CN101369040B - Buried large-capacity optical cable transfer box - Google Patents

Abstract

The invention relates to an underground large capacity optical cable connecting box, which belongs to the optical cable transmission technique field. The connecting box includes a box body and a seal cover, and a cable inlet, an optical cable routing bracket, an optical cable core-strengthening fixed card, an optical fiber fixed card, a guide fiber groove, a fusion fiber tray, a jumping wire coil fiber case and the like are arranged in the box body. The cable inlet, the optical cable core-strengthening fixed card and the optical fiber fixed card are respectively positioned on the sidewall of the upper part of the box body. The optical cable routing bracket is positioned on the peripheral wall of the upper part of the box body, and the fusion fiber tray is positioned on two opposite walls in the box body. The guide fiber groove is connected between the optical cable core-strengthening fixed card and the fusion fiber tray, and the jumping wire coil fiber case is arranged at one side of the fusion fiber tray. The connecting box has the advantages that: the construction is simple and swift, the construction can be easily executed in downtown flourishing sections, can not affect the traffic, and can effectively reduce the occupied land area of downtown streets. The underground connecting box can be prevented from damaging, so as to ensure the secure communication. The connecting box has large capacity, and can be applied to the convergence layer and the optical cable inlet and outlet layers where optical fibers are centralized.

Description

Buried large-capacity optical cable transfer box

technical field

The invention relates to an underground large-capacity optical cable transfer box, which belongs to the technical field of optical cable transmission.

Background technique

The optical cable transfer box is an interface device used for the backbone optical cable and distribution optical cable node in the optical fiber metropolitan area network, which can realize the fusion splicing, disk storage, distribution and scheduling of optical fibers. With the increasing opening of the telecommunications market, operators are stepping up the construction of their own optical cable metropolitan area network. The large-scale construction of optical cable metropolitan area network will greatly increase the demand for optical cable transfer boxes. Existing fiber optic cable transfer boxes are generally placed on the ground, which has the disadvantages of affecting city appearance, affecting traffic, occupying land resources, and not meeting the requirements of modern cities. The construction of a harmonious city has higher requirements on the aesthetics of the city, which makes it more difficult to select the location of the ordinary outdoor optical cable transfer box, and the outdoor optical cable transfer box is easy to cause man-made damage, and there is no early warning system in the event of damage or damage. Even seriously affect the efficiency of optical fiber communication.

The United States Minnesota Mining Manufacturing Co., Ltd. (3M Company) proposed an underground optical cable transfer box. The principle is to put the ordinary ground optical cable transfer box into a protective box, and then bury it underground. The tank is raised to the ground for maintenance operations. The disadvantage of the optical cable transfer box is that it is inconvenient to maintain and there is no accident warning system, so once a damage accident occurs, the maintenance takes a long time. Moreover, the communication capacity is small and cannot meet actual needs.

Contents of the invention

The object of the present invention is to propose a buried large-capacity optical cable transfer box, which improves the structure of the existing optical cable transfer box so that the transfer box is easy to maintain and expands the communication capacity of the transfer box.

The buried large-capacity optical cable transfer box proposed by the present invention includes a box body and a sealed box cover. The box body is provided with a cable inlet, an optical cable routing frame, an optical cable reinforcement core fixing card, an optical cable fixing card, a fiber guide groove, a melting fiber tray, jumper tray fiber barrel, retractable pedal point and emergency drainage hole, the cable inlet, cable reinforcement core fixing card and cable fixing card are respectively located on the upper side wall of the box body, and the cable routing The frame is located on the surrounding walls of the upper part of the box, and the splicing tray is located on two opposite side walls of the box, and the fiber guide groove is connected between the fixed card of the optical cable reinforcement core and the splicing tray. The barrel is placed on one side of the splicing tray, the telescopic pedaling point is placed on the side wall of the box, and the emergency drain hole is located at the lower part of the box.

The advantages of the buried large-capacity optical cable transfer box proposed by the present invention are:

1. The transfer box proposed by the present invention can be assembled in advance as a whole, and then it can be directly put into the dug pit and backfilled with earth and stone, so the construction is simple and fast. It can be used to dig and backfill at night when there are few traffic vehicles and people, so it is easy to construct in downtown areas. The optical cable entry and welding in the transfer box are all carried out in the underground box, which has no impact on traffic.

2. Ordinary outdoor optical cable transfer boxes occupy above-ground resources, affecting the city appearance and traffic. The transfer box of the present invention is directly buried underground, which effectively reduces the area occupied by urban streets, so it can be widely used in urban bustling areas, commercial areas or Residential area.

3. The transfer box of the present invention is buried underground without attracting the attention of pedestrians, thus avoiding artificial damage to the transfer box and ensuring communication safety.

4. In the transfer box of the present invention, construction personnel can directly enter the box to work, which is convenient for the maintenance and installation of optical cable transfer.

5. The transfer box of the present invention has a large capacity (up to 2304 cores at most), and can be used for the convergence layer where the optical cables are relatively concentrated and for the incoming and outgoing optical cables.

