RU101210U1 - MODULAR CROSS-BOX OF OPTICAL COMMUNICATION LINK - Google Patents

Abstract

 1. A modular cross-section block of an optical communication line, characterized in that it is installed in a three-dimensional protective structure such as a cabinet with a back wall, on which a three-dimensional bracket with side step-shaped supports is mounted, a folding shelf is pivotally connected to each step of the support, having means for attaching to a removable cassette for fixing and storing optical fibers of the communication cable and their splices in it, each shelf has a bar connected to it with slots for installing removable optical adapters in them teles, the unit is removable, and all shelves in their working position have a fixed connection with the back wall. ! 2. The modular cross-section of the optical communication line according to claim 1, characterized in that the connection of the shelves with the rear wall is made by means of clamps, for which each shelf has at least one clamp for fixing it in the working position, on the back wall of the cabinet or on its supporting element there is a socket under the head of the clamp adjacent to the rear wall of the first shelf, and on each subsequent shelf, starting from the first shelf, there is a socket under the head of the clamp of the subsequent shelf.

Description

The technical solution relates to means for the construction of optical communication lines, in particular, to distribution cabinets designed for the end cutting, distribution and switching of fibers of optical communication cables.

For these purposes, fiber cabinets are widely used in fiber-optic communication lines, with each such cross cabinet containing one or more cassettes attached to the bottom of the cabinet for stacking the splice of optical fibers, as well as a patch panel attached to the housing with adapter sockets installed on it, designed to install optical connectors. Such cross-cabinets provide ease of installation, maintenance and operation if the number of fibers in the optical cables mounted in them is not large. If there are a lot of fibers in the cable, the installation and maintenance of optical connectors is difficult, since the adapter sockets are located on the cross panel in several rows, so access to the optical connectors located in the lower rows is difficult.

A more convenient design of a switchgear with a modular cross-block for accommodating a large number of optical connectors is described in patent RU 2371743, published March 27, 2009, the analogues of which are technical solutions described in US 5100221 A, March 31, 1992; RU 2138067 C1, 09/20/1999; RU 2059258 C1, 04/27/1996 and RU 2071074 C1, 12/27/1996).

In a modular cross block for an optical communication line (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 for mounting a cassette with splices of optical fibers is located on another part of the plate.

US Pat. No. 5,740,299 describes a modular cross block for an optical communication line that acts as a switchgear, which consists of a panel with ordered channels for laying optical fiber fibers and hinged on the panel with a plurality of swivel cartridges for storing splice and excess length of optical fibers. This device does not provide for the use of optical pigtails and optical adapters, sockets, therefore, if it is necessary to measure or change the switching circuit of optical fibers, it is necessary to destroy the splices of optical fibers.

Thus, the known devices do not sufficiently provide the convenience of the installers in the installation, dismantling and maintenance of fiber-optic communication lines, in particular, when working with elements of communication lines that are located in modular cross units mounted in cabinets specially designed for this purpose, which significantly affects the complexity and quality of work performed.

The technical result of the invention is to increase the convenience of working with elements of modular cross blocks of an optical communication line located in a crossover cabinet.

The technical result was obtained by a modular cross block of an optical communication line, characterized in that it is installed in a three-dimensional protective structure such as a cabinet with a rear wall on which a three-dimensional bracket with side step-shaped supports is mounted, a hinged shelf with fixing means is pivotally connected to each step of the support there is a removable cartridge for fixing and storing optical fibers of the communication cable and their splices in it, each shelf has a bar connected to it with slots for installing removable x adapters optical connectors is removable, but all the shelves in their working position have a fixed connection with the rear wall.

The connection of the shelves with the rear wall is made by means of clamps, for which each shelf has at least one clamp for fixing it in the working position, on the back wall of the cabinet or on its supporting element there is a socket for the clamp head adjacent to the rear wall of the first shelf, and on each subsequent shelf, starting from the first shelf, there is a socket under the head of the retainer for the subsequent shelf.

Figure 1 shows in front view a cross cabinet for an optical communication line (hereinafter referred to as a cabinet, one half of the cover is removed);

figure 2 is a view a in figure 1 (half of the cover is installed);

figure 3 is a section bB in figure 1;

figure 4 - section bb in figure 2;

figure 5 - hinged shelf with a strap;

figure 6 - the second embodiment of the strap, with a hole remote from the edge of the strap (fragment);

in Fig.7 - the third embodiment of the strap, with a hole close to the edge of the strap (fragment);

on Fig - mounted on a step-like bracket of the cabinet hinged shelves;

in Fig.9 is a view of G in Fig.8;

figure 10 is a view of D in figure 8;

figure 11 is a view of E in figure 9.

The modular crossover unit of the optical communication line is a removable node of the distribution devices of fiber-optic communication lines. On it there are many elements of the line located in a limited space, requiring unhindered access to them by personnel of the maintenance and installation system, as well as requiring appropriate protection from mechanical and other influences.

In this regard, a modular cross block for an optical communication line is installed in a three-dimensional protective metal structure such as a cabinet (Fig. 1) and some cabinet elements are structurally and functionally connected with the block presented in this description. The cabinet is made with the upper and lower walls 1 and 2, respectively, with holes in them 3 and 4 for input and output of communication cables and side walls 5 and 6. The said block is installed in the cabinet in the space closed by the shutters 7 and 8 of the cover, which has locks 9, while the cabinet on its rear wall has clamps 10 for fixing cables in it. In the bottom wall 2 of the cabinet there is a window 11 (FIGS. 2, 12) for outputting the connecting fiber optic cords. All the above-mentioned elements relate to the supporting structure of the cabinet, in the space of which a removable modular cross-section block of the optical communication line is mounted.

