Split type cable penetration structure and electromagnetic shielding device

Abstract

The invention relates to the field of electromagnetic shielding of electrical equipment, in particular to a split type cable penetrating structure and an electromagnetic shielding device. A split type cable penetrating structure comprises at least three sections of cable penetrating rings which are arranged in a segmented mode, made of conductors and used for allowing cables to penetrate through, at least one cable penetrating ring is used for being fixed to a cable through hole of a cabin wall to form a fixed penetrating ring, and the other cable penetrating rings form movable penetrating rings. Each movable penetrating ring comprises at least two splicing plates which are spliced in the circumferential direction, the end portion of each end of the fixed penetrating ring is provided with one movable penetrating ring, and due to the fact that the movable penetrating rings are formed by splicing in the circumferential direction, the movable penetrating rings can be opened to facilitate cable stripping operation. Therefore, the problems that the cable penetration structure in the prior art is an integral structure, the middle space is narrow, and the cable stripping operation is inconvenient are solved.

Description

Technical Field

[0001] The invention relates to the field of electromagnetic shielding of electrical equipment, and in particular to a split type cable penetration structure and an electromagnetic shielding device. Background Art

[0002] In ship construction, multiple independent cabins are built, some of which are used to place high-precision equipment, and others are used to place high-power equipment. These high-power equipment will generate strong electromagnetic fields when working, thus causing electromagnetic interference to surrounding components. Generally speaking, since each cabin is made of metal and is closed, a good electromagnetic shielding will be formed in a closed environment, so that there will be no electromagnetic interference between the cabins. That is, as long as the high-precision equipment and the high-power equipment are placed separately in different cabins, the electromagnetic field generated by the high-power equipment will not affect the high-precision equipment.

[0003] However, the layout of cables needs to pass through the bulkhead of the cabin, which necessitates opening a cable hole in the bulkhead. The bulkhead after the hole is opened cannot achieve good electromagnetic shielding. Electromagnetic wires can pass through the cable hole and then propagate between different cabins, causing electromagnetic interference. Therefore, in ship construction, especially in cabins storing high-precision equipment, electromagnetic shielding at the cable hole on the bulkhead must be considered during construction.

[0004] The existing electromagnetic shielding processing technology is to fix a conductive cylindrical cable tube (i.e., a cable penetration structure) in the cable via hole of the bulkhead. The cable tube is made of metal, and the insulation of the cable is stripped off to expose the cable shielding layer inside the cable. Finally, conductive silicone is filled between the cable shielding layer and the cable tube, so that the space between the cable shielding layer and the cable via hole is filled with a conductive medium to achieve electrical connection between the cable shielding layer and the bulkhead. In this way, for the propagation of electromagnetic waves, the cable via hole on the bulkhead has been filled, and electromagnetic interference will no longer flow through the cable via holes.

[0005] However, in the prior art, the electromagnetic shielding process requires the cable to be stripped to expose the cable shielding layer. At the same time, the stripped section of the cable must be located in the cable penetration structure and be roughly flush. The space in the cable penetration structure is small and there are many cables in the cable penetration structure, which makes the cable stripping operation difficult. Summary of the invention

[0006] In view of this, the present invention provides a split cable penetration structure to solve the problem in the prior art that the cable penetration structure is an integral structure with a narrow middle space, which makes it inconvenient to perform cable stripping operations; the purpose of the present invention is also to provide an electromagnetic shielding device to solve the above-mentioned technical problems.

[0007] A split cable penetration structure comprises at least three cable threading rings which are arranged in sections and made of conductors for passing cables, wherein at least one cable threading ring is used to be fixed at a cable through hole of a bulkhead to form a fixed threading ring, and the other cable threading rings form movable threading rings, each movable threading ring comprises at least two splicing plates spliced ​​along the circumferential direction, a movable threading ring is arranged at the end of each end of the fixed threading ring, and two adjacent cable threading rings are fixedly connected when in use.

[0008] Furthermore, one fixed wearing ring is provided, and two movable wearing rings are provided, and first mounting parts for mounting the movable wearing ring are respectively provided at both ends of the fixed wearing ring, and a second mounting part for cooperating with the first mounting part to complete the installation is provided at one end of the movable wearing ring close to the fixed wearing ring.