Description of drawings

Fig. 1 is a schematic structural view of the buried large-capacity optical cable transfer box proposed by the present invention.

Fig. 2 is an A-direction view of the transfer box shown in Fig. 1 .

Fig. 3 is a schematic diagram of an optical cable fixing card.

Fig. 4 is a schematic diagram of a reinforcing core fixing card.

Fig. 5 is a schematic view of the use of the transfer box of the present invention.

In Figures 1 to 5, 1 is the cable inlet, 2 is the splicing tray, 3 is the fixing card of the fiber optic cable reinforcement core, 4 is the fixing card of the fiber optic cable, 5 is the sealing box cover, 6 is the box body, and 7 is the retractable pedal 8 is the emergency drainage hole, 9 is the ground, 10 is the manhole cover, 11 is the fiber guide groove, 12 is the fiber jumper barrel, 13 is the semicircular clip, 14 is the fastening screw, and 15 is the reinforcing core fixing circle Holes, 16 are reinforcing core fastening screws, and 17 are optical cable wiring racks.

Detailed ways

The buried large-capacity optical cable transfer box proposed by the present invention has a structure as shown in FIG. 1 , including a box body 6 and a sealed box cover 5 . The box body 6 is equipped with a cable inlet 1, an optical cable rack 17, an optical cable reinforcement core fixing card 3, an optical cable fixing card 4, a fiber guide groove 11, a fusion fiber tray 2, a jumper tray fiber barrel 12, and a retractable pedal Point 7 and emergency drain 8. The cable inlet 1 , the fiber optic cable strengthening core fixing card 3 and the fiber optic cable fixing card 4 are respectively located on the upper side wall of the box body 6 . The optical cable running rack 17 is positioned on the walls around the top of the casing 6 . As shown in Figure 2, the splicing tray 2 is located on two opposite side walls of the box body 6, the fiber guide groove 11 is connected between the fiber optic cable reinforcement core fixing card 3 and the splicing tray 2, and the jumper tray fiber barrel 12 is placed On one side of the splice tray 2. The telescopic pedaling point 7 is placed on the side wall of the box body 6, and the emergency drainage hole 8 is located at the bottom of the box body.

The construction method of the buried large-capacity optical cable transfer box proposed by the present invention is introduced in detail below in conjunction with the accompanying drawings:

Use manual or excavator to excavate a pit larger than the size of the handover box at the measurement site, pave and tamp the bottom of the pit, and generally excavate near the man (hand) hole to facilitate the introduction of optical cables. The handover box proposed by the present invention is stably placed in the pit, and the long side of the box body is perpendicular to the road direction (that is, perpendicular to the pipeline direction). Pass the optical cable into the transfer box through the cable inlet 1, reserve an appropriate length, and pass through the optical cable rack 17 to reach the fixed position of the optical cable. The person enters the box through the box opening, uses the telescopic pedal point 7 to go down to the bottom of the box, strips the optical cable introduced into the box, and fixes it on the cable fixing card 4, as shown in Figure 2. The structure of the optical cable fixing card 4 is as shown in Figure 3. After the optical cable is clamped with the semicircle clamp 13, the two ends of the semicircle clamp are fastened on the clamp with fastening screws 14. Then the fiber optic cable reinforcement core is fixed on the reinforcement core fixing card 3, the structure of the reinforcement core fixing card 3 is shown in Figure 4, the fiber optic cable reinforcement core is stretched into the round hole 15, and the fiber optic cable reinforcement core is clamped with the reinforcement core fastening screw 16. tight. Finally, the optical fiber is threaded into the protective tube (not shown in the figure), and the optical fiber enters the fiber splicing tray 2 through the fiber guide groove 11 for fusion splicing. When jumping wires are needed, the fiber jumper can be placed on the fiber jumper drum 12 so that it does not cross and messy.

After the construction in the handover box is finished, the box is cleaned up, and the garbage is taken out of the box, the sealed box cover 5 is fastened with screws, sealed, and the outer cover 10 is covered. The final use state diagram is as shown in Figure 5.

Claims (1)

1. An underground large-capacity optical cable handover box is characterized in that the handover box includes a box body and a sealed box cover, and the box body is provided with a cable inlet, an optical cable routing frame, an optical cable strengthening core fixing card, and an optical cable fixing card , fiber guide groove, spliced fiber tray, jumper tray fiber barrel, retractable pedal point and emergency drainage hole, the cable inlet, optical cable reinforcement core fixing card and optical cable fixing card are respectively located on the upper side wall of the box body, The optical cable rack is located on the surrounding walls of the upper part of the box, the splicing tray is located on two opposite side walls of the box, and the fiber guide groove is connected between the fixing card of the optical cable reinforcement core and the splicing tray Between them, the fiber barrel of the jumper tray is placed on one side of the splicing tray, the telescopic pedaling point is placed on the side wall of the box, and the emergency drainage hole is located at the lower part of the box.

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