KR100329826B1 - Water sensible optical fiber splice closure - Google Patents

Abstract

The present invention relates to an optical enclosure that protects a connection point of a communication cable, and in particular, to secure reliability of an optical cable, an optical enclosure and a separate sealing system designed to check the presence of moisture in the housing without opening and closing the enclosure. Without the use of the end plug itself, the optical housing is designed to isolate the cable entry and exit holes from the external environment regardless of the cable size, and the tray protecting the connection point of the optical fiber is a mechanical connector, heat shrink sleeve, and ribbon. Regarding the optical splice enclosure that can be accommodated regardless of the type of splice such as optical fiber splicing sleeve, the housing is divided into upper and lower parts (1, 2), and the color change can be distinguished according to the moisture content inside the enclosure. The sensor 11 for moisture detection and the bolt 26 fixing the upper and lower housings 1 and 2 are completely separated from the upper housing 1. To protect the connection points of the optical fiber and the optical stopper that can seal the cable entry and exit ports regardless of the outer diameter of the cable without using a sealing material. It is an optical splice enclosure that can detect moisture permeation, including a tray 25 that can be aligned regardless of the type of splicer.

Description

Water sensible optical fiber splice closure}

The present invention relates to an optical splice enclosure capable of detecting moisture penetration. In detail, in the optical connection enclosure having the function of protecting the connection point of the cable from the external environment among the devices that protect the connection point of the communication cable, in particular, the presence or absence of moisture in the interior of the enclosure is visually confirmed through a moisture sensor. Can be separated and the upper and lower housings can be completely separated without the bolts that secure the housing completely from the upper housing, and the cable inlet and outlet ports can be used regardless of the outer diameter of the cable without using a separate sealing material. It is related to the optical splice enclosure which can detect the moisture penetration of the new structure that can be all aligned in one tray regardless of the type of splice which can seal the rubber stopper and the splice protecting the splicing point of the optical fiber.

Communication lines using cables generate connection points every certain length, and devices that completely protect the connection points from the external environment (humidity, insects, vibration, tension, etc.) and prevent light loss from these connection points It is a junction box.

Existing optical splice enclosures have many types, but they have to be opened at all times to check the presence of moisture in the enclosure.Therefore, there was always a risk factor in the reliability of the tracks, and it was difficult to reuse the enclosures. It took a lot of time. In addition, the conventional case is a method of sealing the cable inlet, outlet hole (Hole) in most cases is a structure that is sealed with a bolt by winding a sticky and adhesive sealing tape to the cable to be introduced, drawn out Some of them have a structure in which a plug is formed and sealed by using various types of grommets suitable for the cable outer diameter.

However, the method of sealing cable inlet and outlet holes by using sealing tape among the devices according to the conventional method is very poor in workability when installing the junction box or maintaining the connection point due to the sticky nature of the sealing tape. In case of construction, a certain amount of sealing tape must be wound around the cable to be drawn in and drawn out. Therefore, there is a problem in that cable entry and exit holes have different sealing properties depending on the function of the operator. In addition, this method has a problem such that the reliability of the sealing is poor because it is greatly affected by the external environment, especially the temperature when used for a long time. In addition, the structure of forming the stopper using various types of grommet is mainly used for compound injection-type enclosures, which has a function of preventing the compound injected into the enclosure from leaking out. In order to maintain the sealing of the inlet and outlet, and to accommodate the outer diameter of various cables, it is necessary to grout as many as the outer diameter of the cable, and there are many kinds of accessories. Brought it. In the case of the conventional case, the method of protecting the connection point of the optical fiber has a different tray structure according to the type of connector protecting the connection point in most cases. The new tray structure was required every time a new connector was supplied.

U.S. Patent No. 5,907653 discloses an optical cable protective connection case divided into upper and lower parts in which a support for protecting an optical cable is built therein. U.S. Patent No. 5,450,518 also discloses a case and an optical cable separated from the upper and lower portions. Optical cable protective connection case with a built-in tray for protection is disclosed,

The conventional techniques use bolts and nuts to fasten upper and lower enclosures. Conventional optical enclosures have a problem that the bolts are lost during operation because the bolts must be completely separated from the nuts. There was a need for a structure that would not escape from the enclosure.