[0009] Furthermore, the first mounting portion is a first bolt mounting hole arranged on the end surface of the fixed penetration ring.

[0010] Furthermore, the first bolt mounting hole penetrates the fixed mounting ring along the length direction of the fixed mounting ring.

[0011] Furthermore, each movable wearing ring includes two splicing plates, the splicing plates are U-shaped, and the two splicing plates are abutted and connected.

[0012] Furthermore, a flange edge is provided at one end of the splicing plate in the length direction close to the fixed wearing ring, and the second mounting portion is a second bolt mounting hole provided on the flange edge of the splicing plate.

[0013] Furthermore, the splicing plate includes a bottom plate and side plates on both sides, and an end of the side plate away from the bottom plate is provided with an outwardly bent flange, and the flange is provided with a third bolt mounting hole that matches the splicing plate.

[0014] The beneficial effects of the split cable penetration structure of the present invention are as follows: by setting at least three sections of cable threading rings, it is convenient to thread the cable, and since it is divided into multiple sections, the size of each section can be reduced accordingly; two adjacent cable threading rings are fixedly connected when in use, ensuring that they can be extended to a set size when in use; wherein at least one cable threading ring is fixed to the cable through hole of the bulkhead to form a fixed threading ring, and the fixed threading ring also forms the installation basis of the split cable penetration structure, and the other cable threading rings form movable threading rings, and since the movable threading rings are spliced ​​along the circumferential direction, the movable threading rings can be opened to facilitate the cable stripping operation, thereby solving the problem in the prior art that the cable penetration structure is an integral structure with a narrow middle space, which is inconvenient for cable stripping operations.

[0015] An electromagnetic shielding device comprises a cable penetration structure and a cable inserted in the cable penetration structure, wherein the cable comprises a stripping section located inside the cable penetration structure and exposing a cable shielding layer, wherein a conductive medium is filled between the cable shielding layer of the stripping section and the cable penetration structure, and the cable penetration structure comprises at least three cable insertion rings which are arranged in sections and made of conductors for the cable to pass through, wherein at least one cable insertion ring is used to be fixed at a cable through hole of a bulkhead to form a fixed insertion ring, and the other cable insertion rings form movable insertion rings, each movable insertion ring comprises at least two splicing plates spliced ​​along the circumferential direction, and a movable insertion ring is provided at the end of each end of the fixed insertion ring, and two adjacent cable insertion rings are fixedly connected when in use.

[0016] Furthermore, one fixed wearing ring is provided, and two movable wearing rings are provided, and first mounting parts for mounting the movable wearing ring are respectively provided at both ends of the fixed wearing ring, and a second mounting part for cooperating with the first mounting part to complete the installation is provided at one end of the movable wearing ring close to the fixed wearing ring.

[0017] Furthermore, the first mounting portion is a first bolt mounting hole arranged on the end surface of the fixed penetration ring.

[0018] Furthermore, the first bolt mounting hole penetrates the fixed mounting ring along the length direction of the fixed mounting ring.

[0019] Furthermore, each movable wearing ring includes two splicing plates, the splicing plates are U-shaped, and the two splicing plates are abutted and connected.

[0020] Furthermore, a flange edge is provided at one end of the splicing plate in the length direction close to the fixed wearing ring, and the second mounting portion is a second bolt mounting hole provided on the flange edge of the splicing plate.

[0021] Furthermore, the splicing plate includes a bottom plate and side plates on both sides, and an end of the side plate away from the bottom plate is provided with an outwardly bent flange, and the flange is provided with a third bolt mounting hole that matches the splicing plate.

[0022] Furthermore, a grounding wire is connected between the movable wearing ring and the cable shielding layer of the cable to make the two have the same potential.

[0023] Furthermore, the cable threading ring is a metal threading ring made of stainless steel, and the outer peripheral surface of the fixed threading ring is used for welding connection with the cable through hole of the bulkhead.

