CN117170052A - Optical fiber cluster type carbon fiber core wire optical fiber extraction structure assembly and extraction method - Google Patents

Abstract

The application provides an optical fiber extraction structure assembly and an extraction method for an optical fiber cluster type carbon fiber core wire, and belongs to the technical field of overhead transmission line hardware fittings. The lead-out structure assembly comprises a strain clamp, a tension reinforcing component and a protection component. The optical fiber cluster type carbon fiber core lead optical fiber lead-out structure assembly and the lead-out method provided by the application are simple to operate, can avoid the problem that the lead-out position of the lead optical fiber is overlarge in bending degree in the lead-out process, can also effectively protect the junction position, avoid the problem that the optical cable optical fiber or the lead optical fiber is stretched or bent and broken, and ensure the safety of the installation operation and the reliability in the use process.

Description

Optical fiber cluster type carbon fiber core wire optical fiber extraction structure assembly and extraction method

Technical Field

The application belongs to the technical field of overhead transmission line hardware fittings, and particularly relates to an optical fiber lead-out structure assembly and a lead-out method for an optical fiber bunched carbon fiber core wire.

Background

With the development of society, the electricity consumption is rapidly increased, and the transmission capacity of some early-stage built transmission lines cannot meet the increasing electricity consumption requirement and are subjected to capacity increasing transformation, but the establishment of a new line transmission corridor is more and more difficult due to the influence of various factors, and the construction time is long and the cost is high. Therefore, the capacity-increasing transformation is a necessary choice by adopting new technology, materials and technology and replacing wires on the basis of the original electric power facilities.

The power transmission wire mainly comprises an aluminum conductor on the outer layer of the wire and a wire core in the wire, wherein the aluminum conductor mainly plays a role in conveying load, and the wire core mainly plays a role in mechanical support. The transmission capacity of the transmission wire is determined by various factors such as the conductivity (IACS) of the aluminum conductor, the heat-resistant characteristic (sag) of the wire, the loss (including resistance and reactance) of the wire and the like, wherein the carbon fiber composite core has the characteristics of light weight, high mechanical strength, small sag, large current-carrying capacity, small thermal expansion coefficient, energy conservation, consumption reduction and the like, and has the incomparable advantages of other types of wires in the aspects of increasing the transmission capacity of the wire, reducing sag, reducing line loss, improving the wind resistance of the wire and the like, and is used as a superconducting wire in the industry. The carbon fiber composite core is adopted for capacity increasing transformation, so that on one hand, the original line tower resources can be fully utilized, on the other hand, the transmission capacity of the transmission line can be greatly improved, and the situations of fast load increase and shortage of transmission corridor resources can be effectively solved.

However, the wire core of the carbon fiber composite core wire is made of carbon fiber impregnated resin, the wire core is low in elongation rate, limited in bending radius and incapable of being bent at an acute angle, the wire core is easy to damage in the construction process, the damaged problems of strand scattering, lantern lifting, core pulling and the like of the carbon fiber composite core wire are caused, even the core rod is broken, the core rod is coated in an aluminum conductor, the core rod is damaged to be a hidden defect, once the wire core is generated, the carbon fiber composite core wire runs with diseases, and finally, the broken line accident of a power transmission line is caused, so that the serious threat is formed to the safe operation of a power grid and the safety of personnel, lives and property. Therefore, the nondestructive detection technology of the defects of the carbon fiber composite core wires, particularly the nondestructive detection technology of the carbon fiber composite core during the construction process, is always one of research hot spots in the field.

The existing nondestructive detection modes for the carbon fiber composite material mainly comprise infrared, vortex, ultrasonic, acoustic emission, X-ray and the like. For a conventional steel-cored aluminum stranded wire, an eddy current detection principle and a magnetic leakage detection principle can be used for respectively detecting the damage condition of the aluminum stranded wire and the steel core of the wire, but because the carbon fiber composite material is non-magnetic, the methods of magnetic leakage detection, metal magnetic memory detection and the like cannot be adopted. The X-ray real-time imaging technology is adopted, so that the transillumination direction of rays is vertical to the tangential direction of the core rod, most interface defects can be detected when the wire rotates, products can be detected on line in real time at any position and at any rotation angle, the detected images have higher definition and sensitivity, but the detection sensitivity of the X-ray detection method to cracks on the surface or in the carbon fiber wire is lower, the shot images are more fuzzy, the contrast of defective parts in the formed images is seriously insufficient, and due to the fact that a transmission line is very long, the wire on-line detection needs to identify a large number of pictures, the omission is very easy to be caused by personnel fatigue, and the feasibility of field application is not high. The laser ultrasonic method is characterized in that a thermal characteristic area is generated on the solid surface by utilizing the instantaneous thermal action of high-energy laser pulse and the surface of a substance to form thermal stress, so that ultrasonic waves are generated in the object, but the length of a power transmission wire is hundreds of meters to thousands of meters, a defect signal is attenuated, the surface of the power transmission wire is not smooth, and the sound wave divergence is large, so that the ultrasonic detection method is only suitable for short-distance damage detection of a carbon fiber composite core rod. According to the structure of the carbon fiber composite wire, the glass fiber of the core rod separates the carbon fiber bundles from the aluminum stranded wires, so that the carbon fiber bundles can be electrified and heated independently, then the carbon fiber bundles are detected by an infrared thermal imager, defects on the surface of an object or a material are detected by utilizing the radiation of the object, and the defects such as holes, cracks and uneven thickness can be formed in the process of manufacturing due to the impact, the defects cause uneven heat transfer, the defects are different in temperature and are displayed on an oscilloscope or a computer display screen after being processed, the temperature of the defect is higher, but the carbon fiber core rod can only be detected after being sampled by utilizing an infrared technology, so that the practical on-line nondestructive detection of the carbon fiber composite wire cannot be realized.

