Electromagnetic shielding bridge

Abstract

The utility model relates to the technical field of cable bridges, and discloses an electromagnetic shielding bridge which comprises a bridge body, the bridge body comprises side plates, a bottom plate and a cover plate, the two side plates are symmetrically arranged and located between the bottom plate and the cover plate, and the side plates are provided with a plurality of heat dissipation grooves arranged in a linear array; a partition bin used for containing a weak current cable is further arranged in the length extending direction of the bridge body, the partition bin is an aluminum profile with at least one through hole in the length extending direction, and a ferromagnetic material coating is arranged on the outer surface of the partition bin. The problem that when strong and weak current cables need to share the same bridge in the prior art, the strong current cables have electromagnetic interference on the weak current cables is solved.

Description

Technical Field

[0001] This utility model relates to the field of cable tray technology, and in particular to an electromagnetic shielding cable tray. Background Technology

[0002] Cable trays are installation channels used in horizontal or vertical cabling systems. As modern cigarette manufacturing production lines become increasingly precise, the requirements for signal transmission stability (especially for low-voltage cables) are also rising. Whether low-frequency or high-frequency magnetic fields are present in the environment, they can cause electromagnetic interference to the signal lines (low-voltage cables) laid within the cable tray, affecting the stability of signal transmission.

[0003] In existing technologies, sometimes strong and weak current cables need to share the same cable tray. Although the existing cable trays are divided into compartments by setting up partitions to separate the strong and weak current cables into different compartments, the strong current cables still cause electromagnetic interference to the weak current cables, resulting in a decrease in the performance of the weak current cables and easily leading to risks. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide an electromagnetic shielded cable tray to solve the problem in the prior art where strong and weak current cables need to share the same cable tray, and strong current cables cause electromagnetic interference to weak current cables.

[0005] This utility model solves the above-mentioned technical problems through the following technical means: an electromagnetic shielding cable tray, including a cable tray body, the cable tray body including a side plate, a bottom plate and a cover plate, the two side plates are symmetrically arranged, and both side plates are located between the bottom plate and the cover plate;

[0006] Along the length extension direction of the cable tray body, there is also a compartment for placing low-voltage cables. The compartment is an aluminum profile with at least one through hole along the length extension direction, and the outer surface of the compartment is coated with a ferromagnetic material.

[0007] Optionally, the side plate is provided with multiple heat dissipation slots arranged in a linear array. Multiple supports are detachably mounted on the heat dissipation slots at the same height on the side plate, and the compartment is fixed between two side plates via these supports. The height of the compartment can be changed by altering the height of the supports.

[0008] Optionally, the bottom two sides of the compartment converge towards the center to form a symmetrical slope. The support includes a supporting surface for fixing the compartment and a snap-fit ​​surface for fixing the support. The supporting surface has the same slope as the slope. Using a detachable support to fix the compartment facilitates installation and disassembly. Simultaneously, the weight of the compartment and its internal cables allows for self-locking between the compartment and the support.

[0009] Optionally, the width of the compartment is less than the distance between the two side plates. This prevents the compartment from being difficult to remove, and the gap also facilitates heat dissipation from the compartment.

[0010] Optionally, the side plate is fixedly connected to the bottom plate, and the cover plate is slidably fitted to the side plate and detachably connected. This facilitates the removal of the cover plate for maintenance of the cable tray body.

[0011] Optionally, the base plate is provided with heat dissipation holes.

[0012] Optionally, the support is made of an insulating material. This insulating material allows the heat generated by eddy currents in the compartment's electromagnetic shield to dissipate through the heat dissipation channels.

[0013] The beneficial effects of this utility model are:

[0014] 1. This utility model separates strong and weak cables by setting up compartments with electromagnetic shielding. The ferromagnetic material coating with high magnetic permeability can resist interference from low-frequency magnetic fields, and the aluminum profile with excellent conductivity can resist interference from high-frequency magnetic fields, thereby shielding the strong cables from electromagnetic interference to the weak cables. The compartment made of aluminum profile with ferromagnetic material coating can protect the weak cables in the compartment from interference from external high and low frequency magnetic fields, ensuring the stability of signal transmission.

