Multi-stage expanded optical fiber cable tray, expansion system and method

Abstract

The present invention discloses a multi-stage expansion optical fiber cable channel, an expansion system and a method. The multi-stage expansion optical fiber cable channel includes a bottom plate, two extended outer side plates and two extended inner side plates. Through the mutual cooperation of the bottom plate limit block, the first docking limit block, the first rotating shaft and the bottom plate rotating sleeve, the assembly and connection of the bottom plate and the extended outer side plate can be quickly completed and the installation state of the extended outer side plate can be rotated and adjusted. Through the mutual cooperation of the second docking limit block, the inner side plate limit block, the second rotating shaft and the inner side plate rotating sleeve, the assembly and connection of the extended inner side plate and the extended outer side plate can be quickly completed and the installation state of the extended inner side plate can be rotated and adjusted. By rotating and adjusting the installation states of the extended inner side plate and the extended outer side plate, the step-by-step expansion of the optical fiber cable channel can be safely and quickly realized, which can effectively reduce or shorten the construction time of the computer room, and is convenient for subsequent expansion, rectification and maintenance.

Description

Technical Field

[0001] The present invention belongs to the technical field of optical fiber cabling, and particularly relates to a multi-stage expansion type optical fiber trough, an expansion system and a method. Background Art

[0002] In the era of mobile Internet, the data traffic is continuously increasing, and the deployment of optical fibers in computer rooms is also increasing. How to quickly deploy and elastically expand will become the focus of computer room optical fiber construction.

[0003] At present, most of the expansion of optical fiber troughs in computer rooms adopts the mode of adding new ones. In addition to the trough itself, the corresponding supports and hanging parts also need to be added accordingly, which not only wastes costs and the limited space in the computer room, but also is a burden on quick deployment and expansion.

[0004] In addition, some manufacturers also adopt a combined trough for expansion. The combined trough adopts a structure of an installation substrate, side enclosing plates on both sides and cover plates on both sides. After the side enclosing plates on both sides are inserted into the installation substrate at the bottom and then fixedly connected by bolts, the width of the trough can be adjusted through the side enclosing plates on both sides. However, on the one hand, since the side enclosing plates on both sides need to be fixedly connected by bolts and nuts after being inserted into the installation substrate, the installation is cumbersome, the efficiency is low, and the engineering installation period is long, which is not conducive to quick large-scale deployment. On the other hand, since the side enclosing plates on both sides are inserted into the installation substrate, when expanding, it is necessary to loosen the fastening bolts and nuts and then pull the side enclosing plates on both sides outward to achieve expansion. At this time, since a large number of optical fibers have been laid on the installation substrate, under the pressure of a large number of optical fibers, it is very difficult for the installation substrate and the side enclosing plates on both sides to perform relative displacement again. Therefore, multiple people need to cooperate during expansion, which is quite time-consuming and laborious. If the force is too large or the operation is careless, safety accidents may occur due to the separation of the installation substrate and the side enclosing plates on both sides. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a multi-stage expansion type optical fiber trough with reasonable structural design, safe and fast subsequent expansion.

[0006] To solve the above technical problem, the technical solution of the present invention is as follows:

[0007] The multi-stage expansion type optical fiber trough includes:

[0008] A bottom plate, on the left and right sides of the bottom plate, a plurality of bottom plate rotating sleeves are respectively formed. The bottom plate rotating sleeves are arranged at intervals along the length direction of the plate body. A bottom plate docking gap is respectively formed between two adjacent bottom plate rotating sleeves on the same side. One end of the bottom plate rotating sleeve is formed with a bottom plate limiting block extending into the bottom plate docking gap; a bottom plate fixing groove is arranged at the bottom of the bottom plate, and the bottom plate fixing groove extends along the length direction of the plate body;

