Cable drum with observation hole

Abstract

The utility model relates to a cable drum with an observation hole, which comprises a barrel body, disc bodies and a connecting piece, the disc bodies are connected to two ends of the barrel body, and the disc bodies are detachably connected with the barrel body; the cylinder body is of a hollow structure, the two ends of the connecting piece can penetrate through the cylinder body to be connected with the disc body, and the connecting piece is used for locking or loosening the disc body and the cylinder body; a first mounting part is arranged on the side, close to the barrel, of the disc body, a second mounting part is arranged on the barrel, and when the disc body is connected to the two ends of the barrel, the first mounting part and the second mounting part are connected in a matched mode. According to the cable drum with the observation hole, detachable connection between the drum body and the drum body is achieved through the arrangement of the first installation part and the second installation part, and meanwhile the effect of further reinforcing and stabilizing is achieved through the arrangement of the connecting piece; in addition, the barrel is made of PVC materials, the weight of the barrel is reduced, the surface is smoother, and the cable is not prone to abrasion.

Description

Technical Field

[0001] This utility model relates to the field of cable reel technology, and specifically to a cable reel with an observation hole. Background Technology

[0002] Cable reels are common auxiliary tools in the cable industry. In the production of cables, it is necessary to reel in the finished cables for subsequent storage, use and transportation.

[0003] Existing cable reels with observation holes, such as the iron-wood cable reel for easy stacking and transportation disclosed in Chinese Patent CN205687322U, specifically disclose that "the outer ring of the side plate and the shaft are connected by a reinforcing rod, and the reinforcing parts are connected to the ends of the reinforcing rods by welding, ultimately forming a hexagonal support structure. During transportation, the support mesh is installed on the upper side of the bottom cable reel and connected to the reinforcing rod by the support connector." This method requires stacking the various cable reels with observation holes after installation before transportation, which always limits the number that can be transported. In addition, the overall iron-wood structure results in a large overall weight, and the overall welding and fixing method makes it inconvenient to disassemble and maintain later, thus increasing the difficulty of transportation.

[0004] Therefore, it is necessary to improve upon the existing foundation and provide a detachable, easily transportable cable reel with an observation hole. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a cable reel with an observation hole that is simple in structure and easy to disassemble.

[0006] To solve the above-mentioned technical problems, the technical solution used in this utility model is as follows:

[0007] A cable reel with an observation hole includes a cylindrical body, a reel body, and a connector. The reel body is connected to both ends of the cylindrical body, and the reel body and the cylindrical body are detachably connected. The cylindrical body has a hollow structure, and both ends of the connector can pass through the cylindrical body and connect to the reel body. The connector is used to lock or loosen the reel body and the cylindrical body. The reel body has a first mounting part on the side near the cylindrical body, and the cylindrical body has a second mounting part. When the reel body is connected to both ends of the cylindrical body, the first mounting part and the second mounting part are matched and connected.

[0008] The disc body is also provided with an observation hole along its radial direction. The observation hole penetrates the side of the disc body near the cylindrical end and the opposite side. The observation hole is used to observe the cable wound around the cylindrical body.

[0009] Preferably, there are multiple observation holes, which are respectively located on the discs at both ends of the cylinder. The angle between two adjacent observation holes is θ, where 60°≤θ≤120°.

[0010] Preferably, the area ratio of the observation hole to the overall area of ​​the disk is 0.1 to 0.2; 88°≤θ≤92°.

[0011] Preferably, the disc body includes a connecting side plate and an inner ring. The connecting side plate is arranged in a ring shape outside the inner ring. The inner ring has a snap-fit ​​groove near one end of the cylinder body. The first mounting part is a first snap-fit ​​surface provided on the connecting side plate, which is close to the inner ring. The cylinder body is formed by multiple winding plates connected around it. The second mounting part is a second snap-fit ​​surface provided on the winding plates near both ends of the disc body. The first snap-fit ​​surface and the second snap-fit ​​surface are matched and connected, and are snapped into the snap-fit ​​groove, so that the winding plates are fixed in the inner ring and the inner side of the connecting side plate is fixed in the inner ring.