The present invention is to solve the conventional problems as described above, in order to ensure the reliability of the optical path, without having to remove all the optical connection enclosure with the naked eye and conveniently inspect the state of the connection point of the optical fiber, bolts, nuts for coupling the enclosure Is not detached from the enclosure, and it is easy to secure the sealing capability of the cable by accommodating the outer diameter of various cables with small accessories in sealing the cable inlet and outlet, and to protect the connection point of the optical fiber. Its purpose is to provide an optical tray that can detect moisture penetration that can be produced at a more economical cost by providing an inner tray that is not affected.

According to the present invention, it is easy to visually check whether moisture penetrates the connection point of the optical path without disassembling the enclosure, and seals the splice enclosure and the cable inlet and outlet hole which can be operated without the bolts and nuts being completely separated from the enclosure. By changing the conventional method of using sticky sealing tape, the sealing accessories and workability of the junction box can be improved with minimal accessories, and mechanical connectors, heat shrink sleeves, ribbon sleeves, etc. can be mounted on a single tray without changing the structure. The present invention relates to an optical splice enclosure capable of accommodating various types of connectors, and having a reliability while reducing manufacturing costs.

1 is a perspective view of an optical connection enclosure of the present invention

2 is an assembly view of the optical connection enclosure of the present invention

3 is a plan view of the optical connection enclosure of the present invention

4 is a cross-sectional view of the optical connection enclosure of the present invention.

5 is a perspective view of the inner tray of the present invention;

6 is a water sensor of the optical connection enclosure of the present invention

Figure 7 is a perspective view of the plug of the cable entry, lead portion of the present invention

8A is a state diagram before and after assembly of the upper and lower enclosures of the optical connection enclosure of the present invention

8B is a state diagram after assembling the upper and lower enclosures of the optical connection enclosure of the present invention;

Figure 9 is a perspective view of the cable protection tube departure prevention jaw of the present invention

Figure 10 Side view of the tray of the present invention

<Explanation of symbols for main parts of the drawings>

(1) Upper enclosure (2) Lower enclosure (3) Air injection valve (4) Bolt nut coupling part

(5) Moisture detection sensor inlet (6) Moisture detection sensor fixing (7) Cable entry and exit

(8) Guide groove (9) Guide jaw (10) Housing fastening groove (11) Moisture sensor

(12) Rubber caps (13) Plugs (14) Grounding terminals (15) Cylindrical hinges

(16) Semi-cylindrical hinge (17) Rubber plate (18) Upper release stop (19) Axial release stop

(20) Cylinder (21) Protective tube inlet / outlet (22) Drum (23) Connector storage

(24) Splice Storage Guide Jaw (25) Tray (26) Bolt (27) Nut

(28) Guide ribs (29) Cable locks (30) Ribs (31) Tension locks

(32) Declaration of Conformity (33) Fiber Optic Alignment Device

(35) Rubber plate fixing wall (36) Acrylic tube (37) O-ring gasket (38) Blue gel

(39) air holes

In order to achieve the above object, in the present invention, a moisture sensing sensor that changes color when moisture is in contact with the upper end of the enclosure is attached, which can be detached from the outside of the enclosure so that it can be easily observed with the naked eye without disassembling the enclosure. In order to prevent the bolts and nuts joining the enclosure from being separated from the enclosure, only a portion of the bolts and nuts fastened to the enclosure were threaded to separate the enclosure without completely removing the bolts. Unlike the conventional method of using separate plastic plugs and sealing tapes to seal the cable entry and exit ports, the cable entry and exit ports are protruded diagonally without using them and are formed on the rubber plug. By using a rubber stopper to cut and use a suitable location for cables of various sizes, the cable entry and exit holes can be sealed without additional accessories, and the connection point is protected in the middle of the tray inside the enclosure. To create a groove for storing the splice to accommodate a variety of splices, and to prevent the sputter from the side by forming a protruding round to prevent the sputter from the side of the end of the storage groove to prevent the splicer to the side, And prevent these splices from escaping up and down Characterized in that the structure is made of rubber plate is coupled to the store to the home group.