[0009] There are two extended outer plates, which are respectively located on the left and right sides of the bottom plate. One side of the extended outer plate is formed with a first docking body corresponding to the docking gap of the bottom plate. One end of the first docking body has a first docking limit block that cooperates with the limit block of the bottom plate, and the other end of the first docking body has a first rotating shaft that can extend into the corresponding rotating sleeve of the bottom plate. The length of the first rotating shaft is the same as the length of the limit block of the bottom plate; the extended outer plate is hinged to the bottom plate through the first rotating shaft; several second docking bodies are formed on the other side of the extended outer plate, and outer plate docking gaps are respectively formed between two adjacent second docking bodies; one end of the second docking body has a second docking limit block, and the other end of the second docking body has a second rotating shaft; a fixing groove for the outer plate is arranged at the bottom of the extended outer plate, and the fixing groove for the outer plate extends along the length direction of the plate body;

[0010] There are two extended inner plates, which respectively correspond to the two extended outer plates. An inner plate rotating sleeve corresponding to the outer plate docking gap is formed on the side of the extended inner plate adjacent to the extended outer plate. One end of the inner plate rotating sleeve has an inner plate limit block that cooperates with the second docking limit block, and the length of the inner plate limit block is the same as the length of the second rotating shaft; the extended inner plate is hinged to the extended outer plate through the second rotating shaft; a fixing groove for the inner plate is arranged at the bottom of the extended inner plate, and the fixing groove for the inner plate extends along the length direction of the plate body.

[0011] As a preferred technical solution, the limit block of the bottom plate and the first docking limit block form a circular structure after complementation.

[0012] As a preferred technical solution, both the limit block of the bottom plate and the first docking limit block are semi-circular blocks or semi-circular ring blocks.

[0013] As a preferred technical solution, the second docking limit block and the inner plate limit block form a circular structure after complementation.

[0014] As a preferred technical solution, both the second docking limit block and the inner plate limit block are semi-circular blocks or semi-circular ring blocks.

[0015] As a preferred technical solution, the fixing groove of the bottom plate, the fixing groove of the outer plate and the fixing groove of the inner plate are all T-shaped grooves with an open bottom.

[0016] The present invention also provides an optical fiber expansion system with fast deployment speed, which can accelerate the progress of computer room construction and save expansion costs, including:

[0017] An optical fiber cable tray, and the optical fiber cable tray is the multi-stage expansion type optical fiber cable tray described above;

[0018] A support crossbeam for supporting the optical fiber duct, on which there are provided a bottom plate fixing hole, an outer side plate fixing hole and an inner side plate fixing hole;

[0019] A bottom plate fixing member for fixedly connecting the support crossbeam and the bottom plate portion of the optical fiber duct;

[0020] A side plate fixing member, in the normal mode, the side plate fixing member is used for fixedly connecting the support crossbeam and the extended outer side plate portion of the optical fiber duct; in the capacity expansion mode, the side plate fixing member is used for fixedly connecting the support crossbeam and the extended inner side plate portion of the optical fiber duct.

[0021] As a preferred technical solution, the optical fiber capacity expansion system further includes a hanging assembly for hanging the support crossbeam.

[0022] The present invention also provides an optical fiber capacity expansion method using the above-mentioned optical fiber capacity expansion system, including a normal mode, a primary capacity expansion mode and a secondary capacity expansion mode;

[0023] In the normal mode, use the bottom plate fixing member to fix the bottom plate in the optical fiber duct to the support crossbeam, rotate the two extended outer side plates in the optical fiber duct to the vertical state, and use the side plate fixing member to fixedly connect the support crossbeam and the two extended outer side plates respectively; the two extended inner side plates in the optical fiber duct are respectively hinged to the corresponding extended outer side plates and are both in the natural hanging state; at this time, the two extended outer side plates and the bottom plate together form a trough-shaped channel for accommodating optical fibers;

[0024] During primary capacity expansion, loosen the side plate fixing member between one of the extended outer side plates and the support crossbeam, rotate the loosened extended outer side plate outwards to the horizontal state, then rotate the extended inner side plate corresponding to the rotated extended outer side plate upwards to the vertical state, and use the side plate fixing member to fixedly connect the support crossbeam and the extended inner side plate rotated to the vertical state. At this time, the bottom of the trough-shaped channel for accommodating optical fibers becomes wider, and the primary capacity expansion is completed;

[0025] During secondary capacity expansion, loosen the side plate fixing member between the other extended outer side plate and the support crossbeam, rotate the extended outer side plate outwards to the horizontal state, then rotate the extended inner side plate corresponding to the rotated extended outer side plate upwards to the vertical state, and use the side plate fixing member to fixedly connect the support crossbeam and the extended inner side plate. At this time, the bottom of the trough-shaped channel for accommodating optical fibers becomes even wider, and the secondary capacity expansion is completed.

