CN1664637A - Fiber-to-the-home ring laying branch fiber distribution method - Google Patents

Abstract

This invention relates to fiber to household ring cabling branch distribution method, which adopts skeleton fiber band cable and is opened with branch window connected to the sub-connector and leads out branch fiber band from the branch window cable core. The fiber band is converted into tail fiber into household through sub-connector. The said skeleton fiber band is cable around user ring with tail fiber collected into one area. The branch fiber band is cut off into front and back branch windows with each fiber band collected into one area.

Description

Fiber-to-the-home ring laying branch fiber distribution method

technical field

The invention relates to a ring laying and branching fiber distribution method for fiber-to-the-home by adopting a skeleton optical fiber ribbon cable.

Background technique

With the rapid development of communication technology and industry, optical fiber transmission has gradually expanded from medium and long-distance transmission to short-distance fiber-to-the-home. Most of the existing fiber-to-the-home cable laying and fiber distribution methods use tight-buffered optical cables and ordinary loose-tube stranded optical cables. When it is necessary to branch into the home optical fiber, it is impossible to create a separation window, so the optical cable can only be cut for splicing or laying and connecting multiple fibers at the same time. Optical cable, not only the design is complicated, the consumption of optical cable is large, the pipeline space occupied when laying is large, and a large number of cables are crowded, the divergence connection is very cumbersome, and the filling ointment in tight-buffered optical cables and ordinary loose-tubed stranded optical cables is also difficult. The construction has brought great inconvenience. The above situation is especially serious when the number of fiber-to-the-home is large.

There are also optical fiber splitters for branch connection, but the cost of laying is high and the construction is troublesome.

Contents of the invention

The technical problem to be solved by the present invention is to provide a fiber-to-the-home annular cable branching fiber distribution method with less cable consumption, simple construction and low laying cost in view of the shortcomings of the above-mentioned prior art.

The technical scheme adopted by the present invention to solve the above-mentioned problems is as follows: a skeleton type optical fiber ribbon cable is adopted, a divergence window is set at the divergence of the optical cable, the divergence window is connected with the splitter, and the cable core of the divergence window is drawn Lead out the divergent optical fiber ribbons, and the optical fiber ribbons are separated and converted into pigtails to enter the room through the splitter. The skeleton optical fiber ribbon cables are laid in a ring along the user, and the head and tail of the optical cables are gathered in one place, and the divergent optical fiber ribbons are cut off. The front and back of the split are led out from different diverging windows, and the head and tail of each fiber ribbon are also brought together in one place.

According to the above solution, the diverging window is to peel off all or part of the outer sheath of the skeleton optical fiber ribbon cable along the circumferential direction to expose a section of the cable core, and pull out the required optical fiber ribbon from the skeleton groove of the cable core.

The splitter includes a cable fixing device and an optical fiber ribbon fan-out pigtail storage tray.

The skeleton optical fiber ribbon cable has 2 to 12 fiber ribbon grooves, and the fiber ribbons placed in the fiber ribbon grooves are 4 to 8 core fiber ribbons.

The skeleton type optical fiber ribbon cable of the present invention can be laid along the horizontal and/or vertical direction, that is, connected to the horizontal pipeline and/or shaft corridor, and the extension of the optical cable along with the length corresponds to the user to open a plurality of branch windows; each branch window can be opened by extending forward The preceding diverging window cuts the optical fiber ribbon, and the cut optical fiber ribbon draws out a length of optical fiber ribbon from the diverging windows on the adjacent sides as the continuous diverging optical fiber. , connected to the transfer box.

The beneficial effects of the present invention are as follows: 1. Since each branching window can cut the optical fiber ribbon by means of the previous branching window extending forward, the continuous optical fiber ribbon is directly branched from the fiber ribbon groove of the cable core, and the skeleton optical fiber There is no filling grease in the cable core of the optical cable, so the construction and laying is very simple; 2. The skeleton optical fiber ribbon cable can accommodate more optical fibers, and multiple branch windows can be opened in the axial direction on one optical cable. A fiber optic cable can be directly branched and connected to dozens of places, and the ring-shaped laying method can make the two sections of the fiber optic ribbon divided into two can be connected at different points, so that the optical fiber in the cable can be used to the maximum extent, and the fiber-to-the-home The amount of cable consumption is greatly reduced; 3. Due to the small amount of optical cables required, the pipe space occupied by laying is small, the optical cables are easy to diverge, and the construction is simple, so the laying cost of FTTH is significantly reduced, which is conducive to the implementation and promotion of FTTH.

Description of drawings

Fig. 1 is a schematic diagram of branched fiber distribution during laying according to an embodiment of the present invention.

Fig. 2 is a structural diagram of a splitter in an embodiment of the present invention.

Fig. 3 is a left side view of Fig. 2 .