Therefore, the conventional nondestructive detection methods have obvious detection limitations, so that the practicability is not high. In order to solve the problem of practicality, a carbon fiber composite wire embedded with an optical fiber is generated, and the wire can inject detection light pulses into a sensing optical fiber by utilizing the principle of an Optical Time Domain Reflectometer (OTDR), and the pulse light generates backward scattered light when propagating in the optical fiber. The nondestructive testing mode based on the wire structure is not limited by the length of the wire, the detection accuracy is high, and the use limit of the traditional testing mode is effectively broken through. In addition, the optical fiber implanted in the optical fiber lead can analyze various line working condition information, and the whole line is communicated, so that the optical fiber lead has very practical requirements.

In the whole path architecture of the transmission line, there are erection scenes such as corner strain towers, tangent towers, terminal towers and intermediate connection, in these scenes, it is often necessary to fix broken wires on strain insulator strings on two sides of the tower respectively by strain clamps, so as to play a role of anchoring, and then, connect the broken wires on the tower through jumper wires. The existing strain clamp is generally only suitable for the extraction and connection of the traditional lead wires, is not suitable for the carbon fiber composite core lead wires embedded with optical fibers, is very difficult to realize the extraction operation of the optical fibers, and is easy to cause the conditions of overlarge bending degrees such as small-radius bending, acute-angle bending and the like of the optical fibers at the extraction positions, so that the optical fibers are extremely easy to break, and the detection is disabled; in addition, the optical fiber is required to be connected with the optical fiber of the external optical cable after being led out, and the existing leading-out structure cannot effectively protect the optical fiber due to the fact that the optical fiber is fragile in the connection position, and the problem of premature failure of the optical fiber is easily caused.

Disclosure of Invention

The embodiment of the application provides an optical fiber lead-out structure assembly and a lead-out method of an optical fiber cluster type carbon fiber core lead wire, which aim to solve the problems that the lead-out operation of an optical fiber is very difficult, the lead-out optical fiber is easy to bend too much, and a splicing area cannot be effectively protected, so that the optical fiber is easy to break.

In order to achieve the above purpose, the application adopts the following technical scheme:

in a first aspect, an optical fiber cluster carbon fiber core wire optical fiber pigtail structure assembly is provided, comprising:

strain clamp, tension reinforcing component and protection component; a channel penetrating along a straight path is formed inside the strain clamp; one end of the tension reinforcing component is connected with a core rod led out from the leading-out end of the channel, the other end of the tension reinforcing component is connected with an external optical cable, an exposed optical cable optical fiber in the optical cable and an exposed lead optical fiber in the lead are welded to form an exposed continuous optical fiber section, and the length of the tension reinforcing component is smaller than that of the continuous optical fiber section; the protective component is provided with an inner protective layer and an outer protective layer; the inner protective layer is an elastic layer, is sleeved on the periphery of the core rod bundle, the tension reinforcing component and the optical cable, and is connected with the strain clamp; the outer protective layer is a corrugated pipe, is sleeved on the periphery of the inner protective layer and is connected with the strain clamp.

With reference to the first aspect, in one possible implementation manner, the protection assembly further includes an inner protection layer, where the inner protection layer is an elastic layer, and is sleeved on the core rod bundle, the tension reinforcing component, and the outer periphery of the optical cable, one end of the inner protection layer is connected with the strain clamp, the other end is connected with the optical cable, and the outer protection layer is sleeved on the outer periphery of the inner protection layer.

With reference to the first aspect, in one possible implementation manner, the inner protective layer is filled with a buffer glue, a gap is formed between the outer protective layer and the inner protective layer, and the gap is filled with the buffer glue.

With reference to the first aspect, in one possible implementation manner, the strain clamp includes:

the main body tube, the leading-out end forms the patch panel;

the anchor cable tube is inserted into the leading-out end of the main body tube, and the leading-out end of the anchor cable tube is provided with a long ring anchor;

the wire pressing pipe is inserted into the leading-in end of the main body pipe and can also be arranged on the periphery of the wire; and

the core rod crimping pipes are inserted into the anchor cable pipes and are provided with a plurality of core rod channels which are in one-to-one correspondence with the core rods;

the main body pipe, the anchor cable pipe, the wire crimping pipe and the core rod crimping pipe are matched to form the channel, and the main body pipe and the wire crimping pipe are conductive members.

In some embodiments, the leading-out end of the anchor cable tube protrudes along the axial direction to form a leading-out cylinder, the long ring anchors are arranged on two opposite sides of the leading-out cylinder in a straddling manner, a clamping space is formed between the long ring anchors and the outer wall of the leading-out cylinder, and the outer protective layer is clamped in the clamping space.

In some embodiments, the leading-out end of the anchor cable tube protrudes radially to form a stop collar, and the stop collar abuts against the leading-out end face of the main body tube.

In some embodiments, the mandrel crimp tube comprises a crimp outer tube and a liner tube, the liner tube is inserted into the crimp outer tube, an external thread is formed on the outer circumferential surface of the crimp outer tube, an internal thread adapted to the external thread is formed on the inner wall of the anchor cable tube, and the liner tube forms the mandrel channel.

With reference to the first aspect, in one possible implementation manner, the tension reinforcement component includes a reinforcement bar, a first connecting piece and a second connecting piece, where the first connecting piece is connected with the core rod and one end of the reinforcement bar, and the second connecting piece is connected with a reinforcement rod in the optical cable and the other end of the reinforcement bar, respectively;

and the length of the reinforcing strip is smaller than that of the splicing optical fiber section.

In some embodiments, the first connecting piece comprises a first connecting pipe and a second connecting pipe parallel to the first connecting pipe, the outer peripheral surface of the second connecting pipe is fixedly connected with the outer peripheral surface of the first connecting pipe, the first connecting pipe is sleeved and fixed with the core rod, and the second connecting pipe is sleeved and fixed with the reinforcing strip;

the second connecting piece is a tubular connecting piece, and two ends of the second connecting piece are respectively sleeved and fixed with the reinforcing rod and the reinforcing strip.