[0026] Compared with the prior art, the present invention has at least the following beneficial effects: The floor plate, extended outer side plate, and extended inner side plate are ingeniously structured. Through the mutual cooperation of the floor plate limit block, the first docking limit block, the first rotating shaft, and the floor plate rotating sleeve, the assembly and connection of the floor plate and the extended outer side plate can be quickly completed, meeting the load-bearing requirements and enabling the rotational adjustment of the installation state of the extended outer side plate. Through the mutual cooperation of the second docking limit block, the inner side plate limit block, the second rotating shaft, and the inner side plate rotating sleeve, the assembly and connection of the extended inner side plate and the extended outer side plate can be quickly completed and the installation state of the extended inner side plate can be rotationally adjusted. Through the floor plate fixing groove, the outer side plate fixing groove, and the inner side plate fixing groove and the corresponding fixing parts, the installation and adjustment fixation of the optical fiber duct and the support cross beam can be quickly achieved. The installation is fast and convenient. By rotationally adjusting the installation states of the extended inner side plate and the extended outer side plate, the step-by-step expansion of the optical fiber duct can be safely and quickly realized, effectively reducing or shortening the construction time of the computer room, and subsequent expansion, rectification, and maintenance are convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The following drawings are only intended to illustrate and explain the present invention schematically and do not limit the scope of the present invention. Among them:

[0028] Figure 1 is one of the assembly reference diagrams of the multi-stage expansion type optical fiber duct in the embodiment of the present invention;

[0029] Figure 2 is the second assembly reference diagram of the multi-stage expansion type optical fiber duct in the embodiment of the present invention;

[0030] Figure 3 is the structural schematic diagram of the floor plate in the embodiment of the present invention;

[0031] Figure 4 is Figure 3 the partial enlarged view at I in

[0032] Figure 5 is the structural schematic diagram of the extended outer side plate in the embodiment of the present invention;

[0033] Figure 6 is Figure 5 the partial enlarged view at II in

[0034] Figure 7 is the structural schematic diagram of the extended inner side plate in the embodiment of the present invention;

[0035] Figure 8 is Figure 7 the partial enlarged view at III in

[0036] Figure 9 is the step schematic diagram when installing the extended outer side plate in the embodiment of the present invention;

[0037] Figure 10It is a schematic diagram of the steps when installing the extended inner side plate in the embodiment of the present invention;

[0038] Figure 11 It is a state reference diagram of the expansion system in the normal mode in the embodiment of the present invention;

[0039] Figure 12 It is Figure 11 The partial enlarged view at IV in

[0040] Figure 13 It is an assembly schematic diagram of the support cross beam, the bottom plate and the extended outer side plate;

[0041] Figure 14 It is a schematic diagram when loosening the side plate fixing piece between the extended outer side plate and the support cross beam;

[0042] Figure 15 It is a state reference diagram of the expansion system in the expansion mode in the embodiment of the present invention. Specific embodiments

[0043] The present invention will be further described below in conjunction with the drawings and embodiments. In the following detailed description, only some exemplary embodiments of the present invention are described by way of illustration. Undoubtedly, those of ordinary skill in the art can recognize that various different ways can be used to modify the described embodiments without departing from the spirit and scope of the present invention. Therefore, the drawings and the description are illustrative in nature and are not used to limit the protection scope of the claims.

