RU133624U1 - BLOCK OF MODULES OF FIBER-OPTICAL COMMUNICATION LINE - Google Patents

Abstract

1. The block of modules of the fiber optic communication line, characterized in that it contains a support frame, modules mounted on the frame and located between the partition walls, wherein each module has a section for laying the input multi-fiber cable, an assembly section for laying cable fibers and a section to accommodate the excess length of cable fibers, each module has an elongated shape, is mounted on a common axis on the frame with the possibility of rotation and removal from the axis and frame, while the axis is located in the hole of each partition and in open on the side of the groove of each module, and in the groove of each module is made integral with the module a pair of elastic clips, between which the specified axis. 2. The module block according to claim 1, characterized in that on the front side of the module near its mounting section there is a hook-handle located on the opposite side from the axis of rotation of the modules.

Description

This technical solution is intended for use in the construction of optical communication lines, in particular, to distribution cabinets designed for terminal cutting, distribution and switching of fibers of optical communication cables.

Known modular cross block containing a switchgear with a modular cross block to accommodate a large number of optical connectors (RU 2371743 C1, 03/27/2009). In a modular cross block for an optical communication line according to patent RU 2371743 there are rotary plates on which cassettes with splices of optical fibers are mounted, each rotary plate is L-shaped, its axis of rotation is perpendicular to the plane of one part of the L-shaped plate, and a section for The mounting of a cartridge with splices of optical fibers is located on another part of the plate.

A known module block or cable box containing a housing located in the housing of the panel (cassette), which are fixed in the housing and designed to accommodate optical fibers with devices for splicing them or to accommodate other optical devices, each panel: installed in the housing with the possibility of its rotation relative to the housing and may be inoperative outside the housing in order to facilitate access to the rear surface of the connectors and splice plates (US 5093885 A, 03.03.1992). In the known block of modules US 5093885A, when installing network or station cables, they are inserted into the housing, split and attached to splice plates, where they are connected to intermediate optical fibers that go to the panel with optical connectors. Cables from consumers or optical devices are then connected to the panel with optical connectors through appropriate connectors, such as a flexible fiber optic connector (pigtail).

The application (EP 0538164 A1, 04/21/1993) describes a junction box for fiber optic cables, in which the modular principle of placing elements of a fiber optic communication line mounted on plates (modules) is applied. The box consists of many devices for splicing fibers and a base plate for making connections, fixed in different places, but in close proximity to each other on the same support, like sliding sections that are pivotally mounted on the body of the junction box. Thus, due to rotation on the hinge, the support plate, being outside the housing, can be inoperative, and it is possible to carry out installation and commissioning works on it. The splicing devices themselves can be opened to receive individual optical fibers from the main cable that spliced with intermediate optical fibers leading to a support panel for connection and to which optical fibers connected are connected via optical connectors, for example flexible fiber-optic connectors - pigtails from devices and consumers. Despite the fact that this arrangement of optical fibers allows, to some extent, individual operations with connectors without affecting other existing ones, it is not suitable for limited space in cases where it is necessary to hinge the entire support with several devices for splicing fibers and base plate for making connections. In addition, in order to gain access to a single fiber or connection, it is necessary to displace all the optical fibers located in the cable box and move one or more fiber splicing devices, and this will require more time for installation and commissioning work and errors may be made.

A known block of modules of an optical communication line containing a support frame for accommodating a plurality of optical telecommunication modules, having a section for laying fiber optic cables coming from and to telecommunication modules, and in which the support frame has a plurality of plates, each of which is rotatably fixed, to provide them with separate access, and has a mounting area, configured to install and remove at least one of the many optical telecommunications modules, as well as a section with fastening means for accommodating the excess length of the fiber optic cable, the plates being essentially L-shaped and the pivot axis extending perpendicular to the plane of the plate through one of the “L” sides, and said mounting section is located on the other side of the "L". In the box, the mounting portion is substantially at the distal end of said plates with respect to the pivot axis. In the box, fiber optic cables coming out of one of the plurality of optical telecommunication modules extend in the immediate vicinity of the rotary axis of said plate and have a predetermined minimum bending radius, while the fiber optic cables are fixed to said plate by means of fixing means. The fasteners in the box are cable brackets. In the box, said optical modules have a plurality of pigtail connectors for connecting the ends of the optical fibers and at least one entry point for the optical fiber cables. In the box, said optical modules have a section for accommodating excess cable length and a splice plate for splicing optical fibers. In the box, a section for mounting at least one of the said plates is configured to install and remove at least one optical device. In the box, the optical device is a passive or active optical device (RU 2371743 C2, 10.27.2009).

In an example embodiment of the invention, the modular cable box consists of a support frame and plates installed therein. The support frame is assembled from an elongated upper and lower supporting surfaces, the ends of which are connected by the side support posts, and a side wall forming a section for laying the cable. The rack is attached to the supporting surfaces in any suitable way (for example, crimped, fastened with screws, welded) and equipped with protruding parts or spikes (not shown), so that the entire modular cable box can be installed and fixed in the corresponding grooves of the switchboard (not shown). Another rack, for example a crosshead finger, is cylindrical in shape and is attached to the supporting surface by screws.

