Cable tray for weak current cable

Abstract

This invention discloses a cable tray for low-voltage cables, belonging to the technical field of cable trays. The cable tray includes multiple trays and covers. Each tray includes a base plate and two side plates, with support plates on the side plates and support columns on the base plate. The base plate includes an inspection plate for forming an access panel. This invention allows workers to inspect low-voltage cables within the trays without opening the covers. Hollow support columns on the base plate support the intermediate plates and also accommodate a moisture-proof cylinder, improving the overall structural strength of the tray while allowing the moisture-proof cylinder to absorb moisture from the tray's storage space, providing dehumidification. The desiccant inside the moisture-proof cylinder can be easily replaced without opening the covers. A transparent cover is connected to the lower end of the moisture-proof cylinder, allowing workers to easily monitor the humidity level within the storage space during inspections. The outer bottom wall of the base plate has a temperature-sensitive color-changing coating, enabling workers to monitor the temperature inside the tray during inspections.

Description

Technical Field

[0001] This invention belongs to the field of cable tray technology, and specifically relates to a cable tray for low-voltage cables. Background Technology

[0002] Cable trays are frames used to support cables and serve as carriers for various cable installations. In the installation of low-voltage cables, due to the high requirements for dustproofing, electromagnetic interference prevention, and moisture protection, tray-type cable trays with covers are generally used to create a closed space for dust and moisture protection. The trays and covers are often made of metal to achieve electromagnetic interference protection. However, this type of tray-type cable tray has some problems in use. First, when inspecting the internal low-voltage cables, the cover needs to be opened and the cable tray accessed from above, requiring considerable climbing. Second, when multiple cables are laid, the cable bundles tend to pile up. Third, while color-changing desiccants are generally placed inside the cable tray as an auxiliary moisture-proof measure, observing whether the desiccant has changed color requires climbing and opening the cover, and replacing it also requires opening the cover and replacing the desiccant, which is very cumbersome. Summary of the Invention

[0003] The technical problem solved by this invention is to provide a cable tray for low-voltage cables, which facilitates the daily maintenance of internal low-voltage cables.

[0004] Technical Solution: To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A cable tray for low-voltage cables includes multiple trays for forming a receiving space and a cover plate covering the trays. The trays include a base plate and two side plates connected to the base plate. The side plates are provided with support plates for supporting an intermediate plate. The base plate is provided with support columns for supporting the intermediate plate. The base plate includes an access plate for forming an access port.

[0006] Preferably, one end of the inspection plate is hinged to a side plate on one side of the pallet, and the other end of the inspection plate is detachably connected to a side plate on the other side of the pallet.

[0007] Preferably, a moisture-proof cylinder is detachably connected to the base plate, the moisture-proof cylinder contains a color-changing adsorbent desiccant, the cylinder wall of the moisture-proof cylinder has a plurality of first through holes, the support column forms a working cavity corresponding to the moisture-proof cylinder, and the support column has a second through hole communicating with the working cavity.

[0008] Preferably, the moisture-proof cylinder is connected to a transparent cover.

[0009] Preferably, the moisture-proof cylinder is provided with a first external thread, and the base plate is provided with a first internal thread corresponding to the first external thread.

[0010] Preferably, the bottom wall of the base plate is provided with a temperature-sensitive color-changing coating.

[0011] Preferably, there is one or more support columns, and the support plate is detachably connected to the support column via a first connecting bolt.

[0012] Preferably, the tray, cover, and intermediate plate are all made of metal sheet.

[0013] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0014] 1. By setting an openable inspection panel, an inspection port is formed on the tray, which makes it convenient for staff to inspect the low-voltage cables inside the tray without opening the cover, and to carry out inspection work at a low position.

[0015] 2. An intermediate plate is set to divide the internal storage space of the pallet. The pallet, cover and intermediate plate are all made of metal materials to reduce electromagnetic interference from the external environment to the low-voltage cables inside the pallet.