[0044] As Figure 1 and Figure 2 shown, the multi-stage expansion optical fiber trough includes a bottom plate 1, two extended outer side plates 2 and two extended inner side plates 3. The two extended outer side plates 2 are respectively located on the left and right sides of the bottom plate 1. The extended inner side plates 3 are arranged corresponding to the extended outer side plates 2. The bottom plate 1, the extended outer side plates 2 and the extended inner side plates are all made of plastic material and formed by injection molding.

[0045] Refer to Figure 3 and Figure 4A plurality of bottom plate rotating sleeves 11 are respectively formed on the left and right sides of the bottom plate 1. The bottom plate rotating sleeves 11 are multiple and are arranged at intervals along the length direction of the plate body. A bottom plate docking gap 12 is formed between two adjacent bottom plate rotating sleeves 11 on the same side. A bottom plate limiting block 13 extending to the bottom plate docking gap 12 is formed at one end of the bottom plate rotating sleeve 11. The bottom plate limiting block 13 is preferably semi-annular, but of course a semi-circular shape can also be used; a bottom plate fixing groove 14 is provided at the bottom of the bottom plate 1, and the bottom plate fixing groove 14 extends along the length direction of the plate body; the bottom plate fixing groove 14 preferably adopts a T-slot structure with an opening at the bottom, which can facilitate the placement of T-bolts, and the T-bolts can be adjusted and moved along the bottom plate fixing groove 14 to facilitate the installation and fixation of the bottom plate.

[0046] refer to Figure 5 , Figure 6 and Figure 9 A first docking body 21 corresponding to the bottom plate docking gap 12 is formed on one side of the extended outer plate 2, and one end of the first docking body 21 has a first docking limit block 22 that cooperates with the bottom plate limit block 13. In this embodiment, the first docking limit block 22 is illustrated as a semi-annular structure, and of course a semi-circular structure can also be adopted. As long as the bottom plate limit block 13 and the first docking limit block 22 complement each other to form a circular structure, they should all fall within the protection scope of the present invention; the other end of the first docking body 21 has a first rotating shaft 23 that can be extended into the corresponding bottom plate rotating sleeve 11, and the length of the first rotating shaft 23 is consistent with the length of the bottom plate limit block 13.

[0047] refer to Figure 9 When installing the extended outer panel, step (a) aligns the first docking limit block 22 of the extended outer panel 2 with the limit stopper of the corresponding bottom plate limit block 13 on the bottom plate 1; step (b) translates the first docking body 21 of the extended outer panel 2 to the bottom plate docking gap 12 of the bottom plate 1; step (c) inserts the first rotating shaft 23 of the extended outer panel 2 into the corresponding bottom plate rotating sleeve 11 on the bottom plate 1, so that the extended outer panel 2 and the bottom plate 1 can be hingedly installed. This method is not only reliable in connection and can meet the load-bearing requirements, but also quick and convenient to operate; step (d) finally, as long as the extended outer panel 2 is rotated at any angle, the first docking limit block 22 on the extended outer panel 2 and the limit stopper of the corresponding bottom plate limit block 13 on the bottom plate 1 will be staggered, and the first rotating shaft 23 of the extended outer panel 2 can only rotate in the bottom plate rotating sleeve 11, but cannot move axially, thereby realizing the limit of the extended outer panel 2 and the bottom plate 1, and preventing the extended outer panel 2 from being separated from the bottom plate 1 in other states.

[0048] Refer to Figure 5 and Figure 6A plurality of second docking bodies 24 are formed on the other side of the extended outer panel 2, and outer panel docking gaps 25 are formed between two adjacent second docking bodies 24; one end of the second docking body 24 has a second docking limit block 26, and the other end of the second docking body 24 has a second rotating shaft 27; an outer panel fixing groove 28 is provided at the bottom of the extended outer panel 2, and the outer panel fixing groove 28 extends along the length direction of the panel body; similarly, the outer panel fixing groove 28 preferably adopts a T-slot structure with an opening at the bottom, which can facilitate the placement of T-bolts, and the T-bolts can be adjusted and moved along the outer panel fixing groove 28, so as to facilitate the installation and fixation of the extended outer panel 2.