Compared with the prior art, the scheme provided by the embodiment of the application has the advantages that the channel in the strain clamp is a channel extending along a straight path, the lead-out direction of the wire optical fiber is consistent with the extending direction of the wire in the strain clamp, the wire optical fiber cannot bend at an excessive angle relative to the wire or the strain clamp in the lead-out process, and the lead-out operation is simple; after the lead optical fiber is led out, the lead optical fiber is connected with the optical cable optical fiber, and as the tension reinforcing component is arranged at the connection position, and the length of the tension reinforcing component is smaller than that of the connected optical fiber section, under the condition that the tension reinforcing component is fully extended, the optical cable optical fiber and the lead optical fiber of the connected optical fiber section are still in a natural bending state, and the optical cable optical fiber and the lead optical fiber cannot be stretched and broken due to the tension; after the optical cable fiber and the lead optical fiber are connected, the outer protective layer can provide protection for the connection positions of the core rod, the optical cable fiber and the lead optical fiber, and has certain rigidity due to the fact that the outer protective layer is a corrugated pipe, so that supporting protection is formed on the periphery of the connection positions, the damage to the optical cable fiber or the lead optical fiber due to collision of foreign objects is avoided, the limitation to the bending angle of the corrugated pipe can be formed, the corrugated pipe can not bend at a large angle, the optical fiber can be effectively prevented from bending at a large angle, the loss of pulse signals and the problem that the optical cable fiber or the lead optical fiber is broken due to overlarge bending degree are avoided, and the weather-proof aging of the connected optical fiber can be protected.

In a second aspect, an embodiment of the present application further provides an optical fiber extraction method of an optical fiber bundled carbon fiber core wire, which is implemented based on the optical fiber bundled carbon fiber core wire optical fiber extraction structure assembly, and includes the following steps:

wire stripping operation is carried out on the wire, a core rod with a certain length and a wire optical fiber are exposed, and the wire and the exposed core rod are respectively penetrated into a strain clamp;

connecting one end of the tension reinforcing component with the core rod corresponding to the selected wire optical fiber, and connecting the other end of the tension reinforcing component with an optical cable;

connecting the lead optical fiber with the optical cable optical fiber exposed in the optical cable;

the outer protective layer is sleeved on the outer periphery of the core rod bundle led out from the leading-out end of the strain clamp, the tension reinforcing component, the optical cable optical fiber and the lead optical fiber, so that one end of the outer protective layer is connected with the strain clamp, and the other end of the outer protective layer is connected with the optical cable.

Compared with the prior art, the scheme provided by the embodiment of the application has the advantages that the operation steps of the extraction method are simple by adopting the optical fiber cluster type carbon fiber core lead optical fiber extraction structure assembly, the problem that the bending degree is overlarge at the extraction position of the lead optical fiber in the extraction process can be avoided, the junction position is effectively protected, the problem that the optical cable optical fiber or the lead optical fiber is stretched or bent and broken is avoided, and the safety of the installation operation and the reliability in the use process are ensured.

Drawings

FIG. 1 is a schematic diagram of an assembly structure of an optical fiber lead-out structure assembly and a lead of an optical fiber bundled carbon fiber core lead according to an embodiment of the application;

FIG. 2 is a schematic diagram of an optical fiber lead-out structure assembly of an optical fiber bundled carbon fiber core wire according to an embodiment of the application;

FIG. 3 is a schematic view of a main tube according to an embodiment of the present application;

FIG. 4 is a schematic diagram illustrating an assembly of a tension reinforcement member with an optical cable and a conductor according to an embodiment of the present application;

FIG. 5 is a schematic structural view of a first connector according to an embodiment of the present application;

FIG. 6 is a schematic side view of a first connector according to another embodiment of the present application;

FIG. 7 is a schematic side view of a liner tube according to an embodiment of the present application;

fig. 8 is a partial view of an assembled configuration of strain clamps, wires and shield assemblies employed in one embodiment of the present application.

Reference numerals illustrate:

1. strain clamp; 101. a channel; 110. a main body tube; 111. a wiring board; 120. an anchor cable tube; 121. a long ring anchor; 123. a lead-out cylinder; 124. the clamping space; 125. a limiting ring; 130. a wire crimping tube; 140. a mandrel crimping tube; 141. a mandrel channel; 142. crimping the outer tube; 143. an inner liner tube;

2. a tension reinforcement assembly; 210. a reinforcing bar; 220. a first connector; 221. a first connection pipe; 222. a second connection pipe; 230. a second connector;

3. a protective assembly; 310. an outer protective layer; 320. an inner protective layer;

4. a wire; 410. a core rod; 420. a guide wire optical fiber;

5. an optical cable; 510. an optical cable fiber; 520. a reinforcing rod;

6. splicing the optical fiber sections;

7. and (5) buffering glue.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

In the claims, specification and drawings hereof, unless explicitly defined otherwise, the terms "first," "second," or "third," etc. are used for distinguishing between different objects and not for describing a particular sequential order.

In the claims, specification and drawings of the present application, unless explicitly defined otherwise, references to orientation words such as "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", "high", "low", etc. are based on the orientation and positional relationship shown in the drawings and are merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or element referred to must have a particular orientation or be constructed and operated in a particular orientation, nor should it be construed as limiting the specific scope of the application.

In the claims, specification and drawings of the present application, unless explicitly defined otherwise, the term "fixedly connected" or "fixedly connected" should be construed broadly, i.e. any connection between them without a displacement relationship or a relative rotation relationship, that is to say includes non-detachably fixedly connected, integrally connected and fixedly connected by other means or elements.

In the claims, specification and drawings of the present application, the terms "comprising," having, "and variations thereof as used herein, are intended to be" including but not limited to.