[0016] 3. Hollow support columns are set on the base plate. On the one hand, they support the middle plate, and on the other hand, they accommodate the moisture-proof cylinder. This improves the overall structural strength of the pallet and allows the moisture-proof cylinder to absorb moisture in the pallet's storage space, thus preventing moisture and dehumidifying. The desiccant inside the moisture-proof cylinder can be easily replaced without opening the cover.

[0017] 4. The moisture-proof cylinder is equipped with a color-changing desiccant. The desiccant changes color after absorbing moisture. The bottom of the moisture-proof cylinder is connected to a transparent cover, so the color of the desiccant can be observed from the outside. When the staff is under the cable tray, there is no need to open the cable tray or take out the moisture-proof cylinder. By observing the color of the desiccant in the moisture-proof cylinder, the relative humidity in the container space can be known, which makes it convenient for the staff to grasp the humidity in the container space during inspection.

[0018] 5. The bottom wall of the base plate is equipped with a thermochromic coating. When the temperature threshold is exceeded, the thermochromic coating changes color, making it easy to intuitively understand the temperature inside the pallet, so that staff can keep track of the temperature inside the pallet during inspections. Attached Figure Description

[0019] Figure 1 This is a top view schematic diagram of the tray structure according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure at the inspection plate in the embodiment;

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure at the support column in the embodiment;

[0022] Figure 4 This is a schematic diagram of the support column structure in an embodiment;

[0023] Figure 5 This is a schematic diagram of the moisture-proof cylinder structure in an embodiment;

[0024] Figure 6 This is a schematic diagram of the structure when the plug is connected in an embodiment. Detailed Implementation

[0025] The present invention will be further illustrated below with reference to specific embodiments. These embodiments are implemented based on the technical solutions of the present invention, and it should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0026] Example

[0027] like Figure 1 and Figure 2 As shown, a cable tray for low-voltage cables includes multiple trays and a cover plate 1. The multiple trays are connected to form a strip-shaped cable tray. The cable tray is installed using existing installation methods, such as being suspended from a floor or ceiling by multiple hangers, or supported on the ground or platform by columns or brackets. The cover plate 1 covers the tray, forming a space for accommodating low-voltage cables. When closed, the cover plate 1 seals the space, providing dust protection. The connection between the cover plate 1 and the tray can be achieved through existing direct closing, screw connection, or snap-fit ​​connection. Both the cover plate 1 and the tray are made of metal materials, such as galvanized steel, stainless steel, or aluminum alloy. Adjacent trays are connected by multiple metal screws. The trays are grounded to achieve equipotential bonding throughout. The overall metal construction ensures structural strength and provides excellent electromagnetic shielding, reducing external electromagnetic interference during the laying of low-voltage cables.

[0028] like Figure 1 and Figure 2 As shown, the tray includes a base plate 2 and two side plates 3. The base plate 2 is a rectangular plate, and the two side plates 3 are connected to both sides of the base plate 2 and extend upwards. The two side plates 3 are arranged opposite each other. In this embodiment, the base plate 2 and the two side plates 3 are integrally connected and formed by bending the same metal plate. A support plate 31 is provided on the side plate 3. The support plate 31 is connected to the middle position of the inner wall of the side plate 3 and is parallel to the base plate 2. The support plates 31 on the two side plates 3 are used to support the middle plate 4. When the middle plate 4 is placed in the tray, it is supported by the support plates 31 on both sides. The middle plate 4 is parallel to the base plate 2. The middle plate 4 divides the tray's internal storage space into upper and lower layers, which facilitates the laying of different low-voltage cables in the two layers. For example, the lower space is used to lay signal or control cables such as network cables and video cables, while the upper space is used to lay power supply cables such as control power cables. The middle plate 4 is made of metal plates such as galvanized steel, stainless steel, or aluminum alloy, which further reduces external electromagnetic interference of the cable tray and reduces electromagnetic interference between internal power lines and signal lines through the layered design.