According to the present invention, it is possible to visually observe the moisture state inside the optical enclosure protecting the connection point of the communication cable without disassembling the enclosure, and the bolt is not detached even when the upper and lower enclosures are separated. Unlike a conventional method of sealing a hole, a rubber stopper can seal a cable of various sizes without a separate accessory, and relates to an optical junction box having a tray that can easily accommodate various connectors without a separate structure change. .

Unlike the conventional method of disassembling and reassembling the enclosure in order to check whether the optical cable is connected to the optical cable in the optical enclosure of the present invention, a moisture detection sensor that can be assembled and disassembled is attached to the upper end of the enclosure and, if necessary, the moisture is detected. Only the sensor was separated to observe the color change and to understand the condition of the track. This water sensor is composed of blue silica gel for indicator, transparent acrylic tube, body, and O-ring gasket, and silica gel is mainly composed of silicon dioxide (SiO ₂ ). The blue gel for indicator which shows chemical and physical adsorption characteristics by the formed pores was used.When the blue gel is absorbed after adsorption and the water content increases, the color becomes pink and when all moisture is absorbed, all colors are lost. It has a characteristic of judging how much moisture is inside the enclosure according to the color change by showing the color of white.

The moisture detection sensor composition is a strong adsorption desiccant having excellent adsorption capacity for industrial use such as air dryer, hydrocarbon, etc., and silicon dioxide (SiO ₂ ), which is a main component, is extremely chemically stable, and other than HF and strong alkali. It is insoluble in pharmaceuticals and has A-type and B-type depending on the aggregation state of colloidal particles of silica gel. Adsorption characteristics are chemical and physical adsorption. . It has high adsorption capacity and purity, no change in performance, high water resistance, which is an important characteristic for industrial use, low crushing rate when directly in contact with water and no change in performance after regeneration.

Ingredient Content

Item A type Type B SiO ₂ (wt%) Fe ₂ O ₂ (wt%) Al ₂ O ₃ (wt%) Na ₂ O (wt%) CaO (wt%) Less than 99.820.01 Less than 99.230.01 0.210.120.03

In the optical housing of the present invention, bolts and nuts are inserted into the flange face of the enclosure at regular intervals in order to join the upper and lower enclosures. In order to prevent the bolts and nuts which are coupled to the enclosures from being lost from the enclosure, they are lost. The bolts and nuts fastened to the enclosure are threaded only to a certain portion so that the enclosure can be separated without removing the bolts completely.The side flanges of the enclosure have protrusions and guide grooves for easy coupling of upper and lower enclosures. It is configured to.

In the optical housing of the present invention, for sealing the inlet and outlet of the cable, a rubber stopper is accommodated in the sock end of the enclosure, and the rubber stopper is responsible for two functions of sealing the enclosure and sealing the inlet and the outlet of the cable. In order to seal the enclosure, the plastic plug is inserted into the cable entry and exit port so that the entry and exit ports do not sit down so that the enclosure can be sealed regardless of whether the cable is pulled in or drawn out. In order to seal the cable, the cable entry and exit ports are protruded in a diagonal line with rubber plugs, and the appropriate position is cut with scissors, etc. according to the size of the cable. Then, the cable is inserted and the cable and the rubber plug are Sealing was ensured by being integral. Unlike the conventional method of forming the plug portion by using polyurethane grommets in the sealing method of the plug portion in which the cable is drawn in and drawn out, the plug is manufactured by using a rubber having high elasticity, so it is not elastic and hard. Only by supplementing the shortcomings of Grommet, which cannot maintain the sealing of cable entry and exit holes, it ensures its own airtightness and sealability without additional compound injection. In addition, the sealing of cable entry and exit holes can be secured without the use of sticky sealing tapes for the incoming and outgoing cables, making workability easier when installing the junction box or maintaining the connection points. By only allowing the plug to accommodate various sizes of cables, the number of parts of the product has been drastically reduced, and the problem of changing the sealing of cable entry and exit holes according to the function of the operator during construction has been solved. In addition, this method, which uses a high-resistance rubber stopper and separates the cable entry / exit port sealing function from the sealing function of the enclosure, gives a sealing function. There is an advantage that can be guaranteed for a long time because it does not receive the seal.

