CN207896640U - The end connection component of built-in fiber cable - Google Patents

Abstract

The utility model discloses a kind of end connection component of built-in fiber cable, wherein the end connection component of built-in fiber cable includes：Cable, including outer quilt, conductor and the optical fiber for being built in the conductor；And connecting terminal, wire connecting portion including socket part and set on described socket part one end, end face of the socket part far from the wire connecting portion offers sleeve joint hole, the sleeve joint hole with the exposed junction of the conductor being fixedly attached, the wall surface of the sleeve joint hole offers fairlead along the depth direction of the sleeve joint hole, and the fairlead is drawn with for the optical fiber.The end connection component connecting terminal of the utility model built-in fiber cable is fixed by socket with cable conductor, and the fairlead that optical fiber directly extends from the depth direction along sleeve joint hole is drawn, and optical fiber is not easily susceptible to squeeze and draw securely and reliably.

Description

End connection assemblies for built-in fiber optic cables

technical field

The utility model relates to the technical field of cable connection, in particular to an end connection component with a built-in optical fiber cable.

Background technique

When the outer insulating layer of the built-in fiber optic cable is thicker, in the existing connection structure at the end of the built-in fiber optic cable, the connection terminal is often directly crimped with the cable conductor, but the crimping is easy to cause damage to the optical fiber. In order to solve this problem, an existing way is to protect the built-in optical fiber from being damaged by crimping by adding a fiber protection tube, but when the outer diameter of the conductor is small, there is not enough space to place the fiber protection tube, even in the process It is also realized that the protection tube is also difficult to resist the stress during crimping, so as to ensure the safe and reliable extraction of the optical fiber.

Utility model content

The main purpose of this utility model is to propose a terminal connection assembly of a built-in optical fiber cable, aiming at solving the technical problem that the existing terminal connection structure of a built-in optical fiber cable cannot ensure safe and reliable extraction of optical fibers when the cross-section of the conductor is small.

In order to achieve the above purpose, the terminal connection assembly of the built-in optical fiber cable proposed by the utility model includes:

cables, including outer insulation, conductors and optical fibers embedded in said conductors; and

The connection terminal includes a socket part and a connection part provided at one end of the socket part, and a socket hole is opened on the end surface of the socket part far away from the connection part, and the socket hole is used for connecting with the conductor. The exposed end is fixedly socketed, and the bottom wall of the socket hole is provided with a lead-out hole along the depth direction of the socket hole, and the lead-out hole is used for leading out the optical fiber.

Preferably, the side wall of the socket hole is provided with a fixing hole, and the terminal connection assembly of the built-in optical fiber cable further includes a fastener fixed in the fixing hole and tightly fitted with the conductor.

Preferably, the fastener is screwed into the fixing hole.

Preferably, the terminal connection assembly of the built-in optical fiber cable further includes a pressure equalizing sleeve, the pressure equalizing sleeve is embedded in the socket hole and sleeved on the periphery of the conductor, and the fastener and the The outer wall of the pressure equalizing sleeve is tightly fitted.

Preferably, the socket part is in the shape of a tube.

Preferably, the terminal connection assembly of the built-in optical fiber cable further includes a lead-out tube, one end of the lead-out tube is sealed and embedded in the lead-out hole, and the other end protrudes from the surface of the sleeve part close to the connection part; The optical fiber is built in the lead-out tube and drawn out from the lead-out tube.

Preferably, the outlet pipe is screwed into the outlet hole.

Preferably, the terminal connection assembly of the built-in optical fiber cable further includes a first protection tube, the first protection tube is sleeved on the end of the lead-out tube away from the socket part, and the outer circumference of the first protection tube A plurality of sheds are arranged on the surface, and the plurality of sheds are arranged at intervals along the length direction of the first protection tube, and a section of the optical fiber led out from the lead-out tube is accommodated in the first protection tube.

Preferably, the cable includes an armor layer, and the armor layer is placed on the periphery of the optical fiber and between the optical fiber and the conductor; the end connection assembly of the built-in optical fiber cable also includes a second protective tube, The second protection tube is embedded in the lead-out tube and is located between the lead-out tube and the optical fiber.