[0029] like Figure 1 and Figure 2 As shown, the base plate 2 includes an inspection plate 21. Opening the inspection plate 21 creates an inspection opening, allowing staff to easily inspect the low-voltage cables inside the tray from below. One end of the inspection plate 21 is hinged to a side plate 3 on one side of the tray via a hinge 81, and the other end is detachably connected to a side plate 3 on the other side of the tray. An edge plate is attached to the other side plate 3. The inspection plate 21 is connected to the edge plate via a second connecting bolt 82 and a corresponding second connecting nut 83. By removing the second connecting nut 83 and the second connecting bolt 82, the inspection plate 21 can be rotated to open the inspection opening, facilitating the inspection of the low-voltage cables inside the tray without needing to open the top cover 1. This is suitable for scenarios where staff cannot climb to the top of the cable tray. Multiple trays are spaced at intervals with trays equipped with inspection plates 21 for convenient, phased inspection of the low-voltage cables.

[0030] like Figure 1 , Figure 3 , Figure 4 and Figure 6 As shown, the base plate 2 is provided with support columns 5, and there are more than one support column 5. In this embodiment, each tray is provided with two support columns 5. The support columns 5 are located in the middle of the base plate 2. The support column 5 includes a column body 51 and a top plate 52. The column body 51 is connected to the upper surface of the base plate 2, and the top plate 52 is a circular plate connected to the top of the column body 51. The upper surface of the top plate 52 is at the same height as the upper surface of the support plate 31. Therefore, when the middle plate 4 is placed on the support plate 31, the support column 5 supports the middle plate 4 from below, and the support column 5 strengthens the overall structural strength of the tray. The cylindrical column body 51 is hollow to form a working cavity 501. The wall of the column body 51 is provided with multiple second through holes 502. One end of the second through hole 502 is connected to the working cavity 501, and the other end is connected to the receiving space in the tray. Thus, the working cavity 501 is connected to the receiving space through the second through holes 502. The intermediate plate 4 is provided with a through hole corresponding to the first connecting bolt 41, and the top plate 52 is provided with a threaded hole corresponding to the first connecting bolt 41. The support plate 31 is detachably connected to the support column 5 through the first connecting bolt 41. The first connecting bolt 41 is an existing countersunk bolt. After the intermediate plate 4 is placed, the position of the intermediate plate 4 can be relatively fixed by connecting it through the first connecting bolt 41 to prevent the intermediate plate 4 from sliding back and forth.

[0031] like Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, the base plate 2 is provided with a third through hole 201 corresponding to the support column 5. The third through hole 201 communicates with the internal working cavity 501 of the support column 5. A moisture-proof cylinder 6 is detachably connected to the base plate 2. The moisture-proof cylinder 6 includes a cylinder body 61 and an end plate 62. The end plate 62 is connected to the lower outer circumferential wall of the cylinder body 61. The diameter of the cylinder body 61 is smaller than the inner diameter of the column 51. The cylinder body 61 is provided with a first external thread 611. The third through hole 201 is provided with a first internal thread corresponding to the first external thread 611. When the moisture-proof cylinder 6 is threaded to the base plate 2, the cylinder body 61 of the moisture-proof cylinder 6 enters the working chamber 501 through the third through hole 201, and the end plate 62 is located outside the working chamber 501. The cylinder body 61 of the moisture-proof cylinder 6 is used to contain the color-changing adsorbent desiccant 7. The color-changing adsorbent desiccant 7 uses existing color-changing silica gel, such as 4mm-6mm blue bead-shaped particles. After absorbing moisture, the color of the particles changes from blue to red, which can intuitively indicate the relative humidity of the environment. The cylinder body 61 of the moisture-proof cylinder 6 is provided with multiple first through holes 601. By setting multiple first through holes 601, the space inside the moisture-proof cylinder 6 is connected to the working chamber 501, and then to the receiving space in the tray. When there is water vapor in the receiving space in the tray, the color-changing adsorbent desiccant 7 can absorb the water vapor in the receiving space and change color. A transparent cover 63 is connected to the end plate 62 of the moisture-proof cylinder 6. The transparent cover 63 is made of transparent plastic, such as acrylic. The transparent cover 63 is connected to the lower end of the end plate 62 by a threaded connection. The transparent cover 63 seals the space inside the cylinder 61. Removing the transparent cover 63 allows the cylinder 61 of the moisture-proof cylinder 6 to be opened, and the color-changing desiccant 7 inside the cylinder 61 can be poured out for easy replacement. Because the transparent cover 63 is made of transparent material, the color of the color-changing desiccant 7 can be observed from the outside. When workers are under the cable tray, they do not need to open the cable tray; they can know the relative humidity in the tray by observing the color of the desiccant 7 inside the moisture-proof cylinder 6, and thus monitor the humidity level in the tray. The moisture-proof cylinder 6 does not need to be connected to every tray in the cable tray. A moisture-proof cylinder 6 can be set at intervals to monitor the humidity of the entire cable tray at multiple points. In areas where the moisture-proof cylinder 6 is not installed, the third through hole 201 is sealed by a plug 53 threadedly connected to the bottom plate 2.