[0049] refer to Figure 7 , Figure 8 and Figure 9 The side of the extended inner plate 3 adjacent to the extended outer plate 2 is formed with an inner plate rotating sleeve 31 corresponding to the outer plate docking gap 25, and one end of the inner plate rotating sleeve 31 has an inner plate limit block 32 that cooperates with the second docking limit block 26. The second docking limit block 26 and the inner plate limit block 32 complement each other to form a circular structure, and the length of the inner plate limit block 32 is consistent with the length of the second rotating shaft 27.

[0050] refer to Figure 10 When installing the extended inner panel, in step (e), align the inner panel limit block 32 of the extended inner panel 3 with the limit stopper of the corresponding second docking limit block 26 on the extended outer panel 2; in step (f), translate the inner panel rotating sleeve 31 of the extended inner panel 3 to the outer panel docking gap 25 of the extended outer panel 2; in step (g), plug the inner panel rotating sleeve 31 of the extended inner panel 3 with the corresponding second rotating shaft 27 on the extended outer panel 2, so that the extended inner panel 3 and the extended outer panel 2 can be connected. Hinge installation; step (h), finally, as long as the extended inner panel 3 is rotated to any angle, the limit snap-in of the inner panel limit block 32 on the extended inner panel 3 and the corresponding second docking limit block 26 on the extended outer panel 2 will be staggered, and the second rotating shaft 27 of the extended outer panel 2 can only rotate in the inner panel rotating sleeve 31, and the inner panel rotating sleeve 31 cannot move axially, thereby realizing the limitation of the extended outer panel 2 and the extended inner panel 3, and avoiding the extended outer panel 2 and the extended inner panel 3 from being separated in other states.

[0051] The bottom of the extended inner plate 3 is provided with an inner plate fixing groove 33, and the inner plate fixing groove 33 is extended along the length direction of the plate body. Similarly, the inner plate fixing groove 33 preferably adopts a T-shaped groove structure with a bottom opening, which can be convenient for placing T-shaped bolts, and the T-shaped bolts can be adjusted and moved along the inner plate fixing groove 33, which is convenient for installation and fixation of the extended inner plate 3 when expanding the capacity.

[0052] refer to Figure 11And Figure 12 , an optical fiber expansion system, including the above-mentioned optical fiber cable tray, a support crossbeam 4 for supporting the optical fiber cable tray, a bottom plate fixing member 5, a side plate fixing member 6, and a hanging assembly 7 for hanging the support crossbeam 4;

[0053] Reference Figure 13 , a bottom plate fixing hole 41, an outer side plate fixing hole 42, and an inner side plate fixing hole 43 are formed on the support crossbeam 4, and each fixing hole preferably adopts a strip-shaped hole; the bottom plate fixing member 5 can be realized by a T-shaped bolt and a nut, and the T-shaped bolt slides in the bottom plate fixing groove 14 and cooperates with the nut to fixedly connect the support crossbeam 4 and the bottom plate 1 of the optical fiber cable tray.

[0054] Reference Figure 12 , the side plate fixing member 6 includes an L-shaped fixing bracket 61, a T-shaped bolt 63, and a nut 64, and locking holes 62 are respectively formed on the two fixing plates of the L-shaped fixing bracket 61; in the normal mode, the support crossbeam 4 and the extended outer side plate 2 are fixedly connected by the L-shaped fixing bracket 61, the T-shaped bolt, and the nut; in the expansion mode, the support crossbeam 4 and the extended inner side plate 3 are fixedly connected by the L-shaped fixing bracket 61 and the T-shaped bolt.