Preferably, the wiring part is in the shape of a plate, and the wiring part is formed by extending from the connection between the peripheral surface of the socket part and the end surface of the socket part along the depth direction of the socket hole. There are wiring holes on the part.

The terminal connection assembly of the built-in optical fiber cable of the utility model is fixed by socketing the terminal and the cable conductor, and the optical fiber is directly drawn out from the lead-out hole. The radial stress borne by the cable conductor is small, and the optical fiber placed in the conductor will not be squeezed. , thus ensuring the safe and reliable lead-out of the optical fiber.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the present utility model, and those skilled in the art can also obtain other drawings according to the structures shown in these drawings without creative work.

Fig. 1 is a schematic cross-sectional structure diagram of an embodiment of an end connection assembly with a built-in optical fiber cable of the present invention;

Fig. 2 is a partial enlarged view of place A in Fig. 1;

Fig. 3 is a schematic structural diagram of the cable in Fig. 1;

Fig. 4 is a schematic structural diagram of the terminal block in Fig. 1;

Fig. 5 is a schematic diagram of the assembly steps of connecting the cable conductor and the pressure equalizing sleeve in the terminal connection method of the built-in optical fiber cable of the present invention;

Fig. 6 is a schematic diagram of the assembly steps of the cable optical fiber, the second protective tube and the connection terminal after the step in Fig. 5;

7 is a schematic diagram of the assembly steps of the terminal, the lead-out tube and the first protection tube after the steps in FIG. 6;

Fig. 8 is a structural schematic diagram of the first embodiment of the end connection method of the built-in optical fiber cable of the present invention;

FIG. 9 is a schematic structural view of the second embodiment of the end connection method of the built-in optical fiber cable of the present invention.

Explanation of reference numbers:

label name label name label name 1 cable twenty one Socket 3 Pressure equalizing bushing 11 outer insulation 211 socket hole 4 Outlet tube 12 conductor 212 Lead hole 5 first protective tube 13 optical fiber 213 Fixing hole 51 umbrella skirt 14 armor layer twenty two Wiring 6 Second protective tube 2 Terminals 221 wiring hole

The realization of the purpose of the utility model, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present utility model, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the relative positional relationship, movement conditions, etc. between the components shown in the figure below are changed, if the specific posture changes, the directional indication will also change accordingly.

In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. Implying their relative importance or implying the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist , also not within the scope of protection required by the utility model.

The utility model proposes a terminal connection assembly of a cable 1 with a built-in optical fiber 13 .

In the embodiment of the present utility model, as shown in Figures 1 to 4, the terminal connection assembly of the built-in optical fiber 13 cable 1 includes:

A cable 1 comprising an outer insulating layer 11, a conductor 12 and an optical fiber 13 embedded in the conductor 12; and

The connecting terminal 2 includes a socket part 21 and a connection part 22 arranged at one end of the socket part 21. The end surface of the socket part 21 away from the connection part 22 is provided with a socket hole 211. The socket hole 211 is used for exposing the conductor 12. The end is fixedly socketed, and the bottom wall of the socket hole 211 is provided with a lead hole 212 along the depth direction of the socket hole 211, and the lead hole 212 is used for the fiber 13 to lead out.

In this embodiment, the conductor 12 and the optical fiber 13 of the cable 1 can be stripped from the outer insulating layer 11 of the cable 1, and the cable 1 can also include a shielding layer in addition to the outer insulating layer 11, the conductor 12 and the optical fiber 13, such as As shown in the figure, only one conductor 12 is provided, but in other embodiments, multiple conductors 12 and optical fibers 13 of the cable 1 may be provided. The conductor 12 is mainly used to transmit electric energy, and the optical fiber 13 is used to transmit signals. Since the material of the optical fiber 13 is relatively brittle, so is the connecting portion of the two optical fibers 13, so the optical fiber 13 and its connecting portion need to be better protected. The connection terminal 2 is made of conductive metal. In this way, the electrical connection between the two cable conductors 12 can be realized after the socket part 21 of the connection terminal 2 is connected with the conductor 12 of the cable 1. The conductor 12 and the socket part 21 are generally made of copper. Made of material. Preferably, the socket part 21 is tubular. The connection between the socket portion 21 and the conductor 12 can be fixed by welding, tight fit, etc., but the tight fit in the radial direction needs to ensure that the optical fiber 13 is not damaged by pressure.

