled in the art to obtain the utility model should be included within the scope of this application.

Claims

1. A marine EMP electromagnetic isolation device, characterized in that, The device includes an electromagnetic isolation box (1) and a printed circuit board (2) disposed inside the electromagnetic isolation box (1) for shielding electromagnetic waves. The electromagnetic isolation box (1) includes a metal box body (11) with an open top and a hollow interior, and a metal box cover (12) detachably installed at the opening of the metal box body (11). The metal box body (11) and the metal box cover (12) enclose an electromagnetic isolation cavity for accommodating the printed circuit board (2). Two quick connectors (3) and (4) for docking with external devices are respectively provided at the two far apart ends of the electromagnetic isolation box (1). The outer docking ends of the first quick connector (3) and the second quick connector (4) are located outside the electromagnetic isolation box (1), and the inner connecting ends of the first quick connector (3) and the second quick connector (4) are electrically connected to the printed circuit board (2).

2. The marine EMP electromagnetic isolation device according to claim 1, characterized in that: The metal box (11) is a hollow cuboid box. The two far ends of the metal box (11) are respectively provided with plug mounting holes for fixing the first quick connector (3) and the second quick connector (4). The two opposite inner sidewalls of the metal box (11) are provided with positioning planes (111) parallel to the inner bottom surface of the metal box (11) for supporting the printed circuit board (2). The box edge (110) of the metal box (11) is provided with a main positioning post (112) between the inner bottom surface of the metal box (11) and an auxiliary positioning post (113) between the positioning plane (111) and the inner bottom surface of the metal box (11). The main positioning post (112) is provided with a main positioning hole (115) extending along the length direction of the main positioning post (112). The auxiliary positioning post (113) is provided with an auxiliary positioning hole (114) extending along the length direction of the auxiliary positioning post (113).

3. A marine EMP electromagnetic isolation device according to claim 2, characterized in that: Both the main positioning post (112) and the auxiliary positioning post (113) are semi-cylinders.

4. A marine EMP electromagnetic isolation device according to claim 2, characterized in that: The edge of the metal box cover (12) is provided with several positioning mounting holes (121) that correspond one-to-one with the main positioning hole (115).

5. A marine EMP electromagnetic isolation device according to claim 2, characterized in that: The inner surface of the metal box cover (12) facing the printed circuit board (2) is provided with several limiting protrusions along the circumference, and the top of the limiting protrusions is curved.

6. A marine EMP electromagnetic isolation device according to claim 1, characterized in that: The printed circuit board (2) is installed in the electromagnetic isolation box (1) in a pluggable manner.

7. A marine EMP electromagnetic isolation device according to claim 4, characterized in that: The printed circuit board (2) is provided with a first conductive socket (21) for insertion and cooperation with the first quick connector (3), a second conductive socket (22) for insertion and cooperation with the second quick connector (4), and mounting holes (23) corresponding one-to-one with the positioning mounting hole (121). The edge of the printed circuit board overlaps on the positioning plane (111). The first conductive socket (21) is inserted and cooperated with the pin of the first quick connector (3), and the second conductive socket (22) is inserted and cooperated with the pin of the second quick connector (4).

8. A marine EMP electromagnetic isolation device according to claim 6, characterized in that: The printed circuit board (2) is also provided with a clearance groove (24) adapted to the main positioning post (112).

9. A marine EMP electromagnetic isolation device according to claim 1, characterized in that: The outer wall of the first quick-connect connector (3) is provided with an annular anti-detachment groove (31).

10. A marine EMP electromagnetic isolation device according to claim 1, characterized in that: The outer surface of the electromagnetic isolation box (1) is provided with an anti-corrosion coating.

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