The modular cross block contains a bracket 13 (Fig. 8-11), mounted on the rear wall 12 of the cabinet, the bracket has a three-dimensional shape and on its sides adjacent to the side walls 5 and 6 of the cabinet, step-shaped supports 14 are made (Fig. 9 ) To the supports 14 by hinges 15 are attached hinged shelves 16, which are part of the block. Each shelf has elements 17 (Fig. 5) for installing a removable cartridge (not shown) on it, which serves to store a supply of optical fibers in it, as well as for fixing and storing interconnections of optical communication fibers. Each cassette is fixed on the shelf 16 by fasteners located in the holes 18 of the wall 19 of the shelf.

The shelf 16 (figure 5) has a bracket 20 connected to it with a plurality of sockets 21 made therein for removable adapters 22 of the optical connectors. On each side of the strip there are several holes 23 (6, 7) for attaching additional elements, for example supporting brackets. Each bar 20 is connected to its corresponding shelf by screws 24 located in the holes 25 of the shelf. In the rear wall 12 of the cabinet (FIG. 12), holes 26 (FIG. 3) are made for fasteners for fastening the cabinet to the wall of the cable channel. All shelves have a fixed connection with the rear wall. For this, each shelf 16 has at least one latch 27 for fixing it in a working vertical position. The latch 27 of the first shelf adjacent to the rear wall 12, fixes the shelf on the rear wall or on the element 28 of the rear wall 12 of the cabinet. The latches 27 of the remaining shelves, indicated by place 29, fix each subsequent shelf on each adjacent shelf. The head of the first latch 27 is located in the socket 30 of the element 28 of the rear wall. The head of each latch 27 in the operating position of the shelf is located in the corresponding socket 30 of the socket 30 (figure 5) of the adjacent shelf.

The support 14 is fixed to the rear wall 12 of the cabinet (FIG. 3) with fasteners 31 located in the holes of the rear wall and the holes 32 of the support (FIG. 11).

The modular cross block for the optical communication line operates as follows. The assembly of the cross block in the cabinet in the form in which it is shown in the drawings is carried out under the conditions of its production or in the installation conditions on the communication line in case of replacing one block with another side.

A feature of the installation is that the cabinet with the block located in it is first placed in a horizontal position, the locks 9 and the shutters 7 and 8 are opened, the shutters are turned to the position opposite to their working positions and, if necessary, to remove the shutters from the cabinet. Optical cables are introduced through openings 3 into the space of the cabinet and fix them in the cabinet on the back wall 12 of the cabinet with clamps 10 (Fig. 1). They are mounted on the wall of the cabinet with fasteners, which are inserted into the holes 26 made in the rear wall 12 of the cabinet.

When performing installation work related to the installation of optical fibers, their splicing or termination with optical connectors, the latches 27 of the shelves 16 are pressed sequentially and each shelf is moved to a horizontal position (Fig. 9) by turning the shelf around the hinges 15 of its fastening to the step-shaped supports 14, with this all the shelves are located one above the other in the most accessible position to them, which significantly increases the convenience of installation work.

Spread the length reserves of the optical modules (cable parts) in the block and attach them to the brackets for attaching the optical modules by passing nylon ties through the mounting holes of the brackets. Distribute the optical modules into cassettes and stack the length margin of each optical fiber (part of the optical module) in the guide elements of the cassette. The first pair of mounted optical fibers and a pigtail cord is selected, optical fibers and pigtail cords of all optical modules are sequentially welded, and then the lid is mounted on the cassette. After that, the flaps 7 and 8 of the lid are put into working position and the cabinet is closed with locks 9 (Fig. 14).

The design of the cabinet allows the latches 27 to fix the first shelf 16 on the rear wall 12 of the cabinet (Fig. 3), this means the first shelf adjacent to the rear wall of the cabinet, and each subsequent shelf 16, starting from the first shelf, to fix the latch 27 on each previous shelf . This allows you to release the shelves from the latches to transfer the shelves from the working position to the mounting position and provide free access to any of the shelves when they are in the rotated horizontal position (Fig.9).

Claims (2)

1. A modular cross-section block of an optical communication line, characterized in that it is installed in a three-dimensional protective structure such as a cabinet with a back wall, on which a three-dimensional bracket with side step-shaped supports is mounted, a folding shelf is pivotally connected to each step of the support, having means for attaching to a removable cassette for fixing and storing optical fibers of the communication cable and their splices in it, each shelf has a bar connected to it with slots for installing removable optical adapters in them teles, the unit is removable, and all shelves in their working position have a fixed connection with the back wall. 2. The modular cross-section of the optical communication line according to claim 1, characterized in that the connection of the shelves with the rear wall is made by means of clamps, for which each shelf has at least one clamp for fixing it in the working position, on the back wall of the cabinet or on its supporting element there is a socket under the head of the clamp adjacent to the rear wall of the first shelf, and on each subsequent shelf, starting from the first shelf, there is a socket under the head of the clamp of the subsequent shelf.