Referring to fig. 1 to 8, an optical fiber extraction structure assembly of an optical fiber bundled carbon fiber core wire according to the present application will now be described. The optical fiber cluster type carbon fiber core wire optical fiber leading-out structure assembly comprises a strain clamp 1, a tension reinforcing component 2 and a protection component 3; a channel 101 penetrating along a straight path is formed inside the strain clamp 1; one end of the tension reinforcement component 2 is connected with a core rod 410 led out from the leading-out end of the channel 101, the other end of the tension reinforcement component is connected with an external optical cable 5, an exposed optical cable fiber 510 in the optical cable 5 and an exposed lead optical fiber 420 in the lead 4 are welded to form an exposed continuous optical fiber section 6, and the length of the tension reinforcement component 2 is smaller than that of the continuous optical fiber section 6; the protection component 3 is provided with an outer protection layer 310, the outer protection layer 310 is sleeved on the outer periphery of the core rod bundle, the tension reinforcement component 2 and the optical cable 5 which are led out from the leading-out end, one end of the outer protection layer 310 is connected with the strain clamp 1, the other end of the outer protection layer 310 is connected with the optical cable 5, and the outer protection layer 310 is a corrugated pipe.

In this embodiment, the implementation manner of the outer protective layer 310 includes, but is not limited to, stainless steel corrugated pipe, aluminum corrugated pipe, carbon steel corrugated pipe, etc., wherein the inner diameter of the corrugated pipe is 20-30 mm (for example, 25 mm), the outer diameter is 23-33 mm (for example, 28 mm), and the length is 1-1.5 m (for example, 1.2 m). The resulting splicing structure between the conductor fiber 420 and the cable fiber 510 and the conductor fiber 420.

In this embodiment, the splicing optical fiber section 6 includes an exposed optical cable fiber 510, an exposed lead optical fiber 420, and a fusion-spliced structure between the optical cable fiber 510 and the lead optical fiber 420.

In this embodiment, the wire optical fiber 420 and the optical cable 5 need to be coiled after construction, so the outer protective layer 310 needs to have a certain bending deformation capability, and further meets the requirement of coiling construction. It should be understood that the coiling of the optical cable 5 and the wire optical fiber 420 during construction needs to avoid forming a bend arc that is 20 times smaller than the diameters of the optical cable 510 and the wire optical fiber 420, and avoid increasing the fiber loss value.

Compared with the prior art, the fiber lead-out structure assembly of the fiber bundle carbon fiber core wire provided by the embodiment has the advantages that the channel 101 in the strain clamp 1 is a channel extending along a straight path, the lead-out direction of the wire optical fiber 420 is consistent with the extending direction of the wire 4 in the strain clamp 1, and in the lead-out process, the wire optical fiber 420 cannot bend at an excessive angle relative to the wire 4 or the strain clamp 1, and the lead-out operation is simple; after the lead optical fiber 420 is led out, the lead optical fiber 420 is connected with the optical cable optical fiber 510, and as the tension reinforcing component 2 is arranged at the connection position, and the length of the tension reinforcing component 2 is smaller than that of the connected optical fiber section 6, the optical cable optical fiber 510 and the lead optical fiber 420 of the connected optical fiber section 6 are still in a natural bending state under the condition that the tension reinforcing component 2 is fully extended, and the optical cable optical fiber 510 and the lead optical fiber 420 cannot be stretched and broken due to the tension; after the optical cable fiber 510 and the lead fiber 420 are connected, the outer protective layer 310 can provide protection for the connection position of the core rod 410 and the optical cable fiber 510 and the lead fiber 420, and as the outer protective layer 310 is a corrugated pipe, the outer protective layer has certain rigidity, further forms support protection on the periphery of the connection position, avoids damaging the optical cable fiber 510 or the lead fiber 420 due to collision of foreign matters, can also form limitation on the bending angle of the corrugated pipe, can not generate large-angle bending of the corrugated pipe, further can effectively prevent the optical cable fiber 510 and the lead fiber 420 from generating large-angle bending, and can also protect the weather-proof aging of the connected optical fiber, thereby avoiding the problems of breakage of the optical cable fiber 510 or the lead fiber 420 caused by overlarge bending degree.

In some embodiments, the protection component 3 further includes an inner protection layer 320, as shown in fig. 8, where the inner protection layer 320 is an elastic layer, and is sleeved on the outer circumference of the mandrel bundle, the tension reinforcement component 2 and the optical cable 5 that are led out from the leading end of the strain clamp 1, one end of the inner protection layer 320 is connected to the strain clamp 1, the other end is connected to the optical cable 5, and the outer protection layer 310 is sleeved on the outer circumference of the inner protection layer 320. Wherein the core bundle is formed by bundling a plurality of core rods 410 stripped from the wire 4. Because the inner protection layer 320 is an elastic layer, and forms an elastic protection layer outside the spliced optical fiber section 6, on one hand, the problem of optical fiber abrasion caused by direct contact between the spliced optical fiber section 6 and the outer protection layer 310 can be avoided, and on the other hand, shake energy transmitted from the outside to the spliced optical fiber section 6 can be absorbed in the assembling and using processes, the buffer protection effect is achieved on the spliced optical fiber section 6, the situation that the outer protection layer 310 collides with the spliced optical fiber section 6 directly in the shake process can be avoided, and the using reliability is improved.

On the basis of the above embodiment, referring to fig. 8, the inner protection layer 320 is filled with the buffer glue 7, a gap is formed between the outer protection layer 310 and the inner protection layer 320, and the gap is filled with the buffer glue 7.

The buffer glue 7 in the inner protective layer 320 has a positioning effect on the connected optical fiber section 6, can effectively prevent the connected optical fiber section 6 from shaking in the inner protective layer 320, even colliding with the inner protective layer 320, and avoid the optical fiber from being damaged; secondly, the shape of the connected optical fiber section 6 can be fixed after the buffer glue 7 is solidified, so that the connected optical fiber section 6 is prevented from bending deformation to a greater extent in the using process, and the using reliability is maintained; thirdly, the buffer glue 7 can form tight protection on the periphery of the continuous optical fiber section 6 when the protection assembly 3 is integrally rocked, so that collision with the inner protection layer 320 is avoided; finally, the buffer glue 7 forms a sealing package outside the connected optical fiber section 6, so that the connected optical fiber section 6 is isolated from the external environment, and the optical fiber is prevented from being corroded by external pollutants.