[0055] The specific installation and expansion methods are as follows:

[0056] Reference Figure 11 And Figure 13 , in the normal mode, the bottom plate 1 in the optical fiber cable tray is fixed to the support crossbeam 4 by using the bottom plate fixing member 5, the two extended outer side plates 2 in the optical fiber cable tray are rotated to the vertical state, and the support crossbeam 4 and the two extended outer side plates 2 are respectively fixedly connected by using the side plate fixing member 6; the two extended inner side plates 3 in the optical fiber cable tray are respectively hinged to the corresponding extended outer side plates 2 and are in a natural hanging state; at this time, the two extended outer side plates 2 and the bottom plate 1 together form a trough-shaped channel for accommodating optical fibers;

[0057] Reference Figure 14 , during the first-stage expansion, loosen the nut 64 on the L-shaped fixing bracket 61 between the extended outer side plate 2 and the support crossbeam 4, remove the L-shaped fixing bracket 61, then rotate the loosened extended outer side plate 2 outward to the horizontal state, and then rotate the extended inner side plate 3 corresponding to the extended outer side plate 2 upward to the vertical state, and re-use the L-shaped fixing bracket 61, the T-shaped bolt, and the nut to fixedly connect the support crossbeam 4 and the extended inner side plate 3 rotated to the vertical state. At this time, the bottom of the trough-shaped channel for accommodating optical fibers becomes wider, and the first-stage expansion is completed;

[0058] During the secondary expansion, in the same way as during the primary expansion, loosen the side plate fixing member between the other extended outer plate 2 and the support cross beam 4, rotate the extended outer plate 2 outward to the horizontal state, and then rotate the corresponding extended inner plate 3 of the extended outer plate upward to the vertical state. Then, use the side plate fixing member 6 to fixedly connect the support cross beam 4 and the extended inner plate 3. At this time, the bottom of the groove-shaped channel for accommodating optical fibers becomes wider, and the secondary expansion is completed (refer to Figure 15 ).

[0059] In summary, in the present invention, the structures of the bottom plate, the extended outer plate, and the extended inner plate are ingeniously designed. Through the mutual cooperation of the bottom plate limit block, the first docking limit block, the first rotating shaft, and the bottom plate rotating sleeve, the assembly and connection of the bottom plate and the extended outer plate can be quickly completed, and the installation state of the extended outer plate can be rotated and adjusted. Through the mutual cooperation of the second docking limit block, the inner plate limit block, the second rotating shaft, and the inner plate rotating sleeve, the assembly and connection of the extended inner plate and the extended outer plate can be quickly completed, and the installation state of the extended inner plate can be rotated and adjusted. Through the bottom plate fixing groove, the outer plate fixing groove, and the inner plate fixing groove and the corresponding fixing members, the installation, adjustment, and fixation of the optical fiber channel and the support cross beam can be quickly realized, and the installation is fast and convenient. By rotating and adjusting the installation states of the extended inner plate and the extended outer plate, the step-by-step expansion of the optical fiber channel can be safely and quickly realized, which can effectively reduce or shorten the construction time of the computer room, and the subsequent expansion, rectification, and maintenance are convenient.

[0060] The above are only the schematic specific embodiments of the present invention and are not intended to limit the scope of the present invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present invention shall fall within the scope of protection of the present invention.