In the method for protecting the connection point of the optical fiber in the optical box of the present invention, unlike the conventional method that requires a separate internal structure according to the type of connector, a groove for storing the connector for protecting the connection point in the middle of the tray to accommodate a variety of connectors In order to prevent the connector from coming off the side at the end of the storage groove to form a protruding round to prevent the connector from coming off to the side, to accommodate the connector of various sizes and to prevent these connectors from being separated up and down In order to have a structure that the rubber plate is coupled to the storage groove.

Hereinafter, with reference to the accompanying drawings the technical configuration of the present invention will be described in detail.

1 is a perspective view of an optical splice enclosure of the present invention, FIG. 2 is an assembly view of the optical splice enclosure of the present invention, FIG. 3 is a plan view of the optical splice enclosure of the present invention, and FIG. 4 is a sectional view of the optical splice enclosure of the present invention. 5 is a perspective view of an inner tray of the present invention, FIG. 6 is a moisture sensing sensor of the optical connection enclosure of the present invention, FIG. 7 is a perspective view of a plug of the cable entry and exit section of the present invention, and FIG. 8A is a top and bottom enclosure of the optical connection enclosure of the present invention. Figure 8b is a state before assembling, Figure 8b is a state after assembling the upper and lower housings of the optical connection enclosure of the present invention, Figure 9 is a perspective view of the cable protection tube departure prevention jaw of the present invention, Figure 10 is a side view of the tray of the present invention, Enclosure (1), lower enclosure (2), air injection valve (3), bolt nut coupling part (4), moisture detection sensor inlet (5), moisture detection sensor fixing part (6), cable inlet outlet (7), Guide groove (8), guide jaw (9), housing fastening groove (10), moisture sensor (11), rubber stopper (12), plug (13), ground terminal (14), cylindrical Support 15, the semi-cylindrical hinge 16, the rubber plate 17, the upper deviation preventing fence 18, the axial deviation preventing fence 19, the cylinder 20, the protective tube in the inlet and outlet (21). Drum (22), connector storage (23), connector storage guide jaw (24), tray (25), bolt (26), nut (27), guide rib (28), cable fixing device (29) , Ribs 30, tension wire fixing device 31, approved wire fixing device 32, optical fiber alignment device 33, optical fiber upper separation barrier 34, rubber plate fixing wall 35, acrylic tube 36, O It can be seen that the ring gasket 37, the blue gel 38 and the air hole 39 are shown.

Looking at the coupling state of the connection enclosure of the present invention as shown in Figures 1 and 2, the upper and lower compartments (1, 2) divided into the upper and lower parts to protect the components mounted therein from the external environment, the fastening for fastening the enclosure Groove (10), rubber stopper (12) for sealing the enclosure, air injection valve (3), bolt nut coupling part (4), moisture sensor inlet (5), moisture sensor fixing part (6), optical fiber It consists of a tray (25) for storing and aligning connection points, a cable inlet and outlet (7) for fixing cables, and a moisture detection sensor (11) for checking the presence of moisture infiltration.

The enclosures 1 and 2 are provided with grooves of an appropriate size in the flange so that the side gaskets can be inserted into the parts of the enclosure where the upper and lower enclosures come into contact with each other, and the stopper of the enclosure is suitable for placing the rubber stopper 12. The space of size, ie, the rubber plug 12, has a recess.

The connection enclosure is formed with a plurality of cable inlet, outlet 7 so that the cable can be easily drawn in, drawn out and branched, the housing coupling groove 10 that can be coupled to the upper and lower housing on the flange surface of the housing at regular intervals As shown in Fig. 8, a nut 27 for assembling the bolt 26 is inserted in these grooves. In order to prevent the bolt 26 and the nut 27 coupling these enclosures from being screwed away from the enclosure, only a portion of the bolts and nuts 27 fastened to the enclosure are threaded to completely bolt the bolt 26. The enclosure was allowed to separate without being separated. In addition, the guide jaw 9 and the guide groove 8 are configured on the side flange of the enclosure to facilitate coupling of the upper and lower enclosures 1 and 2.