The buffer glue 7 between the outer protective layer 310 and the inner protective layer 320 can form a support between the outer protective layer 310 and the inner protective layer 320, so that the collision between the outer protective layer 310 and the inner protective layer 320 is avoided, and the integral structural stability of the protective assembly 3 is maintained; second, the cushion gum 7 can also form a seal at the end of the inner protective layer 320, further isolating external contaminants (e.g., water, dust, etc.).

In particular implementations, inner protective layer 320 may be implemented by, but is not limited to, a silicone tube, and inner protective layer 320 may have a length greater than the length of splicing section 6, may be 45-60 cm (e.g., 50 cm), may have an outer diameter of 15-20 mm (e.g., 17 mm), and may have an inner diameter of 11-15 mm (e.g., 13 mm). The inner diameter of inner protective layer 320 is selected to have a large influence on the protective effect, and inner protective layer 320 needs to form a complete annular enclosure around the outer circumference of splicing optical fiber section 6, and needs to be as close to splicing optical fiber section 6 as possible.

Referring to fig. 8, in some embodiments, inner shield 320 extends into channel 101 to provide a connection between inner shield 320 and strain clamp 1.

In some embodiments, the strain clamp 1 may have a structure as shown in fig. 1 to 3. Referring to fig. 1 to 3, the strain clamp 1 includes a main body tube 110, an anchor cable tube 120, a wire crimp tube 130, and a core crimp tube 140; the lead-out end of the main body tube 110 forms a wiring board 111; the anchor cable tube 120 is inserted into the leading-out end of the main body tube 110, and the leading-out end of the anchor cable tube 120 is provided with a long ring anchor 121; the wire crimping tube 130 is inserted into the leading-in end of the main body tube 110 and can also be sleeved on the periphery of the wire 4; the core rod crimping pipes 140 are inserted into the anchor cable pipes 120, and the core rod crimping pipes 140 are provided with a plurality of core rod channels 141 which are in one-to-one correspondence with the core rods 410; the main body tube 110, the anchor cable tube 120, the wire crimping tube 130 and the mandrel crimping tube 140 cooperate to form a channel 101; the main body tube 110 and the wire crimping tube 130 are both conductive members to meet the need for electrically connecting the aluminum strands of the wires 4 with other cables through strain clamps. The passage 101 is formed by the inner space of the main body tube 110, the inner space of the wire crimping tube 130, the inner space of the mandrel crimping tube 140 and the end opening of the anchor cable tube 120, and forms the passage 101 extending along a straight path, as shown in fig. 1 and 2. In this embodiment, the main body tube 110 and the wire crimping tube 130 are both aluminum conductive tubes, and the anchor cable tube 120 is a steel tube.

In this embodiment, the anchor cable tube 120 is mainly used for fixing the mandrel press-fit tube 140 to the main body tube 110, and simultaneously, forms an opening for leading out the mandrel bundles and connecting with the inner protection layer 320 and the outer protection layer 310, and in addition, the long ring anchor 121 can be connected with structures such as iron towers or electric poles. The plurality of mandrel channels 141 in the mandrel crimp tube 140 serve to separate and secure the different mandrels 410, facilitating the extraction of the lead optical fibers 420. The strain clamp 1 has the advantages of simple integral structure, reasonable design, convenient installation and wire arrangement, and can effectively improve the construction efficiency.

On the basis of the above embodiment, the anchor cable tube 120 is fixed by crimping with the main body tube 110, the outer periphery of the anchor cable tube 120 is formed with an annular anti-drop groove, after crimping, the inner wall of the main body tube 110 can be embedded into the anti-drop groove, the reliability of crimping fixation is improved, and the anchor cable tube 120 is prevented from falling out of the main body tube 110.

In some embodiments, the leading-out end of the anchor cable tube 120 protrudes axially to form a leading-out cylinder 123, as shown in fig. 1 and 2, the long ring anchors 121 are straddled on opposite sides of the leading-out cylinder 123, a clamping space 124 is formed between the long ring anchors 121 and the outer wall of the leading-out cylinder 123, and the outer protective layer 310 is clamped in the clamping space 124. In this embodiment, the main body of the cable pipe 120 and the extraction cylinder 123 have an inner diameter of 16 to 20mm (e.g., 18 mm), the extraction cylinder 123 has an outer diameter of 22 to 26mm (e.g., 24 mm), and the extraction cylinder 123 has a length of 23 to 27mm (e.g., 25 mm). The leading-out cylinder 123 mainly provides a space for connecting with the protection component 3 at the leading-out end of the channel 101, so that convenience in assembly is improved; meanwhile, the clamping space 124 provides radial limiting for the outer protective layer 310, so that the assembly reliability is improved. In specific implementation, the side wall of the extraction cylinder 123 is provided with a screw hole, the side wall of the outer protective layer 310 is provided with a via hole, and the threaded fastener penetrates through the hole and is then screwed with the screw hole, so that the outer protective layer 310 is axially positioned.

In some embodiments, in order to conveniently limit the axial position of the anchor cable tube 120 relative to the main body tube 110, the outlet end of the anchor cable tube 120 protrudes radially to form a limiting ring 125, and the limiting ring 125 abuts against the outlet end face of the main body tube 110, as shown in fig. 1 and 2, so that the problem that the assembly reliability is affected by too shallow insertion is avoided, and the problem that the assembly of the long ring anchor 121 with other components is affected by too deep insertion is also avoided.

In some embodiments, the mandrel crimp tube 140 may have the structure shown in fig. 1, 2, and 7. Referring to fig. 1, 2 and 7, the mandrel crimp tube 140 includes a crimp outer tube 142 and a liner tube 143, the liner tube 143 is inserted into the crimp outer tube 142, an outer circumferential surface of the crimp outer tube 142 forms an external thread, an inner wall of the anchor cable tube 120 has an internal thread adapted to the external thread, and the liner tube 143 forms a mandrel channel 141. In this embodiment, the inner tube 143 is an aluminum tube, and the crimp outer tube 142 is a steel tube. In this embodiment, the crimp outer tube 142 extends out of the anchor cable tube 120 in a direction toward the wire crimp tube 130, with a distance between the crimp outer tube 142 and the wire crimp tube 130. In this embodiment, at least two inner tubes 143 may be disposed along the axial direction of the crimp outer tube 142, as shown in fig. 1 and 2; alternatively, only one lining pipe 143 may be provided, so that the requirements of supporting the mandrel 410 and crimping and assembling with the crimping outer pipe 142 can be satisfied.