The end connection assembly of the cable 1 with the built-in optical fiber 13 of the utility model is fixed by socketing the terminal 2 and the conductor 12 of the cable 1, and the optical fiber 13 is directly drawn out from the lead-out hole 212, and the radial stress borne by the conductor 12 of the cable 1 is small, and will not damage the cable. The optical fiber 13 placed in the conductor 12 is squeezed, thereby ensuring safe and reliable extraction of the optical fiber 13 .

Further, a fixing hole 213 is opened on the side wall of the sleeve hole 211 , and the end connection assembly of the cable 1 with the built-in optical fiber 13 also includes a fastener (not shown) fixed in the fixing hole 213 and closely matched with the conductor 12 .

In this embodiment, compared with the traditional crimping method, by reasonably controlling the depth of the fastener screwed into the fixing hole 213, the reliable connection between the conductor 12 and the terminal 2 can be ensured, and the optical fiber 13 can not be damaged. . The fastener can be screwed or riveted in the fixing hole 213 to press the conductor 12 onto the inner wall surface of the socket portion 21 to ensure an effective electrical contact area. Preferably, the fastener is threadedly engaged with the fixing hole 213 . When the fastener is a screw, in order to ensure the pressing force and facilitate the turning of the screw, the end surface of the screw is smoothed and flattened. The screw can be self-breaking by pre-tightening force, that is, when the applied force reaches the preset torque, the screw breaks at the preset position, thereby ensuring the force to compress the conductor 12, so that the reliable connection of the cable 1 conductor 12 can be realized , and it can be done without damaging the optical fiber 13 inside the conductor 12.

In order to cooperate with pre-tightening force self-breaking screws, when the sleeve part 21 is tubular, its length and wall thickness can be appropriately lengthened and reduced according to different types of cables 1. The wall thickness of the central portion of the portion 21 is set to be larger than 10 mm. In addition, in order to ensure the connection strength between the socket portion 21 and the conductor 12 , the socket portion 21 is provided with a plurality of fixing holes 213 corresponding to each cable 1 . At the same time, in order to provide sufficient carrying capacity for current transmission, the plurality of fixing holes 213 are arranged axially staggered. In addition, in order to form a self-locking structure, among the plurality of fixing holes 213 corresponding to a cable 1, the axial direction of some of the fixing holes 213 passes through the axis of the sleeve part 21, and the axial direction of the other part of the fixing holes 213 deviates from the axis of the sleeve part 21. Towards.

Further, the terminal connection assembly of the cable 1 with built-in optical fiber 13 also includes a pressure equalizing sleeve 3, which is embedded in the sleeve hole 211 and sleeved on the periphery of the conductor 12, and the fastener and the pressure equalizing sleeve 3 Tight fit on the outer wall.

In this embodiment, by providing the pressure equalizing sleeve 3 , the pressure loss of the optical fiber 13 placed inside the conductor 12 can be avoided due to too concentrated force of the fastener. It can be understood that the socket part 21 is also made of conductive metal material, and preferably, the material of the socket part 21 is copper.

Further, the end connection assembly of the cable 1 with the built-in optical fiber 13 also includes a lead-out tube 4, one end of the lead-out tube 4 is sealed and embedded in the lead-out hole 212, and the other end protrudes from the surface of the sleeve part 21 close to the connection part 22; the optical fiber 13 is built into the lead-out Pipe 4, and lead out from the outlet pipe 4.

In this embodiment, the sealing and waterproof performance of the optical fiber 13 can be enhanced by providing the lead-out tube 4 , that is, to prevent external water from entering the cable 1 from the wall of the lead-out hole 212 . Preferably, the outlet pipe 4 is screwed into the outlet hole 212 .

Further, the terminal connection assembly of the cable 1 with the built-in optical fiber 13 also includes a first protection tube 5, which is sleeved on the end of the outlet tube 4 away from the sleeve portion 21, and the outer peripheral surface of the first protection tube 5 is protruded. A plurality of sheds 51 are arranged at intervals along the length direction of the first protection tube 5 , and a section of the optical fiber 13 drawn out from the lead-out tube 4 is accommodated in the first protection tube 5 .