[0024] The beneficial effects of the electromagnetic shielding device in the present invention are as follows: by setting a cable penetration structure and the cables in the cable penetration structure, it is convenient to connect the cables between different cabins; by setting a stripping section and filling a conductive medium between the cable shielding layer of the stripping section and the cable penetration structure, it is convenient to re-seal the cable through-holes on the bulkhead; by setting at least three sections of cable threading rings, it is convenient to thread the cables, and since it is divided into multiple sections, the size of each section can be reduced accordingly; two adjacent cable threading rings are fixedly connected when used to ensure that they can be extended to a set size when used; wherein at least one cable threading ring is fixed at the cable through-hole of the bulkhead to form a fixed threading ring, and the fixed threading ring also constitutes the installation basis of the split cable penetration structure, and the other cable threading rings constitute movable threading rings. Since the movable threading rings are spliced ​​along the circumferential direction, the movable threading rings can be opened to facilitate the cable stripping operation, thereby solving the problem in the prior art that the cable penetration structure is an integral structure with a narrow middle space, which is inconvenient for cable stripping operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. 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 creative work.

[0026] Figure 1 is a schematic structural diagram of an embodiment of an electromagnetic shielding device in the present invention;

[0027] Figure 2 is a schematic structural diagram of a splicing plate of an embodiment of an electromagnetic shielding device in the present invention;

[0028] Figure 3 It is a side view of the fixed wearing ring and the cable in the embodiment of the electromagnetic shielding device of the present invention;

[0029] Figure 4 It is a top view of the cooperation between the fixed wearing ring and the cable of the embodiment of the electromagnetic shielding device of the present invention;

[0030] Figure 5 It is a schematic structural diagram of a cable in an embodiment of the electromagnetic shielding device of the present invention.

[0031] The meanings of the numbers in the figure are:

[0032] 1. Cable; 11. Cable shielding layer; 12. Grounding wire; 121. Grounding connection ring; 2. Fixed mounting ring; 21. First bolt mounting hole; 31. Splicing plate; 311. Bottom plate; 312. Side plate; 313. Flange; 314. Flanged edge; 32. Second bolt mounting hole; 33. Third bolt mounting hole. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described below by the specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0034] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. The singular forms of "a", "said" and "the" used in this disclosure and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0035] It should be understood that although the terms first, second, third, etc. may be used in the present disclosure to describe various information, such information should not be limited to these terms and should not be understood as indicating or implying relative importance. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0036] In the description of the present invention, it is necessary to understand that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0038] In the following description, the suffixes such as "module", "component" or "unit" used to represent elements are only used to facilitate the description of the present invention, and have no specific meanings. Therefore, "module" and "component" can be used interchangeably.

[0039] In order to better understand the technical solution of the electromagnetic shielding device in the present invention, the present invention is described in detail below with reference to the accompanying drawings.

[0040] Reference Figure 1 , which is a schematic diagram of the structure of the electromagnetic shielding device in the present invention. The extension direction of the cable 1 is defined as the length direction. The electromagnetic shielding device includes a cable penetration structure and a cable 1 installed in the cable penetration structure. After the cable through hole is opened on the bulkhead, the cable through hole itself can allow electromagnetic waves to pass through, so it is necessary to protect the cable through hole. The cable penetration structure is arranged in sections. In this embodiment, the cable penetration structure includes three sections of cable threading rings, each of which is a ring structure with a through hole in the middle and connected end to end on the outside. One of the cable threading rings is fixedly arranged in the cable through hole to form a fixed threading ring 2, and the other two are movable threading rings. Two adjacent cable threading rings are fixedly connected when in use, that is, one end of the fixed threading ring 2 is fixedly connected to one of the movable threading rings, and the other end of the fixed threading ring 2 is fixedly connected to the other movable threading ring, so as to jointly piece together the cable penetration structure in the length direction. Of course, in other embodiments, the cable penetration structure can also be divided into other numbers of cable threading rings, such as four, two of which are fixed threading rings and the other two are movable threading rings, in which case the two fixed threading rings are located in the middle and are both fixed in the cable through hole. Alternatively, three movable threading rings are provided, two of which are fixedly connected.

[0041] like Figure 1 and Figure 3 As shown, specifically, the fixed wearing ring 2 is an integrated annular structure connected end to end. In this embodiment, the fixed wearing ring 2 is a square ring. Of course, in other embodiments, the fixed wearing ring can also be a circular ring. It is worth noting that the fixed wearing ring 2 needs to be adapted to the cable via, and the cable via is a hole cut out during wiring, so the square hole is more convenient to cut. The outer peripheral surface of the fixed wearing ring 2 is used to be welded and connected to the cable via, thereby realizing the setting of the fixed wearing ring 2. Of course, in other embodiments, the fixed wearing ring can also be installed in the cable via by bonding with conductive adhesive.