Detailed ways

Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

An embodiment of the present invention is shown in Figures 1, 2, and 3. It is used for the access of users in flat-layout houses, and adopts skeleton optical fiber ribbon cables with 4 to 8 fiber ribbon slots. The skeleton optical fiber ribbon cables 4 are installed in each house User 1 opens branch window 3, the axial length of the branch window is 40-80mm, that is, the outer sheath of the optical cable is stripped by 40-80mm to form a branch window, and the branch is drawn out from the forward extension section in the cable core of the branch window The optical fiber ribbon 2 is cut off at the front branching window, and the cut optical fiber ribbon is drawn out from the branching windows on both sides of the adjacent two sides as a continuous branching optical fiber. The optical fiber ribbon can be 4-core or 6-core, and it can be converted into pigtail 7 to enter the room through a splitter. Skeleton-type fiber optic cables are laid in a ring around the houses, and the cables are connected to the horizontal pipes between the houses. The splitter includes a box body, the two sides of the box body are provided with entrances and exits for optical cables, the box body is provided with a cable fixing device and an optical fiber tape fan-out pigtail storage tray, and the cable fixing device is composed of compression hoops 9 on both sides, A fixed cable core device can also be set, and the optical fiber ribbon fan-out pigtail storage tray includes an optical fiber ribbon storage tray 10 and a pigtail storage tray 8; One side of the corresponding cable fixing device is provided with a fiber inlet; the pigtail storage tray includes a waist-shaped or oval disk body, and one side of the disk body corresponds to the optical fiber ribbon storage tray. There is a fiber outlet 12 in the direction, and there is a fan-out module fixing device 6 in the tray. The minimum bending radius of the optical fiber ribbon storage tray and the pigtail storage tray is greater than 37.5mm, and the optical fiber ribbon storage tray has a 1.2-meter fiber ribbon storage space. ; The optical fiber ribbon storage tray and the pigtail storage tray can be equal in size, stacked up and down, and connected to each other through hinges 11 or buckles.

The tap of the present invention can be installed indoors or outdoors, and the box body of the tap used for outdoor installation must be sealed.

Claims (8)

1. A fiber-to-the-home ring laying branching fiber distribution method, which is characterized in that a skeleton optical fiber ribbon cable is used, and a branching window is opened at the branching point of the optical cable, and the branching window is connected with the splitter, and from the branching window The different optical fiber ribbons are extracted from the cable core, and the optical fiber ribbons are separated and converted into pigtails to enter the room through the splitter. The optical fiber ribbon is cut and divided into front and rear two, which are led out from different diverging windows, and the head and tail of each optical fiber ribbon are also brought together in one place. 2. According to the fiber-to-the-home circular fiber-to-the-home branching fiber distribution method according to claim 1, it is characterized in that the branching window is to peel off all or part of the outer sheath of the skeleton optical fiber ribbon cable along the circumferential direction, exposing a section Cable core, pull out the required optical fiber ribbon from the skeleton groove of the cable core. 3. The fiber-to-the-home circular cable branching and fiber distribution method according to claim 1 or 2, characterized in that the splitter includes a cable fixing device and an optical fiber ribbon fan-out pigtail storage tray. 4. According to claim 1 or 2, the fiber-to-the-home circular cable branch distribution method is characterized in that the skeleton optical fiber ribbon cable is laid along the horizontal and/or vertical direction, and a plurality of branches are opened along with the extension of the cable length window. 5. According to claim 1 or 2, the fiber-to-the-home ring-clad branching fiber distribution method is characterized in that each branching window cuts the optical fiber ribbon through the preceding branching window extending forward, and the cut optical fiber ribbon A length of optical fiber ribbon is extracted from the diverging windows on adjacent sides as continuous diverging optical fibers. 6. The fiber-to-the-home circular cable branching and fiber distribution method according to claim 1 or 2, characterized in that the axial length of the branching window is 40-80 mm. 7. According to claim 1 or 2, the ring-shaped fiber-to-the-home branching fiber distribution method is characterized in that the splitter includes a box body, and optical cable entrances and exits are arranged on both sides of the box body, and the box body is equipped with The cable fixing device and the optical fiber ribbon fan-out pigtail storage tray, the cable fixing device is composed of compression hoops on both sides, and the optical fiber ribbon fan-out pigtail storage tray includes an optical fiber ribbon storage tray and a pigtail storage tray. 8. The ring-shaped fiber-to-the-home branching fiber distribution method according to claim 7, characterized in that the optical fiber ribbon storage tray includes a waist-shaped or elliptical disk body, and one side of the disk body corresponds to the fixed cable The device is provided with a fiber inlet; the pigtail storage tray includes a waist-shaped or elliptical disk body, one side of the disk body corresponds to the fiber ribbon storage disk with a fiber inlet port, and a fiber outlet port is opened on the side of the disk body 12. There is a fan-out module fixing device in the tray, the minimum bending radius of the optical fiber ribbon storage tray and pigtail storage tray is greater than 37.5mm, and the optical fiber ribbon storage tray has a 1.2-meter fiber optic ribbon storage space.

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