[0015] 2. This utility model has a simple structure. The side plate is provided with heat dissipation grooves and the bottom plate is provided with heat dissipation holes. The heat generated by the eddy currents in the electromagnetic shielding compartment can be dissipated through the heat dissipation grooves, resulting in good heat dissipation. In addition, the compartment is fixed by a detachable support, which is easy to install and disassemble. At the same time, the self-weight of the compartment and the internal cables makes the compartment and the support self-locking. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of this utility model;

[0018] Figure 3 yes Figure 2 A magnified view of a portion of point M in the middle.

[0019] Among them, 1-Cable tray body, 11-Side plate, 111-Heat dissipation groove, 12-Base plate, 13-Cover plate, 14-Compartment, 141-Sloping surface, 15-Support, 151-Supporting surface, 152-Snap-fit ​​surface. Detailed Implementation

[0020] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are for illustrative purposes only and represent schematic diagrams, not actual pictures. They should not be construed as limiting the utility model. To better illustrate the embodiments of this utility model, some components in the figures may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable that some well-known structures and their descriptions may be omitted in the figures for those skilled in the art.

[0021] In the figures of this utility model embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figure, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe the positional relationship in the figure are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above-mentioned terms can be understood according to the specific circumstances.

[0022] like Figures 1-3 As shown, this utility model provides an electromagnetic shielded cable tray, which includes a cable tray body 1. The cable tray body 1 includes a side plate 11, a bottom plate 12, and a cover plate 13. The two side plates 11 are symmetrically arranged, and both side plates 11 are located between the bottom plate 12 and the cover plate 13. The side plates 11 are provided with a plurality of heat dissipation slots 111 arranged in a linear array.

[0023] In this embodiment, along the length extension direction of the cable tray body 1, a compartment 14 for placing low-voltage cables is also provided. The compartment 14 is an aluminum profile with through holes along the length extension direction. The size and number of through holes can be set according to actual needs. The outer surface of the compartment 14 is coated with a ferromagnetic material, such as a nickel coating, an aluminum nickel cobalt coating, or a neodymium iron boron coating.

[0024] In this embodiment, each side plate 11 is provided with multiple detachable supports 15 on the heat dissipation slots 111 at the same height, and the compartment 14 is fixed between the two side plates 11 by the supports 15. The height position of the compartment 14 can be changed by changing the height position of the supports 15, making the configuration of the compartment 14 more flexible, easy to disassemble and assemble, and beneficial for later maintenance.

[0025] In this embodiment, the bottom two sides of the compartment 14 converge towards the center to form a symmetrical inclined surface 141. The support 15 includes a supporting surface 151 for fixing the compartment 14 and a snap-fit ​​surface 152 for fixing the support 15. The supporting surface 151 has the same slope as the inclined surface 141. When the compartment 14 is placed on the supporting surface 151, the snap-fit ​​surface 152 of the support 15 is in close contact with the side plate 11, thereby achieving the cooperation and fixation of the compartment 14 and the support 15. Moreover, when the cables inside the compartment 14 are heavy, the stability of the compartment 14 and the support 15 is better.

[0026] In this embodiment, to facilitate the assembly and disassembly of the compartment 14, the width of the compartment 14 is smaller than the distance between the two side plates 11, leaving a gap between the compartment 14 and the side plates 11. When the compartment 14 shields the high-frequency magnetic field, the eddy currents that generate heat can dissipate through the gap from the heat dissipation groove 111. The support 15 is made of insulating material, such as rubber or hard plastic, so that the eddy currents generated by the electromagnetically shielding compartment 14 can only be dissipated as heat through the heat dissipation groove. Compared with the conventional grounding method of the shielding cover, this reduces the need for a ground wire and reduces the risk of electric shock caused by current leakage.