[0012] Preferably, the disc body further includes an outer ring and reinforcing ribs distributed in a spoke-like pattern. The connecting side plate is snapped between the outer ring and the inner ring. The outer ring is sleeved over the reinforcing ribs. The inner sidewall of the outer ring abuts against the outer end of the reinforcing ribs. The reinforcing ribs are located on the outer side of both the connecting side plate and the inner ring. Through holes are provided on the reinforcing ribs on both sides. The connector passes through the through holes and is detachably installed on the reinforcing ribs on both sides, so that the reinforcing ribs on both sides are relatively fixed. The connector is used to clamp and fix the connecting side plate and the winding plate. The connector also abuts against the inner sidewalls of the two inner rings.

[0013] Preferably, the first mounting part includes a mounting plate, and the cylinder can be connected to the disc body through the mounting plate; one end of the mounting plate is connected to the disc body, and the other end extends outward relative to the disc body; a guide block is provided on the outer wall of the mounting plate, and the guide block protrudes relative to the mounting plate; the second mounting part is a groove, and the guide block and the groove are matched and connected.

[0014] Preferably, the first mounting part is a mounting groove, which is arranged along the circumferential direction of the disc body, and both ends of the cylinder body can be inserted into the mounting groove and fixed to the disc body.

[0015] Preferably, the disc body is formed by pressing together multiple layers of plywood.

[0016] Preferably, the connector includes a fastening screw and a fastening nut. The disc body has bolt holes that extend through the disc body along its thickness direction. Both ends of the fastening screw can pass through the cylinder body and be connected to the bolt holes on the disc body. The fastening nut can be locked to both ends of the fastening screw.

[0017] Preferably, the disc body is provided with a plurality of first protruding ribs on the side opposite to the cylinder body, the plurality of first protruding ribs are arranged along the circumferential direction of the disc body, and the plurality of first protruding ribs are distributed at intervals along the same axis.

[0018] The disc body is also provided with a plurality of second protruding ribs on the side opposite to the cylinder body. The plurality of second protruding ribs extend along the radial direction of the disc body, and each second protruding rib intersects with the plurality of first protruding ribs to form a plurality of intersection points. Attached Figure Description

[0019] The above and other objects, features, and advantages of this invention will become clearer through a more detailed description of the preferred embodiments shown in the accompanying drawings. The same reference numerals indicate the same parts throughout the drawings, and the drawings are not intentionally drawn to scale with actual dimensions; the focus is on illustrating the gist of this invention.

[0020] Figure 1 middle Figure 1 a and Figure 1 b is a structural schematic diagram of the first embodiment of a cable reel with observation holes from different perspectives;

[0021] Figure 2 This is an exploded view of a second embodiment of the cable reel with an observation hole in this utility model;

[0022] Figure 3 This is an exploded structural diagram (excluding connectors) of a third embodiment of the cable reel with an observation hole in this utility model.

[0023] Figure 4 This is a first-view structural diagram of the disk body in this utility model;

[0024] Figure 5 This is a schematic diagram of the second-view structure of the disk body in this utility model;

[0025] Figure 6 This is a schematic diagram of the fourth embodiment of the cable reel with an observation hole in this utility model;

[0026] Figure 7 for Figure 6 A magnified view of a portion of the image;

[0027] Figure 8 for Figure 6 Structural diagrams from different perspectives;

[0028] Figure 9 This is a schematic diagram of the inner ring, connecting side plate, and winding plate of the cable reel with observation hole in the fourth embodiment.

[0029] In the figure: cylinder 1, second mounting part 10, groove 101, disc 2, first mounting part 20, mounting plate 201, guide block 202, mounting groove 203, bolt hole 21, first protruding rib 22, second protruding rib 23, connector 3, fastening screw 30, fastening nut 31; winding plate 102, second snap-fit ​​surface 103, inner ring 202, snap-fit ​​groove 203, outer ring 204, connecting side plate 205, first snap-fit ​​surface 206, reinforcing rib 207, through hole 208, observation hole 400. Detailed Implementation

[0030] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be given below with reference to the accompanying drawings.

[0031] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to and integrated with the other component, or there may be an intervening component present. The terms "mounted," "one end," "the other end," and similar expressions used in this document are for illustrative purposes only.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] Please refer to Figure 1 The first embodiment has an observation hole 400. The second embodiment is structurally the same as the first embodiment, but the observation hole 400 is not shown in the drawings. The fourth embodiment has an observation hole 400, but the structure of the cylinder and the disc is different from that of the first embodiment. In addition, the connection position of the connector in the fourth embodiment is different, as detailed below.