[0042] like Figure 1 , Figure 3 and Figure 4As shown, after the fixed threading ring 2 is installed in the cable through hole, it actually forms an installation foundation for the movable threading ring to be installed. In order to realize the installation of the movable threading ring, the first installation parts for installing the movable threading ring are respectively provided at both ends of the fixed threading ring 2. Specifically, the first installation part is a first bolt installation hole 21 provided on the end face of the fixed threading ring 2. The first bolt installation hole 21 is a threaded hole, and locking can be achieved without the cooperation of a nut when cooperating with a screw. At the same time, in order to simplify the installation, the first bolt installation hole 21 penetrates the fixed threading ring 2 along the length direction of the fixed threading ring 2, that is, the first bolt installation hole 21 is a through hole, so that the same bolt installation hole can simultaneously fix different movable threading rings on both sides. Of course, in other embodiments, the first bolt installation hole can also be set as a blind hole, and the corresponding first bolt installation holes on the end faces of the two ends of the fixed threading ring can be coaxially arranged or staggered. If the length of the fixed threading ring is small, the connection and tightening degree of the movable threading ring can be increased when the first bolt installation holes are staggered.

[0043] like Figure 1 and Figure 2 As shown, the movable wearing ring includes at least two splicing plates 31 spliced ​​along the circumferential direction. In this embodiment, the splicing plate is a U-shaped plate. A flange edge 313 is provided at one end of the splicing plate 31 close to the fixed wearing ring 2 in the length direction, and the flange edge 313 is used to connect with the fixed wearing ring 2. A second mounting portion cooperating with the first mounting portion is provided on the flange edge 313. In this embodiment, the second mounting portion is a second bolt mounting hole 32 corresponding to the first bolt mounting hole 21. The fixing is completed by passing the screw through the second bolt mounting hole 32 and tightening it in the first bolt mounting hole 21. Of course, in other embodiments, the first mounting portion and the second mounting portion can also be mutually adapted buckle structures, and the fixing of the movable wearing ring on the fixed wearing ring is completed by rotating the second mounting portion. Alternatively, in other embodiments, the movable wearing ring can also include three splicing plates, and the three splicing plates are connected to each other in the circumferential direction to form a ring.

[0044] In order to facilitate the forming of the movable wearing ring, the splicing plate 31 includes a bottom plate 311 and side plates 312 on both sides. The end of the side plate 312 away from the bottom plate 311 is provided with an outwardly bent flange 314, and the flange 314 is provided with a third bolt mounting hole 33 that matches the matching splicing plate 31. The flanges 314 of the two splicing plates 31 constituting the same movable wearing ring are fitted with each other, and the third bolt mounting holes 33 correspond to each other, so that the movable wearing ring can be fixed and formed after the bolts are installed.

[0045] By setting the cable penetration structure in separate parts and splicing the movable wearing rings in the circumferential direction, the internal space of the cable penetration structure is easily exposed, thereby facilitating the operation of personnel. Figure 4 and Figure 5 As shown, the cable 1 includes a stripping section located inside the cable penetration structure to expose the cable shielding layer 11. The cable shielding layer 11 of the stripping section and the inner hole of the cable penetration structure are filled with conductive silicone, which can prevent the cable 1 from swinging at will and seal the space in the cable through-hole to avoid electromagnetic leakage in the cable through-hole. In addition, in order to achieve stable grounding of the cable shielding layer 11 of the stripping section, a grounding wire 12 is also wrapped around the cable shielding layer 11 through a conductive tape. The end of the grounding wire 12 away from the cable 1 is provided with a grounding connection ring 121 for screws to pass through, and the grounding connection ring 121 is connected to the third bolt mounting hole 33 by screws. At this time, the bolt can not only connect the two assembly plates, but also achieve grounding of the cable shielding layer 11.