In this embodiment, the sealing and waterproof performance of the optical fiber 13 can be further enhanced by arranging the first protection tube 5 , and the performance of the outer insulating layer can be enhanced by arranging the shed 51 on the first protection tube 5 . The first protection tube 5 can be made of cold-shrinkable or heat-shrinkable material, so that when it is connected with the lead-out tube 4, it can be easily shrunk and sleeved on the lead-out tube 4 to ensure the sealing of the connection. Preferably, when the outlet pipe 4 is threadedly matched with the outlet hole 212, the outer diameter of the threaded part of the outlet pipe 4 is larger than the outer diameter of the part connected to the first protection tube 5, and the length of the threaded part is not less than 10mm, which is the same as The length of the connecting part of the first protective tube 5 is not less than 20mm

Further, the cable 1 includes an armor layer 14, and the armor layer 14 is placed on the periphery of the optical fiber 13 and between the optical fiber 13 and the conductor 12; the end connection assembly of the cable 1 with the built-in optical fiber 13 also includes a second protective tube 6, the first Two protection tubes 6 are embedded in the lead-out tube 4 and located between the lead-out tube 4 and the optical fiber 13 .

In this embodiment, the anti-extrusion effect of the optical fiber 13 can be further enhanced by providing the armor layer 14, preferably, the material of the armor layer 14 is steel. By setting the second protection tube 6, the outgoing optical fiber 13 can be protected from being scratched or bumped by components such as the outgoing tube 4 during installation. Preferably, the second protection tube 6 can be made of plastic or rubber.

Further, the connection part 22 is plate-shaped, and the connection part 22 extends from the connection between the peripheral surface of the socket part 21 and the end surface of the socket part 21 along the depth direction of the socket hole 211, and a connection hole is opened on the connection part 22 221.

In this embodiment, the side surface of the connection part 22 adjacent to the surrounding surface of the sleeve part 21 can be attached to the external support surface so that the fixing and/or wiring of the connection terminal 2 can be facilitated. If only fixing is required, it is used as an example. , can also use screws to pass through the wiring holes 221 and be fixed on the external support. If wiring is required, the wire core can be wound on the screw shank, and the screw head can be pressed against the side of the wiring part 22 adjacent to the end surface of the sleeve part 21 .

The utility model also proposes a terminal connection assembly with a built-in optical fiber cable. During installation, the method steps shown in Fig. 5 to Fig. 9 can be referred to. In the first embodiment, the method includes the following steps:

Step 100: Stripping off the conductor 12 and the optical fiber 13 at one end of the cable 1;

This step can be completed by machine or manually after the cable 1 is produced, or it can be completed at the production stage.

Step 200: Pass the optical fiber 13 through the sleeve hole 211 on the connection terminal 2 and lead it out from the lead-out hole 212;

It can be understood that in this step, in order to achieve a corresponding assembly effect, the optical fiber 13 and the connecting terminal 2 can move relatively, either the optical fiber 13 can be passed on the connecting terminal 2, or the connecting terminal 2 can be put on the optical fiber 13, or both at the same time.

Step 300 : Fix and socket the end of the conductor 12 with the socket hole 211 .

In this step, it can be understood that the conductor 12 can be tightly fitted with the socket hole 211 to achieve a fixed socket, and the conductor 12 can also be closely matched with the socket hole 211 to achieve a fixed socket by direct welding or soldering, and then Alternatively, the conductor 12 can be fixedly socketed with the socket hole 211 through a third component, such as a screw hole communicated with the socket hole 211 provided on the socket part 21, and the screw hole is threadedly fitted by setting a fastener and It is tightly pressed against the outer wall surface of the conductor 12, thereby realizing electrical contact between the conductor 12 and the wall surface of the socket hole 211.