[0034] refer to Figures 1 to 5This utility model provides a cable reel with an observation hole, which is mainly used for winding optical fiber / communication cables. It includes a cylindrical body 1, a reel 2, and connecting parts 3. The reel 2 is connected to both ends of the cylindrical body 1, and the reel 2 and the cylindrical body 1 are detachably connected. This detachable connection facilitates the transportation of the cable reel and also facilitates subsequent maintenance or replacement of various components. The cylindrical body 1 has a hollow structure, and both ends of the connecting parts 3 can pass through the cylindrical body 1 and connect to the reel 2. The connecting parts 3 are used to lock or loosen the reel 2 from the cylindrical body 1. The reel 2 has a first mounting part 20 on the side near the cylindrical body 1, and a second mounting part 10 on the cylindrical body 1. When the reel 2 is connected to both ends of the cylindrical body 1, the first mounting part 20 and the second mounting part 10 are matched and connected. During installation, the disc body 2 and the cylinder body 1 are connected by the first mounting part 20 and the second mounting part 10 to achieve a relatively fixed state, and then locked by the connector 3, so that the disc bodies 2 at both ends clamp the cylinder body 1 in the middle, thereby ensuring the stability during use.

[0035] refer to Figures 3 to 4 In a preferred embodiment, the first mounting part 20 includes a mounting plate 201, through which the cylinder 1 can be connected to the disc 2; one end of the mounting plate 201 is connected to the disc 2, and the other end extends outward relative to the disc 2; in this embodiment, the mounting plate 201 and the disc 2 can be connected by bolts or by an integral design, thereby enhancing the overall strength of the disc 2. A guide block 202 is provided on the outer wall of the mounting plate 201, and the guide block 202 protrudes outward relative to the mounting plate 201. The second mounting part 10 is a groove 101, which is provided on the inner wall of the cylinder 1, and the guide block 202 is matched and connected to the groove 101.

[0036] refer to Figure 3 This embodiment represents a second method of installation between the cylinder 1 and the disc 2. Specifically, when the cylinder 1 and disc 2 are installed, the cylinder 1 is fitted onto the outer side of the mounting plate 201. At this time, the guide block 202 on the outer wall of the mounting plate 201 can be inserted into the groove 101 on the inner wall of the cylinder 1, achieving relative fixation of the cylinder 1. The guide block 202 mainly serves the functions of positioning and quick installation. A cavity is formed between the inner wall of the mounting plate 201 and the disc 2. When the cylinder 1 and disc 2 are connected, the hollow portion inside the cylinder 1 communicates with this cavity. This facilitates the insertion of the connector 3 for further tightening; it also achieves the connection between the cylinder 1 and disc 2 while reducing product costs.

[0037] refer to Figure 2In a preferred embodiment, the first mounting part 20 is a mounting groove 203, which is arranged along the circumferential direction of the disc body 2. Both ends of the cylinder body 1 can be inserted into the mounting groove 203 and fixed to the disc body 2. This embodiment is a third method of installation between the cylinder body 1 and the disc body 2. During installation, the disc body 2 has a mounting groove 203, and the second mounting part 10 of the cylinder body 1 (in this embodiment, the second mounting part 10 specifically refers to the end face of the cylinder body 1) is directly inserted into the mounting groove 203. Then, the cylinder body 1 and the disc body 2 are locked and fixed using the connector 3. This installation method has the advantages of simple structure and convenient installation.

[0038] In a preferred embodiment, the cylinder 1 is made of PVC, or polyvinyl chloride. The surface of the cylinder 1 made of PVC is smoother than that of other wooden / metal cylinders, making it less likely to cause wear to the optical fiber / cable. At the same time, it can also greatly reduce the weight compared to a metal structure cylinder.

[0039] In a preferred embodiment, the disc body 2 is made of multiple layers of plywood, which reduces the overall weight of the disc body 2 and makes it more aesthetically pleasing.