[0046] During the wiring process, when it is necessary to pass through the bulkheads of two cabins, first draw the range to be cut on the bulkhead according to the outer diameter of the fixed threading ring 2, cut the bulkhead, and form a cable through hole on the bulkhead. Then place the fixed threading ring 2 in the cable through hole on the bulkhead. At this time, it is necessary to meet the requirement that the length of the fixed threading ring 2 is not less than the thickness of the bulkhead. If the length of the fixed threading ring 2 is greater than the thickness of the bulkhead, the extension length of the fixed threading ring 2 on both sides of the bulkhead should be equal as much as possible. The fixed threading ring 2 is installed on the bulkhead by double-sided welding, and the cable 1 is passed through the fixed threading ring 2. After all the cables 1 are passed through, the insulation layer of 10-30mm at a specific position is stripped off to expose the cable shielding layer 11 of the cable 1. At this time, the stripping positions of all the cables 1 are set at the same position as much as possible, so that the stripping sections are flush. Lead out the grounding wire 12 on the cable shielding layer 11 and wrap it tightly with conductive tape so that the grounding wire 12 is in close contact with the cable shielding layer 11. At this point, the operation on the cable 1 has been completed, and the movable threading ring can be installed. Specifically, the two splicing plates 31 are spliced ​​on the outer periphery of the cable 1, and the movable threading ring after the two splicing plates 31 are spliced ​​is wrapped around the cable 1. Finally, the flange edges 313 of the two movable threading rings are aligned with the fixed threading ring 2, and the installation is completed using bolts. It is worth noting that the cable threading ring is a metal threading ring made of stainless steel. After the outer peripheral surface of the fixed threading ring is used for welding connection with the cable through hole of the bulkhead, the cable penetration structure also forms a blockage for the cable through hole of the bulkhead to prevent rust at the opening of the bulkhead.

[0047] In the embodiment of the split cable penetration structure, the split cable penetration structure in this embodiment has the same structure as the cable penetration structure in the embodiment of the electromagnetic shielding device, and will not be repeated here.

[0048] It should be clear that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. A split cable penetration structure, characterized in that: The utility model comprises at least three cable threading rings which are arranged in sections and made of conductors for passing cables, wherein at least one cable threading ring is used to be fixed at the cable through hole of the bulkhead to form a fixed threading ring, and the other cable threading rings form movable threading rings, each movable threading ring comprises at least two splicing plates spliced ​​along the circumferential direction, and a movable threading ring is arranged at the end of each end of the fixed threading ring, and two adjacent cable threading rings are fixedly connected when in use.

2. The split cable penetration structure according to claim 1, characterized in that: One fixed wearing ring is provided, and two movable wearing rings are provided. Both ends of the fixed wearing ring are respectively provided with a first mounting part for mounting the movable wearing ring, and one end of the movable wearing ring close to the fixed wearing ring is provided with a second mounting part for cooperating with the first mounting part to complete the installation.

3. The split cable penetration structure according to claim 2, characterized in that: The first mounting portion is a first bolt mounting hole provided on the end surface of the fixed penetration ring.

4. The split cable penetration structure according to claim 3, characterized in that: The first bolt mounting hole penetrates the fixed mounting ring along the length direction of the fixed mounting ring.

5. The split cable penetration structure according to any one of claims 2 to 4, characterized in that: Each movable wearing ring comprises two splicing plates, the splicing plates are U-shaped, and the two splicing plates are butt-jointed.

6. The split cable penetration structure according to claim 5, characterized in that: A flange is provided at one end of the splicing plate close to the fixed wearing ring in the length direction, and the second mounting portion is a second bolt mounting hole provided on the flange of the splicing plate.

7. The split cable penetration structure according to claim 5, characterized in that: The splicing plate comprises a bottom plate and side plates on both sides, one end of the side plate away from the bottom plate is provided with an outwardly bent flange, and the flange is provided with a third bolt mounting hole matched with the matching splicing plate.

8. An electromagnetic shielding device, comprising a cable penetration structure and a cable installed in the cable penetration structure, the cable comprising a stripping section located inside the cable penetration structure to expose the cable shielding layer, a conductive medium is filled between the cable shielding layer of the stripping section and the cable penetration structure, characterized in that: The cable penetration structure is the same as the cable penetration structure described in any one of claims 1 to 7.

9. The electromagnetic shielding device according to claim 8, characterized in that: A grounding wire is also connected between the movable wearing ring and the cable shielding layer of the cable to make the two have the same potential.

10. The electromagnetic shielding device according to claim 8 or 9, characterized in that: The cable insertion ring is a metal insertion ring made of stainless steel, and the outer peripheral surface of the fixed insertion ring is used for welding connection with the cable through hole of the bulkhead.

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