In addition, the upper housing (1) has a moisture detection sensor inlet (5) and a moisture detection sensor fixing part (6) as shown in Figures 4 and 6 so that the moisture detection device can be mounted to absorb and check the moisture generated inside the assembly. Loosen the bolt of the fixing part 6 and check it. A blue gel 38 is embedded in the acrylic tube 36. An air hole 39 is formed under the moisture detection sensor, and an O-ring gasket. It is fixed to the upper housing by (37), the side of the upper housing (1) is equipped with an air injection valve (3) for injecting air, the lower housing (2) to protect the line from lightning An optical cable and a ground terminal 14 which can be grounded are mounted as shown in FIG.

FIG. 7 shows the cable entry and exit 7 in detail, wherein the rubber stopper 12 inserted into the seating groove of the rubber stopper 12 of the housing 1 and 2 includes at least one cable for the entry, withdrawal and branching of the cable. It has an inlet and an outlet groove, and these grooves form a long diagonal line in the longitudinal direction of the groove to accommodate cables of various sizes, and grooves on the outside of these grooves so that they can be cut to fit the size of the cable that is drawn in or drawn out. The size of the cable inlet and outlet (7) can be used in both directions can be used in the normal wet flooded areas can be filled with a waterproofing agent, such as silicon, and the inlet and out to maximize the sealing between the cable and the groove Guide ribs 28 are formed on the outside of the groove to fasten the hose clip or tie band.

At the beginning of these grooves, a plug 13 made of hard plastic or metal is fitted for sealing between the enclosure and the rubber stopper 12.

5 shows a tray 25 for fixing a cable inside an optical splice enclosure, in which a cable is seated on the tray 25 and a cable is fixed on the tray 25 using a hose clamp. The fixing device 29 has a U-shaped rib 30 formed at a portion where the cable is fixed in order to minimize the influence of the cable bending. In addition, a tension line fixing device 31 is attached to the middle of the inside of the enclosure, and the device has a tray fixing part and a tension line fixing part 32.

The tray 25 mounted inside the optical splice enclosure is composed of an optical fiber inlet portion, an optical fiber alignment portion 33, a connector storage portion, and white paper portions 15 and 16 that can stack the tray 25. In the optical fiber lead-in portion, when the protective tube is drawn in, the separation stop 34 is formed at the upper end thereof so as not to be separated without using the tie band. The optical fiber alignment unit 33 has two semi-circular drums 22 formed on both sides of the bottom of the tray so that the optical fiber always maintains a curvature of 35 mm or more, and the tray 25 to prevent the optical fiber from escaping to the upper end thereof. Several jaws are formed on the side wall of the. In addition, the splice storage unit 23 is formed at the center of the tray 25, and several spherical storage units (grooves) 23 are formed so as to separately store splices, and the splice storage guides are formed at both ends of the grooves. Round pillars are formed to prevent the jaws 24 from deviating from side to side, and a rubber plate fixing wall 35 is formed at the center to fit the rubber plate 17. The white paper sections 15 and 16 capable of stacking the trays 25 have two cylinders 20 formed at the bottom of one side wall of the tray and two hinges at which the cylinders 20 can be fitted. Grooves 15 and 16 are formed, and these hinge grooves 15 and 16 have a specific portion open in one groove in the orthogonal direction of the groove in order to facilitate the separation of the tray 25.