[0040] refer to Figures 2 to 3 In a preferred embodiment, the connector 3 includes a fastening screw 30 and a fastening nut 31. The disc 2 has bolt holes 21 that extend through the disc 2 along its thickness. Both ends of the fastening screw 30 pass through the cylinder 1 and are connected to the bolt holes 21 on the disc 2. The fastening nut 31 is then locked to both ends of the fastening screw 30. After the initial connection between the cylinder 1 and the disc 2 is relatively fixed, one end of the fastening screw 30 is inserted into the cylinder 1 through the bolt hole 21 of one disc 2 and then extends out through the bolt hole 21 of the other disc 2. The fastening nut 31 is then used to lock both ends of the fastening screw 30, thus achieving a stable assembly between the cylinder 1 and the disc 2. When disassembly is required, simply unscrew the fastening nut 31 and pull out the fastening screw 30 to disassemble the disc 2 from the cylinder 1, facilitating transportation. Furthermore, multiple fastening screws 30 can be used to improve overall stability.

[0041] refer to Figure 3 and Figure 5 In a preferred embodiment, a plurality of first protruding ribs 22 are provided on the side of the disc body 2 facing away from the cylinder body 1 (i.e., the side away from the cylinder body 1). The plurality of first protruding ribs 22 are arranged along the circumferential direction of the disc body 2, and the plurality of first protruding ribs 22 are distributed at intervals along the same axis. In this embodiment, the first protruding ribs 22 can improve the overall strength of the disc body 2, and at the same time can disperse the stress generated during the rotation of the cable reel, thereby enhancing the overall load-bearing capacity.

[0042] refer to Figure 3 and Figure 5 In a preferred embodiment, the side of the disc body 2 facing away from the cylinder body 1 is further provided with a plurality of second protruding ribs 23. The plurality of second protruding ribs 23 extend along the radial direction of the disc body 2, and each second protruding rib 23 intersects with a plurality of first protruding ribs 22 to form a plurality of intersection points (e.g., Figure 4 The four intersection points A1, A2, A3, and A4 shown in the diagram can be more than four. In this embodiment, the second protruding rib 23 has the same function as the first protruding rib 22, which will not be repeated here. It should be noted that each second protruding rib 23 intersects with multiple first protruding ribs 22 in its extending direction to form multiple intersection points, which can further improve the overall structural stability of the disk body 2.

[0043] Please refer to Figures 6 to 9 The structure of the fourth embodiment of the cable reel with observation hole in this utility model is as follows:

[0044] The cable reel with an observation hole includes a cylindrical body 1, a reel body 2, and a connector 3. The reel body 2 is connected to both ends of the cylindrical body 1, and the reel body 2 and the cylindrical body 1 are detachably connected. The cylindrical body 1 has a hollow structure, and both ends of the connector 3 can pass through the cylindrical body 1 and connect to the reel body 2. The connector 3 is used to lock or loosen the reel body 2 from the cylindrical body 1. The reel body 2 has a first mounting part 20 on the side near the cylindrical body 1, and a second mounting part 10 on the cylindrical body 1. When the reel body 2 is connected to both ends of the cylindrical body 1, the first mounting part 20 and the second mounting part 10 are matched and connected. The reel body 2 also has an observation hole 400 along its radial direction. The observation hole 400 penetrates the side of the reel body 2 near the cylindrical body 1 and the opposite side. The observation hole 400 is used to observe the cable wound on the cylindrical body 1. The observation hole 400 penetrates the reel body 2, allowing the user to directly observe the cable wound on the cylindrical body 1 without disassembling the cable reel with the observation hole. This design greatly simplifies the cable inspection and management process, allowing users to check the cable winding status and remaining amount without disassembling the entire cable reel with the inspection hole. Through the inspection hole 400, users can quickly determine if the cable winding is neat, and whether there are any loose or knotted areas. This helps to promptly identify and correct potential problems in cable management, avoiding damage or malfunctions caused by improper cable management.

[0045] In a preferred embodiment, there are multiple observation holes 400, which are respectively located on the discs 2 at both ends of the cylinder 1. The angle between two adjacent observation holes 400 is θ, where 60°≤θ≤120°. The arrangement of multiple observation holes 400 and the reasonable angle between adjacent observation holes 400 allow users to observe the cable from multiple angles, improving observation efficiency. A reasonable layout of the observation holes 400 helps maintain the structural strength of the disc 2 and avoids structural weakening due to excessive openings.