In patent RU 2371743 C2, the pivot axis preferably passes through the end of the plate close to the access point to the support frame, so that when the plate is rotated when it becomes inoperative, easy access to the section with excess cable length is provided. The pivot axis of each plate is created using any suitable means, such as loops, a pin attached with screws, such as a crosshead pin, manipulators with a pivoting degree of mobility or equivalent assemblies. Due to this design, it is possible to access each plate separately, without having to change the position of the remaining plates or any other part of the support frame. The rotation angle of the hinged plates is preferably less than 90 ° in order to minimize the displacement of the optical fibers, but, if necessary, can be 90 ° or more. Each plate has a mounting section, designed to be installed on it with the ability to disconnect and securely fasten at least one optical telecommunication module. By the possibility of detachment is meant that the optical telecommunication module can be completely detached from the plate, providing spatial independent access to it, and then re-installed in the mounting area and securely fastened with appropriate fastening means after the work with this module is completed. This improves the maneuverability of the installation and maintenance process, since fiber-optic cables can be laid and connected inside the optical telecommunication module in the most suitable place for such work, such as the nearest optical installation or technical instrumentation, and not work in a limited reference space frames. The plate has a section for accommodating the excess length of the cable, equipped with fasteners or means for attaching this part of the cable. Thus, the fact that in addition to the portion allocated in the optical modules for excess cable length, such a portion is on each plate, improves the maneuverability in the arrangement and technological preparation of the connections between the optical fibers. Known fasteners, such as cable brackets or the like, can be used to secure fiber optic cables with the minimum bending radius of the fiber optic cables to be fixed. The advantage is that they are also laid in such a way that as a result of this there are many entry and exit points for fiber optic cables to an excess of cable length, for example, to a section for mounting an optical module for connections or to a structural element for laying a cable. The mounting portion is located at the far end of the plate with respect to the hinge, and the portion for accommodating the excess cable length is located close to the hinge. Although such placement is considered most preferred, other placement options are possible, for example, when the portion for mounting on the plate is substantially near the hinge and the portion for accommodating the excess cable length is substantially at the far end of the plate. An arrangement is also provided in which the mounting portion and the portion for accommodating the excess cable length are substantially the same distance from the hinge on the plate. Despite the fact that, along with the above-mentioned advantages, the plates of the modular cable box can be of any suitable shape, it is preferable that they are essentially L-shaped, with the hinge extending perpendicular to the “b” plane through one of the ends of the plate, and the aforementioned mounting area placed on the other end. Obviously, the shape may not strictly correspond to the L-shape, because for laying the cable or establishing a structural support, according to the specifics of the application, recesses, holes or protrusions can be made on individual sections of the plate. Each optical module has many connectors, for example, the so-called flexible fiber optic connectors, which are designed to connect the ends of the fiber optic cables - pigtails, and can have at least one entry point so that the fiber optic cables enter module. The connectors can thus be used to connect consumers or devices to the optical module, and the entry point can be used to connect the network or station cable to the splicing area or other splicing means inside the module that connect it internally to the connectors . Inside the optical module, each connector has an optical fiber leading in the optical module to the splicing sites. To accommodate the aforementioned optical fiber of each module, the optical modules preferably have a portion for accommodating excess cable length and a splice plate for splicing the optical fibers. The splice plate itself can accommodate a certain amount of fiber to be placed in addition to fiber splicers. In this regard, the advantage is that the splice plate in the optical module is pivotally mounted and can be moved to provide easy access to the section to accommodate the excess cable length, and also to facilitate installation by separating the main section to accommodate the cable from the section for splicing.

A close technical solution to the claimed is the device presented in patent RU 2371743 C2. However, this device does not fully meet the requirements of reliability of the design and increase the convenience of working with the unit regarding the installation, dismantling and maintenance of fiber-optic communication lines. Poor usability has a significant impact on the complexity and quality of work, and unsatisfactory reliability is associated with the complex form of the module (plate) having an L-shape. This form predetermines the maximum possible extension of the extreme point from the axis of rotation of the module to its working position, which creates a large bending moment on the elements connecting the module to the frame of the unit and to breakdowns under accidental loads on the module. Moreover, the complex shape of the module leads to unreasonable cost overruns.

The technical result of the utility model is to simplify the design of the module block, increasing its reliability and ease of use.

The technical result was obtained by a block of modules of a fiber optic communication line, characterized in that it contains a support frame, modules mounted on the frame and located between the partition walls, wherein each module has a section for laying an input multi-fiber cable, an assembly section for laying cable fibers and a section for accommodating the excess length of cable fibers, each module has an elongated shape, is mounted on a common axis on the frame with the possibility of rotation and removal from the axis and frame, while the axis is located in the apertures of each partition and in the groove of each module open on the side, and in the groove of each module, a pair of elastic clips, between which the specified axis is located, is made integral with the module.