In some embodiments, the tension reinforcement assembly 2 may be configured as shown in fig. 4. Referring to fig. 4, the tension reinforcement assembly 2 includes a reinforcement bar 210, a first connecting member 220 and a second connecting member 230, wherein the first connecting member 220 is respectively connected with the core rod 410 and one end of the reinforcement bar 210, and the second connecting member 230 is respectively connected with the reinforcement bar 520 and the other end of the reinforcement bar 210 in the optical cable 5, and the length of the reinforcement bar 210 is smaller than the length of the splicing optical fiber section 6. The reinforcing bar 210 may be an organic fiber rope or an organic fiber rod, such as a nylon rope, a nylon rod, a glass fiber rod, etc., and the diameter of the reinforcing bar 210 is 2-4 mm (e.g., 3 mm). The reinforcing strip 210 is connected to the core rod 410 and the reinforcing rod 520 through the first connector 220 and the second connector 230, and is mainly used for bearing tensile force, so as to ensure that the continuous optical fiber section 6 is not broken.

On the basis of the above embodiment, referring to fig. 5 and 6, the first connecting piece 220 includes a first connecting pipe 221 and a second connecting pipe 222 parallel to the first connecting pipe 221, the outer circumferential surface of the second connecting pipe 222 is fixedly connected with the outer circumferential surface of the first connecting pipe 221, the first connecting pipe 221 is fixedly sleeved with the core rod 410, and the second connecting pipe 222 is fixedly sleeved with the reinforcing strip 210; the second connecting member 230 is a tubular connecting member, and two ends of the second connecting member 230 are respectively sleeved and fixed with the reinforcing rod 520 and the reinforcing strip 210. Wherein, the first connecting piece 220 and the second connecting piece 230 are both aluminum members. In this embodiment, the first connection tube 221 and the second connection tube 222 form a radial offset distribution relationship, so that the reinforcing strip 210 avoids the guide optical fiber 420.

In particular, the first connection pipe 221 and the second connection pipe 222 are closed-loop pipes, as shown in fig. 5, the inner diameters of the first connection pipe 221 and the second connection pipe 222 are 4mm, and the wall thicknesses are 1mm. In other embodiments, the side wall of the first connecting tube 221 is notched for the lateral insertion of the mandrel 410, and the second connecting tube 222 is a closed-loop tube, as shown in fig. 6.

In particular, the second connector 230 has a length of 6cm, an outer diameter of 6mm and an inner diameter of 4mm.

Based on the same inventive concept, the embodiment of the application also provides an optical fiber extraction method of the optical fiber bundling type carbon fiber core wire, which is realized based on the optical fiber bundling type carbon fiber core wire optical fiber extraction structure assembly, and comprises the following steps:

wire stripping operation is carried out on the wire 4, a certain length of core rod 410 and a certain length of wire optical fiber 420 are exposed, and the wire 4 and the exposed core rod 410 are respectively penetrated into the strain clamp 1;

connecting one end of the tension reinforcement component 2 with a core rod 410 corresponding to the selected conducting wire optical fiber 420, and connecting the other end of the tension reinforcement component 2 with the optical cable 5;

splicing the lead optical fiber 420 with the optical cable fiber 510 exposed in the optical cable 5;

the outer protective layer 310 is sleeved on the outer circumferences of the mandrel bundle, the tension reinforcing component 2, the optical cable 5, the optical cable 510 and the lead optical fiber 420 which are led out from the leading-out end of the strain clamp 1, so that one end of the outer protective layer 310 is connected with the strain clamp 1, and the other end is connected with the optical cable 5.

Compared with the prior art, the optical fiber cluster type carbon fiber core lead optical fiber lead-out structure assembly provided by the embodiment has the advantages that the operation steps of the lead-out method are simple, the problem that the lead-out position of the lead optical fiber 420 is overlarge in bending degree in the lead-out process can be avoided, the junction position is effectively protected, the problem that the optical cable optical fiber 510 or the lead optical fiber 420 is stretched or bent and broken is avoided, and the safety of installation operation and the reliability of the use process are ensured.

In some embodiments, the wire 4 is stripped to expose a length of core rod 410 and a wire optical fiber 420, and the wire 4 and the exposed core rod 410 are respectively threaded into the strain clamp 1, specifically including:

cutting the head end of the wire 4 flat with a tool (e.g., a hacksaw);

marking an aluminum peeling mark at a first distance (for example, 90 cm) from the head end of the wire 4, performing circular cutting along the aluminum peeling mark, peeling off the aluminum strand on the outer layer of the wire 4, and not damaging the surface of the core rod 410;

peeling off the coating layer on the outer periphery of the core rod 410, and leaking out the core rod 410;

marking an optical fiber stripping finish line at a second distance (the second distance is smaller than the first distance, and the value of the second distance can be 30 cm) from the head end of the core rod 410;

threading the wire 4 into the wire crimp tube 130 and the main body tube 110, and making the wire crimp tube 130 and the main body tube 110 be 1m apart from the aluminum stripping stock mark;

penetrating the core rods 410 into the corresponding core rod passages 141 in the inner liner tube 143, penetrating the inner liner tube 143 into the crimp outer tube 142, and making the crimp outer tube 142 and the inner liner tube 143 be 10cm away from the fiber stripping finish line;

the wire optical fiber 420 is stripped using a crimping process.

Based on the above embodiment, the wire optical fiber 420 is stripped by a press-clamping method, which specifically includes:

symmetrically cutting off the coated fabric on the surface of the mandrel 410 by using a special plane cutter to expose the carbon fiber layer, wherein the cut-off size is 1mm wide, 1mm thick and 30cm long;

pressurizing the core rods 410 one by using a pressing clamp, crushing the head end of the core rod 410, finding out the conducting wire optical fibers 420, tearing the carbon fiber layer of the core rod 410 by using a vice and a paper knife, and separating out the conducting wire optical fibers 420;

in the process of tearing the carbon fiber layer, the tearing included angle of the carbon fiber layer is not more than 10 degrees, so as to avoid tearing the wire optical fiber 420.