[0046] In a preferred embodiment, the ratio of the observation hole 400 to the overall area of ​​the disk body 2 is 0.1 to 0.2; 88°≤θ≤92°. The overall area of ​​the disk body 2 includes the opening area of ​​the observation hole 400. As shown in the figure, four observation holes 400 are set. Generally, the angle between two adjacent observation holes 400 is 90°, and the angle between two observation holes 400 on the same disk body 2 is 180°. This arrangement ensures that the disk bodies 2 have the same structure. During installation, two disk bodies 2 can be offset by 90°. The identical structure of the disk bodies 2 facilitates molding and processing. Through research, the optimal range of the above-mentioned area ratio and angle was found to achieve the best observation effect and structural strength. The ratio of the observation hole 400 to the area of ​​the disk body 2 and the angle of the observation hole 400 were further refined, achieving a better balance between observation effect and structural strength.

[0047] Please refer to Figure 9 In a preferred embodiment, the disc body 2 includes a connecting side plate 205 and an inner ring 202. The connecting side plate 205 is arranged in a ring shape outside the inner ring 202. The inner ring 202 is provided with a snap-fit ​​groove 203101 near one end of the cylinder body 1. The first mounting part 20 is a first snap-fit ​​surface 206 provided on the connecting side plate 205, and the first snap-fit ​​surface 206 is close to the inner ring 202. The cylinder body 1 is formed by multiple winding plates 102 connected around each other. The second mounting part 10 is a second snap-fit ​​surface 103 provided on the winding plate 102 near both ends of the disc body 2. The first snap-fit ​​surface 206 and the second snap-fit ​​surface 103 are matched and connected, and are snapped in the snap-fit ​​groove 203101, so that the winding plate 102 is fixed in the inner ring 202, and the inner side of the connecting side plate 205 is fixed in the inner ring 202. The disc 2 is connected to the cylinder 1 via a first snap-fit ​​surface 206 on the connecting side plate 205 and a second snap-fit ​​surface 103, and is simultaneously snapped into the snap-fit ​​groove 203101 for a secure connection. The snap-fit ​​design of the disc 2 and cylinder 1 simplifies the assembly process and improves assembly efficiency. The snap-fit ​​groove 203101 is annularly arranged in the inner ring 202. The cross-section of the snap-fit ​​groove 203101 is L-shaped at 90°. After the first snap-fit ​​surface 206 and the second snap-fit ​​surface 103 are assembled together, the connecting end is at a 90° angle, and the connecting end snaps into the snap-fit ​​groove 203101 for a tight and secure assembly.

[0048] Please refer to Figures 6 to 9In a preferred embodiment, the disc body 2 further includes an outer ring 204 and reinforcing ribs 207 arranged in a spoke-like pattern. A connecting side plate 205 is snapped between the outer ring 204 and the inner ring 202. The outer ring 204 is sleeved over the reinforcing ribs 207, and the inner sidewall of the outer ring 204 abuts against the outer end of the reinforcing ribs 207. The outer ring 204 is also provided with a slot (not shown) for snapping the connecting side plate 205. The connection between the connecting side plate 205 and the slot can be made using existing technology and is not limited to this. The reinforcing ribs 207 are located on the outer side of both the connecting side plate 205 and the inner ring 202. Through holes 208 are provided on the reinforcing ribs 207 on both sides. The connector 3 passes through the through holes 208 and is detachably installed on the reinforcing ribs 207 on both sides, so that the reinforcing ribs 207 on both sides are relatively fixed. The connector 3 is used to clamp and fix the connecting side plate 205 and the winding plate 102. The connector 3 also abuts against the inner sidewall of the two inner rings 202. The reinforcing ribs 207 are distributed in a spoke-like pattern, increasing the radial and axial strength of the disc 2. The outer ring 204 is fitted over the reinforcing ribs 207, further enhancing the structural strength. The connector 3 is connected to the reinforcing ribs 207 through the through holes 208, achieving a detachable and stable connection. At the same time, the connector 3 also abuts against the inner sidewalls of the two inner rings 202, increasing the stability of the connection. The connector 3 also includes the fastening screws 30 and fastening nuts 31 as described in the above embodiment. The installation and use methods of the connector 3 are as described above and will not be repeated. In this embodiment, the fastening screws 30 pass through the through holes 208 on the two reinforcing ribs 207 and the hollow structure of the cylinder 1. Then, the two ends of the fastening screws 30 are connected to the fastening nuts 31. The fastening nuts 31 are located at the outer ends of the reinforcing ribs 207 to limit the axial movement of the reinforcing ribs 207, thereby clamping and fixing the connecting side plate 205 and the winding plate 102, and also completing the fixation of the entire cable reel with the observation hole.