On the front side of the module, near its mounting section, there is a hook-handle located on the opposite side from the axis of rotation of the modules.

1 shows a block of modules in the operating position;

Figure 2 - block in the mounting position (cover removed);

Figure 3 - block in the mounting position;

Figure 4 - module block, closed by a lid;

Figure 5 - unit module (cover removed);

Figure 6 - module, top view.

The module block of the fiber optic communication line (Fig. 1) comprises a support frame 1 having a rear wall 2, a side wall 3 and a bottom (not shown). The upper module of the unit has a cover 4, which performs the functions of the cover of the frame 1. On the rear wall 2 of the frame are fixed input elements 5 for fixing cables 6 in them (Fig.6). The housing 1 contains optical telecommunication modules 7, the so-called plate. Frame 1 in the top view has an L-shaped.

Each module 7 has a section 8 (Fig.6) for attaching a fiber optic cable, a mounting section 9 for laying excess fiber lengths, a mounting section 10 for laying fibers of excess length of mounting cords (pigtails) terminated with connectors. Each module has a tool tray 11 in the form of layer-fiber cables with pigtails for laying splice optical fibers. Each module is mounted on the axis 12 (figure 2) with the possibility of rotation on the axis and removal from the axis. Axis 12 is perpendicular to each module. Each module has an open side opening 13. The frame of the block has a bracket 14 (Fig. 1) for attaching the block to the cabinet. Between the modules there are partitions 15 (Fig. 1), mounted on the frame 1, and in each partition there is a hole in which the axis 12 is located. The axis is supported by its lower end on the bottom of the frame 1. Each module 7 has an elongated shape, extending to the side from the axis 12 (Fig.6).

In the aperture 13 of each module, there is a pair of elastic clips 16 made integral with the module, between which there is an interference fit of the module rotation axis 12. Each module on the front side has a protruding outward hook-handle 17 (Fig.6), which is designed to hook the module 7 with the hand of the installer. The hook handle 17 is located on the opposite side from the opening 13 and the axis of rotation of the module 12. An aperture 13 is located on the side of the module, and a hook-handle is located on the front side of the module.

Each module has a plurality of holders 18 with slots (FIG. 6) for mounting adapters 19 into them (slots) into which optical connectors 20 are inserted. The holders 18 are integral with the module. The longitudinal axis of each adapter 19 is inclined to the longitudinal axis of the module in order to reduce the bending radius of the optical fibers (pigtails) and connecting cords. A plate 21 is fixed on the side wall 3 of the block (FIG. 2), on which tubular elements 22 are fixed for laying connecting cords exiting the module (not shown). The bracket 14 (figure 2) is attached to the side wall 3 by means of a plate 23. In the bracket 14, a hole 24 is made for fastening the module housing 1 to the cabinet.

The block works as follows. The frame 1 of the block is mounted on load-bearing structural elements, for which the frame 1 is connected by fixing pins to the structure. After the operations, the first module 7 is mounted on the housing 1 of the block (Fig. 6), for which the open side of the opening 13 is brought in on the axis 12, and by pushing the module 7 onto the axis 12 on the left. In this case, the latches 16 snap into place and cover the axis 12 s its three sides. Turn module 7 counterclockwise to the position shown in FIG. 3. Cable 6 is inserted into the openings between the elements 5 (Fig. 2) and fix it between the elements. Cut the cable 6 into separate wires (fibers), which are laid in sections 8 and 9 (Fig.6), while providing for an excess of cable fibers that are concentrically wound on the elements located in sections 9 and 10. After the operations, the ends of the fibers are connected to holders 18, turn the module 7 clockwise by 90 ° in the operating position, which is shown in figure 1. Similar actions are performed with other modules, which are stacked on top of each other. The removal of each module 7 from the frame 1 of the block is carried out by turning it into the mounting position and pulling away from the axis 12.

Due to the above-described arrangement of the module block and the design of the module functionally connected with the frame, the structure is significantly simplified, the reliability of the connection of the modules with the frame and the convenience of operation are improved.

Claims (2)

1. The block of modules of the fiber optic communication line, characterized in that it contains a support frame, modules mounted on the frame and located between the partition walls, wherein each module has a section for laying the input multi-fiber cable, an assembly section for laying cable fibers and a section to accommodate the excess length of cable fibers, each module has an elongated shape, is mounted on a common axis on the frame with the possibility of rotation and removal from the axis and frame, while the axis is located in the hole of each partition and in open on the side of the groove of each module, and in the groove of each module is made integral with the module a pair of elastic clips, between which the specified axis. 2. The module block according to claim 1, characterized in that on the front side of the module near its mounting section there is a hook-handle located on the opposite side from the axis of rotation of the modules.

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