[0027] In this embodiment, to facilitate the disassembly and assembly of the cover plate 13, the side plate 11 is fixedly connected to the bottom plate 12, and the cover plate 13 is slidably engaged with the side plate 11 and detachably connected. The bottom plate 12 has heat dissipation holes, while the cover plate 13 does not have holes, in order to block most of the falling smoke and dust.

[0028] The working principle of this utility model is as follows:

[0029] When laying the cable tray of this utility model, the high-voltage cable can be laid first, and then the support 15 can be inserted into the heat dissipation groove 111 of the corresponding height according to the remaining space, and placed into the compartment 14. The low-voltage cable can be laid in the compartment 14.

[0030] During the use of cable trays, when a magnetic field propagates from a medium with low permeability to a medium with high permeability, the magnetic field lines will "refract" like light rays. The higher the permeability, the more the magnetic field lines are biased towards the boundary of the medium. Specifically, when a low-frequency magnetic field exists in the environment, the ferromagnetic material coating on the surface of compartment 14 will cause most of the magnetic field lines to propagate along the inner surface of the medium after entering it, and very few magnetic field lines can penetrate the medium to reach the interior of compartment 14. Secondly, when a high-frequency magnetic field encounters metal, it will generate eddy currents on the inner wall of the metal casing, confining the magnetic field interference source inside the metal casing and preventing it from penetrating the metal body. When a high-frequency magnetic field exists in the environment, the compartment 14, made of aluminum profile, a good conductor, can ensure that the high-frequency magnetic field of compartment 14 can only bypass the metal casing due to the effect of eddy currents and cannot enter the metal casing, thus playing a shielding role. Therefore, compartment 14 has the function of shielding both high-frequency and low-frequency magnetic fields.

[0031] In addition, when the compartment 14 shields the high-frequency magnetic field, the eddy current heat generated can be dissipated through the gaps in the heat dissipation groove 111. Since the support 15 is made of insulating material, the eddy currents generated by the electromagnetically shielding compartment 14 can only be dissipated as heat through the heat dissipation groove. Compared with the conventional grounding method of shielding cover, the grounding wire is reduced, which reduces the risk of electric shock caused by current leakage.

[0032] The above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model. Technologies, shapes, and structural parts not described in detail in this utility model are all known technologies.

Claims

1. An electromagnetic shielded cable tray, comprising a cable tray body (1), wherein the cable tray body (1) includes side plates (11), a bottom plate (12), and a cover plate (13), wherein two side plates (11) are symmetrically arranged, and both side plates (11) are located between the bottom plate (12) and the cover plate (13); characterized in that: Along the length extension direction of the cable tray body (1), there is also a compartment (14) for placing low-voltage cables. The compartment (14) is an aluminum profile with at least one through hole along the length extension direction. The outer surface of the compartment (14) is coated with a ferromagnetic material.

2. The electromagnetic shielding cable tray according to claim 1, characterized in that: The side plate (11) is provided with a plurality of heat dissipation slots (111) arranged in a linear array. The side plate (11) is provided with a plurality of supports (15) on the heat dissipation slots (111) at the same height. The compartment (14) is fixed between the two side plates (11) by the supports (15).

3. The electromagnetic shielding cable tray according to claim 2, characterized in that: The bottom two sides of the compartment (14) converge towards the middle to form a symmetrical inclined surface (141). The support (15) includes a support surface (151) for fixing the compartment (14) and a snap-fit ​​surface (152) for fixing the support (15). The slope of the support surface (151) is the same as that of the inclined surface (141).

4. The electromagnetic shielding cable tray according to claim 1, characterized in that: The width of the compartment (14) is less than the distance between the two side plates (11).

5. The electromagnetic shielding cable tray according to claim 1, characterized in that: The side plate (11) is fixedly connected to the bottom plate (12), and the cover plate (13) is slidably engaged with the side plate (11) and detachably connected.

6. The electromagnetic shielding cable tray according to claim 1, characterized in that: The base plate (12) has heat dissipation holes.

7. The electromagnetic shielding cable tray according to claim 2, characterized in that: The support (15) is made of insulating material.

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