Further, the terminal connection assembly of the cable 1 with the built-in optical fiber 13 also includes a lead-out tube 4, a first protective tube 5, an armor layer 14, a second protective tube 6, a pressure equalizing sleeve 3 and fasteners, and socket holes 211 The side wall is provided with a fixing hole 213;

As shown in step 100', step 100 specifically includes: peeling off the outer insulating layer 11 at one end of the cable 1 to expose the conductor 12, and cutting off a section of the conductor 12 exposed on the outer insulating layer 11 to expose the armor layer built in the conductor 12 14, and further cut off a section of armor layer 14 to expose the optical fiber 13;

As shown in step 200', step 200 specifically includes: placing the second protective tube 6 on the optical fiber 13 and leading it out from the lead-out hole 212 along with the optical fiber 13;

Between step 100 and step 200 or between step 200 and step 300 also includes: step 110: putting the pressure equalizing sleeve 3 on the exposed conductor 12;

As shown in step 300', step 300 specifically includes: embedding the pressure equalizing sleeve 3 in the sleeve hole 211 and sleeved on the periphery of the conductor 12, then screwing the fastener into the fixing hole 213 and pressing the pressure equalizing sleeve tube 3;

After step 300, step S400 is also included: placing the lead-out tube 4 on the periphery of the second protection tube 6 and sealingly connected with the lead-out hole 212, and then putting the first protection tube 5 on the second protection tube 6 and exposing it to the lead-out tube 4 and socketed with the end of the outlet pipe 4 away from the socket portion 21.

The above is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. Under the utility model concept of the utility model, the equivalent structural transformation made by using the specification of the utility model and the contents of the accompanying drawings, Or directly/indirectly used in other relevant technical fields are all included in the patent protection scope of the present utility model.

Claims (10)

1. a kind of end connection component of built-in fiber cable, which is characterized in that including：

Cable, including external insulation layer, conductor and the optical fiber for being built in the conductor；And

Connecting terminal, including socket part and the wire connecting portion set on described socket part one end, the socket part is far from the wire connecting portion End face offer sleeve joint hole, the sleeve joint hole with the exposed junction of the conductor to be fixedly attached, the bottom wall of the sleeve joint hole Face offers fairlead along the depth direction of the sleeve joint hole, and the fairlead is drawn with for the optical fiber.

2. the end connection component of built-in fiber cable as described in claim 1, which is characterized in that the side wall of the sleeve joint hole Mounting hole is offered, the end connection component of the built-in fiber cable further includes being fixed at the mounting hole and being led with described The fastener of body tight fit.

3. the end connection component of built-in fiber cable as claimed in claim 2, which is characterized in that the fastener with it is described Mounting hole screw-thread fit.

4. the end connection component of built-in fiber cable as claimed in claim 2 or claim 3, which is characterized in that the built-in fiber The end connection component of cable further includes equal pressing sleeve pipe, and the equal pressing sleeve pipe is coated on the periphery of the conductor and with the conductor Embedded at the sleeve joint hole, the outside wall surface tight fit of the fastener and the equal pressing sleeve pipe.

5. the end connection component of built-in fiber cable as claimed in claim 4, which is characterized in that the socket part is in pipe Shape.

6. the end connection component of built-in fiber cable as described in claim 1, which is characterized in that further include be placed on it is described Fairlead on optical fiber, the optical fiber are drawn from the fairlead, and fairlead one end sealing is embedded at the fairlead, separately The socket part is protruded close to the surface of the wire connecting portion in one end.

7. the end connection component of built-in fiber cable as claimed in claim 6, which is characterized in that the fairlead with it is described Fairlead screw-thread fit.

8. the end connection component of built-in fiber cable as claimed in claim 6, which is characterized in that further include the first protection Pipe, first protection pipe are made of isolation material, and first protection pipe is socketed on the separate socket of the fairlead The peripheral surface of the one end in portion, first protection pipe is provided with multiple full skirts, length of multiple full skirts along first protection pipe Direction interval is arranged, and draw from the fairlead one section of the optical fiber is contained in first protection pipe.

9. the end connection component of built-in fiber cable as claimed in claim 8, which is characterized in that the cable further includes armour Layer is filled, the armor is placed on the periphery of the optical fiber and between the optical fiber and conductor；The built-in fiber cable End connection component further include the second protection pipe, second protection pipe embedded at the fairlead and be located at the fairlead Between optical fiber.

10. the end connection component of built-in fiber cable as described in claim 1, which is characterized in that the wire connecting portion is in plate Shape, the wire connecting portion is from the junction of the circumferential surface of the socket part Yu the end face of the socket part along the depth side of the sleeve joint hole To extending to form, wiring hole is offered in the wire connecting portion.