In some embodiments, connecting one end of the tension reinforcement component 2 with the mandrel 410 corresponding to the selected guide-wire optical fiber 420 specifically includes:

selecting a core rod 410 on the outer layer of the core rod bundle, penetrating the first connecting pipe 221, enabling the first connecting pipe 221 to be 40mm away from the fiber stripping finishing line, and crimping the core rod 410 with the first connecting pipe 221 by using crimping pliers;

the reinforcing bar 210 is inserted into the second connecting pipe 222, the reinforcing bar 210 is crimped with the second connecting pipe 222 by a crimping tool, and a heat-shrinkable protective tube (the tube length is about 6 cm) reinforced by steel wires is sleeved at the separation point of the wire optical fiber 420 and the core rod 410, so that heat-shrinkable protection is realized.

On the basis of the embodiment, the steel wire reinforced heat-shrinkable protective tube is sleeved in to realize heat shrinkage protection, and then the heat-shrinkable protective tube further comprises:

bundling the wire optical fibers 420, penetrating the wire optical fibers into the anchor cable pipe 120, screwing the anchor cable pipe 120 and the crimping outer pipe 142, and extending the optical fiber stripping finishing line out of the extraction cylinder 123 by 4-6 cm (for example, 5 cm);

the anchor cable tube 120, the crimping outer tube 142 and the lining tube 143 are crimped by a hydraulic press, the crimping pressure is 80MPa, the overlap joint amount of each die is not less than 50%, each die can be balanced and expanded, and the damage of the core rod 410 and the lead optical fiber 420 is prevented;

crimping the main body pipe 110, the wire crimping pipe 130 and the wire 4 by a hydraulic press, crimping the main body pipe 110 and the anchor cable pipe 120 by the hydraulic press, wherein the crimping pressure is 80MPa;

wherein, the inner and outer diameters of the crimp outer tube 142 and the inner and outer diameter of the wire crimp tube 130 may affect the tension of the wire 4 and the loss value of the wire optical fiber 420, and even damage the wire optical fiber 420, and accurate control is required.

In some embodiments, splicing the lead fiber 420 with the exposed cable fiber 510 in the cable 5 specifically includes:

penetrating the head end of the optical cable 5 into the outer protective layer 310 (stainless steel corrugated tube);

stripping 30cm of optical cable fiber 510 by using a special optical cable stripping knife, and reserving a reinforcing rod 520 of the optical cable 5;

stripping and welding the lead optical fiber 420 and the optical cable optical fiber 510 on an optical fiber welding machine respectively;

the fusion splice of the conductor fiber 420 and the cable fiber 510 is reinforced with heat shrink tubing.

Among them, the fusion splice loss of the optical fiber is the key to success, and it is necessary to keep the fusion splicing operation environment clean and flush with the notch. Wiping the fusion area of the optical cable fiber 510 and the lead fiber 420 with alcohol, wherein the wiping alcohol uses a concentration of more than 99%; if the fiber quartz core section stubbles and oblique stubbles appear, the cutter needs to be replaced in time. The specific optical fiber fusion operation sequence is as follows: 1) stripping the coating layers of the optical cable fiber 510 and the lead fiber 420 by using a Muller clamp, 2) wiping with alcohol, 3) cutting, 4) welding by using a welding machine in an electric discharge manner, and 5) protecting by thermal shrinkage.

In some embodiments, the other end of the tension reinforcement member 2 is connected to the optical cable 5, specifically including:

stripping out the strength rods 520 in the fiber optic cable 5;

inserting the reinforcing bar 210 and the reinforcing bar 520 into the second connecting member 230 from both ends of the second connecting member 230, respectively, and crimping the reinforcing bar 210 with the second connecting member 230 by crimping;

wherein, the reinforcing strip 210 is slightly shorter than the extension length of the continuous optical fiber section 6 by 4-7 mm, so that the tensile force required to be born by the continuous optical fiber section 6 is completely borne by the reinforcing strip 210, and fiber breakage is avoided.

In some embodiments, the outer protective layer 310 is sleeved on the outer circumference of the mandrel bundle, the tension reinforcement assembly 2, the optical cable 5, the optical cable fiber 510 and the lead optical fiber 420 which are led out from the leading-out end of the strain clamp 1, and the method further comprises the following steps:

the inner protective layer 320 (silicone rubber tube) is cut along the length, and the splicing optical fiber section 6 and the reinforcing strip 210 are arranged into a bundle and plugged into the inner protective layer 320;

one end of the inner protection layer 320 is plugged into the outlet barrel 123, the plugging length of the inner protection layer 320 is not less than 2cm, and the other end of the inner protection layer 320 is wrapped outside the optical cable 5;

the inner protective layer 320 is filled with a cushion rubber 7 (normal temperature vulcanized rubber paste);

binding the outer periphery of the inner protective layer 320 by using binding bands, wherein the distance between adjacent binding bands is 2-4 cm (for example, 3 cm) until the buffer glue 7 is solidified, and the solidifying time is about eight hours;

wherein the optical cable fiber 510 and the guide wire fiber 420 need to be maintained in a naturally bent state in the inner protection layer 320, to avoid forming a bent arc of less than 20 times the fiber diameter, which would otherwise increase the fiber loss value.

Based on this embodiment, the outer protection layer 310 is sleeved on the outer circumferences of the mandrel bundle, the tension reinforcing component 2, the optical cable 5, the optical cable 510 and the lead optical fiber 420 which are led out from the leading-out end of the strain clamp, so that one end of the outer protection layer 310 is connected with the strain clamp 1, and the other end is connected with the optical cable 5, specifically comprising:

a layer of buffer rubber 7 (normal temperature vulcanized rubber paste) is uniformly smeared on the periphery of the inner protective layer 320;

an outer shield layer 310 (stainless steel bellows) is sleeved on the outer periphery of the inner shield layer 320;

one end of the inner protection layer 320 is clamped into the clamping space 124 and fastened by a stainless steel screw, and the buffer glue 7 at the other end of the inner protection layer 320 is in sealing connection with the optical cable 5.