Claims

1. Multi-stage expansion optical fiber trough, characterized in that, Comprising: A bottom plate, on the left and right sides of which are respectively formed a plurality of bottom plate rotating sleeves. The bottom plate rotating sleeves are arranged at intervals along the length direction of the plate body. Between two adjacent bottom plate rotating sleeves on the same side, there are respectively formed bottom plate docking gaps. One end of the bottom plate rotating sleeve is formed with a bottom plate limiting block extending towards the bottom plate docking gap. At the bottom of the bottom plate, there is a bottom plate fixing groove which extends along the length direction of the plate body. Two extended outer side plates, which are respectively located on the left and right sides of the bottom plate. On one side of the extended outer side plate, there is formed a first docking body corresponding to the bottom plate docking gap. One end of the first docking body has a first docking limiting block cooperating with the bottom plate limiting block, and the other end of the first docking body has a first rotating shaft that can extend into the corresponding bottom plate rotating sleeve. The length of the first rotating shaft is the same as that of the bottom plate limiting block. The extended outer side plate is hinged to the bottom plate through the first rotating shaft. On the other side of the extended outer side plate, there are formed a plurality of second docking bodies. Between two adjacent second docking bodies, there are respectively formed outer side plate docking gaps. One end of the second docking body has a second docking limiting block, and the other end of the second docking body has a second rotating shaft. At the bottom of the extended outer side plate, there is an outer side plate fixing groove which extends along the length direction of the plate body. Two extended inner side plates, which respectively correspond to the two extended outer side plates. On the side of the extended inner side plate adjacent to the extended outer side plate, there is formed an inner side plate rotating sleeve corresponding to the outer side plate docking gap. One end of the inner side plate rotating sleeve has an inner side plate limiting block cooperating with the second docking limiting block. The length of the inner side plate limiting block is the same as that of the second rotating shaft. The extended inner side plate is hinged to the extended outer side plate through the second rotating shaft. At the bottom of the extended inner side plate, there is an inner side plate fixing groove which extends along the length direction of the plate body. The bottom plate limiting block and the first docking limiting block form a circular structure after complementing each other. The second docking limiting block and the inner side plate limiting block form a circular structure after complementing each other.

2. The multi-stage expanded optical fiber cable channel according to claim 1, wherein: Both the bottom plate limiting block and the first docking limiting block are semi-circular blocks or semi-annular blocks.

3. The multi-stage expanded optical fiber cable channel according to claim 1, wherein: Both the second docking limiting block and the inner side plate limiting block are semi-circular blocks or semi-annular blocks.

4. The multi-stage expanded optical fiber cable tray according to claim 1, wherein: The bottom plate fixing groove, the outer side plate fixing groove and the inner side plate fixing groove are all T-shaped grooves with open bottoms.

5. A fiber optic expansion method using a fiber optic expansion system, characterized in that The fiber optic expansion system includes: A fiber optic duct, and the fiber optic duct is the multi-stage expansion type fiber optic duct described in claim 1. A support cross beam for supporting the fiber optic duct, and on the support cross beam, there are formed a bottom plate fixing hole, an outer side plate fixing hole and an inner side plate fixing hole. A bottom plate fixing member for fixedly connecting the support cross beam and the bottom plate part of the fiber optic duct. A side plate fixing member. In the normal mode, the side plate fixing member is used for fixedly connecting the support cross beam and the extended outer side plate part of the fiber optic duct. In the expansion mode, the side plate fixing member is used for fixedly connecting the support cross beam and the extended inner side plate part of the fiber optic duct. A hanging component for suspending the support cross beam; The optical fiber expansion method includes a normal mode, a primary expansion mode, and a secondary expansion mode; In the normal mode, the bottom plate in the optical fiber trough is fixed to the support cross beam by using the bottom plate fixing member, and two extended outer side plates in the optical fiber trough are rotated to the vertical state, and the support cross beam is fixedly connected to the two extended outer side plates respectively by using the side plate fixing member; two extended inner side plates in the optical fiber trough are respectively hinged to the corresponding extended outer side plates and are both in a natural drooping state; at this time, the two extended outer side plates and the bottom plate together form a trough-shaped channel for accommodating optical fibers; During primary expansion, loosen the side plate fixing member between one of the extended outer side plates and the support cross beam, rotate the loosened extended outer side plate outward to the horizontal state, then rotate the extended inner side plate corresponding to the rotated extended outer side plate upward to the vertical state, and use the side plate fixing member to fixedly connect the support cross beam to the extended inner side plate rotated to the vertical state. At this time, the bottom of the trough-shaped channel for accommodating optical fibers becomes wider, and the primary expansion is completed; During secondary expansion, loosen the side plate fixing member between the other extended outer side plate and the support cross beam, rotate the extended outer side plate outward to the horizontal state, then rotate the extended inner side plate corresponding to the rotated extended outer side plate upward to the vertical state, and use the side plate fixing member to fixedly connect the support cross beam to the extended inner side plate. At this time, the bottom of the trough-shaped channel for accommodating optical fibers becomes even wider, and the secondary expansion is completed.

Images