[0049] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A cable tray having a viewing aperture, characterized by, The application relates to a cable winding device, which comprises a cylinder, a disc and a connecting piece, the disc is connected to the two ends of the cylinder and is detachably connected to the cylinder, the cylinder is a hollow structure, the two ends of the connecting piece can pass through the cylinder and are connected to the disc, the connecting piece is used for locking or loosening the disc and the cylinder, one side of the disc close to the cylinder is provided with a first mounting part, the cylinder is provided with a second mounting part, when the disc is connected to the two ends of the cylinder, the first mounting part and the second mounting part are matched and connected, the disc is provided with observation holes along the radial direction, the observation holes pass through the side close to the cylinder and the opposite side of the disc, and the observation holes are used for observing the cable wound on the cylinder. The observation holes are multiple, the observation holes are arranged in the discs at the two ends of the cylinder, the angle between two adjacent observation holes is theta (60 DEG <= theta <= 120 DEG).

2. The cable tray with an observation hole according to claim 1, wherein, The area ratio of the observation holes to the whole disc is 0.1-0.2 (88 DEG <= theta <= 92 DEG).

3. The cable tray with an observation hole according to claim 2, wherein, The disc comprises a connecting side plate and an inner ring, the connecting side plate is annularly arranged outside the inner ring, the inner ring is provided with a clamping groove close to one end of the cylinder, the first mounting part is a first clamping surface arranged on the connecting side plate, the first clamping surface is close to the inner ring, the cylinder is formed by connecting a plurality of winding plates, the second mounting part is a second clamping surface arranged on the winding plate close to the two ends of the disc, the first clamping surface and the second clamping surface are matched and connected, and the two are clamped in the clamping groove, so that the winding plate ring is fixed on the inner ring, and the inner side of the connecting side plate is fixed in the inner ring.

4. The cable tray with an observation hole according to claim 2, wherein, The disc further comprises an outer ring and a reinforcing rib distributed in a spoke shape, the connecting side plate is clamped between the outer ring and the inner ring, the outer ring is sleeved outside the reinforcing rib, the inner side wall of the outer ring abuts against the outer end of the reinforcing rib, the reinforcing rib is located outside the connecting side plate and the inner ring, through holes are formed in the reinforcing ribs on the two sides, the connecting piece passes through the through holes and is detachably arranged on the reinforcing ribs on the two sides, so that the reinforcing ribs on the two sides are relatively fixed, the connecting piece is used for clamping and fixing the connecting side plate and the winding plate, and the connecting piece further abuts against the inner side walls of the two inner rings.

5. The cable tray with an observation hole according to claim 4, wherein, The first mounting part comprises a mounting plate, the cylinder is connected to the disc through the mounting plate, one end of the mounting plate is connected to the disc, the other end of the mounting plate extends outward relative to the disc, a guide block is arranged on the outer wall of the mounting plate, the guide block protrudes relative to the mounting plate, the second mounting part is a groove, and the guide block and the groove are matched and connected.

6. The cable tray with an observation hole according to claim 1, wherein, The first mounting part is a mounting groove, the mounting groove is arranged along the circumferential direction of the disc, and the two ends of the cylinder can be respectively inserted into the mounting groove and fixed to the disc.

7. The cable tray with an observation hole according to claim 1, wherein, The disc is formed by pressing a plurality of plywood boards.

8. The cable tray with an observation hole according to claim 1, wherein, The connecting piece comprises a fastening screw and a fastening nut, a bolt hole is formed in the disc, the bolt hole passes through and is arranged along the thickness direction of the disc, the two ends of the fastening screw can pass through the cylinder and are connected to the bolt hole of the disc, and the fastening nut can be locked on the two ends of the fastening screw.

9. The cable tray with an observation hole according to claim 1, wherein, ​ 10. The cable tray with an observation hole according to claim 1, wherein, A plurality of first protrusions are arranged on the side of the disc body away from the barrel body, the plurality of first protrusions are arranged along the circumferential direction of the disc body, and the plurality of first protrusions are spaced apart along the same axis. A plurality of second protrusions are arranged on the side of the disc body away from the barrel body, the plurality of second protrusions are arranged along the radial direction of the disc body, and each of the second protrusions intersects with the plurality of first protrusions to form a plurality of intersection points.

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