The junction box of the present invention can confirm the presence of moisture inside the enclosure without opening the enclosure completely, simplifying the work during maintenance, and can ensure perfect reliability by simple regular maintenance of the track, The bolts and nuts used for fixing are formed only a certain portion of the bolts so that the bolts are not completely detached from the enclosure during maintenance of the enclosure to minimize the risk of bolt loss. In addition, the junction box according to the present invention uses a rubber stopper using a high elastic rubber material without a separate injection molding on the side where the cable is drawn in and drawn out, without using a sealing tape, which is inconvenient to work, so that cable entry and withdrawal holes can be used. ) Can be secured by anyone of ordinary skill in the art can be easily secured construction and sealing. In addition, the length of the cable is drawn in and out to form a diagonal line in the longitudinal direction, so that it is easy to cope with various sizes of cables, and the parts used are drastically reduced, so it is very economical, and the external environment, especially temperature, bending, Regardless of the change in the torsion, there is an effect of ensuring the sealing property of the lead-out and lead-out.

The tray used in the junction box of the present invention can accommodate all of the various connectors without any change in structure, and can be easily applied to any connector without being affected by a specific connector, thereby simplifying the standard in this field, and reducing the number of parts. It can be reduced, and if necessary, several different types of connectors can be accommodated in one tray, so the application is wide and the economic effect is very large.

Claims (8)

In the junction box for protecting the connection point of the communication cable, the enclosure is divided into upper and lower parts (1, 2), the moisture sensor (11) for distinguishing the change in color according to the moisture content of the inside of the enclosure, and the upper and lower parts The bolts 26 fixing the housings 1 and 2 can be completely separated from the upper and lower housings 1 and 2 without completely leaving the upper housing 1, and the cable is not used without the sealing material. Water, characterized in that it comprises a rubber stopper (12) capable of sealing cable entry and exit ports regardless of the outer diameter, and a tray (25) that can be aligned regardless of the type of connector protecting the connection point of the optical fiber. Optical junction box to detect penetration. The water sensor (11) according to claim 1, wherein the water sensor (11) is composed of an indicator blue gel (38), an O-ring gasket (37), and an air hole (39) at the bottom thereof. Optical connection enclosure that can detect moisture penetration, characterized in that the removable structure from the outside of the enclosure. According to claim 1, wherein the structure of the bolt 26 for fixing the upper and lower enclosures (1, 2) has a thread formed on the lower portion, and a predetermined portion of the bolt 26 is not formed thereon, the thread is formed The bolt 26 and the nut 27 formed with the outer diameter of the part not equal to or smaller than the corrugated diameter of the thread, and the nut 27 have a thread formed on the lower portion thereof, and a predetermined portion does not have a thread formed thereon. Optical connection enclosure, characterized in that the inner diameter of the portion that is not formed, including the diameter of the thread and the nut (27) formed large. The rubber plug 12 has a cable inlet / outlet 7 that protrudes separately for sealing the optical cable inlet / outlet 7 and the protrusion is oblique in the longitudinal direction. A plug 13 having a groove formed therein and having a rigid structure is inserted into a portion at which the cable entry / exit 7 starts, and the cable entry / exit can be fastened with a tie band or a metal clip to the outside. It is possible to use in both directions, and the optical junction box, characterized in that the structure can be used by charging treatment with a waterproofing agent such as silicon in the constant inundation area. According to claim 1, The tray 25 has a semi-circular drum (20) in order to maintain the proper radius of curvature of the optical fiber, the center portion can accommodate all the heat shrink sleeve, mechanical connector, heat shrink sleeve, etc. for the ribbon There is a connector storage groove, the optical junction box characterized in that the rubber plate 12 is fitted into the storage groove. 6. The optical junction box according to claim 5, wherein the tray (25) has a protruding rib structure at the sidewall and the upper end of the sidewall so that the protection tube can be fixed to the portion into which the optical fiber is introduced. 6. The tray according to claim 5, wherein the tray has two cylinders 20 on one side wall of the tray and grooves for fitting the cylinders 20 to the upper end thereof in order to stack several trays. One side is characterized in that it comprises a white paper open in the orthogonal direction of the groove to facilitate the stacking and separation of the tray (25). 6. The tray 25 according to claim 5, wherein the tray 25 comprises a connector storage groove having a round pillar formed at the end of the side wall of the storage groove to prevent the connector protecting the connection portion of the optical fiber from being separated in the longitudinal direction. Optical splice enclosure.