[0032] like Figure 4As shown, the bottom wall of the base plate 2 is provided with a thermochromic coating 23. The thermochromic coating 23 is made of existing thermochromic pigments, such as the thermochromic pigment WS1610 produced by Shanghai Jingyan Chemical Co., Ltd. It is colorless at low temperatures and develops color at high temperatures, with a color-changing temperature range of 0-70℃. In this embodiment, 65℃ is selected. Generally, when low-voltage cables are working, the temperature is below 50℃. If the temperature in a local area is higher than 65℃, it indicates that an abnormality has occurred. The thermochromic coating 23 senses the temperature of the corresponding tray. When the temperature is below 65℃, the thermochromic coating 23 displays the original color of the paint, such as transparent or white. When the temperature is above 65℃, the thermochromic coating 23 turns red. There is no need to use a temperature sensor or connect related circuits, which makes it convenient and intuitive to monitor the temperature inside the tray, so that the staff can grasp the temperature of the corresponding tray's storage space during inspections.

[0033] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A cable tray for low-voltage cables, characterized in that, It includes multiple trays for forming a receiving space and a cover plate (1) covering the trays. The trays include a base plate (2) and two side plates (3) connected to the base plate (2). The side plates (3) are provided with support plates (31) for supporting an intermediate plate (4). The base plate (2) is provided with support columns (5) for supporting the intermediate plate (4). The base plate (2) includes an inspection plate (21) for forming an inspection port.

2. The cable tray for low-voltage cables according to claim 1, characterized in that, One end of the inspection plate (21) is hinged to the side plate (3) on one side of the pallet, and the other end of the inspection plate (21) is detachably connected to the side plate (3) on the other side of the pallet.

3. The cable tray for low-voltage cables according to claim 1, characterized in that, A moisture-proof cylinder (6) is detachably connected to the base plate (2). The moisture-proof cylinder (6) contains a color-changing adsorbent desiccant (7). The cylinder wall of the moisture-proof cylinder (6) has multiple first through holes (601). A working chamber (501) corresponding to the moisture-proof cylinder (6) is formed inside the support column (5). A second through hole (502) communicating with the working chamber (501) is provided on the support column (5).

4. The cable tray for low-voltage cables according to claim 3, characterized in that, A transparent cover plate (63) is connected to the moisture-proof cylinder (6).

5. The cable tray for low-voltage cables according to claim 3, characterized in that, The moisture-proof cylinder (6) is provided with a first external thread (611), and the bottom plate (2) is provided with a first internal thread (221) corresponding to the first external thread (611).

6. The cable tray for low-voltage cables according to claim 1, characterized in that, The bottom wall of the base plate (2) is provided with a thermochromic coating (23).

7. The cable tray for low-voltage cables according to claim 1, characterized in that, There is one or more support columns (5), and the support plate (31) is detachably connected to the support column (5) by a first connecting bolt (41).

8. The cable tray for low-voltage cables according to claim 1, characterized in that, The tray, cover (1) and intermediate plate (4) are all made of metal sheet.

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