This embodiment forms four-fold protection of two layers of buffer glue 7 (normal temperature vulcanized rubber paste), one layer of inner protective layer 320 (silicone rubber tube) and outer protective layer 310 (stainless steel corrugated tube), and realizes effective weather-proof protection of the adjacent optical fiber section 6.

The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application.

Claims (10)

1. The optical fiber lead-out structure assembly of the optical fiber bunched carbon fiber core wire is characterized by comprising a strain clamp, a tension reinforcing component and a protection component; a channel penetrating along a straight path is formed inside the strain clamp; one end of the tension reinforcing component is connected with a core rod led out from the leading-out end of the channel, the other end of the tension reinforcing component is connected with an external optical cable, an exposed optical cable optical fiber in the optical cable and an exposed lead optical fiber in the lead are welded to form an exposed continuous optical fiber section, and the length of the tension reinforcing component is smaller than that of the continuous optical fiber section; the protection component is provided with an outer protection layer, the outer protection layer is sleeved on the core rod bundle led out from the leading-out end, the tension reinforcing component and the periphery of the optical cable, one end of the outer protection layer is connected with the strain clamp, the other end of the outer protection layer is connected with the optical cable, and the outer protection layer is a corrugated pipe.

2. The fiber optic bundled carbon fiber core wire fiber optic pigtail structure assembly of claim 1, wherein the protective component further comprises an inner protective layer, the inner protective layer is an elastic layer which is sleeved on the outer periphery of the core bundle, the tension reinforcing component and the optical cable, one end of the inner protective layer is connected with the strain clamp, the other end of the inner protective layer is connected with the optical cable, and the outer protective layer is sleeved on the outer periphery of the inner protective layer.

3. The fiber bundled carbon fiber core wire fiber optic pigtail structure assembly of claim 2, wherein the inner protective layer is internally filled with a buffer glue, a gap is formed between the outer protective layer and the inner protective layer, and the buffer glue is filled in the gap.

4. The fiber optic bundled carbon fiber core conductor fiber optic pigtail structure assembly of claim 1, wherein the strain clamp comprises:

the main body tube, the leading-out end forms the patch panel;

the anchor cable tube is inserted into the leading-out end of the main body tube, and the leading-out end of the anchor cable tube is provided with a long ring anchor;

the wire pressing pipe is inserted into the leading-in end of the main body pipe and can also be arranged on the periphery of the wire; and

the core rod crimping pipes are inserted into the anchor cable pipes and are provided with a plurality of core rod channels which are in one-to-one correspondence with the core rods;

the main body pipe, the anchor cable pipe, the wire crimping pipe and the core rod crimping pipe are matched to form the channel, and the main body pipe and the wire crimping pipe are conductive members.

5. The fiber optic bundled carbon fiber core wire fiber optic pigtail structure assembly of claim 4, wherein the pigtail end of the anchor cable tube protrudes axially to form a pigtail barrel, the long ring anchors are arranged on opposite sides of the pigtail barrel in a straddling manner, a clamping space is formed between the long ring anchors and the outer wall of the pigtail barrel, and the outer protective layer is clamped in the clamping space.

6. The fiber optic bundled carbon fiber core wire fiber optic pigtail structure assembly of claim 4, wherein the pigtail of the anchor cable tube radially projects to form a stop collar, the stop collar abutting the pigtail face of the main tube.

7. The fiber optic bundled carbon fiber core wire fiber optic pigmenting structure assembly of claim 4, wherein the mandrel crimp tube comprises a crimp outer tube and a liner tube, the liner tube is inserted into the crimp outer tube, an outer thread is formed on an outer circumferential surface of the crimp outer tube, an inner wall of the anchor tube has an inner thread adapted to the outer thread, and the liner tube forms the mandrel channel.

8. The fiber optic bundled carbon fiber core wire fiber optic pigtail structure assembly of claim 1, wherein the tension reinforcement assembly comprises a reinforcement bar, a first connector and a second connector, the first connector is respectively connected with the core rod and one end of the reinforcement bar, the second connector is respectively connected with the reinforcement bar in the optical cable and the other end of the reinforcement bar, and the length of the reinforcement bar is less than the length of the splicing optical fiber section.

9. The fiber optic bundled carbon fiber core wire fiber optic pigtail structure assembly of claim 8, wherein the first connector comprises a first connector tube and a second connector tube parallel to the first connector tube, wherein the outer peripheral surface of the second connector tube is fixedly connected with the outer peripheral surface of the first connector tube, the first connector tube is fixedly sleeved with the core rod, and the second connector tube is fixedly sleeved with the reinforcing strip;

the second connecting piece is a tubular connecting piece, and two ends of the second connecting piece are respectively sleeved and fixed with the reinforcing rod and the reinforcing strip.

10. An optical fiber extraction method of an optical fiber bundling type carbon fiber core wire, which is realized based on the optical fiber extraction structure assembly of the optical fiber bundling type carbon fiber core wire according to any one of claims 1-9, and is characterized by comprising the following steps:

wire stripping operation is carried out on the wire, a core rod with a certain length and a wire optical fiber are exposed, and the wire and the exposed core rod are respectively penetrated into a strain clamp;

connecting one end of the tension reinforcing component with the core rod corresponding to the selected wire optical fiber, and connecting the other end of the tension reinforcing component with an optical cable;

connecting the lead optical fiber with the optical cable optical fiber exposed in the optical cable;

the outer protective layer is sleeved on the outer periphery of the core rod bundle led out from the leading-out end of the strain clamp, the tension reinforcing component, the optical cable optical fiber and the lead optical fiber, so that one end of the outer protective layer is connected with the strain clamp, and the other end of the outer protective layer is connected with the optical cable.